1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000, 2001, 02, 03, 2004
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include <sys/types.h>
26 #include <sys/param.h>
35 /* in 4.1 [probably SunOS? -stef] , param.h fails to define this. */
36 #define MAXPATHLEN 1024
37 #endif /* not MAXPATHLEN */
44 #include "intervals.h"
49 #include "region-cache.h"
51 #include "blockinput.h"
56 struct buffer
*current_buffer
; /* the current buffer */
58 /* First buffer in chain of all buffers (in reverse order of creation).
59 Threaded through ->next. */
61 struct buffer
*all_buffers
;
63 /* This structure holds the default values of the buffer-local variables
64 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
65 The default value occupies the same slot in this structure
66 as an individual buffer's value occupies in that buffer.
67 Setting the default value also goes through the alist of buffers
68 and stores into each buffer that does not say it has a local value. */
70 DECL_ALIGN (struct buffer
, buffer_defaults
);
72 /* A Lisp_Object pointer to the above, used for staticpro */
74 static Lisp_Object Vbuffer_defaults
;
76 /* This structure marks which slots in a buffer have corresponding
77 default values in buffer_defaults.
78 Each such slot has a nonzero value in this structure.
79 The value has only one nonzero bit.
81 When a buffer has its own local value for a slot,
82 the entry for that slot (found in the same slot in this structure)
83 is turned on in the buffer's local_flags array.
85 If a slot in this structure is -1, then even though there may
86 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
87 and the corresponding slot in buffer_defaults is not used.
89 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
90 but there is a default value which is copied into each buffer.
92 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
93 zero, that is a bug */
95 struct buffer buffer_local_flags
;
97 /* This structure holds the names of symbols whose values may be
98 buffer-local. It is indexed and accessed in the same way as the above. */
100 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
102 /* A Lisp_Object pointer to the above, used for staticpro */
103 static Lisp_Object Vbuffer_local_symbols
;
105 /* This structure holds the required types for the values in the
106 buffer-local slots. If a slot contains Qnil, then the
107 corresponding buffer slot may contain a value of any type. If a
108 slot contains an integer, then prospective values' tags must be
109 equal to that integer (except nil is always allowed).
110 When a tag does not match, the function
111 buffer_slot_type_mismatch will signal an error.
113 If a slot here contains -1, the corresponding variable is read-only. */
114 struct buffer buffer_local_types
;
116 /* Flags indicating which built-in buffer-local variables
117 are permanent locals. */
118 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
120 /* Number of per-buffer variables used. */
122 int last_per_buffer_idx
;
124 Lisp_Object
Fset_buffer ();
125 void set_buffer_internal ();
126 void set_buffer_internal_1 ();
127 static void call_overlay_mod_hooks ();
128 static void swap_out_buffer_local_variables ();
129 static void reset_buffer_local_variables ();
131 /* Alist of all buffer names vs the buffers. */
132 /* This used to be a variable, but is no longer,
133 to prevent lossage due to user rplac'ing this alist or its elements. */
134 Lisp_Object Vbuffer_alist
;
136 /* Functions to call before and after each text change. */
137 Lisp_Object Vbefore_change_functions
;
138 Lisp_Object Vafter_change_functions
;
140 Lisp_Object Vtransient_mark_mode
;
142 /* t means ignore all read-only text properties.
143 A list means ignore such a property if its value is a member of the list.
144 Any non-nil value means ignore buffer-read-only. */
145 Lisp_Object Vinhibit_read_only
;
147 /* List of functions to call that can query about killing a buffer.
148 If any of these functions returns nil, we don't kill it. */
149 Lisp_Object Vkill_buffer_query_functions
;
150 Lisp_Object Qkill_buffer_query_functions
;
152 /* List of functions to call before changing an unmodified buffer. */
153 Lisp_Object Vfirst_change_hook
;
155 Lisp_Object Qfirst_change_hook
;
156 Lisp_Object Qbefore_change_functions
;
157 Lisp_Object Qafter_change_functions
;
158 Lisp_Object Qucs_set_table_for_input
;
160 /* If nonzero, all modification hooks are suppressed. */
161 int inhibit_modification_hooks
;
163 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
165 Lisp_Object Qprotected_field
;
167 Lisp_Object QSFundamental
; /* A string "Fundamental" */
169 Lisp_Object Qkill_buffer_hook
;
171 Lisp_Object Qget_file_buffer
;
173 Lisp_Object Qoverlayp
;
175 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
177 Lisp_Object Qmodification_hooks
;
178 Lisp_Object Qinsert_in_front_hooks
;
179 Lisp_Object Qinsert_behind_hooks
;
181 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
182 static void free_buffer_text
P_ ((struct buffer
*b
));
183 static struct Lisp_Overlay
* copy_overlays
P_ ((struct buffer
*, struct Lisp_Overlay
*));
184 static void modify_overlay
P_ ((struct buffer
*, EMACS_INT
, EMACS_INT
));
187 /* For debugging; temporary. See set_buffer_internal. */
188 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
195 error ("No buffer named %s", SDATA (spec
));
196 error ("Invalid buffer argument");
199 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
200 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
201 Value is nil if OBJECT is not a buffer or if it has been killed. */)
205 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
209 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
210 doc
: /* Return a list of all existing live buffers.
211 If the optional arg FRAME is a frame, we return the buffer list
212 in the proper order for that frame: the buffers in FRAME's `buffer-list'
213 frame parameter come first, followed by the rest of the buffers. */)
217 Lisp_Object framelist
, general
;
218 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
226 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
228 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
230 while (! NILP (tail
))
232 general
= Fdelq (XCAR (tail
), general
);
235 return nconc2 (framelist
, general
);
241 /* Like Fassoc, but use Fstring_equal to compare
242 (which ignores text properties),
243 and don't ever QUIT. */
246 assoc_ignore_text_properties (key
, list
)
247 register Lisp_Object key
;
250 register Lisp_Object tail
;
251 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
253 register Lisp_Object elt
, tem
;
255 tem
= Fstring_equal (Fcar (elt
), key
);
262 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
263 doc
: /* Return the buffer named NAME (a string).
264 If there is no live buffer named NAME, return nil.
265 NAME may also be a buffer; if so, the value is that buffer. */)
267 register Lisp_Object name
;
273 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
276 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
277 doc
: /* Return the buffer visiting file FILENAME (a string).
278 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
279 If there is no such live buffer, return nil.
280 See also `find-buffer-visiting'. */)
282 register Lisp_Object filename
;
284 register Lisp_Object tail
, buf
, tem
;
287 CHECK_STRING (filename
);
288 filename
= Fexpand_file_name (filename
, Qnil
);
290 /* If the file name has special constructs in it,
291 call the corresponding file handler. */
292 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
294 return call2 (handler
, Qget_file_buffer
, filename
);
296 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
298 buf
= Fcdr (XCAR (tail
));
299 if (!BUFFERP (buf
)) continue;
300 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
301 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
309 get_truename_buffer (filename
)
310 register Lisp_Object filename
;
312 register Lisp_Object tail
, buf
, tem
;
314 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
316 buf
= Fcdr (XCAR (tail
));
317 if (!BUFFERP (buf
)) continue;
318 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
319 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
326 /* Incremented for each buffer created, to assign the buffer number. */
329 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
330 doc
: /* Return the buffer named NAME, or create such a buffer and return it.
331 A new buffer is created if there is no live buffer named NAME.
332 If NAME starts with a space, the new buffer does not keep undo information.
333 If NAME is a buffer instead of a string, then it is the value returned.
334 The value is never nil. */)
336 register Lisp_Object name
;
338 register Lisp_Object buf
;
339 register struct buffer
*b
;
341 buf
= Fget_buffer (name
);
345 if (SCHARS (name
) == 0)
346 error ("Empty string for buffer name is not allowed");
348 b
= (struct buffer
*) allocate_buffer ();
350 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
352 /* An ordinary buffer uses its own struct buffer_text. */
353 b
->text
= &b
->own_text
;
356 BUF_GAP_SIZE (b
) = 20;
358 /* We allocate extra 1-byte at the tail and keep it always '\0' for
359 anchoring a search. */
360 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
362 if (! BUF_BEG_ADDR (b
))
363 buffer_memory_full ();
370 BUF_PT_BYTE (b
) = BEG_BYTE
;
371 BUF_GPT_BYTE (b
) = BEG_BYTE
;
372 BUF_BEGV_BYTE (b
) = BEG_BYTE
;
373 BUF_ZV_BYTE (b
) = BEG_BYTE
;
374 BUF_Z_BYTE (b
) = BEG_BYTE
;
376 BUF_OVERLAY_MODIFF (b
) = 1;
377 BUF_SAVE_MODIFF (b
) = 1;
378 BUF_INTERVALS (b
) = 0;
379 BUF_UNCHANGED_MODIFIED (b
) = 1;
380 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
381 BUF_END_UNCHANGED (b
) = 0;
382 BUF_BEG_UNCHANGED (b
) = 0;
383 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
385 b
->newline_cache
= 0;
386 b
->width_run_cache
= 0;
387 b
->width_table
= Qnil
;
388 b
->prevent_redisplay_optimizations_p
= 1;
390 /* Put this on the chain of all buffers including killed ones. */
391 b
->next
= all_buffers
;
394 /* An ordinary buffer normally doesn't need markers
395 to handle BEGV and ZV. */
397 b
->begv_marker
= Qnil
;
400 name
= Fcopy_sequence (name
);
401 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
404 if (SREF (name
, 0) != ' ')
410 reset_buffer_local_variables (b
, 1);
412 b
->mark
= Fmake_marker ();
413 BUF_MARKERS (b
) = NULL
;
416 /* Put this in the alist of all live buffers. */
418 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
420 /* An error in calling the function here (should someone redfine it)
421 can lead to infinite regress until you run out of stack. rms
422 says that's not worth protecting against. */
423 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
424 /* buf is on buffer-alist, so no gcpro. */
425 call1 (Qucs_set_table_for_input
, buf
);
431 /* Return a list of overlays which is a copy of the overlay list
432 LIST, but for buffer B. */
434 static struct Lisp_Overlay
*
435 copy_overlays (b
, list
)
437 struct Lisp_Overlay
*list
;
440 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
442 XSETBUFFER (buffer
, b
);
444 for (; list
; list
= list
->next
)
446 Lisp_Object overlay
, start
, end
, old_overlay
;
449 XSETMISC (old_overlay
, list
);
450 charpos
= marker_position (OVERLAY_START (old_overlay
));
451 start
= Fmake_marker ();
452 Fset_marker (start
, make_number (charpos
), buffer
);
453 XMARKER (start
)->insertion_type
454 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
456 charpos
= marker_position (OVERLAY_END (old_overlay
));
457 end
= Fmake_marker ();
458 Fset_marker (end
, make_number (charpos
), buffer
);
459 XMARKER (end
)->insertion_type
460 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
462 overlay
= allocate_misc ();
463 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
464 OVERLAY_START (overlay
) = start
;
465 OVERLAY_END (overlay
) = end
;
466 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
467 XOVERLAY (overlay
)->next
= NULL
;
470 tail
= tail
->next
= XOVERLAY (overlay
);
472 result
= tail
= XOVERLAY (overlay
);
479 /* Clone per-buffer values of buffer FROM.
481 Buffer TO gets the same per-buffer values as FROM, with the
482 following exceptions: (1) TO's name is left untouched, (2) markers
483 are copied and made to refer to TO, and (3) overlay lists are
487 clone_per_buffer_values (from
, to
)
488 struct buffer
*from
, *to
;
490 Lisp_Object to_buffer
;
493 XSETBUFFER (to_buffer
, to
);
495 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
497 offset
+= sizeof (Lisp_Object
))
501 obj
= PER_BUFFER_VALUE (from
, offset
);
504 struct Lisp_Marker
*m
= XMARKER (obj
);
505 obj
= Fmake_marker ();
506 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
507 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
510 PER_BUFFER_VALUE (to
, offset
) = obj
;
513 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
515 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
516 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
520 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
522 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
523 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
524 BASE-BUFFER should be an existing buffer (or buffer name).
525 NAME should be a string which is not the name of an existing buffer.
526 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
527 such as major and minor modes, in the indirect buffer.
528 CLONE nil means the indirect buffer's state is reset to default values. */)
529 (base_buffer
, name
, clone
)
530 Lisp_Object base_buffer
, name
, clone
;
535 buf
= Fget_buffer (name
);
537 error ("Buffer name `%s' is in use", SDATA (name
));
539 base_buffer
= Fget_buffer (base_buffer
);
540 if (NILP (base_buffer
))
541 error ("No such buffer: `%s'", SDATA (name
));
543 if (SCHARS (name
) == 0)
544 error ("Empty string for buffer name is not allowed");
546 b
= (struct buffer
*) allocate_buffer ();
547 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
549 if (XBUFFER (base_buffer
)->base_buffer
)
550 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
552 b
->base_buffer
= XBUFFER (base_buffer
);
554 /* Use the base buffer's text object. */
555 b
->text
= b
->base_buffer
->text
;
557 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
558 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
559 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
560 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
561 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
562 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
564 b
->newline_cache
= 0;
565 b
->width_run_cache
= 0;
566 b
->width_table
= Qnil
;
568 /* Put this on the chain of all buffers including killed ones. */
569 b
->next
= all_buffers
;
572 name
= Fcopy_sequence (name
);
573 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
577 reset_buffer_local_variables (b
, 1);
579 /* Put this in the alist of all live buffers. */
581 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
583 b
->mark
= Fmake_marker ();
586 /* The multibyte status belongs to the base buffer. */
587 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
589 /* Make sure the base buffer has markers for its narrowing. */
590 if (NILP (b
->base_buffer
->pt_marker
))
592 b
->base_buffer
->pt_marker
= Fmake_marker ();
593 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
594 BUF_PT (b
->base_buffer
),
595 BUF_PT_BYTE (b
->base_buffer
));
597 if (NILP (b
->base_buffer
->begv_marker
))
599 b
->base_buffer
->begv_marker
= Fmake_marker ();
600 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
601 BUF_BEGV (b
->base_buffer
),
602 BUF_BEGV_BYTE (b
->base_buffer
));
604 if (NILP (b
->base_buffer
->zv_marker
))
606 b
->base_buffer
->zv_marker
= Fmake_marker ();
607 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
608 BUF_ZV (b
->base_buffer
),
609 BUF_ZV_BYTE (b
->base_buffer
));
610 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
615 /* Give the indirect buffer markers for its narrowing. */
616 b
->pt_marker
= Fmake_marker ();
617 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
618 b
->begv_marker
= Fmake_marker ();
619 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
620 b
->zv_marker
= Fmake_marker ();
621 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
622 XMARKER (b
->zv_marker
)->insertion_type
= 1;
625 clone_per_buffer_values (b
->base_buffer
, b
);
631 delete_all_overlays (b
)
636 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
637 have to empty the list, otherwise we end up with overlays that
638 think they belong to this buffer while the buffer doesn't know about
640 while (b
->overlays_before
)
642 XSETMISC (overlay
, b
->overlays_before
);
643 Fdelete_overlay (overlay
);
645 while (b
->overlays_after
)
647 XSETMISC (overlay
, b
->overlays_after
);
648 Fdelete_overlay (overlay
);
650 eassert (b
->overlays_before
== NULL
);
651 eassert (b
->overlays_after
== NULL
);
654 /* Reinitialize everything about a buffer except its name and contents
656 If called on an already-initialized buffer, the list of overlays
657 should be deleted before calling this function, otherwise we end up
658 with overlays that claim to belong to the buffer but the buffer
659 claims it doesn't belong to it. */
663 register struct buffer
*b
;
666 b
->file_truename
= Qnil
;
667 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
669 XSETFASTINT (b
->save_length
, 0);
670 b
->last_window_start
= 1;
671 /* It is more conservative to start out "changed" than "unchanged". */
673 b
->prevent_redisplay_optimizations_p
= 1;
675 b
->auto_save_modified
= 0;
676 b
->auto_save_failure_time
= -1;
677 b
->auto_save_file_name
= Qnil
;
679 b
->overlays_before
= NULL
;
680 b
->overlays_after
= NULL
;
681 b
->overlay_center
= BEG
;
682 b
->mark_active
= Qnil
;
683 b
->point_before_scroll
= Qnil
;
684 b
->file_format
= Qnil
;
685 b
->last_selected_window
= Qnil
;
686 XSETINT (b
->display_count
, 0);
687 b
->display_time
= Qnil
;
688 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
689 b
->cursor_type
= buffer_defaults
.cursor_type
;
690 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
692 b
->display_error_modiff
= 0;
695 /* Reset buffer B's local variables info.
696 Don't use this on a buffer that has already been in use;
697 it does not treat permanent locals consistently.
698 Instead, use Fkill_all_local_variables.
700 If PERMANENT_TOO is 1, then we reset permanent built-in
701 buffer-local variables. If PERMANENT_TOO is 0,
702 we preserve those. */
705 reset_buffer_local_variables (b
, permanent_too
)
706 register struct buffer
*b
;
712 /* Reset the major mode to Fundamental, together with all the
713 things that depend on the major mode.
714 default-major-mode is handled at a higher level.
715 We ignore it here. */
716 b
->major_mode
= Qfundamental_mode
;
718 b
->mode_name
= QSFundamental
;
719 b
->minor_modes
= Qnil
;
721 /* If the standard case table has been altered and invalidated,
722 fix up its insides first. */
723 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
724 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
725 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
726 Fset_standard_case_table (Vascii_downcase_table
);
728 b
->downcase_table
= Vascii_downcase_table
;
729 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
730 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
731 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
732 b
->invisibility_spec
= Qt
;
734 b
->buffer_file_type
= Qnil
;
737 /* Reset all (or most) per-buffer variables to their defaults. */
738 b
->local_var_alist
= Qnil
;
739 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
740 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
741 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
743 /* For each slot that has a default value,
744 copy that into the slot. */
746 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
748 offset
+= sizeof (Lisp_Object
))
750 int idx
= PER_BUFFER_IDX (offset
);
753 || buffer_permanent_local_flags
[idx
] == 0))
754 /* Is -2 used anywhere? */
756 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
760 /* We split this away from generate-new-buffer, because rename-buffer
761 and set-visited-file-name ought to be able to use this to really
762 rename the buffer properly. */
764 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
766 doc
: /* Return a string that is the name of no existing buffer based on NAME.
767 If there is no live buffer named NAME, then return NAME.
768 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
769 until an unused name is found, and then return that name.
770 Optional second argument IGNORE specifies a name that is okay to use
771 \(if it is in the sequence to be tried)
772 even if a buffer with that name exists. */)
774 register Lisp_Object name
, ignore
;
776 register Lisp_Object gentemp
, tem
;
782 tem
= Fget_buffer (name
);
789 sprintf (number
, "<%d>", ++count
);
790 gentemp
= concat2 (name
, build_string (number
));
791 tem
= Fstring_equal (gentemp
, ignore
);
794 tem
= Fget_buffer (gentemp
);
801 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
802 doc
: /* Return the name of BUFFER, as a string.
803 With no argument or nil as argument, return the name of the current buffer. */)
805 register Lisp_Object buffer
;
808 return current_buffer
->name
;
809 CHECK_BUFFER (buffer
);
810 return XBUFFER (buffer
)->name
;
813 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
814 doc
: /* Return name of file BUFFER is visiting, or nil if none.
815 No argument or nil as argument means use the current buffer. */)
817 register Lisp_Object buffer
;
820 return current_buffer
->filename
;
821 CHECK_BUFFER (buffer
);
822 return XBUFFER (buffer
)->filename
;
825 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
827 doc
: /* Return the base buffer of indirect buffer BUFFER.
828 If BUFFER is not indirect, return nil. */)
830 register Lisp_Object buffer
;
833 Lisp_Object base_buffer
;
836 base
= current_buffer
->base_buffer
;
839 CHECK_BUFFER (buffer
);
840 base
= XBUFFER (buffer
)->base_buffer
;
845 XSETBUFFER (base_buffer
, base
);
849 DEFUN ("buffer-local-value", Fbuffer_local_value
,
850 Sbuffer_local_value
, 2, 2, 0,
851 doc
: /* Return the value of VARIABLE in BUFFER.
852 If VARIABLE does not have a buffer-local binding in BUFFER, the value
853 is the default binding of variable. */)
855 register Lisp_Object symbol
;
856 register Lisp_Object buffer
;
858 register struct buffer
*buf
;
859 register Lisp_Object result
;
861 CHECK_SYMBOL (symbol
);
862 CHECK_BUFFER (buffer
);
863 buf
= XBUFFER (buffer
);
865 /* Look in local_var_list */
866 result
= Fassoc (symbol
, buf
->local_var_alist
);
872 /* Look in special slots */
873 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
874 offset
< sizeof (struct buffer
);
875 /* sizeof EMACS_INT == sizeof Lisp_Object */
876 offset
+= (sizeof (EMACS_INT
)))
878 idx
= PER_BUFFER_IDX (offset
);
879 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
880 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
881 && EQ (PER_BUFFER_SYMBOL (offset
), symbol
))
883 result
= PER_BUFFER_VALUE (buf
, offset
);
890 result
= Fdefault_value (symbol
);
894 Lisp_Object valcontents
;
895 Lisp_Object current_alist_element
;
897 /* What binding is loaded right now? */
898 valcontents
= SYMBOL_VALUE (symbol
);
899 current_alist_element
900 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
902 /* The value of the currently loaded binding is not
903 stored in it, but rather in the realvalue slot.
904 Store that value into the binding it belongs to
905 in case that is the one we are about to use. */
907 Fsetcdr (current_alist_element
,
908 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
910 /* Now get the (perhaps updated) value out of the binding. */
911 result
= XCDR (result
);
914 if (EQ (result
, Qunbound
))
915 return Fsignal (Qvoid_variable
, Fcons (symbol
, Qnil
));
920 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
921 Sbuffer_local_variables
, 0, 1, 0,
922 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
923 Most elements look like (SYMBOL . VALUE), describing one variable.
924 For a symbol that is locally unbound, just the symbol appears in the value.
925 Note that storing new VALUEs in these elements doesn't change the variables.
926 No argument or nil as argument means use current buffer as BUFFER. */)
928 register Lisp_Object buffer
;
930 register struct buffer
*buf
;
931 register Lisp_Object result
;
934 buf
= current_buffer
;
937 CHECK_BUFFER (buffer
);
938 buf
= XBUFFER (buffer
);
944 register Lisp_Object tail
;
945 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
947 Lisp_Object val
, elt
;
951 /* Reference each variable in the alist in buf.
952 If inquiring about the current buffer, this gets the current values,
953 so store them into the alist so the alist is up to date.
954 If inquiring about some other buffer, this swaps out any values
955 for that buffer, making the alist up to date automatically. */
956 val
= find_symbol_value (XCAR (elt
));
957 /* Use the current buffer value only if buf is the current buffer. */
958 if (buf
!= current_buffer
)
961 /* If symbol is unbound, put just the symbol in the list. */
962 if (EQ (val
, Qunbound
))
963 result
= Fcons (XCAR (elt
), result
);
964 /* Otherwise, put (symbol . value) in the list. */
966 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
970 /* Add on all the variables stored in special slots. */
974 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
975 offset
< sizeof (struct buffer
);
976 /* sizeof EMACS_INT == sizeof Lisp_Object */
977 offset
+= (sizeof (EMACS_INT
)))
979 idx
= PER_BUFFER_IDX (offset
);
980 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
981 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
982 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
983 PER_BUFFER_VALUE (buf
, offset
)),
992 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
994 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
995 No argument or nil as argument means use current buffer as BUFFER. */)
997 register Lisp_Object buffer
;
999 register struct buffer
*buf
;
1001 buf
= current_buffer
;
1004 CHECK_BUFFER (buffer
);
1005 buf
= XBUFFER (buffer
);
1008 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1011 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1013 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1014 A non-nil FLAG means mark the buffer modified. */)
1016 register Lisp_Object flag
;
1018 register int already
;
1019 register Lisp_Object fn
;
1020 Lisp_Object buffer
, window
;
1022 #ifdef CLASH_DETECTION
1023 /* If buffer becoming modified, lock the file.
1024 If buffer becoming unmodified, unlock the file. */
1026 fn
= current_buffer
->file_truename
;
1027 /* Test buffer-file-name so that binding it to nil is effective. */
1028 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1030 already
= SAVE_MODIFF
< MODIFF
;
1031 if (!already
&& !NILP (flag
))
1033 else if (already
&& NILP (flag
))
1036 #endif /* CLASH_DETECTION */
1038 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1040 /* Set update_mode_lines only if buffer is displayed in some window.
1041 Packages like jit-lock or lazy-lock preserve a buffer's modified
1042 state by recording/restoring the state around blocks of code.
1043 Setting update_mode_lines makes redisplay consider all windows
1044 (on all frames). Stealth fontification of buffers not displayed
1045 would incur additional redisplay costs if we'd set
1046 update_modes_lines unconditionally.
1048 Ideally, I think there should be another mechanism for fontifying
1049 buffers without "modifying" buffers, or redisplay should be
1050 smarter about updating the `*' in mode lines. --gerd */
1051 XSETBUFFER (buffer
, current_buffer
);
1052 window
= Fget_buffer_window (buffer
, Qt
);
1053 if (WINDOWP (window
))
1055 ++update_mode_lines
;
1056 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1062 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1063 Srestore_buffer_modified_p
, 1, 1, 0,
1064 doc
: /* Like `set-buffer-modified-p', with a differences concerning redisplay.
1065 It is not ensured that mode lines will be updated to show the modified
1066 state of the current buffer. Use with care. */)
1070 #ifdef CLASH_DETECTION
1073 /* If buffer becoming modified, lock the file.
1074 If buffer becoming unmodified, unlock the file. */
1076 fn
= current_buffer
->file_truename
;
1077 /* Test buffer-file-name so that binding it to nil is effective. */
1078 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1080 int already
= SAVE_MODIFF
< MODIFF
;
1081 if (!already
&& !NILP (flag
))
1083 else if (already
&& NILP (flag
))
1086 #endif /* CLASH_DETECTION */
1088 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1092 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1094 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1095 Each buffer has a tick counter which is incremented each time the text in
1096 that buffer is changed. It wraps around occasionally.
1097 No argument or nil as argument means use current buffer as BUFFER. */)
1099 register Lisp_Object buffer
;
1101 register struct buffer
*buf
;
1103 buf
= current_buffer
;
1106 CHECK_BUFFER (buffer
);
1107 buf
= XBUFFER (buffer
);
1110 return make_number (BUF_MODIFF (buf
));
1113 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1114 "sRename buffer (to new name): \nP",
1115 doc
: /* Change current buffer's name to NEWNAME (a string).
1116 If second arg UNIQUE is nil or omitted, it is an error if a
1117 buffer named NEWNAME already exists.
1118 If UNIQUE is non-nil, come up with a new name using
1119 `generate-new-buffer-name'.
1120 Interactively, you can set UNIQUE with a prefix argument.
1121 We return the name we actually gave the buffer.
1122 This does not change the name of the visited file (if any). */)
1124 register Lisp_Object newname
, unique
;
1126 register Lisp_Object tem
, buf
;
1128 CHECK_STRING (newname
);
1130 if (SCHARS (newname
) == 0)
1131 error ("Empty string is invalid as a buffer name");
1133 tem
= Fget_buffer (newname
);
1136 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1137 rename the buffer automatically so you can create another
1138 with the original name. It makes UNIQUE equivalent to
1139 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1140 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1141 return current_buffer
->name
;
1143 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1145 error ("Buffer name `%s' is in use", SDATA (newname
));
1148 current_buffer
->name
= newname
;
1150 /* Catch redisplay's attention. Unless we do this, the mode lines for
1151 any windows displaying current_buffer will stay unchanged. */
1152 update_mode_lines
++;
1154 XSETBUFFER (buf
, current_buffer
);
1155 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1156 if (NILP (current_buffer
->filename
)
1157 && !NILP (current_buffer
->auto_save_file_name
))
1158 call0 (intern ("rename-auto-save-file"));
1159 /* Refetch since that last call may have done GC. */
1160 return current_buffer
->name
;
1163 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1164 doc
: /* Return most recently selected buffer other than BUFFER.
1165 Buffers not visible in windows are preferred to visible buffers,
1166 unless optional second argument VISIBLE-OK is non-nil.
1167 If the optional third argument FRAME is non-nil, use that frame's
1168 buffer list instead of the selected frame's buffer list.
1169 If no other buffer exists, the buffer `*scratch*' is returned.
1170 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1171 (buffer
, visible_ok
, frame
)
1172 register Lisp_Object buffer
, visible_ok
, frame
;
1174 Lisp_Object
Fset_buffer_major_mode ();
1175 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1179 frame
= selected_frame
;
1181 tail
= Vbuffer_alist
;
1182 pred
= frame_buffer_predicate (frame
);
1184 /* Consider buffers that have been seen in the selected frame
1185 before other buffers. */
1187 tem
= frame_buffer_list (frame
);
1191 if (BUFFERP (XCAR (tem
)))
1192 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1195 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1197 for (; CONSP (tail
); tail
= XCDR (tail
))
1199 buf
= Fcdr (XCAR (tail
));
1200 if (EQ (buf
, buffer
))
1204 if (NILP (XBUFFER (buf
)->name
))
1206 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1208 /* If the selected frame has a buffer_predicate,
1209 disregard buffers that don't fit the predicate. */
1212 tem
= call1 (pred
, buf
);
1217 if (NILP (visible_ok
))
1218 tem
= Fget_buffer_window (buf
, Qvisible
);
1223 if (NILP (notsogood
))
1226 if (!NILP (notsogood
))
1228 buf
= Fget_buffer (build_string ("*scratch*"));
1231 buf
= Fget_buffer_create (build_string ("*scratch*"));
1232 Fset_buffer_major_mode (buf
);
1237 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
1239 doc
: /* Make BUFFER stop keeping undo information.
1240 No argument or nil as argument means do this for the current buffer. */)
1242 register Lisp_Object buffer
;
1244 Lisp_Object real_buffer
;
1247 XSETBUFFER (real_buffer
, current_buffer
);
1250 real_buffer
= Fget_buffer (buffer
);
1251 if (NILP (real_buffer
))
1255 XBUFFER (real_buffer
)->undo_list
= Qt
;
1260 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1262 doc
: /* Start keeping undo information for buffer BUFFER.
1263 No argument or nil as argument means do this for the current buffer. */)
1265 register Lisp_Object buffer
;
1267 Lisp_Object real_buffer
;
1270 XSETBUFFER (real_buffer
, current_buffer
);
1273 real_buffer
= Fget_buffer (buffer
);
1274 if (NILP (real_buffer
))
1278 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1279 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1285 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1286 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1287 The buffer being killed will be current while the hook is running.\n\
1290 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1291 doc
: /* Kill the buffer BUFFER.
1292 The argument may be a buffer or may be the name of a buffer.
1293 An argument of nil means kill the current buffer.
1295 Value is t if the buffer is actually killed, nil if user says no.
1297 The value of `kill-buffer-hook' (which may be local to that buffer),
1298 if not void, is a list of functions to be called, with no arguments,
1299 before the buffer is actually killed. The buffer to be killed is current
1300 when the hook functions are called.
1302 Any processes that have this buffer as the `process-buffer' are killed
1308 register struct buffer
*b
;
1309 register Lisp_Object tem
;
1310 register struct Lisp_Marker
*m
;
1311 struct gcpro gcpro1
;
1314 buf
= Fcurrent_buffer ();
1316 buf
= Fget_buffer (buffer
);
1322 /* Avoid trouble for buffer already dead. */
1326 /* Query if the buffer is still modified. */
1327 if (INTERACTIVE
&& !NILP (b
->filename
)
1328 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1331 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1332 b
->name
, make_number (0)));
1338 /* Run hooks with the buffer to be killed the current buffer. */
1340 int count
= SPECPDL_INDEX ();
1341 Lisp_Object arglist
[1];
1343 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1344 set_buffer_internal (b
);
1346 /* First run the query functions; if any query is answered no,
1347 don't kill the buffer. */
1348 arglist
[0] = Qkill_buffer_query_functions
;
1349 if (NILP (Frun_hook_with_args_until_failure (1, arglist
)))
1350 return unbind_to (count
, Qnil
);
1352 /* Then run the hooks. */
1353 Frun_hooks (1, &Qkill_buffer_hook
);
1354 unbind_to (count
, Qnil
);
1357 /* We have no more questions to ask. Verify that it is valid
1358 to kill the buffer. This must be done after the questions
1359 since anything can happen within do_yes_or_no_p. */
1361 /* Don't kill the minibuffer now current. */
1362 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1368 /* When we kill a base buffer, kill all its indirect buffers.
1369 We do it at this stage so nothing terrible happens if they
1370 ask questions or their hooks get errors. */
1371 if (! b
->base_buffer
)
1373 struct buffer
*other
;
1377 for (other
= all_buffers
; other
; other
= other
->next
)
1378 /* all_buffers contains dead buffers too;
1379 don't re-kill them. */
1380 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1383 XSETBUFFER (buf
, other
);
1390 /* Make this buffer not be current.
1391 In the process, notice if this is the sole visible buffer
1392 and give up if so. */
1393 if (b
== current_buffer
)
1395 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1397 if (b
== current_buffer
)
1401 /* Notice if the buffer to kill is the sole visible buffer
1402 when we're currently in the mini-buffer, and give up if so. */
1403 XSETBUFFER (tem
, current_buffer
);
1404 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1406 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1411 /* Now there is no question: we can kill the buffer. */
1413 #ifdef CLASH_DETECTION
1414 /* Unlock this buffer's file, if it is locked. */
1416 #endif /* CLASH_DETECTION */
1418 kill_buffer_processes (buf
);
1419 clear_charpos_cache (b
);
1421 tem
= Vinhibit_quit
;
1423 replace_buffer_in_all_windows (buf
);
1424 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1425 frames_discard_buffer (buf
);
1426 Vinhibit_quit
= tem
;
1428 /* Delete any auto-save file, if we saved it in this session.
1429 But not if the buffer is modified. */
1430 if (STRINGP (b
->auto_save_file_name
)
1431 && b
->auto_save_modified
!= 0
1432 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1433 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1434 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1437 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1439 internal_delete_file (b
->auto_save_file_name
);
1444 /* Unchain all markers that belong to this indirect buffer.
1445 Don't unchain the markers that belong to the base buffer
1446 or its other indirect buffers. */
1447 for (m
= BUF_MARKERS (b
); m
; )
1449 struct Lisp_Marker
*next
= m
->next
;
1457 /* Unchain all markers of this buffer and its indirect buffers.
1458 and leave them pointing nowhere. */
1459 for (m
= BUF_MARKERS (b
); m
; )
1461 struct Lisp_Marker
*next
= m
->next
;
1466 BUF_MARKERS (b
) = NULL
;
1467 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1469 /* Perhaps we should explicitly free the interval tree here... */
1472 /* Reset the local variables, so that this buffer's local values
1473 won't be protected from GC. They would be protected
1474 if they happened to remain encached in their symbols.
1475 This gets rid of them for certain. */
1476 swap_out_buffer_local_variables (b
);
1477 reset_buffer_local_variables (b
, 1);
1482 if (! b
->base_buffer
)
1483 free_buffer_text (b
);
1485 if (b
->newline_cache
)
1487 free_region_cache (b
->newline_cache
);
1488 b
->newline_cache
= 0;
1490 if (b
->width_run_cache
)
1492 free_region_cache (b
->width_run_cache
);
1493 b
->width_run_cache
= 0;
1495 b
->width_table
= Qnil
;
1497 b
->undo_list
= Qnil
;
1502 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1503 we do this each time BUF is selected visibly, the more recently
1504 selected buffers are always closer to the front of the list. This
1505 means that other_buffer is more likely to choose a relevant buffer. */
1511 register Lisp_Object link
, prev
;
1513 frame
= selected_frame
;
1516 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1518 if (EQ (XCDR (XCAR (link
)), buf
))
1523 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1524 we cannot use Fdelq itself here because it allows quitting. */
1527 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1529 XSETCDR (prev
, XCDR (XCDR (prev
)));
1531 XSETCDR (link
, Vbuffer_alist
);
1532 Vbuffer_alist
= link
;
1534 /* Now move this buffer to the front of frame_buffer_list also. */
1537 for (link
= frame_buffer_list (frame
); CONSP (link
);
1540 if (EQ (XCAR (link
), buf
))
1545 /* Effectively do delq. */
1550 set_frame_buffer_list (frame
,
1551 XCDR (frame_buffer_list (frame
)));
1553 XSETCDR (prev
, XCDR (XCDR (prev
)));
1555 XSETCDR (link
, frame_buffer_list (frame
));
1556 set_frame_buffer_list (frame
, link
);
1559 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1562 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1563 doc
: /* Set an appropriate major mode for BUFFER.
1564 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1565 according to `default-major-mode'.
1566 Use this function before selecting the buffer, since it may need to inspect
1567 the current buffer's major mode. */)
1572 Lisp_Object function
;
1574 if (STRINGP (XBUFFER (buffer
)->name
)
1575 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1576 function
= find_symbol_value (intern ("initial-major-mode"));
1579 function
= buffer_defaults
.major_mode
;
1581 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1582 function
= current_buffer
->major_mode
;
1585 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1588 count
= SPECPDL_INDEX ();
1590 /* To select a nonfundamental mode,
1591 select the buffer temporarily and then call the mode function. */
1593 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1595 Fset_buffer (buffer
);
1598 return unbind_to (count
, Qnil
);
1601 /* If switching buffers in WINDOW would be an error, return
1602 a C string saying what the error would be. */
1605 no_switch_window (window
)
1609 if (EQ (minibuf_window
, window
))
1610 return "Cannot switch buffers in minibuffer window";
1611 tem
= Fwindow_dedicated_p (window
);
1613 return "Cannot switch buffers in a dedicated window";
1617 /* Switch to buffer BUFFER in the selected window.
1618 If NORECORD is non-nil, don't call record_buffer. */
1621 switch_to_buffer_1 (buffer
, norecord
)
1622 Lisp_Object buffer
, norecord
;
1624 register Lisp_Object buf
;
1627 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1630 buf
= Fget_buffer (buffer
);
1633 buf
= Fget_buffer_create (buffer
);
1634 Fset_buffer_major_mode (buf
);
1638 if (NILP (norecord
))
1639 record_buffer (buf
);
1641 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1642 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1649 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1650 doc
: /* Select buffer BUFFER in the current window.
1651 BUFFER may be a buffer or a buffer name.
1652 Optional second arg NORECORD non-nil means
1653 do not put this buffer at the front of the list of recently selected ones.
1655 WARNING: This is NOT the way to work on another buffer temporarily
1656 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1657 the window-buffer correspondences. */)
1659 Lisp_Object buffer
, norecord
;
1663 if (EQ (buffer
, Fwindow_buffer (selected_window
)))
1664 /* Basically a NOP. Avoid signalling an error if the selected window
1665 is dedicated, or a minibuffer, ... */
1666 return Fset_buffer (buffer
);
1668 err
= no_switch_window (selected_window
);
1669 if (err
) error (err
);
1671 return switch_to_buffer_1 (buffer
, norecord
);
1674 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1675 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1676 If BUFFER is nil, then some other buffer is chosen.
1677 If `pop-up-windows' is non-nil, windows can be split to do this.
1678 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1679 window even if BUFFER is already visible in the selected window.
1680 This uses the function `display-buffer' as a subroutine; see the documentation
1681 of `display-buffer' for additional customization information.
1683 Optional third arg NORECORD non-nil means
1684 do not put this buffer at the front of the list of recently selected ones. */)
1685 (buffer
, other_window
, norecord
)
1686 Lisp_Object buffer
, other_window
, norecord
;
1688 register Lisp_Object buf
;
1690 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1693 buf
= Fget_buffer (buffer
);
1696 buf
= Fget_buffer_create (buffer
);
1697 Fset_buffer_major_mode (buf
);
1701 if (NILP (norecord
))
1702 /* Why bother ? Fselect_window will do it for us anyway. -stef */
1703 record_buffer (buf
);
1704 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
), norecord
);
1708 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1709 doc
: /* Return the current buffer as a Lisp object. */)
1712 register Lisp_Object buf
;
1713 XSETBUFFER (buf
, current_buffer
);
1717 /* Set the current buffer to B.
1719 We previously set windows_or_buffers_changed here to invalidate
1720 global unchanged information in beg_unchanged and end_unchanged.
1721 This is no longer necessary because we now compute unchanged
1722 information on a buffer-basis. Every action affecting other
1723 windows than the selected one requires a select_window at some
1724 time, and that increments windows_or_buffers_changed. */
1727 set_buffer_internal (b
)
1728 register struct buffer
*b
;
1730 if (current_buffer
!= b
)
1731 set_buffer_internal_1 (b
);
1734 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1735 This is used by redisplay. */
1738 set_buffer_internal_1 (b
)
1739 register struct buffer
*b
;
1741 register struct buffer
*old_buf
;
1742 register Lisp_Object tail
, valcontents
;
1745 #ifdef USE_MMAP_FOR_BUFFERS
1746 if (b
->text
->beg
== NULL
)
1747 enlarge_buffer_text (b
, 0);
1748 #endif /* USE_MMAP_FOR_BUFFERS */
1750 if (current_buffer
== b
)
1753 old_buf
= current_buffer
;
1755 last_known_column_point
= -1; /* invalidate indentation cache */
1759 /* Put the undo list back in the base buffer, so that it appears
1760 that an indirect buffer shares the undo list of its base. */
1761 if (old_buf
->base_buffer
)
1762 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1764 /* If the old current buffer has markers to record PT, BEGV and ZV
1765 when it is not current, update them now. */
1766 if (! NILP (old_buf
->pt_marker
))
1769 XSETBUFFER (obuf
, old_buf
);
1770 set_marker_both (old_buf
->pt_marker
, obuf
,
1771 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1773 if (! NILP (old_buf
->begv_marker
))
1776 XSETBUFFER (obuf
, old_buf
);
1777 set_marker_both (old_buf
->begv_marker
, obuf
,
1778 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1780 if (! NILP (old_buf
->zv_marker
))
1783 XSETBUFFER (obuf
, old_buf
);
1784 set_marker_both (old_buf
->zv_marker
, obuf
,
1785 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1789 /* Get the undo list from the base buffer, so that it appears
1790 that an indirect buffer shares the undo list of its base. */
1792 b
->undo_list
= b
->base_buffer
->undo_list
;
1794 /* If the new current buffer has markers to record PT, BEGV and ZV
1795 when it is not current, fetch them now. */
1796 if (! NILP (b
->pt_marker
))
1798 BUF_PT (b
) = marker_position (b
->pt_marker
);
1799 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1801 if (! NILP (b
->begv_marker
))
1803 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1804 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1806 if (! NILP (b
->zv_marker
))
1808 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1809 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1812 /* Look down buffer's list of local Lisp variables
1813 to find and update any that forward into C variables. */
1815 for (tail
= b
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1817 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1818 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1819 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1820 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1821 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1822 /* Just reference the variable
1823 to cause it to become set for this buffer. */
1824 Fsymbol_value (XCAR (XCAR (tail
)));
1827 /* Do the same with any others that were local to the previous buffer */
1830 for (tail
= old_buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1832 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1833 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1834 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1835 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1836 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1837 /* Just reference the variable
1838 to cause it to become set for this buffer. */
1839 Fsymbol_value (XCAR (XCAR (tail
)));
1843 /* Switch to buffer B temporarily for redisplay purposes.
1844 This avoids certain things that don't need to be done within redisplay. */
1850 register struct buffer
*old_buf
;
1852 if (current_buffer
== b
)
1855 old_buf
= current_buffer
;
1860 /* If the old current buffer has markers to record PT, BEGV and ZV
1861 when it is not current, update them now. */
1862 if (! NILP (old_buf
->pt_marker
))
1865 XSETBUFFER (obuf
, old_buf
);
1866 set_marker_both (old_buf
->pt_marker
, obuf
,
1867 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1869 if (! NILP (old_buf
->begv_marker
))
1872 XSETBUFFER (obuf
, old_buf
);
1873 set_marker_both (old_buf
->begv_marker
, obuf
,
1874 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1876 if (! NILP (old_buf
->zv_marker
))
1879 XSETBUFFER (obuf
, old_buf
);
1880 set_marker_both (old_buf
->zv_marker
, obuf
,
1881 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1885 /* If the new current buffer has markers to record PT, BEGV and ZV
1886 when it is not current, fetch them now. */
1887 if (! NILP (b
->pt_marker
))
1889 BUF_PT (b
) = marker_position (b
->pt_marker
);
1890 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1892 if (! NILP (b
->begv_marker
))
1894 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1895 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1897 if (! NILP (b
->zv_marker
))
1899 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1900 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1904 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1905 doc
: /* Make the buffer BUFFER current for editing operations.
1906 BUFFER may be a buffer or the name of an existing buffer.
1907 See also `save-excursion' when you want to make a buffer current temporarily.
1908 This function does not display the buffer, so its effect ends
1909 when the current command terminates.
1910 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1912 register Lisp_Object buffer
;
1914 register Lisp_Object buf
;
1915 buf
= Fget_buffer (buffer
);
1918 if (NILP (XBUFFER (buf
)->name
))
1919 error ("Selecting deleted buffer");
1920 set_buffer_internal (XBUFFER (buf
));
1924 /* Set the current buffer to BUFFER provided it is alive. */
1927 set_buffer_if_live (buffer
)
1930 if (! NILP (XBUFFER (buffer
)->name
))
1931 Fset_buffer (buffer
);
1935 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1936 Sbarf_if_buffer_read_only
, 0, 0, 0,
1937 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1940 if (!NILP (current_buffer
->read_only
)
1941 && NILP (Vinhibit_read_only
))
1942 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1946 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1947 doc
: /* Put BUFFER at the end of the list of all buffers.
1948 There it is the least likely candidate for `other-buffer' to return;
1949 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1950 If BUFFER is nil or omitted, bury the current buffer.
1951 Also, if BUFFER is nil or omitted, remove the current buffer from the
1952 selected window if it is displayed there. */)
1954 register Lisp_Object buffer
;
1956 /* Figure out what buffer we're going to bury. */
1960 XSETBUFFER (buffer
, current_buffer
);
1962 tem
= Fwindow_buffer (selected_window
);
1963 /* If we're burying the current buffer, unshow it. */
1964 if (EQ (buffer
, tem
))
1966 if (NILP (Fwindow_dedicated_p (selected_window
)))
1967 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1968 else if (NILP (XWINDOW (selected_window
)->parent
))
1969 Ficonify_frame (Fwindow_frame (selected_window
));
1971 Fdelete_window (selected_window
);
1978 buf1
= Fget_buffer (buffer
);
1984 /* Move buffer to the end of the buffer list. Do nothing if the
1985 buffer is killed. */
1986 if (!NILP (XBUFFER (buffer
)->name
))
1988 Lisp_Object aelt
, link
;
1990 aelt
= Frassq (buffer
, Vbuffer_alist
);
1991 link
= Fmemq (aelt
, Vbuffer_alist
);
1992 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1993 XSETCDR (link
, Qnil
);
1994 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1996 /* Removing BUFFER from frame-specific lists
1997 has the effect of putting BUFFER at the end
1998 of the combined list in each frame. */
1999 frames_discard_buffer (buffer
);
2005 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2006 doc
: /* Delete the entire contents of the current buffer.
2007 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2008 so the buffer is truly empty after this. */)
2015 current_buffer
->last_window_start
= 1;
2016 /* Prevent warnings, or suspension of auto saving, that would happen
2017 if future size is less than past size. Use of erase-buffer
2018 implies that the future text is not really related to the past text. */
2019 XSETFASTINT (current_buffer
->save_length
, 0);
2024 validate_region (b
, e
)
2025 register Lisp_Object
*b
, *e
;
2027 CHECK_NUMBER_COERCE_MARKER (*b
);
2028 CHECK_NUMBER_COERCE_MARKER (*e
);
2030 if (XINT (*b
) > XINT (*e
))
2033 tem
= *b
; *b
= *e
; *e
= tem
;
2036 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2037 && XINT (*e
) <= ZV
))
2038 args_out_of_range (*b
, *e
);
2041 /* Advance BYTE_POS up to a character boundary
2042 and return the adjusted position. */
2045 advance_to_char_boundary (byte_pos
)
2050 if (byte_pos
== BEG
)
2051 /* Beginning of buffer is always a character boundary. */
2054 c
= FETCH_BYTE (byte_pos
);
2055 if (! CHAR_HEAD_P (c
))
2057 /* We should advance BYTE_POS only when C is a constituent of a
2058 multibyte sequence. */
2059 int orig_byte_pos
= byte_pos
;
2064 c
= FETCH_BYTE (byte_pos
);
2066 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2068 if (byte_pos
< orig_byte_pos
)
2069 byte_pos
= orig_byte_pos
;
2070 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2071 surely advance to the correct character boundary. If C is
2072 not, BYTE_POS was unchanged. */
2078 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2080 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2081 If FLAG is t, this makes the buffer a multibyte buffer.
2082 If FLAG is nil, this makes the buffer a single-byte buffer.
2083 The buffer contents remain unchanged as a sequence of bytes
2084 but the contents viewed as characters do change. */)
2088 struct Lisp_Marker
*tail
, *markers
;
2089 struct buffer
*other
;
2090 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2092 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2093 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2095 if (current_buffer
->base_buffer
)
2096 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2098 /* Do nothing if nothing actually changes. */
2099 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2102 /* It would be better to update the list,
2103 but this is good enough for now. */
2105 current_buffer
->undo_list
= Qt
;
2107 /* If the cached position is for this buffer, clear it out. */
2108 clear_charpos_cache (current_buffer
);
2111 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2113 begv
= BEGV
, zv
= ZV
;
2123 /* Do this first, so it can use CHAR_TO_BYTE
2124 to calculate the old correspondences. */
2125 set_intervals_multibyte (0);
2127 current_buffer
->enable_multibyte_characters
= Qnil
;
2133 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2136 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2137 tail
->charpos
= tail
->bytepos
;
2139 /* Convert multibyte form of 8-bit characters to unibyte. */
2154 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2155 p
+= bytes
, pos
+= bytes
;
2158 c
= STRING_CHAR (p
, stop
- pos
);
2159 /* Delete all bytes for this 8-bit character but the
2160 last one, and change the last one to the charcter
2163 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2175 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2183 /* Be sure not to have a multibyte sequence striding over the GAP.
2184 Ex: We change this: "...abc\201 _GAP_ \241def..."
2185 to: "...abc _GAP_ \201\241def..." */
2187 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2188 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2190 unsigned char *p
= GPT_ADDR
- 1;
2192 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2193 if (BASE_LEADING_CODE_P (*p
))
2195 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2197 move_gap_both (new_gpt
, new_gpt
);
2201 /* Make the buffer contents valid as multibyte by converting
2202 8-bit characters to multibyte form. */
2218 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2219 p
+= bytes
, pos
+= bytes
;
2222 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2224 bytes
= CHAR_STRING (*p
, tmp
);
2226 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2228 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2229 /* Now the gap is after the just inserted data. */
2246 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2248 /* Do this first, so that chars_in_text asks the right question.
2249 set_intervals_multibyte needs it too. */
2250 current_buffer
->enable_multibyte_characters
= Qt
;
2252 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2253 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2255 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2257 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2258 if (BEGV_BYTE
> GPT_BYTE
)
2259 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2261 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2263 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2264 if (ZV_BYTE
> GPT_BYTE
)
2265 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2267 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2270 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2273 if (pt_byte
> GPT_BYTE
)
2274 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2276 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2277 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2280 tail
= markers
= BUF_MARKERS (current_buffer
);
2282 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2283 getting confused by the markers that have not yet been updated.
2284 It is also a signal that it should never create a marker. */
2285 BUF_MARKERS (current_buffer
) = NULL
;
2287 for (; tail
; tail
= tail
->next
)
2289 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2290 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2293 /* Make sure no markers were put on the chain
2294 while the chain value was incorrect. */
2295 if (BUF_MARKERS (current_buffer
))
2298 BUF_MARKERS (current_buffer
) = markers
;
2300 /* Do this last, so it can calculate the new correspondences
2301 between chars and bytes. */
2302 set_intervals_multibyte (1);
2306 current_buffer
->undo_list
= Qnil
;
2308 /* Changing the multibyteness of a buffer means that all windows
2309 showing that buffer must be updated thoroughly. */
2310 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2311 ++windows_or_buffers_changed
;
2313 /* Copy this buffer's new multibyte status
2314 into all of its indirect buffers. */
2315 for (other
= all_buffers
; other
; other
= other
->next
)
2316 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2318 other
->enable_multibyte_characters
2319 = current_buffer
->enable_multibyte_characters
;
2320 other
->prevent_redisplay_optimizations_p
= 1;
2323 /* Restore the modifiedness of the buffer. */
2324 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2325 Fset_buffer_modified_p (Qnil
);
2328 /* Update coding systems of this buffer's process (if any). */
2330 Lisp_Object process
;
2332 process
= Fget_buffer_process (Fcurrent_buffer ());
2333 if (PROCESSP (process
))
2334 setup_process_coding_systems (process
);
2336 #endif /* subprocesses */
2341 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2343 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2344 Most local variable bindings are eliminated so that the default values
2345 become effective once more. Also, the syntax table is set from
2346 `standard-syntax-table', the local keymap is set to nil,
2347 and the abbrev table from `fundamental-mode-abbrev-table'.
2348 This function also forces redisplay of the mode line.
2350 Every function to select a new major mode starts by
2351 calling this function.
2353 As a special exception, local variables whose names have
2354 a non-nil `permanent-local' property are not eliminated by this function.
2356 The first thing this function does is run
2357 the normal hook `change-major-mode-hook'. */)
2360 register Lisp_Object alist
, sym
, tem
;
2363 if (!NILP (Vrun_hooks
))
2364 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2365 oalist
= current_buffer
->local_var_alist
;
2367 /* Make sure none of the bindings in oalist
2368 remain swapped in, in their symbols. */
2370 swap_out_buffer_local_variables (current_buffer
);
2372 /* Actually eliminate all local bindings of this buffer. */
2374 reset_buffer_local_variables (current_buffer
, 0);
2376 /* Any which are supposed to be permanent,
2377 make local again, with the same values they had. */
2379 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2381 sym
= XCAR (XCAR (alist
));
2382 tem
= Fget (sym
, Qpermanent_local
);
2385 Fmake_local_variable (sym
);
2386 Fset (sym
, XCDR (XCAR (alist
)));
2390 /* Force mode-line redisplay. Useful here because all major mode
2391 commands call this function. */
2392 update_mode_lines
++;
2397 /* Make sure no local variables remain set up with buffer B
2398 for their current values. */
2401 swap_out_buffer_local_variables (b
)
2404 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2406 XSETBUFFER (buffer
, b
);
2407 oalist
= b
->local_var_alist
;
2409 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2411 sym
= XCAR (XCAR (alist
));
2413 /* Need not do anything if some other buffer's binding is now encached. */
2414 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2415 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2417 /* Symbol is set up for this buffer's old local value.
2418 Set it up for the current buffer with the default value. */
2420 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2421 /* Store the symbol's current value into the alist entry
2422 it is currently set up for. This is so that, if the
2423 local is marked permanent, and we make it local again
2424 later in Fkill_all_local_variables, we don't lose the value. */
2425 XSETCDR (XCAR (tem
),
2426 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2427 /* Switch to the symbol's default-value alist entry. */
2429 /* Mark it as current for buffer B. */
2430 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2431 /* Store the current value into any forwarding in the symbol. */
2432 store_symval_forwarding (sym
,
2433 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2439 /* Find all the overlays in the current buffer that contain position POS.
2440 Return the number found, and store them in a vector in *VEC_PTR.
2441 Store in *LEN_PTR the size allocated for the vector.
2442 Store in *NEXT_PTR the next position after POS where an overlay starts,
2443 or ZV if there are no more overlays.
2444 Store in *PREV_PTR the previous position before POS where an overlay ends,
2445 or where an overlay starts which ends at or after POS;
2446 or BEGV if there are no such overlays.
2447 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2449 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2450 when this function is called.
2452 If EXTEND is non-zero, we make the vector bigger if necessary.
2453 If EXTEND is zero, we never extend the vector,
2454 and we store only as many overlays as will fit.
2455 But we still return the total number of overlays.
2457 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2458 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2459 default (BEGV or ZV). */
2462 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2465 Lisp_Object
**vec_ptr
;
2471 Lisp_Object overlay
, start
, end
;
2472 struct Lisp_Overlay
*tail
;
2475 Lisp_Object
*vec
= *vec_ptr
;
2478 int inhibit_storing
= 0;
2480 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2482 int startpos
, endpos
;
2484 XSETMISC (overlay
, tail
);
2486 start
= OVERLAY_START (overlay
);
2487 end
= OVERLAY_END (overlay
);
2488 endpos
= OVERLAY_POSITION (end
);
2495 startpos
= OVERLAY_POSITION (start
);
2496 /* This one ends at or after POS
2497 so its start counts for PREV_PTR if it's before POS. */
2498 if (prev
< startpos
&& startpos
< pos
)
2502 if (startpos
<= pos
)
2506 /* The supplied vector is full.
2507 Either make it bigger, or don't store any more in it. */
2510 /* Make it work with an initial len == 0. */
2515 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2519 inhibit_storing
= 1;
2522 if (!inhibit_storing
)
2524 /* Keep counting overlays even if we can't return them all. */
2527 else if (startpos
< next
)
2531 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2533 int startpos
, endpos
;
2535 XSETMISC (overlay
, tail
);
2537 start
= OVERLAY_START (overlay
);
2538 end
= OVERLAY_END (overlay
);
2539 startpos
= OVERLAY_POSITION (start
);
2542 if (startpos
< next
)
2546 endpos
= OVERLAY_POSITION (end
);
2553 /* Make it work with an initial len == 0. */
2558 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2562 inhibit_storing
= 1;
2565 if (!inhibit_storing
)
2569 if (startpos
< pos
&& startpos
> prev
)
2572 else if (endpos
< pos
&& endpos
> prev
)
2574 else if (endpos
== pos
&& startpos
> prev
2575 && (!change_req
|| startpos
< pos
))
2586 /* Find all the overlays in the current buffer that overlap the range BEG-END
2587 or are empty at BEG.
2589 Return the number found, and store them in a vector in *VEC_PTR.
2590 Store in *LEN_PTR the size allocated for the vector.
2591 Store in *NEXT_PTR the next position after POS where an overlay starts,
2592 or ZV if there are no more overlays.
2593 Store in *PREV_PTR the previous position before POS where an overlay ends,
2594 or BEGV if there are no previous overlays.
2595 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2597 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2598 when this function is called.
2600 If EXTEND is non-zero, we make the vector bigger if necessary.
2601 If EXTEND is zero, we never extend the vector,
2602 and we store only as many overlays as will fit.
2603 But we still return the total number of overlays. */
2606 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2609 Lisp_Object
**vec_ptr
;
2614 Lisp_Object overlay
, ostart
, oend
;
2615 struct Lisp_Overlay
*tail
;
2618 Lisp_Object
*vec
= *vec_ptr
;
2621 int inhibit_storing
= 0;
2623 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2625 int startpos
, endpos
;
2627 XSETMISC (overlay
, tail
);
2629 ostart
= OVERLAY_START (overlay
);
2630 oend
= OVERLAY_END (overlay
);
2631 endpos
= OVERLAY_POSITION (oend
);
2638 startpos
= OVERLAY_POSITION (ostart
);
2639 /* Count an interval if it either overlaps the range
2640 or is empty at the start of the range. */
2641 if ((beg
< endpos
&& startpos
< end
)
2642 || (startpos
== endpos
&& beg
== endpos
))
2646 /* The supplied vector is full.
2647 Either make it bigger, or don't store any more in it. */
2650 /* Make it work with an initial len == 0. */
2655 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2659 inhibit_storing
= 1;
2662 if (!inhibit_storing
)
2664 /* Keep counting overlays even if we can't return them all. */
2667 else if (startpos
< next
)
2671 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2673 int startpos
, endpos
;
2675 XSETMISC (overlay
, tail
);
2677 ostart
= OVERLAY_START (overlay
);
2678 oend
= OVERLAY_END (overlay
);
2679 startpos
= OVERLAY_POSITION (ostart
);
2682 if (startpos
< next
)
2686 endpos
= OVERLAY_POSITION (oend
);
2687 /* Count an interval if it either overlaps the range
2688 or is empty at the start of the range. */
2689 if ((beg
< endpos
&& startpos
< end
)
2690 || (startpos
== endpos
&& beg
== endpos
))
2696 /* Make it work with an initial len == 0. */
2701 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2705 inhibit_storing
= 1;
2708 if (!inhibit_storing
)
2712 else if (endpos
< beg
&& endpos
> prev
)
2724 /* Return non-zero if there exists an overlay with a non-nil
2725 `mouse-face' property overlapping OVERLAY. */
2728 mouse_face_overlay_overlaps (overlay
)
2729 Lisp_Object overlay
;
2731 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2732 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2734 Lisp_Object
*v
, tem
;
2737 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2738 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2741 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2742 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2745 for (i
= 0; i
< n
; ++i
)
2746 if (!EQ (v
[i
], overlay
)
2747 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2756 /* Fast function to just test if we're at an overlay boundary. */
2758 overlay_touches_p (pos
)
2761 Lisp_Object overlay
;
2762 struct Lisp_Overlay
*tail
;
2764 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2768 XSETMISC (overlay
,tail
);
2769 if (!GC_OVERLAYP (overlay
))
2772 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2775 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2779 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2783 XSETMISC (overlay
, tail
);
2784 if (!GC_OVERLAYP (overlay
))
2787 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2790 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2798 Lisp_Object overlay
;
2804 compare_overlays (v1
, v2
)
2805 const void *v1
, *v2
;
2807 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2808 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2809 if (s1
->priority
!= s2
->priority
)
2810 return s1
->priority
- s2
->priority
;
2811 if (s1
->beg
!= s2
->beg
)
2812 return s1
->beg
- s2
->beg
;
2813 if (s1
->end
!= s2
->end
)
2814 return s2
->end
- s1
->end
;
2818 /* Sort an array of overlays by priority. The array is modified in place.
2819 The return value is the new size; this may be smaller than the original
2820 size if some of the overlays were invalid or were window-specific. */
2822 sort_overlays (overlay_vec
, noverlays
, w
)
2823 Lisp_Object
*overlay_vec
;
2828 struct sortvec
*sortvec
;
2829 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2831 /* Put the valid and relevant overlays into sortvec. */
2833 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2836 Lisp_Object overlay
;
2838 overlay
= overlay_vec
[i
];
2839 if (OVERLAY_VALID (overlay
)
2840 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2841 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2843 /* If we're interested in a specific window, then ignore
2844 overlays that are limited to some other window. */
2849 window
= Foverlay_get (overlay
, Qwindow
);
2850 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2854 /* This overlay is good and counts: put it into sortvec. */
2855 sortvec
[j
].overlay
= overlay
;
2856 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2857 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2858 tem
= Foverlay_get (overlay
, Qpriority
);
2860 sortvec
[j
].priority
= XINT (tem
);
2862 sortvec
[j
].priority
= 0;
2868 /* Sort the overlays into the proper order: increasing priority. */
2871 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2873 for (i
= 0; i
< noverlays
; i
++)
2874 overlay_vec
[i
] = sortvec
[i
].overlay
;
2880 Lisp_Object string
, string2
;
2887 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2888 int size
; /* Allocated length of that array. */
2889 int used
; /* How much of the array is currently in use. */
2890 int bytes
; /* Total length of the strings in buf. */
2893 /* Buffers for storing information about the overlays touching a given
2894 position. These could be automatic variables in overlay_strings, but
2895 it's more efficient to hold onto the memory instead of repeatedly
2896 allocating and freeing it. */
2897 static struct sortstrlist overlay_heads
, overlay_tails
;
2898 static unsigned char *overlay_str_buf
;
2900 /* Allocated length of overlay_str_buf. */
2901 static int overlay_str_len
;
2903 /* A comparison function suitable for passing to qsort. */
2905 cmp_for_strings (as1
, as2
)
2908 struct sortstr
*s1
= (struct sortstr
*)as1
;
2909 struct sortstr
*s2
= (struct sortstr
*)as2
;
2910 if (s1
->size
!= s2
->size
)
2911 return s2
->size
- s1
->size
;
2912 if (s1
->priority
!= s2
->priority
)
2913 return s1
->priority
- s2
->priority
;
2918 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2919 struct sortstrlist
*ssl
;
2920 Lisp_Object str
, str2
, pri
;
2925 if (ssl
->used
== ssl
->size
)
2931 ssl
->buf
= ((struct sortstr
*)
2932 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2934 ssl
->buf
[ssl
->used
].string
= str
;
2935 ssl
->buf
[ssl
->used
].string2
= str2
;
2936 ssl
->buf
[ssl
->used
].size
= size
;
2937 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2940 if (NILP (current_buffer
->enable_multibyte_characters
))
2941 nbytes
= SCHARS (str
);
2942 else if (! STRING_MULTIBYTE (str
))
2943 nbytes
= count_size_as_multibyte (SDATA (str
),
2946 nbytes
= SBYTES (str
);
2948 ssl
->bytes
+= nbytes
;
2952 if (NILP (current_buffer
->enable_multibyte_characters
))
2953 nbytes
= SCHARS (str2
);
2954 else if (! STRING_MULTIBYTE (str2
))
2955 nbytes
= count_size_as_multibyte (SDATA (str2
),
2958 nbytes
= SBYTES (str2
);
2960 ssl
->bytes
+= nbytes
;
2964 /* Return the concatenation of the strings associated with overlays that
2965 begin or end at POS, ignoring overlays that are specific to a window
2966 other than W. The strings are concatenated in the appropriate order:
2967 shorter overlays nest inside longer ones, and higher priority inside
2968 lower. Normally all of the after-strings come first, but zero-sized
2969 overlays have their after-strings ride along with the before-strings
2970 because it would look strange to print them inside-out.
2972 Returns the string length, and stores the contents indirectly through
2973 PSTR, if that variable is non-null. The string may be overwritten by
2974 subsequent calls. */
2977 overlay_strings (pos
, w
, pstr
)
2980 unsigned char **pstr
;
2982 Lisp_Object overlay
, window
, str
;
2983 struct Lisp_Overlay
*ov
;
2984 int startpos
, endpos
;
2985 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2987 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2988 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2989 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
2991 XSETMISC (overlay
, ov
);
2992 eassert (OVERLAYP (overlay
));
2994 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2995 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2998 if (endpos
!= pos
&& startpos
!= pos
)
3000 window
= Foverlay_get (overlay
, Qwindow
);
3001 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3004 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3005 record_overlay_string (&overlay_heads
, str
,
3007 ? Foverlay_get (overlay
, Qafter_string
)
3009 Foverlay_get (overlay
, Qpriority
),
3011 else if (endpos
== pos
3012 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3013 record_overlay_string (&overlay_tails
, str
, Qnil
,
3014 Foverlay_get (overlay
, Qpriority
),
3017 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3019 XSETMISC (overlay
, ov
);
3020 eassert (OVERLAYP (overlay
));
3022 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3023 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3026 if (endpos
!= pos
&& startpos
!= pos
)
3028 window
= Foverlay_get (overlay
, Qwindow
);
3029 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3032 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3033 record_overlay_string (&overlay_heads
, str
,
3035 ? Foverlay_get (overlay
, Qafter_string
)
3037 Foverlay_get (overlay
, Qpriority
),
3039 else if (endpos
== pos
3040 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3041 record_overlay_string (&overlay_tails
, str
, Qnil
,
3042 Foverlay_get (overlay
, Qpriority
),
3045 if (overlay_tails
.used
> 1)
3046 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3048 if (overlay_heads
.used
> 1)
3049 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3051 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3056 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3058 if (total
> overlay_str_len
)
3060 overlay_str_len
= total
;
3061 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3064 p
= overlay_str_buf
;
3065 for (i
= overlay_tails
.used
; --i
>= 0;)
3068 tem
= overlay_tails
.buf
[i
].string
;
3069 nbytes
= copy_text (SDATA (tem
), p
,
3071 STRING_MULTIBYTE (tem
), multibyte
);
3074 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3077 tem
= overlay_heads
.buf
[i
].string
;
3078 nbytes
= copy_text (SDATA (tem
), p
,
3080 STRING_MULTIBYTE (tem
), multibyte
);
3082 tem
= overlay_heads
.buf
[i
].string2
;
3085 nbytes
= copy_text (SDATA (tem
), p
,
3087 STRING_MULTIBYTE (tem
), multibyte
);
3091 if (p
!= overlay_str_buf
+ total
)
3094 *pstr
= overlay_str_buf
;
3100 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3103 recenter_overlay_lists (buf
, pos
)
3107 Lisp_Object overlay
, beg
, end
;
3108 struct Lisp_Overlay
*prev
, *tail
, *next
;
3110 /* See if anything in overlays_before should move to overlays_after. */
3112 /* We don't strictly need prev in this loop; it should always be nil.
3113 But we use it for symmetry and in case that should cease to be true
3114 with some future change. */
3116 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3119 XSETMISC (overlay
, tail
);
3121 /* If the overlay is not valid, get rid of it. */
3122 if (!OVERLAY_VALID (overlay
))
3127 /* Splice the cons cell TAIL out of overlays_before. */
3131 buf
->overlays_before
= next
;
3137 beg
= OVERLAY_START (overlay
);
3138 end
= OVERLAY_END (overlay
);
3140 if (OVERLAY_POSITION (end
) > pos
)
3142 /* OVERLAY needs to be moved. */
3143 int where
= OVERLAY_POSITION (beg
);
3144 struct Lisp_Overlay
*other
, *other_prev
;
3146 /* Splice the cons cell TAIL out of overlays_before. */
3150 buf
->overlays_before
= next
;
3152 /* Search thru overlays_after for where to put it. */
3154 for (other
= buf
->overlays_after
; other
;
3155 other_prev
= other
, other
= other
->next
)
3157 Lisp_Object otherbeg
, otheroverlay
;
3159 XSETMISC (otheroverlay
, other
);
3160 eassert (OVERLAY_VALID (otheroverlay
));
3162 otherbeg
= OVERLAY_START (otheroverlay
);
3163 if (OVERLAY_POSITION (otherbeg
) >= where
)
3167 /* Add TAIL to overlays_after before OTHER. */
3170 other_prev
->next
= tail
;
3172 buf
->overlays_after
= tail
;
3176 /* We've reached the things that should stay in overlays_before.
3177 All the rest of overlays_before must end even earlier,
3182 /* See if anything in overlays_after should be in overlays_before. */
3184 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3187 XSETMISC (overlay
, tail
);
3189 /* If the overlay is not valid, get rid of it. */
3190 if (!OVERLAY_VALID (overlay
))
3195 /* Splice the cons cell TAIL out of overlays_after. */
3199 buf
->overlays_after
= next
;
3205 beg
= OVERLAY_START (overlay
);
3206 end
= OVERLAY_END (overlay
);
3208 /* Stop looking, when we know that nothing further
3209 can possibly end before POS. */
3210 if (OVERLAY_POSITION (beg
) > pos
)
3213 if (OVERLAY_POSITION (end
) <= pos
)
3215 /* OVERLAY needs to be moved. */
3216 int where
= OVERLAY_POSITION (end
);
3217 struct Lisp_Overlay
*other
, *other_prev
;
3219 /* Splice the cons cell TAIL out of overlays_after. */
3223 buf
->overlays_after
= next
;
3225 /* Search thru overlays_before for where to put it. */
3227 for (other
= buf
->overlays_before
; other
;
3228 other_prev
= other
, other
= other
->next
)
3230 Lisp_Object otherend
, otheroverlay
;
3232 XSETMISC (otheroverlay
, other
);
3233 eassert (OVERLAY_VALID (otheroverlay
));
3235 otherend
= OVERLAY_END (otheroverlay
);
3236 if (OVERLAY_POSITION (otherend
) <= where
)
3240 /* Add TAIL to overlays_before before OTHER. */
3243 other_prev
->next
= tail
;
3245 buf
->overlays_before
= tail
;
3250 buf
->overlay_center
= pos
;
3254 adjust_overlays_for_insert (pos
, length
)
3258 /* After an insertion, the lists are still sorted properly,
3259 but we may need to update the value of the overlay center. */
3260 if (current_buffer
->overlay_center
>= pos
)
3261 current_buffer
->overlay_center
+= length
;
3265 adjust_overlays_for_delete (pos
, length
)
3269 if (current_buffer
->overlay_center
< pos
)
3270 /* The deletion was to our right. No change needed; the before- and
3271 after-lists are still consistent. */
3273 else if (current_buffer
->overlay_center
> pos
+ length
)
3274 /* The deletion was to our left. We need to adjust the center value
3275 to account for the change in position, but the lists are consistent
3276 given the new value. */
3277 current_buffer
->overlay_center
-= length
;
3279 /* We're right in the middle. There might be things on the after-list
3280 that now belong on the before-list. Recentering will move them,
3281 and also update the center point. */
3282 recenter_overlay_lists (current_buffer
, pos
);
3285 /* Fix up overlays that were garbled as a result of permuting markers
3286 in the range START through END. Any overlay with at least one
3287 endpoint in this range will need to be unlinked from the overlay
3288 list and reinserted in its proper place.
3289 Such an overlay might even have negative size at this point.
3290 If so, we'll reverse the endpoints. Can you think of anything
3291 better to do in this situation? */
3293 fix_overlays_in_range (start
, end
)
3294 register int start
, end
;
3296 Lisp_Object overlay
;
3297 struct Lisp_Overlay
*before_list
, *after_list
;
3298 /* These are either nil, indicating that before_list or after_list
3299 should be assigned, or the cons cell the cdr of which should be
3301 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3302 /* 'Parent', likewise, indicates a cons cell or
3303 current_buffer->overlays_before or overlays_after, depending
3304 which loop we're in. */
3305 struct Lisp_Overlay
*tail
, *parent
;
3306 int startpos
, endpos
;
3308 /* This algorithm shifts links around instead of consing and GCing.
3309 The loop invariant is that before_list (resp. after_list) is a
3310 well-formed list except that its last element, the CDR of beforep
3311 (resp. afterp) if beforep (afterp) isn't nil or before_list
3312 (after_list) if it is, is still uninitialized. So it's not a bug
3313 that before_list isn't initialized, although it may look
3315 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3317 XSETMISC (overlay
, tail
);
3318 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3321 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3323 || (startpos
>= start
&& startpos
< end
))
3325 /* If the overlay is backwards, fix that now. */
3326 if (startpos
> endpos
)
3329 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3331 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3333 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3335 /* Add it to the end of the wrong list. Later on,
3336 recenter_overlay_lists will move it to the right place. */
3337 if (endpos
< current_buffer
->overlay_center
)
3342 afterp
->next
= tail
;
3350 beforep
->next
= tail
;
3354 current_buffer
->overlays_before
= tail
->next
;
3356 parent
->next
= tail
->next
;
3360 parent
= tail
, tail
= parent
->next
;
3362 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3364 XSETMISC (overlay
, tail
);
3365 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3366 if (startpos
>= end
)
3368 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3369 if (startpos
>= start
3370 || (endpos
>= start
&& endpos
< end
))
3372 if (startpos
> endpos
)
3375 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3377 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3379 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3381 if (endpos
< current_buffer
->overlay_center
)
3386 afterp
->next
= tail
;
3394 beforep
->next
= tail
;
3398 current_buffer
->overlays_after
= tail
->next
;
3400 parent
->next
= tail
->next
;
3404 parent
= tail
, tail
= parent
->next
;
3407 /* Splice the constructed (wrong) lists into the buffer's lists,
3408 and let the recenter function make it sane again. */
3411 beforep
->next
= current_buffer
->overlays_before
;
3412 current_buffer
->overlays_before
= before_list
;
3414 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3418 afterp
->next
= current_buffer
->overlays_after
;
3419 current_buffer
->overlays_after
= after_list
;
3421 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3424 /* We have two types of overlay: the one whose ending marker is
3425 after-insertion-marker (this is the usual case) and the one whose
3426 ending marker is before-insertion-marker. When `overlays_before'
3427 contains overlays of the latter type and the former type in this
3428 order and both overlays end at inserting position, inserting a text
3429 increases only the ending marker of the latter type, which results
3430 in incorrect ordering of `overlays_before'.
3432 This function fixes ordering of overlays in the slot
3433 `overlays_before' of the buffer *BP. Before the insertion, `point'
3434 was at PREV, and now is at POS. */
3437 fix_overlays_before (bp
, prev
, pos
)
3439 EMACS_INT prev
, pos
;
3441 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3442 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3446 /* After the insertion, the several overlays may be in incorrect
3447 order. The possibility is that, in the list `overlays_before',
3448 an overlay which ends at POS appears after an overlay which ends
3449 at PREV. Since POS is greater than PREV, we must fix the
3450 ordering of these overlays, by moving overlays ends at POS before
3451 the overlays ends at PREV. */
3453 /* At first, find a place where disordered overlays should be linked
3454 in. It is where an overlay which end before POS exists. (i.e. an
3455 overlay whose ending marker is after-insertion-marker if disorder
3458 && (XSETMISC (tem
, tail
),
3459 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3465 /* If we don't find such an overlay,
3466 or the found one ends before PREV,
3467 or the found one is the last one in the list,
3468 we don't have to fix anything. */
3469 if (!tail
|| end
< prev
|| !tail
->next
)
3472 right_pair
= parent
;
3476 /* Now, end position of overlays in the list TAIL should be before
3477 or equal to PREV. In the loop, an overlay which ends at POS is
3478 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3479 we found an overlay which ends before PREV, the remaining
3480 overlays are in correct order. */
3483 XSETMISC (tem
, tail
);
3484 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3487 { /* This overlay is disordered. */
3488 struct Lisp_Overlay
*found
= tail
;
3490 /* Unlink the found overlay. */
3492 parent
->next
= tail
;
3493 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3494 and link it into the right place. */
3497 found
->next
= bp
->overlays_before
;
3498 bp
->overlays_before
= found
;
3502 found
->next
= right_pair
->next
;
3503 right_pair
->next
= found
;
3506 else if (end
== prev
)
3511 else /* No more disordered overlay. */
3516 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3517 doc
: /* Return t if OBJECT is an overlay. */)
3521 return (OVERLAYP (object
) ? Qt
: Qnil
);
3524 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3525 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3526 If omitted, BUFFER defaults to the current buffer.
3527 BEG and END may be integers or markers.
3528 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3529 front delimiter advance when text is inserted there.
3530 The fifth arg REAR-ADVANCE, if non-nil, makes the
3531 rear delimiter advance when text is inserted there. */)
3532 (beg
, end
, buffer
, front_advance
, rear_advance
)
3533 Lisp_Object beg
, end
, buffer
;
3534 Lisp_Object front_advance
, rear_advance
;
3536 Lisp_Object overlay
;
3540 XSETBUFFER (buffer
, current_buffer
);
3542 CHECK_BUFFER (buffer
);
3544 && ! EQ (Fmarker_buffer (beg
), buffer
))
3545 error ("Marker points into wrong buffer");
3547 && ! EQ (Fmarker_buffer (end
), buffer
))
3548 error ("Marker points into wrong buffer");
3550 CHECK_NUMBER_COERCE_MARKER (beg
);
3551 CHECK_NUMBER_COERCE_MARKER (end
);
3553 if (XINT (beg
) > XINT (end
))
3556 temp
= beg
; beg
= end
; end
= temp
;
3559 b
= XBUFFER (buffer
);
3561 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3562 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3564 if (!NILP (front_advance
))
3565 XMARKER (beg
)->insertion_type
= 1;
3566 if (!NILP (rear_advance
))
3567 XMARKER (end
)->insertion_type
= 1;
3569 overlay
= allocate_misc ();
3570 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3571 XOVERLAY (overlay
)->start
= beg
;
3572 XOVERLAY (overlay
)->end
= end
;
3573 XOVERLAY (overlay
)->plist
= Qnil
;
3574 XOVERLAY (overlay
)->next
= NULL
;
3576 /* Put the new overlay on the wrong list. */
3577 end
= OVERLAY_END (overlay
);
3578 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3580 if (b
->overlays_after
)
3581 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3582 b
->overlays_after
= XOVERLAY (overlay
);
3586 if (b
->overlays_before
)
3587 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3588 b
->overlays_before
= XOVERLAY (overlay
);
3591 /* This puts it in the right list, and in the right order. */
3592 recenter_overlay_lists (b
, b
->overlay_center
);
3594 /* We don't need to redisplay the region covered by the overlay, because
3595 the overlay has no properties at the moment. */
3600 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3603 modify_overlay (buf
, start
, end
)
3605 EMACS_INT start
, end
;
3614 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3616 /* If this is a buffer not in the selected window,
3617 we must do other windows. */
3618 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3619 windows_or_buffers_changed
= 1;
3620 /* If multiple windows show this buffer, we must do other windows. */
3621 else if (buffer_shared
> 1)
3622 windows_or_buffers_changed
= 1;
3624 ++BUF_OVERLAY_MODIFF (buf
);
3628 Lisp_Object
Fdelete_overlay ();
3630 static struct Lisp_Overlay
*
3631 unchain_overlay (list
, overlay
)
3632 struct Lisp_Overlay
*list
, *overlay
;
3634 struct Lisp_Overlay
*tmp
, *prev
;
3635 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3639 prev
->next
= tmp
->next
;
3642 overlay
->next
= NULL
;
3648 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3649 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3650 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3651 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3653 (overlay
, beg
, end
, buffer
)
3654 Lisp_Object overlay
, beg
, end
, buffer
;
3656 struct buffer
*b
, *ob
;
3657 Lisp_Object obuffer
;
3658 int count
= SPECPDL_INDEX ();
3660 CHECK_OVERLAY (overlay
);
3662 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3664 XSETBUFFER (buffer
, current_buffer
);
3665 CHECK_BUFFER (buffer
);
3668 && ! EQ (Fmarker_buffer (beg
), buffer
))
3669 error ("Marker points into wrong buffer");
3671 && ! EQ (Fmarker_buffer (end
), buffer
))
3672 error ("Marker points into wrong buffer");
3674 CHECK_NUMBER_COERCE_MARKER (beg
);
3675 CHECK_NUMBER_COERCE_MARKER (end
);
3677 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3678 return Fdelete_overlay (overlay
);
3680 if (XINT (beg
) > XINT (end
))
3683 temp
= beg
; beg
= end
; end
= temp
;
3686 specbind (Qinhibit_quit
, Qt
);
3688 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3689 b
= XBUFFER (buffer
);
3690 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3692 /* If the overlay has changed buffers, do a thorough redisplay. */
3693 if (!EQ (buffer
, obuffer
))
3695 /* Redisplay where the overlay was. */
3696 if (!NILP (obuffer
))
3701 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3702 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3704 modify_overlay (ob
, o_beg
, o_end
);
3707 /* Redisplay where the overlay is going to be. */
3708 modify_overlay (b
, XINT (beg
), XINT (end
));
3711 /* Redisplay the area the overlay has just left, or just enclosed. */
3715 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3716 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3718 if (o_beg
== XINT (beg
))
3719 modify_overlay (b
, o_end
, XINT (end
));
3720 else if (o_end
== XINT (end
))
3721 modify_overlay (b
, o_beg
, XINT (beg
));
3724 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3725 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3726 modify_overlay (b
, o_beg
, o_end
);
3730 if (!NILP (obuffer
))
3733 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3735 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3736 eassert (XOVERLAY (overlay
)->next
== NULL
);
3739 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3740 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3742 /* Put the overlay on the wrong list. */
3743 end
= OVERLAY_END (overlay
);
3744 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3746 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3747 b
->overlays_after
= XOVERLAY (overlay
);
3751 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3752 b
->overlays_before
= XOVERLAY (overlay
);
3755 /* This puts it in the right list, and in the right order. */
3756 recenter_overlay_lists (b
, b
->overlay_center
);
3758 return unbind_to (count
, overlay
);
3761 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3762 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3764 Lisp_Object overlay
;
3768 int count
= SPECPDL_INDEX ();
3770 CHECK_OVERLAY (overlay
);
3772 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3776 b
= XBUFFER (buffer
);
3777 specbind (Qinhibit_quit
, Qt
);
3779 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3780 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3781 eassert (XOVERLAY (overlay
)->next
== NULL
);
3783 marker_position (OVERLAY_START (overlay
)),
3784 marker_position (OVERLAY_END (overlay
)));
3785 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3786 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3788 /* When deleting an overlay with before or after strings, turn off
3789 display optimizations for the affected buffer, on the basis that
3790 these strings may contain newlines. This is easier to do than to
3791 check for that situation during redisplay. */
3792 if (!windows_or_buffers_changed
3793 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3794 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3795 b
->prevent_redisplay_optimizations_p
= 1;
3797 return unbind_to (count
, Qnil
);
3800 /* Overlay dissection functions. */
3802 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3803 doc
: /* Return the position at which OVERLAY starts. */)
3805 Lisp_Object overlay
;
3807 CHECK_OVERLAY (overlay
);
3809 return (Fmarker_position (OVERLAY_START (overlay
)));
3812 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3813 doc
: /* Return the position at which OVERLAY ends. */)
3815 Lisp_Object overlay
;
3817 CHECK_OVERLAY (overlay
);
3819 return (Fmarker_position (OVERLAY_END (overlay
)));
3822 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3823 doc
: /* Return the buffer OVERLAY belongs to. */)
3825 Lisp_Object overlay
;
3827 CHECK_OVERLAY (overlay
);
3829 return Fmarker_buffer (OVERLAY_START (overlay
));
3832 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3833 doc
: /* Return a list of the properties on OVERLAY.
3834 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3837 Lisp_Object overlay
;
3839 CHECK_OVERLAY (overlay
);
3841 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3845 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3846 doc
: /* Return a list of the overlays that contain position POS. */)
3851 Lisp_Object
*overlay_vec
;
3855 CHECK_NUMBER_COERCE_MARKER (pos
);
3858 /* We can't use alloca here because overlays_at can call xrealloc. */
3859 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3861 /* Put all the overlays we want in a vector in overlay_vec.
3862 Store the length in len. */
3863 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3864 (int *) 0, (int *) 0, 0);
3866 /* Make a list of them all. */
3867 result
= Flist (noverlays
, overlay_vec
);
3869 xfree (overlay_vec
);
3873 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3874 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3875 Overlap means that at least one character is contained within the overlay
3876 and also contained within the specified region.
3877 Empty overlays are included in the result if they are located at BEG
3878 or between BEG and END. */)
3880 Lisp_Object beg
, end
;
3883 Lisp_Object
*overlay_vec
;
3887 CHECK_NUMBER_COERCE_MARKER (beg
);
3888 CHECK_NUMBER_COERCE_MARKER (end
);
3891 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3893 /* Put all the overlays we want in a vector in overlay_vec.
3894 Store the length in len. */
3895 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3896 (int *) 0, (int *) 0);
3898 /* Make a list of them all. */
3899 result
= Flist (noverlays
, overlay_vec
);
3901 xfree (overlay_vec
);
3905 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3907 doc
: /* Return the next position after POS where an overlay starts or ends.
3908 If there are no more overlay boundaries after POS, return (point-max). */)
3914 Lisp_Object
*overlay_vec
;
3918 CHECK_NUMBER_COERCE_MARKER (pos
);
3921 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3923 /* Put all the overlays we want in a vector in overlay_vec.
3924 Store the length in len.
3925 endpos gets the position where the next overlay starts. */
3926 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3927 &endpos
, (int *) 0, 1);
3929 /* If any of these overlays ends before endpos,
3930 use its ending point instead. */
3931 for (i
= 0; i
< noverlays
; i
++)
3936 oend
= OVERLAY_END (overlay_vec
[i
]);
3937 oendpos
= OVERLAY_POSITION (oend
);
3938 if (oendpos
< endpos
)
3942 xfree (overlay_vec
);
3943 return make_number (endpos
);
3946 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3947 Sprevious_overlay_change
, 1, 1, 0,
3948 doc
: /* Return the previous position before POS where an overlay starts or ends.
3949 If there are no more overlay boundaries before POS, return (point-min). */)
3955 Lisp_Object
*overlay_vec
;
3958 CHECK_NUMBER_COERCE_MARKER (pos
);
3960 /* At beginning of buffer, we know the answer;
3961 avoid bug subtracting 1 below. */
3962 if (XINT (pos
) == BEGV
)
3966 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3968 /* Put all the overlays we want in a vector in overlay_vec.
3969 Store the length in len.
3970 prevpos gets the position of the previous change. */
3971 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3972 (int *) 0, &prevpos
, 1);
3974 xfree (overlay_vec
);
3975 return make_number (prevpos
);
3978 /* These functions are for debugging overlays. */
3980 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3981 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3982 The car has all the overlays before the overlay center;
3983 the cdr has all the overlays after the overlay center.
3984 Recentering overlays moves overlays between these lists.
3985 The lists you get are copies, so that changing them has no effect.
3986 However, the overlays you get are the real objects that the buffer uses. */)
3989 struct Lisp_Overlay
*ol
;
3990 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
3991 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
3994 before
= Fcons (tmp
, before
);
3996 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
3999 after
= Fcons (tmp
, after
);
4001 return Fcons (Fnreverse (before
), Fnreverse (after
));
4004 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4005 doc
: /* Recenter the overlays of the current buffer around position POS.
4006 That makes overlay lookup faster for positions near POS (but perhaps slower
4007 for positions far away from POS). */)
4011 CHECK_NUMBER_COERCE_MARKER (pos
);
4013 recenter_overlay_lists (current_buffer
, XINT (pos
));
4017 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4018 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4020 Lisp_Object overlay
, prop
;
4022 CHECK_OVERLAY (overlay
);
4023 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4026 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4027 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4028 (overlay
, prop
, value
)
4029 Lisp_Object overlay
, prop
, value
;
4031 Lisp_Object tail
, buffer
;
4034 CHECK_OVERLAY (overlay
);
4036 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4038 for (tail
= XOVERLAY (overlay
)->plist
;
4039 CONSP (tail
) && CONSP (XCDR (tail
));
4040 tail
= XCDR (XCDR (tail
)))
4041 if (EQ (XCAR (tail
), prop
))
4043 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4044 XSETCAR (XCDR (tail
), value
);
4047 /* It wasn't in the list, so add it to the front. */
4048 changed
= !NILP (value
);
4049 XOVERLAY (overlay
)->plist
4050 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4052 if (! NILP (buffer
))
4055 modify_overlay (XBUFFER (buffer
),
4056 marker_position (OVERLAY_START (overlay
)),
4057 marker_position (OVERLAY_END (overlay
)));
4058 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4059 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4060 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4061 Fdelete_overlay (overlay
);
4066 /* Subroutine of report_overlay_modification. */
4068 /* Lisp vector holding overlay hook functions to call.
4069 Vector elements come in pairs.
4070 Each even-index element is a list of hook functions.
4071 The following odd-index element is the overlay they came from.
4073 Before the buffer change, we fill in this vector
4074 as we call overlay hook functions.
4075 After the buffer change, we get the functions to call from this vector.
4076 This way we always call the same functions before and after the change. */
4077 static Lisp_Object last_overlay_modification_hooks
;
4079 /* Number of elements actually used in last_overlay_modification_hooks. */
4080 static int last_overlay_modification_hooks_used
;
4082 /* Add one functionlist/overlay pair
4083 to the end of last_overlay_modification_hooks. */
4086 add_overlay_mod_hooklist (functionlist
, overlay
)
4087 Lisp_Object functionlist
, overlay
;
4089 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4091 if (last_overlay_modification_hooks_used
== oldsize
)
4094 old
= last_overlay_modification_hooks
;
4095 last_overlay_modification_hooks
4096 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
4097 bcopy (XVECTOR (old
)->contents
,
4098 XVECTOR (last_overlay_modification_hooks
)->contents
,
4099 sizeof (Lisp_Object
) * oldsize
);
4101 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = functionlist
;
4102 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = overlay
;
4105 /* Run the modification-hooks of overlays that include
4106 any part of the text in START to END.
4107 If this change is an insertion, also
4108 run the insert-before-hooks of overlay starting at END,
4109 and the insert-after-hooks of overlay ending at START.
4111 This is called both before and after the modification.
4112 AFTER is nonzero when we call after the modification.
4114 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4115 When AFTER is nonzero, they are the start position,
4116 the position after the inserted new text,
4117 and the length of deleted or replaced old text. */
4120 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4121 Lisp_Object start
, end
;
4123 Lisp_Object arg1
, arg2
, arg3
;
4125 Lisp_Object prop
, overlay
;
4126 struct Lisp_Overlay
*tail
;
4127 /* 1 if this change is an insertion. */
4128 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4129 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4134 /* We used to run the functions as soon as we found them and only register
4135 them in last_overlay_modification_hooks for the purpose of the `after'
4136 case. But running elisp code as we traverse the list of overlays is
4137 painful because the list can be modified by the elisp code so we had to
4138 copy at several places. We now simply do a read-only traversal that
4139 only collects the functions to run and we run them afterwards. It's
4140 simpler, especially since all the code was already there. -stef */
4144 /* We are being called before a change.
4145 Scan the overlays to find the functions to call. */
4146 last_overlay_modification_hooks_used
= 0;
4147 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4149 int startpos
, endpos
;
4150 Lisp_Object ostart
, oend
;
4152 XSETMISC (overlay
, tail
);
4154 ostart
= OVERLAY_START (overlay
);
4155 oend
= OVERLAY_END (overlay
);
4156 endpos
= OVERLAY_POSITION (oend
);
4157 if (XFASTINT (start
) > endpos
)
4159 startpos
= OVERLAY_POSITION (ostart
);
4160 if (insertion
&& (XFASTINT (start
) == startpos
4161 || XFASTINT (end
) == startpos
))
4163 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4165 add_overlay_mod_hooklist (prop
, overlay
);
4167 if (insertion
&& (XFASTINT (start
) == endpos
4168 || XFASTINT (end
) == endpos
))
4170 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4172 add_overlay_mod_hooklist (prop
, overlay
);
4174 /* Test for intersecting intervals. This does the right thing
4175 for both insertion and deletion. */
4176 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4178 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4180 add_overlay_mod_hooklist (prop
, overlay
);
4184 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4186 int startpos
, endpos
;
4187 Lisp_Object ostart
, oend
;
4189 XSETMISC (overlay
, tail
);
4191 ostart
= OVERLAY_START (overlay
);
4192 oend
= OVERLAY_END (overlay
);
4193 startpos
= OVERLAY_POSITION (ostart
);
4194 endpos
= OVERLAY_POSITION (oend
);
4195 if (XFASTINT (end
) < startpos
)
4197 if (insertion
&& (XFASTINT (start
) == startpos
4198 || XFASTINT (end
) == startpos
))
4200 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4202 add_overlay_mod_hooklist (prop
, overlay
);
4204 if (insertion
&& (XFASTINT (start
) == endpos
4205 || XFASTINT (end
) == endpos
))
4207 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4209 add_overlay_mod_hooklist (prop
, overlay
);
4211 /* Test for intersecting intervals. This does the right thing
4212 for both insertion and deletion. */
4213 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4215 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4217 add_overlay_mod_hooklist (prop
, overlay
);
4222 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4224 /* Call the functions recorded in last_overlay_modification_hooks.
4225 First copy the vector contents, in case some of these hooks
4226 do subsequent modification of the buffer. */
4227 int size
= last_overlay_modification_hooks_used
;
4228 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4231 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4232 copy
, size
* sizeof (Lisp_Object
));
4234 gcpro1
.nvars
= size
;
4236 for (i
= 0; i
< size
;)
4238 Lisp_Object prop
, overlay
;
4240 overlay
= copy
[i
++];
4241 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4248 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4249 Lisp_Object list
, overlay
;
4251 Lisp_Object arg1
, arg2
, arg3
;
4253 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4255 GCPRO4 (list
, arg1
, arg2
, arg3
);
4257 while (CONSP (list
))
4260 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4262 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4268 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4271 evaporate_overlays (pos
)
4274 Lisp_Object overlay
, hit_list
;
4275 struct Lisp_Overlay
*tail
;
4278 if (pos
<= current_buffer
->overlay_center
)
4279 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4282 XSETMISC (overlay
, tail
);
4283 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4286 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4287 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4288 hit_list
= Fcons (overlay
, hit_list
);
4291 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4294 XSETMISC (overlay
, tail
);
4295 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4298 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4299 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4300 hit_list
= Fcons (overlay
, hit_list
);
4302 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4303 Fdelete_overlay (XCAR (hit_list
));
4306 /* Somebody has tried to store a value with an unacceptable type
4307 in the slot with offset OFFSET. */
4310 buffer_slot_type_mismatch (offset
)
4316 switch (XINT (PER_BUFFER_TYPE (offset
)))
4319 type_name
= "integers";
4323 type_name
= "strings";
4327 type_name
= "symbols";
4334 sym
= PER_BUFFER_SYMBOL (offset
);
4335 error ("Only %s should be stored in the buffer-local variable %s",
4336 type_name
, SDATA (SYMBOL_NAME (sym
)));
4340 /***********************************************************************
4341 Allocation with mmap
4342 ***********************************************************************/
4344 #ifdef USE_MMAP_FOR_BUFFERS
4346 #include <sys/types.h>
4347 #include <sys/mman.h>
4350 #ifdef MAP_ANONYMOUS
4351 #define MAP_ANON MAP_ANONYMOUS
4358 #define MAP_FAILED ((void *) -1)
4371 /* Memory is allocated in regions which are mapped using mmap(2).
4372 The current implementation lets the system select mapped
4373 addresses; we're not using MAP_FIXED in general, except when
4374 trying to enlarge regions.
4376 Each mapped region starts with a mmap_region structure, the user
4377 area starts after that structure, aligned to MEM_ALIGN.
4379 +-----------------------+
4380 | struct mmap_info + |
4382 +-----------------------+
4386 +-----------------------+ */
4390 /* User-specified size. */
4391 size_t nbytes_specified
;
4393 /* Number of bytes mapped */
4394 size_t nbytes_mapped
;
4396 /* Pointer to the location holding the address of the memory
4397 allocated with the mmap'd block. The variable actually points
4398 after this structure. */
4401 /* Next and previous in list of all mmap'd regions. */
4402 struct mmap_region
*next
, *prev
;
4405 /* Doubly-linked list of mmap'd regions. */
4407 static struct mmap_region
*mmap_regions
;
4409 /* File descriptor for mmap. If we don't have anonymous mapping,
4410 /dev/zero will be opened on it. */
4414 /* Temporary storage for mmap_set_vars, see there. */
4416 static struct mmap_region
*mmap_regions_1
;
4417 static int mmap_fd_1
;
4419 /* Page size on this system. */
4421 static int mmap_page_size
;
4423 /* 1 means mmap has been intialized. */
4425 static int mmap_initialized_p
;
4427 /* Value is X rounded up to the next multiple of N. */
4429 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4431 /* Size of mmap_region structure plus padding. */
4433 #define MMAP_REGION_STRUCT_SIZE \
4434 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4436 /* Given a pointer P to the start of the user-visible part of a mapped
4437 region, return a pointer to the start of the region. */
4439 #define MMAP_REGION(P) \
4440 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4442 /* Given a pointer P to the start of a mapped region, return a pointer
4443 to the start of the user-visible part of the region. */
4445 #define MMAP_USER_AREA(P) \
4446 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4448 #define MEM_ALIGN sizeof (double)
4450 /* Predicate returning true if part of the address range [START .. END]
4451 is currently mapped. Used to prevent overwriting an existing
4454 Default is to conservativly assume the address range is occupied by
4455 something else. This can be overridden by system configuration
4456 files if system-specific means to determine this exists. */
4458 #ifndef MMAP_ALLOCATED_P
4459 #define MMAP_ALLOCATED_P(start, end) 1
4462 /* Function prototypes. */
4464 static int mmap_free_1
P_ ((struct mmap_region
*));
4465 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4466 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4467 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4468 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4469 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4470 static void mmap_init
P_ ((void));
4473 /* Return a region overlapping address range START...END, or null if
4474 none. END is not including, i.e. the last byte in the range
4477 static struct mmap_region
*
4478 mmap_find (start
, end
)
4479 POINTER_TYPE
*start
, *end
;
4481 struct mmap_region
*r
;
4482 char *s
= (char *) start
, *e
= (char *) end
;
4484 for (r
= mmap_regions
; r
; r
= r
->next
)
4486 char *rstart
= (char *) r
;
4487 char *rend
= rstart
+ r
->nbytes_mapped
;
4489 if (/* First byte of range, i.e. START, in this region? */
4490 (s
>= rstart
&& s
< rend
)
4491 /* Last byte of range, i.e. END - 1, in this region? */
4492 || (e
> rstart
&& e
<= rend
)
4493 /* First byte of this region in the range? */
4494 || (rstart
>= s
&& rstart
< e
)
4495 /* Last byte of this region in the range? */
4496 || (rend
> s
&& rend
<= e
))
4504 /* Unmap a region. P is a pointer to the start of the user-araa of
4505 the region. Value is non-zero if successful. */
4509 struct mmap_region
*r
;
4512 r
->next
->prev
= r
->prev
;
4514 r
->prev
->next
= r
->next
;
4516 mmap_regions
= r
->next
;
4518 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4520 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4528 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4529 Value is non-zero if successful. */
4532 mmap_enlarge (r
, npages
)
4533 struct mmap_region
*r
;
4536 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4542 /* Unmap pages at the end of the region. */
4543 nbytes
= - npages
* mmap_page_size
;
4544 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4545 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4548 r
->nbytes_mapped
-= nbytes
;
4552 else if (npages
> 0)
4554 nbytes
= npages
* mmap_page_size
;
4556 /* Try to map additional pages at the end of the region. We
4557 cannot do this if the address range is already occupied by
4558 something else because mmap deletes any previous mapping.
4559 I'm not sure this is worth doing, let's see. */
4560 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4564 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4565 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4566 if (p
== MAP_FAILED
)
4567 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4568 else if (p
!= (POINTER_TYPE
*) region_end
)
4570 /* Kernels are free to choose a different address. In
4571 that case, unmap what we've mapped above; we have
4573 if (munmap (p
, nbytes
) == -1)
4574 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4578 r
->nbytes_mapped
+= nbytes
;
4588 /* Set or reset variables holding references to mapped regions. If
4589 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4590 non-zero, set all variables to the start of the user-areas
4593 This function is called from Fdump_emacs to ensure that the dumped
4594 Emacs doesn't contain references to memory that won't be mapped
4595 when Emacs starts. */
4598 mmap_set_vars (restore_p
)
4601 struct mmap_region
*r
;
4605 mmap_regions
= mmap_regions_1
;
4606 mmap_fd
= mmap_fd_1
;
4607 for (r
= mmap_regions
; r
; r
= r
->next
)
4608 *r
->var
= MMAP_USER_AREA (r
);
4612 for (r
= mmap_regions
; r
; r
= r
->next
)
4614 mmap_regions_1
= mmap_regions
;
4615 mmap_regions
= NULL
;
4616 mmap_fd_1
= mmap_fd
;
4622 /* Allocate a block of storage large enough to hold NBYTES bytes of
4623 data. A pointer to the data is returned in *VAR. VAR is thus the
4624 address of some variable which will use the data area.
4626 The allocation of 0 bytes is valid.
4628 If we can't allocate the necessary memory, set *VAR to null, and
4631 static POINTER_TYPE
*
4632 mmap_alloc (var
, nbytes
)
4641 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4642 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4645 if (p
== MAP_FAILED
)
4647 if (errno
!= ENOMEM
)
4648 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4653 struct mmap_region
*r
= (struct mmap_region
*) p
;
4655 r
->nbytes_specified
= nbytes
;
4656 r
->nbytes_mapped
= map
;
4659 r
->next
= mmap_regions
;
4664 p
= MMAP_USER_AREA (p
);
4671 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4672 resize it to size NBYTES. Change *VAR to reflect the new block,
4673 and return this value. If more memory cannot be allocated, then
4674 leave *VAR unchanged, and return null. */
4676 static POINTER_TYPE
*
4677 mmap_realloc (var
, nbytes
)
4681 POINTER_TYPE
*result
;
4686 result
= mmap_alloc (var
, nbytes
);
4687 else if (nbytes
== 0)
4690 result
= mmap_alloc (var
, nbytes
);
4694 struct mmap_region
*r
= MMAP_REGION (*var
);
4695 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4700 POINTER_TYPE
*old_ptr
= *var
;
4702 /* Try to map additional pages at the end of the region.
4703 If that fails, allocate a new region, copy data
4704 from the old region, then free it. */
4705 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4708 r
->nbytes_specified
= nbytes
;
4709 *var
= result
= old_ptr
;
4711 else if (mmap_alloc (var
, nbytes
))
4713 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4714 mmap_free_1 (MMAP_REGION (old_ptr
));
4716 r
= MMAP_REGION (result
);
4717 r
->nbytes_specified
= nbytes
;
4725 else if (room
- nbytes
>= mmap_page_size
)
4727 /* Shrinking by at least a page. Let's give some
4728 memory back to the system.
4730 The extra parens are to make the division happens first,
4731 on positive values, so we know it will round towards
4733 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4735 r
->nbytes_specified
= nbytes
;
4739 /* Leave it alone. */
4741 r
->nbytes_specified
= nbytes
;
4749 /* Free a block of relocatable storage whose data is pointed to by
4750 PTR. Store 0 in *PTR to show there's no block allocated. */
4760 mmap_free_1 (MMAP_REGION (*var
));
4766 /* Perform necessary intializations for the use of mmap. */
4772 /* The value of mmap_fd is initially 0 in temacs, and -1
4773 in a dumped Emacs. */
4776 /* No anonymous mmap -- we need the file descriptor. */
4777 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4779 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4781 #endif /* MAP_ANON == 0 */
4783 if (mmap_initialized_p
)
4785 mmap_initialized_p
= 1;
4791 mmap_page_size
= getpagesize ();
4794 #endif /* USE_MMAP_FOR_BUFFERS */
4798 /***********************************************************************
4799 Buffer-text Allocation
4800 ***********************************************************************/
4803 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4804 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4805 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4806 #endif /* REL_ALLOC */
4809 /* Allocate NBYTES bytes for buffer B's text buffer. */
4812 alloc_buffer_text (b
, nbytes
)
4819 #if defined USE_MMAP_FOR_BUFFERS
4820 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4821 #elif defined REL_ALLOC
4822 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4824 p
= xmalloc (nbytes
);
4833 b
->text
->beg
= (unsigned char *) p
;
4837 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4841 enlarge_buffer_text (b
, delta
)
4846 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4849 #if defined USE_MMAP_FOR_BUFFERS
4850 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4851 #elif defined REL_ALLOC
4852 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4854 p
= xrealloc (b
->text
->beg
, nbytes
);
4863 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4868 /* Free buffer B's text buffer. */
4871 free_buffer_text (b
)
4876 #if defined USE_MMAP_FOR_BUFFERS
4877 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4878 #elif defined REL_ALLOC
4879 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4881 xfree (b
->text
->beg
);
4884 BUF_BEG_ADDR (b
) = NULL
;
4890 /***********************************************************************
4892 ***********************************************************************/
4899 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4901 /* Make sure all markable slots in buffer_defaults
4902 are initialized reasonably, so mark_buffer won't choke. */
4903 reset_buffer (&buffer_defaults
);
4904 reset_buffer_local_variables (&buffer_defaults
, 1);
4905 reset_buffer (&buffer_local_symbols
);
4906 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4907 /* Prevent GC from getting confused. */
4908 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4909 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4910 BUF_INTERVALS (&buffer_defaults
) = 0;
4911 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4912 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4913 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4915 /* Set up the default values of various buffer slots. */
4916 /* Must do these before making the first buffer! */
4918 /* real setup is done in bindings.el */
4919 buffer_defaults
.mode_line_format
= build_string ("%-");
4920 buffer_defaults
.header_line_format
= Qnil
;
4921 buffer_defaults
.abbrev_mode
= Qnil
;
4922 buffer_defaults
.overwrite_mode
= Qnil
;
4923 buffer_defaults
.case_fold_search
= Qt
;
4924 buffer_defaults
.auto_fill_function
= Qnil
;
4925 buffer_defaults
.selective_display
= Qnil
;
4927 buffer_defaults
.selective_display_ellipses
= Qt
;
4929 buffer_defaults
.abbrev_table
= Qnil
;
4930 buffer_defaults
.display_table
= Qnil
;
4931 buffer_defaults
.undo_list
= Qnil
;
4932 buffer_defaults
.mark_active
= Qnil
;
4933 buffer_defaults
.file_format
= Qnil
;
4934 buffer_defaults
.overlays_before
= NULL
;
4935 buffer_defaults
.overlays_after
= NULL
;
4936 buffer_defaults
.overlay_center
= BEG
;
4938 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4939 buffer_defaults
.truncate_lines
= Qnil
;
4940 buffer_defaults
.ctl_arrow
= Qt
;
4941 buffer_defaults
.direction_reversed
= Qnil
;
4942 buffer_defaults
.cursor_type
= Qt
;
4943 buffer_defaults
.extra_line_spacing
= Qnil
;
4946 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4948 buffer_defaults
.enable_multibyte_characters
= Qt
;
4949 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4950 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4951 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4952 buffer_defaults
.cache_long_line_scans
= Qnil
;
4953 buffer_defaults
.file_truename
= Qnil
;
4954 XSETFASTINT (buffer_defaults
.display_count
, 0);
4955 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
4956 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
4957 buffer_defaults
.left_fringe_width
= Qnil
;
4958 buffer_defaults
.right_fringe_width
= Qnil
;
4959 buffer_defaults
.fringes_outside_margins
= Qnil
;
4960 buffer_defaults
.scroll_bar_width
= Qnil
;
4961 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
4962 buffer_defaults
.indicate_empty_lines
= Qnil
;
4963 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
4964 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4965 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4966 buffer_defaults
.display_time
= Qnil
;
4968 /* Assign the local-flags to the slots that have default values.
4969 The local flag is a bit that is used in the buffer
4970 to say that it has its own local value for the slot.
4971 The local flag bits are in the local_var_flags slot of the buffer. */
4973 /* Nothing can work if this isn't true */
4974 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4976 /* 0 means not a lisp var, -1 means always local, else mask */
4977 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4978 XSETINT (buffer_local_flags
.filename
, -1);
4979 XSETINT (buffer_local_flags
.directory
, -1);
4980 XSETINT (buffer_local_flags
.backed_up
, -1);
4981 XSETINT (buffer_local_flags
.save_length
, -1);
4982 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
4983 XSETINT (buffer_local_flags
.read_only
, -1);
4984 XSETINT (buffer_local_flags
.major_mode
, -1);
4985 XSETINT (buffer_local_flags
.mode_name
, -1);
4986 XSETINT (buffer_local_flags
.undo_list
, -1);
4987 XSETINT (buffer_local_flags
.mark_active
, -1);
4988 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
4989 XSETINT (buffer_local_flags
.file_truename
, -1);
4990 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
4991 XSETINT (buffer_local_flags
.file_format
, -1);
4992 XSETINT (buffer_local_flags
.display_count
, -1);
4993 XSETINT (buffer_local_flags
.display_time
, -1);
4994 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
4997 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
4998 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
4999 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5000 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5001 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5002 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5004 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5006 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5007 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5008 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5009 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5010 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5011 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5012 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5014 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5015 /* Make this one a permanent local. */
5016 buffer_permanent_local_flags
[idx
++] = 1;
5018 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5019 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5020 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5021 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
5022 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5023 /* Make this one a permanent local. */
5024 buffer_permanent_local_flags
[idx
++] = 1;
5025 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5026 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5027 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5028 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5029 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5030 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5031 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5032 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5033 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5034 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5035 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5036 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5037 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5038 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5040 /* Need more room? */
5041 if (idx
>= MAX_PER_BUFFER_VARS
)
5043 last_per_buffer_idx
= idx
;
5045 Vbuffer_alist
= Qnil
;
5049 QSFundamental
= build_string ("Fundamental");
5051 Qfundamental_mode
= intern ("fundamental-mode");
5052 buffer_defaults
.major_mode
= Qfundamental_mode
;
5054 Qmode_class
= intern ("mode-class");
5056 Qprotected_field
= intern ("protected-field");
5058 Qpermanent_local
= intern ("permanent-local");
5060 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5061 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5063 Qucs_set_table_for_input
= intern ("ucs-set-table-for-input");
5065 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
5067 /* super-magic invisible buffer */
5068 Vbuffer_alist
= Qnil
;
5070 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5072 inhibit_modification_hooks
= 0;
5078 char buf
[MAXPATHLEN
+ 1];
5080 struct stat dotstat
, pwdstat
;
5084 #ifdef USE_MMAP_FOR_BUFFERS
5086 /* When using the ralloc implementation based on mmap(2), buffer
5087 text pointers will have been set to null in the dumped Emacs.
5091 for (b
= all_buffers
; b
; b
= b
->next
)
5092 if (b
->text
->beg
== NULL
)
5093 enlarge_buffer_text (b
, 0);
5095 #endif /* USE_MMAP_FOR_BUFFERS */
5097 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5098 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5099 Fset_buffer_multibyte (Qnil
);
5101 /* If PWD is accurate, use it instead of calling getwd. PWD is
5102 sometimes a nicer name, and using it may avoid a fatal error if a
5103 parent directory is searchable but not readable. */
5104 if ((pwd
= getenv ("PWD")) != 0
5105 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
5106 && stat (pwd
, &pwdstat
) == 0
5107 && stat (".", &dotstat
) == 0
5108 && dotstat
.st_ino
== pwdstat
.st_ino
5109 && dotstat
.st_dev
== pwdstat
.st_dev
5110 && strlen (pwd
) < MAXPATHLEN
)
5113 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
5114 fatal ("`getcwd' failed: %s\n", strerror (errno
));
5116 else if (getwd (buf
) == 0)
5117 fatal ("`getwd' failed: %s\n", buf
);
5121 /* Maybe this should really use some standard subroutine
5122 whose definition is filename syntax dependent. */
5124 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
5126 buf
[rc
] = DIRECTORY_SEP
;
5129 #endif /* not VMS */
5131 current_buffer
->directory
= build_string (buf
);
5133 /* Add /: to the front of the name
5134 if it would otherwise be treated as magic. */
5135 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5137 /* If the default dir is just /, TEMP is non-nil
5138 because of the ange-ftp completion handler.
5139 However, it is not necessary to turn / into /:/.
5140 So avoid doing that. */
5141 && strcmp ("/", SDATA (current_buffer
->directory
)))
5142 current_buffer
->directory
5143 = concat2 (build_string ("/:"), current_buffer
->directory
);
5145 temp
= get_minibuffer (0);
5146 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5149 /* initialize the buffer routines */
5153 staticpro (&last_overlay_modification_hooks
);
5154 last_overlay_modification_hooks
5155 = Fmake_vector (make_number (10), Qnil
);
5157 staticpro (&Vbuffer_defaults
);
5158 staticpro (&Vbuffer_local_symbols
);
5159 staticpro (&Qfundamental_mode
);
5160 staticpro (&Qmode_class
);
5161 staticpro (&QSFundamental
);
5162 staticpro (&Vbuffer_alist
);
5163 staticpro (&Qprotected_field
);
5164 staticpro (&Qpermanent_local
);
5165 staticpro (&Qkill_buffer_hook
);
5166 Qoverlayp
= intern ("overlayp");
5167 staticpro (&Qoverlayp
);
5168 Qevaporate
= intern ("evaporate");
5169 staticpro (&Qevaporate
);
5170 Qmodification_hooks
= intern ("modification-hooks");
5171 staticpro (&Qmodification_hooks
);
5172 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5173 staticpro (&Qinsert_in_front_hooks
);
5174 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5175 staticpro (&Qinsert_behind_hooks
);
5176 Qget_file_buffer
= intern ("get-file-buffer");
5177 staticpro (&Qget_file_buffer
);
5178 Qpriority
= intern ("priority");
5179 staticpro (&Qpriority
);
5180 Qwindow
= intern ("window");
5181 staticpro (&Qwindow
);
5182 Qbefore_string
= intern ("before-string");
5183 staticpro (&Qbefore_string
);
5184 Qafter_string
= intern ("after-string");
5185 staticpro (&Qafter_string
);
5186 Qfirst_change_hook
= intern ("first-change-hook");
5187 staticpro (&Qfirst_change_hook
);
5188 Qbefore_change_functions
= intern ("before-change-functions");
5189 staticpro (&Qbefore_change_functions
);
5190 Qafter_change_functions
= intern ("after-change-functions");
5191 staticpro (&Qafter_change_functions
);
5192 staticpro (&Qucs_set_table_for_input
);
5194 Qkill_buffer_query_functions
= intern ("kill-buffer-query-functions");
5195 staticpro (&Qkill_buffer_query_functions
);
5197 Fput (Qprotected_field
, Qerror_conditions
,
5198 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5199 Fput (Qprotected_field
, Qerror_message
,
5200 build_string ("Attempt to modify a protected field"));
5202 /* All these use DEFVAR_LISP_NOPRO because the slots in
5203 buffer_defaults will all be marked via Vbuffer_defaults. */
5205 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5206 &buffer_defaults
.mode_line_format
,
5207 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5208 This is the same as (default-value 'mode-line-format). */);
5210 DEFVAR_LISP_NOPRO ("default-header-line-format",
5211 &buffer_defaults
.header_line_format
,
5212 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5213 This is the same as (default-value 'header-line-format). */);
5215 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5216 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5217 This is the same as (default-value 'cursor-type). */);
5219 DEFVAR_LISP_NOPRO ("default-line-spacing",
5220 &buffer_defaults
.extra_line_spacing
,
5221 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5222 This is the same as (default-value 'line-spacing). */);
5224 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5225 &buffer_defaults
.abbrev_mode
,
5226 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5227 This is the same as (default-value 'abbrev-mode). */);
5229 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5230 &buffer_defaults
.ctl_arrow
,
5231 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5232 This is the same as (default-value 'ctl-arrow). */);
5234 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5235 &buffer_defaults
.direction_reversed
,
5236 doc
: /* Default value of `direction-reversed' for buffers that do not override it.
5237 This is the same as (default-value 'direction-reversed). */);
5239 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5240 &buffer_defaults
.enable_multibyte_characters
,
5241 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5242 This is the same as (default-value 'enable-multibyte-characters). */);
5244 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5245 &buffer_defaults
.buffer_file_coding_system
,
5246 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5247 This is the same as (default-value 'buffer-file-coding-system). */);
5249 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5250 &buffer_defaults
.truncate_lines
,
5251 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5252 This is the same as (default-value 'truncate-lines). */);
5254 DEFVAR_LISP_NOPRO ("default-fill-column",
5255 &buffer_defaults
.fill_column
,
5256 doc
: /* Default value of `fill-column' for buffers that do not override it.
5257 This is the same as (default-value 'fill-column). */);
5259 DEFVAR_LISP_NOPRO ("default-left-margin",
5260 &buffer_defaults
.left_margin
,
5261 doc
: /* Default value of `left-margin' for buffers that do not override it.
5262 This is the same as (default-value 'left-margin). */);
5264 DEFVAR_LISP_NOPRO ("default-tab-width",
5265 &buffer_defaults
.tab_width
,
5266 doc
: /* Default value of `tab-width' for buffers that do not override it.
5267 This is the same as (default-value 'tab-width). */);
5269 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5270 &buffer_defaults
.case_fold_search
,
5271 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5272 This is the same as (default-value 'case-fold-search). */);
5275 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5276 &buffer_defaults
.buffer_file_type
,
5277 doc
: /* Default file type for buffers that do not override it.
5278 This is the same as (default-value 'buffer-file-type).
5279 The file type is nil for text, t for binary. */);
5282 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5283 &buffer_defaults
.left_margin_cols
,
5284 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5285 This is the same as (default-value 'left-margin-width). */);
5287 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5288 &buffer_defaults
.right_margin_cols
,
5289 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5290 This is the same as (default-value 'right-margin-width). */);
5292 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5293 &buffer_defaults
.left_fringe_width
,
5294 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5295 This is the same as (default-value 'left-fringe-width). */);
5297 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5298 &buffer_defaults
.right_fringe_width
,
5299 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5300 This is the same as (default-value 'right-fringe-width). */);
5302 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5303 &buffer_defaults
.fringes_outside_margins
,
5304 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5305 This is the same as (default-value 'fringes-outside-margins). */);
5307 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5308 &buffer_defaults
.scroll_bar_width
,
5309 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5310 This is the same as (default-value 'scroll-bar-width). */);
5312 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5313 &buffer_defaults
.vertical_scroll_bar_type
,
5314 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5315 This is the same as (default-value 'vertical-scroll-bar). */);
5317 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5318 &buffer_defaults
.indicate_empty_lines
,
5319 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5320 This is the same as (default-value 'indicate-empty-lines). */);
5322 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5323 &buffer_defaults
.indicate_buffer_boundaries
,
5324 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5325 This is the same as (default-value 'indicate-buffer-boundaries). */);
5327 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5328 &buffer_defaults
.scroll_up_aggressively
,
5329 doc
: /* Default value of `scroll-up-aggressively'.
5330 This value applies in buffers that don't have their own local values.
5331 This variable is an alias for (default-value 'scroll-up-aggressively). */);
5333 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5334 &buffer_defaults
.scroll_down_aggressively
,
5335 doc
: /* Default value of `scroll-down-aggressively'.
5336 This value applies in buffers that don't have their own local values.
5337 This variable is an alias for (default-value 'scroll-down-aggressively). */);
5339 DEFVAR_PER_BUFFER ("header-line-format",
5340 ¤t_buffer
->header_line_format
,
5342 doc
: /* Analogous to `mode-line-format', but controls the header line.
5343 The header line appears, optionally, at the top of a window;
5344 the mode line appears at the bottom. */);
5346 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5348 doc
: /* Template for displaying mode line for current buffer.
5349 Each buffer has its own value of this variable.
5350 Value may be nil, a string, a symbol or a list or cons cell.
5351 A value of nil means don't display a mode line.
5352 For a symbol, its value is used (but it is ignored if t or nil).
5353 A string appearing directly as the value of a symbol is processed verbatim
5354 in that the %-constructs below are not recognized.
5355 Note that unless the symbol is marked as a `risky-local-variable', all
5356 properties in any strings, as well as all :eval and :propertize forms
5357 in the value of that symbol will be ignored.
5358 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5359 is used as a mode line element. Be careful--FORM should not load any files,
5360 because that can cause an infinite recursion.
5361 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5362 with the specified properties PROPS applied.
5363 For a list whose car is a symbol, the symbol's value is taken,
5364 and if that is non-nil, the cadr of the list is processed recursively.
5365 Otherwise, the caddr of the list (if there is one) is processed.
5366 For a list whose car is a string or list, each element is processed
5367 recursively and the results are effectively concatenated.
5368 For a list whose car is an integer, the cdr of the list is processed
5369 and padded (if the number is positive) or truncated (if negative)
5370 to the width specified by that number.
5371 A string is printed verbatim in the mode line except for %-constructs:
5372 (%-constructs are allowed when the string is the entire mode-line-format
5373 or when it is found in a cons-cell or a list)
5374 %b -- print buffer name. %f -- print visited file name.
5375 %F -- print frame name.
5376 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5377 %& is like %*, but ignore read-only-ness.
5378 % means buffer is read-only and * means it is modified.
5379 For a modified read-only buffer, %* gives % and %+ gives *.
5380 %s -- print process status. %l -- print the current line number.
5381 %c -- print the current column number (this makes editing slower).
5382 To make the column number update correctly in all cases,
5383 `column-number-mode' must be non-nil.
5384 %i -- print the size of the buffer.
5385 %I -- like %i, but use k, M, G, etc., to abbreviate.
5386 %p -- print percent of buffer above top of window, or Top, Bot or All.
5387 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5388 or print Bottom or All.
5389 %m -- print the mode name.
5390 %n -- print Narrow if appropriate.
5391 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5392 %Z -- like %z, but including the end-of-line format.
5393 %[ -- print one [ for each recursive editing level. %] similar.
5394 %% -- print %. %- -- print infinitely many dashes.
5395 Decimal digits after the % specify field width to which to pad. */);
5397 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5398 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5399 nil here means use current buffer's major mode. */);
5401 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5402 make_number (Lisp_Symbol
),
5403 doc
: /* Symbol for current buffer's major mode. */);
5405 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5407 doc
: /* Pretty name of current buffer's major mode (a string). */);
5409 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5410 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5412 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5414 doc
: /* *Non-nil if searches and matches should ignore case. */);
5416 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5417 make_number (Lisp_Int
),
5418 doc
: /* *Column beyond which automatic line-wrapping should happen.
5419 Interactively, you can set this using \\[set-fill-column]. */);
5421 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5422 make_number (Lisp_Int
),
5423 doc
: /* *Column for the default indent-line-function to indent to.
5424 Linefeed indents to this column in Fundamental mode. */);
5426 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5427 make_number (Lisp_Int
),
5428 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5430 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5431 doc
: /* *Non-nil means display control chars with uparrow.
5432 A value of nil means use backslash and octal digits.
5433 This variable does not apply to characters whose display is specified
5434 in the current display table (if there is one). */);
5436 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5437 ¤t_buffer
->enable_multibyte_characters
,
5439 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5440 Otherwise they are regarded as unibyte. This affects the display,
5441 file I/O and the behavior of various editing commands.
5443 This variable is buffer-local but you cannot set it directly;
5444 use the function `set-buffer-multibyte' to change a buffer's representation.
5445 Changing its default value with `setq-default' is supported.
5446 See also variable `default-enable-multibyte-characters' and Info node
5447 `(elisp)Text Representations'. */);
5448 XSYMBOL (intern ("enable-multibyte-characters"))->constant
= 1;
5450 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5451 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5452 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5453 This variable applies to saving the buffer, and also to `write-region'
5454 and other functions that use `write-region'.
5455 It does not apply to sending output to subprocesses, however.
5457 If this is nil, the buffer is saved without any code conversion
5458 unless some coding system is specified in `file-coding-system-alist'
5459 for the buffer file.
5461 If the text to be saved cannot be encoded as specified by this variable,
5462 an alternative encoding is selected by `select-safe-coding-system', which see.
5464 The variable `coding-system-for-write', if non-nil, overrides this variable.
5466 This variable is never applied to a way of decoding a file while reading it. */);
5468 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5470 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5472 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5473 doc
: /* *Non-nil means do not display continuation lines.
5474 Instead, give each line of text just one screen line.
5476 Note that this is overridden by the variable
5477 `truncate-partial-width-windows' if that variable is non-nil
5478 and this buffer is not full-frame width. */);
5481 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5483 doc
: /* Non-nil if the visited file is a binary file.
5484 This variable is meaningful on MS-DOG and Windows NT.
5485 On those systems, it is automatically local in every buffer.
5486 On other systems, this variable is normally always nil. */);
5489 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5490 make_number (Lisp_String
),
5491 doc
: /* Name of default directory of current buffer. Should end with slash.
5492 To interactively change the default directory, use command `cd'. */);
5494 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5496 doc
: /* Function called (if non-nil) to perform auto-fill.
5497 It is called after self-inserting any character specified in
5498 the `auto-fill-chars' table.
5499 NOTE: This variable is not a hook;
5500 its value may not be a list of functions. */);
5502 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5503 make_number (Lisp_String
),
5504 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5506 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5507 make_number (Lisp_String
),
5508 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5509 The truename of a file is calculated by `file-truename'
5510 and then abbreviated with `abbreviate-file-name'. */);
5512 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5513 ¤t_buffer
->auto_save_file_name
,
5514 make_number (Lisp_String
),
5515 doc
: /* Name of file for auto-saving current buffer.
5516 If it is nil, that means don't auto-save this buffer. */);
5518 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5519 doc
: /* Non-nil if this buffer is read-only. */);
5521 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5522 doc
: /* Non-nil if this buffer's file has been backed up.
5523 Backing up is done before the first time the file is saved. */);
5525 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5526 make_number (Lisp_Int
),
5527 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5530 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5532 doc
: /* Non-nil enables selective display.
5533 An Integer N as value means display only lines
5534 that start with less than n columns of space.
5535 A value of t means that the character ^M makes itself and
5536 all the rest of the line invisible; also, when saving the buffer
5537 in a file, save the ^M as a newline. */);
5540 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5541 ¤t_buffer
->selective_display_ellipses
,
5543 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5546 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5547 doc
: /* Non-nil if self-insertion should replace existing text.
5548 The value should be one of `overwrite-mode-textual',
5549 `overwrite-mode-binary', or nil.
5550 If it is `overwrite-mode-textual', self-insertion still
5551 inserts at the end of a line, and inserts when point is before a tab,
5552 until the tab is filled in.
5553 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5555 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5557 doc
: /* Display table that controls display of the contents of current buffer.
5559 If this variable is nil, the value of `standard-display-table' is used.
5560 Each window can have its own, overriding display table, see
5561 `set-window-display-table' and `window-display-table'.
5563 The display table is a char-table created with `make-display-table'.
5564 A char-table is an array indexed by character codes. Normal array
5565 primitives `aref' and `aset' can be used to access elements of a char-table.
5567 Each of the char-table elements control how to display the corresponding
5568 text character: the element at index C in the table says how to display
5569 the character whose code is C. Each element should be a vector of
5570 characters or nil. nil means display the character in the default fashion;
5571 otherwise, the characters from the vector are delivered to the screen
5572 instead of the original character.
5574 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5575 a capital Y instead of each X character.
5577 In addition, a char-table has six extra slots to control the display of:
5579 the end of a truncated screen line (extra-slot 0, a single character);
5580 the end of a continued line (extra-slot 1, a single character);
5581 the escape character used to display character codes in octal
5582 (extra-slot 2, a single character);
5583 the character used as an arrow for control characters (extra-slot 3,
5584 a single character);
5585 the decoration indicating the presence of invisible lines (extra-slot 4,
5586 a vector of characters);
5587 the character used to draw the border between side-by-side windows
5588 (extra-slot 5, a single character).
5590 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5592 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5594 doc
: /* *Width of left marginal area for display of a buffer.
5595 A value of nil means no marginal area. */);
5597 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5599 doc
: /* *Width of right marginal area for display of a buffer.
5600 A value of nil means no marginal area. */);
5602 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5604 doc
: /* *Width of this buffer's left fringe (in pixels).
5605 A value of 0 means no left fringe is shown in this buffer's window.
5606 A value of nil means to use the left fringe width from the window's frame. */);
5608 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5610 doc
: /* *Width of this buffer's right fringe (in pixels).
5611 A value of 0 means no right fringe is shown in this buffer's window.
5612 A value of nil means to use the right fringe width from the window's frame. */);
5614 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5616 doc
: /* *Non-nil means to display fringes outside display margins.
5617 A value of nil means to display fringes between margins and buffer text. */);
5619 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5621 doc
: /* *Width of this buffer's scroll bars in pixels.
5622 A value of nil means to use the scroll bar width from the window's frame. */);
5624 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5626 doc
: /* *Position of this buffer's vertical scroll bar.
5627 A value of left or right means to place the vertical scroll bar at that side
5628 of the window; a value of nil means that this window has no vertical scroll bar.
5629 A value of t means to use the vertical scroll bar type from the window's frame. */);
5631 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5632 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5633 doc
: /* *Visually indicate empty lines after the buffer end.
5634 If non-nil, a bitmap is displayed in the left fringe of a window on
5635 window-systems. */);
5637 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5638 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
5639 doc
: /* *Visually indicate buffer boundaries and scrolling.
5640 If non-nil, the first and last line of the buffer are marked in the left and
5641 right fringe of a window on window-systems.
5642 In addition, if value is t, the top and bottom line of the window are marked
5643 with up and down arrow bitmaps in the right fringe if window can be scrolled. */);
5645 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5646 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5647 doc
: /* How far to scroll windows upward.
5648 If you move point off the bottom, the window scrolls automatically.
5649 This variable controls how far it scrolls. nil, the default,
5650 means scroll to center point. A fraction means scroll to put point
5651 that fraction of the window's height from the bottom of the window.
5652 When the value is 0.0, point goes at the bottom line, which in the simple
5653 case that you moved off with C-f means scrolling just one line. 1.0 means
5654 point goes at the top, so that in that simple case, the window
5655 window scrolls by a full window height. Meaningful values are
5656 between 0.0 and 1.0, inclusive. */);
5658 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5659 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5660 doc
: /* How far to scroll windows downward.
5661 If you move point off the top, the window scrolls automatically.
5662 This variable controls how far it scrolls. nil, the default,
5663 means scroll to center point. A fraction means scroll to put point
5664 that fraction of the window's height from the top of the window.
5665 When the value is 0.0, point goes at the top line, which in the simple
5666 case that you moved off with C-b means scrolling just one line. 1.0 means
5667 point goes at the bottom, so that in that simple case, the window
5668 window scrolls by a full window height. Meaningful values are
5669 between 0.0 and 1.0, inclusive. */);
5671 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5675 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5676 doc
: /* List of functions to call before each text change.
5677 Two arguments are passed to each function: the positions of
5678 the beginning and end of the range of old text to be changed.
5679 \(For an insertion, the beginning and end are at the same place.)
5680 No information is given about the length of the text after the change.
5682 Buffer changes made while executing the `before-change-functions'
5683 don't call any before-change or after-change functions.
5684 That's because these variables are temporarily set to nil.
5685 As a result, a hook function cannot straightforwardly alter the value of
5686 these variables. See the Emacs Lisp manual for a way of
5687 accomplishing an equivalent result by using other variables.
5689 If an unhandled error happens in running these functions,
5690 the variable's value remains nil. That prevents the error
5691 from happening repeatedly and making Emacs nonfunctional. */);
5692 Vbefore_change_functions
= Qnil
;
5694 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5695 doc
: /* List of functions to call after each text change.
5696 Three arguments are passed to each function: the positions of
5697 the beginning and end of the range of changed text,
5698 and the length in bytes of the pre-change text replaced by that range.
5699 \(For an insertion, the pre-change length is zero;
5700 for a deletion, that length is the number of bytes deleted,
5701 and the post-change beginning and end are at the same place.)
5703 Buffer changes made while executing the `after-change-functions'
5704 don't call any before-change or after-change functions.
5705 That's because these variables are temporarily set to nil.
5706 As a result, a hook function cannot straightforwardly alter the value of
5707 these variables. See the Emacs Lisp manual for a way of
5708 accomplishing an equivalent result by using other variables.
5710 If an unhandled error happens in running these functions,
5711 the variable's value remains nil. That prevents the error
5712 from happening repeatedly and making Emacs nonfunctional. */);
5713 Vafter_change_functions
= Qnil
;
5715 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5716 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5717 The functions are run using the `run-hooks' function. */);
5718 Vfirst_change_hook
= Qnil
;
5720 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5721 doc
: /* List of undo entries in current buffer.
5722 Recent changes come first; older changes follow newer.
5724 An entry (BEG . END) represents an insertion which begins at
5725 position BEG and ends at position END.
5727 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5728 from (abs POSITION). If POSITION is positive, point was at the front
5729 of the text being deleted; if negative, point was at the end.
5731 An entry (t HIGH . LOW) indicates that the buffer previously had
5732 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5733 of the visited file's modification time, as of that time. If the
5734 modification time of the most recent save is different, this entry is
5737 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5738 was modified between BEG and END. PROPERTY is the property name,
5739 and VALUE is the old value.
5741 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5742 was adjusted in position by the offset DISTANCE (an integer).
5744 An entry of the form POSITION indicates that point was at the buffer
5745 location given by the integer. Undoing an entry of this form places
5748 nil marks undo boundaries. The undo command treats the changes
5749 between two undo boundaries as a single step to be undone.
5751 If the value of the variable is t, undo information is not recorded. */);
5753 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5754 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5756 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5757 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5759 Normally, the line-motion functions work by scanning the buffer for
5760 newlines. Columnar operations (like move-to-column and
5761 compute-motion) also work by scanning the buffer, summing character
5762 widths as they go. This works well for ordinary text, but if the
5763 buffer's lines are very long (say, more than 500 characters), these
5764 motion functions will take longer to execute. Emacs may also take
5765 longer to update the display.
5767 If cache-long-line-scans is non-nil, these motion functions cache the
5768 results of their scans, and consult the cache to avoid rescanning
5769 regions of the buffer until the text is modified. The caches are most
5770 beneficial when they prevent the most searching---that is, when the
5771 buffer contains long lines and large regions of characters with the
5772 same, fixed screen width.
5774 When cache-long-line-scans is non-nil, processing short lines will
5775 become slightly slower (because of the overhead of consulting the
5776 cache), and the caches will use memory roughly proportional to the
5777 number of newlines and characters whose screen width varies.
5779 The caches require no explicit maintenance; their accuracy is
5780 maintained internally by the Emacs primitives. Enabling or disabling
5781 the cache should not affect the behavior of any of the motion
5782 functions; it should only affect their performance. */);
5784 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5785 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5787 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5788 doc
: /* List of formats to use when saving this buffer.
5789 Formats are defined by `format-alist'. This variable is
5790 set when a file is visited. */);
5792 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5793 ¤t_buffer
->invisibility_spec
, Qnil
,
5794 doc
: /* Invisibility spec of this buffer.
5795 The default is t, which means that text is invisible
5796 if it has a non-nil `invisible' property.
5797 If the value is a list, a text character is invisible if its `invisible'
5798 property is an element in that list.
5799 If an element is a cons cell of the form (PROP . ELLIPSIS),
5800 then characters with property value PROP are invisible,
5801 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5803 DEFVAR_PER_BUFFER ("buffer-display-count",
5804 ¤t_buffer
->display_count
, Qnil
,
5805 doc
: /* A number incremented each time this buffer is displayed in a window.
5806 The function `set-window-buffer' increments it. */);
5808 DEFVAR_PER_BUFFER ("buffer-display-time",
5809 ¤t_buffer
->display_time
, Qnil
,
5810 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5811 The function `set-window-buffer' updates this variable
5812 to the value obtained by calling `current-time'.
5813 If the buffer has never been shown in a window, the value is nil. */);
5815 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5816 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5817 Non-nil also enables highlighting of the region whenever the mark is active.
5818 The variable `highlight-nonselected-windows' controls whether to highlight
5819 all windows or just the selected window. */);
5820 Vtransient_mark_mode
= Qnil
;
5822 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5823 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5824 If the value is t, disregard `buffer-read-only' and all `read-only'
5825 text properties. If the value is a list, disregard `buffer-read-only'
5826 and disregard a `read-only' text property if the property value
5827 is a member of the list. */);
5828 Vinhibit_read_only
= Qnil
;
5830 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5831 doc
: /* Cursor to use when this buffer is in the selected window.
5832 Values are interpreted as follows:
5834 t use the cursor specified for the frame
5835 nil don't display a cursor
5836 bar display a bar cursor with default width
5837 (bar . WIDTH) display a bar cursor with width WIDTH
5838 ANYTHING ELSE display a box cursor.
5840 When the buffer is displayed in a nonselected window,
5841 this variable has no effect; the cursor appears as a hollow box. */);
5843 DEFVAR_PER_BUFFER ("line-spacing",
5844 ¤t_buffer
->extra_line_spacing
, Qnil
,
5845 doc
: /* Additional space to put between lines when displaying a buffer.
5846 The space is measured in pixels, and put below lines on window systems. */);
5848 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5849 doc
: /* List of functions called with no args to query before killing a buffer. */);
5850 Vkill_buffer_query_functions
= Qnil
;
5852 defsubr (&Sbuffer_live_p
);
5853 defsubr (&Sbuffer_list
);
5854 defsubr (&Sget_buffer
);
5855 defsubr (&Sget_file_buffer
);
5856 defsubr (&Sget_buffer_create
);
5857 defsubr (&Smake_indirect_buffer
);
5858 defsubr (&Sgenerate_new_buffer_name
);
5859 defsubr (&Sbuffer_name
);
5860 /*defsubr (&Sbuffer_number);*/
5861 defsubr (&Sbuffer_file_name
);
5862 defsubr (&Sbuffer_base_buffer
);
5863 defsubr (&Sbuffer_local_value
);
5864 defsubr (&Sbuffer_local_variables
);
5865 defsubr (&Sbuffer_modified_p
);
5866 defsubr (&Sset_buffer_modified_p
);
5867 defsubr (&Sbuffer_modified_tick
);
5868 defsubr (&Srename_buffer
);
5869 defsubr (&Sother_buffer
);
5870 defsubr (&Sbuffer_disable_undo
);
5871 defsubr (&Sbuffer_enable_undo
);
5872 defsubr (&Skill_buffer
);
5873 defsubr (&Sset_buffer_major_mode
);
5874 defsubr (&Sswitch_to_buffer
);
5875 defsubr (&Spop_to_buffer
);
5876 defsubr (&Scurrent_buffer
);
5877 defsubr (&Sset_buffer
);
5878 defsubr (&Sbarf_if_buffer_read_only
);
5879 defsubr (&Sbury_buffer
);
5880 defsubr (&Serase_buffer
);
5881 defsubr (&Sset_buffer_multibyte
);
5882 defsubr (&Skill_all_local_variables
);
5884 defsubr (&Soverlayp
);
5885 defsubr (&Smake_overlay
);
5886 defsubr (&Sdelete_overlay
);
5887 defsubr (&Smove_overlay
);
5888 defsubr (&Soverlay_start
);
5889 defsubr (&Soverlay_end
);
5890 defsubr (&Soverlay_buffer
);
5891 defsubr (&Soverlay_properties
);
5892 defsubr (&Soverlays_at
);
5893 defsubr (&Soverlays_in
);
5894 defsubr (&Snext_overlay_change
);
5895 defsubr (&Sprevious_overlay_change
);
5896 defsubr (&Soverlay_recenter
);
5897 defsubr (&Soverlay_lists
);
5898 defsubr (&Soverlay_get
);
5899 defsubr (&Soverlay_put
);
5900 defsubr (&Srestore_buffer_modified_p
);
5906 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
5907 initial_define_key (control_x_map
, 'k', "kill-buffer");
5909 /* This must not be in syms_of_buffer, because Qdisabled is not
5910 initialized when that function gets called. */
5911 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
5914 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
5915 (do not change this comment) */