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"
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 /* Hook run before changing a major mode. */
150 Lisp_Object Vchange_major_mode_hook
, Qchange_major_mode_hook
;
152 /* List of functions to call before changing an unmodified buffer. */
153 Lisp_Object Vfirst_change_hook
;
155 Lisp_Object Qfirst_change_hook
;
156 Lisp_Object Qbefore_change_functions
;
157 Lisp_Object Qafter_change_functions
;
158 Lisp_Object Qucs_set_table_for_input
;
160 /* If nonzero, all modification hooks are suppressed. */
161 int inhibit_modification_hooks
;
163 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
165 Lisp_Object Qprotected_field
;
167 Lisp_Object QSFundamental
; /* A string "Fundamental" */
169 Lisp_Object Qkill_buffer_hook
;
171 Lisp_Object Qget_file_buffer
;
173 Lisp_Object Qoverlayp
;
175 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
177 Lisp_Object Qmodification_hooks
;
178 Lisp_Object Qinsert_in_front_hooks
;
179 Lisp_Object Qinsert_behind_hooks
;
181 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
182 static void free_buffer_text
P_ ((struct buffer
*b
));
183 static struct Lisp_Overlay
* copy_overlays
P_ ((struct buffer
*, struct Lisp_Overlay
*));
184 static void modify_overlay
P_ ((struct buffer
*, EMACS_INT
, EMACS_INT
));
185 static Lisp_Object buffer_lisp_local_variables
P_ ((struct buffer
*));
188 /* For debugging; temporary. See set_buffer_internal. */
189 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
196 error ("No buffer named %s", SDATA (spec
));
197 error ("Invalid buffer argument");
200 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
201 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
202 Value is nil if OBJECT is not a buffer or if it has been killed. */)
206 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
210 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
211 doc
: /* Return a list of all existing live buffers.
212 If the optional arg FRAME is a frame, we return the buffer list
213 in the proper order for that frame: the buffers in FRAME's `buffer-list'
214 frame parameter come first, followed by the rest of the buffers. */)
218 Lisp_Object framelist
, general
;
219 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
227 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
229 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
231 while (! NILP (tail
))
233 general
= Fdelq (XCAR (tail
), general
);
236 return nconc2 (framelist
, general
);
242 /* Like Fassoc, but use Fstring_equal to compare
243 (which ignores text properties),
244 and don't ever QUIT. */
247 assoc_ignore_text_properties (key
, list
)
248 register Lisp_Object key
;
251 register Lisp_Object tail
;
252 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
254 register Lisp_Object elt
, tem
;
256 tem
= Fstring_equal (Fcar (elt
), key
);
263 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
264 doc
: /* Return the buffer named NAME (a string).
265 If there is no live buffer named NAME, return nil.
266 NAME may also be a buffer; if so, the value is that buffer. */)
268 register Lisp_Object name
;
274 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
277 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
278 doc
: /* Return the buffer visiting file FILENAME (a string).
279 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
280 If there is no such live buffer, return nil.
281 See also `find-buffer-visiting'. */)
283 register Lisp_Object filename
;
285 register Lisp_Object tail
, buf
, tem
;
288 CHECK_STRING (filename
);
289 filename
= Fexpand_file_name (filename
, Qnil
);
291 /* If the file name has special constructs in it,
292 call the corresponding file handler. */
293 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
295 return call2 (handler
, Qget_file_buffer
, filename
);
297 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
299 buf
= Fcdr (XCAR (tail
));
300 if (!BUFFERP (buf
)) continue;
301 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
302 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
310 get_truename_buffer (filename
)
311 register Lisp_Object filename
;
313 register Lisp_Object tail
, buf
, tem
;
315 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
317 buf
= Fcdr (XCAR (tail
));
318 if (!BUFFERP (buf
)) continue;
319 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
320 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
327 /* Incremented for each buffer created, to assign the buffer number. */
330 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
331 doc
: /* Return the buffer named NAME, or create such a buffer and return it.
332 A new buffer is created if there is no live buffer named NAME.
333 If NAME starts with a space, the new buffer does not keep undo information.
334 If NAME is a buffer instead of a string, then it is the value returned.
335 The value is never nil. */)
337 register Lisp_Object name
;
339 register Lisp_Object buf
;
340 register struct buffer
*b
;
342 buf
= Fget_buffer (name
);
346 if (SCHARS (name
) == 0)
347 error ("Empty string for buffer name is not allowed");
349 b
= (struct buffer
*) allocate_buffer ();
351 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
353 /* An ordinary buffer uses its own struct buffer_text. */
354 b
->text
= &b
->own_text
;
357 BUF_GAP_SIZE (b
) = 20;
359 /* We allocate extra 1-byte at the tail and keep it always '\0' for
360 anchoring a search. */
361 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
363 if (! BUF_BEG_ADDR (b
))
364 buffer_memory_full ();
371 BUF_PT_BYTE (b
) = BEG_BYTE
;
372 BUF_GPT_BYTE (b
) = BEG_BYTE
;
373 BUF_BEGV_BYTE (b
) = BEG_BYTE
;
374 BUF_ZV_BYTE (b
) = BEG_BYTE
;
375 BUF_Z_BYTE (b
) = BEG_BYTE
;
377 BUF_CHARS_MODIFF (b
) = 1;
378 BUF_OVERLAY_MODIFF (b
) = 1;
379 BUF_SAVE_MODIFF (b
) = 1;
380 BUF_INTERVALS (b
) = 0;
381 BUF_UNCHANGED_MODIFIED (b
) = 1;
382 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
383 BUF_END_UNCHANGED (b
) = 0;
384 BUF_BEG_UNCHANGED (b
) = 0;
385 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
387 b
->newline_cache
= 0;
388 b
->width_run_cache
= 0;
389 b
->width_table
= Qnil
;
390 b
->prevent_redisplay_optimizations_p
= 1;
392 /* Put this on the chain of all buffers including killed ones. */
393 b
->next
= all_buffers
;
396 /* An ordinary buffer normally doesn't need markers
397 to handle BEGV and ZV. */
399 b
->begv_marker
= Qnil
;
402 name
= Fcopy_sequence (name
);
403 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
406 if (SREF (name
, 0) != ' ')
412 reset_buffer_local_variables (b
, 1);
414 b
->mark
= Fmake_marker ();
415 BUF_MARKERS (b
) = NULL
;
418 /* Put this in the alist of all live buffers. */
420 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
422 /* An error in calling the function here (should someone redfine it)
423 can lead to infinite regress until you run out of stack. rms
424 says that's not worth protecting against. */
425 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
426 /* buf is on buffer-alist, so no gcpro. */
427 call1 (Qucs_set_table_for_input
, buf
);
433 /* Return a list of overlays which is a copy of the overlay list
434 LIST, but for buffer B. */
436 static struct Lisp_Overlay
*
437 copy_overlays (b
, list
)
439 struct Lisp_Overlay
*list
;
442 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
444 XSETBUFFER (buffer
, b
);
446 for (; list
; list
= list
->next
)
448 Lisp_Object overlay
, start
, end
, old_overlay
;
451 XSETMISC (old_overlay
, list
);
452 charpos
= marker_position (OVERLAY_START (old_overlay
));
453 start
= Fmake_marker ();
454 Fset_marker (start
, make_number (charpos
), buffer
);
455 XMARKER (start
)->insertion_type
456 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
458 charpos
= marker_position (OVERLAY_END (old_overlay
));
459 end
= Fmake_marker ();
460 Fset_marker (end
, make_number (charpos
), buffer
);
461 XMARKER (end
)->insertion_type
462 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
464 overlay
= allocate_misc ();
465 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
466 OVERLAY_START (overlay
) = start
;
467 OVERLAY_END (overlay
) = end
;
468 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
469 XOVERLAY (overlay
)->next
= NULL
;
472 tail
= tail
->next
= XOVERLAY (overlay
);
474 result
= tail
= XOVERLAY (overlay
);
481 /* Clone per-buffer values of buffer FROM.
483 Buffer TO gets the same per-buffer values as FROM, with the
484 following exceptions: (1) TO's name is left untouched, (2) markers
485 are copied and made to refer to TO, and (3) overlay lists are
489 clone_per_buffer_values (from
, to
)
490 struct buffer
*from
, *to
;
492 Lisp_Object to_buffer
;
495 XSETBUFFER (to_buffer
, to
);
497 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
499 offset
+= sizeof (Lisp_Object
))
503 obj
= PER_BUFFER_VALUE (from
, offset
);
506 struct Lisp_Marker
*m
= XMARKER (obj
);
507 obj
= Fmake_marker ();
508 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
509 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
512 PER_BUFFER_VALUE (to
, offset
) = obj
;
515 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
517 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
518 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
520 /* Get (a copy of) the alist of Lisp-level local variables of FROM
521 and install that in TO. */
522 to
->local_var_alist
= buffer_lisp_local_variables (from
);
525 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
527 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
528 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
529 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
530 NAME should be a string which is not the name of an existing buffer.
531 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
532 such as major and minor modes, in the indirect buffer.
533 CLONE nil means the indirect buffer's state is reset to default values. */)
534 (base_buffer
, name
, clone
)
535 Lisp_Object base_buffer
, name
, clone
;
537 Lisp_Object buf
, tem
;
541 buf
= Fget_buffer (name
);
543 error ("Buffer name `%s' is in use", SDATA (name
));
546 base_buffer
= Fget_buffer (base_buffer
);
547 if (NILP (base_buffer
))
548 error ("No such buffer: `%s'", SDATA (tem
));
549 if (NILP (XBUFFER (base_buffer
)->name
))
550 error ("Base buffer has been killed");
552 if (SCHARS (name
) == 0)
553 error ("Empty string for buffer name is not allowed");
555 b
= (struct buffer
*) allocate_buffer ();
556 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
558 if (XBUFFER (base_buffer
)->base_buffer
)
559 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
561 b
->base_buffer
= XBUFFER (base_buffer
);
563 /* Use the base buffer's text object. */
564 b
->text
= b
->base_buffer
->text
;
566 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
567 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
568 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
569 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
570 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
571 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
573 b
->newline_cache
= 0;
574 b
->width_run_cache
= 0;
575 b
->width_table
= Qnil
;
577 /* Put this on the chain of all buffers including killed ones. */
578 b
->next
= all_buffers
;
581 name
= Fcopy_sequence (name
);
582 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
586 reset_buffer_local_variables (b
, 1);
588 /* Put this in the alist of all live buffers. */
590 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
592 b
->mark
= Fmake_marker ();
595 /* The multibyte status belongs to the base buffer. */
596 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
598 /* Make sure the base buffer has markers for its narrowing. */
599 if (NILP (b
->base_buffer
->pt_marker
))
601 b
->base_buffer
->pt_marker
= Fmake_marker ();
602 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
603 BUF_PT (b
->base_buffer
),
604 BUF_PT_BYTE (b
->base_buffer
));
606 if (NILP (b
->base_buffer
->begv_marker
))
608 b
->base_buffer
->begv_marker
= Fmake_marker ();
609 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
610 BUF_BEGV (b
->base_buffer
),
611 BUF_BEGV_BYTE (b
->base_buffer
));
613 if (NILP (b
->base_buffer
->zv_marker
))
615 b
->base_buffer
->zv_marker
= Fmake_marker ();
616 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
617 BUF_ZV (b
->base_buffer
),
618 BUF_ZV_BYTE (b
->base_buffer
));
619 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
624 /* Give the indirect buffer markers for its narrowing. */
625 b
->pt_marker
= Fmake_marker ();
626 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
627 b
->begv_marker
= Fmake_marker ();
628 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
629 b
->zv_marker
= Fmake_marker ();
630 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
631 XMARKER (b
->zv_marker
)->insertion_type
= 1;
635 struct buffer
*old_b
= current_buffer
;
637 clone_per_buffer_values (b
->base_buffer
, b
);
639 b
->file_truename
= Qnil
;
640 b
->display_count
= make_number (0);
642 b
->auto_save_file_name
= Qnil
;
643 set_buffer_internal_1 (b
);
644 Fset (intern ("buffer-save-without-query"), Qnil
);
645 Fset (intern ("buffer-file-number"), Qnil
);
646 Fset (intern ("buffer-stale-function"), Qnil
);
647 set_buffer_internal_1 (old_b
);
654 delete_all_overlays (b
)
659 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
660 have to empty the list, otherwise we end up with overlays that
661 think they belong to this buffer while the buffer doesn't know about
663 while (b
->overlays_before
)
665 XSETMISC (overlay
, b
->overlays_before
);
666 Fdelete_overlay (overlay
);
668 while (b
->overlays_after
)
670 XSETMISC (overlay
, b
->overlays_after
);
671 Fdelete_overlay (overlay
);
673 eassert (b
->overlays_before
== NULL
);
674 eassert (b
->overlays_after
== NULL
);
677 /* Reinitialize everything about a buffer except its name and contents
679 If called on an already-initialized buffer, the list of overlays
680 should be deleted before calling this function, otherwise we end up
681 with overlays that claim to belong to the buffer but the buffer
682 claims it doesn't belong to it. */
686 register struct buffer
*b
;
689 b
->file_truename
= Qnil
;
690 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
692 XSETFASTINT (b
->save_length
, 0);
693 b
->last_window_start
= 1;
694 /* It is more conservative to start out "changed" than "unchanged". */
696 b
->prevent_redisplay_optimizations_p
= 1;
698 b
->auto_save_modified
= 0;
699 b
->auto_save_failure_time
= -1;
700 b
->auto_save_file_name
= Qnil
;
702 b
->overlays_before
= NULL
;
703 b
->overlays_after
= NULL
;
704 b
->overlay_center
= BEG
;
705 b
->mark_active
= Qnil
;
706 b
->point_before_scroll
= Qnil
;
707 b
->file_format
= Qnil
;
708 b
->auto_save_file_format
= Qt
;
709 b
->last_selected_window
= Qnil
;
710 XSETINT (b
->display_count
, 0);
711 b
->display_time
= Qnil
;
712 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
713 b
->cursor_type
= buffer_defaults
.cursor_type
;
714 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
716 b
->display_error_modiff
= 0;
719 /* Reset buffer B's local variables info.
720 Don't use this on a buffer that has already been in use;
721 it does not treat permanent locals consistently.
722 Instead, use Fkill_all_local_variables.
724 If PERMANENT_TOO is 1, then we reset permanent built-in
725 buffer-local variables. If PERMANENT_TOO is 0,
726 we preserve those. */
729 reset_buffer_local_variables (b
, permanent_too
)
730 register struct buffer
*b
;
736 /* Reset the major mode to Fundamental, together with all the
737 things that depend on the major mode.
738 default-major-mode is handled at a higher level.
739 We ignore it here. */
740 b
->major_mode
= Qfundamental_mode
;
742 b
->mode_name
= QSFundamental
;
743 b
->minor_modes
= Qnil
;
745 /* If the standard case table has been altered and invalidated,
746 fix up its insides first. */
747 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
748 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
749 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
750 Fset_standard_case_table (Vascii_downcase_table
);
752 b
->downcase_table
= Vascii_downcase_table
;
753 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
754 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
755 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
756 b
->invisibility_spec
= Qt
;
758 b
->buffer_file_type
= Qnil
;
761 /* Reset all (or most) per-buffer variables to their defaults. */
762 b
->local_var_alist
= Qnil
;
763 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
764 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
765 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
767 /* For each slot that has a default value,
768 copy that into the slot. */
770 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
772 offset
+= sizeof (Lisp_Object
))
774 int idx
= PER_BUFFER_IDX (offset
);
777 || buffer_permanent_local_flags
[idx
] == 0))
778 /* Is -2 used anywhere? */
780 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
784 /* We split this away from generate-new-buffer, because rename-buffer
785 and set-visited-file-name ought to be able to use this to really
786 rename the buffer properly. */
788 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
790 doc
: /* Return a string that is the name of no existing buffer based on NAME.
791 If there is no live buffer named NAME, then return NAME.
792 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
793 \(starting at 2) until an unused name is found, and then return that name.
794 Optional second argument IGNORE specifies a name that is okay to use
795 \(if it is in the sequence to be tried)
796 even if a buffer with that name exists. */)
798 register Lisp_Object name
, ignore
;
800 register Lisp_Object gentemp
, tem
;
806 tem
= Fstring_equal (name
, ignore
);
809 tem
= Fget_buffer (name
);
816 sprintf (number
, "<%d>", ++count
);
817 gentemp
= concat2 (name
, build_string (number
));
818 tem
= Fstring_equal (gentemp
, ignore
);
821 tem
= Fget_buffer (gentemp
);
828 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
829 doc
: /* Return the name of BUFFER, as a string.
830 With no argument or nil as argument, return the name of the current buffer. */)
832 register Lisp_Object buffer
;
835 return current_buffer
->name
;
836 CHECK_BUFFER (buffer
);
837 return XBUFFER (buffer
)->name
;
840 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
841 doc
: /* Return name of file BUFFER is visiting, or nil if none.
842 No argument or nil as argument means use the current buffer. */)
844 register Lisp_Object buffer
;
847 return current_buffer
->filename
;
848 CHECK_BUFFER (buffer
);
849 return XBUFFER (buffer
)->filename
;
852 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
854 doc
: /* Return the base buffer of indirect buffer BUFFER.
855 If BUFFER is not indirect, return nil.
856 BUFFER defaults to the current buffer. */)
858 register Lisp_Object buffer
;
861 Lisp_Object base_buffer
;
864 base
= current_buffer
->base_buffer
;
867 CHECK_BUFFER (buffer
);
868 base
= XBUFFER (buffer
)->base_buffer
;
873 XSETBUFFER (base_buffer
, base
);
877 DEFUN ("buffer-local-value", Fbuffer_local_value
,
878 Sbuffer_local_value
, 2, 2, 0,
879 doc
: /* Return the value of VARIABLE in BUFFER.
880 If VARIABLE does not have a buffer-local binding in BUFFER, the value
881 is the default binding of the variable. */)
883 register Lisp_Object variable
;
884 register Lisp_Object buffer
;
886 register struct buffer
*buf
;
887 register Lisp_Object result
;
889 CHECK_SYMBOL (variable
);
890 CHECK_BUFFER (buffer
);
891 buf
= XBUFFER (buffer
);
893 if (SYMBOLP (variable
))
894 variable
= indirect_variable (variable
);
896 /* Look in local_var_list */
897 result
= Fassoc (variable
, buf
->local_var_alist
);
903 /* Look in special slots */
904 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
905 offset
< sizeof (struct buffer
);
906 /* sizeof EMACS_INT == sizeof Lisp_Object */
907 offset
+= (sizeof (EMACS_INT
)))
909 idx
= PER_BUFFER_IDX (offset
);
910 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
911 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
912 && EQ (PER_BUFFER_SYMBOL (offset
), variable
))
914 result
= PER_BUFFER_VALUE (buf
, offset
);
921 result
= Fdefault_value (variable
);
925 Lisp_Object valcontents
;
926 Lisp_Object current_alist_element
;
928 /* What binding is loaded right now? */
929 valcontents
= SYMBOL_VALUE (variable
);
930 current_alist_element
931 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
933 /* The value of the currently loaded binding is not
934 stored in it, but rather in the realvalue slot.
935 Store that value into the binding it belongs to
936 in case that is the one we are about to use. */
938 Fsetcdr (current_alist_element
,
939 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
941 /* Now get the (perhaps updated) value out of the binding. */
942 result
= XCDR (result
);
945 if (!EQ (result
, Qunbound
))
948 xsignal1 (Qvoid_variable
, variable
);
951 /* Return an alist of the Lisp-level buffer-local bindings of
952 buffer BUF. That is, don't include the variables maintained
953 in special slots in the buffer object. */
956 buffer_lisp_local_variables (buf
)
959 Lisp_Object result
= Qnil
;
960 register Lisp_Object tail
;
961 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
963 Lisp_Object val
, elt
;
967 /* Reference each variable in the alist in buf.
968 If inquiring about the current buffer, this gets the current values,
969 so store them into the alist so the alist is up to date.
970 If inquiring about some other buffer, this swaps out any values
971 for that buffer, making the alist up to date automatically. */
972 val
= find_symbol_value (XCAR (elt
));
973 /* Use the current buffer value only if buf is the current buffer. */
974 if (buf
!= current_buffer
)
977 /* If symbol is unbound, put just the symbol in the list. */
978 if (EQ (val
, Qunbound
))
979 result
= Fcons (XCAR (elt
), result
);
980 /* Otherwise, put (symbol . value) in the list. */
982 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
988 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
989 Sbuffer_local_variables
, 0, 1, 0,
990 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
991 Most elements look like (SYMBOL . VALUE), describing one variable.
992 For a symbol that is locally unbound, just the symbol appears in the value.
993 Note that storing new VALUEs in these elements doesn't change the variables.
994 No argument or nil as argument means use current buffer as BUFFER. */)
996 register Lisp_Object buffer
;
998 register struct buffer
*buf
;
999 register Lisp_Object result
;
1002 buf
= current_buffer
;
1005 CHECK_BUFFER (buffer
);
1006 buf
= XBUFFER (buffer
);
1009 result
= buffer_lisp_local_variables (buf
);
1011 /* Add on all the variables stored in special slots. */
1015 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
1016 offset
< sizeof (struct buffer
);
1017 /* sizeof EMACS_INT == sizeof Lisp_Object */
1018 offset
+= (sizeof (EMACS_INT
)))
1020 idx
= PER_BUFFER_IDX (offset
);
1021 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1022 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1023 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1024 PER_BUFFER_VALUE (buf
, offset
)),
1032 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1034 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1035 No argument or nil as argument means use current buffer as BUFFER. */)
1037 register Lisp_Object buffer
;
1039 register struct buffer
*buf
;
1041 buf
= current_buffer
;
1044 CHECK_BUFFER (buffer
);
1045 buf
= XBUFFER (buffer
);
1048 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1051 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1053 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1054 A non-nil FLAG means mark the buffer modified. */)
1056 register Lisp_Object flag
;
1058 register int already
;
1059 register Lisp_Object fn
;
1060 Lisp_Object buffer
, window
;
1062 #ifdef CLASH_DETECTION
1063 /* If buffer becoming modified, lock the file.
1064 If buffer becoming unmodified, unlock the file. */
1066 fn
= current_buffer
->file_truename
;
1067 /* Test buffer-file-name so that binding it to nil is effective. */
1068 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1070 already
= SAVE_MODIFF
< MODIFF
;
1071 if (!already
&& !NILP (flag
))
1073 else if (already
&& NILP (flag
))
1076 #endif /* CLASH_DETECTION */
1078 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1080 /* Set update_mode_lines only if buffer is displayed in some window.
1081 Packages like jit-lock or lazy-lock preserve a buffer's modified
1082 state by recording/restoring the state around blocks of code.
1083 Setting update_mode_lines makes redisplay consider all windows
1084 (on all frames). Stealth fontification of buffers not displayed
1085 would incur additional redisplay costs if we'd set
1086 update_modes_lines unconditionally.
1088 Ideally, I think there should be another mechanism for fontifying
1089 buffers without "modifying" buffers, or redisplay should be
1090 smarter about updating the `*' in mode lines. --gerd */
1091 XSETBUFFER (buffer
, current_buffer
);
1092 window
= Fget_buffer_window (buffer
, Qt
);
1093 if (WINDOWP (window
))
1095 ++update_mode_lines
;
1096 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1102 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1103 Srestore_buffer_modified_p
, 1, 1, 0,
1104 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1105 It is not ensured that mode lines will be updated to show the modified
1106 state of the current buffer. Use with care. */)
1110 #ifdef CLASH_DETECTION
1113 /* If buffer becoming modified, lock the file.
1114 If buffer becoming unmodified, unlock the file. */
1116 fn
= current_buffer
->file_truename
;
1117 /* Test buffer-file-name so that binding it to nil is effective. */
1118 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1120 int already
= SAVE_MODIFF
< MODIFF
;
1121 if (!already
&& !NILP (flag
))
1123 else if (already
&& NILP (flag
))
1126 #endif /* CLASH_DETECTION */
1128 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1132 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1134 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1135 Each buffer has a tick counter which is incremented each time the text in
1136 that buffer is changed. It wraps around occasionally.
1137 No argument or nil as argument means use current buffer as BUFFER. */)
1139 register Lisp_Object buffer
;
1141 register struct buffer
*buf
;
1143 buf
= current_buffer
;
1146 CHECK_BUFFER (buffer
);
1147 buf
= XBUFFER (buffer
);
1150 return make_number (BUF_MODIFF (buf
));
1153 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1154 Sbuffer_chars_modified_tick
, 0, 1, 0,
1155 doc
: /* Return BUFFER's character-change tick counter.
1156 Each buffer has a character-change tick counter, which is set to the
1157 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1158 time text in that buffer is inserted or deleted. By comparing the
1159 values returned by two individual calls of `buffer-chars-modified-tick',
1160 you can tell whether a character change occurred in that buffer in
1161 between these calls. No argument or nil as argument means use current
1162 buffer as BUFFER. */)
1164 register Lisp_Object buffer
;
1166 register struct buffer
*buf
;
1168 buf
= current_buffer
;
1171 CHECK_BUFFER (buffer
);
1172 buf
= XBUFFER (buffer
);
1175 return make_number (BUF_CHARS_MODIFF (buf
));
1178 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1179 "sRename buffer (to new name): \nP",
1180 doc
: /* Change current buffer's name to NEWNAME (a string).
1181 If second arg UNIQUE is nil or omitted, it is an error if a
1182 buffer named NEWNAME already exists.
1183 If UNIQUE is non-nil, come up with a new name using
1184 `generate-new-buffer-name'.
1185 Interactively, you can set UNIQUE with a prefix argument.
1186 We return the name we actually gave the buffer.
1187 This does not change the name of the visited file (if any). */)
1189 register Lisp_Object newname
, unique
;
1191 register Lisp_Object tem
, buf
;
1193 CHECK_STRING (newname
);
1195 if (SCHARS (newname
) == 0)
1196 error ("Empty string is invalid as a buffer name");
1198 tem
= Fget_buffer (newname
);
1201 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1202 rename the buffer automatically so you can create another
1203 with the original name. It makes UNIQUE equivalent to
1204 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1205 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1206 return current_buffer
->name
;
1208 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1210 error ("Buffer name `%s' is in use", SDATA (newname
));
1213 current_buffer
->name
= newname
;
1215 /* Catch redisplay's attention. Unless we do this, the mode lines for
1216 any windows displaying current_buffer will stay unchanged. */
1217 update_mode_lines
++;
1219 XSETBUFFER (buf
, current_buffer
);
1220 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1221 if (NILP (current_buffer
->filename
)
1222 && !NILP (current_buffer
->auto_save_file_name
))
1223 call0 (intern ("rename-auto-save-file"));
1224 /* Refetch since that last call may have done GC. */
1225 return current_buffer
->name
;
1228 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1229 doc
: /* Return most recently selected buffer other than BUFFER.
1230 Buffers not visible in windows are preferred to visible buffers,
1231 unless optional second argument VISIBLE-OK is non-nil.
1232 If the optional third argument FRAME is non-nil, use that frame's
1233 buffer list instead of the selected frame's buffer list.
1234 If no other buffer exists, the buffer `*scratch*' is returned.
1235 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1236 (buffer
, visible_ok
, frame
)
1237 register Lisp_Object buffer
, visible_ok
, frame
;
1239 Lisp_Object
Fset_buffer_major_mode ();
1240 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1244 frame
= selected_frame
;
1246 tail
= Vbuffer_alist
;
1247 pred
= frame_buffer_predicate (frame
);
1249 /* Consider buffers that have been seen in the selected frame
1250 before other buffers. */
1252 tem
= frame_buffer_list (frame
);
1256 if (BUFFERP (XCAR (tem
)))
1257 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1260 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1262 for (; CONSP (tail
); tail
= XCDR (tail
))
1264 buf
= Fcdr (XCAR (tail
));
1265 if (EQ (buf
, buffer
))
1269 if (NILP (XBUFFER (buf
)->name
))
1271 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1273 /* If the selected frame has a buffer_predicate,
1274 disregard buffers that don't fit the predicate. */
1277 tem
= call1 (pred
, buf
);
1282 if (NILP (visible_ok
))
1283 tem
= Fget_buffer_window (buf
, Qvisible
);
1288 if (NILP (notsogood
))
1291 if (!NILP (notsogood
))
1293 buf
= Fget_buffer (build_string ("*scratch*"));
1296 buf
= Fget_buffer_create (build_string ("*scratch*"));
1297 Fset_buffer_major_mode (buf
);
1302 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1304 doc
: /* Start keeping undo information for buffer BUFFER.
1305 No argument or nil as argument means do this for the current buffer. */)
1307 register Lisp_Object buffer
;
1309 Lisp_Object real_buffer
;
1312 XSETBUFFER (real_buffer
, current_buffer
);
1315 real_buffer
= Fget_buffer (buffer
);
1316 if (NILP (real_buffer
))
1320 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1321 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1327 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1328 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1329 The buffer being killed will be current while the hook is running.\n\
1332 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1333 doc
: /* Kill the buffer BUFFER.
1334 The argument may be a buffer or the name of a buffer.
1335 With a nil argument, kill the current buffer.
1337 Value is t if the buffer is actually killed, nil otherwise.
1339 The functions in `kill-buffer-query-functions' are called with BUFFER as
1340 the current buffer. If any of them returns nil, the buffer is not killed.
1342 The hook `kill-buffer-hook' is run before the buffer is actually killed.
1343 The buffer being killed will be current while the hook is running.
1345 Any processes that have this buffer as the `process-buffer' are killed
1351 register struct buffer
*b
;
1352 register Lisp_Object tem
;
1353 register struct Lisp_Marker
*m
;
1354 struct gcpro gcpro1
;
1357 buf
= Fcurrent_buffer ();
1359 buf
= Fget_buffer (buffer
);
1365 /* Avoid trouble for buffer already dead. */
1369 /* Query if the buffer is still modified. */
1370 if (INTERACTIVE
&& !NILP (b
->filename
)
1371 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1374 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1375 b
->name
, make_number (0)));
1381 /* Run hooks with the buffer to be killed the current buffer. */
1383 int count
= SPECPDL_INDEX ();
1384 Lisp_Object arglist
[1];
1386 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1387 set_buffer_internal (b
);
1389 /* First run the query functions; if any query is answered no,
1390 don't kill the buffer. */
1391 arglist
[0] = Qkill_buffer_query_functions
;
1392 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1394 return unbind_to (count
, Qnil
);
1396 /* Then run the hooks. */
1397 Frun_hooks (1, &Qkill_buffer_hook
);
1398 unbind_to (count
, Qnil
);
1401 /* We have no more questions to ask. Verify that it is valid
1402 to kill the buffer. This must be done after the questions
1403 since anything can happen within do_yes_or_no_p. */
1405 /* Don't kill the minibuffer now current. */
1406 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1412 /* When we kill a base buffer, kill all its indirect buffers.
1413 We do it at this stage so nothing terrible happens if they
1414 ask questions or their hooks get errors. */
1415 if (! b
->base_buffer
)
1417 struct buffer
*other
;
1421 for (other
= all_buffers
; other
; other
= other
->next
)
1422 /* all_buffers contains dead buffers too;
1423 don't re-kill them. */
1424 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1427 XSETBUFFER (buf
, other
);
1434 /* Make this buffer not be current.
1435 In the process, notice if this is the sole visible buffer
1436 and give up if so. */
1437 if (b
== current_buffer
)
1439 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1441 if (b
== current_buffer
)
1445 /* Notice if the buffer to kill is the sole visible buffer
1446 when we're currently in the mini-buffer, and give up if so. */
1447 XSETBUFFER (tem
, current_buffer
);
1448 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1450 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1455 /* Now there is no question: we can kill the buffer. */
1457 #ifdef CLASH_DETECTION
1458 /* Unlock this buffer's file, if it is locked. */
1460 #endif /* CLASH_DETECTION */
1462 kill_buffer_processes (buf
);
1463 clear_charpos_cache (b
);
1465 tem
= Vinhibit_quit
;
1467 replace_buffer_in_all_windows (buf
);
1468 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1469 frames_discard_buffer (buf
);
1470 Vinhibit_quit
= tem
;
1472 /* Delete any auto-save file, if we saved it in this session.
1473 But not if the buffer is modified. */
1474 if (STRINGP (b
->auto_save_file_name
)
1475 && b
->auto_save_modified
!= 0
1476 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1477 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1478 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1481 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1483 internal_delete_file (b
->auto_save_file_name
);
1488 /* Unchain all markers that belong to this indirect buffer.
1489 Don't unchain the markers that belong to the base buffer
1490 or its other indirect buffers. */
1491 for (m
= BUF_MARKERS (b
); m
; )
1493 struct Lisp_Marker
*next
= m
->next
;
1501 /* Unchain all markers of this buffer and its indirect buffers.
1502 and leave them pointing nowhere. */
1503 for (m
= BUF_MARKERS (b
); m
; )
1505 struct Lisp_Marker
*next
= m
->next
;
1510 BUF_MARKERS (b
) = NULL
;
1511 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1513 /* Perhaps we should explicitly free the interval tree here... */
1516 /* Reset the local variables, so that this buffer's local values
1517 won't be protected from GC. They would be protected
1518 if they happened to remain encached in their symbols.
1519 This gets rid of them for certain. */
1520 swap_out_buffer_local_variables (b
);
1521 reset_buffer_local_variables (b
, 1);
1526 if (! b
->base_buffer
)
1527 free_buffer_text (b
);
1529 if (b
->newline_cache
)
1531 free_region_cache (b
->newline_cache
);
1532 b
->newline_cache
= 0;
1534 if (b
->width_run_cache
)
1536 free_region_cache (b
->width_run_cache
);
1537 b
->width_run_cache
= 0;
1539 b
->width_table
= Qnil
;
1541 b
->undo_list
= Qnil
;
1546 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1547 we do this each time BUF is selected visibly, the more recently
1548 selected buffers are always closer to the front of the list. This
1549 means that other_buffer is more likely to choose a relevant buffer. */
1555 register Lisp_Object link
, prev
;
1557 frame
= selected_frame
;
1560 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1562 if (EQ (XCDR (XCAR (link
)), buf
))
1567 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1568 we cannot use Fdelq itself here because it allows quitting. */
1571 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1573 XSETCDR (prev
, XCDR (XCDR (prev
)));
1575 XSETCDR (link
, Vbuffer_alist
);
1576 Vbuffer_alist
= link
;
1578 /* Now move this buffer to the front of frame_buffer_list also. */
1581 for (link
= frame_buffer_list (frame
); CONSP (link
);
1584 if (EQ (XCAR (link
), buf
))
1589 /* Effectively do delq. */
1594 set_frame_buffer_list (frame
,
1595 XCDR (frame_buffer_list (frame
)));
1597 XSETCDR (prev
, XCDR (XCDR (prev
)));
1599 XSETCDR (link
, frame_buffer_list (frame
));
1600 set_frame_buffer_list (frame
, link
);
1603 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1606 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1607 doc
: /* Set an appropriate major mode for BUFFER.
1608 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1609 according to `default-major-mode'.
1610 Use this function before selecting the buffer, since it may need to inspect
1611 the current buffer's major mode. */)
1616 Lisp_Object function
;
1618 if (STRINGP (XBUFFER (buffer
)->name
)
1619 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1620 function
= find_symbol_value (intern ("initial-major-mode"));
1623 function
= buffer_defaults
.major_mode
;
1625 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1626 function
= current_buffer
->major_mode
;
1629 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1632 count
= SPECPDL_INDEX ();
1634 /* To select a nonfundamental mode,
1635 select the buffer temporarily and then call the mode function. */
1637 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1639 Fset_buffer (buffer
);
1642 return unbind_to (count
, Qnil
);
1645 /* If switching buffers in WINDOW would be an error, return
1646 a C string saying what the error would be. */
1649 no_switch_window (window
)
1653 if (EQ (minibuf_window
, window
))
1654 return "Cannot switch buffers in minibuffer window";
1655 tem
= Fwindow_dedicated_p (window
);
1657 return "Cannot switch buffers in a dedicated window";
1661 /* Switch to buffer BUFFER in the selected window.
1662 If NORECORD is non-nil, don't call record_buffer. */
1665 switch_to_buffer_1 (buffer
, norecord
)
1666 Lisp_Object buffer
, norecord
;
1668 register Lisp_Object buf
;
1671 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1674 buf
= Fget_buffer (buffer
);
1677 buf
= Fget_buffer_create (buffer
);
1678 Fset_buffer_major_mode (buf
);
1682 if (NILP (norecord
))
1683 record_buffer (buf
);
1685 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1686 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1693 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1694 doc
: /* Select buffer BUFFER in the current window.
1695 If BUFFER does not identify an existing buffer,
1696 then this function creates a buffer with that name.
1698 When called from Lisp, BUFFER may be a buffer, a string \(a buffer name),
1699 or nil. If BUFFER is nil, then this function chooses a buffer
1700 using `other-buffer'.
1701 Optional second arg NORECORD non-nil means
1702 do not put this buffer at the front of the list of recently selected ones.
1703 This function returns the buffer it switched to.
1705 WARNING: This is NOT the way to work on another buffer temporarily
1706 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1707 the window-buffer correspondences. */)
1709 Lisp_Object buffer
, norecord
;
1713 if (EQ (buffer
, Fwindow_buffer (selected_window
)))
1715 /* Basically a NOP. Avoid signalling an error in the case where
1716 the selected window is dedicated, or a minibuffer. */
1718 /* But do put this buffer at the front of the buffer list,
1719 unless that has been inhibited. Note that even if
1720 BUFFER is at the front of the main buffer-list already,
1721 we still want to move it to the front of the frame's buffer list. */
1722 if (NILP (norecord
))
1723 record_buffer (buffer
);
1724 return Fset_buffer (buffer
);
1727 err
= no_switch_window (selected_window
);
1728 if (err
) error (err
);
1730 return switch_to_buffer_1 (buffer
, norecord
);
1733 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1734 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1735 BUFFER may be a buffer, a string \(a buffer name), or nil.
1736 If BUFFER is a string which is not the name of an existing buffer,
1737 then this function creates a buffer with that name.
1738 If BUFFER is nil, then it chooses some other buffer.
1739 If `pop-up-windows' is non-nil, windows can be split to do this.
1740 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1741 window even if BUFFER is already visible in the selected window,
1742 and ignore `same-window-regexps' and `same-window-buffer-names'.
1743 This function returns the buffer it switched to.
1744 This uses the function `display-buffer' as a subroutine; see the documentation
1745 of `display-buffer' for additional customization information.
1747 Optional third arg NORECORD non-nil means
1748 do not put this buffer at the front of the list of recently selected ones. */)
1749 (buffer
, other_window
, norecord
)
1750 Lisp_Object buffer
, other_window
, norecord
;
1752 register Lisp_Object buf
;
1754 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1757 buf
= Fget_buffer (buffer
);
1760 buf
= Fget_buffer_create (buffer
);
1761 Fset_buffer_major_mode (buf
);
1765 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
), norecord
);
1769 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1770 doc
: /* Return the current buffer as a Lisp object. */)
1773 register Lisp_Object buf
;
1774 XSETBUFFER (buf
, current_buffer
);
1778 /* Set the current buffer to B.
1780 We previously set windows_or_buffers_changed here to invalidate
1781 global unchanged information in beg_unchanged and end_unchanged.
1782 This is no longer necessary because we now compute unchanged
1783 information on a buffer-basis. Every action affecting other
1784 windows than the selected one requires a select_window at some
1785 time, and that increments windows_or_buffers_changed. */
1788 set_buffer_internal (b
)
1789 register struct buffer
*b
;
1791 if (current_buffer
!= b
)
1792 set_buffer_internal_1 (b
);
1795 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1796 This is used by redisplay. */
1799 set_buffer_internal_1 (b
)
1800 register struct buffer
*b
;
1802 register struct buffer
*old_buf
;
1803 register Lisp_Object tail
, valcontents
;
1806 #ifdef USE_MMAP_FOR_BUFFERS
1807 if (b
->text
->beg
== NULL
)
1808 enlarge_buffer_text (b
, 0);
1809 #endif /* USE_MMAP_FOR_BUFFERS */
1811 if (current_buffer
== b
)
1814 old_buf
= current_buffer
;
1816 last_known_column_point
= -1; /* invalidate indentation cache */
1820 /* Put the undo list back in the base buffer, so that it appears
1821 that an indirect buffer shares the undo list of its base. */
1822 if (old_buf
->base_buffer
)
1823 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1825 /* If the old current buffer has markers to record PT, BEGV and ZV
1826 when it is not current, update them now. */
1827 if (! NILP (old_buf
->pt_marker
))
1830 XSETBUFFER (obuf
, old_buf
);
1831 set_marker_both (old_buf
->pt_marker
, obuf
,
1832 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1834 if (! NILP (old_buf
->begv_marker
))
1837 XSETBUFFER (obuf
, old_buf
);
1838 set_marker_both (old_buf
->begv_marker
, obuf
,
1839 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1841 if (! NILP (old_buf
->zv_marker
))
1844 XSETBUFFER (obuf
, old_buf
);
1845 set_marker_both (old_buf
->zv_marker
, obuf
,
1846 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1850 /* Get the undo list from the base buffer, so that it appears
1851 that an indirect buffer shares the undo list of its base. */
1853 b
->undo_list
= b
->base_buffer
->undo_list
;
1855 /* If the new current buffer has markers to record PT, BEGV and ZV
1856 when it is not current, fetch them now. */
1857 if (! NILP (b
->pt_marker
))
1859 BUF_PT (b
) = marker_position (b
->pt_marker
);
1860 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1862 if (! NILP (b
->begv_marker
))
1864 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1865 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1867 if (! NILP (b
->zv_marker
))
1869 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1870 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1873 /* Look down buffer's list of local Lisp variables
1874 to find and update any that forward into C variables. */
1876 for (tail
= b
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1878 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1879 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1880 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1881 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1882 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1883 /* Just reference the variable
1884 to cause it to become set for this buffer. */
1885 Fsymbol_value (XCAR (XCAR (tail
)));
1888 /* Do the same with any others that were local to the previous buffer */
1891 for (tail
= old_buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1893 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1894 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1895 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1896 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1897 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1898 /* Just reference the variable
1899 to cause it to become set for this buffer. */
1900 Fsymbol_value (XCAR (XCAR (tail
)));
1904 /* Switch to buffer B temporarily for redisplay purposes.
1905 This avoids certain things that don't need to be done within redisplay. */
1911 register struct buffer
*old_buf
;
1913 if (current_buffer
== b
)
1916 old_buf
= current_buffer
;
1921 /* If the old current buffer has markers to record PT, BEGV and ZV
1922 when it is not current, update them now. */
1923 if (! NILP (old_buf
->pt_marker
))
1926 XSETBUFFER (obuf
, old_buf
);
1927 set_marker_both (old_buf
->pt_marker
, obuf
,
1928 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1930 if (! NILP (old_buf
->begv_marker
))
1933 XSETBUFFER (obuf
, old_buf
);
1934 set_marker_both (old_buf
->begv_marker
, obuf
,
1935 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1937 if (! NILP (old_buf
->zv_marker
))
1940 XSETBUFFER (obuf
, old_buf
);
1941 set_marker_both (old_buf
->zv_marker
, obuf
,
1942 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1946 /* If the new current buffer has markers to record PT, BEGV and ZV
1947 when it is not current, fetch them now. */
1948 if (! NILP (b
->pt_marker
))
1950 BUF_PT (b
) = marker_position (b
->pt_marker
);
1951 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1953 if (! NILP (b
->begv_marker
))
1955 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1956 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1958 if (! NILP (b
->zv_marker
))
1960 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1961 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1965 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1966 doc
: /* Make the buffer BUFFER current for editing operations.
1967 BUFFER may be a buffer or the name of an existing buffer.
1968 See also `save-excursion' when you want to make a buffer current temporarily.
1969 This function does not display the buffer, so its effect ends
1970 when the current command terminates.
1971 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1973 register Lisp_Object buffer
;
1975 register Lisp_Object buf
;
1976 buf
= Fget_buffer (buffer
);
1979 if (NILP (XBUFFER (buf
)->name
))
1980 error ("Selecting deleted buffer");
1981 set_buffer_internal (XBUFFER (buf
));
1985 /* Set the current buffer to BUFFER provided it is alive. */
1988 set_buffer_if_live (buffer
)
1991 if (! NILP (XBUFFER (buffer
)->name
))
1992 Fset_buffer (buffer
);
1996 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1997 Sbarf_if_buffer_read_only
, 0, 0, 0,
1998 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
2001 if (!NILP (current_buffer
->read_only
)
2002 && NILP (Vinhibit_read_only
))
2003 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
2007 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
2008 doc
: /* Put BUFFER at the end of the list of all buffers.
2009 There it is the least likely candidate for `other-buffer' to return;
2010 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
2011 You can specify a buffer name as BUFFER, or an actual buffer object.
2012 If BUFFER is nil or omitted, bury the current buffer.
2013 Also, if BUFFER is nil or omitted, remove the current buffer from the
2014 selected window if it is displayed there. */)
2016 register Lisp_Object buffer
;
2018 /* Figure out what buffer we're going to bury. */
2022 XSETBUFFER (buffer
, current_buffer
);
2024 tem
= Fwindow_buffer (selected_window
);
2025 /* If we're burying the current buffer, unshow it. */
2026 if (EQ (buffer
, tem
))
2028 if (NILP (Fwindow_dedicated_p (selected_window
)))
2029 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
2030 else if (NILP (XWINDOW (selected_window
)->parent
))
2031 Ficonify_frame (Fwindow_frame (selected_window
));
2033 Fdelete_window (selected_window
);
2040 buf1
= Fget_buffer (buffer
);
2046 /* Move buffer to the end of the buffer list. Do nothing if the
2047 buffer is killed. */
2048 if (!NILP (XBUFFER (buffer
)->name
))
2050 Lisp_Object aelt
, link
;
2052 aelt
= Frassq (buffer
, Vbuffer_alist
);
2053 link
= Fmemq (aelt
, Vbuffer_alist
);
2054 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
2055 XSETCDR (link
, Qnil
);
2056 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
2058 /* Removing BUFFER from frame-specific lists
2059 has the effect of putting BUFFER at the end
2060 of the combined list in each frame. */
2061 frames_discard_buffer (buffer
);
2067 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2068 doc
: /* Delete the entire contents of the current buffer.
2069 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2070 so the buffer is truly empty after this. */)
2077 current_buffer
->last_window_start
= 1;
2078 /* Prevent warnings, or suspension of auto saving, that would happen
2079 if future size is less than past size. Use of erase-buffer
2080 implies that the future text is not really related to the past text. */
2081 XSETFASTINT (current_buffer
->save_length
, 0);
2086 validate_region (b
, e
)
2087 register Lisp_Object
*b
, *e
;
2089 CHECK_NUMBER_COERCE_MARKER (*b
);
2090 CHECK_NUMBER_COERCE_MARKER (*e
);
2092 if (XINT (*b
) > XINT (*e
))
2095 tem
= *b
; *b
= *e
; *e
= tem
;
2098 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2099 && XINT (*e
) <= ZV
))
2100 args_out_of_range (*b
, *e
);
2103 /* Advance BYTE_POS up to a character boundary
2104 and return the adjusted position. */
2107 advance_to_char_boundary (byte_pos
)
2112 if (byte_pos
== BEG
)
2113 /* Beginning of buffer is always a character boundary. */
2116 c
= FETCH_BYTE (byte_pos
);
2117 if (! CHAR_HEAD_P (c
))
2119 /* We should advance BYTE_POS only when C is a constituent of a
2120 multibyte sequence. */
2121 int orig_byte_pos
= byte_pos
;
2126 c
= FETCH_BYTE (byte_pos
);
2128 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2130 if (byte_pos
< orig_byte_pos
)
2131 byte_pos
= orig_byte_pos
;
2132 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2133 surely advance to the correct character boundary. If C is
2134 not, BYTE_POS was unchanged. */
2140 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2142 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2143 If FLAG is t, this makes the buffer a multibyte buffer.
2144 If FLAG is nil, this makes the buffer a single-byte buffer.
2145 The buffer contents remain unchanged as a sequence of bytes
2146 but the contents viewed as characters do change.
2147 If the multibyte flag was really changed, undo information of the
2148 current buffer is cleared. */)
2152 struct Lisp_Marker
*tail
, *markers
;
2153 struct buffer
*other
;
2155 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2156 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2157 Lisp_Object old_undo
= current_buffer
->undo_list
;
2158 struct gcpro gcpro1
;
2160 if (current_buffer
->base_buffer
)
2161 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2163 /* Do nothing if nothing actually changes. */
2164 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2169 /* Don't record these buffer changes. We will put a special undo entry
2171 current_buffer
->undo_list
= Qt
;
2173 /* If the cached position is for this buffer, clear it out. */
2174 clear_charpos_cache (current_buffer
);
2177 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2179 begv
= BEGV
, zv
= ZV
;
2189 /* Do this first, so it can use CHAR_TO_BYTE
2190 to calculate the old correspondences. */
2191 set_intervals_multibyte (0);
2193 current_buffer
->enable_multibyte_characters
= Qnil
;
2199 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2202 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2203 tail
->charpos
= tail
->bytepos
;
2205 /* Convert multibyte form of 8-bit characters to unibyte. */
2220 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2221 p
+= bytes
, pos
+= bytes
;
2224 c
= STRING_CHAR (p
, stop
- pos
);
2225 /* Delete all bytes for this 8-bit character but the
2226 last one, and change the last one to the charcter
2229 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2241 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2249 /* Be sure not to have a multibyte sequence striding over the GAP.
2250 Ex: We change this: "...abc\201 _GAP_ \241def..."
2251 to: "...abc _GAP_ \201\241def..." */
2253 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2254 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2256 unsigned char *p
= GPT_ADDR
- 1;
2258 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2259 if (BASE_LEADING_CODE_P (*p
))
2261 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2263 move_gap_both (new_gpt
, new_gpt
);
2267 /* Make the buffer contents valid as multibyte by converting
2268 8-bit characters to multibyte form. */
2284 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2285 p
+= bytes
, pos
+= bytes
;
2288 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2290 bytes
= CHAR_STRING (*p
, tmp
);
2292 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2294 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2295 /* Now the gap is after the just inserted data. */
2312 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2314 /* Do this first, so that chars_in_text asks the right question.
2315 set_intervals_multibyte needs it too. */
2316 current_buffer
->enable_multibyte_characters
= Qt
;
2318 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2319 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2321 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2323 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2324 if (BEGV_BYTE
> GPT_BYTE
)
2325 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2327 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2329 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2330 if (ZV_BYTE
> GPT_BYTE
)
2331 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2333 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2336 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2339 if (pt_byte
> GPT_BYTE
)
2340 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2342 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2343 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2346 tail
= markers
= BUF_MARKERS (current_buffer
);
2348 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2349 getting confused by the markers that have not yet been updated.
2350 It is also a signal that it should never create a marker. */
2351 BUF_MARKERS (current_buffer
) = NULL
;
2353 for (; tail
; tail
= tail
->next
)
2355 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2356 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2359 /* Make sure no markers were put on the chain
2360 while the chain value was incorrect. */
2361 if (BUF_MARKERS (current_buffer
))
2364 BUF_MARKERS (current_buffer
) = markers
;
2366 /* Do this last, so it can calculate the new correspondences
2367 between chars and bytes. */
2368 set_intervals_multibyte (1);
2371 if (!EQ (old_undo
, Qt
))
2373 /* Represent all the above changes by a special undo entry. */
2374 extern Lisp_Object Qapply
;
2375 current_buffer
->undo_list
= Fcons (list3 (Qapply
,
2376 intern ("set-buffer-multibyte"),
2377 NILP (flag
) ? Qt
: Qnil
),
2383 /* Changing the multibyteness of a buffer means that all windows
2384 showing that buffer must be updated thoroughly. */
2385 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2386 ++windows_or_buffers_changed
;
2388 /* Copy this buffer's new multibyte status
2389 into all of its indirect buffers. */
2390 for (other
= all_buffers
; other
; other
= other
->next
)
2391 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2393 other
->enable_multibyte_characters
2394 = current_buffer
->enable_multibyte_characters
;
2395 other
->prevent_redisplay_optimizations_p
= 1;
2398 /* Restore the modifiedness of the buffer. */
2399 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2400 Fset_buffer_modified_p (Qnil
);
2403 /* Update coding systems of this buffer's process (if any). */
2405 Lisp_Object process
;
2407 process
= Fget_buffer_process (Fcurrent_buffer ());
2408 if (PROCESSP (process
))
2409 setup_process_coding_systems (process
);
2411 #endif /* subprocesses */
2416 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2418 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2419 Most local variable bindings are eliminated so that the default values
2420 become effective once more. Also, the syntax table is set from
2421 `standard-syntax-table', the local keymap is set to nil,
2422 and the abbrev table from `fundamental-mode-abbrev-table'.
2423 This function also forces redisplay of the mode line.
2425 Every function to select a new major mode starts by
2426 calling this function.
2428 As a special exception, local variables whose names have
2429 a non-nil `permanent-local' property are not eliminated by this function.
2431 The first thing this function does is run
2432 the normal hook `change-major-mode-hook'. */)
2435 register Lisp_Object alist
, sym
, tem
;
2438 if (!NILP (Vrun_hooks
))
2439 call1 (Vrun_hooks
, Qchange_major_mode_hook
);
2440 oalist
= current_buffer
->local_var_alist
;
2442 /* Make sure none of the bindings in oalist
2443 remain swapped in, in their symbols. */
2445 swap_out_buffer_local_variables (current_buffer
);
2447 /* Actually eliminate all local bindings of this buffer. */
2449 reset_buffer_local_variables (current_buffer
, 0);
2451 /* Any which are supposed to be permanent,
2452 make local again, with the same values they had. */
2454 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2456 sym
= XCAR (XCAR (alist
));
2457 tem
= Fget (sym
, Qpermanent_local
);
2460 Fmake_local_variable (sym
);
2461 Fset (sym
, XCDR (XCAR (alist
)));
2465 /* Force mode-line redisplay. Useful here because all major mode
2466 commands call this function. */
2467 update_mode_lines
++;
2472 /* Make sure no local variables remain set up with buffer B
2473 for their current values. */
2476 swap_out_buffer_local_variables (b
)
2479 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2481 XSETBUFFER (buffer
, b
);
2482 oalist
= b
->local_var_alist
;
2484 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2486 sym
= XCAR (XCAR (alist
));
2488 /* Need not do anything if some other buffer's binding is now encached. */
2489 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2490 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2492 /* Symbol is set up for this buffer's old local value.
2493 Set it up for the current buffer with the default value. */
2495 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2496 /* Store the symbol's current value into the alist entry
2497 it is currently set up for. This is so that, if the
2498 local is marked permanent, and we make it local again
2499 later in Fkill_all_local_variables, we don't lose the value. */
2500 XSETCDR (XCAR (tem
),
2501 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2502 /* Switch to the symbol's default-value alist entry. */
2504 /* Mark it as current for buffer B. */
2505 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2506 /* Store the current value into any forwarding in the symbol. */
2507 store_symval_forwarding (sym
,
2508 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2514 /* Find all the overlays in the current buffer that contain position POS.
2515 Return the number found, and store them in a vector in *VEC_PTR.
2516 Store in *LEN_PTR the size allocated for the vector.
2517 Store in *NEXT_PTR the next position after POS where an overlay starts,
2518 or ZV if there are no more overlays between POS and ZV.
2519 Store in *PREV_PTR the previous position before POS where an overlay ends,
2520 or where an overlay starts which ends at or after POS;
2521 or BEGV if there are no such overlays from BEGV to POS.
2522 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2524 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2525 when this function is called.
2527 If EXTEND is non-zero, we make the vector bigger if necessary.
2528 If EXTEND is zero, we never extend the vector,
2529 and we store only as many overlays as will fit.
2530 But we still return the total number of overlays.
2532 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2533 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2534 default (BEGV or ZV). */
2537 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2540 Lisp_Object
**vec_ptr
;
2546 Lisp_Object overlay
, start
, end
;
2547 struct Lisp_Overlay
*tail
;
2550 Lisp_Object
*vec
= *vec_ptr
;
2553 int inhibit_storing
= 0;
2555 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2557 int startpos
, endpos
;
2559 XSETMISC (overlay
, tail
);
2561 start
= OVERLAY_START (overlay
);
2562 end
= OVERLAY_END (overlay
);
2563 endpos
= OVERLAY_POSITION (end
);
2570 startpos
= OVERLAY_POSITION (start
);
2571 /* This one ends at or after POS
2572 so its start counts for PREV_PTR if it's before POS. */
2573 if (prev
< startpos
&& startpos
< pos
)
2577 if (startpos
<= pos
)
2581 /* The supplied vector is full.
2582 Either make it bigger, or don't store any more in it. */
2585 /* Make it work with an initial len == 0. */
2590 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2594 inhibit_storing
= 1;
2597 if (!inhibit_storing
)
2599 /* Keep counting overlays even if we can't return them all. */
2602 else if (startpos
< next
)
2606 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2608 int startpos
, endpos
;
2610 XSETMISC (overlay
, tail
);
2612 start
= OVERLAY_START (overlay
);
2613 end
= OVERLAY_END (overlay
);
2614 startpos
= OVERLAY_POSITION (start
);
2617 if (startpos
< next
)
2621 endpos
= OVERLAY_POSITION (end
);
2628 /* Make it work with an initial len == 0. */
2633 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2637 inhibit_storing
= 1;
2640 if (!inhibit_storing
)
2644 if (startpos
< pos
&& startpos
> prev
)
2647 else if (endpos
< pos
&& endpos
> prev
)
2649 else if (endpos
== pos
&& startpos
> prev
2650 && (!change_req
|| startpos
< pos
))
2661 /* Find all the overlays in the current buffer that overlap the range BEG-END
2662 or are empty at BEG.
2664 Return the number found, and store them in a vector in *VEC_PTR.
2665 Store in *LEN_PTR the size allocated for the vector.
2666 Store in *NEXT_PTR the next position after POS where an overlay starts,
2667 or ZV if there are no more overlays.
2668 Store in *PREV_PTR the previous position before POS where an overlay ends,
2669 or BEGV if there are no previous overlays.
2670 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2672 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2673 when this function is called.
2675 If EXTEND is non-zero, we make the vector bigger if necessary.
2676 If EXTEND is zero, we never extend the vector,
2677 and we store only as many overlays as will fit.
2678 But we still return the total number of overlays. */
2681 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2684 Lisp_Object
**vec_ptr
;
2689 Lisp_Object overlay
, ostart
, oend
;
2690 struct Lisp_Overlay
*tail
;
2693 Lisp_Object
*vec
= *vec_ptr
;
2696 int inhibit_storing
= 0;
2698 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2700 int startpos
, endpos
;
2702 XSETMISC (overlay
, tail
);
2704 ostart
= OVERLAY_START (overlay
);
2705 oend
= OVERLAY_END (overlay
);
2706 endpos
= OVERLAY_POSITION (oend
);
2713 startpos
= OVERLAY_POSITION (ostart
);
2714 /* Count an interval if it either overlaps the range
2715 or is empty at the start of the range. */
2716 if ((beg
< endpos
&& startpos
< end
)
2717 || (startpos
== endpos
&& beg
== endpos
))
2721 /* The supplied vector is full.
2722 Either make it bigger, or don't store any more in it. */
2725 /* Make it work with an initial len == 0. */
2730 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2734 inhibit_storing
= 1;
2737 if (!inhibit_storing
)
2739 /* Keep counting overlays even if we can't return them all. */
2742 else if (startpos
< next
)
2746 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2748 int startpos
, endpos
;
2750 XSETMISC (overlay
, tail
);
2752 ostart
= OVERLAY_START (overlay
);
2753 oend
= OVERLAY_END (overlay
);
2754 startpos
= OVERLAY_POSITION (ostart
);
2757 if (startpos
< next
)
2761 endpos
= OVERLAY_POSITION (oend
);
2762 /* Count an interval if it either overlaps the range
2763 or is empty at the start of the range. */
2764 if ((beg
< endpos
&& startpos
< end
)
2765 || (startpos
== endpos
&& beg
== endpos
))
2771 /* Make it work with an initial len == 0. */
2776 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2780 inhibit_storing
= 1;
2783 if (!inhibit_storing
)
2787 else if (endpos
< beg
&& endpos
> prev
)
2799 /* Return non-zero if there exists an overlay with a non-nil
2800 `mouse-face' property overlapping OVERLAY. */
2803 mouse_face_overlay_overlaps (overlay
)
2804 Lisp_Object overlay
;
2806 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2807 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2809 Lisp_Object
*v
, tem
;
2812 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2813 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2816 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2817 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2820 for (i
= 0; i
< n
; ++i
)
2821 if (!EQ (v
[i
], overlay
)
2822 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2831 /* Fast function to just test if we're at an overlay boundary. */
2833 overlay_touches_p (pos
)
2836 Lisp_Object overlay
;
2837 struct Lisp_Overlay
*tail
;
2839 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2843 XSETMISC (overlay
,tail
);
2844 if (!GC_OVERLAYP (overlay
))
2847 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2850 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2854 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2858 XSETMISC (overlay
, tail
);
2859 if (!GC_OVERLAYP (overlay
))
2862 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2865 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2873 Lisp_Object overlay
;
2879 compare_overlays (v1
, v2
)
2880 const void *v1
, *v2
;
2882 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2883 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2884 if (s1
->priority
!= s2
->priority
)
2885 return s1
->priority
- s2
->priority
;
2886 if (s1
->beg
!= s2
->beg
)
2887 return s1
->beg
- s2
->beg
;
2888 if (s1
->end
!= s2
->end
)
2889 return s2
->end
- s1
->end
;
2893 /* Sort an array of overlays by priority. The array is modified in place.
2894 The return value is the new size; this may be smaller than the original
2895 size if some of the overlays were invalid or were window-specific. */
2897 sort_overlays (overlay_vec
, noverlays
, w
)
2898 Lisp_Object
*overlay_vec
;
2903 struct sortvec
*sortvec
;
2904 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2906 /* Put the valid and relevant overlays into sortvec. */
2908 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2911 Lisp_Object overlay
;
2913 overlay
= overlay_vec
[i
];
2914 if (OVERLAY_VALID (overlay
)
2915 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2916 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2918 /* If we're interested in a specific window, then ignore
2919 overlays that are limited to some other window. */
2924 window
= Foverlay_get (overlay
, Qwindow
);
2925 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2929 /* This overlay is good and counts: put it into sortvec. */
2930 sortvec
[j
].overlay
= overlay
;
2931 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2932 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2933 tem
= Foverlay_get (overlay
, Qpriority
);
2935 sortvec
[j
].priority
= XINT (tem
);
2937 sortvec
[j
].priority
= 0;
2943 /* Sort the overlays into the proper order: increasing priority. */
2946 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2948 for (i
= 0; i
< noverlays
; i
++)
2949 overlay_vec
[i
] = sortvec
[i
].overlay
;
2955 Lisp_Object string
, string2
;
2962 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2963 int size
; /* Allocated length of that array. */
2964 int used
; /* How much of the array is currently in use. */
2965 int bytes
; /* Total length of the strings in buf. */
2968 /* Buffers for storing information about the overlays touching a given
2969 position. These could be automatic variables in overlay_strings, but
2970 it's more efficient to hold onto the memory instead of repeatedly
2971 allocating and freeing it. */
2972 static struct sortstrlist overlay_heads
, overlay_tails
;
2973 static unsigned char *overlay_str_buf
;
2975 /* Allocated length of overlay_str_buf. */
2976 static int overlay_str_len
;
2978 /* A comparison function suitable for passing to qsort. */
2980 cmp_for_strings (as1
, as2
)
2983 struct sortstr
*s1
= (struct sortstr
*)as1
;
2984 struct sortstr
*s2
= (struct sortstr
*)as2
;
2985 if (s1
->size
!= s2
->size
)
2986 return s2
->size
- s1
->size
;
2987 if (s1
->priority
!= s2
->priority
)
2988 return s1
->priority
- s2
->priority
;
2993 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2994 struct sortstrlist
*ssl
;
2995 Lisp_Object str
, str2
, pri
;
3000 if (ssl
->used
== ssl
->size
)
3006 ssl
->buf
= ((struct sortstr
*)
3007 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
3009 ssl
->buf
[ssl
->used
].string
= str
;
3010 ssl
->buf
[ssl
->used
].string2
= str2
;
3011 ssl
->buf
[ssl
->used
].size
= size
;
3012 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
3015 if (NILP (current_buffer
->enable_multibyte_characters
))
3016 nbytes
= SCHARS (str
);
3017 else if (! STRING_MULTIBYTE (str
))
3018 nbytes
= count_size_as_multibyte (SDATA (str
),
3021 nbytes
= SBYTES (str
);
3023 ssl
->bytes
+= nbytes
;
3027 if (NILP (current_buffer
->enable_multibyte_characters
))
3028 nbytes
= SCHARS (str2
);
3029 else if (! STRING_MULTIBYTE (str2
))
3030 nbytes
= count_size_as_multibyte (SDATA (str2
),
3033 nbytes
= SBYTES (str2
);
3035 ssl
->bytes
+= nbytes
;
3039 /* Return the concatenation of the strings associated with overlays that
3040 begin or end at POS, ignoring overlays that are specific to a window
3041 other than W. The strings are concatenated in the appropriate order:
3042 shorter overlays nest inside longer ones, and higher priority inside
3043 lower. Normally all of the after-strings come first, but zero-sized
3044 overlays have their after-strings ride along with the before-strings
3045 because it would look strange to print them inside-out.
3047 Returns the string length, and stores the contents indirectly through
3048 PSTR, if that variable is non-null. The string may be overwritten by
3049 subsequent calls. */
3052 overlay_strings (pos
, w
, pstr
)
3055 unsigned char **pstr
;
3057 Lisp_Object overlay
, window
, str
;
3058 struct Lisp_Overlay
*ov
;
3059 int startpos
, endpos
;
3060 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
3062 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3063 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3064 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3066 XSETMISC (overlay
, ov
);
3067 eassert (OVERLAYP (overlay
));
3069 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3070 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3073 if (endpos
!= pos
&& startpos
!= pos
)
3075 window
= Foverlay_get (overlay
, Qwindow
);
3076 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3079 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3080 record_overlay_string (&overlay_heads
, str
,
3082 ? Foverlay_get (overlay
, Qafter_string
)
3084 Foverlay_get (overlay
, Qpriority
),
3086 else if (endpos
== pos
3087 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3088 record_overlay_string (&overlay_tails
, str
, Qnil
,
3089 Foverlay_get (overlay
, Qpriority
),
3092 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3094 XSETMISC (overlay
, ov
);
3095 eassert (OVERLAYP (overlay
));
3097 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3098 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3101 if (endpos
!= pos
&& startpos
!= pos
)
3103 window
= Foverlay_get (overlay
, Qwindow
);
3104 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3107 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3108 record_overlay_string (&overlay_heads
, str
,
3110 ? Foverlay_get (overlay
, Qafter_string
)
3112 Foverlay_get (overlay
, Qpriority
),
3114 else if (endpos
== pos
3115 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3116 record_overlay_string (&overlay_tails
, str
, Qnil
,
3117 Foverlay_get (overlay
, Qpriority
),
3120 if (overlay_tails
.used
> 1)
3121 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3123 if (overlay_heads
.used
> 1)
3124 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3126 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3131 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3133 if (total
> overlay_str_len
)
3135 overlay_str_len
= total
;
3136 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3139 p
= overlay_str_buf
;
3140 for (i
= overlay_tails
.used
; --i
>= 0;)
3143 tem
= overlay_tails
.buf
[i
].string
;
3144 nbytes
= copy_text (SDATA (tem
), p
,
3146 STRING_MULTIBYTE (tem
), multibyte
);
3149 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3152 tem
= overlay_heads
.buf
[i
].string
;
3153 nbytes
= copy_text (SDATA (tem
), p
,
3155 STRING_MULTIBYTE (tem
), multibyte
);
3157 tem
= overlay_heads
.buf
[i
].string2
;
3160 nbytes
= copy_text (SDATA (tem
), p
,
3162 STRING_MULTIBYTE (tem
), multibyte
);
3166 if (p
!= overlay_str_buf
+ total
)
3169 *pstr
= overlay_str_buf
;
3175 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3178 recenter_overlay_lists (buf
, pos
)
3182 Lisp_Object overlay
, beg
, end
;
3183 struct Lisp_Overlay
*prev
, *tail
, *next
;
3185 /* See if anything in overlays_before should move to overlays_after. */
3187 /* We don't strictly need prev in this loop; it should always be nil.
3188 But we use it for symmetry and in case that should cease to be true
3189 with some future change. */
3191 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3194 XSETMISC (overlay
, tail
);
3196 /* If the overlay is not valid, get rid of it. */
3197 if (!OVERLAY_VALID (overlay
))
3202 /* Splice the cons cell TAIL out of overlays_before. */
3206 buf
->overlays_before
= next
;
3212 beg
= OVERLAY_START (overlay
);
3213 end
= OVERLAY_END (overlay
);
3215 if (OVERLAY_POSITION (end
) > pos
)
3217 /* OVERLAY needs to be moved. */
3218 int where
= OVERLAY_POSITION (beg
);
3219 struct Lisp_Overlay
*other
, *other_prev
;
3221 /* Splice the cons cell TAIL out of overlays_before. */
3225 buf
->overlays_before
= next
;
3227 /* Search thru overlays_after for where to put it. */
3229 for (other
= buf
->overlays_after
; other
;
3230 other_prev
= other
, other
= other
->next
)
3232 Lisp_Object otherbeg
, otheroverlay
;
3234 XSETMISC (otheroverlay
, other
);
3235 eassert (OVERLAY_VALID (otheroverlay
));
3237 otherbeg
= OVERLAY_START (otheroverlay
);
3238 if (OVERLAY_POSITION (otherbeg
) >= where
)
3242 /* Add TAIL to overlays_after before OTHER. */
3245 other_prev
->next
= tail
;
3247 buf
->overlays_after
= tail
;
3251 /* We've reached the things that should stay in overlays_before.
3252 All the rest of overlays_before must end even earlier,
3257 /* See if anything in overlays_after should be in overlays_before. */
3259 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3262 XSETMISC (overlay
, tail
);
3264 /* If the overlay is not valid, get rid of it. */
3265 if (!OVERLAY_VALID (overlay
))
3270 /* Splice the cons cell TAIL out of overlays_after. */
3274 buf
->overlays_after
= next
;
3280 beg
= OVERLAY_START (overlay
);
3281 end
= OVERLAY_END (overlay
);
3283 /* Stop looking, when we know that nothing further
3284 can possibly end before POS. */
3285 if (OVERLAY_POSITION (beg
) > pos
)
3288 if (OVERLAY_POSITION (end
) <= pos
)
3290 /* OVERLAY needs to be moved. */
3291 int where
= OVERLAY_POSITION (end
);
3292 struct Lisp_Overlay
*other
, *other_prev
;
3294 /* Splice the cons cell TAIL out of overlays_after. */
3298 buf
->overlays_after
= next
;
3300 /* Search thru overlays_before for where to put it. */
3302 for (other
= buf
->overlays_before
; other
;
3303 other_prev
= other
, other
= other
->next
)
3305 Lisp_Object otherend
, otheroverlay
;
3307 XSETMISC (otheroverlay
, other
);
3308 eassert (OVERLAY_VALID (otheroverlay
));
3310 otherend
= OVERLAY_END (otheroverlay
);
3311 if (OVERLAY_POSITION (otherend
) <= where
)
3315 /* Add TAIL to overlays_before before OTHER. */
3318 other_prev
->next
= tail
;
3320 buf
->overlays_before
= tail
;
3325 buf
->overlay_center
= pos
;
3329 adjust_overlays_for_insert (pos
, length
)
3333 /* After an insertion, the lists are still sorted properly,
3334 but we may need to update the value of the overlay center. */
3335 if (current_buffer
->overlay_center
>= pos
)
3336 current_buffer
->overlay_center
+= length
;
3340 adjust_overlays_for_delete (pos
, length
)
3344 if (current_buffer
->overlay_center
< pos
)
3345 /* The deletion was to our right. No change needed; the before- and
3346 after-lists are still consistent. */
3348 else if (current_buffer
->overlay_center
> pos
+ length
)
3349 /* The deletion was to our left. We need to adjust the center value
3350 to account for the change in position, but the lists are consistent
3351 given the new value. */
3352 current_buffer
->overlay_center
-= length
;
3354 /* We're right in the middle. There might be things on the after-list
3355 that now belong on the before-list. Recentering will move them,
3356 and also update the center point. */
3357 recenter_overlay_lists (current_buffer
, pos
);
3360 /* Fix up overlays that were garbled as a result of permuting markers
3361 in the range START through END. Any overlay with at least one
3362 endpoint in this range will need to be unlinked from the overlay
3363 list and reinserted in its proper place.
3364 Such an overlay might even have negative size at this point.
3365 If so, we'll make the overlay empty. */
3367 fix_start_end_in_overlays (start
, end
)
3368 register int start
, end
;
3370 Lisp_Object overlay
;
3371 struct Lisp_Overlay
*before_list
, *after_list
;
3372 /* These are either nil, indicating that before_list or after_list
3373 should be assigned, or the cons cell the cdr of which should be
3375 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3376 /* 'Parent', likewise, indicates a cons cell or
3377 current_buffer->overlays_before or overlays_after, depending
3378 which loop we're in. */
3379 struct Lisp_Overlay
*tail
, *parent
;
3380 int startpos
, endpos
;
3382 /* This algorithm shifts links around instead of consing and GCing.
3383 The loop invariant is that before_list (resp. after_list) is a
3384 well-formed list except that its last element, the CDR of beforep
3385 (resp. afterp) if beforep (afterp) isn't nil or before_list
3386 (after_list) if it is, is still uninitialized. So it's not a bug
3387 that before_list isn't initialized, although it may look
3389 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3391 XSETMISC (overlay
, tail
);
3393 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3394 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3396 /* If the overlay is backwards, make it empty. */
3397 if (endpos
< startpos
)
3400 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3408 || (startpos
>= start
&& startpos
< end
))
3410 /* Add it to the end of the wrong list. Later on,
3411 recenter_overlay_lists will move it to the right place. */
3412 if (endpos
< current_buffer
->overlay_center
)
3417 afterp
->next
= tail
;
3425 beforep
->next
= tail
;
3429 current_buffer
->overlays_before
= tail
->next
;
3431 parent
->next
= tail
->next
;
3435 parent
= tail
, tail
= parent
->next
;
3437 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3439 XSETMISC (overlay
, tail
);
3441 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3442 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3444 /* If the overlay is backwards, make it empty. */
3445 if (endpos
< startpos
)
3448 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3452 if (startpos
>= end
)
3455 if (startpos
>= start
3456 || (endpos
>= start
&& endpos
< end
))
3458 if (endpos
< current_buffer
->overlay_center
)
3463 afterp
->next
= tail
;
3471 beforep
->next
= tail
;
3475 current_buffer
->overlays_after
= tail
->next
;
3477 parent
->next
= tail
->next
;
3481 parent
= tail
, tail
= parent
->next
;
3484 /* Splice the constructed (wrong) lists into the buffer's lists,
3485 and let the recenter function make it sane again. */
3488 beforep
->next
= current_buffer
->overlays_before
;
3489 current_buffer
->overlays_before
= before_list
;
3491 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3495 afterp
->next
= current_buffer
->overlays_after
;
3496 current_buffer
->overlays_after
= after_list
;
3498 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3501 /* We have two types of overlay: the one whose ending marker is
3502 after-insertion-marker (this is the usual case) and the one whose
3503 ending marker is before-insertion-marker. When `overlays_before'
3504 contains overlays of the latter type and the former type in this
3505 order and both overlays end at inserting position, inserting a text
3506 increases only the ending marker of the latter type, which results
3507 in incorrect ordering of `overlays_before'.
3509 This function fixes ordering of overlays in the slot
3510 `overlays_before' of the buffer *BP. Before the insertion, `point'
3511 was at PREV, and now is at POS. */
3514 fix_overlays_before (bp
, prev
, pos
)
3516 EMACS_INT prev
, pos
;
3518 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3519 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3523 /* After the insertion, the several overlays may be in incorrect
3524 order. The possibility is that, in the list `overlays_before',
3525 an overlay which ends at POS appears after an overlay which ends
3526 at PREV. Since POS is greater than PREV, we must fix the
3527 ordering of these overlays, by moving overlays ends at POS before
3528 the overlays ends at PREV. */
3530 /* At first, find a place where disordered overlays should be linked
3531 in. It is where an overlay which end before POS exists. (i.e. an
3532 overlay whose ending marker is after-insertion-marker if disorder
3535 && (XSETMISC (tem
, tail
),
3536 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3542 /* If we don't find such an overlay,
3543 or the found one ends before PREV,
3544 or the found one is the last one in the list,
3545 we don't have to fix anything. */
3546 if (!tail
|| end
< prev
|| !tail
->next
)
3549 right_pair
= parent
;
3553 /* Now, end position of overlays in the list TAIL should be before
3554 or equal to PREV. In the loop, an overlay which ends at POS is
3555 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3556 we found an overlay which ends before PREV, the remaining
3557 overlays are in correct order. */
3560 XSETMISC (tem
, tail
);
3561 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3564 { /* This overlay is disordered. */
3565 struct Lisp_Overlay
*found
= tail
;
3567 /* Unlink the found overlay. */
3569 parent
->next
= tail
;
3570 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3571 and link it into the right place. */
3574 found
->next
= bp
->overlays_before
;
3575 bp
->overlays_before
= found
;
3579 found
->next
= right_pair
->next
;
3580 right_pair
->next
= found
;
3583 else if (end
== prev
)
3588 else /* No more disordered overlay. */
3593 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3594 doc
: /* Return t if OBJECT is an overlay. */)
3598 return (OVERLAYP (object
) ? Qt
: Qnil
);
3601 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3602 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3603 If omitted, BUFFER defaults to the current buffer.
3604 BEG and END may be integers or markers.
3605 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3606 for the front of the overlay advance when text is inserted there
3607 \(which means the text *is not* included in the overlay).
3608 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3609 for the rear of the overlay advance when text is inserted there
3610 \(which means the text *is* included in the overlay). */)
3611 (beg
, end
, buffer
, front_advance
, rear_advance
)
3612 Lisp_Object beg
, end
, buffer
;
3613 Lisp_Object front_advance
, rear_advance
;
3615 Lisp_Object overlay
;
3619 XSETBUFFER (buffer
, current_buffer
);
3621 CHECK_BUFFER (buffer
);
3623 && ! EQ (Fmarker_buffer (beg
), buffer
))
3624 error ("Marker points into wrong buffer");
3626 && ! EQ (Fmarker_buffer (end
), buffer
))
3627 error ("Marker points into wrong buffer");
3629 CHECK_NUMBER_COERCE_MARKER (beg
);
3630 CHECK_NUMBER_COERCE_MARKER (end
);
3632 if (XINT (beg
) > XINT (end
))
3635 temp
= beg
; beg
= end
; end
= temp
;
3638 b
= XBUFFER (buffer
);
3640 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3641 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3643 if (!NILP (front_advance
))
3644 XMARKER (beg
)->insertion_type
= 1;
3645 if (!NILP (rear_advance
))
3646 XMARKER (end
)->insertion_type
= 1;
3648 overlay
= allocate_misc ();
3649 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3650 XOVERLAY (overlay
)->start
= beg
;
3651 XOVERLAY (overlay
)->end
= end
;
3652 XOVERLAY (overlay
)->plist
= Qnil
;
3653 XOVERLAY (overlay
)->next
= NULL
;
3655 /* Put the new overlay on the wrong list. */
3656 end
= OVERLAY_END (overlay
);
3657 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3659 if (b
->overlays_after
)
3660 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3661 b
->overlays_after
= XOVERLAY (overlay
);
3665 if (b
->overlays_before
)
3666 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3667 b
->overlays_before
= XOVERLAY (overlay
);
3670 /* This puts it in the right list, and in the right order. */
3671 recenter_overlay_lists (b
, b
->overlay_center
);
3673 /* We don't need to redisplay the region covered by the overlay, because
3674 the overlay has no properties at the moment. */
3679 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3682 modify_overlay (buf
, start
, end
)
3684 EMACS_INT start
, end
;
3693 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3695 /* If this is a buffer not in the selected window,
3696 we must do other windows. */
3697 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3698 windows_or_buffers_changed
= 1;
3699 /* If multiple windows show this buffer, we must do other windows. */
3700 else if (buffer_shared
> 1)
3701 windows_or_buffers_changed
= 1;
3702 /* If we modify an overlay at the end of the buffer, we cannot
3703 be sure that window end is still valid. */
3704 else if (end
>= ZV
&& start
<= ZV
)
3705 windows_or_buffers_changed
= 1;
3707 ++BUF_OVERLAY_MODIFF (buf
);
3711 Lisp_Object
Fdelete_overlay ();
3713 static struct Lisp_Overlay
*
3714 unchain_overlay (list
, overlay
)
3715 struct Lisp_Overlay
*list
, *overlay
;
3717 struct Lisp_Overlay
*tmp
, *prev
;
3718 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3722 prev
->next
= tmp
->next
;
3725 overlay
->next
= NULL
;
3731 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3732 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3733 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3734 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3736 (overlay
, beg
, end
, buffer
)
3737 Lisp_Object overlay
, beg
, end
, buffer
;
3739 struct buffer
*b
, *ob
;
3740 Lisp_Object obuffer
;
3741 int count
= SPECPDL_INDEX ();
3743 CHECK_OVERLAY (overlay
);
3745 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3747 XSETBUFFER (buffer
, current_buffer
);
3748 CHECK_BUFFER (buffer
);
3751 && ! EQ (Fmarker_buffer (beg
), buffer
))
3752 error ("Marker points into wrong buffer");
3754 && ! EQ (Fmarker_buffer (end
), buffer
))
3755 error ("Marker points into wrong buffer");
3757 CHECK_NUMBER_COERCE_MARKER (beg
);
3758 CHECK_NUMBER_COERCE_MARKER (end
);
3760 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3761 return Fdelete_overlay (overlay
);
3763 if (XINT (beg
) > XINT (end
))
3766 temp
= beg
; beg
= end
; end
= temp
;
3769 specbind (Qinhibit_quit
, Qt
);
3771 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3772 b
= XBUFFER (buffer
);
3773 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3775 /* If the overlay has changed buffers, do a thorough redisplay. */
3776 if (!EQ (buffer
, obuffer
))
3778 /* Redisplay where the overlay was. */
3779 if (!NILP (obuffer
))
3784 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3785 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3787 modify_overlay (ob
, o_beg
, o_end
);
3790 /* Redisplay where the overlay is going to be. */
3791 modify_overlay (b
, XINT (beg
), XINT (end
));
3794 /* Redisplay the area the overlay has just left, or just enclosed. */
3798 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3799 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3801 if (o_beg
== XINT (beg
))
3802 modify_overlay (b
, o_end
, XINT (end
));
3803 else if (o_end
== XINT (end
))
3804 modify_overlay (b
, o_beg
, XINT (beg
));
3807 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3808 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3809 modify_overlay (b
, o_beg
, o_end
);
3813 if (!NILP (obuffer
))
3816 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3818 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3819 eassert (XOVERLAY (overlay
)->next
== NULL
);
3822 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3823 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3825 /* Put the overlay on the wrong list. */
3826 end
= OVERLAY_END (overlay
);
3827 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3829 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3830 b
->overlays_after
= XOVERLAY (overlay
);
3834 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3835 b
->overlays_before
= XOVERLAY (overlay
);
3838 /* This puts it in the right list, and in the right order. */
3839 recenter_overlay_lists (b
, b
->overlay_center
);
3841 return unbind_to (count
, overlay
);
3844 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3845 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3847 Lisp_Object overlay
;
3851 int count
= SPECPDL_INDEX ();
3853 CHECK_OVERLAY (overlay
);
3855 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3859 b
= XBUFFER (buffer
);
3860 specbind (Qinhibit_quit
, Qt
);
3862 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3863 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3864 eassert (XOVERLAY (overlay
)->next
== NULL
);
3866 marker_position (OVERLAY_START (overlay
)),
3867 marker_position (OVERLAY_END (overlay
)));
3868 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3869 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3871 /* When deleting an overlay with before or after strings, turn off
3872 display optimizations for the affected buffer, on the basis that
3873 these strings may contain newlines. This is easier to do than to
3874 check for that situation during redisplay. */
3875 if (!windows_or_buffers_changed
3876 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3877 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3878 b
->prevent_redisplay_optimizations_p
= 1;
3880 return unbind_to (count
, Qnil
);
3883 /* Overlay dissection functions. */
3885 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3886 doc
: /* Return the position at which OVERLAY starts. */)
3888 Lisp_Object overlay
;
3890 CHECK_OVERLAY (overlay
);
3892 return (Fmarker_position (OVERLAY_START (overlay
)));
3895 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3896 doc
: /* Return the position at which OVERLAY ends. */)
3898 Lisp_Object overlay
;
3900 CHECK_OVERLAY (overlay
);
3902 return (Fmarker_position (OVERLAY_END (overlay
)));
3905 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3906 doc
: /* Return the buffer OVERLAY belongs to.
3907 Return nil if OVERLAY has been deleted. */)
3909 Lisp_Object overlay
;
3911 CHECK_OVERLAY (overlay
);
3913 return Fmarker_buffer (OVERLAY_START (overlay
));
3916 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3917 doc
: /* Return a list of the properties on OVERLAY.
3918 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3921 Lisp_Object overlay
;
3923 CHECK_OVERLAY (overlay
);
3925 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3929 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3930 doc
: /* Return a list of the overlays that contain position POS. */)
3935 Lisp_Object
*overlay_vec
;
3939 CHECK_NUMBER_COERCE_MARKER (pos
);
3942 /* We can't use alloca here because overlays_at can call xrealloc. */
3943 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3945 /* Put all the overlays we want in a vector in overlay_vec.
3946 Store the length in len. */
3947 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3948 (int *) 0, (int *) 0, 0);
3950 /* Make a list of them all. */
3951 result
= Flist (noverlays
, overlay_vec
);
3953 xfree (overlay_vec
);
3957 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3958 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3959 Overlap means that at least one character is contained within the overlay
3960 and also contained within the specified region.
3961 Empty overlays are included in the result if they are located at BEG
3962 or between BEG and END. */)
3964 Lisp_Object beg
, end
;
3967 Lisp_Object
*overlay_vec
;
3971 CHECK_NUMBER_COERCE_MARKER (beg
);
3972 CHECK_NUMBER_COERCE_MARKER (end
);
3975 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3977 /* Put all the overlays we want in a vector in overlay_vec.
3978 Store the length in len. */
3979 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3980 (int *) 0, (int *) 0);
3982 /* Make a list of them all. */
3983 result
= Flist (noverlays
, overlay_vec
);
3985 xfree (overlay_vec
);
3989 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3991 doc
: /* Return the next position after POS where an overlay starts or ends.
3992 If there are no overlay boundaries from POS to (point-max),
3993 the value is (point-max). */)
3999 Lisp_Object
*overlay_vec
;
4003 CHECK_NUMBER_COERCE_MARKER (pos
);
4006 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4008 /* Put all the overlays we want in a vector in overlay_vec.
4009 Store the length in len.
4010 endpos gets the position where the next overlay starts. */
4011 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4012 &endpos
, (int *) 0, 1);
4014 /* If any of these overlays ends before endpos,
4015 use its ending point instead. */
4016 for (i
= 0; i
< noverlays
; i
++)
4021 oend
= OVERLAY_END (overlay_vec
[i
]);
4022 oendpos
= OVERLAY_POSITION (oend
);
4023 if (oendpos
< endpos
)
4027 xfree (overlay_vec
);
4028 return make_number (endpos
);
4031 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
4032 Sprevious_overlay_change
, 1, 1, 0,
4033 doc
: /* Return the previous position before POS where an overlay starts or ends.
4034 If there are no overlay boundaries from (point-min) to POS,
4035 the value is (point-min). */)
4041 Lisp_Object
*overlay_vec
;
4044 CHECK_NUMBER_COERCE_MARKER (pos
);
4046 /* At beginning of buffer, we know the answer;
4047 avoid bug subtracting 1 below. */
4048 if (XINT (pos
) == BEGV
)
4052 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4054 /* Put all the overlays we want in a vector in overlay_vec.
4055 Store the length in len.
4056 prevpos gets the position of the previous change. */
4057 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4058 (int *) 0, &prevpos
, 1);
4060 xfree (overlay_vec
);
4061 return make_number (prevpos
);
4064 /* These functions are for debugging overlays. */
4066 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4067 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4068 The car has all the overlays before the overlay center;
4069 the cdr has all the overlays after the overlay center.
4070 Recentering overlays moves overlays between these lists.
4071 The lists you get are copies, so that changing them has no effect.
4072 However, the overlays you get are the real objects that the buffer uses. */)
4075 struct Lisp_Overlay
*ol
;
4076 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4077 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4080 before
= Fcons (tmp
, before
);
4082 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4085 after
= Fcons (tmp
, after
);
4087 return Fcons (Fnreverse (before
), Fnreverse (after
));
4090 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4091 doc
: /* Recenter the overlays of the current buffer around position POS.
4092 That makes overlay lookup faster for positions near POS (but perhaps slower
4093 for positions far away from POS). */)
4097 CHECK_NUMBER_COERCE_MARKER (pos
);
4099 recenter_overlay_lists (current_buffer
, XINT (pos
));
4103 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4104 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4106 Lisp_Object overlay
, prop
;
4108 CHECK_OVERLAY (overlay
);
4109 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4112 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4113 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4114 (overlay
, prop
, value
)
4115 Lisp_Object overlay
, prop
, value
;
4117 Lisp_Object tail
, buffer
;
4120 CHECK_OVERLAY (overlay
);
4122 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4124 for (tail
= XOVERLAY (overlay
)->plist
;
4125 CONSP (tail
) && CONSP (XCDR (tail
));
4126 tail
= XCDR (XCDR (tail
)))
4127 if (EQ (XCAR (tail
), prop
))
4129 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4130 XSETCAR (XCDR (tail
), value
);
4133 /* It wasn't in the list, so add it to the front. */
4134 changed
= !NILP (value
);
4135 XOVERLAY (overlay
)->plist
4136 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4138 if (! NILP (buffer
))
4141 modify_overlay (XBUFFER (buffer
),
4142 marker_position (OVERLAY_START (overlay
)),
4143 marker_position (OVERLAY_END (overlay
)));
4144 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4145 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4146 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4147 Fdelete_overlay (overlay
);
4153 /* Subroutine of report_overlay_modification. */
4155 /* Lisp vector holding overlay hook functions to call.
4156 Vector elements come in pairs.
4157 Each even-index element is a list of hook functions.
4158 The following odd-index element is the overlay they came from.
4160 Before the buffer change, we fill in this vector
4161 as we call overlay hook functions.
4162 After the buffer change, we get the functions to call from this vector.
4163 This way we always call the same functions before and after the change. */
4164 static Lisp_Object last_overlay_modification_hooks
;
4166 /* Number of elements actually used in last_overlay_modification_hooks. */
4167 static int last_overlay_modification_hooks_used
;
4169 /* Add one functionlist/overlay pair
4170 to the end of last_overlay_modification_hooks. */
4173 add_overlay_mod_hooklist (functionlist
, overlay
)
4174 Lisp_Object functionlist
, overlay
;
4176 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4178 if (last_overlay_modification_hooks_used
== oldsize
)
4181 old
= last_overlay_modification_hooks
;
4182 last_overlay_modification_hooks
4183 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
4184 bcopy (XVECTOR (old
)->contents
,
4185 XVECTOR (last_overlay_modification_hooks
)->contents
,
4186 sizeof (Lisp_Object
) * oldsize
);
4188 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = functionlist
;
4189 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = overlay
;
4192 /* Run the modification-hooks of overlays that include
4193 any part of the text in START to END.
4194 If this change is an insertion, also
4195 run the insert-before-hooks of overlay starting at END,
4196 and the insert-after-hooks of overlay ending at START.
4198 This is called both before and after the modification.
4199 AFTER is nonzero when we call after the modification.
4201 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4202 When AFTER is nonzero, they are the start position,
4203 the position after the inserted new text,
4204 and the length of deleted or replaced old text. */
4207 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4208 Lisp_Object start
, end
;
4210 Lisp_Object arg1
, arg2
, arg3
;
4212 Lisp_Object prop
, overlay
;
4213 struct Lisp_Overlay
*tail
;
4214 /* 1 if this change is an insertion. */
4215 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4216 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4221 /* We used to run the functions as soon as we found them and only register
4222 them in last_overlay_modification_hooks for the purpose of the `after'
4223 case. But running elisp code as we traverse the list of overlays is
4224 painful because the list can be modified by the elisp code so we had to
4225 copy at several places. We now simply do a read-only traversal that
4226 only collects the functions to run and we run them afterwards. It's
4227 simpler, especially since all the code was already there. -stef */
4231 /* We are being called before a change.
4232 Scan the overlays to find the functions to call. */
4233 last_overlay_modification_hooks_used
= 0;
4234 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4236 int startpos
, endpos
;
4237 Lisp_Object ostart
, oend
;
4239 XSETMISC (overlay
, tail
);
4241 ostart
= OVERLAY_START (overlay
);
4242 oend
= OVERLAY_END (overlay
);
4243 endpos
= OVERLAY_POSITION (oend
);
4244 if (XFASTINT (start
) > endpos
)
4246 startpos
= OVERLAY_POSITION (ostart
);
4247 if (insertion
&& (XFASTINT (start
) == startpos
4248 || XFASTINT (end
) == startpos
))
4250 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4252 add_overlay_mod_hooklist (prop
, overlay
);
4254 if (insertion
&& (XFASTINT (start
) == endpos
4255 || XFASTINT (end
) == endpos
))
4257 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4259 add_overlay_mod_hooklist (prop
, overlay
);
4261 /* Test for intersecting intervals. This does the right thing
4262 for both insertion and deletion. */
4263 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4265 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4267 add_overlay_mod_hooklist (prop
, overlay
);
4271 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4273 int startpos
, endpos
;
4274 Lisp_Object ostart
, oend
;
4276 XSETMISC (overlay
, tail
);
4278 ostart
= OVERLAY_START (overlay
);
4279 oend
= OVERLAY_END (overlay
);
4280 startpos
= OVERLAY_POSITION (ostart
);
4281 endpos
= OVERLAY_POSITION (oend
);
4282 if (XFASTINT (end
) < startpos
)
4284 if (insertion
&& (XFASTINT (start
) == startpos
4285 || XFASTINT (end
) == startpos
))
4287 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4289 add_overlay_mod_hooklist (prop
, overlay
);
4291 if (insertion
&& (XFASTINT (start
) == endpos
4292 || XFASTINT (end
) == endpos
))
4294 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4296 add_overlay_mod_hooklist (prop
, overlay
);
4298 /* Test for intersecting intervals. This does the right thing
4299 for both insertion and deletion. */
4300 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4302 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4304 add_overlay_mod_hooklist (prop
, overlay
);
4309 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4311 /* Call the functions recorded in last_overlay_modification_hooks.
4312 First copy the vector contents, in case some of these hooks
4313 do subsequent modification of the buffer. */
4314 int size
= last_overlay_modification_hooks_used
;
4315 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4318 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4319 copy
, size
* sizeof (Lisp_Object
));
4321 gcpro1
.nvars
= size
;
4323 for (i
= 0; i
< size
;)
4325 Lisp_Object prop
, overlay
;
4327 overlay
= copy
[i
++];
4328 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4335 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4336 Lisp_Object list
, overlay
;
4338 Lisp_Object arg1
, arg2
, arg3
;
4340 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4342 GCPRO4 (list
, arg1
, arg2
, arg3
);
4344 while (CONSP (list
))
4347 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4349 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4355 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4358 evaporate_overlays (pos
)
4361 Lisp_Object overlay
, hit_list
;
4362 struct Lisp_Overlay
*tail
;
4365 if (pos
<= current_buffer
->overlay_center
)
4366 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4369 XSETMISC (overlay
, tail
);
4370 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4373 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4374 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4375 hit_list
= Fcons (overlay
, hit_list
);
4378 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4381 XSETMISC (overlay
, tail
);
4382 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4385 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4386 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4387 hit_list
= Fcons (overlay
, hit_list
);
4389 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4390 Fdelete_overlay (XCAR (hit_list
));
4393 /* Somebody has tried to store a value with an unacceptable type
4394 in the slot with offset OFFSET. */
4397 buffer_slot_type_mismatch (offset
)
4403 switch (XINT (PER_BUFFER_TYPE (offset
)))
4406 type_name
= "integers";
4410 type_name
= "strings";
4414 type_name
= "symbols";
4421 sym
= PER_BUFFER_SYMBOL (offset
);
4422 error ("Only %s should be stored in the buffer-local variable %s",
4423 type_name
, SDATA (SYMBOL_NAME (sym
)));
4427 /***********************************************************************
4428 Allocation with mmap
4429 ***********************************************************************/
4431 #ifdef USE_MMAP_FOR_BUFFERS
4433 #include <sys/types.h>
4434 #include <sys/mman.h>
4437 #ifdef MAP_ANONYMOUS
4438 #define MAP_ANON MAP_ANONYMOUS
4445 #define MAP_FAILED ((void *) -1)
4458 /* Memory is allocated in regions which are mapped using mmap(2).
4459 The current implementation lets the system select mapped
4460 addresses; we're not using MAP_FIXED in general, except when
4461 trying to enlarge regions.
4463 Each mapped region starts with a mmap_region structure, the user
4464 area starts after that structure, aligned to MEM_ALIGN.
4466 +-----------------------+
4467 | struct mmap_info + |
4469 +-----------------------+
4473 +-----------------------+ */
4477 /* User-specified size. */
4478 size_t nbytes_specified
;
4480 /* Number of bytes mapped */
4481 size_t nbytes_mapped
;
4483 /* Pointer to the location holding the address of the memory
4484 allocated with the mmap'd block. The variable actually points
4485 after this structure. */
4488 /* Next and previous in list of all mmap'd regions. */
4489 struct mmap_region
*next
, *prev
;
4492 /* Doubly-linked list of mmap'd regions. */
4494 static struct mmap_region
*mmap_regions
;
4496 /* File descriptor for mmap. If we don't have anonymous mapping,
4497 /dev/zero will be opened on it. */
4501 /* Temporary storage for mmap_set_vars, see there. */
4503 static struct mmap_region
*mmap_regions_1
;
4504 static int mmap_fd_1
;
4506 /* Page size on this system. */
4508 static int mmap_page_size
;
4510 /* 1 means mmap has been intialized. */
4512 static int mmap_initialized_p
;
4514 /* Value is X rounded up to the next multiple of N. */
4516 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4518 /* Size of mmap_region structure plus padding. */
4520 #define MMAP_REGION_STRUCT_SIZE \
4521 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4523 /* Given a pointer P to the start of the user-visible part of a mapped
4524 region, return a pointer to the start of the region. */
4526 #define MMAP_REGION(P) \
4527 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4529 /* Given a pointer P to the start of a mapped region, return a pointer
4530 to the start of the user-visible part of the region. */
4532 #define MMAP_USER_AREA(P) \
4533 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4535 #define MEM_ALIGN sizeof (double)
4537 /* Predicate returning true if part of the address range [START .. END]
4538 is currently mapped. Used to prevent overwriting an existing
4541 Default is to conservativly assume the address range is occupied by
4542 something else. This can be overridden by system configuration
4543 files if system-specific means to determine this exists. */
4545 #ifndef MMAP_ALLOCATED_P
4546 #define MMAP_ALLOCATED_P(start, end) 1
4549 /* Function prototypes. */
4551 static int mmap_free_1
P_ ((struct mmap_region
*));
4552 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4553 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4554 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4555 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4556 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4557 static void mmap_init
P_ ((void));
4560 /* Return a region overlapping address range START...END, or null if
4561 none. END is not including, i.e. the last byte in the range
4564 static struct mmap_region
*
4565 mmap_find (start
, end
)
4566 POINTER_TYPE
*start
, *end
;
4568 struct mmap_region
*r
;
4569 char *s
= (char *) start
, *e
= (char *) end
;
4571 for (r
= mmap_regions
; r
; r
= r
->next
)
4573 char *rstart
= (char *) r
;
4574 char *rend
= rstart
+ r
->nbytes_mapped
;
4576 if (/* First byte of range, i.e. START, in this region? */
4577 (s
>= rstart
&& s
< rend
)
4578 /* Last byte of range, i.e. END - 1, in this region? */
4579 || (e
> rstart
&& e
<= rend
)
4580 /* First byte of this region in the range? */
4581 || (rstart
>= s
&& rstart
< e
)
4582 /* Last byte of this region in the range? */
4583 || (rend
> s
&& rend
<= e
))
4591 /* Unmap a region. P is a pointer to the start of the user-araa of
4592 the region. Value is non-zero if successful. */
4596 struct mmap_region
*r
;
4599 r
->next
->prev
= r
->prev
;
4601 r
->prev
->next
= r
->next
;
4603 mmap_regions
= r
->next
;
4605 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4607 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4615 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4616 Value is non-zero if successful. */
4619 mmap_enlarge (r
, npages
)
4620 struct mmap_region
*r
;
4623 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4629 /* Unmap pages at the end of the region. */
4630 nbytes
= - npages
* mmap_page_size
;
4631 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4632 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4635 r
->nbytes_mapped
-= nbytes
;
4639 else if (npages
> 0)
4641 nbytes
= npages
* mmap_page_size
;
4643 /* Try to map additional pages at the end of the region. We
4644 cannot do this if the address range is already occupied by
4645 something else because mmap deletes any previous mapping.
4646 I'm not sure this is worth doing, let's see. */
4647 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4651 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4652 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4653 if (p
== MAP_FAILED
)
4654 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4655 else if (p
!= (POINTER_TYPE
*) region_end
)
4657 /* Kernels are free to choose a different address. In
4658 that case, unmap what we've mapped above; we have
4660 if (munmap (p
, nbytes
) == -1)
4661 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4665 r
->nbytes_mapped
+= nbytes
;
4675 /* Set or reset variables holding references to mapped regions. If
4676 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4677 non-zero, set all variables to the start of the user-areas
4680 This function is called from Fdump_emacs to ensure that the dumped
4681 Emacs doesn't contain references to memory that won't be mapped
4682 when Emacs starts. */
4685 mmap_set_vars (restore_p
)
4688 struct mmap_region
*r
;
4692 mmap_regions
= mmap_regions_1
;
4693 mmap_fd
= mmap_fd_1
;
4694 for (r
= mmap_regions
; r
; r
= r
->next
)
4695 *r
->var
= MMAP_USER_AREA (r
);
4699 for (r
= mmap_regions
; r
; r
= r
->next
)
4701 mmap_regions_1
= mmap_regions
;
4702 mmap_regions
= NULL
;
4703 mmap_fd_1
= mmap_fd
;
4709 /* Allocate a block of storage large enough to hold NBYTES bytes of
4710 data. A pointer to the data is returned in *VAR. VAR is thus the
4711 address of some variable which will use the data area.
4713 The allocation of 0 bytes is valid.
4715 If we can't allocate the necessary memory, set *VAR to null, and
4718 static POINTER_TYPE
*
4719 mmap_alloc (var
, nbytes
)
4728 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4729 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4732 if (p
== MAP_FAILED
)
4734 if (errno
!= ENOMEM
)
4735 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4740 struct mmap_region
*r
= (struct mmap_region
*) p
;
4742 r
->nbytes_specified
= nbytes
;
4743 r
->nbytes_mapped
= map
;
4746 r
->next
= mmap_regions
;
4751 p
= MMAP_USER_AREA (p
);
4758 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4759 resize it to size NBYTES. Change *VAR to reflect the new block,
4760 and return this value. If more memory cannot be allocated, then
4761 leave *VAR unchanged, and return null. */
4763 static POINTER_TYPE
*
4764 mmap_realloc (var
, nbytes
)
4768 POINTER_TYPE
*result
;
4773 result
= mmap_alloc (var
, nbytes
);
4774 else if (nbytes
== 0)
4777 result
= mmap_alloc (var
, nbytes
);
4781 struct mmap_region
*r
= MMAP_REGION (*var
);
4782 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4787 POINTER_TYPE
*old_ptr
= *var
;
4789 /* Try to map additional pages at the end of the region.
4790 If that fails, allocate a new region, copy data
4791 from the old region, then free it. */
4792 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4795 r
->nbytes_specified
= nbytes
;
4796 *var
= result
= old_ptr
;
4798 else if (mmap_alloc (var
, nbytes
))
4800 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4801 mmap_free_1 (MMAP_REGION (old_ptr
));
4803 r
= MMAP_REGION (result
);
4804 r
->nbytes_specified
= nbytes
;
4812 else if (room
- nbytes
>= mmap_page_size
)
4814 /* Shrinking by at least a page. Let's give some
4815 memory back to the system.
4817 The extra parens are to make the division happens first,
4818 on positive values, so we know it will round towards
4820 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4822 r
->nbytes_specified
= nbytes
;
4826 /* Leave it alone. */
4828 r
->nbytes_specified
= nbytes
;
4836 /* Free a block of relocatable storage whose data is pointed to by
4837 PTR. Store 0 in *PTR to show there's no block allocated. */
4847 mmap_free_1 (MMAP_REGION (*var
));
4853 /* Perform necessary intializations for the use of mmap. */
4859 /* The value of mmap_fd is initially 0 in temacs, and -1
4860 in a dumped Emacs. */
4863 /* No anonymous mmap -- we need the file descriptor. */
4864 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4866 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4868 #endif /* MAP_ANON == 0 */
4870 if (mmap_initialized_p
)
4872 mmap_initialized_p
= 1;
4878 mmap_page_size
= getpagesize ();
4881 #endif /* USE_MMAP_FOR_BUFFERS */
4885 /***********************************************************************
4886 Buffer-text Allocation
4887 ***********************************************************************/
4890 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4891 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4892 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4893 #endif /* REL_ALLOC */
4896 /* Allocate NBYTES bytes for buffer B's text buffer. */
4899 alloc_buffer_text (b
, nbytes
)
4906 #if defined USE_MMAP_FOR_BUFFERS
4907 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4908 #elif defined REL_ALLOC
4909 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4911 p
= xmalloc (nbytes
);
4920 b
->text
->beg
= (unsigned char *) p
;
4924 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4928 enlarge_buffer_text (b
, delta
)
4933 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4936 #if defined USE_MMAP_FOR_BUFFERS
4937 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4938 #elif defined REL_ALLOC
4939 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4941 p
= xrealloc (b
->text
->beg
, nbytes
);
4950 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4955 /* Free buffer B's text buffer. */
4958 free_buffer_text (b
)
4963 #if defined USE_MMAP_FOR_BUFFERS
4964 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4965 #elif defined REL_ALLOC
4966 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4968 xfree (b
->text
->beg
);
4971 BUF_BEG_ADDR (b
) = NULL
;
4977 /***********************************************************************
4979 ***********************************************************************/
4986 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4988 /* Make sure all markable slots in buffer_defaults
4989 are initialized reasonably, so mark_buffer won't choke. */
4990 reset_buffer (&buffer_defaults
);
4991 reset_buffer_local_variables (&buffer_defaults
, 1);
4992 reset_buffer (&buffer_local_symbols
);
4993 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4994 /* Prevent GC from getting confused. */
4995 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4996 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4997 BUF_INTERVALS (&buffer_defaults
) = 0;
4998 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4999 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
5000 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
5002 /* Set up the default values of various buffer slots. */
5003 /* Must do these before making the first buffer! */
5005 /* real setup is done in bindings.el */
5006 buffer_defaults
.mode_line_format
= build_string ("%-");
5007 buffer_defaults
.header_line_format
= Qnil
;
5008 buffer_defaults
.abbrev_mode
= Qnil
;
5009 buffer_defaults
.overwrite_mode
= Qnil
;
5010 buffer_defaults
.case_fold_search
= Qt
;
5011 buffer_defaults
.auto_fill_function
= Qnil
;
5012 buffer_defaults
.selective_display
= Qnil
;
5014 buffer_defaults
.selective_display_ellipses
= Qt
;
5016 buffer_defaults
.abbrev_table
= Qnil
;
5017 buffer_defaults
.display_table
= Qnil
;
5018 buffer_defaults
.undo_list
= Qnil
;
5019 buffer_defaults
.mark_active
= Qnil
;
5020 buffer_defaults
.file_format
= Qnil
;
5021 buffer_defaults
.auto_save_file_format
= Qt
;
5022 buffer_defaults
.overlays_before
= NULL
;
5023 buffer_defaults
.overlays_after
= NULL
;
5024 buffer_defaults
.overlay_center
= BEG
;
5026 XSETFASTINT (buffer_defaults
.tab_width
, 8);
5027 buffer_defaults
.truncate_lines
= Qnil
;
5028 buffer_defaults
.ctl_arrow
= Qt
;
5029 buffer_defaults
.direction_reversed
= Qnil
;
5030 buffer_defaults
.cursor_type
= Qt
;
5031 buffer_defaults
.extra_line_spacing
= Qnil
;
5032 buffer_defaults
.cursor_in_non_selected_windows
= Qt
;
5035 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
5037 buffer_defaults
.enable_multibyte_characters
= Qt
;
5038 buffer_defaults
.buffer_file_coding_system
= Qnil
;
5039 XSETFASTINT (buffer_defaults
.fill_column
, 70);
5040 XSETFASTINT (buffer_defaults
.left_margin
, 0);
5041 buffer_defaults
.cache_long_line_scans
= Qnil
;
5042 buffer_defaults
.file_truename
= Qnil
;
5043 XSETFASTINT (buffer_defaults
.display_count
, 0);
5044 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
5045 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
5046 buffer_defaults
.left_fringe_width
= Qnil
;
5047 buffer_defaults
.right_fringe_width
= Qnil
;
5048 buffer_defaults
.fringes_outside_margins
= Qnil
;
5049 buffer_defaults
.scroll_bar_width
= Qnil
;
5050 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
5051 buffer_defaults
.indicate_empty_lines
= Qnil
;
5052 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
5053 buffer_defaults
.fringe_indicator_alist
= Qnil
;
5054 buffer_defaults
.fringe_cursor_alist
= Qnil
;
5055 buffer_defaults
.scroll_up_aggressively
= Qnil
;
5056 buffer_defaults
.scroll_down_aggressively
= Qnil
;
5057 buffer_defaults
.display_time
= Qnil
;
5059 /* Assign the local-flags to the slots that have default values.
5060 The local flag is a bit that is used in the buffer
5061 to say that it has its own local value for the slot.
5062 The local flag bits are in the local_var_flags slot of the buffer. */
5064 /* Nothing can work if this isn't true */
5065 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
5067 /* 0 means not a lisp var, -1 means always local, else mask */
5068 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
5069 XSETINT (buffer_local_flags
.filename
, -1);
5070 XSETINT (buffer_local_flags
.directory
, -1);
5071 XSETINT (buffer_local_flags
.backed_up
, -1);
5072 XSETINT (buffer_local_flags
.save_length
, -1);
5073 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
5074 XSETINT (buffer_local_flags
.read_only
, -1);
5075 XSETINT (buffer_local_flags
.major_mode
, -1);
5076 XSETINT (buffer_local_flags
.mode_name
, -1);
5077 XSETINT (buffer_local_flags
.undo_list
, -1);
5078 XSETINT (buffer_local_flags
.mark_active
, -1);
5079 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
5080 XSETINT (buffer_local_flags
.file_truename
, -1);
5081 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
5082 XSETINT (buffer_local_flags
.file_format
, -1);
5083 XSETINT (buffer_local_flags
.auto_save_file_format
, -1);
5084 XSETINT (buffer_local_flags
.display_count
, -1);
5085 XSETINT (buffer_local_flags
.display_time
, -1);
5086 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
5089 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
5090 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
5091 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5092 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5093 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5094 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5096 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5098 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5099 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5100 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5101 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5102 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5103 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5104 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5106 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5107 /* Make this one a permanent local. */
5108 buffer_permanent_local_flags
[idx
++] = 1;
5110 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5111 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5112 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5113 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
5114 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5115 /* Make this one a permanent local. */
5116 buffer_permanent_local_flags
[idx
++] = 1;
5117 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5118 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5119 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5120 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5121 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5122 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5123 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5124 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5125 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5126 XSETFASTINT (buffer_local_flags
.fringe_indicator_alist
, idx
); ++idx
;
5127 XSETFASTINT (buffer_local_flags
.fringe_cursor_alist
, idx
); ++idx
;
5128 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5129 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5130 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5131 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5132 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5133 XSETFASTINT (buffer_local_flags
.cursor_in_non_selected_windows
, idx
); ++idx
;
5135 /* Need more room? */
5136 if (idx
>= MAX_PER_BUFFER_VARS
)
5138 last_per_buffer_idx
= idx
;
5140 Vbuffer_alist
= Qnil
;
5144 QSFundamental
= build_string ("Fundamental");
5146 Qfundamental_mode
= intern ("fundamental-mode");
5147 buffer_defaults
.major_mode
= Qfundamental_mode
;
5149 Qmode_class
= intern ("mode-class");
5151 Qprotected_field
= intern ("protected-field");
5153 Qpermanent_local
= intern ("permanent-local");
5155 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5156 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5158 Qucs_set_table_for_input
= intern ("ucs-set-table-for-input");
5160 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
5162 /* super-magic invisible buffer */
5163 Vbuffer_alist
= Qnil
;
5165 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5167 inhibit_modification_hooks
= 0;
5177 #ifdef USE_MMAP_FOR_BUFFERS
5179 /* When using the ralloc implementation based on mmap(2), buffer
5180 text pointers will have been set to null in the dumped Emacs.
5184 for (b
= all_buffers
; b
; b
= b
->next
)
5185 if (b
->text
->beg
== NULL
)
5186 enlarge_buffer_text (b
, 0);
5188 #endif /* USE_MMAP_FOR_BUFFERS */
5190 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5191 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5192 Fset_buffer_multibyte (Qnil
);
5194 pwd
= get_current_dir_name ();
5197 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5200 /* Maybe this should really use some standard subroutine
5201 whose definition is filename syntax dependent. */
5203 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5205 /* Grow buffer to add directory separator and '\0'. */
5206 pwd
= (char *) xrealloc (pwd
, len
+ 2);
5207 pwd
[len
] = DIRECTORY_SEP
;
5208 pwd
[len
+ 1] = '\0';
5210 #endif /* not VMS */
5212 current_buffer
->directory
= make_unibyte_string (pwd
, strlen (pwd
));
5213 if (! NILP (buffer_defaults
.enable_multibyte_characters
))
5214 /* At this moment, we still don't know how to decode the
5215 directory name. So, we keep the bytes in multibyte form so
5216 that ENCODE_FILE correctly gets the original bytes. */
5217 current_buffer
->directory
5218 = string_to_multibyte (current_buffer
->directory
);
5220 /* Add /: to the front of the name
5221 if it would otherwise be treated as magic. */
5222 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5224 /* If the default dir is just /, TEMP is non-nil
5225 because of the ange-ftp completion handler.
5226 However, it is not necessary to turn / into /:/.
5227 So avoid doing that. */
5228 && strcmp ("/", SDATA (current_buffer
->directory
)))
5229 current_buffer
->directory
5230 = concat2 (build_string ("/:"), current_buffer
->directory
);
5232 temp
= get_minibuffer (0);
5233 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5238 /* initialize the buffer routines */
5242 staticpro (&last_overlay_modification_hooks
);
5243 last_overlay_modification_hooks
5244 = Fmake_vector (make_number (10), Qnil
);
5246 staticpro (&Vbuffer_defaults
);
5247 staticpro (&Vbuffer_local_symbols
);
5248 staticpro (&Qfundamental_mode
);
5249 staticpro (&Qmode_class
);
5250 staticpro (&QSFundamental
);
5251 staticpro (&Vbuffer_alist
);
5252 staticpro (&Qprotected_field
);
5253 staticpro (&Qpermanent_local
);
5254 staticpro (&Qkill_buffer_hook
);
5255 Qoverlayp
= intern ("overlayp");
5256 staticpro (&Qoverlayp
);
5257 Qevaporate
= intern ("evaporate");
5258 staticpro (&Qevaporate
);
5259 Qmodification_hooks
= intern ("modification-hooks");
5260 staticpro (&Qmodification_hooks
);
5261 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5262 staticpro (&Qinsert_in_front_hooks
);
5263 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5264 staticpro (&Qinsert_behind_hooks
);
5265 Qget_file_buffer
= intern ("get-file-buffer");
5266 staticpro (&Qget_file_buffer
);
5267 Qpriority
= intern ("priority");
5268 staticpro (&Qpriority
);
5269 Qwindow
= intern ("window");
5270 staticpro (&Qwindow
);
5271 Qbefore_string
= intern ("before-string");
5272 staticpro (&Qbefore_string
);
5273 Qafter_string
= intern ("after-string");
5274 staticpro (&Qafter_string
);
5275 Qfirst_change_hook
= intern ("first-change-hook");
5276 staticpro (&Qfirst_change_hook
);
5277 Qbefore_change_functions
= intern ("before-change-functions");
5278 staticpro (&Qbefore_change_functions
);
5279 Qafter_change_functions
= intern ("after-change-functions");
5280 staticpro (&Qafter_change_functions
);
5281 staticpro (&Qucs_set_table_for_input
);
5283 Qkill_buffer_query_functions
= intern ("kill-buffer-query-functions");
5284 staticpro (&Qkill_buffer_query_functions
);
5286 Fput (Qprotected_field
, Qerror_conditions
,
5287 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5288 Fput (Qprotected_field
, Qerror_message
,
5289 build_string ("Attempt to modify a protected field"));
5291 /* All these use DEFVAR_LISP_NOPRO because the slots in
5292 buffer_defaults will all be marked via Vbuffer_defaults. */
5294 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5295 &buffer_defaults
.mode_line_format
,
5296 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5297 This is the same as (default-value 'mode-line-format). */);
5299 DEFVAR_LISP_NOPRO ("default-header-line-format",
5300 &buffer_defaults
.header_line_format
,
5301 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5302 This is the same as (default-value 'header-line-format). */);
5304 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5305 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5306 This is the same as (default-value 'cursor-type). */);
5308 DEFVAR_LISP_NOPRO ("default-line-spacing",
5309 &buffer_defaults
.extra_line_spacing
,
5310 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5311 This is the same as (default-value 'line-spacing). */);
5313 DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows",
5314 &buffer_defaults
.cursor_in_non_selected_windows
,
5315 doc
: /* Default value of `cursor-in-non-selected-windows'.
5316 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5318 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5319 &buffer_defaults
.abbrev_mode
,
5320 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5321 This is the same as (default-value 'abbrev-mode). */);
5323 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5324 &buffer_defaults
.ctl_arrow
,
5325 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5326 This is the same as (default-value 'ctl-arrow). */);
5328 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5329 &buffer_defaults
.direction_reversed
,
5330 doc
: /* Default value of `direction-reversed' for buffers that do not override it.
5331 This is the same as (default-value 'direction-reversed). */);
5333 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5334 &buffer_defaults
.enable_multibyte_characters
,
5335 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5336 This is the same as (default-value 'enable-multibyte-characters). */);
5338 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5339 &buffer_defaults
.buffer_file_coding_system
,
5340 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5341 This is the same as (default-value 'buffer-file-coding-system). */);
5343 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5344 &buffer_defaults
.truncate_lines
,
5345 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5346 This is the same as (default-value 'truncate-lines). */);
5348 DEFVAR_LISP_NOPRO ("default-fill-column",
5349 &buffer_defaults
.fill_column
,
5350 doc
: /* Default value of `fill-column' for buffers that do not override it.
5351 This is the same as (default-value 'fill-column). */);
5353 DEFVAR_LISP_NOPRO ("default-left-margin",
5354 &buffer_defaults
.left_margin
,
5355 doc
: /* Default value of `left-margin' for buffers that do not override it.
5356 This is the same as (default-value 'left-margin). */);
5358 DEFVAR_LISP_NOPRO ("default-tab-width",
5359 &buffer_defaults
.tab_width
,
5360 doc
: /* Default value of `tab-width' for buffers that do not override it.
5361 This is the same as (default-value 'tab-width). */);
5363 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5364 &buffer_defaults
.case_fold_search
,
5365 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5366 This is the same as (default-value 'case-fold-search). */);
5369 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5370 &buffer_defaults
.buffer_file_type
,
5371 doc
: /* Default file type for buffers that do not override it.
5372 This is the same as (default-value 'buffer-file-type).
5373 The file type is nil for text, t for binary. */);
5376 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5377 &buffer_defaults
.left_margin_cols
,
5378 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5379 This is the same as (default-value 'left-margin-width). */);
5381 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5382 &buffer_defaults
.right_margin_cols
,
5383 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5384 This is the same as (default-value 'right-margin-width). */);
5386 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5387 &buffer_defaults
.left_fringe_width
,
5388 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5389 This is the same as (default-value 'left-fringe-width). */);
5391 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5392 &buffer_defaults
.right_fringe_width
,
5393 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5394 This is the same as (default-value 'right-fringe-width). */);
5396 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5397 &buffer_defaults
.fringes_outside_margins
,
5398 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5399 This is the same as (default-value 'fringes-outside-margins). */);
5401 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5402 &buffer_defaults
.scroll_bar_width
,
5403 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5404 This is the same as (default-value 'scroll-bar-width). */);
5406 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5407 &buffer_defaults
.vertical_scroll_bar_type
,
5408 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5409 This is the same as (default-value 'vertical-scroll-bar). */);
5411 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5412 &buffer_defaults
.indicate_empty_lines
,
5413 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5414 This is the same as (default-value 'indicate-empty-lines). */);
5416 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5417 &buffer_defaults
.indicate_buffer_boundaries
,
5418 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5419 This is the same as (default-value 'indicate-buffer-boundaries). */);
5421 DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist",
5422 &buffer_defaults
.fringe_indicator_alist
,
5423 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5424 This is the same as (default-value 'fringe-indicator-alist'). */);
5426 DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist",
5427 &buffer_defaults
.fringe_cursor_alist
,
5428 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5429 This is the same as (default-value 'fringe-cursor-alist'). */);
5431 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5432 &buffer_defaults
.scroll_up_aggressively
,
5433 doc
: /* Default value of `scroll-up-aggressively'.
5434 This value applies in buffers that don't have their own local values.
5435 This is the same as (default-value 'scroll-up-aggressively). */);
5437 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5438 &buffer_defaults
.scroll_down_aggressively
,
5439 doc
: /* Default value of `scroll-down-aggressively'.
5440 This value applies in buffers that don't have their own local values.
5441 This is the same as (default-value 'scroll-down-aggressively). */);
5443 DEFVAR_PER_BUFFER ("header-line-format",
5444 ¤t_buffer
->header_line_format
,
5446 doc
: /* Analogous to `mode-line-format', but controls the header line.
5447 The header line appears, optionally, at the top of a window;
5448 the mode line appears at the bottom. */);
5450 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5452 doc
: /* Template for displaying mode line for current buffer.
5453 Each buffer has its own value of this variable.
5454 Value may be nil, a string, a symbol or a list or cons cell.
5455 A value of nil means don't display a mode line.
5456 For a symbol, its value is used (but it is ignored if t or nil).
5457 A string appearing directly as the value of a symbol is processed verbatim
5458 in that the %-constructs below are not recognized.
5459 Note that unless the symbol is marked as a `risky-local-variable', all
5460 properties in any strings, as well as all :eval and :propertize forms
5461 in the value of that symbol will be ignored.
5462 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5463 is used as a mode line element. Be careful--FORM should not load any files,
5464 because that can cause an infinite recursion.
5465 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5466 with the specified properties PROPS applied.
5467 For a list whose car is a symbol, the symbol's value is taken,
5468 and if that is non-nil, the cadr of the list is processed recursively.
5469 Otherwise, the caddr of the list (if there is one) is processed.
5470 For a list whose car is a string or list, each element is processed
5471 recursively and the results are effectively concatenated.
5472 For a list whose car is an integer, the cdr of the list is processed
5473 and padded (if the number is positive) or truncated (if negative)
5474 to the width specified by that number.
5475 A string is printed verbatim in the mode line except for %-constructs:
5476 (%-constructs are allowed when the string is the entire mode-line-format
5477 or when it is found in a cons-cell or a list)
5478 %b -- print buffer name. %f -- print visited file name.
5479 %F -- print frame name.
5480 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5481 %& is like %*, but ignore read-only-ness.
5482 % means buffer is read-only and * means it is modified.
5483 For a modified read-only buffer, %* gives % and %+ gives *.
5484 %s -- print process status. %l -- print the current line number.
5485 %c -- print the current column number (this makes editing slower).
5486 To make the column number update correctly in all cases,
5487 `column-number-mode' must be non-nil.
5488 %i -- print the size of the buffer.
5489 %I -- like %i, but use k, M, G, etc., to abbreviate.
5490 %p -- print percent of buffer above top of window, or Top, Bot or All.
5491 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5492 or print Bottom or All.
5493 %n -- print Narrow if appropriate.
5494 %t -- visited file is text or binary (if OS supports this distinction).
5495 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5496 %Z -- like %z, but including the end-of-line format.
5497 %e -- print error message about full memory.
5498 %[ -- print one [ for each recursive editing level. %] similar.
5499 %% -- print %. %- -- print infinitely many dashes.
5500 Decimal digits after the % specify field width to which to pad. */);
5502 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5503 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5504 A value of nil means use current buffer's major mode,
5505 provided it is not marked as "special".
5507 When a mode is used by default, `find-file' switches to it
5508 before it reads the contents into the buffer and before
5509 it finishes setting up the buffer. Thus, the mode and
5510 its hooks should not expect certain variables such as
5511 `buffer-read-only' and `buffer-file-coding-system' to be set up. */);
5513 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5514 make_number (Lisp_Symbol
),
5515 doc
: /* Symbol for current buffer's major mode. */);
5517 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5519 doc
: /* Pretty name of current buffer's major mode (a string). */);
5521 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5522 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5524 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5526 doc
: /* *Non-nil if searches and matches should ignore case. */);
5528 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5529 make_number (Lisp_Int
),
5530 doc
: /* *Column beyond which automatic line-wrapping should happen.
5531 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5533 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5534 make_number (Lisp_Int
),
5535 doc
: /* *Column for the default `indent-line-function' to indent to.
5536 Linefeed indents to this column in Fundamental mode. */);
5538 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5539 make_number (Lisp_Int
),
5540 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5542 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5543 doc
: /* *Non-nil means display control chars with uparrow.
5544 A value of nil means use backslash and octal digits.
5545 This variable does not apply to characters whose display is specified
5546 in the current display table (if there is one). */);
5548 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5549 ¤t_buffer
->enable_multibyte_characters
,
5551 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5552 Otherwise they are regarded as unibyte. This affects the display,
5553 file I/O and the behavior of various editing commands.
5555 This variable is buffer-local but you cannot set it directly;
5556 use the function `set-buffer-multibyte' to change a buffer's representation.
5557 Changing its default value with `setq-default' is supported.
5558 See also variable `default-enable-multibyte-characters' and Info node
5559 `(elisp)Text Representations'. */);
5560 XSYMBOL (intern ("enable-multibyte-characters"))->constant
= 1;
5562 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5563 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5564 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5565 This variable applies to saving the buffer, and also to `write-region'
5566 and other functions that use `write-region'.
5567 It does not apply to sending output to subprocesses, however.
5569 If this is nil, the buffer is saved without any code conversion
5570 unless some coding system is specified in `file-coding-system-alist'
5571 for the buffer file.
5573 If the text to be saved cannot be encoded as specified by this variable,
5574 an alternative encoding is selected by `select-safe-coding-system', which see.
5576 The variable `coding-system-for-write', if non-nil, overrides this variable.
5578 This variable is never applied to a way of decoding a file while reading it. */);
5580 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5582 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5584 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5585 doc
: /* *Non-nil means do not display continuation lines.
5586 Instead, give each line of text just one screen line.
5588 Note that this is overridden by the variable
5589 `truncate-partial-width-windows' if that variable is non-nil
5590 and this buffer is not full-frame width. */);
5593 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5595 doc
: /* Non-nil if the visited file is a binary file.
5596 This variable is meaningful on MS-DOG and Windows NT.
5597 On those systems, it is automatically local in every buffer.
5598 On other systems, this variable is normally always nil. */);
5601 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5602 make_number (Lisp_String
),
5603 doc
: /* Name of default directory of current buffer. Should end with slash.
5604 To interactively change the default directory, use command `cd'. */);
5606 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5608 doc
: /* Function called (if non-nil) to perform auto-fill.
5609 It is called after self-inserting any character specified in
5610 the `auto-fill-chars' table.
5611 NOTE: This variable is not a hook;
5612 its value may not be a list of functions. */);
5614 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5615 make_number (Lisp_String
),
5616 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5618 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5619 make_number (Lisp_String
),
5620 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5621 The truename of a file is calculated by `file-truename'
5622 and then abbreviated with `abbreviate-file-name'. */);
5624 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5625 ¤t_buffer
->auto_save_file_name
,
5626 make_number (Lisp_String
),
5627 doc
: /* Name of file for auto-saving current buffer.
5628 If it is nil, that means don't auto-save this buffer. */);
5630 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5631 doc
: /* Non-nil if this buffer is read-only. */);
5633 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5634 doc
: /* Non-nil if this buffer's file has been backed up.
5635 Backing up is done before the first time the file is saved. */);
5637 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5638 make_number (Lisp_Int
),
5639 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5642 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5644 doc
: /* Non-nil enables selective display.
5645 An Integer N as value means display only lines
5646 that start with less than n columns of space.
5647 A value of t means that the character ^M makes itself and
5648 all the rest of the line invisible; also, when saving the buffer
5649 in a file, save the ^M as a newline. */);
5652 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5653 ¤t_buffer
->selective_display_ellipses
,
5655 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5658 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5659 doc
: /* Non-nil if self-insertion should replace existing text.
5660 The value should be one of `overwrite-mode-textual',
5661 `overwrite-mode-binary', or nil.
5662 If it is `overwrite-mode-textual', self-insertion still
5663 inserts at the end of a line, and inserts when point is before a tab,
5664 until the tab is filled in.
5665 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5667 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5669 doc
: /* Display table that controls display of the contents of current buffer.
5671 If this variable is nil, the value of `standard-display-table' is used.
5672 Each window can have its own, overriding display table, see
5673 `set-window-display-table' and `window-display-table'.
5675 The display table is a char-table created with `make-display-table'.
5676 A char-table is an array indexed by character codes. Normal array
5677 primitives `aref' and `aset' can be used to access elements of a char-table.
5679 Each of the char-table elements control how to display the corresponding
5680 text character: the element at index C in the table says how to display
5681 the character whose code is C. Each element should be a vector of
5682 characters or nil. nil means display the character in the default fashion;
5683 otherwise, the characters from the vector are delivered to the screen
5684 instead of the original character.
5686 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5687 a capital Y instead of each X character.
5689 In addition, a char-table has six extra slots to control the display of:
5691 the end of a truncated screen line (extra-slot 0, a single character);
5692 the end of a continued line (extra-slot 1, a single character);
5693 the escape character used to display character codes in octal
5694 (extra-slot 2, a single character);
5695 the character used as an arrow for control characters (extra-slot 3,
5696 a single character);
5697 the decoration indicating the presence of invisible lines (extra-slot 4,
5698 a vector of characters);
5699 the character used to draw the border between side-by-side windows
5700 (extra-slot 5, a single character).
5702 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5704 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5706 doc
: /* *Width of left marginal area for display of a buffer.
5707 A value of nil means no marginal area. */);
5709 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5711 doc
: /* *Width of right marginal area for display of a buffer.
5712 A value of nil means no marginal area. */);
5714 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5716 doc
: /* *Width of this buffer's left fringe (in pixels).
5717 A value of 0 means no left fringe is shown in this buffer's window.
5718 A value of nil means to use the left fringe width from the window's frame. */);
5720 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5722 doc
: /* *Width of this buffer's right fringe (in pixels).
5723 A value of 0 means no right fringe is shown in this buffer's window.
5724 A value of nil means to use the right fringe width from the window's frame. */);
5726 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5728 doc
: /* *Non-nil means to display fringes outside display margins.
5729 A value of nil means to display fringes between margins and buffer text. */);
5731 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5733 doc
: /* *Width of this buffer's scroll bars in pixels.
5734 A value of nil means to use the scroll bar width from the window's frame. */);
5736 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5738 doc
: /* *Position of this buffer's vertical scroll bar.
5739 The value takes effect whenever you tell a window to display this buffer;
5740 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5742 A value of `left' or `right' means put the vertical scroll bar at that side
5743 of the window; a value of nil means don't show any vertical scroll bars.
5744 A value of t (the default) means do whatever the window's frame specifies. */);
5746 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5747 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5748 doc
: /* *Visually indicate empty lines after the buffer end.
5749 If non-nil, a bitmap is displayed in the left fringe of a window on
5750 window-systems. */);
5752 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5753 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
5754 doc
: /* *Visually indicate buffer boundaries and scrolling.
5755 If non-nil, the first and last line of the buffer are marked in the fringe
5756 of a window on window-systems with angle bitmaps, or if the window can be
5757 scrolled, the top and bottom line of the window are marked with up and down
5760 If value is a symbol `left' or `right', both angle and arrow bitmaps
5761 are displayed in the left or right fringe, resp. Any other value
5762 that doesn't look like an alist means display the angle bitmaps in
5763 the left fringe but no arrows.
5765 You can exercise more precise control by using an alist as the
5766 value. Each alist element (INDICATOR . POSITION) specifies
5767 where to show one of the indicators. INDICATOR is one of `top',
5768 `bottom', `up', `down', or t, which specifies the default position,
5769 and POSITION is one of `left', `right', or nil, meaning do not show
5772 For example, ((top . left) (t . right)) places the top angle bitmap in
5773 left fringe, the bottom angle bitmap in right fringe, and both arrow
5774 bitmaps in right fringe. To show just the angle bitmaps in the left
5775 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5777 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5778 ¤t_buffer
->fringe_indicator_alist
, Qnil
,
5779 doc
: /* *Mapping from logical to physical fringe indicator bitmaps.
5780 The value is an alist where each element (INDICATOR . BITMAPS)
5781 specifies the fringe bitmaps used to display a specific logical
5784 INDICATOR specifies the logical indicator type which is one of the
5785 following symbols: `truncation' , `continuation', `overlay-arrow',
5786 `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'.
5788 BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5789 the actual bitmap shown in the left or right fringe for the logical
5790 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5791 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5792 are used only for the `bottom' and `one-line' indicators when the last
5793 \(only) line in has no final newline. BITMAPS may also be a single
5794 symbol which is used in both left and right fringes. */);
5796 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5797 ¤t_buffer
->fringe_cursor_alist
, Qnil
,
5798 doc
: /* *Mapping from logical to physical fringe cursor bitmaps.
5799 The value is an alist where each element (CURSOR . BITMAP)
5800 specifies the fringe bitmaps used to display a specific logical
5801 cursor type in the fringe.
5803 CURSOR specifies the logical cursor type which is one of the following
5804 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5805 one is used to show a hollow cursor on narrow lines display lines
5806 where the normal hollow cursor will not fit.
5808 BITMAP is the corresponding fringe bitmap shown for the logical
5811 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5812 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5813 doc
: /* How far to scroll windows upward.
5814 If you move point off the bottom, the window scrolls automatically.
5815 This variable controls how far it scrolls. nil, the default,
5816 means scroll to center point. A fraction means scroll to put point
5817 that fraction of the window's height from the bottom of the window.
5818 When the value is 0.0, point goes at the bottom line, which in the simple
5819 case that you moved off with C-f means scrolling just one line. 1.0 means
5820 point goes at the top, so that in that simple case, the window
5821 scrolls by a full window height. Meaningful values are
5822 between 0.0 and 1.0, inclusive. */);
5824 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5825 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5826 doc
: /* How far to scroll windows downward.
5827 If you move point off the top, the window scrolls automatically.
5828 This variable controls how far it scrolls. nil, the default,
5829 means scroll to center point. A fraction means scroll to put point
5830 that fraction of the window's height from the top of the window.
5831 When the value is 0.0, point goes at the top line, which in the simple
5832 case that you moved off with C-b means scrolling just one line. 1.0 means
5833 point goes at the bottom, so that in that simple case, the window
5834 scrolls by a full window height. Meaningful values are
5835 between 0.0 and 1.0, inclusive. */);
5837 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5841 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5842 doc
: /* List of functions to call before each text change.
5843 Two arguments are passed to each function: the positions of
5844 the beginning and end of the range of old text to be changed.
5845 \(For an insertion, the beginning and end are at the same place.)
5846 No information is given about the length of the text after the change.
5848 Buffer changes made while executing the `before-change-functions'
5849 don't call any before-change or after-change functions.
5850 That's because these variables are temporarily set to nil.
5851 As a result, a hook function cannot straightforwardly alter the value of
5852 these variables. See the Emacs Lisp manual for a way of
5853 accomplishing an equivalent result by using other variables.
5855 If an unhandled error happens in running these functions,
5856 the variable's value remains nil. That prevents the error
5857 from happening repeatedly and making Emacs nonfunctional. */);
5858 Vbefore_change_functions
= Qnil
;
5860 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5861 doc
: /* List of functions to call after each text change.
5862 Three arguments are passed to each function: the positions of
5863 the beginning and end of the range of changed text,
5864 and the length in bytes of the pre-change text replaced by that range.
5865 \(For an insertion, the pre-change length is zero;
5866 for a deletion, that length is the number of bytes deleted,
5867 and the post-change beginning and end are at the same place.)
5869 Buffer changes made while executing the `after-change-functions'
5870 don't call any before-change or after-change functions.
5871 That's because these variables are temporarily set to nil.
5872 As a result, a hook function cannot straightforwardly alter the value of
5873 these variables. See the Emacs Lisp manual for a way of
5874 accomplishing an equivalent result by using other variables.
5876 If an unhandled error happens in running these functions,
5877 the variable's value remains nil. That prevents the error
5878 from happening repeatedly and making Emacs nonfunctional. */);
5879 Vafter_change_functions
= Qnil
;
5881 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5882 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5883 The functions are run using the `run-hooks' function. */);
5884 Vfirst_change_hook
= Qnil
;
5886 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5887 doc
: /* List of undo entries in current buffer.
5888 Recent changes come first; older changes follow newer.
5890 An entry (BEG . END) represents an insertion which begins at
5891 position BEG and ends at position END.
5893 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5894 from (abs POSITION). If POSITION is positive, point was at the front
5895 of the text being deleted; if negative, point was at the end.
5897 An entry (t HIGH . LOW) indicates that the buffer previously had
5898 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5899 of the visited file's modification time, as of that time. If the
5900 modification time of the most recent save is different, this entry is
5903 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5904 was modified between BEG and END. PROPERTY is the property name,
5905 and VALUE is the old value.
5907 An entry (apply FUN-NAME . ARGS) means undo the change with
5908 \(apply FUN-NAME ARGS).
5910 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5911 in the active region. BEG and END is the range affected by this entry
5912 and DELTA is the number of bytes added or deleted in that range by
5915 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5916 was adjusted in position by the offset DISTANCE (an integer).
5918 An entry of the form POSITION indicates that point was at the buffer
5919 location given by the integer. Undoing an entry of this form places
5922 Entries with value `nil' mark undo boundaries. The undo command treats
5923 the changes between two undo boundaries as a single step to be undone.
5925 If the value of the variable is t, undo information is not recorded. */);
5927 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5928 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5930 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5931 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5933 Normally, the line-motion functions work by scanning the buffer for
5934 newlines. Columnar operations (like `move-to-column' and
5935 `compute-motion') also work by scanning the buffer, summing character
5936 widths as they go. This works well for ordinary text, but if the
5937 buffer's lines are very long (say, more than 500 characters), these
5938 motion functions will take longer to execute. Emacs may also take
5939 longer to update the display.
5941 If `cache-long-line-scans' is non-nil, these motion functions cache the
5942 results of their scans, and consult the cache to avoid rescanning
5943 regions of the buffer until the text is modified. The caches are most
5944 beneficial when they prevent the most searching---that is, when the
5945 buffer contains long lines and large regions of characters with the
5946 same, fixed screen width.
5948 When `cache-long-line-scans' is non-nil, processing short lines will
5949 become slightly slower (because of the overhead of consulting the
5950 cache), and the caches will use memory roughly proportional to the
5951 number of newlines and characters whose screen width varies.
5953 The caches require no explicit maintenance; their accuracy is
5954 maintained internally by the Emacs primitives. Enabling or disabling
5955 the cache should not affect the behavior of any of the motion
5956 functions; it should only affect their performance. */);
5958 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5959 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5961 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5962 doc
: /* List of formats to use when saving this buffer.
5963 Formats are defined by `format-alist'. This variable is
5964 set when a file is visited. */);
5966 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5967 ¤t_buffer
->auto_save_file_format
, Qnil
,
5968 doc
: /* *Format in which to write auto-save files.
5969 Should be a list of symbols naming formats that are defined in `format-alist'.
5970 If it is t, which is the default, auto-save files are written in the
5971 same format as a regular save would use. */);
5973 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5974 ¤t_buffer
->invisibility_spec
, Qnil
,
5975 doc
: /* Invisibility spec of this buffer.
5976 The default is t, which means that text is invisible
5977 if it has a non-nil `invisible' property.
5978 If the value is a list, a text character is invisible if its `invisible'
5979 property is an element in that list.
5980 If an element is a cons cell of the form (PROP . ELLIPSIS),
5981 then characters with property value PROP are invisible,
5982 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5984 DEFVAR_PER_BUFFER ("buffer-display-count",
5985 ¤t_buffer
->display_count
, Qnil
,
5986 doc
: /* A number incremented each time this buffer is displayed in a window.
5987 The function `set-window-buffer' increments it. */);
5989 DEFVAR_PER_BUFFER ("buffer-display-time",
5990 ¤t_buffer
->display_time
, Qnil
,
5991 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5992 The function `set-window-buffer' updates this variable
5993 to the value obtained by calling `current-time'.
5994 If the buffer has never been shown in a window, the value is nil. */);
5996 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5997 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5998 Non-nil also enables highlighting of the region whenever the mark is active.
5999 The variable `highlight-nonselected-windows' controls whether to highlight
6000 all windows or just the selected window.
6002 If the value is `lambda', that enables Transient Mark mode temporarily
6003 until the next buffer modification. If a command sets the value to `only',
6004 that enables Transient Mark mode for the following command only.
6005 During that following command, the value of `transient-mark-mode'
6006 is `identity'. If it is still `identity' at the end of that command,
6007 it changes to nil. */);
6008 Vtransient_mark_mode
= Qnil
;
6010 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
6011 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
6012 If the value is t, disregard `buffer-read-only' and all `read-only'
6013 text properties. If the value is a list, disregard `buffer-read-only'
6014 and disregard a `read-only' text property if the property value
6015 is a member of the list. */);
6016 Vinhibit_read_only
= Qnil
;
6018 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
6019 doc
: /* Cursor to use when this buffer is in the selected window.
6020 Values are interpreted as follows:
6022 t use the cursor specified for the frame
6023 nil don't display a cursor
6024 box display a filled box cursor
6025 hollow display a hollow box cursor
6026 bar display a vertical bar cursor with default width
6027 (bar . WIDTH) display a vertical bar cursor with width WIDTH
6028 hbar display a horizontal bar cursor with default height
6029 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
6030 ANYTHING ELSE display a hollow box cursor
6032 When the buffer is displayed in a nonselected window,
6033 this variable has no effect; the cursor appears as a hollow box. */);
6035 DEFVAR_PER_BUFFER ("line-spacing",
6036 ¤t_buffer
->extra_line_spacing
, Qnil
,
6037 doc
: /* Additional space to put between lines when displaying a buffer.
6038 The space is measured in pixels, and put below lines on window systems.
6039 If value is a floating point number, it specifies the spacing relative
6040 to the default frame line height. A value of nil means add no extra space. */);
6042 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
6043 ¤t_buffer
->cursor_in_non_selected_windows
, Qnil
,
6044 doc
: /* *Cursor type to display in non-selected windows.
6045 The value t means to use hollow box cursor. See `cursor-type' for other values. */);
6047 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
6048 doc
: /* List of functions called with no args to query before killing a buffer.
6049 The buffer being killed will be current while the functions are running.
6050 If any of them returns nil, the buffer is not killed. */);
6051 Vkill_buffer_query_functions
= Qnil
;
6053 DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook
,
6054 doc
: /* Normal hook run before changing the major mode of a buffer.
6055 The function `kill-all-local-variables' runs this before doing anything else. */);
6056 Vchange_major_mode_hook
= Qnil
;
6057 Qchange_major_mode_hook
= intern ("change-major-mode-hook");
6058 staticpro (&Qchange_major_mode_hook
);
6060 defsubr (&Sbuffer_live_p
);
6061 defsubr (&Sbuffer_list
);
6062 defsubr (&Sget_buffer
);
6063 defsubr (&Sget_file_buffer
);
6064 defsubr (&Sget_buffer_create
);
6065 defsubr (&Smake_indirect_buffer
);
6066 defsubr (&Sgenerate_new_buffer_name
);
6067 defsubr (&Sbuffer_name
);
6068 /*defsubr (&Sbuffer_number);*/
6069 defsubr (&Sbuffer_file_name
);
6070 defsubr (&Sbuffer_base_buffer
);
6071 defsubr (&Sbuffer_local_value
);
6072 defsubr (&Sbuffer_local_variables
);
6073 defsubr (&Sbuffer_modified_p
);
6074 defsubr (&Sset_buffer_modified_p
);
6075 defsubr (&Sbuffer_modified_tick
);
6076 defsubr (&Sbuffer_chars_modified_tick
);
6077 defsubr (&Srename_buffer
);
6078 defsubr (&Sother_buffer
);
6079 defsubr (&Sbuffer_enable_undo
);
6080 defsubr (&Skill_buffer
);
6081 defsubr (&Sset_buffer_major_mode
);
6082 defsubr (&Sswitch_to_buffer
);
6083 defsubr (&Spop_to_buffer
);
6084 defsubr (&Scurrent_buffer
);
6085 defsubr (&Sset_buffer
);
6086 defsubr (&Sbarf_if_buffer_read_only
);
6087 defsubr (&Sbury_buffer
);
6088 defsubr (&Serase_buffer
);
6089 defsubr (&Sset_buffer_multibyte
);
6090 defsubr (&Skill_all_local_variables
);
6092 defsubr (&Soverlayp
);
6093 defsubr (&Smake_overlay
);
6094 defsubr (&Sdelete_overlay
);
6095 defsubr (&Smove_overlay
);
6096 defsubr (&Soverlay_start
);
6097 defsubr (&Soverlay_end
);
6098 defsubr (&Soverlay_buffer
);
6099 defsubr (&Soverlay_properties
);
6100 defsubr (&Soverlays_at
);
6101 defsubr (&Soverlays_in
);
6102 defsubr (&Snext_overlay_change
);
6103 defsubr (&Sprevious_overlay_change
);
6104 defsubr (&Soverlay_recenter
);
6105 defsubr (&Soverlay_lists
);
6106 defsubr (&Soverlay_get
);
6107 defsubr (&Soverlay_put
);
6108 defsubr (&Srestore_buffer_modified_p
);
6114 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6115 initial_define_key (control_x_map
, 'k', "kill-buffer");
6117 /* This must not be in syms_of_buffer, because Qdisabled is not
6118 initialized when that function gets called. */
6119 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
6122 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
6123 (do not change this comment) */