1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994,
3 1995, 1997, 1998, 1999, 2000, 2001, 2002,
4 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
25 #include <sys/types.h>
27 #include <sys/param.h>
41 #include "intervals.h"
46 #include "region-cache.h"
48 #include "blockinput.h"
53 struct buffer
*current_buffer
; /* the current buffer */
55 /* First buffer in chain of all buffers (in reverse order of creation).
56 Threaded through ->next. */
58 struct buffer
*all_buffers
;
60 /* This structure holds the default values of the buffer-local variables
61 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
62 The default value occupies the same slot in this structure
63 as an individual buffer's value occupies in that buffer.
64 Setting the default value also goes through the alist of buffers
65 and stores into each buffer that does not say it has a local value. */
67 DECL_ALIGN (struct buffer
, buffer_defaults
);
69 /* A Lisp_Object pointer to the above, used for staticpro */
71 static Lisp_Object Vbuffer_defaults
;
73 /* This structure marks which slots in a buffer have corresponding
74 default values in buffer_defaults.
75 Each such slot has a nonzero value in this structure.
76 The value has only one nonzero bit.
78 When a buffer has its own local value for a slot,
79 the entry for that slot (found in the same slot in this structure)
80 is turned on in the buffer's local_flags array.
82 If a slot in this structure is -1, then even though there may
83 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
84 and the corresponding slot in buffer_defaults is not used.
86 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
87 but there is a default value which is copied into each buffer.
89 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
90 zero, that is a bug */
92 struct buffer buffer_local_flags
;
94 /* This structure holds the names of symbols whose values may be
95 buffer-local. It is indexed and accessed in the same way as the above. */
97 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
99 /* A Lisp_Object pointer to the above, used for staticpro */
100 static Lisp_Object Vbuffer_local_symbols
;
102 /* This structure holds the required types for the values in the
103 buffer-local slots. If a slot contains Qnil, then the
104 corresponding buffer slot may contain a value of any type. If a
105 slot contains an integer, then prospective values' tags must be
106 equal to that integer (except nil is always allowed).
107 When a tag does not match, the function
108 buffer_slot_type_mismatch will signal an error.
110 If a slot here contains -1, the corresponding variable is read-only. */
111 struct buffer buffer_local_types
;
113 /* Flags indicating which built-in buffer-local variables
114 are permanent locals. */
115 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
117 /* Number of per-buffer variables used. */
119 int last_per_buffer_idx
;
121 Lisp_Object
Fset_buffer ();
122 void set_buffer_internal ();
123 void set_buffer_internal_1 ();
124 static void call_overlay_mod_hooks ();
125 static void swap_out_buffer_local_variables ();
126 static void reset_buffer_local_variables ();
128 /* Alist of all buffer names vs the buffers. */
129 /* This used to be a variable, but is no longer,
130 to prevent lossage due to user rplac'ing this alist or its elements. */
131 Lisp_Object Vbuffer_alist
;
133 /* Functions to call before and after each text change. */
134 Lisp_Object Vbefore_change_functions
;
135 Lisp_Object Vafter_change_functions
;
137 Lisp_Object Vtransient_mark_mode
;
139 /* t means ignore all read-only text properties.
140 A list means ignore such a property if its value is a member of the list.
141 Any non-nil value means ignore buffer-read-only. */
142 Lisp_Object Vinhibit_read_only
;
144 /* List of functions to call that can query about killing a buffer.
145 If any of these functions returns nil, we don't kill it. */
146 Lisp_Object Vkill_buffer_query_functions
;
147 Lisp_Object Qkill_buffer_query_functions
;
149 /* List of functions to call before changing an unmodified buffer. */
150 Lisp_Object Vfirst_change_hook
;
152 Lisp_Object Qfirst_change_hook
;
153 Lisp_Object Qbefore_change_functions
;
154 Lisp_Object Qafter_change_functions
;
155 Lisp_Object Qucs_set_table_for_input
;
157 /* If nonzero, all modification hooks are suppressed. */
158 int inhibit_modification_hooks
;
160 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
162 Lisp_Object Qprotected_field
;
164 Lisp_Object QSFundamental
; /* A string "Fundamental" */
166 Lisp_Object Qkill_buffer_hook
;
168 Lisp_Object Qget_file_buffer
;
170 Lisp_Object Qoverlayp
;
172 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
174 Lisp_Object Qmodification_hooks
;
175 Lisp_Object Qinsert_in_front_hooks
;
176 Lisp_Object Qinsert_behind_hooks
;
178 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
179 static void free_buffer_text
P_ ((struct buffer
*b
));
180 static struct Lisp_Overlay
* copy_overlays
P_ ((struct buffer
*, struct Lisp_Overlay
*));
181 static void modify_overlay
P_ ((struct buffer
*, EMACS_INT
, EMACS_INT
));
182 static Lisp_Object buffer_lisp_local_variables
P_ ((struct buffer
*));
185 /* For debugging; temporary. See set_buffer_internal. */
186 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
193 error ("No buffer named %s", SDATA (spec
));
194 error ("Invalid buffer argument");
197 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
198 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
199 Value is nil if OBJECT is not a buffer or if it has been killed. */)
203 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
207 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
208 doc
: /* Return a list of all existing live buffers.
209 If the optional arg FRAME is a frame, we return the buffer list
210 in the proper order for that frame: the buffers in FRAME's `buffer-list'
211 frame parameter come first, followed by the rest of the buffers. */)
216 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
220 Lisp_Object framelist
, prevlist
, tail
;
225 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
226 prevlist
= Fnreverse (Fcopy_sequence (XFRAME (frame
)->buried_buffer_list
));
228 /* Remove from GENERAL any buffer that duplicates one in
229 FRAMELIST or PREVLIST. */
233 general
= Fdelq (XCAR (tail
), general
);
239 general
= Fdelq (XCAR (tail
), general
);
246 return Fnconc (3, args
);
252 /* Like Fassoc, but use Fstring_equal to compare
253 (which ignores text properties),
254 and don't ever QUIT. */
257 assoc_ignore_text_properties (key
, list
)
258 register Lisp_Object key
;
261 register Lisp_Object tail
;
262 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
264 register Lisp_Object elt
, tem
;
266 tem
= Fstring_equal (Fcar (elt
), key
);
273 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
274 doc
: /* Return the buffer named NAME (a string).
275 If there is no live buffer named NAME, return nil.
276 NAME may also be a buffer; if so, the value is that buffer. */)
278 register Lisp_Object name
;
284 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
287 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
288 doc
: /* Return the buffer visiting file FILENAME (a string).
289 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
290 If there is no such live buffer, return nil.
291 See also `find-buffer-visiting'. */)
293 register Lisp_Object filename
;
295 register Lisp_Object tail
, buf
, tem
;
298 CHECK_STRING (filename
);
299 filename
= Fexpand_file_name (filename
, Qnil
);
301 /* If the file name has special constructs in it,
302 call the corresponding file handler. */
303 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
305 return call2 (handler
, Qget_file_buffer
, filename
);
307 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
309 buf
= Fcdr (XCAR (tail
));
310 if (!BUFFERP (buf
)) continue;
311 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
312 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
320 get_truename_buffer (filename
)
321 register Lisp_Object filename
;
323 register Lisp_Object tail
, buf
, tem
;
325 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
327 buf
= Fcdr (XCAR (tail
));
328 if (!BUFFERP (buf
)) continue;
329 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
330 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
337 /* Incremented for each buffer created, to assign the buffer number. */
340 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
341 doc
: /* Return the buffer named NAME, or create such a buffer and return it.
342 A new buffer is created if there is no live buffer named NAME.
343 If NAME starts with a space, the new buffer does not keep undo information.
344 If NAME is a buffer instead of a string, then it is the value returned.
345 The value is never nil. */)
347 register Lisp_Object name
;
349 register Lisp_Object buf
;
350 register struct buffer
*b
;
352 buf
= Fget_buffer (name
);
356 if (SCHARS (name
) == 0)
357 error ("Empty string for buffer name is not allowed");
359 b
= (struct buffer
*) allocate_buffer ();
361 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
363 /* An ordinary buffer uses its own struct buffer_text. */
364 b
->text
= &b
->own_text
;
367 BUF_GAP_SIZE (b
) = 20;
369 /* We allocate extra 1-byte at the tail and keep it always '\0' for
370 anchoring a search. */
371 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
373 if (! BUF_BEG_ADDR (b
))
374 buffer_memory_full ();
381 BUF_PT_BYTE (b
) = BEG_BYTE
;
382 BUF_GPT_BYTE (b
) = BEG_BYTE
;
383 BUF_BEGV_BYTE (b
) = BEG_BYTE
;
384 BUF_ZV_BYTE (b
) = BEG_BYTE
;
385 BUF_Z_BYTE (b
) = BEG_BYTE
;
387 BUF_OVERLAY_MODIFF (b
) = 1;
388 BUF_SAVE_MODIFF (b
) = 1;
389 BUF_INTERVALS (b
) = 0;
390 BUF_UNCHANGED_MODIFIED (b
) = 1;
391 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
392 BUF_END_UNCHANGED (b
) = 0;
393 BUF_BEG_UNCHANGED (b
) = 0;
394 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
396 b
->newline_cache
= 0;
397 b
->width_run_cache
= 0;
398 b
->width_table
= Qnil
;
399 b
->prevent_redisplay_optimizations_p
= 1;
401 /* Put this on the chain of all buffers including killed ones. */
402 b
->next
= all_buffers
;
405 /* An ordinary buffer normally doesn't need markers
406 to handle BEGV and ZV. */
408 b
->begv_marker
= Qnil
;
411 name
= Fcopy_sequence (name
);
412 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
415 if (SREF (name
, 0) != ' ')
421 reset_buffer_local_variables (b
, 1);
423 b
->mark
= Fmake_marker ();
424 BUF_MARKERS (b
) = NULL
;
427 /* Put this in the alist of all live buffers. */
429 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
431 /* An error in calling the function here (should someone redfine it)
432 can lead to infinite regress until you run out of stack. rms
433 says that's not worth protecting against. */
434 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
435 /* buf is on buffer-alist, so no gcpro. */
436 call1 (Qucs_set_table_for_input
, buf
);
442 /* Return a list of overlays which is a copy of the overlay list
443 LIST, but for buffer B. */
445 static struct Lisp_Overlay
*
446 copy_overlays (b
, list
)
448 struct Lisp_Overlay
*list
;
451 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
453 XSETBUFFER (buffer
, b
);
455 for (; list
; list
= list
->next
)
457 Lisp_Object overlay
, start
, end
, old_overlay
;
460 XSETMISC (old_overlay
, list
);
461 charpos
= marker_position (OVERLAY_START (old_overlay
));
462 start
= Fmake_marker ();
463 Fset_marker (start
, make_number (charpos
), buffer
);
464 XMARKER (start
)->insertion_type
465 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
467 charpos
= marker_position (OVERLAY_END (old_overlay
));
468 end
= Fmake_marker ();
469 Fset_marker (end
, make_number (charpos
), buffer
);
470 XMARKER (end
)->insertion_type
471 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
473 overlay
= allocate_misc ();
474 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
475 OVERLAY_START (overlay
) = start
;
476 OVERLAY_END (overlay
) = end
;
477 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
478 XOVERLAY (overlay
)->next
= NULL
;
481 tail
= tail
->next
= XOVERLAY (overlay
);
483 result
= tail
= XOVERLAY (overlay
);
490 /* Clone per-buffer values of buffer FROM.
492 Buffer TO gets the same per-buffer values as FROM, with the
493 following exceptions: (1) TO's name is left untouched, (2) markers
494 are copied and made to refer to TO, and (3) overlay lists are
498 clone_per_buffer_values (from
, to
)
499 struct buffer
*from
, *to
;
501 Lisp_Object to_buffer
;
504 XSETBUFFER (to_buffer
, to
);
506 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
508 offset
+= sizeof (Lisp_Object
))
512 obj
= PER_BUFFER_VALUE (from
, offset
);
515 struct Lisp_Marker
*m
= XMARKER (obj
);
516 obj
= Fmake_marker ();
517 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
518 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
521 PER_BUFFER_VALUE (to
, offset
) = obj
;
524 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
526 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
527 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
529 /* Get (a copy of) the alist of Lisp-level local variables of FROM
530 and install that in TO. */
531 to
->local_var_alist
= buffer_lisp_local_variables (from
);
534 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
536 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
537 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
538 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
539 NAME should be a string which is not the name of an existing buffer.
540 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
541 such as major and minor modes, in the indirect buffer.
542 CLONE nil means the indirect buffer's state is reset to default values. */)
543 (base_buffer
, name
, clone
)
544 Lisp_Object base_buffer
, name
, clone
;
546 Lisp_Object buf
, tem
;
550 buf
= Fget_buffer (name
);
552 error ("Buffer name `%s' is in use", SDATA (name
));
555 base_buffer
= Fget_buffer (base_buffer
);
556 if (NILP (base_buffer
))
557 error ("No such buffer: `%s'", SDATA (tem
));
558 if (NILP (XBUFFER (base_buffer
)->name
))
559 error ("Base buffer has been killed");
561 if (SCHARS (name
) == 0)
562 error ("Empty string for buffer name is not allowed");
564 b
= (struct buffer
*) allocate_buffer ();
565 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
567 if (XBUFFER (base_buffer
)->base_buffer
)
568 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
570 b
->base_buffer
= XBUFFER (base_buffer
);
572 /* Use the base buffer's text object. */
573 b
->text
= b
->base_buffer
->text
;
575 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
576 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
577 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
578 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
579 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
580 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
582 b
->newline_cache
= 0;
583 b
->width_run_cache
= 0;
584 b
->width_table
= Qnil
;
586 /* Put this on the chain of all buffers including killed ones. */
587 b
->next
= all_buffers
;
590 name
= Fcopy_sequence (name
);
591 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
595 reset_buffer_local_variables (b
, 1);
597 /* Put this in the alist of all live buffers. */
599 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
601 b
->mark
= Fmake_marker ();
604 /* The multibyte status belongs to the base buffer. */
605 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
607 /* Make sure the base buffer has markers for its narrowing. */
608 if (NILP (b
->base_buffer
->pt_marker
))
610 b
->base_buffer
->pt_marker
= Fmake_marker ();
611 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
612 BUF_PT (b
->base_buffer
),
613 BUF_PT_BYTE (b
->base_buffer
));
615 if (NILP (b
->base_buffer
->begv_marker
))
617 b
->base_buffer
->begv_marker
= Fmake_marker ();
618 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
619 BUF_BEGV (b
->base_buffer
),
620 BUF_BEGV_BYTE (b
->base_buffer
));
622 if (NILP (b
->base_buffer
->zv_marker
))
624 b
->base_buffer
->zv_marker
= Fmake_marker ();
625 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
626 BUF_ZV (b
->base_buffer
),
627 BUF_ZV_BYTE (b
->base_buffer
));
628 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
633 /* Give the indirect buffer markers for its narrowing. */
634 b
->pt_marker
= Fmake_marker ();
635 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
636 b
->begv_marker
= Fmake_marker ();
637 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
638 b
->zv_marker
= Fmake_marker ();
639 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
640 XMARKER (b
->zv_marker
)->insertion_type
= 1;
644 struct buffer
*old_b
= current_buffer
;
646 clone_per_buffer_values (b
->base_buffer
, b
);
648 b
->file_truename
= Qnil
;
649 b
->display_count
= make_number (0);
651 b
->auto_save_file_name
= Qnil
;
652 set_buffer_internal_1 (b
);
653 Fset (intern ("buffer-save-without-query"), Qnil
);
654 Fset (intern ("buffer-file-number"), Qnil
);
655 Fset (intern ("buffer-stale-function"), Qnil
);
656 set_buffer_internal_1 (old_b
);
663 delete_all_overlays (b
)
668 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
669 have to empty the list, otherwise we end up with overlays that
670 think they belong to this buffer while the buffer doesn't know about
672 while (b
->overlays_before
)
674 XSETMISC (overlay
, b
->overlays_before
);
675 Fdelete_overlay (overlay
);
677 while (b
->overlays_after
)
679 XSETMISC (overlay
, b
->overlays_after
);
680 Fdelete_overlay (overlay
);
682 eassert (b
->overlays_before
== NULL
);
683 eassert (b
->overlays_after
== NULL
);
686 /* Reinitialize everything about a buffer except its name and contents
688 If called on an already-initialized buffer, the list of overlays
689 should be deleted before calling this function, otherwise we end up
690 with overlays that claim to belong to the buffer but the buffer
691 claims it doesn't belong to it. */
695 register struct buffer
*b
;
698 b
->file_truename
= Qnil
;
699 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
701 XSETFASTINT (b
->save_length
, 0);
702 b
->last_window_start
= 1;
703 /* It is more conservative to start out "changed" than "unchanged". */
705 b
->prevent_redisplay_optimizations_p
= 1;
707 b
->auto_save_modified
= 0;
708 b
->auto_save_failure_time
= -1;
709 b
->auto_save_file_name
= Qnil
;
711 b
->overlays_before
= NULL
;
712 b
->overlays_after
= NULL
;
713 b
->overlay_center
= BEG
;
714 b
->mark_active
= Qnil
;
715 b
->point_before_scroll
= Qnil
;
716 b
->file_format
= Qnil
;
717 b
->auto_save_file_format
= Qt
;
718 b
->last_selected_window
= Qnil
;
719 XSETINT (b
->display_count
, 0);
720 b
->display_time
= Qnil
;
721 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
722 b
->cursor_type
= buffer_defaults
.cursor_type
;
723 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
725 b
->display_error_modiff
= 0;
728 /* Reset buffer B's local variables info.
729 Don't use this on a buffer that has already been in use;
730 it does not treat permanent locals consistently.
731 Instead, use Fkill_all_local_variables.
733 If PERMANENT_TOO is 1, then we reset permanent built-in
734 buffer-local variables. If PERMANENT_TOO is 0,
735 we preserve those. */
738 reset_buffer_local_variables (b
, permanent_too
)
739 register struct buffer
*b
;
745 /* Reset the major mode to Fundamental, together with all the
746 things that depend on the major mode.
747 default-major-mode is handled at a higher level.
748 We ignore it here. */
749 b
->major_mode
= Qfundamental_mode
;
751 b
->mode_name
= QSFundamental
;
752 b
->minor_modes
= Qnil
;
754 /* If the standard case table has been altered and invalidated,
755 fix up its insides first. */
756 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
757 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
758 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
759 Fset_standard_case_table (Vascii_downcase_table
);
761 b
->downcase_table
= Vascii_downcase_table
;
762 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
763 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
764 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
765 b
->invisibility_spec
= Qt
;
767 b
->buffer_file_type
= Qnil
;
770 /* Reset all (or most) per-buffer variables to their defaults. */
771 b
->local_var_alist
= Qnil
;
772 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
773 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
774 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
776 /* For each slot that has a default value,
777 copy that into the slot. */
779 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
781 offset
+= sizeof (Lisp_Object
))
783 int idx
= PER_BUFFER_IDX (offset
);
786 || buffer_permanent_local_flags
[idx
] == 0))
787 /* Is -2 used anywhere? */
789 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
793 /* We split this away from generate-new-buffer, because rename-buffer
794 and set-visited-file-name ought to be able to use this to really
795 rename the buffer properly. */
797 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
799 doc
: /* Return a string that is the name of no existing buffer based on NAME.
800 If there is no live buffer named NAME, then return NAME.
801 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
802 \(starting at 2) until an unused name is found, and then return that name.
803 Optional second argument IGNORE specifies a name that is okay to use
804 \(if it is in the sequence to be tried)
805 even if a buffer with that name exists. */)
807 register Lisp_Object name
, ignore
;
809 register Lisp_Object gentemp
, tem
;
815 tem
= Fstring_equal (name
, ignore
);
818 tem
= Fget_buffer (name
);
825 sprintf (number
, "<%d>", ++count
);
826 gentemp
= concat2 (name
, build_string (number
));
827 tem
= Fstring_equal (gentemp
, ignore
);
830 tem
= Fget_buffer (gentemp
);
837 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
838 doc
: /* Return the name of BUFFER, as a string.
839 With no argument or nil as argument, return the name of the current buffer. */)
841 register Lisp_Object buffer
;
844 return current_buffer
->name
;
845 CHECK_BUFFER (buffer
);
846 return XBUFFER (buffer
)->name
;
849 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
850 doc
: /* Return name of file BUFFER is visiting, or nil if none.
851 No argument or nil as argument means use the current buffer. */)
853 register Lisp_Object buffer
;
856 return current_buffer
->filename
;
857 CHECK_BUFFER (buffer
);
858 return XBUFFER (buffer
)->filename
;
861 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
863 doc
: /* Return the base buffer of indirect buffer BUFFER.
864 If BUFFER is not indirect, return nil.
865 BUFFER defaults to the current buffer. */)
867 register Lisp_Object buffer
;
870 Lisp_Object base_buffer
;
873 base
= current_buffer
->base_buffer
;
876 CHECK_BUFFER (buffer
);
877 base
= XBUFFER (buffer
)->base_buffer
;
882 XSETBUFFER (base_buffer
, base
);
886 DEFUN ("buffer-local-value", Fbuffer_local_value
,
887 Sbuffer_local_value
, 2, 2, 0,
888 doc
: /* Return the value of VARIABLE in BUFFER.
889 If VARIABLE does not have a buffer-local binding in BUFFER, the value
890 is the default binding of the variable. */)
892 register Lisp_Object variable
;
893 register Lisp_Object buffer
;
895 register struct buffer
*buf
;
896 register Lisp_Object result
;
898 CHECK_SYMBOL (variable
);
899 CHECK_BUFFER (buffer
);
900 buf
= XBUFFER (buffer
);
902 if (SYMBOLP (variable
))
903 variable
= indirect_variable (variable
);
905 /* Look in local_var_list */
906 result
= Fassoc (variable
, buf
->local_var_alist
);
912 /* Look in special slots */
913 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
914 offset
< sizeof (struct buffer
);
915 /* sizeof EMACS_INT == sizeof Lisp_Object */
916 offset
+= (sizeof (EMACS_INT
)))
918 idx
= PER_BUFFER_IDX (offset
);
919 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
920 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
921 && EQ (PER_BUFFER_SYMBOL (offset
), variable
))
923 result
= PER_BUFFER_VALUE (buf
, offset
);
930 result
= Fdefault_value (variable
);
934 Lisp_Object valcontents
;
935 Lisp_Object current_alist_element
;
937 /* What binding is loaded right now? */
938 valcontents
= SYMBOL_VALUE (variable
);
939 current_alist_element
940 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
942 /* The value of the currently loaded binding is not
943 stored in it, but rather in the realvalue slot.
944 Store that value into the binding it belongs to
945 in case that is the one we are about to use. */
947 Fsetcdr (current_alist_element
,
948 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
950 /* Now get the (perhaps updated) value out of the binding. */
951 result
= XCDR (result
);
954 if (EQ (result
, Qunbound
))
955 return Fsignal (Qvoid_variable
, Fcons (variable
, Qnil
));
960 /* Return an alist of the Lisp-level buffer-local bindings of
961 buffer BUF. That is, don't include the variables maintained
962 in special slots in the buffer object. */
965 buffer_lisp_local_variables (buf
)
968 Lisp_Object result
= Qnil
;
969 register Lisp_Object tail
;
970 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
972 Lisp_Object val
, elt
;
976 /* Reference each variable in the alist in buf.
977 If inquiring about the current buffer, this gets the current values,
978 so store them into the alist so the alist is up to date.
979 If inquiring about some other buffer, this swaps out any values
980 for that buffer, making the alist up to date automatically. */
981 val
= find_symbol_value (XCAR (elt
));
982 /* Use the current buffer value only if buf is the current buffer. */
983 if (buf
!= current_buffer
)
986 /* If symbol is unbound, put just the symbol in the list. */
987 if (EQ (val
, Qunbound
))
988 result
= Fcons (XCAR (elt
), result
);
989 /* Otherwise, put (symbol . value) in the list. */
991 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
997 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
998 Sbuffer_local_variables
, 0, 1, 0,
999 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1000 Most elements look like (SYMBOL . VALUE), describing one variable.
1001 For a symbol that is locally unbound, just the symbol appears in the value.
1002 Note that storing new VALUEs in these elements doesn't change the variables.
1003 No argument or nil as argument means use current buffer as BUFFER. */)
1005 register Lisp_Object buffer
;
1007 register struct buffer
*buf
;
1008 register Lisp_Object result
;
1011 buf
= current_buffer
;
1014 CHECK_BUFFER (buffer
);
1015 buf
= XBUFFER (buffer
);
1018 result
= buffer_lisp_local_variables (buf
);
1020 /* Add on all the variables stored in special slots. */
1024 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
1025 offset
< sizeof (struct buffer
);
1026 /* sizeof EMACS_INT == sizeof Lisp_Object */
1027 offset
+= (sizeof (EMACS_INT
)))
1029 idx
= PER_BUFFER_IDX (offset
);
1030 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1031 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1032 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1033 PER_BUFFER_VALUE (buf
, offset
)),
1041 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1043 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1044 No argument or nil as argument means use current buffer as BUFFER. */)
1046 register Lisp_Object buffer
;
1048 register struct buffer
*buf
;
1050 buf
= current_buffer
;
1053 CHECK_BUFFER (buffer
);
1054 buf
= XBUFFER (buffer
);
1057 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1060 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1062 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1063 A non-nil FLAG means mark the buffer modified. */)
1065 register Lisp_Object flag
;
1067 register int already
;
1068 register Lisp_Object fn
;
1069 Lisp_Object buffer
, window
;
1071 #ifdef CLASH_DETECTION
1072 /* If buffer becoming modified, lock the file.
1073 If buffer becoming unmodified, unlock the file. */
1075 fn
= current_buffer
->file_truename
;
1076 /* Test buffer-file-name so that binding it to nil is effective. */
1077 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1079 already
= SAVE_MODIFF
< MODIFF
;
1080 if (!already
&& !NILP (flag
))
1082 else if (already
&& NILP (flag
))
1085 #endif /* CLASH_DETECTION */
1087 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1089 /* Set update_mode_lines only if buffer is displayed in some window.
1090 Packages like jit-lock or lazy-lock preserve a buffer's modified
1091 state by recording/restoring the state around blocks of code.
1092 Setting update_mode_lines makes redisplay consider all windows
1093 (on all frames). Stealth fontification of buffers not displayed
1094 would incur additional redisplay costs if we'd set
1095 update_modes_lines unconditionally.
1097 Ideally, I think there should be another mechanism for fontifying
1098 buffers without "modifying" buffers, or redisplay should be
1099 smarter about updating the `*' in mode lines. --gerd */
1100 XSETBUFFER (buffer
, current_buffer
);
1101 window
= Fget_buffer_window (buffer
, Qt
);
1102 if (WINDOWP (window
))
1104 ++update_mode_lines
;
1105 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1111 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1112 Srestore_buffer_modified_p
, 1, 1, 0,
1113 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1114 It is not ensured that mode lines will be updated to show the modified
1115 state of the current buffer. Use with care. */)
1119 #ifdef CLASH_DETECTION
1122 /* If buffer becoming modified, lock the file.
1123 If buffer becoming unmodified, unlock the file. */
1125 fn
= current_buffer
->file_truename
;
1126 /* Test buffer-file-name so that binding it to nil is effective. */
1127 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1129 int already
= SAVE_MODIFF
< MODIFF
;
1130 if (!already
&& !NILP (flag
))
1132 else if (already
&& NILP (flag
))
1135 #endif /* CLASH_DETECTION */
1137 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1141 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1143 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1144 Each buffer has a tick counter which is incremented each time the text in
1145 that buffer is changed. It wraps around occasionally.
1146 No argument or nil as argument means use current buffer as BUFFER. */)
1148 register Lisp_Object buffer
;
1150 register struct buffer
*buf
;
1152 buf
= current_buffer
;
1155 CHECK_BUFFER (buffer
);
1156 buf
= XBUFFER (buffer
);
1159 return make_number (BUF_MODIFF (buf
));
1162 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1163 "sRename buffer (to new name): \nP",
1164 doc
: /* Change current buffer's name to NEWNAME (a string).
1165 If second arg UNIQUE is nil or omitted, it is an error if a
1166 buffer named NEWNAME already exists.
1167 If UNIQUE is non-nil, come up with a new name using
1168 `generate-new-buffer-name'.
1169 Interactively, you can set UNIQUE with a prefix argument.
1170 We return the name we actually gave the buffer.
1171 This does not change the name of the visited file (if any). */)
1173 register Lisp_Object newname
, unique
;
1175 register Lisp_Object tem
, buf
;
1177 CHECK_STRING (newname
);
1179 if (SCHARS (newname
) == 0)
1180 error ("Empty string is invalid as a buffer name");
1182 tem
= Fget_buffer (newname
);
1185 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1186 rename the buffer automatically so you can create another
1187 with the original name. It makes UNIQUE equivalent to
1188 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1189 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1190 return current_buffer
->name
;
1192 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1194 error ("Buffer name `%s' is in use", SDATA (newname
));
1197 current_buffer
->name
= newname
;
1199 /* Catch redisplay's attention. Unless we do this, the mode lines for
1200 any windows displaying current_buffer will stay unchanged. */
1201 update_mode_lines
++;
1203 XSETBUFFER (buf
, current_buffer
);
1204 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1205 if (NILP (current_buffer
->filename
)
1206 && !NILP (current_buffer
->auto_save_file_name
))
1207 call0 (intern ("rename-auto-save-file"));
1208 /* Refetch since that last call may have done GC. */
1209 return current_buffer
->name
;
1212 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1213 doc
: /* Return most recently selected buffer other than BUFFER.
1214 Buffers not visible in windows are preferred to visible buffers,
1215 unless optional second argument VISIBLE-OK is non-nil.
1216 If the optional third argument FRAME is non-nil, use that frame's
1217 buffer list instead of the selected frame's buffer list.
1218 If no other buffer exists, the buffer `*scratch*' is returned.
1219 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1220 (buffer
, visible_ok
, frame
)
1221 register Lisp_Object buffer
, visible_ok
, frame
;
1223 Lisp_Object
Fset_buffer_major_mode ();
1224 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1228 frame
= selected_frame
;
1230 tail
= Vbuffer_alist
;
1231 pred
= frame_buffer_predicate (frame
);
1233 /* Consider buffers that have been seen in the selected frame
1234 before other buffers. */
1236 tem
= frame_buffer_list (frame
);
1240 if (BUFFERP (XCAR (tem
)))
1241 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1244 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1246 for (; CONSP (tail
); tail
= XCDR (tail
))
1248 buf
= Fcdr (XCAR (tail
));
1249 if (EQ (buf
, buffer
))
1253 if (NILP (XBUFFER (buf
)->name
))
1255 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1257 /* If the selected frame has a buffer_predicate,
1258 disregard buffers that don't fit the predicate. */
1261 tem
= call1 (pred
, buf
);
1266 if (NILP (visible_ok
))
1267 tem
= Fget_buffer_window (buf
, Qvisible
);
1272 if (NILP (notsogood
))
1275 if (!NILP (notsogood
))
1277 buf
= Fget_buffer (build_string ("*scratch*"));
1280 buf
= Fget_buffer_create (build_string ("*scratch*"));
1281 Fset_buffer_major_mode (buf
);
1286 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1288 doc
: /* Start keeping undo information for buffer BUFFER.
1289 No argument or nil as argument means do this for the current buffer. */)
1291 register Lisp_Object buffer
;
1293 Lisp_Object real_buffer
;
1296 XSETBUFFER (real_buffer
, current_buffer
);
1299 real_buffer
= Fget_buffer (buffer
);
1300 if (NILP (real_buffer
))
1304 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1305 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1311 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1312 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1313 The buffer being killed will be current while the hook is running.\n\
1316 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1317 doc
: /* Kill the buffer BUFFER.
1318 The argument may be a buffer or may be the name of a buffer.
1319 An argument of nil means kill the current buffer.
1321 Value is t if the buffer is actually killed, nil if user says no.
1323 The value of `kill-buffer-hook' (which may be local to that buffer),
1324 if not void, is a list of functions to be called, with no arguments,
1325 before the buffer is actually killed. The buffer to be killed is current
1326 when the hook functions are called.
1328 Any processes that have this buffer as the `process-buffer' are killed
1334 register struct buffer
*b
;
1335 register Lisp_Object tem
;
1336 register struct Lisp_Marker
*m
;
1337 struct gcpro gcpro1
;
1340 buf
= Fcurrent_buffer ();
1342 buf
= Fget_buffer (buffer
);
1348 /* Avoid trouble for buffer already dead. */
1352 /* Query if the buffer is still modified. */
1353 if (INTERACTIVE
&& !NILP (b
->filename
)
1354 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1357 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1358 b
->name
, make_number (0)));
1364 /* Run hooks with the buffer to be killed the current buffer. */
1366 int count
= SPECPDL_INDEX ();
1367 Lisp_Object arglist
[1];
1369 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1370 set_buffer_internal (b
);
1372 /* First run the query functions; if any query is answered no,
1373 don't kill the buffer. */
1374 arglist
[0] = Qkill_buffer_query_functions
;
1375 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1377 return unbind_to (count
, Qnil
);
1379 /* Then run the hooks. */
1380 Frun_hooks (1, &Qkill_buffer_hook
);
1381 unbind_to (count
, Qnil
);
1384 /* We have no more questions to ask. Verify that it is valid
1385 to kill the buffer. This must be done after the questions
1386 since anything can happen within do_yes_or_no_p. */
1388 /* Don't kill the minibuffer now current. */
1389 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1395 /* When we kill a base buffer, kill all its indirect buffers.
1396 We do it at this stage so nothing terrible happens if they
1397 ask questions or their hooks get errors. */
1398 if (! b
->base_buffer
)
1400 struct buffer
*other
;
1404 for (other
= all_buffers
; other
; other
= other
->next
)
1405 /* all_buffers contains dead buffers too;
1406 don't re-kill them. */
1407 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1410 XSETBUFFER (buf
, other
);
1417 /* Make this buffer not be current.
1418 In the process, notice if this is the sole visible buffer
1419 and give up if so. */
1420 if (b
== current_buffer
)
1422 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1424 if (b
== current_buffer
)
1428 /* Notice if the buffer to kill is the sole visible buffer
1429 when we're currently in the mini-buffer, and give up if so. */
1430 XSETBUFFER (tem
, current_buffer
);
1431 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1433 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1438 /* Now there is no question: we can kill the buffer. */
1440 #ifdef CLASH_DETECTION
1441 /* Unlock this buffer's file, if it is locked. */
1443 #endif /* CLASH_DETECTION */
1445 kill_buffer_processes (buf
);
1446 clear_charpos_cache (b
);
1448 tem
= Vinhibit_quit
;
1450 replace_buffer_in_all_windows (buf
);
1451 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1452 frames_discard_buffer (buf
);
1453 Vinhibit_quit
= tem
;
1455 /* Delete any auto-save file, if we saved it in this session.
1456 But not if the buffer is modified. */
1457 if (STRINGP (b
->auto_save_file_name
)
1458 && b
->auto_save_modified
!= 0
1459 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1460 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1461 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1464 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1466 internal_delete_file (b
->auto_save_file_name
);
1471 /* Unchain all markers that belong to this indirect buffer.
1472 Don't unchain the markers that belong to the base buffer
1473 or its other indirect buffers. */
1474 for (m
= BUF_MARKERS (b
); m
; )
1476 struct Lisp_Marker
*next
= m
->next
;
1484 /* Unchain all markers of this buffer and its indirect buffers.
1485 and leave them pointing nowhere. */
1486 for (m
= BUF_MARKERS (b
); m
; )
1488 struct Lisp_Marker
*next
= m
->next
;
1493 BUF_MARKERS (b
) = NULL
;
1494 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1496 /* Perhaps we should explicitly free the interval tree here... */
1499 /* Reset the local variables, so that this buffer's local values
1500 won't be protected from GC. They would be protected
1501 if they happened to remain encached in their symbols.
1502 This gets rid of them for certain. */
1503 swap_out_buffer_local_variables (b
);
1504 reset_buffer_local_variables (b
, 1);
1509 if (! b
->base_buffer
)
1510 free_buffer_text (b
);
1512 if (b
->newline_cache
)
1514 free_region_cache (b
->newline_cache
);
1515 b
->newline_cache
= 0;
1517 if (b
->width_run_cache
)
1519 free_region_cache (b
->width_run_cache
);
1520 b
->width_run_cache
= 0;
1522 b
->width_table
= Qnil
;
1524 b
->undo_list
= Qnil
;
1529 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1530 we do this each time BUF is selected visibly, the more recently
1531 selected buffers are always closer to the front of the list. This
1532 means that other_buffer is more likely to choose a relevant buffer. */
1538 register Lisp_Object link
, prev
;
1540 frame
= selected_frame
;
1543 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1545 if (EQ (XCDR (XCAR (link
)), buf
))
1550 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1551 we cannot use Fdelq itself here because it allows quitting. */
1554 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1556 XSETCDR (prev
, XCDR (XCDR (prev
)));
1558 XSETCDR (link
, Vbuffer_alist
);
1559 Vbuffer_alist
= link
;
1561 /* Effectively do a delq on buried_buffer_list. */
1564 for (link
= XFRAME (frame
)->buried_buffer_list
; CONSP (link
);
1567 if (EQ (XCAR (link
), buf
))
1570 XFRAME (frame
)->buried_buffer_list
= XCDR (link
);
1572 XSETCDR (prev
, XCDR (XCDR (prev
)));
1578 /* Now move this buffer to the front of frame_buffer_list also. */
1581 for (link
= frame_buffer_list (frame
); CONSP (link
);
1584 if (EQ (XCAR (link
), buf
))
1589 /* Effectively do delq. */
1594 set_frame_buffer_list (frame
,
1595 XCDR (frame_buffer_list (frame
)));
1597 XSETCDR (prev
, XCDR (XCDR (prev
)));
1599 XSETCDR (link
, frame_buffer_list (frame
));
1600 set_frame_buffer_list (frame
, link
);
1603 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1606 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1607 doc
: /* Set an appropriate major mode for BUFFER.
1608 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1609 according to `default-major-mode'.
1610 Use this function before selecting the buffer, since it may need to inspect
1611 the current buffer's major mode. */)
1616 Lisp_Object function
;
1618 if (STRINGP (XBUFFER (buffer
)->name
)
1619 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1620 function
= find_symbol_value (intern ("initial-major-mode"));
1623 function
= buffer_defaults
.major_mode
;
1625 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1626 function
= current_buffer
->major_mode
;
1629 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1632 count
= SPECPDL_INDEX ();
1634 /* To select a nonfundamental mode,
1635 select the buffer temporarily and then call the mode function. */
1637 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1639 Fset_buffer (buffer
);
1642 return unbind_to (count
, Qnil
);
1645 /* If switching buffers in WINDOW would be an error, return
1646 a C string saying what the error would be. */
1649 no_switch_window (window
)
1653 if (EQ (minibuf_window
, window
))
1654 return "Cannot switch buffers in minibuffer window";
1655 tem
= Fwindow_dedicated_p (window
);
1657 return "Cannot switch buffers in a dedicated window";
1661 /* Switch to buffer BUFFER in the selected window.
1662 If NORECORD is non-nil, don't call record_buffer. */
1665 switch_to_buffer_1 (buffer
, norecord
)
1666 Lisp_Object buffer
, norecord
;
1668 register Lisp_Object buf
;
1671 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1674 buf
= Fget_buffer (buffer
);
1677 buf
= Fget_buffer_create (buffer
);
1678 Fset_buffer_major_mode (buf
);
1682 if (NILP (norecord
))
1683 record_buffer (buf
);
1685 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1686 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1693 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1694 doc
: /* Select buffer BUFFER in the current window.
1695 If BUFFER does not identify an existing buffer,
1696 then this function creates a buffer with that name.
1698 When called from Lisp, BUFFER may be a buffer, a string \(a buffer name),
1699 or nil. If BUFFER is nil, then this function chooses a buffer
1700 using `other-buffer'.
1701 Optional second arg NORECORD non-nil means
1702 do not put this buffer at the front of the list of recently selected ones.
1703 This function returns the buffer it switched to.
1705 WARNING: This is NOT the way to work on another buffer temporarily
1706 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1707 the window-buffer correspondences. */)
1709 Lisp_Object buffer
, norecord
;
1713 if (EQ (buffer
, Fwindow_buffer (selected_window
)))
1714 /* Basically a NOP. Avoid signalling an error if the selected window
1715 is dedicated, or a minibuffer, ... */
1716 return Fset_buffer (buffer
);
1718 err
= no_switch_window (selected_window
);
1719 if (err
) error (err
);
1721 return switch_to_buffer_1 (buffer
, norecord
);
1724 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1725 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1726 BUFFER may be a buffer, a string \(a buffer name), or nil.
1727 If BUFFER is a string which is not the name of an existing buffer,
1728 then this function creates a buffer with that name.
1729 If BUFFER is nil, then it chooses some other buffer.
1730 If `pop-up-windows' is non-nil, windows can be split to do this.
1731 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1732 window even if BUFFER is already visible in the selected window,
1733 and ignore `same-window-regexps' and `same-window-buffer-names'.
1734 This function returns the buffer it switched to.
1735 This uses the function `display-buffer' as a subroutine; see the documentation
1736 of `display-buffer' for additional customization information.
1738 Optional third arg NORECORD non-nil means
1739 do not put this buffer at the front of the list of recently selected ones. */)
1740 (buffer
, other_window
, norecord
)
1741 Lisp_Object buffer
, other_window
, norecord
;
1743 register Lisp_Object buf
;
1745 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1748 buf
= Fget_buffer (buffer
);
1751 buf
= Fget_buffer_create (buffer
);
1752 Fset_buffer_major_mode (buf
);
1756 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
), norecord
);
1760 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1761 doc
: /* Return the current buffer as a Lisp object. */)
1764 register Lisp_Object buf
;
1765 XSETBUFFER (buf
, current_buffer
);
1769 /* Set the current buffer to B.
1771 We previously set windows_or_buffers_changed here to invalidate
1772 global unchanged information in beg_unchanged and end_unchanged.
1773 This is no longer necessary because we now compute unchanged
1774 information on a buffer-basis. Every action affecting other
1775 windows than the selected one requires a select_window at some
1776 time, and that increments windows_or_buffers_changed. */
1779 set_buffer_internal (b
)
1780 register struct buffer
*b
;
1782 if (current_buffer
!= b
)
1783 set_buffer_internal_1 (b
);
1786 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1787 This is used by redisplay. */
1790 set_buffer_internal_1 (b
)
1791 register struct buffer
*b
;
1793 register struct buffer
*old_buf
;
1794 register Lisp_Object tail
, valcontents
;
1797 #ifdef USE_MMAP_FOR_BUFFERS
1798 if (b
->text
->beg
== NULL
)
1799 enlarge_buffer_text (b
, 0);
1800 #endif /* USE_MMAP_FOR_BUFFERS */
1802 if (current_buffer
== b
)
1805 old_buf
= current_buffer
;
1807 last_known_column_point
= -1; /* invalidate indentation cache */
1811 /* Put the undo list back in the base buffer, so that it appears
1812 that an indirect buffer shares the undo list of its base. */
1813 if (old_buf
->base_buffer
)
1814 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1816 /* If the old current buffer has markers to record PT, BEGV and ZV
1817 when it is not current, update them now. */
1818 if (! NILP (old_buf
->pt_marker
))
1821 XSETBUFFER (obuf
, old_buf
);
1822 set_marker_both (old_buf
->pt_marker
, obuf
,
1823 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1825 if (! NILP (old_buf
->begv_marker
))
1828 XSETBUFFER (obuf
, old_buf
);
1829 set_marker_both (old_buf
->begv_marker
, obuf
,
1830 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1832 if (! NILP (old_buf
->zv_marker
))
1835 XSETBUFFER (obuf
, old_buf
);
1836 set_marker_both (old_buf
->zv_marker
, obuf
,
1837 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1841 /* Get the undo list from the base buffer, so that it appears
1842 that an indirect buffer shares the undo list of its base. */
1844 b
->undo_list
= b
->base_buffer
->undo_list
;
1846 /* If the new current buffer has markers to record PT, BEGV and ZV
1847 when it is not current, fetch them now. */
1848 if (! NILP (b
->pt_marker
))
1850 BUF_PT (b
) = marker_position (b
->pt_marker
);
1851 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1853 if (! NILP (b
->begv_marker
))
1855 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1856 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1858 if (! NILP (b
->zv_marker
))
1860 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1861 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1864 /* Look down buffer's list of local Lisp variables
1865 to find and update any that forward into C variables. */
1867 for (tail
= b
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1869 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1870 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1871 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1872 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1873 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1874 /* Just reference the variable
1875 to cause it to become set for this buffer. */
1876 Fsymbol_value (XCAR (XCAR (tail
)));
1879 /* Do the same with any others that were local to the previous buffer */
1882 for (tail
= old_buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1884 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1885 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1886 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1887 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1888 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1889 /* Just reference the variable
1890 to cause it to become set for this buffer. */
1891 Fsymbol_value (XCAR (XCAR (tail
)));
1895 /* Switch to buffer B temporarily for redisplay purposes.
1896 This avoids certain things that don't need to be done within redisplay. */
1902 register struct buffer
*old_buf
;
1904 if (current_buffer
== b
)
1907 old_buf
= current_buffer
;
1912 /* If the old current buffer has markers to record PT, BEGV and ZV
1913 when it is not current, update them now. */
1914 if (! NILP (old_buf
->pt_marker
))
1917 XSETBUFFER (obuf
, old_buf
);
1918 set_marker_both (old_buf
->pt_marker
, obuf
,
1919 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1921 if (! NILP (old_buf
->begv_marker
))
1924 XSETBUFFER (obuf
, old_buf
);
1925 set_marker_both (old_buf
->begv_marker
, obuf
,
1926 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1928 if (! NILP (old_buf
->zv_marker
))
1931 XSETBUFFER (obuf
, old_buf
);
1932 set_marker_both (old_buf
->zv_marker
, obuf
,
1933 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1937 /* If the new current buffer has markers to record PT, BEGV and ZV
1938 when it is not current, fetch them now. */
1939 if (! NILP (b
->pt_marker
))
1941 BUF_PT (b
) = marker_position (b
->pt_marker
);
1942 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1944 if (! NILP (b
->begv_marker
))
1946 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1947 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1949 if (! NILP (b
->zv_marker
))
1951 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1952 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1956 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1957 doc
: /* Make the buffer BUFFER current for editing operations.
1958 BUFFER may be a buffer or the name of an existing buffer.
1959 See also `save-excursion' when you want to make a buffer current temporarily.
1960 This function does not display the buffer, so its effect ends
1961 when the current command terminates.
1962 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1964 register Lisp_Object buffer
;
1966 register Lisp_Object buf
;
1967 buf
= Fget_buffer (buffer
);
1970 if (NILP (XBUFFER (buf
)->name
))
1971 error ("Selecting deleted buffer");
1972 set_buffer_internal (XBUFFER (buf
));
1976 /* Set the current buffer to BUFFER provided it is alive. */
1979 set_buffer_if_live (buffer
)
1982 if (! NILP (XBUFFER (buffer
)->name
))
1983 Fset_buffer (buffer
);
1987 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1988 Sbarf_if_buffer_read_only
, 0, 0, 0,
1989 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1992 if (!NILP (current_buffer
->read_only
)
1993 && NILP (Vinhibit_read_only
))
1994 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1998 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1999 doc
: /* Put BUFFER at the end of the list of all buffers.
2000 There it is the least likely candidate for `other-buffer' to return;
2001 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
2002 You can specify a buffer name as BUFFER, or an actual buffer object.
2003 If BUFFER is nil or omitted, bury the current buffer.
2004 Also, if BUFFER is nil or omitted, remove the current buffer from the
2005 selected window if it is displayed there. */)
2007 register Lisp_Object buffer
;
2009 /* Figure out what buffer we're going to bury. */
2013 XSETBUFFER (buffer
, current_buffer
);
2015 tem
= Fwindow_buffer (selected_window
);
2016 /* If we're burying the current buffer, unshow it. */
2017 if (EQ (buffer
, tem
))
2019 if (NILP (Fwindow_dedicated_p (selected_window
)))
2020 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
2021 else if (NILP (XWINDOW (selected_window
)->parent
))
2022 Ficonify_frame (Fwindow_frame (selected_window
));
2024 Fdelete_window (selected_window
);
2031 buf1
= Fget_buffer (buffer
);
2037 /* Move buffer to the end of the buffer list. Do nothing if the
2038 buffer is killed. */
2039 if (!NILP (XBUFFER (buffer
)->name
))
2041 Lisp_Object aelt
, link
;
2043 aelt
= Frassq (buffer
, Vbuffer_alist
);
2044 link
= Fmemq (aelt
, Vbuffer_alist
);
2045 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
2046 XSETCDR (link
, Qnil
);
2047 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
2049 XFRAME (selected_frame
)->buffer_list
2050 = Fdelq (buffer
, XFRAME (selected_frame
)->buffer_list
);
2051 XFRAME (selected_frame
)->buried_buffer_list
2052 = Fcons (buffer
, Fdelq (buffer
, XFRAME (selected_frame
)->buried_buffer_list
));
2058 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2059 doc
: /* Delete the entire contents of the current buffer.
2060 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2061 so the buffer is truly empty after this. */)
2068 current_buffer
->last_window_start
= 1;
2069 /* Prevent warnings, or suspension of auto saving, that would happen
2070 if future size is less than past size. Use of erase-buffer
2071 implies that the future text is not really related to the past text. */
2072 XSETFASTINT (current_buffer
->save_length
, 0);
2077 validate_region (b
, e
)
2078 register Lisp_Object
*b
, *e
;
2080 CHECK_NUMBER_COERCE_MARKER (*b
);
2081 CHECK_NUMBER_COERCE_MARKER (*e
);
2083 if (XINT (*b
) > XINT (*e
))
2086 tem
= *b
; *b
= *e
; *e
= tem
;
2089 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2090 && XINT (*e
) <= ZV
))
2091 args_out_of_range (*b
, *e
);
2094 /* Advance BYTE_POS up to a character boundary
2095 and return the adjusted position. */
2098 advance_to_char_boundary (byte_pos
)
2103 if (byte_pos
== BEG
)
2104 /* Beginning of buffer is always a character boundary. */
2107 c
= FETCH_BYTE (byte_pos
);
2108 if (! CHAR_HEAD_P (c
))
2110 /* We should advance BYTE_POS only when C is a constituent of a
2111 multibyte sequence. */
2112 int orig_byte_pos
= byte_pos
;
2117 c
= FETCH_BYTE (byte_pos
);
2119 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2121 if (byte_pos
< orig_byte_pos
)
2122 byte_pos
= orig_byte_pos
;
2123 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2124 surely advance to the correct character boundary. If C is
2125 not, BYTE_POS was unchanged. */
2131 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2133 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2134 If FLAG is t, this makes the buffer a multibyte buffer.
2135 If FLAG is nil, this makes the buffer a single-byte buffer.
2136 The buffer contents remain unchanged as a sequence of bytes
2137 but the contents viewed as characters do change.
2138 If the multibyte flag was really changed, undo information of the
2139 current buffer is cleared. */)
2143 struct Lisp_Marker
*tail
, *markers
;
2144 struct buffer
*other
;
2145 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2147 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2148 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2150 if (current_buffer
->base_buffer
)
2151 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2153 /* Do nothing if nothing actually changes. */
2154 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2157 /* It would be better to update the list,
2158 but this is good enough for now. */
2160 current_buffer
->undo_list
= Qt
;
2162 /* If the cached position is for this buffer, clear it out. */
2163 clear_charpos_cache (current_buffer
);
2166 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2168 begv
= BEGV
, zv
= ZV
;
2178 /* Do this first, so it can use CHAR_TO_BYTE
2179 to calculate the old correspondences. */
2180 set_intervals_multibyte (0);
2182 current_buffer
->enable_multibyte_characters
= Qnil
;
2188 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2191 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2192 tail
->charpos
= tail
->bytepos
;
2194 /* Convert multibyte form of 8-bit characters to unibyte. */
2209 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2210 p
+= bytes
, pos
+= bytes
;
2213 c
= STRING_CHAR (p
, stop
- pos
);
2214 /* Delete all bytes for this 8-bit character but the
2215 last one, and change the last one to the charcter
2218 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2230 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2238 /* Be sure not to have a multibyte sequence striding over the GAP.
2239 Ex: We change this: "...abc\201 _GAP_ \241def..."
2240 to: "...abc _GAP_ \201\241def..." */
2242 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2243 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2245 unsigned char *p
= GPT_ADDR
- 1;
2247 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2248 if (BASE_LEADING_CODE_P (*p
))
2250 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2252 move_gap_both (new_gpt
, new_gpt
);
2256 /* Make the buffer contents valid as multibyte by converting
2257 8-bit characters to multibyte form. */
2273 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2274 p
+= bytes
, pos
+= bytes
;
2277 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2279 bytes
= CHAR_STRING (*p
, tmp
);
2281 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2283 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2284 /* Now the gap is after the just inserted data. */
2301 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2303 /* Do this first, so that chars_in_text asks the right question.
2304 set_intervals_multibyte needs it too. */
2305 current_buffer
->enable_multibyte_characters
= Qt
;
2307 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2308 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2310 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2312 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2313 if (BEGV_BYTE
> GPT_BYTE
)
2314 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2316 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2318 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2319 if (ZV_BYTE
> GPT_BYTE
)
2320 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2322 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2325 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2328 if (pt_byte
> GPT_BYTE
)
2329 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2331 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2332 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2335 tail
= markers
= BUF_MARKERS (current_buffer
);
2337 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2338 getting confused by the markers that have not yet been updated.
2339 It is also a signal that it should never create a marker. */
2340 BUF_MARKERS (current_buffer
) = NULL
;
2342 for (; tail
; tail
= tail
->next
)
2344 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2345 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2348 /* Make sure no markers were put on the chain
2349 while the chain value was incorrect. */
2350 if (BUF_MARKERS (current_buffer
))
2353 BUF_MARKERS (current_buffer
) = markers
;
2355 /* Do this last, so it can calculate the new correspondences
2356 between chars and bytes. */
2357 set_intervals_multibyte (1);
2361 current_buffer
->undo_list
= Qnil
;
2363 /* Changing the multibyteness of a buffer means that all windows
2364 showing that buffer must be updated thoroughly. */
2365 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2366 ++windows_or_buffers_changed
;
2368 /* Copy this buffer's new multibyte status
2369 into all of its indirect buffers. */
2370 for (other
= all_buffers
; other
; other
= other
->next
)
2371 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2373 other
->enable_multibyte_characters
2374 = current_buffer
->enable_multibyte_characters
;
2375 other
->prevent_redisplay_optimizations_p
= 1;
2378 /* Restore the modifiedness of the buffer. */
2379 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2380 Fset_buffer_modified_p (Qnil
);
2383 /* Update coding systems of this buffer's process (if any). */
2385 Lisp_Object process
;
2387 process
= Fget_buffer_process (Fcurrent_buffer ());
2388 if (PROCESSP (process
))
2389 setup_process_coding_systems (process
);
2391 #endif /* subprocesses */
2396 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2398 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2399 Most local variable bindings are eliminated so that the default values
2400 become effective once more. Also, the syntax table is set from
2401 `standard-syntax-table', the local keymap is set to nil,
2402 and the abbrev table from `fundamental-mode-abbrev-table'.
2403 This function also forces redisplay of the mode line.
2405 Every function to select a new major mode starts by
2406 calling this function.
2408 As a special exception, local variables whose names have
2409 a non-nil `permanent-local' property are not eliminated by this function.
2411 The first thing this function does is run
2412 the normal hook `change-major-mode-hook'. */)
2415 register Lisp_Object alist
, sym
, tem
;
2418 if (!NILP (Vrun_hooks
))
2419 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2420 oalist
= current_buffer
->local_var_alist
;
2422 /* Make sure none of the bindings in oalist
2423 remain swapped in, in their symbols. */
2425 swap_out_buffer_local_variables (current_buffer
);
2427 /* Actually eliminate all local bindings of this buffer. */
2429 reset_buffer_local_variables (current_buffer
, 0);
2431 /* Any which are supposed to be permanent,
2432 make local again, with the same values they had. */
2434 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2436 sym
= XCAR (XCAR (alist
));
2437 tem
= Fget (sym
, Qpermanent_local
);
2440 Fmake_local_variable (sym
);
2441 Fset (sym
, XCDR (XCAR (alist
)));
2445 /* Force mode-line redisplay. Useful here because all major mode
2446 commands call this function. */
2447 update_mode_lines
++;
2452 /* Make sure no local variables remain set up with buffer B
2453 for their current values. */
2456 swap_out_buffer_local_variables (b
)
2459 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2461 XSETBUFFER (buffer
, b
);
2462 oalist
= b
->local_var_alist
;
2464 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2466 sym
= XCAR (XCAR (alist
));
2468 /* Need not do anything if some other buffer's binding is now encached. */
2469 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2470 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2472 /* Symbol is set up for this buffer's old local value.
2473 Set it up for the current buffer with the default value. */
2475 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2476 /* Store the symbol's current value into the alist entry
2477 it is currently set up for. This is so that, if the
2478 local is marked permanent, and we make it local again
2479 later in Fkill_all_local_variables, we don't lose the value. */
2480 XSETCDR (XCAR (tem
),
2481 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2482 /* Switch to the symbol's default-value alist entry. */
2484 /* Mark it as current for buffer B. */
2485 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2486 /* Store the current value into any forwarding in the symbol. */
2487 store_symval_forwarding (sym
,
2488 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2494 /* Find all the overlays in the current buffer that contain position POS.
2495 Return the number found, and store them in a vector in *VEC_PTR.
2496 Store in *LEN_PTR the size allocated for the vector.
2497 Store in *NEXT_PTR the next position after POS where an overlay starts,
2498 or ZV if there are no more overlays.
2499 Store in *PREV_PTR the previous position before POS where an overlay ends,
2500 or where an overlay starts which ends at or after POS;
2501 or BEGV if there are no such overlays.
2502 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2504 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2505 when this function is called.
2507 If EXTEND is non-zero, we make the vector bigger if necessary.
2508 If EXTEND is zero, we never extend the vector,
2509 and we store only as many overlays as will fit.
2510 But we still return the total number of overlays.
2512 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2513 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2514 default (BEGV or ZV). */
2517 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2520 Lisp_Object
**vec_ptr
;
2526 Lisp_Object overlay
, start
, end
;
2527 struct Lisp_Overlay
*tail
;
2530 Lisp_Object
*vec
= *vec_ptr
;
2533 int inhibit_storing
= 0;
2535 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2537 int startpos
, endpos
;
2539 XSETMISC (overlay
, tail
);
2541 start
= OVERLAY_START (overlay
);
2542 end
= OVERLAY_END (overlay
);
2543 endpos
= OVERLAY_POSITION (end
);
2550 startpos
= OVERLAY_POSITION (start
);
2551 /* This one ends at or after POS
2552 so its start counts for PREV_PTR if it's before POS. */
2553 if (prev
< startpos
&& startpos
< pos
)
2557 if (startpos
<= pos
)
2561 /* The supplied vector is full.
2562 Either make it bigger, or don't store any more in it. */
2565 /* Make it work with an initial len == 0. */
2570 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2574 inhibit_storing
= 1;
2577 if (!inhibit_storing
)
2579 /* Keep counting overlays even if we can't return them all. */
2582 else if (startpos
< next
)
2586 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2588 int startpos
, endpos
;
2590 XSETMISC (overlay
, tail
);
2592 start
= OVERLAY_START (overlay
);
2593 end
= OVERLAY_END (overlay
);
2594 startpos
= OVERLAY_POSITION (start
);
2597 if (startpos
< next
)
2601 endpos
= OVERLAY_POSITION (end
);
2608 /* Make it work with an initial len == 0. */
2613 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2617 inhibit_storing
= 1;
2620 if (!inhibit_storing
)
2624 if (startpos
< pos
&& startpos
> prev
)
2627 else if (endpos
< pos
&& endpos
> prev
)
2629 else if (endpos
== pos
&& startpos
> prev
2630 && (!change_req
|| startpos
< pos
))
2641 /* Find all the overlays in the current buffer that overlap the range BEG-END
2642 or are empty at BEG.
2644 Return the number found, and store them in a vector in *VEC_PTR.
2645 Store in *LEN_PTR the size allocated for the vector.
2646 Store in *NEXT_PTR the next position after POS where an overlay starts,
2647 or ZV if there are no more overlays.
2648 Store in *PREV_PTR the previous position before POS where an overlay ends,
2649 or BEGV if there are no previous overlays.
2650 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2652 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2653 when this function is called.
2655 If EXTEND is non-zero, we make the vector bigger if necessary.
2656 If EXTEND is zero, we never extend the vector,
2657 and we store only as many overlays as will fit.
2658 But we still return the total number of overlays. */
2661 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2664 Lisp_Object
**vec_ptr
;
2669 Lisp_Object overlay
, ostart
, oend
;
2670 struct Lisp_Overlay
*tail
;
2673 Lisp_Object
*vec
= *vec_ptr
;
2676 int inhibit_storing
= 0;
2678 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2680 int startpos
, endpos
;
2682 XSETMISC (overlay
, tail
);
2684 ostart
= OVERLAY_START (overlay
);
2685 oend
= OVERLAY_END (overlay
);
2686 endpos
= OVERLAY_POSITION (oend
);
2693 startpos
= OVERLAY_POSITION (ostart
);
2694 /* Count an interval if it either overlaps the range
2695 or is empty at the start of the range. */
2696 if ((beg
< endpos
&& startpos
< end
)
2697 || (startpos
== endpos
&& beg
== endpos
))
2701 /* The supplied vector is full.
2702 Either make it bigger, or don't store any more in it. */
2705 /* Make it work with an initial len == 0. */
2710 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2714 inhibit_storing
= 1;
2717 if (!inhibit_storing
)
2719 /* Keep counting overlays even if we can't return them all. */
2722 else if (startpos
< next
)
2726 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2728 int startpos
, endpos
;
2730 XSETMISC (overlay
, tail
);
2732 ostart
= OVERLAY_START (overlay
);
2733 oend
= OVERLAY_END (overlay
);
2734 startpos
= OVERLAY_POSITION (ostart
);
2737 if (startpos
< next
)
2741 endpos
= OVERLAY_POSITION (oend
);
2742 /* Count an interval if it either overlaps the range
2743 or is empty at the start of the range. */
2744 if ((beg
< endpos
&& startpos
< end
)
2745 || (startpos
== endpos
&& beg
== endpos
))
2751 /* Make it work with an initial len == 0. */
2756 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2760 inhibit_storing
= 1;
2763 if (!inhibit_storing
)
2767 else if (endpos
< beg
&& endpos
> prev
)
2779 /* Return non-zero if there exists an overlay with a non-nil
2780 `mouse-face' property overlapping OVERLAY. */
2783 mouse_face_overlay_overlaps (overlay
)
2784 Lisp_Object overlay
;
2786 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2787 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2789 Lisp_Object
*v
, tem
;
2792 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2793 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2796 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2797 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2800 for (i
= 0; i
< n
; ++i
)
2801 if (!EQ (v
[i
], overlay
)
2802 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2811 /* Fast function to just test if we're at an overlay boundary. */
2813 overlay_touches_p (pos
)
2816 Lisp_Object overlay
;
2817 struct Lisp_Overlay
*tail
;
2819 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2823 XSETMISC (overlay
,tail
);
2824 if (!GC_OVERLAYP (overlay
))
2827 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2830 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2834 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2838 XSETMISC (overlay
, tail
);
2839 if (!GC_OVERLAYP (overlay
))
2842 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2845 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2853 Lisp_Object overlay
;
2859 compare_overlays (v1
, v2
)
2860 const void *v1
, *v2
;
2862 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2863 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2864 if (s1
->priority
!= s2
->priority
)
2865 return s1
->priority
- s2
->priority
;
2866 if (s1
->beg
!= s2
->beg
)
2867 return s1
->beg
- s2
->beg
;
2868 if (s1
->end
!= s2
->end
)
2869 return s2
->end
- s1
->end
;
2873 /* Sort an array of overlays by priority. The array is modified in place.
2874 The return value is the new size; this may be smaller than the original
2875 size if some of the overlays were invalid or were window-specific. */
2877 sort_overlays (overlay_vec
, noverlays
, w
)
2878 Lisp_Object
*overlay_vec
;
2883 struct sortvec
*sortvec
;
2884 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2886 /* Put the valid and relevant overlays into sortvec. */
2888 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2891 Lisp_Object overlay
;
2893 overlay
= overlay_vec
[i
];
2894 if (OVERLAY_VALID (overlay
)
2895 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2896 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2898 /* If we're interested in a specific window, then ignore
2899 overlays that are limited to some other window. */
2904 window
= Foverlay_get (overlay
, Qwindow
);
2905 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2909 /* This overlay is good and counts: put it into sortvec. */
2910 sortvec
[j
].overlay
= overlay
;
2911 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2912 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2913 tem
= Foverlay_get (overlay
, Qpriority
);
2915 sortvec
[j
].priority
= XINT (tem
);
2917 sortvec
[j
].priority
= 0;
2923 /* Sort the overlays into the proper order: increasing priority. */
2926 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2928 for (i
= 0; i
< noverlays
; i
++)
2929 overlay_vec
[i
] = sortvec
[i
].overlay
;
2935 Lisp_Object string
, string2
;
2942 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2943 int size
; /* Allocated length of that array. */
2944 int used
; /* How much of the array is currently in use. */
2945 int bytes
; /* Total length of the strings in buf. */
2948 /* Buffers for storing information about the overlays touching a given
2949 position. These could be automatic variables in overlay_strings, but
2950 it's more efficient to hold onto the memory instead of repeatedly
2951 allocating and freeing it. */
2952 static struct sortstrlist overlay_heads
, overlay_tails
;
2953 static unsigned char *overlay_str_buf
;
2955 /* Allocated length of overlay_str_buf. */
2956 static int overlay_str_len
;
2958 /* A comparison function suitable for passing to qsort. */
2960 cmp_for_strings (as1
, as2
)
2963 struct sortstr
*s1
= (struct sortstr
*)as1
;
2964 struct sortstr
*s2
= (struct sortstr
*)as2
;
2965 if (s1
->size
!= s2
->size
)
2966 return s2
->size
- s1
->size
;
2967 if (s1
->priority
!= s2
->priority
)
2968 return s1
->priority
- s2
->priority
;
2973 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2974 struct sortstrlist
*ssl
;
2975 Lisp_Object str
, str2
, pri
;
2980 if (ssl
->used
== ssl
->size
)
2986 ssl
->buf
= ((struct sortstr
*)
2987 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2989 ssl
->buf
[ssl
->used
].string
= str
;
2990 ssl
->buf
[ssl
->used
].string2
= str2
;
2991 ssl
->buf
[ssl
->used
].size
= size
;
2992 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2995 if (NILP (current_buffer
->enable_multibyte_characters
))
2996 nbytes
= SCHARS (str
);
2997 else if (! STRING_MULTIBYTE (str
))
2998 nbytes
= count_size_as_multibyte (SDATA (str
),
3001 nbytes
= SBYTES (str
);
3003 ssl
->bytes
+= nbytes
;
3007 if (NILP (current_buffer
->enable_multibyte_characters
))
3008 nbytes
= SCHARS (str2
);
3009 else if (! STRING_MULTIBYTE (str2
))
3010 nbytes
= count_size_as_multibyte (SDATA (str2
),
3013 nbytes
= SBYTES (str2
);
3015 ssl
->bytes
+= nbytes
;
3019 /* Return the concatenation of the strings associated with overlays that
3020 begin or end at POS, ignoring overlays that are specific to a window
3021 other than W. The strings are concatenated in the appropriate order:
3022 shorter overlays nest inside longer ones, and higher priority inside
3023 lower. Normally all of the after-strings come first, but zero-sized
3024 overlays have their after-strings ride along with the before-strings
3025 because it would look strange to print them inside-out.
3027 Returns the string length, and stores the contents indirectly through
3028 PSTR, if that variable is non-null. The string may be overwritten by
3029 subsequent calls. */
3032 overlay_strings (pos
, w
, pstr
)
3035 unsigned char **pstr
;
3037 Lisp_Object overlay
, window
, str
;
3038 struct Lisp_Overlay
*ov
;
3039 int startpos
, endpos
;
3040 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
3042 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3043 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3044 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3046 XSETMISC (overlay
, ov
);
3047 eassert (OVERLAYP (overlay
));
3049 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3050 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3053 if (endpos
!= pos
&& startpos
!= pos
)
3055 window
= Foverlay_get (overlay
, Qwindow
);
3056 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3059 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3060 record_overlay_string (&overlay_heads
, str
,
3062 ? Foverlay_get (overlay
, Qafter_string
)
3064 Foverlay_get (overlay
, Qpriority
),
3066 else if (endpos
== pos
3067 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3068 record_overlay_string (&overlay_tails
, str
, Qnil
,
3069 Foverlay_get (overlay
, Qpriority
),
3072 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3074 XSETMISC (overlay
, ov
);
3075 eassert (OVERLAYP (overlay
));
3077 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3078 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3081 if (endpos
!= pos
&& startpos
!= pos
)
3083 window
= Foverlay_get (overlay
, Qwindow
);
3084 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3087 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3088 record_overlay_string (&overlay_heads
, str
,
3090 ? Foverlay_get (overlay
, Qafter_string
)
3092 Foverlay_get (overlay
, Qpriority
),
3094 else if (endpos
== pos
3095 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3096 record_overlay_string (&overlay_tails
, str
, Qnil
,
3097 Foverlay_get (overlay
, Qpriority
),
3100 if (overlay_tails
.used
> 1)
3101 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3103 if (overlay_heads
.used
> 1)
3104 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3106 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3111 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3113 if (total
> overlay_str_len
)
3115 overlay_str_len
= total
;
3116 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3119 p
= overlay_str_buf
;
3120 for (i
= overlay_tails
.used
; --i
>= 0;)
3123 tem
= overlay_tails
.buf
[i
].string
;
3124 nbytes
= copy_text (SDATA (tem
), p
,
3126 STRING_MULTIBYTE (tem
), multibyte
);
3129 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3132 tem
= overlay_heads
.buf
[i
].string
;
3133 nbytes
= copy_text (SDATA (tem
), p
,
3135 STRING_MULTIBYTE (tem
), multibyte
);
3137 tem
= overlay_heads
.buf
[i
].string2
;
3140 nbytes
= copy_text (SDATA (tem
), p
,
3142 STRING_MULTIBYTE (tem
), multibyte
);
3146 if (p
!= overlay_str_buf
+ total
)
3149 *pstr
= overlay_str_buf
;
3155 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3158 recenter_overlay_lists (buf
, pos
)
3162 Lisp_Object overlay
, beg
, end
;
3163 struct Lisp_Overlay
*prev
, *tail
, *next
;
3165 /* See if anything in overlays_before should move to overlays_after. */
3167 /* We don't strictly need prev in this loop; it should always be nil.
3168 But we use it for symmetry and in case that should cease to be true
3169 with some future change. */
3171 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3174 XSETMISC (overlay
, tail
);
3176 /* If the overlay is not valid, get rid of it. */
3177 if (!OVERLAY_VALID (overlay
))
3182 /* Splice the cons cell TAIL out of overlays_before. */
3186 buf
->overlays_before
= next
;
3192 beg
= OVERLAY_START (overlay
);
3193 end
= OVERLAY_END (overlay
);
3195 if (OVERLAY_POSITION (end
) > pos
)
3197 /* OVERLAY needs to be moved. */
3198 int where
= OVERLAY_POSITION (beg
);
3199 struct Lisp_Overlay
*other
, *other_prev
;
3201 /* Splice the cons cell TAIL out of overlays_before. */
3205 buf
->overlays_before
= next
;
3207 /* Search thru overlays_after for where to put it. */
3209 for (other
= buf
->overlays_after
; other
;
3210 other_prev
= other
, other
= other
->next
)
3212 Lisp_Object otherbeg
, otheroverlay
;
3214 XSETMISC (otheroverlay
, other
);
3215 eassert (OVERLAY_VALID (otheroverlay
));
3217 otherbeg
= OVERLAY_START (otheroverlay
);
3218 if (OVERLAY_POSITION (otherbeg
) >= where
)
3222 /* Add TAIL to overlays_after before OTHER. */
3225 other_prev
->next
= tail
;
3227 buf
->overlays_after
= tail
;
3231 /* We've reached the things that should stay in overlays_before.
3232 All the rest of overlays_before must end even earlier,
3237 /* See if anything in overlays_after should be in overlays_before. */
3239 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3242 XSETMISC (overlay
, tail
);
3244 /* If the overlay is not valid, get rid of it. */
3245 if (!OVERLAY_VALID (overlay
))
3250 /* Splice the cons cell TAIL out of overlays_after. */
3254 buf
->overlays_after
= next
;
3260 beg
= OVERLAY_START (overlay
);
3261 end
= OVERLAY_END (overlay
);
3263 /* Stop looking, when we know that nothing further
3264 can possibly end before POS. */
3265 if (OVERLAY_POSITION (beg
) > pos
)
3268 if (OVERLAY_POSITION (end
) <= pos
)
3270 /* OVERLAY needs to be moved. */
3271 int where
= OVERLAY_POSITION (end
);
3272 struct Lisp_Overlay
*other
, *other_prev
;
3274 /* Splice the cons cell TAIL out of overlays_after. */
3278 buf
->overlays_after
= next
;
3280 /* Search thru overlays_before for where to put it. */
3282 for (other
= buf
->overlays_before
; other
;
3283 other_prev
= other
, other
= other
->next
)
3285 Lisp_Object otherend
, otheroverlay
;
3287 XSETMISC (otheroverlay
, other
);
3288 eassert (OVERLAY_VALID (otheroverlay
));
3290 otherend
= OVERLAY_END (otheroverlay
);
3291 if (OVERLAY_POSITION (otherend
) <= where
)
3295 /* Add TAIL to overlays_before before OTHER. */
3298 other_prev
->next
= tail
;
3300 buf
->overlays_before
= tail
;
3305 buf
->overlay_center
= pos
;
3309 adjust_overlays_for_insert (pos
, length
)
3313 /* After an insertion, the lists are still sorted properly,
3314 but we may need to update the value of the overlay center. */
3315 if (current_buffer
->overlay_center
>= pos
)
3316 current_buffer
->overlay_center
+= length
;
3320 adjust_overlays_for_delete (pos
, length
)
3324 if (current_buffer
->overlay_center
< pos
)
3325 /* The deletion was to our right. No change needed; the before- and
3326 after-lists are still consistent. */
3328 else if (current_buffer
->overlay_center
> pos
+ length
)
3329 /* The deletion was to our left. We need to adjust the center value
3330 to account for the change in position, but the lists are consistent
3331 given the new value. */
3332 current_buffer
->overlay_center
-= length
;
3334 /* We're right in the middle. There might be things on the after-list
3335 that now belong on the before-list. Recentering will move them,
3336 and also update the center point. */
3337 recenter_overlay_lists (current_buffer
, pos
);
3340 /* Fix up overlays that were garbled as a result of permuting markers
3341 in the range START through END. Any overlay with at least one
3342 endpoint in this range will need to be unlinked from the overlay
3343 list and reinserted in its proper place.
3344 Such an overlay might even have negative size at this point.
3345 If so, we'll make the overlay empty. */
3347 fix_start_end_in_overlays (start
, end
)
3348 register int start
, end
;
3350 Lisp_Object overlay
;
3351 struct Lisp_Overlay
*before_list
, *after_list
;
3352 /* These are either nil, indicating that before_list or after_list
3353 should be assigned, or the cons cell the cdr of which should be
3355 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3356 /* 'Parent', likewise, indicates a cons cell or
3357 current_buffer->overlays_before or overlays_after, depending
3358 which loop we're in. */
3359 struct Lisp_Overlay
*tail
, *parent
;
3360 int startpos
, endpos
;
3362 /* This algorithm shifts links around instead of consing and GCing.
3363 The loop invariant is that before_list (resp. after_list) is a
3364 well-formed list except that its last element, the CDR of beforep
3365 (resp. afterp) if beforep (afterp) isn't nil or before_list
3366 (after_list) if it is, is still uninitialized. So it's not a bug
3367 that before_list isn't initialized, although it may look
3369 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3371 XSETMISC (overlay
, tail
);
3373 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3374 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3376 /* If the overlay is backwards, make it empty. */
3377 if (endpos
< startpos
)
3380 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3388 || (startpos
>= start
&& startpos
< end
))
3390 /* Add it to the end of the wrong list. Later on,
3391 recenter_overlay_lists will move it to the right place. */
3392 if (endpos
< current_buffer
->overlay_center
)
3397 afterp
->next
= tail
;
3405 beforep
->next
= tail
;
3409 current_buffer
->overlays_before
= tail
->next
;
3411 parent
->next
= tail
->next
;
3415 parent
= tail
, tail
= parent
->next
;
3417 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3419 XSETMISC (overlay
, tail
);
3421 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3422 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3424 /* If the overlay is backwards, make it empty. */
3425 if (endpos
< startpos
)
3428 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3432 if (startpos
>= end
)
3435 if (startpos
>= start
3436 || (endpos
>= start
&& endpos
< end
))
3438 if (endpos
< current_buffer
->overlay_center
)
3443 afterp
->next
= tail
;
3451 beforep
->next
= tail
;
3455 current_buffer
->overlays_after
= tail
->next
;
3457 parent
->next
= tail
->next
;
3461 parent
= tail
, tail
= parent
->next
;
3464 /* Splice the constructed (wrong) lists into the buffer's lists,
3465 and let the recenter function make it sane again. */
3468 beforep
->next
= current_buffer
->overlays_before
;
3469 current_buffer
->overlays_before
= before_list
;
3471 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3475 afterp
->next
= current_buffer
->overlays_after
;
3476 current_buffer
->overlays_after
= after_list
;
3478 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3481 /* We have two types of overlay: the one whose ending marker is
3482 after-insertion-marker (this is the usual case) and the one whose
3483 ending marker is before-insertion-marker. When `overlays_before'
3484 contains overlays of the latter type and the former type in this
3485 order and both overlays end at inserting position, inserting a text
3486 increases only the ending marker of the latter type, which results
3487 in incorrect ordering of `overlays_before'.
3489 This function fixes ordering of overlays in the slot
3490 `overlays_before' of the buffer *BP. Before the insertion, `point'
3491 was at PREV, and now is at POS. */
3494 fix_overlays_before (bp
, prev
, pos
)
3496 EMACS_INT prev
, pos
;
3498 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3499 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3503 /* After the insertion, the several overlays may be in incorrect
3504 order. The possibility is that, in the list `overlays_before',
3505 an overlay which ends at POS appears after an overlay which ends
3506 at PREV. Since POS is greater than PREV, we must fix the
3507 ordering of these overlays, by moving overlays ends at POS before
3508 the overlays ends at PREV. */
3510 /* At first, find a place where disordered overlays should be linked
3511 in. It is where an overlay which end before POS exists. (i.e. an
3512 overlay whose ending marker is after-insertion-marker if disorder
3515 && (XSETMISC (tem
, tail
),
3516 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3522 /* If we don't find such an overlay,
3523 or the found one ends before PREV,
3524 or the found one is the last one in the list,
3525 we don't have to fix anything. */
3526 if (!tail
|| end
< prev
|| !tail
->next
)
3529 right_pair
= parent
;
3533 /* Now, end position of overlays in the list TAIL should be before
3534 or equal to PREV. In the loop, an overlay which ends at POS is
3535 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3536 we found an overlay which ends before PREV, the remaining
3537 overlays are in correct order. */
3540 XSETMISC (tem
, tail
);
3541 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3544 { /* This overlay is disordered. */
3545 struct Lisp_Overlay
*found
= tail
;
3547 /* Unlink the found overlay. */
3549 parent
->next
= tail
;
3550 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3551 and link it into the right place. */
3554 found
->next
= bp
->overlays_before
;
3555 bp
->overlays_before
= found
;
3559 found
->next
= right_pair
->next
;
3560 right_pair
->next
= found
;
3563 else if (end
== prev
)
3568 else /* No more disordered overlay. */
3573 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3574 doc
: /* Return t if OBJECT is an overlay. */)
3578 return (OVERLAYP (object
) ? Qt
: Qnil
);
3581 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3582 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3583 If omitted, BUFFER defaults to the current buffer.
3584 BEG and END may be integers or markers.
3585 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3586 for the front of the overlay advance when text is inserted there
3587 (which means the text *is not* included in the overlay).
3588 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3589 for the rear of the overlay advance when text is inserted there
3590 (which means the text *is* included in the overlay). */)
3591 (beg
, end
, buffer
, front_advance
, rear_advance
)
3592 Lisp_Object beg
, end
, buffer
;
3593 Lisp_Object front_advance
, rear_advance
;
3595 Lisp_Object overlay
;
3599 XSETBUFFER (buffer
, current_buffer
);
3601 CHECK_BUFFER (buffer
);
3603 && ! EQ (Fmarker_buffer (beg
), buffer
))
3604 error ("Marker points into wrong buffer");
3606 && ! EQ (Fmarker_buffer (end
), buffer
))
3607 error ("Marker points into wrong buffer");
3609 CHECK_NUMBER_COERCE_MARKER (beg
);
3610 CHECK_NUMBER_COERCE_MARKER (end
);
3612 if (XINT (beg
) > XINT (end
))
3615 temp
= beg
; beg
= end
; end
= temp
;
3618 b
= XBUFFER (buffer
);
3620 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3621 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3623 if (!NILP (front_advance
))
3624 XMARKER (beg
)->insertion_type
= 1;
3625 if (!NILP (rear_advance
))
3626 XMARKER (end
)->insertion_type
= 1;
3628 overlay
= allocate_misc ();
3629 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3630 XOVERLAY (overlay
)->start
= beg
;
3631 XOVERLAY (overlay
)->end
= end
;
3632 XOVERLAY (overlay
)->plist
= Qnil
;
3633 XOVERLAY (overlay
)->next
= NULL
;
3635 /* Put the new overlay on the wrong list. */
3636 end
= OVERLAY_END (overlay
);
3637 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3639 if (b
->overlays_after
)
3640 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3641 b
->overlays_after
= XOVERLAY (overlay
);
3645 if (b
->overlays_before
)
3646 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3647 b
->overlays_before
= XOVERLAY (overlay
);
3650 /* This puts it in the right list, and in the right order. */
3651 recenter_overlay_lists (b
, b
->overlay_center
);
3653 /* We don't need to redisplay the region covered by the overlay, because
3654 the overlay has no properties at the moment. */
3659 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3662 modify_overlay (buf
, start
, end
)
3664 EMACS_INT start
, end
;
3673 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3675 /* If this is a buffer not in the selected window,
3676 we must do other windows. */
3677 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3678 windows_or_buffers_changed
= 1;
3679 /* If multiple windows show this buffer, we must do other windows. */
3680 else if (buffer_shared
> 1)
3681 windows_or_buffers_changed
= 1;
3683 ++BUF_OVERLAY_MODIFF (buf
);
3687 Lisp_Object
Fdelete_overlay ();
3689 static struct Lisp_Overlay
*
3690 unchain_overlay (list
, overlay
)
3691 struct Lisp_Overlay
*list
, *overlay
;
3693 struct Lisp_Overlay
*tmp
, *prev
;
3694 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3698 prev
->next
= tmp
->next
;
3701 overlay
->next
= NULL
;
3707 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3708 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3709 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3710 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3712 (overlay
, beg
, end
, buffer
)
3713 Lisp_Object overlay
, beg
, end
, buffer
;
3715 struct buffer
*b
, *ob
;
3716 Lisp_Object obuffer
;
3717 int count
= SPECPDL_INDEX ();
3719 CHECK_OVERLAY (overlay
);
3721 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3723 XSETBUFFER (buffer
, current_buffer
);
3724 CHECK_BUFFER (buffer
);
3727 && ! EQ (Fmarker_buffer (beg
), buffer
))
3728 error ("Marker points into wrong buffer");
3730 && ! EQ (Fmarker_buffer (end
), buffer
))
3731 error ("Marker points into wrong buffer");
3733 CHECK_NUMBER_COERCE_MARKER (beg
);
3734 CHECK_NUMBER_COERCE_MARKER (end
);
3736 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3737 return Fdelete_overlay (overlay
);
3739 if (XINT (beg
) > XINT (end
))
3742 temp
= beg
; beg
= end
; end
= temp
;
3745 specbind (Qinhibit_quit
, Qt
);
3747 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3748 b
= XBUFFER (buffer
);
3749 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3751 /* If the overlay has changed buffers, do a thorough redisplay. */
3752 if (!EQ (buffer
, obuffer
))
3754 /* Redisplay where the overlay was. */
3755 if (!NILP (obuffer
))
3760 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3761 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3763 modify_overlay (ob
, o_beg
, o_end
);
3766 /* Redisplay where the overlay is going to be. */
3767 modify_overlay (b
, XINT (beg
), XINT (end
));
3770 /* Redisplay the area the overlay has just left, or just enclosed. */
3774 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3775 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3777 if (o_beg
== XINT (beg
))
3778 modify_overlay (b
, o_end
, XINT (end
));
3779 else if (o_end
== XINT (end
))
3780 modify_overlay (b
, o_beg
, XINT (beg
));
3783 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3784 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3785 modify_overlay (b
, o_beg
, o_end
);
3789 if (!NILP (obuffer
))
3792 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3794 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3795 eassert (XOVERLAY (overlay
)->next
== NULL
);
3798 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3799 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3801 /* Put the overlay on the wrong list. */
3802 end
= OVERLAY_END (overlay
);
3803 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3805 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3806 b
->overlays_after
= XOVERLAY (overlay
);
3810 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3811 b
->overlays_before
= XOVERLAY (overlay
);
3814 /* This puts it in the right list, and in the right order. */
3815 recenter_overlay_lists (b
, b
->overlay_center
);
3817 return unbind_to (count
, overlay
);
3820 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3821 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3823 Lisp_Object overlay
;
3827 int count
= SPECPDL_INDEX ();
3829 CHECK_OVERLAY (overlay
);
3831 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3835 b
= XBUFFER (buffer
);
3836 specbind (Qinhibit_quit
, Qt
);
3838 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3839 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3840 eassert (XOVERLAY (overlay
)->next
== NULL
);
3842 marker_position (OVERLAY_START (overlay
)),
3843 marker_position (OVERLAY_END (overlay
)));
3844 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3845 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3847 /* When deleting an overlay with before or after strings, turn off
3848 display optimizations for the affected buffer, on the basis that
3849 these strings may contain newlines. This is easier to do than to
3850 check for that situation during redisplay. */
3851 if (!windows_or_buffers_changed
3852 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3853 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3854 b
->prevent_redisplay_optimizations_p
= 1;
3856 return unbind_to (count
, Qnil
);
3859 /* Overlay dissection functions. */
3861 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3862 doc
: /* Return the position at which OVERLAY starts. */)
3864 Lisp_Object overlay
;
3866 CHECK_OVERLAY (overlay
);
3868 return (Fmarker_position (OVERLAY_START (overlay
)));
3871 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3872 doc
: /* Return the position at which OVERLAY ends. */)
3874 Lisp_Object overlay
;
3876 CHECK_OVERLAY (overlay
);
3878 return (Fmarker_position (OVERLAY_END (overlay
)));
3881 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3882 doc
: /* Return the buffer OVERLAY belongs to.
3883 Return nil if OVERLAY has been deleted. */)
3885 Lisp_Object overlay
;
3887 CHECK_OVERLAY (overlay
);
3889 return Fmarker_buffer (OVERLAY_START (overlay
));
3892 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3893 doc
: /* Return a list of the properties on OVERLAY.
3894 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3897 Lisp_Object overlay
;
3899 CHECK_OVERLAY (overlay
);
3901 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3905 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3906 doc
: /* Return a list of the overlays that contain position POS. */)
3911 Lisp_Object
*overlay_vec
;
3915 CHECK_NUMBER_COERCE_MARKER (pos
);
3918 /* We can't use alloca here because overlays_at can call xrealloc. */
3919 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3921 /* Put all the overlays we want in a vector in overlay_vec.
3922 Store the length in len. */
3923 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3924 (int *) 0, (int *) 0, 0);
3926 /* Make a list of them all. */
3927 result
= Flist (noverlays
, overlay_vec
);
3929 xfree (overlay_vec
);
3933 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3934 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3935 Overlap means that at least one character is contained within the overlay
3936 and also contained within the specified region.
3937 Empty overlays are included in the result if they are located at BEG
3938 or between BEG and END. */)
3940 Lisp_Object beg
, end
;
3943 Lisp_Object
*overlay_vec
;
3947 CHECK_NUMBER_COERCE_MARKER (beg
);
3948 CHECK_NUMBER_COERCE_MARKER (end
);
3951 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3953 /* Put all the overlays we want in a vector in overlay_vec.
3954 Store the length in len. */
3955 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3956 (int *) 0, (int *) 0);
3958 /* Make a list of them all. */
3959 result
= Flist (noverlays
, overlay_vec
);
3961 xfree (overlay_vec
);
3965 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3967 doc
: /* Return the next position after POS where an overlay starts or ends.
3968 If there are no more overlay boundaries after POS, return (point-max). */)
3974 Lisp_Object
*overlay_vec
;
3978 CHECK_NUMBER_COERCE_MARKER (pos
);
3981 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3983 /* Put all the overlays we want in a vector in overlay_vec.
3984 Store the length in len.
3985 endpos gets the position where the next overlay starts. */
3986 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3987 &endpos
, (int *) 0, 1);
3989 /* If any of these overlays ends before endpos,
3990 use its ending point instead. */
3991 for (i
= 0; i
< noverlays
; i
++)
3996 oend
= OVERLAY_END (overlay_vec
[i
]);
3997 oendpos
= OVERLAY_POSITION (oend
);
3998 if (oendpos
< endpos
)
4002 xfree (overlay_vec
);
4003 return make_number (endpos
);
4006 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
4007 Sprevious_overlay_change
, 1, 1, 0,
4008 doc
: /* Return the previous position before POS where an overlay starts or ends.
4009 If there are no more overlay boundaries before POS, return (point-min). */)
4015 Lisp_Object
*overlay_vec
;
4018 CHECK_NUMBER_COERCE_MARKER (pos
);
4020 /* At beginning of buffer, we know the answer;
4021 avoid bug subtracting 1 below. */
4022 if (XINT (pos
) == BEGV
)
4026 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4028 /* Put all the overlays we want in a vector in overlay_vec.
4029 Store the length in len.
4030 prevpos gets the position of the previous change. */
4031 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4032 (int *) 0, &prevpos
, 1);
4034 xfree (overlay_vec
);
4035 return make_number (prevpos
);
4038 /* These functions are for debugging overlays. */
4040 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4041 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4042 The car has all the overlays before the overlay center;
4043 the cdr has all the overlays after the overlay center.
4044 Recentering overlays moves overlays between these lists.
4045 The lists you get are copies, so that changing them has no effect.
4046 However, the overlays you get are the real objects that the buffer uses. */)
4049 struct Lisp_Overlay
*ol
;
4050 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4051 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4054 before
= Fcons (tmp
, before
);
4056 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4059 after
= Fcons (tmp
, after
);
4061 return Fcons (Fnreverse (before
), Fnreverse (after
));
4064 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4065 doc
: /* Recenter the overlays of the current buffer around position POS.
4066 That makes overlay lookup faster for positions near POS (but perhaps slower
4067 for positions far away from POS). */)
4071 CHECK_NUMBER_COERCE_MARKER (pos
);
4073 recenter_overlay_lists (current_buffer
, XINT (pos
));
4077 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4078 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4080 Lisp_Object overlay
, prop
;
4082 CHECK_OVERLAY (overlay
);
4083 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4086 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4087 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4088 (overlay
, prop
, value
)
4089 Lisp_Object overlay
, prop
, value
;
4091 Lisp_Object tail
, buffer
;
4094 CHECK_OVERLAY (overlay
);
4096 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4098 for (tail
= XOVERLAY (overlay
)->plist
;
4099 CONSP (tail
) && CONSP (XCDR (tail
));
4100 tail
= XCDR (XCDR (tail
)))
4101 if (EQ (XCAR (tail
), prop
))
4103 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4104 XSETCAR (XCDR (tail
), value
);
4107 /* It wasn't in the list, so add it to the front. */
4108 changed
= !NILP (value
);
4109 XOVERLAY (overlay
)->plist
4110 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4112 if (! NILP (buffer
))
4115 modify_overlay (XBUFFER (buffer
),
4116 marker_position (OVERLAY_START (overlay
)),
4117 marker_position (OVERLAY_END (overlay
)));
4118 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4119 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4120 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4121 Fdelete_overlay (overlay
);
4126 /* Subroutine of report_overlay_modification. */
4128 /* Lisp vector holding overlay hook functions to call.
4129 Vector elements come in pairs.
4130 Each even-index element is a list of hook functions.
4131 The following odd-index element is the overlay they came from.
4133 Before the buffer change, we fill in this vector
4134 as we call overlay hook functions.
4135 After the buffer change, we get the functions to call from this vector.
4136 This way we always call the same functions before and after the change. */
4137 static Lisp_Object last_overlay_modification_hooks
;
4139 /* Number of elements actually used in last_overlay_modification_hooks. */
4140 static int last_overlay_modification_hooks_used
;
4142 /* Add one functionlist/overlay pair
4143 to the end of last_overlay_modification_hooks. */
4146 add_overlay_mod_hooklist (functionlist
, overlay
)
4147 Lisp_Object functionlist
, overlay
;
4149 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4151 if (last_overlay_modification_hooks_used
== oldsize
)
4154 old
= last_overlay_modification_hooks
;
4155 last_overlay_modification_hooks
4156 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
4157 bcopy (XVECTOR (old
)->contents
,
4158 XVECTOR (last_overlay_modification_hooks
)->contents
,
4159 sizeof (Lisp_Object
) * oldsize
);
4161 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = functionlist
;
4162 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = overlay
;
4165 /* Run the modification-hooks of overlays that include
4166 any part of the text in START to END.
4167 If this change is an insertion, also
4168 run the insert-before-hooks of overlay starting at END,
4169 and the insert-after-hooks of overlay ending at START.
4171 This is called both before and after the modification.
4172 AFTER is nonzero when we call after the modification.
4174 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4175 When AFTER is nonzero, they are the start position,
4176 the position after the inserted new text,
4177 and the length of deleted or replaced old text. */
4180 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4181 Lisp_Object start
, end
;
4183 Lisp_Object arg1
, arg2
, arg3
;
4185 Lisp_Object prop
, overlay
;
4186 struct Lisp_Overlay
*tail
;
4187 /* 1 if this change is an insertion. */
4188 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4189 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4194 /* We used to run the functions as soon as we found them and only register
4195 them in last_overlay_modification_hooks for the purpose of the `after'
4196 case. But running elisp code as we traverse the list of overlays is
4197 painful because the list can be modified by the elisp code so we had to
4198 copy at several places. We now simply do a read-only traversal that
4199 only collects the functions to run and we run them afterwards. It's
4200 simpler, especially since all the code was already there. -stef */
4204 /* We are being called before a change.
4205 Scan the overlays to find the functions to call. */
4206 last_overlay_modification_hooks_used
= 0;
4207 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4209 int startpos
, endpos
;
4210 Lisp_Object ostart
, oend
;
4212 XSETMISC (overlay
, tail
);
4214 ostart
= OVERLAY_START (overlay
);
4215 oend
= OVERLAY_END (overlay
);
4216 endpos
= OVERLAY_POSITION (oend
);
4217 if (XFASTINT (start
) > endpos
)
4219 startpos
= OVERLAY_POSITION (ostart
);
4220 if (insertion
&& (XFASTINT (start
) == startpos
4221 || XFASTINT (end
) == startpos
))
4223 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4225 add_overlay_mod_hooklist (prop
, overlay
);
4227 if (insertion
&& (XFASTINT (start
) == endpos
4228 || XFASTINT (end
) == endpos
))
4230 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4232 add_overlay_mod_hooklist (prop
, overlay
);
4234 /* Test for intersecting intervals. This does the right thing
4235 for both insertion and deletion. */
4236 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4238 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4240 add_overlay_mod_hooklist (prop
, overlay
);
4244 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4246 int startpos
, endpos
;
4247 Lisp_Object ostart
, oend
;
4249 XSETMISC (overlay
, tail
);
4251 ostart
= OVERLAY_START (overlay
);
4252 oend
= OVERLAY_END (overlay
);
4253 startpos
= OVERLAY_POSITION (ostart
);
4254 endpos
= OVERLAY_POSITION (oend
);
4255 if (XFASTINT (end
) < startpos
)
4257 if (insertion
&& (XFASTINT (start
) == startpos
4258 || XFASTINT (end
) == startpos
))
4260 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4262 add_overlay_mod_hooklist (prop
, overlay
);
4264 if (insertion
&& (XFASTINT (start
) == endpos
4265 || XFASTINT (end
) == endpos
))
4267 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4269 add_overlay_mod_hooklist (prop
, overlay
);
4271 /* Test for intersecting intervals. This does the right thing
4272 for both insertion and deletion. */
4273 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4275 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4277 add_overlay_mod_hooklist (prop
, overlay
);
4282 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4284 /* Call the functions recorded in last_overlay_modification_hooks.
4285 First copy the vector contents, in case some of these hooks
4286 do subsequent modification of the buffer. */
4287 int size
= last_overlay_modification_hooks_used
;
4288 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4291 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4292 copy
, size
* sizeof (Lisp_Object
));
4294 gcpro1
.nvars
= size
;
4296 for (i
= 0; i
< size
;)
4298 Lisp_Object prop
, overlay
;
4300 overlay
= copy
[i
++];
4301 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4308 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4309 Lisp_Object list
, overlay
;
4311 Lisp_Object arg1
, arg2
, arg3
;
4313 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4315 GCPRO4 (list
, arg1
, arg2
, arg3
);
4317 while (CONSP (list
))
4320 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4322 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4328 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4331 evaporate_overlays (pos
)
4334 Lisp_Object overlay
, hit_list
;
4335 struct Lisp_Overlay
*tail
;
4338 if (pos
<= current_buffer
->overlay_center
)
4339 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4342 XSETMISC (overlay
, tail
);
4343 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4346 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4347 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4348 hit_list
= Fcons (overlay
, hit_list
);
4351 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4354 XSETMISC (overlay
, tail
);
4355 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4358 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4359 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4360 hit_list
= Fcons (overlay
, hit_list
);
4362 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4363 Fdelete_overlay (XCAR (hit_list
));
4366 /* Somebody has tried to store a value with an unacceptable type
4367 in the slot with offset OFFSET. */
4370 buffer_slot_type_mismatch (offset
)
4376 switch (XINT (PER_BUFFER_TYPE (offset
)))
4379 type_name
= "integers";
4383 type_name
= "strings";
4387 type_name
= "symbols";
4394 sym
= PER_BUFFER_SYMBOL (offset
);
4395 error ("Only %s should be stored in the buffer-local variable %s",
4396 type_name
, SDATA (SYMBOL_NAME (sym
)));
4400 /***********************************************************************
4401 Allocation with mmap
4402 ***********************************************************************/
4404 #ifdef USE_MMAP_FOR_BUFFERS
4406 #include <sys/types.h>
4407 #include <sys/mman.h>
4410 #ifdef MAP_ANONYMOUS
4411 #define MAP_ANON MAP_ANONYMOUS
4418 #define MAP_FAILED ((void *) -1)
4431 /* Memory is allocated in regions which are mapped using mmap(2).
4432 The current implementation lets the system select mapped
4433 addresses; we're not using MAP_FIXED in general, except when
4434 trying to enlarge regions.
4436 Each mapped region starts with a mmap_region structure, the user
4437 area starts after that structure, aligned to MEM_ALIGN.
4439 +-----------------------+
4440 | struct mmap_info + |
4442 +-----------------------+
4446 +-----------------------+ */
4450 /* User-specified size. */
4451 size_t nbytes_specified
;
4453 /* Number of bytes mapped */
4454 size_t nbytes_mapped
;
4456 /* Pointer to the location holding the address of the memory
4457 allocated with the mmap'd block. The variable actually points
4458 after this structure. */
4461 /* Next and previous in list of all mmap'd regions. */
4462 struct mmap_region
*next
, *prev
;
4465 /* Doubly-linked list of mmap'd regions. */
4467 static struct mmap_region
*mmap_regions
;
4469 /* File descriptor for mmap. If we don't have anonymous mapping,
4470 /dev/zero will be opened on it. */
4474 /* Temporary storage for mmap_set_vars, see there. */
4476 static struct mmap_region
*mmap_regions_1
;
4477 static int mmap_fd_1
;
4479 /* Page size on this system. */
4481 static int mmap_page_size
;
4483 /* 1 means mmap has been intialized. */
4485 static int mmap_initialized_p
;
4487 /* Value is X rounded up to the next multiple of N. */
4489 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4491 /* Size of mmap_region structure plus padding. */
4493 #define MMAP_REGION_STRUCT_SIZE \
4494 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4496 /* Given a pointer P to the start of the user-visible part of a mapped
4497 region, return a pointer to the start of the region. */
4499 #define MMAP_REGION(P) \
4500 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4502 /* Given a pointer P to the start of a mapped region, return a pointer
4503 to the start of the user-visible part of the region. */
4505 #define MMAP_USER_AREA(P) \
4506 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4508 #define MEM_ALIGN sizeof (double)
4510 /* Predicate returning true if part of the address range [START .. END]
4511 is currently mapped. Used to prevent overwriting an existing
4514 Default is to conservativly assume the address range is occupied by
4515 something else. This can be overridden by system configuration
4516 files if system-specific means to determine this exists. */
4518 #ifndef MMAP_ALLOCATED_P
4519 #define MMAP_ALLOCATED_P(start, end) 1
4522 /* Function prototypes. */
4524 static int mmap_free_1
P_ ((struct mmap_region
*));
4525 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4526 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4527 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4528 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4529 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4530 static void mmap_init
P_ ((void));
4533 /* Return a region overlapping address range START...END, or null if
4534 none. END is not including, i.e. the last byte in the range
4537 static struct mmap_region
*
4538 mmap_find (start
, end
)
4539 POINTER_TYPE
*start
, *end
;
4541 struct mmap_region
*r
;
4542 char *s
= (char *) start
, *e
= (char *) end
;
4544 for (r
= mmap_regions
; r
; r
= r
->next
)
4546 char *rstart
= (char *) r
;
4547 char *rend
= rstart
+ r
->nbytes_mapped
;
4549 if (/* First byte of range, i.e. START, in this region? */
4550 (s
>= rstart
&& s
< rend
)
4551 /* Last byte of range, i.e. END - 1, in this region? */
4552 || (e
> rstart
&& e
<= rend
)
4553 /* First byte of this region in the range? */
4554 || (rstart
>= s
&& rstart
< e
)
4555 /* Last byte of this region in the range? */
4556 || (rend
> s
&& rend
<= e
))
4564 /* Unmap a region. P is a pointer to the start of the user-araa of
4565 the region. Value is non-zero if successful. */
4569 struct mmap_region
*r
;
4572 r
->next
->prev
= r
->prev
;
4574 r
->prev
->next
= r
->next
;
4576 mmap_regions
= r
->next
;
4578 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4580 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4588 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4589 Value is non-zero if successful. */
4592 mmap_enlarge (r
, npages
)
4593 struct mmap_region
*r
;
4596 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4602 /* Unmap pages at the end of the region. */
4603 nbytes
= - npages
* mmap_page_size
;
4604 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4605 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4608 r
->nbytes_mapped
-= nbytes
;
4612 else if (npages
> 0)
4614 nbytes
= npages
* mmap_page_size
;
4616 /* Try to map additional pages at the end of the region. We
4617 cannot do this if the address range is already occupied by
4618 something else because mmap deletes any previous mapping.
4619 I'm not sure this is worth doing, let's see. */
4620 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4624 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4625 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4626 if (p
== MAP_FAILED
)
4627 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4628 else if (p
!= (POINTER_TYPE
*) region_end
)
4630 /* Kernels are free to choose a different address. In
4631 that case, unmap what we've mapped above; we have
4633 if (munmap (p
, nbytes
) == -1)
4634 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4638 r
->nbytes_mapped
+= nbytes
;
4648 /* Set or reset variables holding references to mapped regions. If
4649 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4650 non-zero, set all variables to the start of the user-areas
4653 This function is called from Fdump_emacs to ensure that the dumped
4654 Emacs doesn't contain references to memory that won't be mapped
4655 when Emacs starts. */
4658 mmap_set_vars (restore_p
)
4661 struct mmap_region
*r
;
4665 mmap_regions
= mmap_regions_1
;
4666 mmap_fd
= mmap_fd_1
;
4667 for (r
= mmap_regions
; r
; r
= r
->next
)
4668 *r
->var
= MMAP_USER_AREA (r
);
4672 for (r
= mmap_regions
; r
; r
= r
->next
)
4674 mmap_regions_1
= mmap_regions
;
4675 mmap_regions
= NULL
;
4676 mmap_fd_1
= mmap_fd
;
4682 /* Allocate a block of storage large enough to hold NBYTES bytes of
4683 data. A pointer to the data is returned in *VAR. VAR is thus the
4684 address of some variable which will use the data area.
4686 The allocation of 0 bytes is valid.
4688 If we can't allocate the necessary memory, set *VAR to null, and
4691 static POINTER_TYPE
*
4692 mmap_alloc (var
, nbytes
)
4701 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4702 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4705 if (p
== MAP_FAILED
)
4707 if (errno
!= ENOMEM
)
4708 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4713 struct mmap_region
*r
= (struct mmap_region
*) p
;
4715 r
->nbytes_specified
= nbytes
;
4716 r
->nbytes_mapped
= map
;
4719 r
->next
= mmap_regions
;
4724 p
= MMAP_USER_AREA (p
);
4731 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4732 resize it to size NBYTES. Change *VAR to reflect the new block,
4733 and return this value. If more memory cannot be allocated, then
4734 leave *VAR unchanged, and return null. */
4736 static POINTER_TYPE
*
4737 mmap_realloc (var
, nbytes
)
4741 POINTER_TYPE
*result
;
4746 result
= mmap_alloc (var
, nbytes
);
4747 else if (nbytes
== 0)
4750 result
= mmap_alloc (var
, nbytes
);
4754 struct mmap_region
*r
= MMAP_REGION (*var
);
4755 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4760 POINTER_TYPE
*old_ptr
= *var
;
4762 /* Try to map additional pages at the end of the region.
4763 If that fails, allocate a new region, copy data
4764 from the old region, then free it. */
4765 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4768 r
->nbytes_specified
= nbytes
;
4769 *var
= result
= old_ptr
;
4771 else if (mmap_alloc (var
, nbytes
))
4773 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4774 mmap_free_1 (MMAP_REGION (old_ptr
));
4776 r
= MMAP_REGION (result
);
4777 r
->nbytes_specified
= nbytes
;
4785 else if (room
- nbytes
>= mmap_page_size
)
4787 /* Shrinking by at least a page. Let's give some
4788 memory back to the system.
4790 The extra parens are to make the division happens first,
4791 on positive values, so we know it will round towards
4793 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4795 r
->nbytes_specified
= nbytes
;
4799 /* Leave it alone. */
4801 r
->nbytes_specified
= nbytes
;
4809 /* Free a block of relocatable storage whose data is pointed to by
4810 PTR. Store 0 in *PTR to show there's no block allocated. */
4820 mmap_free_1 (MMAP_REGION (*var
));
4826 /* Perform necessary intializations for the use of mmap. */
4832 /* The value of mmap_fd is initially 0 in temacs, and -1
4833 in a dumped Emacs. */
4836 /* No anonymous mmap -- we need the file descriptor. */
4837 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4839 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4841 #endif /* MAP_ANON == 0 */
4843 if (mmap_initialized_p
)
4845 mmap_initialized_p
= 1;
4851 mmap_page_size
= getpagesize ();
4854 #endif /* USE_MMAP_FOR_BUFFERS */
4858 /***********************************************************************
4859 Buffer-text Allocation
4860 ***********************************************************************/
4863 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4864 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4865 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4866 #endif /* REL_ALLOC */
4869 /* Allocate NBYTES bytes for buffer B's text buffer. */
4872 alloc_buffer_text (b
, nbytes
)
4879 #if defined USE_MMAP_FOR_BUFFERS
4880 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4881 #elif defined REL_ALLOC
4882 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4884 p
= xmalloc (nbytes
);
4893 b
->text
->beg
= (unsigned char *) p
;
4897 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4901 enlarge_buffer_text (b
, delta
)
4906 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4909 #if defined USE_MMAP_FOR_BUFFERS
4910 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4911 #elif defined REL_ALLOC
4912 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4914 p
= xrealloc (b
->text
->beg
, nbytes
);
4923 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4928 /* Free buffer B's text buffer. */
4931 free_buffer_text (b
)
4936 #if defined USE_MMAP_FOR_BUFFERS
4937 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4938 #elif defined REL_ALLOC
4939 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4941 xfree (b
->text
->beg
);
4944 BUF_BEG_ADDR (b
) = NULL
;
4950 /***********************************************************************
4952 ***********************************************************************/
4959 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4961 /* Make sure all markable slots in buffer_defaults
4962 are initialized reasonably, so mark_buffer won't choke. */
4963 reset_buffer (&buffer_defaults
);
4964 reset_buffer_local_variables (&buffer_defaults
, 1);
4965 reset_buffer (&buffer_local_symbols
);
4966 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4967 /* Prevent GC from getting confused. */
4968 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4969 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4970 BUF_INTERVALS (&buffer_defaults
) = 0;
4971 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4972 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4973 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4975 /* Set up the default values of various buffer slots. */
4976 /* Must do these before making the first buffer! */
4978 /* real setup is done in bindings.el */
4979 buffer_defaults
.mode_line_format
= build_string ("%-");
4980 buffer_defaults
.header_line_format
= Qnil
;
4981 buffer_defaults
.abbrev_mode
= Qnil
;
4982 buffer_defaults
.overwrite_mode
= Qnil
;
4983 buffer_defaults
.case_fold_search
= Qt
;
4984 buffer_defaults
.auto_fill_function
= Qnil
;
4985 buffer_defaults
.selective_display
= Qnil
;
4987 buffer_defaults
.selective_display_ellipses
= Qt
;
4989 buffer_defaults
.abbrev_table
= Qnil
;
4990 buffer_defaults
.display_table
= Qnil
;
4991 buffer_defaults
.undo_list
= Qnil
;
4992 buffer_defaults
.mark_active
= Qnil
;
4993 buffer_defaults
.file_format
= Qnil
;
4994 buffer_defaults
.auto_save_file_format
= Qt
;
4995 buffer_defaults
.overlays_before
= NULL
;
4996 buffer_defaults
.overlays_after
= NULL
;
4997 buffer_defaults
.overlay_center
= BEG
;
4999 XSETFASTINT (buffer_defaults
.tab_width
, 8);
5000 buffer_defaults
.truncate_lines
= Qnil
;
5001 buffer_defaults
.ctl_arrow
= Qt
;
5002 buffer_defaults
.direction_reversed
= Qnil
;
5003 buffer_defaults
.cursor_type
= Qt
;
5004 buffer_defaults
.extra_line_spacing
= Qnil
;
5005 buffer_defaults
.cursor_in_non_selected_windows
= Qt
;
5008 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
5010 buffer_defaults
.enable_multibyte_characters
= Qt
;
5011 buffer_defaults
.buffer_file_coding_system
= Qnil
;
5012 XSETFASTINT (buffer_defaults
.fill_column
, 70);
5013 XSETFASTINT (buffer_defaults
.left_margin
, 0);
5014 buffer_defaults
.cache_long_line_scans
= Qnil
;
5015 buffer_defaults
.file_truename
= Qnil
;
5016 XSETFASTINT (buffer_defaults
.display_count
, 0);
5017 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
5018 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
5019 buffer_defaults
.left_fringe_width
= Qnil
;
5020 buffer_defaults
.right_fringe_width
= Qnil
;
5021 buffer_defaults
.fringes_outside_margins
= Qnil
;
5022 buffer_defaults
.scroll_bar_width
= Qnil
;
5023 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
5024 buffer_defaults
.indicate_empty_lines
= Qnil
;
5025 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
5026 buffer_defaults
.fringe_indicator_alist
= Qnil
;
5027 buffer_defaults
.fringe_cursor_alist
= Qnil
;
5028 buffer_defaults
.scroll_up_aggressively
= Qnil
;
5029 buffer_defaults
.scroll_down_aggressively
= Qnil
;
5030 buffer_defaults
.display_time
= Qnil
;
5032 /* Assign the local-flags to the slots that have default values.
5033 The local flag is a bit that is used in the buffer
5034 to say that it has its own local value for the slot.
5035 The local flag bits are in the local_var_flags slot of the buffer. */
5037 /* Nothing can work if this isn't true */
5038 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
5040 /* 0 means not a lisp var, -1 means always local, else mask */
5041 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
5042 XSETINT (buffer_local_flags
.filename
, -1);
5043 XSETINT (buffer_local_flags
.directory
, -1);
5044 XSETINT (buffer_local_flags
.backed_up
, -1);
5045 XSETINT (buffer_local_flags
.save_length
, -1);
5046 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
5047 XSETINT (buffer_local_flags
.read_only
, -1);
5048 XSETINT (buffer_local_flags
.major_mode
, -1);
5049 XSETINT (buffer_local_flags
.mode_name
, -1);
5050 XSETINT (buffer_local_flags
.undo_list
, -1);
5051 XSETINT (buffer_local_flags
.mark_active
, -1);
5052 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
5053 XSETINT (buffer_local_flags
.file_truename
, -1);
5054 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
5055 XSETINT (buffer_local_flags
.file_format
, -1);
5056 XSETINT (buffer_local_flags
.auto_save_file_format
, -1);
5057 XSETINT (buffer_local_flags
.display_count
, -1);
5058 XSETINT (buffer_local_flags
.display_time
, -1);
5059 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
5062 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
5063 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
5064 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5065 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5066 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5067 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5069 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5071 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5072 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5073 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5074 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5075 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5076 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5077 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5079 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5080 /* Make this one a permanent local. */
5081 buffer_permanent_local_flags
[idx
++] = 1;
5083 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5084 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5085 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5086 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
5087 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5088 /* Make this one a permanent local. */
5089 buffer_permanent_local_flags
[idx
++] = 1;
5090 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5091 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5092 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5093 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5094 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5095 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5096 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5097 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5098 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5099 XSETFASTINT (buffer_local_flags
.fringe_indicator_alist
, idx
); ++idx
;
5100 XSETFASTINT (buffer_local_flags
.fringe_cursor_alist
, idx
); ++idx
;
5101 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5102 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5103 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5104 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5105 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5106 XSETFASTINT (buffer_local_flags
.cursor_in_non_selected_windows
, idx
); ++idx
;
5108 /* Need more room? */
5109 if (idx
>= MAX_PER_BUFFER_VARS
)
5111 last_per_buffer_idx
= idx
;
5113 Vbuffer_alist
= Qnil
;
5117 QSFundamental
= build_string ("Fundamental");
5119 Qfundamental_mode
= intern ("fundamental-mode");
5120 buffer_defaults
.major_mode
= Qfundamental_mode
;
5122 Qmode_class
= intern ("mode-class");
5124 Qprotected_field
= intern ("protected-field");
5126 Qpermanent_local
= intern ("permanent-local");
5128 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5129 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5131 Qucs_set_table_for_input
= intern ("ucs-set-table-for-input");
5133 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
5135 /* super-magic invisible buffer */
5136 Vbuffer_alist
= Qnil
;
5138 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5140 inhibit_modification_hooks
= 0;
5150 #ifdef USE_MMAP_FOR_BUFFERS
5152 /* When using the ralloc implementation based on mmap(2), buffer
5153 text pointers will have been set to null in the dumped Emacs.
5157 for (b
= all_buffers
; b
; b
= b
->next
)
5158 if (b
->text
->beg
== NULL
)
5159 enlarge_buffer_text (b
, 0);
5161 #endif /* USE_MMAP_FOR_BUFFERS */
5163 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5164 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5165 Fset_buffer_multibyte (Qnil
);
5167 pwd
= get_current_dir_name ();
5170 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5173 /* Maybe this should really use some standard subroutine
5174 whose definition is filename syntax dependent. */
5176 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5178 /* Grow buffer to add directory separator and '\0'. */
5179 pwd
= (char *) xrealloc (pwd
, len
+ 2);
5180 pwd
[len
] = DIRECTORY_SEP
;
5181 pwd
[len
+ 1] = '\0';
5183 #endif /* not VMS */
5185 current_buffer
->directory
= make_unibyte_string (pwd
, strlen (pwd
));
5186 if (! NILP (buffer_defaults
.enable_multibyte_characters
))
5187 /* At this moment, we still don't know how to decode the
5188 directory name. So, we keep the bytes in multibyte form so
5189 that ENCODE_FILE correctly gets the original bytes. */
5190 current_buffer
->directory
5191 = string_to_multibyte (current_buffer
->directory
);
5193 /* Add /: to the front of the name
5194 if it would otherwise be treated as magic. */
5195 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5197 /* If the default dir is just /, TEMP is non-nil
5198 because of the ange-ftp completion handler.
5199 However, it is not necessary to turn / into /:/.
5200 So avoid doing that. */
5201 && strcmp ("/", SDATA (current_buffer
->directory
)))
5202 current_buffer
->directory
5203 = concat2 (build_string ("/:"), current_buffer
->directory
);
5205 temp
= get_minibuffer (0);
5206 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5211 /* initialize the buffer routines */
5215 staticpro (&last_overlay_modification_hooks
);
5216 last_overlay_modification_hooks
5217 = Fmake_vector (make_number (10), Qnil
);
5219 staticpro (&Vbuffer_defaults
);
5220 staticpro (&Vbuffer_local_symbols
);
5221 staticpro (&Qfundamental_mode
);
5222 staticpro (&Qmode_class
);
5223 staticpro (&QSFundamental
);
5224 staticpro (&Vbuffer_alist
);
5225 staticpro (&Qprotected_field
);
5226 staticpro (&Qpermanent_local
);
5227 staticpro (&Qkill_buffer_hook
);
5228 Qoverlayp
= intern ("overlayp");
5229 staticpro (&Qoverlayp
);
5230 Qevaporate
= intern ("evaporate");
5231 staticpro (&Qevaporate
);
5232 Qmodification_hooks
= intern ("modification-hooks");
5233 staticpro (&Qmodification_hooks
);
5234 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5235 staticpro (&Qinsert_in_front_hooks
);
5236 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5237 staticpro (&Qinsert_behind_hooks
);
5238 Qget_file_buffer
= intern ("get-file-buffer");
5239 staticpro (&Qget_file_buffer
);
5240 Qpriority
= intern ("priority");
5241 staticpro (&Qpriority
);
5242 Qwindow
= intern ("window");
5243 staticpro (&Qwindow
);
5244 Qbefore_string
= intern ("before-string");
5245 staticpro (&Qbefore_string
);
5246 Qafter_string
= intern ("after-string");
5247 staticpro (&Qafter_string
);
5248 Qfirst_change_hook
= intern ("first-change-hook");
5249 staticpro (&Qfirst_change_hook
);
5250 Qbefore_change_functions
= intern ("before-change-functions");
5251 staticpro (&Qbefore_change_functions
);
5252 Qafter_change_functions
= intern ("after-change-functions");
5253 staticpro (&Qafter_change_functions
);
5254 staticpro (&Qucs_set_table_for_input
);
5256 Qkill_buffer_query_functions
= intern ("kill-buffer-query-functions");
5257 staticpro (&Qkill_buffer_query_functions
);
5259 Fput (Qprotected_field
, Qerror_conditions
,
5260 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5261 Fput (Qprotected_field
, Qerror_message
,
5262 build_string ("Attempt to modify a protected field"));
5264 /* All these use DEFVAR_LISP_NOPRO because the slots in
5265 buffer_defaults will all be marked via Vbuffer_defaults. */
5267 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5268 &buffer_defaults
.mode_line_format
,
5269 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5270 This is the same as (default-value 'mode-line-format). */);
5272 DEFVAR_LISP_NOPRO ("default-header-line-format",
5273 &buffer_defaults
.header_line_format
,
5274 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5275 This is the same as (default-value 'header-line-format). */);
5277 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5278 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5279 This is the same as (default-value 'cursor-type). */);
5281 DEFVAR_LISP_NOPRO ("default-line-spacing",
5282 &buffer_defaults
.extra_line_spacing
,
5283 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5284 This is the same as (default-value 'line-spacing). */);
5286 DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows",
5287 &buffer_defaults
.cursor_in_non_selected_windows
,
5288 doc
: /* Default value of `cursor-in-non-selected-windows'.
5289 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5291 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5292 &buffer_defaults
.abbrev_mode
,
5293 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5294 This is the same as (default-value 'abbrev-mode). */);
5296 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5297 &buffer_defaults
.ctl_arrow
,
5298 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5299 This is the same as (default-value 'ctl-arrow). */);
5301 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5302 &buffer_defaults
.direction_reversed
,
5303 doc
: /* Default value of `direction-reversed' for buffers that do not override it.
5304 This is the same as (default-value 'direction-reversed). */);
5306 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5307 &buffer_defaults
.enable_multibyte_characters
,
5308 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5309 This is the same as (default-value 'enable-multibyte-characters). */);
5311 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5312 &buffer_defaults
.buffer_file_coding_system
,
5313 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5314 This is the same as (default-value 'buffer-file-coding-system). */);
5316 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5317 &buffer_defaults
.truncate_lines
,
5318 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5319 This is the same as (default-value 'truncate-lines). */);
5321 DEFVAR_LISP_NOPRO ("default-fill-column",
5322 &buffer_defaults
.fill_column
,
5323 doc
: /* Default value of `fill-column' for buffers that do not override it.
5324 This is the same as (default-value 'fill-column). */);
5326 DEFVAR_LISP_NOPRO ("default-left-margin",
5327 &buffer_defaults
.left_margin
,
5328 doc
: /* Default value of `left-margin' for buffers that do not override it.
5329 This is the same as (default-value 'left-margin). */);
5331 DEFVAR_LISP_NOPRO ("default-tab-width",
5332 &buffer_defaults
.tab_width
,
5333 doc
: /* Default value of `tab-width' for buffers that do not override it.
5334 This is the same as (default-value 'tab-width). */);
5336 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5337 &buffer_defaults
.case_fold_search
,
5338 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5339 This is the same as (default-value 'case-fold-search). */);
5342 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5343 &buffer_defaults
.buffer_file_type
,
5344 doc
: /* Default file type for buffers that do not override it.
5345 This is the same as (default-value 'buffer-file-type).
5346 The file type is nil for text, t for binary. */);
5349 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5350 &buffer_defaults
.left_margin_cols
,
5351 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5352 This is the same as (default-value 'left-margin-width). */);
5354 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5355 &buffer_defaults
.right_margin_cols
,
5356 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5357 This is the same as (default-value 'right-margin-width). */);
5359 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5360 &buffer_defaults
.left_fringe_width
,
5361 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5362 This is the same as (default-value 'left-fringe-width). */);
5364 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5365 &buffer_defaults
.right_fringe_width
,
5366 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5367 This is the same as (default-value 'right-fringe-width). */);
5369 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5370 &buffer_defaults
.fringes_outside_margins
,
5371 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5372 This is the same as (default-value 'fringes-outside-margins). */);
5374 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5375 &buffer_defaults
.scroll_bar_width
,
5376 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5377 This is the same as (default-value 'scroll-bar-width). */);
5379 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5380 &buffer_defaults
.vertical_scroll_bar_type
,
5381 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5382 This is the same as (default-value 'vertical-scroll-bar). */);
5384 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5385 &buffer_defaults
.indicate_empty_lines
,
5386 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5387 This is the same as (default-value 'indicate-empty-lines). */);
5389 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5390 &buffer_defaults
.indicate_buffer_boundaries
,
5391 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5392 This is the same as (default-value 'indicate-buffer-boundaries). */);
5394 DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist",
5395 &buffer_defaults
.fringe_indicator_alist
,
5396 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5397 This is the same as (default-value 'fringe-indicator-alist'). */);
5399 DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist",
5400 &buffer_defaults
.fringe_cursor_alist
,
5401 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5402 This is the same as (default-value 'fringe-cursor-alist'). */);
5404 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5405 &buffer_defaults
.scroll_up_aggressively
,
5406 doc
: /* Default value of `scroll-up-aggressively'.
5407 This value applies in buffers that don't have their own local values.
5408 This variable is an alias for (default-value 'scroll-up-aggressively). */);
5410 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5411 &buffer_defaults
.scroll_down_aggressively
,
5412 doc
: /* Default value of `scroll-down-aggressively'.
5413 This value applies in buffers that don't have their own local values.
5414 This variable is an alias for (default-value 'scroll-down-aggressively). */);
5416 DEFVAR_PER_BUFFER ("header-line-format",
5417 ¤t_buffer
->header_line_format
,
5419 doc
: /* Analogous to `mode-line-format', but controls the header line.
5420 The header line appears, optionally, at the top of a window;
5421 the mode line appears at the bottom. */);
5423 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5425 doc
: /* Template for displaying mode line for current buffer.
5426 Each buffer has its own value of this variable.
5427 Value may be nil, a string, a symbol or a list or cons cell.
5428 A value of nil means don't display a mode line.
5429 For a symbol, its value is used (but it is ignored if t or nil).
5430 A string appearing directly as the value of a symbol is processed verbatim
5431 in that the %-constructs below are not recognized.
5432 Note that unless the symbol is marked as a `risky-local-variable', all
5433 properties in any strings, as well as all :eval and :propertize forms
5434 in the value of that symbol will be ignored.
5435 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5436 is used as a mode line element. Be careful--FORM should not load any files,
5437 because that can cause an infinite recursion.
5438 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5439 with the specified properties PROPS applied.
5440 For a list whose car is a symbol, the symbol's value is taken,
5441 and if that is non-nil, the cadr of the list is processed recursively.
5442 Otherwise, the caddr of the list (if there is one) is processed.
5443 For a list whose car is a string or list, each element is processed
5444 recursively and the results are effectively concatenated.
5445 For a list whose car is an integer, the cdr of the list is processed
5446 and padded (if the number is positive) or truncated (if negative)
5447 to the width specified by that number.
5448 A string is printed verbatim in the mode line except for %-constructs:
5449 (%-constructs are allowed when the string is the entire mode-line-format
5450 or when it is found in a cons-cell or a list)
5451 %b -- print buffer name. %f -- print visited file name.
5452 %F -- print frame name.
5453 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5454 %& is like %*, but ignore read-only-ness.
5455 % means buffer is read-only and * means it is modified.
5456 For a modified read-only buffer, %* gives % and %+ gives *.
5457 %s -- print process status. %l -- print the current line number.
5458 %c -- print the current column number (this makes editing slower).
5459 To make the column number update correctly in all cases,
5460 `column-number-mode' must be non-nil.
5461 %i -- print the size of the buffer.
5462 %I -- like %i, but use k, M, G, etc., to abbreviate.
5463 %p -- print percent of buffer above top of window, or Top, Bot or All.
5464 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5465 or print Bottom or All.
5466 %m -- print the mode name.
5467 %n -- print Narrow if appropriate.
5468 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5469 %Z -- like %z, but including the end-of-line format.
5470 %[ -- print one [ for each recursive editing level. %] similar.
5471 %% -- print %. %- -- print infinitely many dashes.
5472 Decimal digits after the % specify field width to which to pad. */);
5474 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5475 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5476 nil here means use current buffer's major mode, provided it is not
5477 marked as "special".
5479 When a mode is used by default, `find-file' switches to it
5480 before it reads the contents into the buffer and before
5481 it finishes setting up the buffer. Thus, the mode and
5482 its hooks should not expect certain variables such as
5483 `buffer-read-only' and `buffer-file-coding-system' to be set up. */);
5485 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5486 make_number (Lisp_Symbol
),
5487 doc
: /* Symbol for current buffer's major mode. */);
5489 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5491 doc
: /* Pretty name of current buffer's major mode (a string). */);
5493 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5494 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5496 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5498 doc
: /* *Non-nil if searches and matches should ignore case. */);
5500 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5501 make_number (Lisp_Int
),
5502 doc
: /* *Column beyond which automatic line-wrapping should happen.
5503 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5505 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5506 make_number (Lisp_Int
),
5507 doc
: /* *Column for the default indent-line-function to indent to.
5508 Linefeed indents to this column in Fundamental mode. */);
5510 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5511 make_number (Lisp_Int
),
5512 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5514 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5515 doc
: /* *Non-nil means display control chars with uparrow.
5516 A value of nil means use backslash and octal digits.
5517 This variable does not apply to characters whose display is specified
5518 in the current display table (if there is one). */);
5520 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5521 ¤t_buffer
->enable_multibyte_characters
,
5523 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5524 Otherwise they are regarded as unibyte. This affects the display,
5525 file I/O and the behavior of various editing commands.
5527 This variable is buffer-local but you cannot set it directly;
5528 use the function `set-buffer-multibyte' to change a buffer's representation.
5529 Changing its default value with `setq-default' is supported.
5530 See also variable `default-enable-multibyte-characters' and Info node
5531 `(elisp)Text Representations'. */);
5532 XSYMBOL (intern ("enable-multibyte-characters"))->constant
= 1;
5534 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5535 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5536 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5537 This variable applies to saving the buffer, and also to `write-region'
5538 and other functions that use `write-region'.
5539 It does not apply to sending output to subprocesses, however.
5541 If this is nil, the buffer is saved without any code conversion
5542 unless some coding system is specified in `file-coding-system-alist'
5543 for the buffer file.
5545 If the text to be saved cannot be encoded as specified by this variable,
5546 an alternative encoding is selected by `select-safe-coding-system', which see.
5548 The variable `coding-system-for-write', if non-nil, overrides this variable.
5550 This variable is never applied to a way of decoding a file while reading it. */);
5552 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5554 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5556 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5557 doc
: /* *Non-nil means do not display continuation lines.
5558 Instead, give each line of text just one screen line.
5560 Note that this is overridden by the variable
5561 `truncate-partial-width-windows' if that variable is non-nil
5562 and this buffer is not full-frame width. */);
5565 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5567 doc
: /* Non-nil if the visited file is a binary file.
5568 This variable is meaningful on MS-DOG and Windows NT.
5569 On those systems, it is automatically local in every buffer.
5570 On other systems, this variable is normally always nil. */);
5573 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5574 make_number (Lisp_String
),
5575 doc
: /* Name of default directory of current buffer. Should end with slash.
5576 To interactively change the default directory, use command `cd'. */);
5578 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5580 doc
: /* Function called (if non-nil) to perform auto-fill.
5581 It is called after self-inserting any character specified in
5582 the `auto-fill-chars' table.
5583 NOTE: This variable is not a hook;
5584 its value may not be a list of functions. */);
5586 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5587 make_number (Lisp_String
),
5588 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5590 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5591 make_number (Lisp_String
),
5592 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5593 The truename of a file is calculated by `file-truename'
5594 and then abbreviated with `abbreviate-file-name'. */);
5596 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5597 ¤t_buffer
->auto_save_file_name
,
5598 make_number (Lisp_String
),
5599 doc
: /* Name of file for auto-saving current buffer.
5600 If it is nil, that means don't auto-save this buffer. */);
5602 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5603 doc
: /* Non-nil if this buffer is read-only. */);
5605 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5606 doc
: /* Non-nil if this buffer's file has been backed up.
5607 Backing up is done before the first time the file is saved. */);
5609 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5610 make_number (Lisp_Int
),
5611 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5614 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5616 doc
: /* Non-nil enables selective display.
5617 An Integer N as value means display only lines
5618 that start with less than n columns of space.
5619 A value of t means that the character ^M makes itself and
5620 all the rest of the line invisible; also, when saving the buffer
5621 in a file, save the ^M as a newline. */);
5624 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5625 ¤t_buffer
->selective_display_ellipses
,
5627 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5630 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5631 doc
: /* Non-nil if self-insertion should replace existing text.
5632 The value should be one of `overwrite-mode-textual',
5633 `overwrite-mode-binary', or nil.
5634 If it is `overwrite-mode-textual', self-insertion still
5635 inserts at the end of a line, and inserts when point is before a tab,
5636 until the tab is filled in.
5637 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5639 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5641 doc
: /* Display table that controls display of the contents of current buffer.
5643 If this variable is nil, the value of `standard-display-table' is used.
5644 Each window can have its own, overriding display table, see
5645 `set-window-display-table' and `window-display-table'.
5647 The display table is a char-table created with `make-display-table'.
5648 A char-table is an array indexed by character codes. Normal array
5649 primitives `aref' and `aset' can be used to access elements of a char-table.
5651 Each of the char-table elements control how to display the corresponding
5652 text character: the element at index C in the table says how to display
5653 the character whose code is C. Each element should be a vector of
5654 characters or nil. nil means display the character in the default fashion;
5655 otherwise, the characters from the vector are delivered to the screen
5656 instead of the original character.
5658 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5659 a capital Y instead of each X character.
5661 In addition, a char-table has six extra slots to control the display of:
5663 the end of a truncated screen line (extra-slot 0, a single character);
5664 the end of a continued line (extra-slot 1, a single character);
5665 the escape character used to display character codes in octal
5666 (extra-slot 2, a single character);
5667 the character used as an arrow for control characters (extra-slot 3,
5668 a single character);
5669 the decoration indicating the presence of invisible lines (extra-slot 4,
5670 a vector of characters);
5671 the character used to draw the border between side-by-side windows
5672 (extra-slot 5, a single character).
5674 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5676 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5678 doc
: /* *Width of left marginal area for display of a buffer.
5679 A value of nil means no marginal area. */);
5681 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5683 doc
: /* *Width of right marginal area for display of a buffer.
5684 A value of nil means no marginal area. */);
5686 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5688 doc
: /* *Width of this buffer's left fringe (in pixels).
5689 A value of 0 means no left fringe is shown in this buffer's window.
5690 A value of nil means to use the left fringe width from the window's frame. */);
5692 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5694 doc
: /* *Width of this buffer's right fringe (in pixels).
5695 A value of 0 means no right fringe is shown in this buffer's window.
5696 A value of nil means to use the right fringe width from the window's frame. */);
5698 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5700 doc
: /* *Non-nil means to display fringes outside display margins.
5701 A value of nil means to display fringes between margins and buffer text. */);
5703 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5705 doc
: /* *Width of this buffer's scroll bars in pixels.
5706 A value of nil means to use the scroll bar width from the window's frame. */);
5708 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5710 doc
: /* *Position of this buffer's vertical scroll bar.
5711 The value takes effect whenever you tell a window to display this buffer;
5712 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5714 A value of `left' or `right' means put the vertical scroll bar at that side
5715 of the window; a value of nil means don't show any vertical scroll bars.
5716 A value of t (the default) means do whatever the window's frame specifies. */);
5718 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5719 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5720 doc
: /* *Visually indicate empty lines after the buffer end.
5721 If non-nil, a bitmap is displayed in the left fringe of a window on
5722 window-systems. */);
5724 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5725 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
5726 doc
: /* *Visually indicate buffer boundaries and scrolling.
5727 If non-nil, the first and last line of the buffer are marked in the fringe
5728 of a window on window-systems with angle bitmaps, or if the window can be
5729 scrolled, the top and bottom line of the window are marked with up and down
5732 If value is a symbol `left' or `right', both angle and arrow bitmaps
5733 are displayed in the left or right fringe, resp. Any other value
5734 that doesn't look like an alist means display the angle bitmaps in
5735 the left fringe but no arrows.
5737 You can exercise more precise control by using an alist as the
5738 value. Each alist element (INDICATOR . POSITION) specifies
5739 where to show one of the indicators. INDICATOR is one of `top',
5740 `bottom', `up', `down', or t, which specifies the default position,
5741 and POSITION is one of `left', `right', or nil, meaning do not show
5744 For example, ((top . left) (t . right)) places the top angle bitmap in
5745 left fringe, the bottom angle bitmap in right fringe, and both arrow
5746 bitmaps in right fringe. To show just the angle bitmaps in the left
5747 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5749 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5750 ¤t_buffer
->fringe_indicator_alist
, Qnil
,
5751 doc
: /* *Mapping from logical to physical fringe indicator bitmaps.
5752 The value is an alist where each element (INDICATOR . BITMAPS)
5753 specifies the fringe bitmaps used to display a specific logical
5756 INDICATOR specifies the logical indicator type which is one of the
5757 following symbols: `truncation' , `continuation', `overlay-arrow',
5758 `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'.
5760 BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5761 the actual bitmap shown in the left or right fringe for the logical
5762 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5763 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5764 are used only for the `bottom' and `one-line' indicators when the last
5765 (only) line in has no final newline. BITMAPS may also be a single
5766 symbol which is used in both left and right fringes. */);
5768 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5769 ¤t_buffer
->fringe_cursor_alist
, Qnil
,
5770 doc
: /* *Mapping from logical to physical fringe cursor bitmaps.
5771 The value is an alist where each element (CURSOR . BITMAP)
5772 specifies the fringe bitmaps used to display a specific logical
5773 cursor type in the fringe.
5775 CURSOR specifies the logical cursor type which is one of the following
5776 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5777 one is used to show a hollow cursor on narrow lines display lines
5778 where the normal hollow cursor will not fit.
5780 BITMAP is the corresponding fringe bitmap shown for the logical
5783 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5784 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5785 doc
: /* How far to scroll windows upward.
5786 If you move point off the bottom, the window scrolls automatically.
5787 This variable controls how far it scrolls. nil, the default,
5788 means scroll to center point. A fraction means scroll to put point
5789 that fraction of the window's height from the bottom of the window.
5790 When the value is 0.0, point goes at the bottom line, which in the simple
5791 case that you moved off with C-f means scrolling just one line. 1.0 means
5792 point goes at the top, so that in that simple case, the window
5793 scrolls by a full window height. Meaningful values are
5794 between 0.0 and 1.0, inclusive. */);
5796 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5797 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5798 doc
: /* How far to scroll windows downward.
5799 If you move point off the top, the window scrolls automatically.
5800 This variable controls how far it scrolls. nil, the default,
5801 means scroll to center point. A fraction means scroll to put point
5802 that fraction of the window's height from the top of the window.
5803 When the value is 0.0, point goes at the top line, which in the simple
5804 case that you moved off with C-b means scrolling just one line. 1.0 means
5805 point goes at the bottom, so that in that simple case, the window
5806 scrolls by a full window height. Meaningful values are
5807 between 0.0 and 1.0, inclusive. */);
5809 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5813 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5814 doc
: /* List of functions to call before each text change.
5815 Two arguments are passed to each function: the positions of
5816 the beginning and end of the range of old text to be changed.
5817 \(For an insertion, the beginning and end are at the same place.)
5818 No information is given about the length of the text after the change.
5820 Buffer changes made while executing the `before-change-functions'
5821 don't call any before-change or after-change functions.
5822 That's because these variables are temporarily set to nil.
5823 As a result, a hook function cannot straightforwardly alter the value of
5824 these variables. See the Emacs Lisp manual for a way of
5825 accomplishing an equivalent result by using other variables.
5827 If an unhandled error happens in running these functions,
5828 the variable's value remains nil. That prevents the error
5829 from happening repeatedly and making Emacs nonfunctional. */);
5830 Vbefore_change_functions
= Qnil
;
5832 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5833 doc
: /* List of functions to call after each text change.
5834 Three arguments are passed to each function: the positions of
5835 the beginning and end of the range of changed text,
5836 and the length in bytes of the pre-change text replaced by that range.
5837 \(For an insertion, the pre-change length is zero;
5838 for a deletion, that length is the number of bytes deleted,
5839 and the post-change beginning and end are at the same place.)
5841 Buffer changes made while executing the `after-change-functions'
5842 don't call any before-change or after-change functions.
5843 That's because these variables are temporarily set to nil.
5844 As a result, a hook function cannot straightforwardly alter the value of
5845 these variables. See the Emacs Lisp manual for a way of
5846 accomplishing an equivalent result by using other variables.
5848 If an unhandled error happens in running these functions,
5849 the variable's value remains nil. That prevents the error
5850 from happening repeatedly and making Emacs nonfunctional. */);
5851 Vafter_change_functions
= Qnil
;
5853 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5854 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5855 The functions are run using the `run-hooks' function. */);
5856 Vfirst_change_hook
= Qnil
;
5858 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5859 doc
: /* List of undo entries in current buffer.
5860 Recent changes come first; older changes follow newer.
5862 An entry (BEG . END) represents an insertion which begins at
5863 position BEG and ends at position END.
5865 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5866 from (abs POSITION). If POSITION is positive, point was at the front
5867 of the text being deleted; if negative, point was at the end.
5869 An entry (t HIGH . LOW) indicates that the buffer previously had
5870 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5871 of the visited file's modification time, as of that time. If the
5872 modification time of the most recent save is different, this entry is
5875 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5876 was modified between BEG and END. PROPERTY is the property name,
5877 and VALUE is the old value.
5879 An entry (apply FUN-NAME . ARGS) means undo the change with
5880 \(apply FUN-NAME ARGS).
5882 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5883 in the active region. BEG and END is the range affected by this entry
5884 and DELTA is the number of bytes added or deleted in that range by
5887 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5888 was adjusted in position by the offset DISTANCE (an integer).
5890 An entry of the form POSITION indicates that point was at the buffer
5891 location given by the integer. Undoing an entry of this form places
5894 nil marks undo boundaries. The undo command treats the changes
5895 between two undo boundaries as a single step to be undone.
5897 If the value of the variable is t, undo information is not recorded. */);
5899 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5900 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5902 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5903 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5905 Normally, the line-motion functions work by scanning the buffer for
5906 newlines. Columnar operations (like `move-to-column' and
5907 `compute-motion') also work by scanning the buffer, summing character
5908 widths as they go. This works well for ordinary text, but if the
5909 buffer's lines are very long (say, more than 500 characters), these
5910 motion functions will take longer to execute. Emacs may also take
5911 longer to update the display.
5913 If `cache-long-line-scans' is non-nil, these motion functions cache the
5914 results of their scans, and consult the cache to avoid rescanning
5915 regions of the buffer until the text is modified. The caches are most
5916 beneficial when they prevent the most searching---that is, when the
5917 buffer contains long lines and large regions of characters with the
5918 same, fixed screen width.
5920 When `cache-long-line-scans' is non-nil, processing short lines will
5921 become slightly slower (because of the overhead of consulting the
5922 cache), and the caches will use memory roughly proportional to the
5923 number of newlines and characters whose screen width varies.
5925 The caches require no explicit maintenance; their accuracy is
5926 maintained internally by the Emacs primitives. Enabling or disabling
5927 the cache should not affect the behavior of any of the motion
5928 functions; it should only affect their performance. */);
5930 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5931 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5933 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5934 doc
: /* List of formats to use when saving this buffer.
5935 Formats are defined by `format-alist'. This variable is
5936 set when a file is visited. */);
5938 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5939 ¤t_buffer
->auto_save_file_format
, Qnil
,
5940 doc
: /* *Format in which to write auto-save files.
5941 Should be a list of symbols naming formats that are defined in `format-alist'.
5942 If it is t, which is the default, auto-save files are written in the
5943 same format as a regular save would use. */);
5945 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5946 ¤t_buffer
->invisibility_spec
, Qnil
,
5947 doc
: /* Invisibility spec of this buffer.
5948 The default is t, which means that text is invisible
5949 if it has a non-nil `invisible' property.
5950 If the value is a list, a text character is invisible if its `invisible'
5951 property is an element in that list.
5952 If an element is a cons cell of the form (PROP . ELLIPSIS),
5953 then characters with property value PROP are invisible,
5954 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5956 DEFVAR_PER_BUFFER ("buffer-display-count",
5957 ¤t_buffer
->display_count
, Qnil
,
5958 doc
: /* A number incremented each time this buffer is displayed in a window.
5959 The function `set-window-buffer' increments it. */);
5961 DEFVAR_PER_BUFFER ("buffer-display-time",
5962 ¤t_buffer
->display_time
, Qnil
,
5963 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5964 The function `set-window-buffer' updates this variable
5965 to the value obtained by calling `current-time'.
5966 If the buffer has never been shown in a window, the value is nil. */);
5968 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5969 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5970 Non-nil also enables highlighting of the region whenever the mark is active.
5971 The variable `highlight-nonselected-windows' controls whether to highlight
5972 all windows or just the selected window.
5974 If the value is `lambda', that enables Transient Mark mode temporarily
5975 until the next buffer modification. If a command sets the value to `only',
5976 that enables Transient Mark mode for the following command only.
5977 During that following command, the value of `transient-mark-mode'
5978 is `identity'. If it is still `identity' at the end of that command,
5979 it changes to nil. */);
5980 Vtransient_mark_mode
= Qnil
;
5982 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5983 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5984 If the value is t, disregard `buffer-read-only' and all `read-only'
5985 text properties. If the value is a list, disregard `buffer-read-only'
5986 and disregard a `read-only' text property if the property value
5987 is a member of the list. */);
5988 Vinhibit_read_only
= Qnil
;
5990 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5991 doc
: /* Cursor to use when this buffer is in the selected window.
5992 Values are interpreted as follows:
5994 t use the cursor specified for the frame
5995 nil don't display a cursor
5996 box display a filled box cursor
5997 hollow display a hollow box cursor
5998 bar display a vertical bar cursor with default width
5999 (bar . WIDTH) display a vertical bar cursor with width WIDTH
6000 hbar display a horizontal bar cursor with default height
6001 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
6002 ANYTHING ELSE display a hollow box cursor
6004 When the buffer is displayed in a nonselected window,
6005 this variable has no effect; the cursor appears as a hollow box. */);
6007 DEFVAR_PER_BUFFER ("line-spacing",
6008 ¤t_buffer
->extra_line_spacing
, Qnil
,
6009 doc
: /* Additional space to put between lines when displaying a buffer.
6010 The space is measured in pixels, and put below lines on window systems.
6011 If value is a floating point number, it specifies the spacing relative
6012 to the default frame line height. */);
6014 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
6015 ¤t_buffer
->cursor_in_non_selected_windows
, Qnil
,
6016 doc
: /* *Cursor type to display in non-selected windows.
6017 t means to use hollow box cursor. See `cursor-type' for other values. */);
6019 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
6020 doc
: /* List of functions called with no args to query before killing a buffer. */);
6021 Vkill_buffer_query_functions
= Qnil
;
6023 defsubr (&Sbuffer_live_p
);
6024 defsubr (&Sbuffer_list
);
6025 defsubr (&Sget_buffer
);
6026 defsubr (&Sget_file_buffer
);
6027 defsubr (&Sget_buffer_create
);
6028 defsubr (&Smake_indirect_buffer
);
6029 defsubr (&Sgenerate_new_buffer_name
);
6030 defsubr (&Sbuffer_name
);
6031 /*defsubr (&Sbuffer_number);*/
6032 defsubr (&Sbuffer_file_name
);
6033 defsubr (&Sbuffer_base_buffer
);
6034 defsubr (&Sbuffer_local_value
);
6035 defsubr (&Sbuffer_local_variables
);
6036 defsubr (&Sbuffer_modified_p
);
6037 defsubr (&Sset_buffer_modified_p
);
6038 defsubr (&Sbuffer_modified_tick
);
6039 defsubr (&Srename_buffer
);
6040 defsubr (&Sother_buffer
);
6041 defsubr (&Sbuffer_enable_undo
);
6042 defsubr (&Skill_buffer
);
6043 defsubr (&Sset_buffer_major_mode
);
6044 defsubr (&Sswitch_to_buffer
);
6045 defsubr (&Spop_to_buffer
);
6046 defsubr (&Scurrent_buffer
);
6047 defsubr (&Sset_buffer
);
6048 defsubr (&Sbarf_if_buffer_read_only
);
6049 defsubr (&Sbury_buffer
);
6050 defsubr (&Serase_buffer
);
6051 defsubr (&Sset_buffer_multibyte
);
6052 defsubr (&Skill_all_local_variables
);
6054 defsubr (&Soverlayp
);
6055 defsubr (&Smake_overlay
);
6056 defsubr (&Sdelete_overlay
);
6057 defsubr (&Smove_overlay
);
6058 defsubr (&Soverlay_start
);
6059 defsubr (&Soverlay_end
);
6060 defsubr (&Soverlay_buffer
);
6061 defsubr (&Soverlay_properties
);
6062 defsubr (&Soverlays_at
);
6063 defsubr (&Soverlays_in
);
6064 defsubr (&Snext_overlay_change
);
6065 defsubr (&Sprevious_overlay_change
);
6066 defsubr (&Soverlay_recenter
);
6067 defsubr (&Soverlay_lists
);
6068 defsubr (&Soverlay_get
);
6069 defsubr (&Soverlay_put
);
6070 defsubr (&Srestore_buffer_modified_p
);
6076 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6077 initial_define_key (control_x_map
, 'k', "kill-buffer");
6079 /* This must not be in syms_of_buffer, because Qdisabled is not
6080 initialized when that function gets called. */
6081 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
6084 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
6085 (do not change this comment) */