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, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 This file is part of GNU Emacs.
9 GNU Emacs is free software: you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation, either version 3 of the License, or
12 (at your option) any later version.
14 GNU Emacs is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
26 #include <sys/param.h>
36 #include "intervals.h"
40 #include "character.h"
41 #include "region-cache.h"
43 #include "blockinput.h"
48 struct buffer
*current_buffer
; /* the current buffer */
50 /* First buffer in chain of all buffers (in reverse order of creation).
51 Threaded through ->next. */
53 struct buffer
*all_buffers
;
55 /* This structure holds the default values of the buffer-local variables
56 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
57 The default value occupies the same slot in this structure
58 as an individual buffer's value occupies in that buffer.
59 Setting the default value also goes through the alist of buffers
60 and stores into each buffer that does not say it has a local value. */
62 DECL_ALIGN (struct buffer
, buffer_defaults
);
64 /* A Lisp_Object pointer to the above, used for staticpro */
66 static Lisp_Object Vbuffer_defaults
;
68 /* This structure marks which slots in a buffer have corresponding
69 default values in buffer_defaults.
70 Each such slot has a nonzero value in this structure.
71 The value has only one nonzero bit.
73 When a buffer has its own local value for a slot,
74 the entry for that slot (found in the same slot in this structure)
75 is turned on in the buffer's local_flags array.
77 If a slot in this structure is -1, then even though there may
78 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
79 and the corresponding slot in buffer_defaults is not used.
81 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
82 zero, that is a bug */
84 struct buffer buffer_local_flags
;
86 /* This structure holds the names of symbols whose values may be
87 buffer-local. It is indexed and accessed in the same way as the above. */
89 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
91 /* A Lisp_Object pointer to the above, used for staticpro */
92 static Lisp_Object Vbuffer_local_symbols
;
94 /* Return the symbol of the per-buffer variable at offset OFFSET in
95 the buffer structure. */
97 #define PER_BUFFER_SYMBOL(OFFSET) \
98 (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols))
100 /* Flags indicating which built-in buffer-local variables
101 are permanent locals. */
102 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
104 /* Number of per-buffer variables used. */
106 int last_per_buffer_idx
;
108 EXFUN (Fset_buffer
, 1);
109 void set_buffer_internal (struct buffer
*b
);
110 void set_buffer_internal_1 (struct buffer
*b
);
111 static void call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
,
112 int after
, Lisp_Object arg1
,
113 Lisp_Object arg2
, Lisp_Object arg3
);
114 static void swap_out_buffer_local_variables (struct buffer
*b
);
115 static void reset_buffer_local_variables (struct buffer
*b
, int permanent_too
);
117 /* Alist of all buffer names vs the buffers. */
118 /* This used to be a variable, but is no longer,
119 to prevent lossage due to user rplac'ing this alist or its elements. */
120 Lisp_Object Vbuffer_alist
;
122 /* Functions to call before and after each text change. */
123 Lisp_Object Vbefore_change_functions
;
124 Lisp_Object Vafter_change_functions
;
126 Lisp_Object Vtransient_mark_mode
;
128 /* t means ignore all read-only text properties.
129 A list means ignore such a property if its value is a member of the list.
130 Any non-nil value means ignore buffer-read-only. */
131 Lisp_Object Vinhibit_read_only
;
133 /* List of functions to call that can query about killing a buffer.
134 If any of these functions returns nil, we don't kill it. */
135 Lisp_Object Vkill_buffer_query_functions
;
136 Lisp_Object Qkill_buffer_query_functions
;
138 /* Hook run before changing a major mode. */
139 Lisp_Object Vchange_major_mode_hook
, Qchange_major_mode_hook
;
141 /* List of functions to call before changing an unmodified buffer. */
142 Lisp_Object Vfirst_change_hook
;
144 Lisp_Object Qfirst_change_hook
;
145 Lisp_Object Qbefore_change_functions
;
146 Lisp_Object Qafter_change_functions
;
147 Lisp_Object Qucs_set_table_for_input
;
149 /* If nonzero, all modification hooks are suppressed. */
150 int inhibit_modification_hooks
;
152 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
153 Lisp_Object Qpermanent_local_hook
;
155 Lisp_Object Qprotected_field
;
157 Lisp_Object QSFundamental
; /* A string "Fundamental" */
159 Lisp_Object Qkill_buffer_hook
;
161 Lisp_Object Qget_file_buffer
;
163 Lisp_Object Qoverlayp
;
165 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
167 Lisp_Object Qmodification_hooks
;
168 Lisp_Object Qinsert_in_front_hooks
;
169 Lisp_Object Qinsert_behind_hooks
;
171 static void alloc_buffer_text (struct buffer
*, size_t);
172 static void free_buffer_text (struct buffer
*b
);
173 static struct Lisp_Overlay
* copy_overlays (struct buffer
*, struct Lisp_Overlay
*);
174 static void modify_overlay (struct buffer
*, EMACS_INT
, EMACS_INT
);
175 static Lisp_Object
buffer_lisp_local_variables (struct buffer
*);
177 extern char * emacs_strerror (int);
179 /* For debugging; temporary. See set_buffer_internal. */
180 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
183 nsberror (Lisp_Object spec
)
186 error ("No buffer named %s", SDATA (spec
));
187 error ("Invalid buffer argument");
190 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
191 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
192 Value is nil if OBJECT is not a buffer or if it has been killed. */)
195 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
199 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
200 doc
: /* Return a list of all existing live buffers.
201 If the optional arg FRAME is a frame, we return the buffer list
202 in the proper order for that frame: the buffers in FRAME's `buffer-list'
203 frame parameter come first, followed by the rest of the buffers. */)
207 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
211 Lisp_Object framelist
, prevlist
, tail
;
216 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
217 prevlist
= Fnreverse (Fcopy_sequence (XFRAME (frame
)->buried_buffer_list
));
219 /* Remove from GENERAL any buffer that duplicates one in
220 FRAMELIST or PREVLIST. */
224 general
= Fdelq (XCAR (tail
), general
);
230 general
= Fdelq (XCAR (tail
), general
);
237 return Fnconc (3, args
);
243 /* Like Fassoc, but use Fstring_equal to compare
244 (which ignores text properties),
245 and don't ever QUIT. */
248 assoc_ignore_text_properties (register Lisp_Object key
, Lisp_Object list
)
250 register Lisp_Object tail
;
251 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
253 register Lisp_Object elt
, tem
;
255 tem
= Fstring_equal (Fcar (elt
), key
);
262 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
263 doc
: /* Return the buffer named BUFFER-OR-NAME.
264 BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME
265 is a string and there is no buffer with that name, return nil. If
266 BUFFER-OR-NAME is a buffer, return it as given. */)
267 (register Lisp_Object buffer_or_name
)
269 if (BUFFERP (buffer_or_name
))
270 return buffer_or_name
;
271 CHECK_STRING (buffer_or_name
);
273 return Fcdr (assoc_ignore_text_properties (buffer_or_name
, Vbuffer_alist
));
276 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
277 doc
: /* Return the buffer visiting file FILENAME (a string).
278 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
279 If there is no such live buffer, return nil.
280 See also `find-buffer-visiting'. */)
281 (register Lisp_Object filename
)
283 register Lisp_Object tail
, buf
, tem
;
286 CHECK_STRING (filename
);
287 filename
= Fexpand_file_name (filename
, Qnil
);
289 /* If the file name has special constructs in it,
290 call the corresponding file handler. */
291 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
293 return call2 (handler
, Qget_file_buffer
, filename
);
295 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
297 buf
= Fcdr (XCAR (tail
));
298 if (!BUFFERP (buf
)) continue;
299 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
300 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
308 get_truename_buffer (register Lisp_Object filename
)
310 register Lisp_Object tail
, buf
, tem
;
312 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
314 buf
= Fcdr (XCAR (tail
));
315 if (!BUFFERP (buf
)) continue;
316 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
317 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
324 /* Incremented for each buffer created, to assign the buffer number. */
327 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
328 doc
: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed.
329 If BUFFER-OR-NAME is a string and a live buffer with that name exists,
330 return that buffer. If no such buffer exists, create a new buffer with
331 that name and return it. If BUFFER-OR-NAME starts with a space, the new
332 buffer does not keep undo information.
334 If BUFFER-OR-NAME is a buffer instead of a string, return it as given,
335 even if it is dead. The return value is never nil. */)
336 (register Lisp_Object buffer_or_name
)
338 register Lisp_Object buffer
, name
;
339 register struct buffer
*b
;
341 buffer
= Fget_buffer (buffer_or_name
);
345 if (SCHARS (buffer_or_name
) == 0)
346 error ("Empty string for buffer name is not allowed");
348 b
= allocate_buffer ();
350 /* An ordinary buffer uses its own struct buffer_text. */
351 b
->text
= &b
->own_text
;
354 BUF_GAP_SIZE (b
) = 20;
356 /* We allocate extra 1-byte at the tail and keep it always '\0' for
357 anchoring a search. */
358 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
360 if (! BUF_BEG_ADDR (b
))
361 buffer_memory_full ();
368 BUF_PT_BYTE (b
) = BEG_BYTE
;
369 BUF_GPT_BYTE (b
) = BEG_BYTE
;
370 BUF_BEGV_BYTE (b
) = BEG_BYTE
;
371 BUF_ZV_BYTE (b
) = BEG_BYTE
;
372 BUF_Z_BYTE (b
) = BEG_BYTE
;
374 BUF_CHARS_MODIFF (b
) = 1;
375 BUF_OVERLAY_MODIFF (b
) = 1;
376 BUF_SAVE_MODIFF (b
) = 1;
377 BUF_INTERVALS (b
) = 0;
378 BUF_UNCHANGED_MODIFIED (b
) = 1;
379 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
380 BUF_END_UNCHANGED (b
) = 0;
381 BUF_BEG_UNCHANGED (b
) = 0;
382 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
384 b
->newline_cache
= 0;
385 b
->width_run_cache
= 0;
386 b
->width_table
= Qnil
;
387 b
->prevent_redisplay_optimizations_p
= 1;
389 /* Put this on the chain of all buffers including killed ones. */
390 b
->next
= all_buffers
;
393 /* An ordinary buffer normally doesn't need markers
394 to handle BEGV and ZV. */
396 b
->begv_marker
= Qnil
;
399 name
= Fcopy_sequence (buffer_or_name
);
400 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
403 b
->undo_list
= (SREF (name
, 0) != ' ') ? Qnil
: Qt
;
406 reset_buffer_local_variables (b
, 1);
408 b
->mark
= Fmake_marker ();
409 BUF_MARKERS (b
) = NULL
;
412 /* Put this in the alist of all live buffers. */
413 XSETBUFFER (buffer
, b
);
414 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
416 /* An error in calling the function here (should someone redefine it)
417 can lead to infinite regress until you run out of stack. rms
418 says that's not worth protecting against. */
419 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
420 /* buffer is on buffer-alist, so no gcpro. */
421 call1 (Qucs_set_table_for_input
, buffer
);
427 /* Return a list of overlays which is a copy of the overlay list
428 LIST, but for buffer B. */
430 static struct Lisp_Overlay
*
431 copy_overlays (struct buffer
*b
, struct Lisp_Overlay
*list
)
434 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
436 XSETBUFFER (buffer
, b
);
438 for (; list
; list
= list
->next
)
440 Lisp_Object overlay
, start
, end
, old_overlay
;
443 XSETMISC (old_overlay
, list
);
444 charpos
= marker_position (OVERLAY_START (old_overlay
));
445 start
= Fmake_marker ();
446 Fset_marker (start
, make_number (charpos
), buffer
);
447 XMARKER (start
)->insertion_type
448 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
450 charpos
= marker_position (OVERLAY_END (old_overlay
));
451 end
= Fmake_marker ();
452 Fset_marker (end
, make_number (charpos
), buffer
);
453 XMARKER (end
)->insertion_type
454 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
456 overlay
= allocate_misc ();
457 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
458 OVERLAY_START (overlay
) = start
;
459 OVERLAY_END (overlay
) = end
;
460 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
461 XOVERLAY (overlay
)->next
= NULL
;
464 tail
= tail
->next
= XOVERLAY (overlay
);
466 result
= tail
= XOVERLAY (overlay
);
473 /* Clone per-buffer values of buffer FROM.
475 Buffer TO gets the same per-buffer values as FROM, with the
476 following exceptions: (1) TO's name is left untouched, (2) markers
477 are copied and made to refer to TO, and (3) overlay lists are
481 clone_per_buffer_values (struct buffer
*from
, struct buffer
*to
)
483 Lisp_Object to_buffer
;
486 XSETBUFFER (to_buffer
, to
);
488 /* buffer-local Lisp variables start at `undo_list',
489 tho only the ones from `name' on are GC'd normally. */
490 for (offset
= PER_BUFFER_VAR_OFFSET (undo_list
);
492 offset
+= sizeof (Lisp_Object
))
496 /* Don't touch the `name' which should be unique for every buffer. */
497 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
500 obj
= PER_BUFFER_VALUE (from
, offset
);
501 if (MARKERP (obj
) && XMARKER (obj
)->buffer
== from
)
503 struct Lisp_Marker
*m
= XMARKER (obj
);
504 obj
= Fmake_marker ();
505 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
506 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
509 PER_BUFFER_VALUE (to
, offset
) = obj
;
512 memcpy (to
->local_flags
, from
->local_flags
, sizeof to
->local_flags
);
514 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
515 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
517 /* Get (a copy of) the alist of Lisp-level local variables of FROM
518 and install that in TO. */
519 to
->local_var_alist
= buffer_lisp_local_variables (from
);
522 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
524 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
525 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
526 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
527 NAME should be a string which is not the name of an existing buffer.
528 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
529 such as major and minor modes, in the indirect buffer.
530 CLONE nil means the indirect buffer's state is reset to default values. */)
531 (Lisp_Object base_buffer
, Lisp_Object name
, Lisp_Object clone
)
533 Lisp_Object buf
, tem
;
537 buf
= Fget_buffer (name
);
539 error ("Buffer name `%s' is in use", SDATA (name
));
542 base_buffer
= Fget_buffer (base_buffer
);
543 if (NILP (base_buffer
))
544 error ("No such buffer: `%s'", SDATA (tem
));
545 if (NILP (XBUFFER (base_buffer
)->name
))
546 error ("Base buffer has been killed");
548 if (SCHARS (name
) == 0)
549 error ("Empty string for buffer name is not allowed");
551 b
= allocate_buffer ();
553 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
554 ? XBUFFER (base_buffer
)->base_buffer
555 : XBUFFER (base_buffer
));
557 /* Use the base buffer's text object. */
558 b
->text
= b
->base_buffer
->text
;
560 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
561 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
562 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
563 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
564 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
565 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
567 b
->newline_cache
= 0;
568 b
->width_run_cache
= 0;
569 b
->width_table
= Qnil
;
571 /* Put this on the chain of all buffers including killed ones. */
572 b
->next
= all_buffers
;
575 name
= Fcopy_sequence (name
);
576 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
580 reset_buffer_local_variables (b
, 1);
582 /* Put this in the alist of all live buffers. */
584 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
586 b
->mark
= Fmake_marker ();
589 /* The multibyte status belongs to the base buffer. */
590 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
592 /* Make sure the base buffer has markers for its narrowing. */
593 if (NILP (b
->base_buffer
->pt_marker
))
595 b
->base_buffer
->pt_marker
= Fmake_marker ();
596 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
597 BUF_PT (b
->base_buffer
),
598 BUF_PT_BYTE (b
->base_buffer
));
600 if (NILP (b
->base_buffer
->begv_marker
))
602 b
->base_buffer
->begv_marker
= Fmake_marker ();
603 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
604 BUF_BEGV (b
->base_buffer
),
605 BUF_BEGV_BYTE (b
->base_buffer
));
607 if (NILP (b
->base_buffer
->zv_marker
))
609 b
->base_buffer
->zv_marker
= Fmake_marker ();
610 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
611 BUF_ZV (b
->base_buffer
),
612 BUF_ZV_BYTE (b
->base_buffer
));
613 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
618 /* Give the indirect buffer markers for its narrowing. */
619 b
->pt_marker
= Fmake_marker ();
620 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
621 b
->begv_marker
= Fmake_marker ();
622 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
623 b
->zv_marker
= Fmake_marker ();
624 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
625 XMARKER (b
->zv_marker
)->insertion_type
= 1;
629 struct buffer
*old_b
= current_buffer
;
631 clone_per_buffer_values (b
->base_buffer
, b
);
633 b
->file_truename
= Qnil
;
634 b
->display_count
= make_number (0);
636 b
->auto_save_file_name
= Qnil
;
637 set_buffer_internal_1 (b
);
638 Fset (intern ("buffer-save-without-query"), Qnil
);
639 Fset (intern ("buffer-file-number"), Qnil
);
640 Fset (intern ("buffer-stale-function"), Qnil
);
641 set_buffer_internal_1 (old_b
);
648 delete_all_overlays (struct buffer
*b
)
652 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
653 have to empty the list, otherwise we end up with overlays that
654 think they belong to this buffer while the buffer doesn't know about
656 while (b
->overlays_before
)
658 XSETMISC (overlay
, b
->overlays_before
);
659 Fdelete_overlay (overlay
);
661 while (b
->overlays_after
)
663 XSETMISC (overlay
, b
->overlays_after
);
664 Fdelete_overlay (overlay
);
666 eassert (b
->overlays_before
== NULL
);
667 eassert (b
->overlays_after
== NULL
);
670 /* Reinitialize everything about a buffer except its name and contents
672 If called on an already-initialized buffer, the list of overlays
673 should be deleted before calling this function, otherwise we end up
674 with overlays that claim to belong to the buffer but the buffer
675 claims it doesn't belong to it. */
678 reset_buffer (register struct buffer
*b
)
681 b
->file_truename
= Qnil
;
682 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
684 b
->modtime_size
= -1;
685 XSETFASTINT (b
->save_length
, 0);
686 b
->last_window_start
= 1;
687 /* It is more conservative to start out "changed" than "unchanged". */
689 b
->prevent_redisplay_optimizations_p
= 1;
691 BUF_AUTOSAVE_MODIFF (b
) = 0;
692 b
->auto_save_failure_time
= -1;
693 b
->auto_save_file_name
= Qnil
;
695 b
->overlays_before
= NULL
;
696 b
->overlays_after
= NULL
;
697 b
->overlay_center
= BEG
;
698 b
->mark_active
= Qnil
;
699 b
->point_before_scroll
= Qnil
;
700 b
->file_format
= Qnil
;
701 b
->auto_save_file_format
= Qt
;
702 b
->last_selected_window
= Qnil
;
703 XSETINT (b
->display_count
, 0);
704 b
->display_time
= Qnil
;
705 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
706 b
->cursor_type
= buffer_defaults
.cursor_type
;
707 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
709 b
->display_error_modiff
= 0;
712 /* Reset buffer B's local variables info.
713 Don't use this on a buffer that has already been in use;
714 it does not treat permanent locals consistently.
715 Instead, use Fkill_all_local_variables.
717 If PERMANENT_TOO is 1, then we reset permanent
718 buffer-local variables. If PERMANENT_TOO is 0,
719 we preserve those. */
722 reset_buffer_local_variables (register struct buffer
*b
, int permanent_too
)
727 /* Reset the major mode to Fundamental, together with all the
728 things that depend on the major mode.
729 default-major-mode is handled at a higher level.
730 We ignore it here. */
731 b
->major_mode
= Qfundamental_mode
;
733 b
->mode_name
= QSFundamental
;
734 b
->minor_modes
= Qnil
;
736 /* If the standard case table has been altered and invalidated,
737 fix up its insides first. */
738 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
739 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
740 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
741 Fset_standard_case_table (Vascii_downcase_table
);
743 b
->downcase_table
= Vascii_downcase_table
;
744 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
745 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
746 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
747 b
->invisibility_spec
= Qt
;
749 b
->buffer_file_type
= Qnil
;
752 /* Reset all (or most) per-buffer variables to their defaults. */
754 b
->local_var_alist
= Qnil
;
757 Lisp_Object tmp
, prop
, last
= Qnil
;
758 for (tmp
= b
->local_var_alist
; CONSP (tmp
); tmp
= XCDR (tmp
))
759 if (!NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
761 /* If permanent-local, keep it. */
763 if (EQ (prop
, Qpermanent_local_hook
))
765 /* This is a partially permanent hook variable.
766 Preserve only the elements that want to be preserved. */
767 Lisp_Object list
, newlist
;
768 list
= XCDR (XCAR (tmp
));
772 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
774 Lisp_Object elt
= XCAR (list
);
775 /* Preserve element ELT if it's t,
776 if it is a function with a `permanent-local-hook' property,
777 or if it's not a symbol. */
780 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
781 newlist
= Fcons (elt
, newlist
);
783 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
786 /* Delete this local variable. */
787 else if (NILP (last
))
788 b
->local_var_alist
= XCDR (tmp
);
790 XSETCDR (last
, XCDR (tmp
));
793 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
794 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
795 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
797 /* For each slot that has a default value,
798 copy that into the slot. */
800 /* buffer-local Lisp variables start at `undo_list',
801 tho only the ones from `name' on are GC'd normally. */
802 for (offset
= PER_BUFFER_VAR_OFFSET (undo_list
);
804 offset
+= sizeof (Lisp_Object
))
806 int idx
= PER_BUFFER_IDX (offset
);
809 || buffer_permanent_local_flags
[idx
] == 0)))
810 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
814 /* We split this away from generate-new-buffer, because rename-buffer
815 and set-visited-file-name ought to be able to use this to really
816 rename the buffer properly. */
818 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
820 doc
: /* Return a string that is the name of no existing buffer based on NAME.
821 If there is no live buffer named NAME, then return NAME.
822 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
823 \(starting at 2) until an unused name is found, and then return that name.
824 Optional second argument IGNORE specifies a name that is okay to use (if
825 it is in the sequence to be tried) even if a buffer with that name exists. */)
826 (register Lisp_Object name
, Lisp_Object ignore
)
828 register Lisp_Object gentemp
, tem
;
834 tem
= Fstring_equal (name
, ignore
);
837 tem
= Fget_buffer (name
);
844 sprintf (number
, "<%d>", ++count
);
845 gentemp
= concat2 (name
, build_string (number
));
846 tem
= Fstring_equal (gentemp
, ignore
);
849 tem
= Fget_buffer (gentemp
);
856 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
857 doc
: /* Return the name of BUFFER, as a string.
858 BUFFER defaults to the current buffer.
859 Return nil if BUFFER has been killed. */)
860 (register Lisp_Object buffer
)
863 return current_buffer
->name
;
864 CHECK_BUFFER (buffer
);
865 return XBUFFER (buffer
)->name
;
868 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
869 doc
: /* Return name of file BUFFER is visiting, or nil if none.
870 No argument or nil as argument means use the current buffer. */)
871 (register Lisp_Object buffer
)
874 return current_buffer
->filename
;
875 CHECK_BUFFER (buffer
);
876 return XBUFFER (buffer
)->filename
;
879 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
881 doc
: /* Return the base buffer of indirect buffer BUFFER.
882 If BUFFER is not indirect, return nil.
883 BUFFER defaults to the current buffer. */)
884 (register Lisp_Object buffer
)
887 Lisp_Object base_buffer
;
890 base
= current_buffer
->base_buffer
;
893 CHECK_BUFFER (buffer
);
894 base
= XBUFFER (buffer
)->base_buffer
;
899 XSETBUFFER (base_buffer
, base
);
903 DEFUN ("buffer-local-value", Fbuffer_local_value
,
904 Sbuffer_local_value
, 2, 2, 0,
905 doc
: /* Return the value of VARIABLE in BUFFER.
906 If VARIABLE does not have a buffer-local binding in BUFFER, the value
907 is the default binding of the variable. */)
908 (register Lisp_Object variable
, register Lisp_Object buffer
)
910 register struct buffer
*buf
;
911 register Lisp_Object result
;
912 struct Lisp_Symbol
*sym
;
914 CHECK_SYMBOL (variable
);
915 CHECK_BUFFER (buffer
);
916 buf
= XBUFFER (buffer
);
917 sym
= XSYMBOL (variable
);
920 switch (sym
->redirect
)
922 case SYMBOL_VARALIAS
: sym
= indirect_variable (sym
); goto start
;
923 case SYMBOL_PLAINVAL
: result
= SYMBOL_VAL (sym
); break;
924 case SYMBOL_LOCALIZED
:
925 { /* Look in local_var_alist. */
926 struct Lisp_Buffer_Local_Value
*blv
= SYMBOL_BLV (sym
);
927 XSETSYMBOL (variable
, sym
); /* Update In case of aliasing. */
928 result
= Fassoc (variable
, buf
->local_var_alist
);
932 { /* What binding is loaded right now? */
933 Lisp_Object current_alist_element
= blv
->valcell
;
935 /* The value of the currently loaded binding is not
936 stored in it, but rather in the realvalue slot.
937 Store that value into the binding it belongs to
938 in case that is the one we are about to use. */
940 XSETCDR (current_alist_element
,
941 do_symval_forwarding (blv
->fwd
));
943 /* Now get the (perhaps updated) value out of the binding. */
944 result
= XCDR (result
);
947 result
= Fdefault_value (variable
);
950 case SYMBOL_FORWARDED
:
952 union Lisp_Fwd
*fwd
= SYMBOL_FWD (sym
);
953 if (BUFFER_OBJFWDP (fwd
))
954 result
= PER_BUFFER_VALUE (buf
, XBUFFER_OBJFWD (fwd
)->offset
);
956 result
= Fdefault_value (variable
);
962 if (!EQ (result
, Qunbound
))
965 xsignal1 (Qvoid_variable
, variable
);
968 /* Return an alist of the Lisp-level buffer-local bindings of
969 buffer BUF. That is, don't include the variables maintained
970 in special slots in the buffer object. */
973 buffer_lisp_local_variables (struct buffer
*buf
)
975 Lisp_Object result
= Qnil
;
976 register Lisp_Object tail
;
977 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
979 Lisp_Object val
, elt
;
983 /* Reference each variable in the alist in buf.
984 If inquiring about the current buffer, this gets the current values,
985 so store them into the alist so the alist is up to date.
986 If inquiring about some other buffer, this swaps out any values
987 for that buffer, making the alist up to date automatically. */
988 val
= find_symbol_value (XCAR (elt
));
989 /* Use the current buffer value only if buf is the current buffer. */
990 if (buf
!= current_buffer
)
993 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
999 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1000 Sbuffer_local_variables
, 0, 1, 0,
1001 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1002 Most elements look like (SYMBOL . VALUE), describing one variable.
1003 For a symbol that is locally unbound, just the symbol appears in the value.
1004 Note that storing new VALUEs in these elements doesn't change the variables.
1005 No argument or nil as argument means use current buffer as BUFFER. */)
1006 (register Lisp_Object buffer
)
1008 register struct buffer
*buf
;
1009 register Lisp_Object result
;
1012 buf
= current_buffer
;
1015 CHECK_BUFFER (buffer
);
1016 buf
= XBUFFER (buffer
);
1019 result
= buffer_lisp_local_variables (buf
);
1021 /* Add on all the variables stored in special slots. */
1025 /* buffer-local Lisp variables start at `undo_list',
1026 tho only the ones from `name' on are GC'd normally. */
1027 for (offset
= PER_BUFFER_VAR_OFFSET (undo_list
);
1028 offset
< sizeof (struct buffer
);
1029 /* sizeof EMACS_INT == sizeof Lisp_Object */
1030 offset
+= (sizeof (EMACS_INT
)))
1032 idx
= PER_BUFFER_IDX (offset
);
1033 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1034 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1035 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1036 PER_BUFFER_VALUE (buf
, offset
)),
1044 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1046 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1047 No argument or nil as argument means use current buffer as BUFFER. */)
1048 (register Lisp_Object buffer
)
1050 register struct buffer
*buf
;
1052 buf
= current_buffer
;
1055 CHECK_BUFFER (buffer
);
1056 buf
= XBUFFER (buffer
);
1059 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1062 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1064 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1065 A non-nil FLAG means mark the buffer modified. */)
1066 (register Lisp_Object flag
)
1068 register int already
;
1069 register Lisp_Object fn
;
1070 Lisp_Object buffer
, window
;
1072 #ifdef CLASH_DETECTION
1073 /* If buffer becoming modified, lock the file.
1074 If buffer becoming unmodified, unlock the file. */
1076 fn
= current_buffer
->file_truename
;
1077 /* Test buffer-file-name so that binding it to nil is effective. */
1078 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1080 already
= SAVE_MODIFF
< MODIFF
;
1081 if (!already
&& !NILP (flag
))
1083 else if (already
&& NILP (flag
))
1086 #endif /* CLASH_DETECTION */
1088 /* Here we have a problem. SAVE_MODIFF is used here to encode
1089 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1090 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1091 modify SAVE_MODIFF to affect one, we may affect the other
1093 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1094 if SAVE_MODIFF<auto_save_modified that means we risk changing
1095 recent-auto-save-p from t to nil.
1096 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1097 we risk changing recent-auto-save-p from nil to t. */
1098 SAVE_MODIFF
= (NILP (flag
)
1099 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1101 /* Let's try to preserve recent-auto-save-p. */
1102 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1103 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1104 we can either decrease SAVE_MODIFF and auto_save_modified
1105 or increase MODIFF. */
1108 /* Set update_mode_lines only if buffer is displayed in some window.
1109 Packages like jit-lock or lazy-lock preserve a buffer's modified
1110 state by recording/restoring the state around blocks of code.
1111 Setting update_mode_lines makes redisplay consider all windows
1112 (on all frames). Stealth fontification of buffers not displayed
1113 would incur additional redisplay costs if we'd set
1114 update_modes_lines unconditionally.
1116 Ideally, I think there should be another mechanism for fontifying
1117 buffers without "modifying" buffers, or redisplay should be
1118 smarter about updating the `*' in mode lines. --gerd */
1119 XSETBUFFER (buffer
, current_buffer
);
1120 window
= Fget_buffer_window (buffer
, Qt
);
1121 if (WINDOWP (window
))
1123 ++update_mode_lines
;
1124 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1130 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1131 Srestore_buffer_modified_p
, 1, 1, 0,
1132 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1133 It is not ensured that mode lines will be updated to show the modified
1134 state of the current buffer. Use with care. */)
1137 #ifdef CLASH_DETECTION
1140 /* If buffer becoming modified, lock the file.
1141 If buffer becoming unmodified, unlock the file. */
1143 fn
= current_buffer
->file_truename
;
1144 /* Test buffer-file-name so that binding it to nil is effective. */
1145 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1147 int already
= SAVE_MODIFF
< MODIFF
;
1148 if (!already
&& !NILP (flag
))
1150 else if (already
&& NILP (flag
))
1153 #endif /* CLASH_DETECTION */
1155 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1159 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1161 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1162 Each buffer has a tick counter which is incremented each time the
1163 text in that buffer is changed. It wraps around occasionally.
1164 No argument or nil as argument means use current buffer as BUFFER. */)
1165 (register Lisp_Object buffer
)
1167 register struct buffer
*buf
;
1169 buf
= current_buffer
;
1172 CHECK_BUFFER (buffer
);
1173 buf
= XBUFFER (buffer
);
1176 return make_number (BUF_MODIFF (buf
));
1179 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1180 Sbuffer_chars_modified_tick
, 0, 1, 0,
1181 doc
: /* Return BUFFER's character-change tick counter.
1182 Each buffer has a character-change tick counter, which is set to the
1183 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1184 time text in that buffer is inserted or deleted. By comparing the
1185 values returned by two individual calls of `buffer-chars-modified-tick',
1186 you can tell whether a character change occurred in that buffer in
1187 between these calls. No argument or nil as argument means use current
1188 buffer as BUFFER. */)
1189 (register Lisp_Object buffer
)
1191 register struct buffer
*buf
;
1193 buf
= current_buffer
;
1196 CHECK_BUFFER (buffer
);
1197 buf
= XBUFFER (buffer
);
1200 return make_number (BUF_CHARS_MODIFF (buf
));
1203 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1204 "(list (read-string \"Rename buffer (to new name): \" \
1205 nil 'buffer-name-history (buffer-name (current-buffer))) \
1206 current-prefix-arg)",
1207 doc
: /* Change current buffer's name to NEWNAME (a string).
1208 If second arg UNIQUE is nil or omitted, it is an error if a
1209 buffer named NEWNAME already exists.
1210 If UNIQUE is non-nil, come up with a new name using
1211 `generate-new-buffer-name'.
1212 Interactively, you can set UNIQUE with a prefix argument.
1213 We return the name we actually gave the buffer.
1214 This does not change the name of the visited file (if any). */)
1215 (register Lisp_Object newname
, Lisp_Object unique
)
1217 register Lisp_Object tem
, buf
;
1219 CHECK_STRING (newname
);
1221 if (SCHARS (newname
) == 0)
1222 error ("Empty string is invalid as a buffer name");
1224 tem
= Fget_buffer (newname
);
1227 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1228 rename the buffer automatically so you can create another
1229 with the original name. It makes UNIQUE equivalent to
1230 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1231 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1232 return current_buffer
->name
;
1234 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1236 error ("Buffer name `%s' is in use", SDATA (newname
));
1239 current_buffer
->name
= newname
;
1241 /* Catch redisplay's attention. Unless we do this, the mode lines for
1242 any windows displaying current_buffer will stay unchanged. */
1243 update_mode_lines
++;
1245 XSETBUFFER (buf
, current_buffer
);
1246 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1247 if (NILP (current_buffer
->filename
)
1248 && !NILP (current_buffer
->auto_save_file_name
))
1249 call0 (intern ("rename-auto-save-file"));
1250 /* Refetch since that last call may have done GC. */
1251 return current_buffer
->name
;
1254 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1255 doc
: /* Return most recently selected buffer other than BUFFER.
1256 Buffers not visible in windows are preferred to visible buffers,
1257 unless optional second argument VISIBLE-OK is non-nil.
1258 If the optional third argument FRAME is non-nil, use that frame's
1259 buffer list instead of the selected frame's buffer list.
1260 If no other buffer exists, the buffer `*scratch*' is returned.
1261 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1262 (register Lisp_Object buffer
, Lisp_Object visible_ok
, Lisp_Object frame
)
1264 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1265 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1269 frame
= selected_frame
;
1271 CHECK_FRAME (frame
);
1273 tail
= Vbuffer_alist
;
1274 pred
= frame_buffer_predicate (frame
);
1276 /* Consider buffers that have been seen in the selected frame
1277 before other buffers. */
1279 tem
= frame_buffer_list (frame
);
1283 if (BUFFERP (XCAR (tem
)))
1284 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1287 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1289 for (; CONSP (tail
); tail
= XCDR (tail
))
1291 buf
= Fcdr (XCAR (tail
));
1292 if (EQ (buf
, buffer
))
1296 if (NILP (XBUFFER (buf
)->name
))
1298 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1300 /* If the selected frame has a buffer_predicate,
1301 disregard buffers that don't fit the predicate. */
1304 tem
= call1 (pred
, buf
);
1309 if (NILP (visible_ok
))
1310 tem
= Fget_buffer_window (buf
, Qvisible
);
1315 if (NILP (notsogood
))
1318 if (!NILP (notsogood
))
1320 buf
= Fget_buffer (build_string ("*scratch*"));
1323 buf
= Fget_buffer_create (build_string ("*scratch*"));
1324 Fset_buffer_major_mode (buf
);
1329 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1331 doc
: /* Start keeping undo information for buffer BUFFER.
1332 No argument or nil as argument means do this for the current buffer. */)
1333 (register Lisp_Object buffer
)
1335 Lisp_Object real_buffer
;
1338 XSETBUFFER (real_buffer
, current_buffer
);
1341 real_buffer
= Fget_buffer (buffer
);
1342 if (NILP (real_buffer
))
1346 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1347 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1353 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1354 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1355 The buffer being killed will be current while the hook is running.\n\
1358 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1359 doc
: /* Kill buffer BUFFER-OR-NAME.
1360 The argument may be a buffer or the name of an existing buffer.
1361 Argument nil or omitted means kill the current buffer. Return t if the
1362 buffer is actually killed, nil otherwise.
1364 This function calls `replace-buffer-in-windows' for cleaning up all
1365 windows currently displaying the buffer to be killed. The functions in
1366 `kill-buffer-query-functions' are called with the buffer to be killed as
1367 the current buffer. If any of them returns nil, the buffer is not
1368 killed. The hook `kill-buffer-hook' is run before the buffer is
1369 actually killed. The buffer being killed will be current while the hook
1372 Any processes that have this buffer as the `process-buffer' are killed
1374 (Lisp_Object buffer_or_name
)
1377 register struct buffer
*b
;
1378 register Lisp_Object tem
;
1379 register struct Lisp_Marker
*m
;
1380 struct gcpro gcpro1
;
1382 if (NILP (buffer_or_name
))
1383 buffer
= Fcurrent_buffer ();
1385 buffer
= Fget_buffer (buffer_or_name
);
1387 nsberror (buffer_or_name
);
1389 b
= XBUFFER (buffer
);
1391 /* Avoid trouble for buffer already dead. */
1395 /* Query if the buffer is still modified. */
1396 if (INTERACTIVE
&& !NILP (b
->filename
)
1397 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1400 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1401 b
->name
, make_number (0)));
1407 /* Run hooks with the buffer to be killed the current buffer. */
1409 int count
= SPECPDL_INDEX ();
1410 Lisp_Object arglist
[1];
1412 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1413 set_buffer_internal (b
);
1415 /* First run the query functions; if any query is answered no,
1416 don't kill the buffer. */
1417 arglist
[0] = Qkill_buffer_query_functions
;
1418 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1420 return unbind_to (count
, Qnil
);
1422 /* Then run the hooks. */
1423 Frun_hooks (1, &Qkill_buffer_hook
);
1424 unbind_to (count
, Qnil
);
1427 /* We have no more questions to ask. Verify that it is valid
1428 to kill the buffer. This must be done after the questions
1429 since anything can happen within do_yes_or_no_p. */
1431 /* Don't kill the minibuffer now current. */
1432 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1438 /* When we kill a base buffer, kill all its indirect buffers.
1439 We do it at this stage so nothing terrible happens if they
1440 ask questions or their hooks get errors. */
1441 if (! b
->base_buffer
)
1443 struct buffer
*other
;
1447 for (other
= all_buffers
; other
; other
= other
->next
)
1448 /* all_buffers contains dead buffers too;
1449 don't re-kill them. */
1450 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1453 XSETBUFFER (buffer
, other
);
1454 Fkill_buffer (buffer
);
1460 /* Make this buffer not be current.
1461 In the process, notice if this is the sole visible buffer
1462 and give up if so. */
1463 if (b
== current_buffer
)
1465 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1467 if (b
== current_buffer
)
1471 /* Notice if the buffer to kill is the sole visible buffer
1472 when we're currently in the mini-buffer, and give up if so. */
1473 XSETBUFFER (tem
, current_buffer
);
1474 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1476 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1477 if (EQ (buffer
, tem
))
1481 /* Now there is no question: we can kill the buffer. */
1483 #ifdef CLASH_DETECTION
1484 /* Unlock this buffer's file, if it is locked. */
1486 #endif /* CLASH_DETECTION */
1489 kill_buffer_processes (buffer
);
1492 /* Killing buffer processes may run sentinels which may
1493 have called kill-buffer. */
1498 clear_charpos_cache (b
);
1500 tem
= Vinhibit_quit
;
1502 replace_buffer_in_all_windows (buffer
);
1503 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1504 frames_discard_buffer (buffer
);
1505 Vinhibit_quit
= tem
;
1507 /* Delete any auto-save file, if we saved it in this session.
1508 But not if the buffer is modified. */
1509 if (STRINGP (b
->auto_save_file_name
)
1510 && BUF_AUTOSAVE_MODIFF (b
) != 0
1511 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1512 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1513 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1516 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1518 internal_delete_file (b
->auto_save_file_name
);
1523 /* Unchain all markers that belong to this indirect buffer.
1524 Don't unchain the markers that belong to the base buffer
1525 or its other indirect buffers. */
1526 for (m
= BUF_MARKERS (b
); m
; )
1528 struct Lisp_Marker
*next
= m
->next
;
1536 /* Unchain all markers of this buffer and its indirect buffers.
1537 and leave them pointing nowhere. */
1538 for (m
= BUF_MARKERS (b
); m
; )
1540 struct Lisp_Marker
*next
= m
->next
;
1545 BUF_MARKERS (b
) = NULL
;
1546 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1548 /* Perhaps we should explicitly free the interval tree here... */
1551 /* Reset the local variables, so that this buffer's local values
1552 won't be protected from GC. They would be protected
1553 if they happened to remain encached in their symbols.
1554 This gets rid of them for certain. */
1555 swap_out_buffer_local_variables (b
);
1556 reset_buffer_local_variables (b
, 1);
1561 if (! b
->base_buffer
)
1562 free_buffer_text (b
);
1564 if (b
->newline_cache
)
1566 free_region_cache (b
->newline_cache
);
1567 b
->newline_cache
= 0;
1569 if (b
->width_run_cache
)
1571 free_region_cache (b
->width_run_cache
);
1572 b
->width_run_cache
= 0;
1574 b
->width_table
= Qnil
;
1576 b
->undo_list
= Qnil
;
1581 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1582 we do this each time BUF is selected visibly, the more recently
1583 selected buffers are always closer to the front of the list. This
1584 means that other_buffer is more likely to choose a relevant buffer. */
1587 record_buffer (Lisp_Object buf
)
1589 register Lisp_Object link
, prev
;
1591 frame
= selected_frame
;
1594 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1596 if (EQ (XCDR (XCAR (link
)), buf
))
1601 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1602 we cannot use Fdelq itself here because it allows quitting. */
1605 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1607 XSETCDR (prev
, XCDR (XCDR (prev
)));
1609 XSETCDR (link
, Vbuffer_alist
);
1610 Vbuffer_alist
= link
;
1612 /* Effectively do a delq on buried_buffer_list. */
1615 for (link
= XFRAME (frame
)->buried_buffer_list
; CONSP (link
);
1618 if (EQ (XCAR (link
), buf
))
1621 XFRAME (frame
)->buried_buffer_list
= XCDR (link
);
1623 XSETCDR (prev
, XCDR (XCDR (prev
)));
1629 /* Now move this buffer to the front of frame_buffer_list also. */
1632 for (link
= frame_buffer_list (frame
); CONSP (link
);
1635 if (EQ (XCAR (link
), buf
))
1640 /* Effectively do delq. */
1645 set_frame_buffer_list (frame
,
1646 XCDR (frame_buffer_list (frame
)));
1648 XSETCDR (prev
, XCDR (XCDR (prev
)));
1650 XSETCDR (link
, frame_buffer_list (frame
));
1651 set_frame_buffer_list (frame
, link
);
1654 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1657 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1658 doc
: /* Set an appropriate major mode for BUFFER.
1659 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1660 according to `default-major-mode'.
1661 Use this function before selecting the buffer, since it may need to inspect
1662 the current buffer's major mode. */)
1663 (Lisp_Object buffer
)
1666 Lisp_Object function
;
1668 CHECK_BUFFER (buffer
);
1670 if (STRINGP (XBUFFER (buffer
)->name
)
1671 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1672 function
= find_symbol_value (intern ("initial-major-mode"));
1675 function
= buffer_defaults
.major_mode
;
1677 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1678 function
= current_buffer
->major_mode
;
1681 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1684 count
= SPECPDL_INDEX ();
1686 /* To select a nonfundamental mode,
1687 select the buffer temporarily and then call the mode function. */
1689 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1691 Fset_buffer (buffer
);
1694 return unbind_to (count
, Qnil
);
1697 /* Switch to buffer BUFFER in the selected window.
1698 If NORECORD is non-nil, don't call record_buffer. */
1701 switch_to_buffer_1 (Lisp_Object buffer_or_name
, Lisp_Object norecord
)
1703 register Lisp_Object buffer
;
1705 if (NILP (buffer_or_name
))
1706 buffer
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1709 buffer
= Fget_buffer (buffer_or_name
);
1712 buffer
= Fget_buffer_create (buffer_or_name
);
1713 Fset_buffer_major_mode (buffer
);
1716 Fset_buffer (buffer
);
1717 if (NILP (norecord
))
1718 record_buffer (buffer
);
1720 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1721 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1728 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2,
1729 "(list (read-buffer-to-switch \"Switch to buffer: \"))",
1730 doc
: /* Make BUFFER-OR-NAME current and display it in selected window.
1731 BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or
1732 nil. Return the buffer switched to.
1734 If BUFFER-OR-NAME is a string and does not identify an existing
1735 buffer, create a new buffer with that name. Interactively, if
1736 `confirm-nonexistent-file-or-buffer' is non-nil, request
1737 confirmation before creating a new buffer. If BUFFER-OR-NAME is
1738 nil, switch to buffer returned by `other-buffer'.
1740 Optional second arg NORECORD non-nil means do not put this buffer
1741 at the front of the list of recently selected ones. This
1742 function returns the buffer it switched to as a Lisp object.
1744 If the selected window is the minibuffer window or dedicated to
1745 its buffer, use `pop-to-buffer' for displaying the buffer.
1747 WARNING: This is NOT the way to work on another buffer temporarily
1748 within a Lisp program! Use `set-buffer' instead. That avoids
1749 messing with the window-buffer correspondences. */)
1750 (Lisp_Object buffer_or_name
, Lisp_Object norecord
)
1752 if (EQ (buffer_or_name
, Fwindow_buffer (selected_window
)))
1754 /* Basically a NOP. Avoid signalling an error in the case where
1755 the selected window is dedicated, or a minibuffer. */
1757 /* But do put this buffer at the front of the buffer list, unless
1758 that has been inhibited. Note that even if BUFFER-OR-NAME is
1759 at the front of the main buffer-list already, we still want to
1760 move it to the front of the frame's buffer list. */
1761 if (NILP (norecord
))
1762 record_buffer (buffer_or_name
);
1763 return Fset_buffer (buffer_or_name
);
1765 else if (EQ (minibuf_window
, selected_window
)
1766 /* If `dedicated' is neither nil nor t, it means it's
1767 dedicatedness can be overridden by an explicit request
1768 such as a call to switch-to-buffer. */
1769 || EQ (Fwindow_dedicated_p (selected_window
), Qt
))
1770 /* We can't use the selected window so let `pop-to-buffer' try some
1772 return call3 (intern ("pop-to-buffer"), buffer_or_name
, Qnil
, norecord
);
1774 return switch_to_buffer_1 (buffer_or_name
, norecord
);
1777 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1778 doc
: /* Return the current buffer as a Lisp object. */)
1781 register Lisp_Object buf
;
1782 XSETBUFFER (buf
, current_buffer
);
1786 /* Set the current buffer to B.
1788 We previously set windows_or_buffers_changed here to invalidate
1789 global unchanged information in beg_unchanged and end_unchanged.
1790 This is no longer necessary because we now compute unchanged
1791 information on a buffer-basis. Every action affecting other
1792 windows than the selected one requires a select_window at some
1793 time, and that increments windows_or_buffers_changed. */
1796 set_buffer_internal (register struct buffer
*b
)
1798 if (current_buffer
!= b
)
1799 set_buffer_internal_1 (b
);
1802 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1803 This is used by redisplay. */
1806 set_buffer_internal_1 (register struct buffer
*b
)
1808 register struct buffer
*old_buf
;
1809 register Lisp_Object tail
;
1811 #ifdef USE_MMAP_FOR_BUFFERS
1812 if (b
->text
->beg
== NULL
)
1813 enlarge_buffer_text (b
, 0);
1814 #endif /* USE_MMAP_FOR_BUFFERS */
1816 if (current_buffer
== b
)
1819 old_buf
= current_buffer
;
1821 last_known_column_point
= -1; /* invalidate indentation cache */
1825 /* Put the undo list back in the base buffer, so that it appears
1826 that an indirect buffer shares the undo list of its base. */
1827 if (old_buf
->base_buffer
)
1828 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1830 /* If the old current buffer has markers to record PT, BEGV and ZV
1831 when it is not current, update them now. */
1832 if (! NILP (old_buf
->pt_marker
))
1835 XSETBUFFER (obuf
, old_buf
);
1836 set_marker_both (old_buf
->pt_marker
, obuf
,
1837 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1839 if (! NILP (old_buf
->begv_marker
))
1842 XSETBUFFER (obuf
, old_buf
);
1843 set_marker_both (old_buf
->begv_marker
, obuf
,
1844 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1846 if (! NILP (old_buf
->zv_marker
))
1849 XSETBUFFER (obuf
, old_buf
);
1850 set_marker_both (old_buf
->zv_marker
, obuf
,
1851 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1855 /* Get the undo list from the base buffer, so that it appears
1856 that an indirect buffer shares the undo list of its base. */
1858 b
->undo_list
= b
->base_buffer
->undo_list
;
1860 /* If the new current buffer has markers to record PT, BEGV and ZV
1861 when it is not current, fetch them now. */
1862 if (! NILP (b
->pt_marker
))
1864 BUF_PT (b
) = marker_position (b
->pt_marker
);
1865 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1867 if (! NILP (b
->begv_marker
))
1869 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1870 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1872 if (! NILP (b
->zv_marker
))
1874 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1875 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1878 /* Look down buffer's list of local Lisp variables
1879 to find and update any that forward into C variables. */
1883 for (tail
= b
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1885 Lisp_Object var
= XCAR (XCAR (tail
));
1886 struct Lisp_Symbol
*sym
= XSYMBOL (var
);
1887 if (sym
->redirect
== SYMBOL_LOCALIZED
/* Just to be sure. */
1888 && SYMBOL_BLV (sym
)->fwd
)
1889 /* Just reference the variable
1890 to cause it to become set for this buffer. */
1891 Fsymbol_value (var
);
1894 /* Do the same with any others that were local to the previous buffer */
1895 while (b
!= old_buf
&& (b
= old_buf
, b
));
1898 /* Switch to buffer B temporarily for redisplay purposes.
1899 This avoids certain things that don't need to be done within redisplay. */
1902 set_buffer_temp (struct buffer
*b
)
1904 register struct buffer
*old_buf
;
1906 if (current_buffer
== b
)
1909 old_buf
= current_buffer
;
1914 /* If the old current buffer has markers to record PT, BEGV and ZV
1915 when it is not current, update them now. */
1916 if (! NILP (old_buf
->pt_marker
))
1919 XSETBUFFER (obuf
, old_buf
);
1920 set_marker_both (old_buf
->pt_marker
, obuf
,
1921 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1923 if (! NILP (old_buf
->begv_marker
))
1926 XSETBUFFER (obuf
, old_buf
);
1927 set_marker_both (old_buf
->begv_marker
, obuf
,
1928 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1930 if (! NILP (old_buf
->zv_marker
))
1933 XSETBUFFER (obuf
, old_buf
);
1934 set_marker_both (old_buf
->zv_marker
, obuf
,
1935 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1939 /* If the new current buffer has markers to record PT, BEGV and ZV
1940 when it is not current, fetch them now. */
1941 if (! NILP (b
->pt_marker
))
1943 BUF_PT (b
) = marker_position (b
->pt_marker
);
1944 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1946 if (! NILP (b
->begv_marker
))
1948 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1949 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1951 if (! NILP (b
->zv_marker
))
1953 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1954 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1958 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1959 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
1960 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
1961 also `save-excursion' when you want to make a buffer current
1962 temporarily. This function does not display the buffer, so its effect
1963 ends when the current command terminates. Use `switch-to-buffer' or
1964 `pop-to-buffer' to switch buffers permanently. */)
1965 (register Lisp_Object buffer_or_name
)
1967 register Lisp_Object buffer
;
1968 buffer
= Fget_buffer (buffer_or_name
);
1970 nsberror (buffer_or_name
);
1971 if (NILP (XBUFFER (buffer
)->name
))
1972 error ("Selecting deleted buffer");
1973 set_buffer_internal (XBUFFER (buffer
));
1977 /* Set the current buffer to BUFFER provided it is alive. */
1980 set_buffer_if_live (Lisp_Object 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 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
1998 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1999 doc
: /* Put BUFFER-OR-NAME 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
2004 The argument may be a buffer name or an actual buffer object. If
2005 BUFFER-OR-NAME is nil or omitted, bury the current buffer and remove it
2006 from the selected window if it is displayed there. If the selected
2007 window is dedicated to its buffer, delete that window if there are other
2008 windows on the same frame. If the selected window is the only window on
2009 its frame, iconify that frame. */)
2010 (register Lisp_Object buffer_or_name
)
2014 /* Figure out what buffer we're going to bury. */
2015 if (NILP (buffer_or_name
))
2018 XSETBUFFER (buffer
, current_buffer
);
2020 tem
= Fwindow_buffer (selected_window
);
2021 /* If we're burying the current buffer, unshow it. */
2022 if (EQ (buffer
, tem
))
2024 if (NILP (Fwindow_dedicated_p (selected_window
)))
2025 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
2026 else if (NILP (XWINDOW (selected_window
)->parent
))
2027 Ficonify_frame (Fwindow_frame (selected_window
));
2029 Fdelete_window (selected_window
);
2034 buffer
= Fget_buffer (buffer_or_name
);
2036 nsberror (buffer_or_name
);
2039 /* Move buffer to the end of the buffer list. Do nothing if the
2040 buffer is killed. */
2041 if (!NILP (XBUFFER (buffer
)->name
))
2043 Lisp_Object aelt
, link
;
2045 aelt
= Frassq (buffer
, Vbuffer_alist
);
2046 link
= Fmemq (aelt
, Vbuffer_alist
);
2047 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
2048 XSETCDR (link
, Qnil
);
2049 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
2051 XFRAME (selected_frame
)->buffer_list
2052 = Fdelq (buffer
, XFRAME (selected_frame
)->buffer_list
);
2053 XFRAME (selected_frame
)->buried_buffer_list
2054 = Fcons (buffer
, Fdelq (buffer
, XFRAME (selected_frame
)->buried_buffer_list
));
2060 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2061 doc
: /* Delete the entire contents of the current buffer.
2062 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2063 so the buffer is truly empty after this. */)
2070 current_buffer
->last_window_start
= 1;
2071 /* Prevent warnings, or suspension of auto saving, that would happen
2072 if future size is less than past size. Use of erase-buffer
2073 implies that the future text is not really related to the past text. */
2074 XSETFASTINT (current_buffer
->save_length
, 0);
2079 validate_region (register Lisp_Object
*b
, register Lisp_Object
*e
)
2081 CHECK_NUMBER_COERCE_MARKER (*b
);
2082 CHECK_NUMBER_COERCE_MARKER (*e
);
2084 if (XINT (*b
) > XINT (*e
))
2087 tem
= *b
; *b
= *e
; *e
= tem
;
2090 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2091 && XINT (*e
) <= ZV
))
2092 args_out_of_range (*b
, *e
);
2095 /* Advance BYTE_POS up to a character boundary
2096 and return the adjusted position. */
2099 advance_to_char_boundary (int 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. */
2132 extern void r_alloc_reset_variable (POINTER_TYPE
*, POINTER_TYPE
*);
2133 #endif /* REL_ALLOC */
2135 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2137 doc
: /* Swap the text between current buffer and BUFFER. */)
2138 (Lisp_Object buffer
)
2140 struct buffer
*other_buffer
;
2141 CHECK_BUFFER (buffer
);
2142 other_buffer
= XBUFFER (buffer
);
2144 if (NILP (other_buffer
->name
))
2145 error ("Cannot swap a dead buffer's text");
2147 /* Actually, it probably works just fine.
2148 * if (other_buffer == current_buffer)
2149 * error ("Cannot swap a buffer's text with itself"); */
2151 /* Actually, this may be workable as well, tho probably only if they're
2153 if (other_buffer
->base_buffer
2154 || current_buffer
->base_buffer
)
2155 error ("Cannot swap indirect buffers's text");
2157 { /* This is probably harder to make work. */
2158 struct buffer
*other
;
2159 for (other
= all_buffers
; other
; other
= other
->next
)
2160 if (other
->base_buffer
== other_buffer
2161 || other
->base_buffer
== current_buffer
)
2162 error ("One of the buffers to swap has indirect buffers");
2165 #define swapfield(field, type) \
2167 type tmp##field = other_buffer->field; \
2168 other_buffer->field = current_buffer->field; \
2169 current_buffer->field = tmp##field; \
2172 swapfield (own_text
, struct buffer_text
);
2173 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2174 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2176 r_alloc_reset_variable ((POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
,
2177 (POINTER_TYPE
**) &other_buffer
->own_text
.beg
);
2178 r_alloc_reset_variable ((POINTER_TYPE
**) &other_buffer
->own_text
.beg
,
2179 (POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
);
2180 #endif /* REL_ALLOC */
2182 swapfield (pt
, EMACS_INT
);
2183 swapfield (pt_byte
, EMACS_INT
);
2184 swapfield (begv
, EMACS_INT
);
2185 swapfield (begv_byte
, EMACS_INT
);
2186 swapfield (zv
, EMACS_INT
);
2187 swapfield (zv_byte
, EMACS_INT
);
2188 eassert (!current_buffer
->base_buffer
);
2189 eassert (!other_buffer
->base_buffer
);
2190 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2191 swapfield (newline_cache
, struct region_cache
*);
2192 swapfield (width_run_cache
, struct region_cache
*);
2193 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2194 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2195 swapfield (overlays_before
, struct Lisp_Overlay
*);
2196 swapfield (overlays_after
, struct Lisp_Overlay
*);
2197 swapfield (overlay_center
, EMACS_INT
);
2198 swapfield (undo_list
, Lisp_Object
);
2199 swapfield (mark
, Lisp_Object
);
2200 swapfield (enable_multibyte_characters
, Lisp_Object
);
2201 swapfield (bidi_display_reordering
, Lisp_Object
);
2202 swapfield (bidi_paragraph_direction
, Lisp_Object
);
2203 /* FIXME: Not sure what we should do with these *_marker fields.
2204 Hopefully they're just nil anyway. */
2205 swapfield (pt_marker
, Lisp_Object
);
2206 swapfield (begv_marker
, Lisp_Object
);
2207 swapfield (zv_marker
, Lisp_Object
);
2208 current_buffer
->point_before_scroll
= Qnil
;
2209 other_buffer
->point_before_scroll
= Qnil
;
2211 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2212 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2213 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2214 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2215 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2216 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2217 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2219 struct Lisp_Marker
*m
;
2220 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2221 if (m
->buffer
== other_buffer
)
2222 m
->buffer
= current_buffer
;
2224 /* Since there's no indirect buffer in sight, markers on
2225 BUF_MARKERS(buf) should either be for `buf' or dead. */
2226 eassert (!m
->buffer
);
2227 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2228 if (m
->buffer
== current_buffer
)
2229 m
->buffer
= other_buffer
;
2231 /* Since there's no indirect buffer in sight, markers on
2232 BUF_MARKERS(buf) should either be for `buf' or dead. */
2233 eassert (!m
->buffer
);
2235 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2236 So since we just swapped the markers between the two buffers, we need
2237 to undo the effect of this swap for window markers. */
2238 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2239 Lisp_Object buf1
, buf2
;
2240 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2242 while (NILP (Fmemq (w
, ws
)))
2245 if (MARKERP (XWINDOW (w
)->pointm
)
2246 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2247 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2248 Fset_marker (XWINDOW (w
)->pointm
,
2249 make_number (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2250 XWINDOW (w
)->buffer
);
2251 w
= Fnext_window (w
, Qt
, Qt
);
2255 if (current_buffer
->text
->intervals
)
2256 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2257 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2258 if (other_buffer
->text
->intervals
)
2259 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2260 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2265 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2267 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2268 If FLAG is t, this makes the buffer a multibyte buffer.
2269 If FLAG is nil, this makes the buffer a single-byte buffer.
2270 In these cases, the buffer contents remain unchanged as a sequence of
2271 bytes but the contents viewed as characters do change.
2272 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2273 all eight-bit bytes to eight-bit characters.
2274 If the multibyte flag was really changed, undo information of the
2275 current buffer is cleared. */)
2278 struct Lisp_Marker
*tail
, *markers
;
2279 struct buffer
*other
;
2281 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2282 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2283 Lisp_Object old_undo
= current_buffer
->undo_list
;
2284 struct gcpro gcpro1
;
2286 if (current_buffer
->base_buffer
)
2287 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2289 /* Do nothing if nothing actually changes. */
2290 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2295 /* Don't record these buffer changes. We will put a special undo entry
2297 current_buffer
->undo_list
= Qt
;
2299 /* If the cached position is for this buffer, clear it out. */
2300 clear_charpos_cache (current_buffer
);
2303 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2305 begv
= BEGV
, zv
= ZV
;
2315 /* Do this first, so it can use CHAR_TO_BYTE
2316 to calculate the old correspondences. */
2317 set_intervals_multibyte (0);
2319 current_buffer
->enable_multibyte_characters
= Qnil
;
2325 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2328 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2329 tail
->charpos
= tail
->bytepos
;
2331 /* Convert multibyte form of 8-bit characters to unibyte. */
2346 if (ASCII_BYTE_P (*p
))
2348 else if (CHAR_BYTE8_HEAD_P (*p
))
2350 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2351 /* Delete all bytes for this 8-bit character but the
2352 last one, and change the last one to the charcter
2355 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2367 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2368 p
+= bytes
, pos
+= bytes
;
2372 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2378 unsigned char *p
, *pend
;
2380 /* Be sure not to have a multibyte sequence striding over the GAP.
2381 Ex: We change this: "...abc\302 _GAP_ \241def..."
2382 to: "...abc _GAP_ \302\241def..." */
2385 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2386 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2388 unsigned char *p
= GPT_ADDR
- 1;
2390 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2391 if (LEADING_CODE_P (*p
))
2393 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2395 move_gap_both (new_gpt
, new_gpt
);
2399 /* Make the buffer contents valid as multibyte by converting
2400 8-bit characters to multibyte form. */
2418 if (ASCII_BYTE_P (*p
))
2420 else if (EQ (flag
, Qt
)
2421 && ! CHAR_BYTE8_HEAD_P (*p
)
2422 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2423 p
+= bytes
, pos
+= bytes
;
2426 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2429 c
= BYTE8_TO_CHAR (*p
);
2430 bytes
= CHAR_STRING (c
, tmp
);
2432 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2434 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2435 /* Now the gap is after the just inserted data. */
2453 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2455 /* Do this first, so that chars_in_text asks the right question.
2456 set_intervals_multibyte needs it too. */
2457 current_buffer
->enable_multibyte_characters
= Qt
;
2459 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2460 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2462 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2464 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2465 if (BEGV_BYTE
> GPT_BYTE
)
2466 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2468 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2470 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2471 if (ZV_BYTE
> GPT_BYTE
)
2472 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2474 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2477 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2480 if (pt_byte
> GPT_BYTE
)
2481 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2483 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2484 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2487 tail
= markers
= BUF_MARKERS (current_buffer
);
2489 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2490 getting confused by the markers that have not yet been updated.
2491 It is also a signal that it should never create a marker. */
2492 BUF_MARKERS (current_buffer
) = NULL
;
2494 for (; tail
; tail
= tail
->next
)
2496 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2497 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2500 /* Make sure no markers were put on the chain
2501 while the chain value was incorrect. */
2502 if (BUF_MARKERS (current_buffer
))
2505 BUF_MARKERS (current_buffer
) = markers
;
2507 /* Do this last, so it can calculate the new correspondences
2508 between chars and bytes. */
2509 set_intervals_multibyte (1);
2512 if (!EQ (old_undo
, Qt
))
2514 /* Represent all the above changes by a special undo entry. */
2515 current_buffer
->undo_list
= Fcons (list3 (Qapply
,
2516 intern ("set-buffer-multibyte"),
2517 NILP (flag
) ? Qt
: Qnil
),
2523 /* Changing the multibyteness of a buffer means that all windows
2524 showing that buffer must be updated thoroughly. */
2525 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2526 ++windows_or_buffers_changed
;
2528 /* Copy this buffer's new multibyte status
2529 into all of its indirect buffers. */
2530 for (other
= all_buffers
; other
; other
= other
->next
)
2531 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2533 other
->enable_multibyte_characters
2534 = current_buffer
->enable_multibyte_characters
;
2535 other
->prevent_redisplay_optimizations_p
= 1;
2538 /* Restore the modifiedness of the buffer. */
2539 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2540 Fset_buffer_modified_p (Qnil
);
2542 /* Update coding systems of this buffer's process (if any). */
2544 Lisp_Object process
;
2546 process
= Fget_buffer_process (Fcurrent_buffer ());
2547 if (PROCESSP (process
))
2548 setup_process_coding_systems (process
);
2554 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2556 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2557 Most local variable bindings are eliminated so that the default values
2558 become effective once more. Also, the syntax table is set from
2559 `standard-syntax-table', the local keymap is set to nil,
2560 and the abbrev table from `fundamental-mode-abbrev-table'.
2561 This function also forces redisplay of the mode line.
2563 Every function to select a new major mode starts by
2564 calling this function.
2566 As a special exception, local variables whose names have
2567 a non-nil `permanent-local' property are not eliminated by this function.
2569 The first thing this function does is run
2570 the normal hook `change-major-mode-hook'. */)
2573 if (!NILP (Vrun_hooks
))
2574 call1 (Vrun_hooks
, Qchange_major_mode_hook
);
2576 /* Make sure none of the bindings in local_var_alist
2577 remain swapped in, in their symbols. */
2579 swap_out_buffer_local_variables (current_buffer
);
2581 /* Actually eliminate all local bindings of this buffer. */
2583 reset_buffer_local_variables (current_buffer
, 0);
2585 /* Force mode-line redisplay. Useful here because all major mode
2586 commands call this function. */
2587 update_mode_lines
++;
2592 /* Make sure no local variables remain set up with buffer B
2593 for their current values. */
2596 swap_out_buffer_local_variables (struct buffer
*b
)
2598 Lisp_Object oalist
, alist
, buffer
;
2600 XSETBUFFER (buffer
, b
);
2601 oalist
= b
->local_var_alist
;
2603 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2605 Lisp_Object sym
= XCAR (XCAR (alist
));
2606 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2607 /* Need not do anything if some other buffer's binding is
2609 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2611 /* Symbol is set up for this buffer's old local value:
2613 swap_in_global_binding (XSYMBOL (sym
));
2618 /* Find all the overlays in the current buffer that contain position POS.
2619 Return the number found, and store them in a vector in *VEC_PTR.
2620 Store in *LEN_PTR the size allocated for the vector.
2621 Store in *NEXT_PTR the next position after POS where an overlay starts,
2622 or ZV if there are no more overlays between POS and ZV.
2623 Store in *PREV_PTR the previous position before POS where an overlay ends,
2624 or where an overlay starts which ends at or after POS;
2625 or BEGV if there are no such overlays from BEGV to POS.
2626 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2628 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2629 when this function is called.
2631 If EXTEND is non-zero, we make the vector bigger if necessary.
2632 If EXTEND is zero, we never extend the vector,
2633 and we store only as many overlays as will fit.
2634 But we still return the total number of overlays.
2636 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2637 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2638 default (BEGV or ZV). */
2641 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
, int *len_ptr
,
2642 EMACS_INT
*next_ptr
, EMACS_INT
*prev_ptr
, int change_req
)
2644 Lisp_Object overlay
, start
, end
;
2645 struct Lisp_Overlay
*tail
;
2648 Lisp_Object
*vec
= *vec_ptr
;
2651 int inhibit_storing
= 0;
2653 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2655 int startpos
, endpos
;
2657 XSETMISC (overlay
, tail
);
2659 start
= OVERLAY_START (overlay
);
2660 end
= OVERLAY_END (overlay
);
2661 endpos
= OVERLAY_POSITION (end
);
2668 startpos
= OVERLAY_POSITION (start
);
2669 /* This one ends at or after POS
2670 so its start counts for PREV_PTR if it's before POS. */
2671 if (prev
< startpos
&& startpos
< pos
)
2675 if (startpos
<= pos
)
2679 /* The supplied vector is full.
2680 Either make it bigger, or don't store any more in it. */
2683 /* Make it work with an initial len == 0. */
2688 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2692 inhibit_storing
= 1;
2695 if (!inhibit_storing
)
2697 /* Keep counting overlays even if we can't return them all. */
2700 else if (startpos
< next
)
2704 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2706 int startpos
, endpos
;
2708 XSETMISC (overlay
, tail
);
2710 start
= OVERLAY_START (overlay
);
2711 end
= OVERLAY_END (overlay
);
2712 startpos
= OVERLAY_POSITION (start
);
2715 if (startpos
< next
)
2719 endpos
= OVERLAY_POSITION (end
);
2726 /* Make it work with an initial len == 0. */
2731 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2735 inhibit_storing
= 1;
2738 if (!inhibit_storing
)
2742 if (startpos
< pos
&& startpos
> prev
)
2745 else if (endpos
< pos
&& endpos
> prev
)
2747 else if (endpos
== pos
&& startpos
> prev
2748 && (!change_req
|| startpos
< pos
))
2759 /* Find all the overlays in the current buffer that overlap the range
2760 BEG-END, or are empty at BEG, or are empty at END provided END
2761 denotes the position at the end of the current buffer.
2763 Return the number found, and store them in a vector in *VEC_PTR.
2764 Store in *LEN_PTR the size allocated for the vector.
2765 Store in *NEXT_PTR the next position after POS where an overlay starts,
2766 or ZV if there are no more overlays.
2767 Store in *PREV_PTR the previous position before POS where an overlay ends,
2768 or BEGV if there are no previous overlays.
2769 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2771 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2772 when this function is called.
2774 If EXTEND is non-zero, we make the vector bigger if necessary.
2775 If EXTEND is zero, we never extend the vector,
2776 and we store only as many overlays as will fit.
2777 But we still return the total number of overlays. */
2780 overlays_in (int beg
, int end
, int extend
, Lisp_Object
**vec_ptr
, int *len_ptr
,
2781 int *next_ptr
, int *prev_ptr
)
2783 Lisp_Object overlay
, ostart
, oend
;
2784 struct Lisp_Overlay
*tail
;
2787 Lisp_Object
*vec
= *vec_ptr
;
2790 int inhibit_storing
= 0;
2791 int end_is_Z
= end
== Z
;
2793 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2795 int startpos
, endpos
;
2797 XSETMISC (overlay
, tail
);
2799 ostart
= OVERLAY_START (overlay
);
2800 oend
= OVERLAY_END (overlay
);
2801 endpos
= OVERLAY_POSITION (oend
);
2808 startpos
= OVERLAY_POSITION (ostart
);
2809 /* Count an interval if it overlaps the range, is empty at the
2810 start of the range, or is empty at END provided END denotes the
2811 end of the buffer. */
2812 if ((beg
< endpos
&& startpos
< end
)
2813 || (startpos
== endpos
2814 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2818 /* The supplied vector is full.
2819 Either make it bigger, or don't store any more in it. */
2822 /* Make it work with an initial len == 0. */
2827 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2831 inhibit_storing
= 1;
2834 if (!inhibit_storing
)
2836 /* Keep counting overlays even if we can't return them all. */
2839 else if (startpos
< next
)
2843 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2845 int startpos
, endpos
;
2847 XSETMISC (overlay
, tail
);
2849 ostart
= OVERLAY_START (overlay
);
2850 oend
= OVERLAY_END (overlay
);
2851 startpos
= OVERLAY_POSITION (ostart
);
2854 if (startpos
< next
)
2858 endpos
= OVERLAY_POSITION (oend
);
2859 /* Count an interval if it overlaps the range, is empty at the
2860 start of the range, or is empty at END provided END denotes the
2861 end of the buffer. */
2862 if ((beg
< endpos
&& startpos
< end
)
2863 || (startpos
== endpos
2864 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2870 /* Make it work with an initial len == 0. */
2875 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2879 inhibit_storing
= 1;
2882 if (!inhibit_storing
)
2886 else if (endpos
< beg
&& endpos
> prev
)
2898 /* Return non-zero if there exists an overlay with a non-nil
2899 `mouse-face' property overlapping OVERLAY. */
2902 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2904 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2905 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2907 Lisp_Object
*v
, tem
;
2910 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2911 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2914 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2915 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2918 for (i
= 0; i
< n
; ++i
)
2919 if (!EQ (v
[i
], overlay
)
2920 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2929 /* Fast function to just test if we're at an overlay boundary. */
2931 overlay_touches_p (int pos
)
2933 Lisp_Object overlay
;
2934 struct Lisp_Overlay
*tail
;
2936 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2940 XSETMISC (overlay
,tail
);
2941 if (!OVERLAYP (overlay
))
2944 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2947 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2951 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2955 XSETMISC (overlay
, tail
);
2956 if (!OVERLAYP (overlay
))
2959 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2962 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2970 Lisp_Object overlay
;
2976 compare_overlays (const void *v1
, const void *v2
)
2978 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2979 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2980 if (s1
->priority
!= s2
->priority
)
2981 return s1
->priority
- s2
->priority
;
2982 if (s1
->beg
!= s2
->beg
)
2983 return s1
->beg
- s2
->beg
;
2984 if (s1
->end
!= s2
->end
)
2985 return s2
->end
- s1
->end
;
2989 /* Sort an array of overlays by priority. The array is modified in place.
2990 The return value is the new size; this may be smaller than the original
2991 size if some of the overlays were invalid or were window-specific. */
2993 sort_overlays (Lisp_Object
*overlay_vec
, int noverlays
, struct window
*w
)
2996 struct sortvec
*sortvec
;
2997 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2999 /* Put the valid and relevant overlays into sortvec. */
3001 for (i
= 0, j
= 0; i
< noverlays
; i
++)
3004 Lisp_Object overlay
;
3006 overlay
= overlay_vec
[i
];
3007 if (OVERLAY_VALID (overlay
)
3008 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
3009 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
3011 /* If we're interested in a specific window, then ignore
3012 overlays that are limited to some other window. */
3017 window
= Foverlay_get (overlay
, Qwindow
);
3018 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3022 /* This overlay is good and counts: put it into sortvec. */
3023 sortvec
[j
].overlay
= overlay
;
3024 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3025 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3026 tem
= Foverlay_get (overlay
, Qpriority
);
3028 sortvec
[j
].priority
= XINT (tem
);
3030 sortvec
[j
].priority
= 0;
3036 /* Sort the overlays into the proper order: increasing priority. */
3039 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
3041 for (i
= 0; i
< noverlays
; i
++)
3042 overlay_vec
[i
] = sortvec
[i
].overlay
;
3048 Lisp_Object string
, string2
;
3055 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
3056 int size
; /* Allocated length of that array. */
3057 int used
; /* How much of the array is currently in use. */
3058 int bytes
; /* Total length of the strings in buf. */
3061 /* Buffers for storing information about the overlays touching a given
3062 position. These could be automatic variables in overlay_strings, but
3063 it's more efficient to hold onto the memory instead of repeatedly
3064 allocating and freeing it. */
3065 static struct sortstrlist overlay_heads
, overlay_tails
;
3066 static unsigned char *overlay_str_buf
;
3068 /* Allocated length of overlay_str_buf. */
3069 static int overlay_str_len
;
3071 /* A comparison function suitable for passing to qsort. */
3073 cmp_for_strings (const void *as1
, const void *as2
)
3075 struct sortstr
*s1
= (struct sortstr
*)as1
;
3076 struct sortstr
*s2
= (struct sortstr
*)as2
;
3077 if (s1
->size
!= s2
->size
)
3078 return s2
->size
- s1
->size
;
3079 if (s1
->priority
!= s2
->priority
)
3080 return s1
->priority
- s2
->priority
;
3085 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
, Lisp_Object str2
, Lisp_Object pri
, int size
)
3089 if (ssl
->used
== ssl
->size
)
3095 ssl
->buf
= ((struct sortstr
*)
3096 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
3098 ssl
->buf
[ssl
->used
].string
= str
;
3099 ssl
->buf
[ssl
->used
].string2
= str2
;
3100 ssl
->buf
[ssl
->used
].size
= size
;
3101 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
3104 if (NILP (current_buffer
->enable_multibyte_characters
))
3105 nbytes
= SCHARS (str
);
3106 else if (! STRING_MULTIBYTE (str
))
3107 nbytes
= count_size_as_multibyte (SDATA (str
),
3110 nbytes
= SBYTES (str
);
3112 ssl
->bytes
+= nbytes
;
3116 if (NILP (current_buffer
->enable_multibyte_characters
))
3117 nbytes
= SCHARS (str2
);
3118 else if (! STRING_MULTIBYTE (str2
))
3119 nbytes
= count_size_as_multibyte (SDATA (str2
),
3122 nbytes
= SBYTES (str2
);
3124 ssl
->bytes
+= nbytes
;
3128 /* Return the concatenation of the strings associated with overlays that
3129 begin or end at POS, ignoring overlays that are specific to a window
3130 other than W. The strings are concatenated in the appropriate order:
3131 shorter overlays nest inside longer ones, and higher priority inside
3132 lower. Normally all of the after-strings come first, but zero-sized
3133 overlays have their after-strings ride along with the before-strings
3134 because it would look strange to print them inside-out.
3136 Returns the string length, and stores the contents indirectly through
3137 PSTR, if that variable is non-null. The string may be overwritten by
3138 subsequent calls. */
3141 overlay_strings (EMACS_INT pos
, struct window
*w
, unsigned char **pstr
)
3143 Lisp_Object overlay
, window
, str
;
3144 struct Lisp_Overlay
*ov
;
3145 int startpos
, endpos
;
3146 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
3148 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3149 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3150 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3152 XSETMISC (overlay
, ov
);
3153 eassert (OVERLAYP (overlay
));
3155 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3156 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3159 if (endpos
!= pos
&& startpos
!= pos
)
3161 window
= Foverlay_get (overlay
, Qwindow
);
3162 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3165 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3166 record_overlay_string (&overlay_heads
, str
,
3168 ? Foverlay_get (overlay
, Qafter_string
)
3170 Foverlay_get (overlay
, Qpriority
),
3172 else if (endpos
== pos
3173 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3174 record_overlay_string (&overlay_tails
, str
, Qnil
,
3175 Foverlay_get (overlay
, Qpriority
),
3178 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3180 XSETMISC (overlay
, ov
);
3181 eassert (OVERLAYP (overlay
));
3183 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3184 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3187 if (endpos
!= pos
&& startpos
!= pos
)
3189 window
= Foverlay_get (overlay
, Qwindow
);
3190 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3193 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3194 record_overlay_string (&overlay_heads
, str
,
3196 ? Foverlay_get (overlay
, Qafter_string
)
3198 Foverlay_get (overlay
, Qpriority
),
3200 else if (endpos
== pos
3201 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3202 record_overlay_string (&overlay_tails
, str
, Qnil
,
3203 Foverlay_get (overlay
, Qpriority
),
3206 if (overlay_tails
.used
> 1)
3207 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3209 if (overlay_heads
.used
> 1)
3210 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3212 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3217 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3219 if (total
> overlay_str_len
)
3221 overlay_str_len
= total
;
3222 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3225 p
= overlay_str_buf
;
3226 for (i
= overlay_tails
.used
; --i
>= 0;)
3229 tem
= overlay_tails
.buf
[i
].string
;
3230 nbytes
= copy_text (SDATA (tem
), p
,
3232 STRING_MULTIBYTE (tem
), multibyte
);
3235 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3238 tem
= overlay_heads
.buf
[i
].string
;
3239 nbytes
= copy_text (SDATA (tem
), p
,
3241 STRING_MULTIBYTE (tem
), multibyte
);
3243 tem
= overlay_heads
.buf
[i
].string2
;
3246 nbytes
= copy_text (SDATA (tem
), p
,
3248 STRING_MULTIBYTE (tem
), multibyte
);
3252 if (p
!= overlay_str_buf
+ total
)
3255 *pstr
= overlay_str_buf
;
3261 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3264 recenter_overlay_lists (struct buffer
*buf
, EMACS_INT pos
)
3266 Lisp_Object overlay
, beg
, end
;
3267 struct Lisp_Overlay
*prev
, *tail
, *next
;
3269 /* See if anything in overlays_before should move to overlays_after. */
3271 /* We don't strictly need prev in this loop; it should always be nil.
3272 But we use it for symmetry and in case that should cease to be true
3273 with some future change. */
3275 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3278 XSETMISC (overlay
, tail
);
3280 /* If the overlay is not valid, get rid of it. */
3281 if (!OVERLAY_VALID (overlay
))
3286 /* Splice the cons cell TAIL out of overlays_before. */
3290 buf
->overlays_before
= next
;
3296 beg
= OVERLAY_START (overlay
);
3297 end
= OVERLAY_END (overlay
);
3299 if (OVERLAY_POSITION (end
) > pos
)
3301 /* OVERLAY needs to be moved. */
3302 int where
= OVERLAY_POSITION (beg
);
3303 struct Lisp_Overlay
*other
, *other_prev
;
3305 /* Splice the cons cell TAIL out of overlays_before. */
3309 buf
->overlays_before
= next
;
3311 /* Search thru overlays_after for where to put it. */
3313 for (other
= buf
->overlays_after
; other
;
3314 other_prev
= other
, other
= other
->next
)
3316 Lisp_Object otherbeg
, otheroverlay
;
3318 XSETMISC (otheroverlay
, other
);
3319 eassert (OVERLAY_VALID (otheroverlay
));
3321 otherbeg
= OVERLAY_START (otheroverlay
);
3322 if (OVERLAY_POSITION (otherbeg
) >= where
)
3326 /* Add TAIL to overlays_after before OTHER. */
3329 other_prev
->next
= tail
;
3331 buf
->overlays_after
= tail
;
3335 /* We've reached the things that should stay in overlays_before.
3336 All the rest of overlays_before must end even earlier,
3341 /* See if anything in overlays_after should be in overlays_before. */
3343 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3346 XSETMISC (overlay
, tail
);
3348 /* If the overlay is not valid, get rid of it. */
3349 if (!OVERLAY_VALID (overlay
))
3354 /* Splice the cons cell TAIL out of overlays_after. */
3358 buf
->overlays_after
= next
;
3364 beg
= OVERLAY_START (overlay
);
3365 end
= OVERLAY_END (overlay
);
3367 /* Stop looking, when we know that nothing further
3368 can possibly end before POS. */
3369 if (OVERLAY_POSITION (beg
) > pos
)
3372 if (OVERLAY_POSITION (end
) <= pos
)
3374 /* OVERLAY needs to be moved. */
3375 int where
= OVERLAY_POSITION (end
);
3376 struct Lisp_Overlay
*other
, *other_prev
;
3378 /* Splice the cons cell TAIL out of overlays_after. */
3382 buf
->overlays_after
= next
;
3384 /* Search thru overlays_before for where to put it. */
3386 for (other
= buf
->overlays_before
; other
;
3387 other_prev
= other
, other
= other
->next
)
3389 Lisp_Object otherend
, otheroverlay
;
3391 XSETMISC (otheroverlay
, other
);
3392 eassert (OVERLAY_VALID (otheroverlay
));
3394 otherend
= OVERLAY_END (otheroverlay
);
3395 if (OVERLAY_POSITION (otherend
) <= where
)
3399 /* Add TAIL to overlays_before before OTHER. */
3402 other_prev
->next
= tail
;
3404 buf
->overlays_before
= tail
;
3409 buf
->overlay_center
= pos
;
3413 adjust_overlays_for_insert (EMACS_INT pos
, EMACS_INT length
)
3415 /* After an insertion, the lists are still sorted properly,
3416 but we may need to update the value of the overlay center. */
3417 if (current_buffer
->overlay_center
>= pos
)
3418 current_buffer
->overlay_center
+= length
;
3422 adjust_overlays_for_delete (EMACS_INT pos
, EMACS_INT length
)
3424 if (current_buffer
->overlay_center
< pos
)
3425 /* The deletion was to our right. No change needed; the before- and
3426 after-lists are still consistent. */
3428 else if (current_buffer
->overlay_center
> pos
+ length
)
3429 /* The deletion was to our left. We need to adjust the center value
3430 to account for the change in position, but the lists are consistent
3431 given the new value. */
3432 current_buffer
->overlay_center
-= length
;
3434 /* We're right in the middle. There might be things on the after-list
3435 that now belong on the before-list. Recentering will move them,
3436 and also update the center point. */
3437 recenter_overlay_lists (current_buffer
, pos
);
3440 /* Fix up overlays that were garbled as a result of permuting markers
3441 in the range START through END. Any overlay with at least one
3442 endpoint in this range will need to be unlinked from the overlay
3443 list and reinserted in its proper place.
3444 Such an overlay might even have negative size at this point.
3445 If so, we'll make the overlay empty. */
3447 fix_start_end_in_overlays (register int start
, register int end
)
3449 Lisp_Object overlay
;
3450 struct Lisp_Overlay
*before_list
, *after_list
;
3451 /* These are either nil, indicating that before_list or after_list
3452 should be assigned, or the cons cell the cdr of which should be
3454 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3455 /* 'Parent', likewise, indicates a cons cell or
3456 current_buffer->overlays_before or overlays_after, depending
3457 which loop we're in. */
3458 struct Lisp_Overlay
*tail
, *parent
;
3459 int startpos
, endpos
;
3461 /* This algorithm shifts links around instead of consing and GCing.
3462 The loop invariant is that before_list (resp. after_list) is a
3463 well-formed list except that its last element, the CDR of beforep
3464 (resp. afterp) if beforep (afterp) isn't nil or before_list
3465 (after_list) if it is, is still uninitialized. So it's not a bug
3466 that before_list isn't initialized, although it may look
3468 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3470 XSETMISC (overlay
, tail
);
3472 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3473 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3475 /* If the overlay is backwards, make it empty. */
3476 if (endpos
< startpos
)
3479 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3487 || (startpos
>= start
&& startpos
< end
))
3489 /* Add it to the end of the wrong list. Later on,
3490 recenter_overlay_lists will move it to the right place. */
3491 if (endpos
< current_buffer
->overlay_center
)
3496 afterp
->next
= tail
;
3504 beforep
->next
= tail
;
3508 current_buffer
->overlays_before
= tail
->next
;
3510 parent
->next
= tail
->next
;
3514 parent
= tail
, tail
= parent
->next
;
3516 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3518 XSETMISC (overlay
, tail
);
3520 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3521 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3523 /* If the overlay is backwards, make it empty. */
3524 if (endpos
< startpos
)
3527 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3531 if (startpos
>= end
)
3534 if (startpos
>= start
3535 || (endpos
>= start
&& endpos
< end
))
3537 if (endpos
< current_buffer
->overlay_center
)
3542 afterp
->next
= tail
;
3550 beforep
->next
= tail
;
3554 current_buffer
->overlays_after
= tail
->next
;
3556 parent
->next
= tail
->next
;
3560 parent
= tail
, tail
= parent
->next
;
3563 /* Splice the constructed (wrong) lists into the buffer's lists,
3564 and let the recenter function make it sane again. */
3567 beforep
->next
= current_buffer
->overlays_before
;
3568 current_buffer
->overlays_before
= before_list
;
3570 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3574 afterp
->next
= current_buffer
->overlays_after
;
3575 current_buffer
->overlays_after
= after_list
;
3577 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3580 /* We have two types of overlay: the one whose ending marker is
3581 after-insertion-marker (this is the usual case) and the one whose
3582 ending marker is before-insertion-marker. When `overlays_before'
3583 contains overlays of the latter type and the former type in this
3584 order and both overlays end at inserting position, inserting a text
3585 increases only the ending marker of the latter type, which results
3586 in incorrect ordering of `overlays_before'.
3588 This function fixes ordering of overlays in the slot
3589 `overlays_before' of the buffer *BP. Before the insertion, `point'
3590 was at PREV, and now is at POS. */
3593 fix_overlays_before (struct buffer
*bp
, EMACS_INT prev
, EMACS_INT pos
)
3595 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3596 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3600 /* After the insertion, the several overlays may be in incorrect
3601 order. The possibility is that, in the list `overlays_before',
3602 an overlay which ends at POS appears after an overlay which ends
3603 at PREV. Since POS is greater than PREV, we must fix the
3604 ordering of these overlays, by moving overlays ends at POS before
3605 the overlays ends at PREV. */
3607 /* At first, find a place where disordered overlays should be linked
3608 in. It is where an overlay which end before POS exists. (i.e. an
3609 overlay whose ending marker is after-insertion-marker if disorder
3612 && (XSETMISC (tem
, tail
),
3613 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3619 /* If we don't find such an overlay,
3620 or the found one ends before PREV,
3621 or the found one is the last one in the list,
3622 we don't have to fix anything. */
3623 if (!tail
|| end
< prev
|| !tail
->next
)
3626 right_pair
= parent
;
3630 /* Now, end position of overlays in the list TAIL should be before
3631 or equal to PREV. In the loop, an overlay which ends at POS is
3632 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3633 we found an overlay which ends before PREV, the remaining
3634 overlays are in correct order. */
3637 XSETMISC (tem
, tail
);
3638 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3641 { /* This overlay is disordered. */
3642 struct Lisp_Overlay
*found
= tail
;
3644 /* Unlink the found overlay. */
3646 parent
->next
= tail
;
3647 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3648 and link it into the right place. */
3651 found
->next
= bp
->overlays_before
;
3652 bp
->overlays_before
= found
;
3656 found
->next
= right_pair
->next
;
3657 right_pair
->next
= found
;
3660 else if (end
== prev
)
3665 else /* No more disordered overlay. */
3670 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3671 doc
: /* Return t if OBJECT is an overlay. */)
3672 (Lisp_Object object
)
3674 return (OVERLAYP (object
) ? Qt
: Qnil
);
3677 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3678 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3679 If omitted, BUFFER defaults to the current buffer.
3680 BEG and END may be integers or markers.
3681 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3682 for the front of the overlay advance when text is inserted there
3683 \(which means the text *is not* included in the overlay).
3684 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3685 for the rear of the overlay advance when text is inserted there
3686 \(which means the text *is* included in the overlay). */)
3687 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3689 Lisp_Object overlay
;
3693 XSETBUFFER (buffer
, current_buffer
);
3695 CHECK_BUFFER (buffer
);
3697 && ! EQ (Fmarker_buffer (beg
), buffer
))
3698 error ("Marker points into wrong buffer");
3700 && ! EQ (Fmarker_buffer (end
), buffer
))
3701 error ("Marker points into wrong buffer");
3703 CHECK_NUMBER_COERCE_MARKER (beg
);
3704 CHECK_NUMBER_COERCE_MARKER (end
);
3706 if (XINT (beg
) > XINT (end
))
3709 temp
= beg
; beg
= end
; end
= temp
;
3712 b
= XBUFFER (buffer
);
3714 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3715 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3717 if (!NILP (front_advance
))
3718 XMARKER (beg
)->insertion_type
= 1;
3719 if (!NILP (rear_advance
))
3720 XMARKER (end
)->insertion_type
= 1;
3722 overlay
= allocate_misc ();
3723 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3724 XOVERLAY (overlay
)->start
= beg
;
3725 XOVERLAY (overlay
)->end
= end
;
3726 XOVERLAY (overlay
)->plist
= Qnil
;
3727 XOVERLAY (overlay
)->next
= NULL
;
3729 /* Put the new overlay on the wrong list. */
3730 end
= OVERLAY_END (overlay
);
3731 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3733 if (b
->overlays_after
)
3734 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3735 b
->overlays_after
= XOVERLAY (overlay
);
3739 if (b
->overlays_before
)
3740 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3741 b
->overlays_before
= XOVERLAY (overlay
);
3744 /* This puts it in the right list, and in the right order. */
3745 recenter_overlay_lists (b
, b
->overlay_center
);
3747 /* We don't need to redisplay the region covered by the overlay, because
3748 the overlay has no properties at the moment. */
3753 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3756 modify_overlay (struct buffer
*buf
, EMACS_INT start
, EMACS_INT end
)
3765 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3767 /* If this is a buffer not in the selected window,
3768 we must do other windows. */
3769 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3770 windows_or_buffers_changed
= 1;
3771 /* If multiple windows show this buffer, we must do other windows. */
3772 else if (buffer_shared
> 1)
3773 windows_or_buffers_changed
= 1;
3774 /* If we modify an overlay at the end of the buffer, we cannot
3775 be sure that window end is still valid. */
3776 else if (end
>= ZV
&& start
<= ZV
)
3777 windows_or_buffers_changed
= 1;
3779 ++BUF_OVERLAY_MODIFF (buf
);
3783 Lisp_Object
Fdelete_overlay (Lisp_Object overlay
);
3785 static struct Lisp_Overlay
*
3786 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3788 struct Lisp_Overlay
*tmp
, *prev
;
3789 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3793 prev
->next
= tmp
->next
;
3796 overlay
->next
= NULL
;
3802 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3803 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3804 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3805 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3807 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3809 struct buffer
*b
, *ob
;
3810 Lisp_Object obuffer
;
3811 int count
= SPECPDL_INDEX ();
3813 CHECK_OVERLAY (overlay
);
3815 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3817 XSETBUFFER (buffer
, current_buffer
);
3818 CHECK_BUFFER (buffer
);
3821 && ! EQ (Fmarker_buffer (beg
), buffer
))
3822 error ("Marker points into wrong buffer");
3824 && ! EQ (Fmarker_buffer (end
), buffer
))
3825 error ("Marker points into wrong buffer");
3827 CHECK_NUMBER_COERCE_MARKER (beg
);
3828 CHECK_NUMBER_COERCE_MARKER (end
);
3830 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3831 return Fdelete_overlay (overlay
);
3833 if (XINT (beg
) > XINT (end
))
3836 temp
= beg
; beg
= end
; end
= temp
;
3839 specbind (Qinhibit_quit
, Qt
);
3841 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3842 b
= XBUFFER (buffer
);
3843 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3845 /* If the overlay has changed buffers, do a thorough redisplay. */
3846 if (!EQ (buffer
, obuffer
))
3848 /* Redisplay where the overlay was. */
3849 if (!NILP (obuffer
))
3854 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3855 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3857 modify_overlay (ob
, o_beg
, o_end
);
3860 /* Redisplay where the overlay is going to be. */
3861 modify_overlay (b
, XINT (beg
), XINT (end
));
3864 /* Redisplay the area the overlay has just left, or just enclosed. */
3868 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3869 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3871 if (o_beg
== XINT (beg
))
3872 modify_overlay (b
, o_end
, XINT (end
));
3873 else if (o_end
== XINT (end
))
3874 modify_overlay (b
, o_beg
, XINT (beg
));
3877 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3878 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3879 modify_overlay (b
, o_beg
, o_end
);
3883 if (!NILP (obuffer
))
3886 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3888 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3889 eassert (XOVERLAY (overlay
)->next
== NULL
);
3892 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3893 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3895 /* Put the overlay on the wrong list. */
3896 end
= OVERLAY_END (overlay
);
3897 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3899 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3900 b
->overlays_after
= XOVERLAY (overlay
);
3904 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3905 b
->overlays_before
= XOVERLAY (overlay
);
3908 /* This puts it in the right list, and in the right order. */
3909 recenter_overlay_lists (b
, b
->overlay_center
);
3911 return unbind_to (count
, overlay
);
3914 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3915 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3916 (Lisp_Object overlay
)
3920 int count
= SPECPDL_INDEX ();
3922 CHECK_OVERLAY (overlay
);
3924 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3928 b
= XBUFFER (buffer
);
3929 specbind (Qinhibit_quit
, Qt
);
3931 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3932 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3933 eassert (XOVERLAY (overlay
)->next
== NULL
);
3935 marker_position (OVERLAY_START (overlay
)),
3936 marker_position (OVERLAY_END (overlay
)));
3937 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3938 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3940 /* When deleting an overlay with before or after strings, turn off
3941 display optimizations for the affected buffer, on the basis that
3942 these strings may contain newlines. This is easier to do than to
3943 check for that situation during redisplay. */
3944 if (!windows_or_buffers_changed
3945 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3946 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3947 b
->prevent_redisplay_optimizations_p
= 1;
3949 return unbind_to (count
, Qnil
);
3952 /* Overlay dissection functions. */
3954 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3955 doc
: /* Return the position at which OVERLAY starts. */)
3956 (Lisp_Object overlay
)
3958 CHECK_OVERLAY (overlay
);
3960 return (Fmarker_position (OVERLAY_START (overlay
)));
3963 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3964 doc
: /* Return the position at which OVERLAY ends. */)
3965 (Lisp_Object overlay
)
3967 CHECK_OVERLAY (overlay
);
3969 return (Fmarker_position (OVERLAY_END (overlay
)));
3972 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3973 doc
: /* Return the buffer OVERLAY belongs to.
3974 Return nil if OVERLAY has been deleted. */)
3975 (Lisp_Object overlay
)
3977 CHECK_OVERLAY (overlay
);
3979 return Fmarker_buffer (OVERLAY_START (overlay
));
3982 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3983 doc
: /* Return a list of the properties on OVERLAY.
3984 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3986 (Lisp_Object overlay
)
3988 CHECK_OVERLAY (overlay
);
3990 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3994 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3995 doc
: /* Return a list of the overlays that contain the character at POS. */)
3999 Lisp_Object
*overlay_vec
;
4003 CHECK_NUMBER_COERCE_MARKER (pos
);
4006 /* We can't use alloca here because overlays_at can call xrealloc. */
4007 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4009 /* Put all the overlays we want in a vector in overlay_vec.
4010 Store the length in len. */
4011 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4012 (EMACS_INT
*) 0, (EMACS_INT
*) 0, 0);
4014 /* Make a list of them all. */
4015 result
= Flist (noverlays
, overlay_vec
);
4017 xfree (overlay_vec
);
4021 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
4022 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
4023 Overlap means that at least one character is contained within the overlay
4024 and also contained within the specified region.
4025 Empty overlays are included in the result if they are located at BEG,
4026 between BEG and END, or at END provided END denotes the position at the
4027 end of the buffer. */)
4028 (Lisp_Object beg
, Lisp_Object end
)
4031 Lisp_Object
*overlay_vec
;
4035 CHECK_NUMBER_COERCE_MARKER (beg
);
4036 CHECK_NUMBER_COERCE_MARKER (end
);
4039 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4041 /* Put all the overlays we want in a vector in overlay_vec.
4042 Store the length in len. */
4043 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
4044 (int *) 0, (int *) 0);
4046 /* Make a list of them all. */
4047 result
= Flist (noverlays
, overlay_vec
);
4049 xfree (overlay_vec
);
4053 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
4055 doc
: /* Return the next position after POS where an overlay starts or ends.
4056 If there are no overlay boundaries from POS to (point-max),
4057 the value is (point-max). */)
4062 Lisp_Object
*overlay_vec
;
4066 CHECK_NUMBER_COERCE_MARKER (pos
);
4069 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4071 /* Put all the overlays we want in a vector in overlay_vec.
4072 Store the length in len.
4073 endpos gets the position where the next overlay starts. */
4074 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4075 &endpos
, (EMACS_INT
*) 0, 1);
4077 /* If any of these overlays ends before endpos,
4078 use its ending point instead. */
4079 for (i
= 0; i
< noverlays
; i
++)
4084 oend
= OVERLAY_END (overlay_vec
[i
]);
4085 oendpos
= OVERLAY_POSITION (oend
);
4086 if (oendpos
< endpos
)
4090 xfree (overlay_vec
);
4091 return make_number (endpos
);
4094 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
4095 Sprevious_overlay_change
, 1, 1, 0,
4096 doc
: /* Return the previous position before POS where an overlay starts or ends.
4097 If there are no overlay boundaries from (point-min) to POS,
4098 the value is (point-min). */)
4103 Lisp_Object
*overlay_vec
;
4106 CHECK_NUMBER_COERCE_MARKER (pos
);
4108 /* At beginning of buffer, we know the answer;
4109 avoid bug subtracting 1 below. */
4110 if (XINT (pos
) == BEGV
)
4114 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4116 /* Put all the overlays we want in a vector in overlay_vec.
4117 Store the length in len.
4118 prevpos gets the position of the previous change. */
4119 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4120 (EMACS_INT
*) 0, &prevpos
, 1);
4122 xfree (overlay_vec
);
4123 return make_number (prevpos
);
4126 /* These functions are for debugging overlays. */
4128 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4129 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4130 The car has all the overlays before the overlay center;
4131 the cdr has all the overlays after the overlay center.
4132 Recentering overlays moves overlays between these lists.
4133 The lists you get are copies, so that changing them has no effect.
4134 However, the overlays you get are the real objects that the buffer uses. */)
4137 struct Lisp_Overlay
*ol
;
4138 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4139 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4142 before
= Fcons (tmp
, before
);
4144 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4147 after
= Fcons (tmp
, after
);
4149 return Fcons (Fnreverse (before
), Fnreverse (after
));
4152 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4153 doc
: /* Recenter the overlays of the current buffer around position POS.
4154 That makes overlay lookup faster for positions near POS (but perhaps slower
4155 for positions far away from POS). */)
4158 CHECK_NUMBER_COERCE_MARKER (pos
);
4160 recenter_overlay_lists (current_buffer
, XINT (pos
));
4164 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4165 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4166 (Lisp_Object overlay
, Lisp_Object prop
)
4168 CHECK_OVERLAY (overlay
);
4169 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4172 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4173 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4174 (Lisp_Object overlay
, Lisp_Object prop
, Lisp_Object value
)
4176 Lisp_Object tail
, buffer
;
4179 CHECK_OVERLAY (overlay
);
4181 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4183 for (tail
= XOVERLAY (overlay
)->plist
;
4184 CONSP (tail
) && CONSP (XCDR (tail
));
4185 tail
= XCDR (XCDR (tail
)))
4186 if (EQ (XCAR (tail
), prop
))
4188 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4189 XSETCAR (XCDR (tail
), value
);
4192 /* It wasn't in the list, so add it to the front. */
4193 changed
= !NILP (value
);
4194 XOVERLAY (overlay
)->plist
4195 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4197 if (! NILP (buffer
))
4200 modify_overlay (XBUFFER (buffer
),
4201 marker_position (OVERLAY_START (overlay
)),
4202 marker_position (OVERLAY_END (overlay
)));
4203 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4204 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4205 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4206 Fdelete_overlay (overlay
);
4212 /* Subroutine of report_overlay_modification. */
4214 /* Lisp vector holding overlay hook functions to call.
4215 Vector elements come in pairs.
4216 Each even-index element is a list of hook functions.
4217 The following odd-index element is the overlay they came from.
4219 Before the buffer change, we fill in this vector
4220 as we call overlay hook functions.
4221 After the buffer change, we get the functions to call from this vector.
4222 This way we always call the same functions before and after the change. */
4223 static Lisp_Object last_overlay_modification_hooks
;
4225 /* Number of elements actually used in last_overlay_modification_hooks. */
4226 static int last_overlay_modification_hooks_used
;
4228 /* Add one functionlist/overlay pair
4229 to the end of last_overlay_modification_hooks. */
4232 add_overlay_mod_hooklist (Lisp_Object functionlist
, Lisp_Object overlay
)
4234 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4236 if (last_overlay_modification_hooks_used
== oldsize
)
4237 last_overlay_modification_hooks
= larger_vector
4238 (last_overlay_modification_hooks
, oldsize
* 2, Qnil
);
4239 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4240 functionlist
); last_overlay_modification_hooks_used
++;
4241 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4242 overlay
); last_overlay_modification_hooks_used
++;
4245 /* Run the modification-hooks of overlays that include
4246 any part of the text in START to END.
4247 If this change is an insertion, also
4248 run the insert-before-hooks of overlay starting at END,
4249 and the insert-after-hooks of overlay ending at START.
4251 This is called both before and after the modification.
4252 AFTER is nonzero when we call after the modification.
4254 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4255 When AFTER is nonzero, they are the start position,
4256 the position after the inserted new text,
4257 and the length of deleted or replaced old text. */
4260 report_overlay_modification (Lisp_Object start
, Lisp_Object end
, int after
,
4261 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4263 Lisp_Object prop
, overlay
;
4264 struct Lisp_Overlay
*tail
;
4265 /* 1 if this change is an insertion. */
4266 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4267 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4272 /* We used to run the functions as soon as we found them and only register
4273 them in last_overlay_modification_hooks for the purpose of the `after'
4274 case. But running elisp code as we traverse the list of overlays is
4275 painful because the list can be modified by the elisp code so we had to
4276 copy at several places. We now simply do a read-only traversal that
4277 only collects the functions to run and we run them afterwards. It's
4278 simpler, especially since all the code was already there. -stef */
4282 /* We are being called before a change.
4283 Scan the overlays to find the functions to call. */
4284 last_overlay_modification_hooks_used
= 0;
4285 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4287 int startpos
, endpos
;
4288 Lisp_Object ostart
, oend
;
4290 XSETMISC (overlay
, tail
);
4292 ostart
= OVERLAY_START (overlay
);
4293 oend
= OVERLAY_END (overlay
);
4294 endpos
= OVERLAY_POSITION (oend
);
4295 if (XFASTINT (start
) > endpos
)
4297 startpos
= OVERLAY_POSITION (ostart
);
4298 if (insertion
&& (XFASTINT (start
) == startpos
4299 || XFASTINT (end
) == startpos
))
4301 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4303 add_overlay_mod_hooklist (prop
, overlay
);
4305 if (insertion
&& (XFASTINT (start
) == endpos
4306 || XFASTINT (end
) == endpos
))
4308 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4310 add_overlay_mod_hooklist (prop
, overlay
);
4312 /* Test for intersecting intervals. This does the right thing
4313 for both insertion and deletion. */
4314 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4316 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4318 add_overlay_mod_hooklist (prop
, overlay
);
4322 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4324 int startpos
, endpos
;
4325 Lisp_Object ostart
, oend
;
4327 XSETMISC (overlay
, tail
);
4329 ostart
= OVERLAY_START (overlay
);
4330 oend
= OVERLAY_END (overlay
);
4331 startpos
= OVERLAY_POSITION (ostart
);
4332 endpos
= OVERLAY_POSITION (oend
);
4333 if (XFASTINT (end
) < startpos
)
4335 if (insertion
&& (XFASTINT (start
) == startpos
4336 || XFASTINT (end
) == startpos
))
4338 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4340 add_overlay_mod_hooklist (prop
, overlay
);
4342 if (insertion
&& (XFASTINT (start
) == endpos
4343 || XFASTINT (end
) == endpos
))
4345 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4347 add_overlay_mod_hooklist (prop
, overlay
);
4349 /* Test for intersecting intervals. This does the right thing
4350 for both insertion and deletion. */
4351 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4353 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4355 add_overlay_mod_hooklist (prop
, overlay
);
4360 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4362 /* Call the functions recorded in last_overlay_modification_hooks.
4363 First copy the vector contents, in case some of these hooks
4364 do subsequent modification of the buffer. */
4365 int size
= last_overlay_modification_hooks_used
;
4366 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4369 memcpy (copy
, XVECTOR (last_overlay_modification_hooks
)->contents
,
4370 size
* sizeof (Lisp_Object
));
4372 gcpro1
.nvars
= size
;
4374 for (i
= 0; i
< size
;)
4376 Lisp_Object prop
, overlay
;
4378 overlay
= copy
[i
++];
4379 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4386 call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
, int after
,
4387 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4389 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4391 GCPRO4 (list
, arg1
, arg2
, arg3
);
4393 while (CONSP (list
))
4396 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4398 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4404 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4407 evaporate_overlays (EMACS_INT pos
)
4409 Lisp_Object overlay
, hit_list
;
4410 struct Lisp_Overlay
*tail
;
4413 if (pos
<= current_buffer
->overlay_center
)
4414 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4417 XSETMISC (overlay
, tail
);
4418 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4421 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4422 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4423 hit_list
= Fcons (overlay
, hit_list
);
4426 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4429 XSETMISC (overlay
, tail
);
4430 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4433 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4434 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4435 hit_list
= Fcons (overlay
, hit_list
);
4437 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4438 Fdelete_overlay (XCAR (hit_list
));
4441 /* Somebody has tried to store a value with an unacceptable type
4442 in the slot with offset OFFSET. */
4445 buffer_slot_type_mismatch (Lisp_Object newval
, int type
)
4447 Lisp_Object predicate
;
4451 case_Lisp_Int
: predicate
= Qintegerp
; break;
4452 case Lisp_String
: predicate
= Qstringp
; break;
4453 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4457 wrong_type_argument (predicate
, newval
);
4461 /***********************************************************************
4462 Allocation with mmap
4463 ***********************************************************************/
4465 #ifdef USE_MMAP_FOR_BUFFERS
4467 #include <sys/types.h>
4468 #include <sys/mman.h>
4471 #ifdef MAP_ANONYMOUS
4472 #define MAP_ANON MAP_ANONYMOUS
4479 #define MAP_FAILED ((void *) -1)
4491 /* Memory is allocated in regions which are mapped using mmap(2).
4492 The current implementation lets the system select mapped
4493 addresses; we're not using MAP_FIXED in general, except when
4494 trying to enlarge regions.
4496 Each mapped region starts with a mmap_region structure, the user
4497 area starts after that structure, aligned to MEM_ALIGN.
4499 +-----------------------+
4500 | struct mmap_info + |
4502 +-----------------------+
4506 +-----------------------+ */
4510 /* User-specified size. */
4511 size_t nbytes_specified
;
4513 /* Number of bytes mapped */
4514 size_t nbytes_mapped
;
4516 /* Pointer to the location holding the address of the memory
4517 allocated with the mmap'd block. The variable actually points
4518 after this structure. */
4521 /* Next and previous in list of all mmap'd regions. */
4522 struct mmap_region
*next
, *prev
;
4525 /* Doubly-linked list of mmap'd regions. */
4527 static struct mmap_region
*mmap_regions
;
4529 /* File descriptor for mmap. If we don't have anonymous mapping,
4530 /dev/zero will be opened on it. */
4534 /* Temporary storage for mmap_set_vars, see there. */
4536 static struct mmap_region
*mmap_regions_1
;
4537 static int mmap_fd_1
;
4539 /* Page size on this system. */
4541 static int mmap_page_size
;
4543 /* 1 means mmap has been intialized. */
4545 static int mmap_initialized_p
;
4547 /* Value is X rounded up to the next multiple of N. */
4549 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4551 /* Size of mmap_region structure plus padding. */
4553 #define MMAP_REGION_STRUCT_SIZE \
4554 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4556 /* Given a pointer P to the start of the user-visible part of a mapped
4557 region, return a pointer to the start of the region. */
4559 #define MMAP_REGION(P) \
4560 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4562 /* Given a pointer P to the start of a mapped region, return a pointer
4563 to the start of the user-visible part of the region. */
4565 #define MMAP_USER_AREA(P) \
4566 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4568 #define MEM_ALIGN sizeof (double)
4570 /* Predicate returning true if part of the address range [START .. END]
4571 is currently mapped. Used to prevent overwriting an existing
4574 Default is to conservativly assume the address range is occupied by
4575 something else. This can be overridden by system configuration
4576 files if system-specific means to determine this exists. */
4578 #ifndef MMAP_ALLOCATED_P
4579 #define MMAP_ALLOCATED_P(start, end) 1
4582 /* Function prototypes. */
4584 static int mmap_free_1 (struct mmap_region
*);
4585 static int mmap_enlarge (struct mmap_region
*, int);
4586 static struct mmap_region
*mmap_find (POINTER_TYPE
*, POINTER_TYPE
*);
4587 static POINTER_TYPE
*mmap_alloc (POINTER_TYPE
**, size_t);
4588 static POINTER_TYPE
*mmap_realloc (POINTER_TYPE
**, size_t);
4589 static void mmap_free (POINTER_TYPE
**ptr
);
4590 static void mmap_init (void);
4593 /* Return a region overlapping address range START...END, or null if
4594 none. END is not including, i.e. the last byte in the range
4597 static struct mmap_region
*
4598 mmap_find (start
, end
)
4599 POINTER_TYPE
*start
, *end
;
4601 struct mmap_region
*r
;
4602 char *s
= (char *) start
, *e
= (char *) end
;
4604 for (r
= mmap_regions
; r
; r
= r
->next
)
4606 char *rstart
= (char *) r
;
4607 char *rend
= rstart
+ r
->nbytes_mapped
;
4609 if (/* First byte of range, i.e. START, in this region? */
4610 (s
>= rstart
&& s
< rend
)
4611 /* Last byte of range, i.e. END - 1, in this region? */
4612 || (e
> rstart
&& e
<= rend
)
4613 /* First byte of this region in the range? */
4614 || (rstart
>= s
&& rstart
< e
)
4615 /* Last byte of this region in the range? */
4616 || (rend
> s
&& rend
<= e
))
4624 /* Unmap a region. P is a pointer to the start of the user-araa of
4625 the region. Value is non-zero if successful. */
4629 struct mmap_region
*r
;
4632 r
->next
->prev
= r
->prev
;
4634 r
->prev
->next
= r
->next
;
4636 mmap_regions
= r
->next
;
4638 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4640 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4648 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4649 Value is non-zero if successful. */
4652 mmap_enlarge (r
, npages
)
4653 struct mmap_region
*r
;
4656 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4662 /* Unmap pages at the end of the region. */
4663 nbytes
= - npages
* mmap_page_size
;
4664 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4665 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4668 r
->nbytes_mapped
-= nbytes
;
4672 else if (npages
> 0)
4674 nbytes
= npages
* mmap_page_size
;
4676 /* Try to map additional pages at the end of the region. We
4677 cannot do this if the address range is already occupied by
4678 something else because mmap deletes any previous mapping.
4679 I'm not sure this is worth doing, let's see. */
4680 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4684 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4685 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4686 if (p
== MAP_FAILED
)
4687 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4688 else if (p
!= (POINTER_TYPE
*) region_end
)
4690 /* Kernels are free to choose a different address. In
4691 that case, unmap what we've mapped above; we have
4693 if (munmap (p
, nbytes
) == -1)
4694 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4698 r
->nbytes_mapped
+= nbytes
;
4708 /* Set or reset variables holding references to mapped regions. If
4709 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4710 non-zero, set all variables to the start of the user-areas
4713 This function is called from Fdump_emacs to ensure that the dumped
4714 Emacs doesn't contain references to memory that won't be mapped
4715 when Emacs starts. */
4718 mmap_set_vars (restore_p
)
4721 struct mmap_region
*r
;
4725 mmap_regions
= mmap_regions_1
;
4726 mmap_fd
= mmap_fd_1
;
4727 for (r
= mmap_regions
; r
; r
= r
->next
)
4728 *r
->var
= MMAP_USER_AREA (r
);
4732 for (r
= mmap_regions
; r
; r
= r
->next
)
4734 mmap_regions_1
= mmap_regions
;
4735 mmap_regions
= NULL
;
4736 mmap_fd_1
= mmap_fd
;
4742 /* Allocate a block of storage large enough to hold NBYTES bytes of
4743 data. A pointer to the data is returned in *VAR. VAR is thus the
4744 address of some variable which will use the data area.
4746 The allocation of 0 bytes is valid.
4748 If we can't allocate the necessary memory, set *VAR to null, and
4751 static POINTER_TYPE
*
4752 mmap_alloc (var
, nbytes
)
4761 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4762 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4765 if (p
== MAP_FAILED
)
4767 if (errno
!= ENOMEM
)
4768 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4773 struct mmap_region
*r
= (struct mmap_region
*) p
;
4775 r
->nbytes_specified
= nbytes
;
4776 r
->nbytes_mapped
= map
;
4779 r
->next
= mmap_regions
;
4784 p
= MMAP_USER_AREA (p
);
4791 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4792 resize it to size NBYTES. Change *VAR to reflect the new block,
4793 and return this value. If more memory cannot be allocated, then
4794 leave *VAR unchanged, and return null. */
4796 static POINTER_TYPE
*
4797 mmap_realloc (var
, nbytes
)
4801 POINTER_TYPE
*result
;
4806 result
= mmap_alloc (var
, nbytes
);
4807 else if (nbytes
== 0)
4810 result
= mmap_alloc (var
, nbytes
);
4814 struct mmap_region
*r
= MMAP_REGION (*var
);
4815 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4820 POINTER_TYPE
*old_ptr
= *var
;
4822 /* Try to map additional pages at the end of the region.
4823 If that fails, allocate a new region, copy data
4824 from the old region, then free it. */
4825 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4828 r
->nbytes_specified
= nbytes
;
4829 *var
= result
= old_ptr
;
4831 else if (mmap_alloc (var
, nbytes
))
4833 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4834 mmap_free_1 (MMAP_REGION (old_ptr
));
4836 r
= MMAP_REGION (result
);
4837 r
->nbytes_specified
= nbytes
;
4845 else if (room
- nbytes
>= mmap_page_size
)
4847 /* Shrinking by at least a page. Let's give some
4848 memory back to the system.
4850 The extra parens are to make the division happens first,
4851 on positive values, so we know it will round towards
4853 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4855 r
->nbytes_specified
= nbytes
;
4859 /* Leave it alone. */
4861 r
->nbytes_specified
= nbytes
;
4869 /* Free a block of relocatable storage whose data is pointed to by
4870 PTR. Store 0 in *PTR to show there's no block allocated. */
4880 mmap_free_1 (MMAP_REGION (*var
));
4886 /* Perform necessary intializations for the use of mmap. */
4892 /* The value of mmap_fd is initially 0 in temacs, and -1
4893 in a dumped Emacs. */
4896 /* No anonymous mmap -- we need the file descriptor. */
4897 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4899 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4901 #endif /* MAP_ANON == 0 */
4903 if (mmap_initialized_p
)
4905 mmap_initialized_p
= 1;
4911 mmap_page_size
= getpagesize ();
4914 #endif /* USE_MMAP_FOR_BUFFERS */
4918 /***********************************************************************
4919 Buffer-text Allocation
4920 ***********************************************************************/
4923 extern POINTER_TYPE
*r_alloc (POINTER_TYPE
**, size_t);
4924 extern POINTER_TYPE
*r_re_alloc (POINTER_TYPE
**, size_t);
4925 extern void r_alloc_free (POINTER_TYPE
**ptr
);
4926 #endif /* REL_ALLOC */
4929 /* Allocate NBYTES bytes for buffer B's text buffer. */
4932 alloc_buffer_text (struct buffer
*b
, size_t nbytes
)
4937 #if defined USE_MMAP_FOR_BUFFERS
4938 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4939 #elif defined REL_ALLOC
4940 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4942 p
= xmalloc (nbytes
);
4951 b
->text
->beg
= (unsigned char *) p
;
4955 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4959 enlarge_buffer_text (struct buffer
*b
, EMACS_INT delta
)
4962 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4965 #if defined USE_MMAP_FOR_BUFFERS
4966 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4967 #elif defined REL_ALLOC
4968 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4970 p
= xrealloc (b
->text
->beg
, nbytes
);
4979 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4984 /* Free buffer B's text buffer. */
4987 free_buffer_text (struct buffer
*b
)
4991 #if defined USE_MMAP_FOR_BUFFERS
4992 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4993 #elif defined REL_ALLOC
4994 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4996 xfree (b
->text
->beg
);
4999 BUF_BEG_ADDR (b
) = NULL
;
5005 /***********************************************************************
5007 ***********************************************************************/
5010 init_buffer_once (void)
5014 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
5016 /* Make sure all markable slots in buffer_defaults
5017 are initialized reasonably, so mark_buffer won't choke. */
5018 reset_buffer (&buffer_defaults
);
5019 eassert (EQ (buffer_defaults
.name
, make_number (0)));
5020 reset_buffer_local_variables (&buffer_defaults
, 1);
5021 eassert (EQ (buffer_local_symbols
.name
, make_number (0)));
5022 reset_buffer (&buffer_local_symbols
);
5023 reset_buffer_local_variables (&buffer_local_symbols
, 1);
5024 /* Prevent GC from getting confused. */
5025 buffer_defaults
.text
= &buffer_defaults
.own_text
;
5026 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
5027 BUF_INTERVALS (&buffer_defaults
) = 0;
5028 BUF_INTERVALS (&buffer_local_symbols
) = 0;
5029 XSETPVECTYPE (&buffer_defaults
, PVEC_BUFFER
);
5030 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
5031 XSETPVECTYPE (&buffer_local_symbols
, PVEC_BUFFER
);
5032 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
5034 /* Set up the default values of various buffer slots. */
5035 /* Must do these before making the first buffer! */
5037 /* real setup is done in bindings.el */
5038 buffer_defaults
.mode_line_format
= make_pure_c_string ("%-");
5039 buffer_defaults
.header_line_format
= Qnil
;
5040 buffer_defaults
.abbrev_mode
= Qnil
;
5041 buffer_defaults
.overwrite_mode
= Qnil
;
5042 buffer_defaults
.case_fold_search
= Qt
;
5043 buffer_defaults
.auto_fill_function
= Qnil
;
5044 buffer_defaults
.selective_display
= Qnil
;
5046 buffer_defaults
.selective_display_ellipses
= Qt
;
5048 buffer_defaults
.abbrev_table
= Qnil
;
5049 buffer_defaults
.display_table
= Qnil
;
5050 buffer_defaults
.undo_list
= Qnil
;
5051 buffer_defaults
.mark_active
= Qnil
;
5052 buffer_defaults
.file_format
= Qnil
;
5053 buffer_defaults
.auto_save_file_format
= Qt
;
5054 buffer_defaults
.overlays_before
= NULL
;
5055 buffer_defaults
.overlays_after
= NULL
;
5056 buffer_defaults
.overlay_center
= BEG
;
5058 XSETFASTINT (buffer_defaults
.tab_width
, 8);
5059 buffer_defaults
.truncate_lines
= Qnil
;
5060 buffer_defaults
.word_wrap
= Qnil
;
5061 buffer_defaults
.ctl_arrow
= Qt
;
5062 buffer_defaults
.bidi_display_reordering
= Qnil
;
5063 buffer_defaults
.bidi_paragraph_direction
= Qnil
;
5064 buffer_defaults
.cursor_type
= Qt
;
5065 buffer_defaults
.extra_line_spacing
= Qnil
;
5066 buffer_defaults
.cursor_in_non_selected_windows
= Qt
;
5069 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
5071 buffer_defaults
.enable_multibyte_characters
= Qt
;
5072 buffer_defaults
.buffer_file_coding_system
= Qnil
;
5073 XSETFASTINT (buffer_defaults
.fill_column
, 70);
5074 XSETFASTINT (buffer_defaults
.left_margin
, 0);
5075 buffer_defaults
.cache_long_line_scans
= Qnil
;
5076 buffer_defaults
.file_truename
= Qnil
;
5077 XSETFASTINT (buffer_defaults
.display_count
, 0);
5078 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
5079 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
5080 buffer_defaults
.left_fringe_width
= Qnil
;
5081 buffer_defaults
.right_fringe_width
= Qnil
;
5082 buffer_defaults
.fringes_outside_margins
= Qnil
;
5083 buffer_defaults
.scroll_bar_width
= Qnil
;
5084 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
5085 buffer_defaults
.indicate_empty_lines
= Qnil
;
5086 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
5087 buffer_defaults
.fringe_indicator_alist
= Qnil
;
5088 buffer_defaults
.fringe_cursor_alist
= Qnil
;
5089 buffer_defaults
.scroll_up_aggressively
= Qnil
;
5090 buffer_defaults
.scroll_down_aggressively
= Qnil
;
5091 buffer_defaults
.display_time
= Qnil
;
5093 /* Assign the local-flags to the slots that have default values.
5094 The local flag is a bit that is used in the buffer
5095 to say that it has its own local value for the slot.
5096 The local flag bits are in the local_var_flags slot of the buffer. */
5098 /* Nothing can work if this isn't true */
5099 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
5101 /* 0 means not a lisp var, -1 means always local, else mask */
5102 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
5103 XSETINT (buffer_local_flags
.filename
, -1);
5104 XSETINT (buffer_local_flags
.directory
, -1);
5105 XSETINT (buffer_local_flags
.backed_up
, -1);
5106 XSETINT (buffer_local_flags
.save_length
, -1);
5107 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
5108 XSETINT (buffer_local_flags
.read_only
, -1);
5109 XSETINT (buffer_local_flags
.major_mode
, -1);
5110 XSETINT (buffer_local_flags
.mode_name
, -1);
5111 XSETINT (buffer_local_flags
.undo_list
, -1);
5112 XSETINT (buffer_local_flags
.mark_active
, -1);
5113 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
5114 XSETINT (buffer_local_flags
.file_truename
, -1);
5115 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
5116 XSETINT (buffer_local_flags
.file_format
, -1);
5117 XSETINT (buffer_local_flags
.auto_save_file_format
, -1);
5118 XSETINT (buffer_local_flags
.display_count
, -1);
5119 XSETINT (buffer_local_flags
.display_time
, -1);
5120 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
5123 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
5124 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
5125 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5126 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5127 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5128 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5130 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5132 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5133 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5134 XSETFASTINT (buffer_local_flags
.word_wrap
, idx
); ++idx
;
5135 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5136 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5137 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5138 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5139 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5141 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5142 /* Make this one a permanent local. */
5143 buffer_permanent_local_flags
[idx
++] = 1;
5145 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5146 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5147 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5148 XSETFASTINT (buffer_local_flags
.bidi_display_reordering
, idx
); ++idx
;
5149 XSETFASTINT (buffer_local_flags
.bidi_paragraph_direction
, idx
); ++idx
;
5150 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5151 /* Make this one a permanent local. */
5152 buffer_permanent_local_flags
[idx
++] = 1;
5153 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5154 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5155 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5156 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5157 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5158 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5159 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5160 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5161 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5162 XSETFASTINT (buffer_local_flags
.fringe_indicator_alist
, idx
); ++idx
;
5163 XSETFASTINT (buffer_local_flags
.fringe_cursor_alist
, idx
); ++idx
;
5164 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5165 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5166 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5167 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5168 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5169 XSETFASTINT (buffer_local_flags
.cursor_in_non_selected_windows
, idx
); ++idx
;
5171 /* Need more room? */
5172 if (idx
>= MAX_PER_BUFFER_VARS
)
5174 last_per_buffer_idx
= idx
;
5176 Vbuffer_alist
= Qnil
;
5180 QSFundamental
= make_pure_c_string ("Fundamental");
5182 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5183 buffer_defaults
.major_mode
= Qfundamental_mode
;
5185 Qmode_class
= intern_c_string ("mode-class");
5187 Qprotected_field
= intern_c_string ("protected-field");
5189 Qpermanent_local
= intern_c_string ("permanent-local");
5191 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5192 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5194 Qucs_set_table_for_input
= intern_c_string ("ucs-set-table-for-input");
5196 /* super-magic invisible buffer */
5197 Vprin1_to_string_buffer
= Fget_buffer_create (make_pure_c_string (" prin1"));
5198 Vbuffer_alist
= Qnil
;
5200 Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*")));
5202 inhibit_modification_hooks
= 0;
5212 #ifdef USE_MMAP_FOR_BUFFERS
5214 /* When using the ralloc implementation based on mmap(2), buffer
5215 text pointers will have been set to null in the dumped Emacs.
5219 for (b
= all_buffers
; b
; b
= b
->next
)
5220 if (b
->text
->beg
== NULL
)
5221 enlarge_buffer_text (b
, 0);
5223 #endif /* USE_MMAP_FOR_BUFFERS */
5225 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5226 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5227 Fset_buffer_multibyte (Qnil
);
5229 pwd
= get_current_dir_name ();
5232 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5234 /* Maybe this should really use some standard subroutine
5235 whose definition is filename syntax dependent. */
5237 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5239 /* Grow buffer to add directory separator and '\0'. */
5240 pwd
= (char *) realloc (pwd
, len
+ 2);
5242 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5243 pwd
[len
] = DIRECTORY_SEP
;
5244 pwd
[len
+ 1] = '\0';
5247 current_buffer
->directory
= make_unibyte_string (pwd
, strlen (pwd
));
5248 if (! NILP (buffer_defaults
.enable_multibyte_characters
))
5249 /* At this moment, we still don't know how to decode the
5250 directory name. So, we keep the bytes in multibyte form so
5251 that ENCODE_FILE correctly gets the original bytes. */
5252 current_buffer
->directory
5253 = string_to_multibyte (current_buffer
->directory
);
5255 /* Add /: to the front of the name
5256 if it would otherwise be treated as magic. */
5257 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5259 /* If the default dir is just /, TEMP is non-nil
5260 because of the ange-ftp completion handler.
5261 However, it is not necessary to turn / into /:/.
5262 So avoid doing that. */
5263 && strcmp ("/", SDATA (current_buffer
->directory
)))
5264 current_buffer
->directory
5265 = concat2 (build_string ("/:"), current_buffer
->directory
);
5267 temp
= get_minibuffer (0);
5268 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5273 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5274 Object stored in the current buffer. address is the address of the slot
5275 in the buffer that is current now. */
5277 /* TYPE is nil for a general Lisp variable.
5278 An integer specifies a type; then only Lisp values
5279 with that type code are allowed (except that nil is allowed too).
5280 LNAME is the Lisp-level variable name.
5281 VNAME is the name of the buffer slot.
5282 DOC is a dummy where you write the doc string as a comment. */
5283 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5285 static struct Lisp_Buffer_Objfwd bo_fwd; \
5286 defvar_per_buffer (&bo_fwd, lname, vname, type, 0); \
5290 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, char *namestring
,
5291 Lisp_Object
*address
, Lisp_Object type
, char *doc
)
5293 struct Lisp_Symbol
*sym
;
5296 sym
= XSYMBOL (intern (namestring
));
5297 offset
= (char *)address
- (char *)current_buffer
;
5299 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5300 bo_fwd
->offset
= offset
;
5301 bo_fwd
->slottype
= type
;
5302 sym
->redirect
= SYMBOL_FORWARDED
;
5304 /* I tried to do the job without a cast, but it seems impossible.
5305 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5306 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5308 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5310 if (PER_BUFFER_IDX (offset
) == 0)
5311 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5312 slot of buffer_local_flags */
5317 /* initialize the buffer routines */
5319 syms_of_buffer (void)
5321 staticpro (&last_overlay_modification_hooks
);
5322 last_overlay_modification_hooks
5323 = Fmake_vector (make_number (10), Qnil
);
5325 staticpro (&Vbuffer_defaults
);
5326 staticpro (&Vbuffer_local_symbols
);
5327 staticpro (&Qfundamental_mode
);
5328 staticpro (&Qmode_class
);
5329 staticpro (&QSFundamental
);
5330 staticpro (&Vbuffer_alist
);
5331 staticpro (&Qprotected_field
);
5332 staticpro (&Qpermanent_local
);
5333 Qpermanent_local_hook
= intern_c_string ("permanent-local-hook");
5334 staticpro (&Qpermanent_local_hook
);
5335 staticpro (&Qkill_buffer_hook
);
5336 Qoverlayp
= intern_c_string ("overlayp");
5337 staticpro (&Qoverlayp
);
5338 Qevaporate
= intern_c_string ("evaporate");
5339 staticpro (&Qevaporate
);
5340 Qmodification_hooks
= intern_c_string ("modification-hooks");
5341 staticpro (&Qmodification_hooks
);
5342 Qinsert_in_front_hooks
= intern_c_string ("insert-in-front-hooks");
5343 staticpro (&Qinsert_in_front_hooks
);
5344 Qinsert_behind_hooks
= intern_c_string ("insert-behind-hooks");
5345 staticpro (&Qinsert_behind_hooks
);
5346 Qget_file_buffer
= intern_c_string ("get-file-buffer");
5347 staticpro (&Qget_file_buffer
);
5348 Qpriority
= intern_c_string ("priority");
5349 staticpro (&Qpriority
);
5350 Qwindow
= intern_c_string ("window");
5351 staticpro (&Qwindow
);
5352 Qbefore_string
= intern_c_string ("before-string");
5353 staticpro (&Qbefore_string
);
5354 Qafter_string
= intern_c_string ("after-string");
5355 staticpro (&Qafter_string
);
5356 Qfirst_change_hook
= intern_c_string ("first-change-hook");
5357 staticpro (&Qfirst_change_hook
);
5358 Qbefore_change_functions
= intern_c_string ("before-change-functions");
5359 staticpro (&Qbefore_change_functions
);
5360 Qafter_change_functions
= intern_c_string ("after-change-functions");
5361 staticpro (&Qafter_change_functions
);
5362 /* The next one is initialized in init_buffer_once. */
5363 staticpro (&Qucs_set_table_for_input
);
5365 Qkill_buffer_query_functions
= intern_c_string ("kill-buffer-query-functions");
5366 staticpro (&Qkill_buffer_query_functions
);
5368 Fput (Qprotected_field
, Qerror_conditions
,
5369 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5370 Fput (Qprotected_field
, Qerror_message
,
5371 make_pure_c_string ("Attempt to modify a protected field"));
5373 /* All these use DEFVAR_LISP_NOPRO because the slots in
5374 buffer_defaults will all be marked via Vbuffer_defaults. */
5376 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5377 &buffer_defaults
.mode_line_format
,
5378 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5379 This is the same as (default-value 'mode-line-format). */);
5381 DEFVAR_LISP_NOPRO ("default-header-line-format",
5382 &buffer_defaults
.header_line_format
,
5383 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5384 This is the same as (default-value 'header-line-format). */);
5386 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5387 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5388 This is the same as (default-value 'cursor-type). */);
5390 DEFVAR_LISP_NOPRO ("default-line-spacing",
5391 &buffer_defaults
.extra_line_spacing
,
5392 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5393 This is the same as (default-value 'line-spacing). */);
5395 DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows",
5396 &buffer_defaults
.cursor_in_non_selected_windows
,
5397 doc
: /* Default value of `cursor-in-non-selected-windows'.
5398 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5400 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5401 &buffer_defaults
.abbrev_mode
,
5402 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5403 This is the same as (default-value 'abbrev-mode). */);
5405 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5406 &buffer_defaults
.ctl_arrow
,
5407 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5408 This is the same as (default-value 'ctl-arrow). */);
5410 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5411 &buffer_defaults
.enable_multibyte_characters
,
5412 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5413 This is the same as (default-value 'enable-multibyte-characters). */);
5415 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5416 &buffer_defaults
.buffer_file_coding_system
,
5417 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5418 This is the same as (default-value 'buffer-file-coding-system). */);
5420 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5421 &buffer_defaults
.truncate_lines
,
5422 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5423 This is the same as (default-value 'truncate-lines). */);
5425 DEFVAR_LISP_NOPRO ("default-fill-column",
5426 &buffer_defaults
.fill_column
,
5427 doc
: /* Default value of `fill-column' for buffers that do not override it.
5428 This is the same as (default-value 'fill-column). */);
5430 DEFVAR_LISP_NOPRO ("default-left-margin",
5431 &buffer_defaults
.left_margin
,
5432 doc
: /* Default value of `left-margin' for buffers that do not override it.
5433 This is the same as (default-value 'left-margin). */);
5435 DEFVAR_LISP_NOPRO ("default-tab-width",
5436 &buffer_defaults
.tab_width
,
5437 doc
: /* Default value of `tab-width' for buffers that do not override it.
5438 This is the same as (default-value 'tab-width). */);
5440 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5441 &buffer_defaults
.case_fold_search
,
5442 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5443 This is the same as (default-value 'case-fold-search). */);
5446 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5447 &buffer_defaults
.buffer_file_type
,
5448 doc
: /* Default file type for buffers that do not override it.
5449 This is the same as (default-value 'buffer-file-type).
5450 The file type is nil for text, t for binary. */);
5453 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5454 &buffer_defaults
.left_margin_cols
,
5455 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5456 This is the same as (default-value 'left-margin-width). */);
5458 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5459 &buffer_defaults
.right_margin_cols
,
5460 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5461 This is the same as (default-value 'right-margin-width). */);
5463 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5464 &buffer_defaults
.left_fringe_width
,
5465 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5466 This is the same as (default-value 'left-fringe-width). */);
5468 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5469 &buffer_defaults
.right_fringe_width
,
5470 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5471 This is the same as (default-value 'right-fringe-width). */);
5473 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5474 &buffer_defaults
.fringes_outside_margins
,
5475 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5476 This is the same as (default-value 'fringes-outside-margins). */);
5478 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5479 &buffer_defaults
.scroll_bar_width
,
5480 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5481 This is the same as (default-value 'scroll-bar-width). */);
5483 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5484 &buffer_defaults
.vertical_scroll_bar_type
,
5485 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5486 This is the same as (default-value 'vertical-scroll-bar). */);
5488 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5489 &buffer_defaults
.indicate_empty_lines
,
5490 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5491 This is the same as (default-value 'indicate-empty-lines). */);
5493 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5494 &buffer_defaults
.indicate_buffer_boundaries
,
5495 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5496 This is the same as (default-value 'indicate-buffer-boundaries). */);
5498 DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist",
5499 &buffer_defaults
.fringe_indicator_alist
,
5500 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5501 This is the same as (default-value 'fringe-indicator-alist'). */);
5503 DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist",
5504 &buffer_defaults
.fringe_cursor_alist
,
5505 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5506 This is the same as (default-value 'fringe-cursor-alist'). */);
5508 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5509 &buffer_defaults
.scroll_up_aggressively
,
5510 doc
: /* Default value of `scroll-up-aggressively'.
5511 This value applies in buffers that don't have their own local values.
5512 This is the same as (default-value 'scroll-up-aggressively). */);
5514 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5515 &buffer_defaults
.scroll_down_aggressively
,
5516 doc
: /* Default value of `scroll-down-aggressively'.
5517 This value applies in buffers that don't have their own local values.
5518 This is the same as (default-value 'scroll-down-aggressively). */);
5520 DEFVAR_PER_BUFFER ("header-line-format",
5521 ¤t_buffer
->header_line_format
,
5523 doc
: /* Analogous to `mode-line-format', but controls the header line.
5524 The header line appears, optionally, at the top of a window;
5525 the mode line appears at the bottom. */);
5527 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5529 doc
: /* Template for displaying mode line for current buffer.
5530 Each buffer has its own value of this variable.
5531 Value may be nil, a string, a symbol or a list or cons cell.
5532 A value of nil means don't display a mode line.
5533 For a symbol, its value is used (but it is ignored if t or nil).
5534 A string appearing directly as the value of a symbol is processed verbatim
5535 in that the %-constructs below are not recognized.
5536 Note that unless the symbol is marked as a `risky-local-variable', all
5537 properties in any strings, as well as all :eval and :propertize forms
5538 in the value of that symbol will be ignored.
5539 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5540 is used as a mode line element. Be careful--FORM should not load any files,
5541 because that can cause an infinite recursion.
5542 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5543 with the specified properties PROPS applied.
5544 For a list whose car is a symbol, the symbol's value is taken,
5545 and if that is non-nil, the cadr of the list is processed recursively.
5546 Otherwise, the caddr of the list (if there is one) is processed.
5547 For a list whose car is a string or list, each element is processed
5548 recursively and the results are effectively concatenated.
5549 For a list whose car is an integer, the cdr of the list is processed
5550 and padded (if the number is positive) or truncated (if negative)
5551 to the width specified by that number.
5552 A string is printed verbatim in the mode line except for %-constructs:
5553 (%-constructs are allowed when the string is the entire mode-line-format
5554 or when it is found in a cons-cell or a list)
5555 %b -- print buffer name. %f -- print visited file name.
5556 %F -- print frame name.
5557 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5558 %& is like %*, but ignore read-only-ness.
5559 % means buffer is read-only and * means it is modified.
5560 For a modified read-only buffer, %* gives % and %+ gives *.
5561 %s -- print process status. %l -- print the current line number.
5562 %c -- print the current column number (this makes editing slower).
5563 To make the column number update correctly in all cases,
5564 `column-number-mode' must be non-nil.
5565 %i -- print the size of the buffer.
5566 %I -- like %i, but use k, M, G, etc., to abbreviate.
5567 %p -- print percent of buffer above top of window, or Top, Bot or All.
5568 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5569 or print Bottom or All.
5570 %n -- print Narrow if appropriate.
5571 %t -- visited file is text or binary (if OS supports this distinction).
5572 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5573 %Z -- like %z, but including the end-of-line format.
5574 %e -- print error message about full memory.
5575 %@ -- print @ or hyphen. @ means that default-directory is on a
5577 %[ -- print one [ for each recursive editing level. %] similar.
5578 %% -- print %. %- -- print infinitely many dashes.
5579 Decimal digits after the % specify field width to which to pad. */);
5581 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5582 doc
: /* *Value of `major-mode' for new buffers. */);
5584 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5585 make_number (Lisp_Symbol
),
5586 doc
: /* Symbol for current buffer's major mode.
5587 The default value (normally `fundamental-mode') affects new buffers.
5588 A value of nil means to use the current buffer's major mode, provided
5589 it is not marked as "special".
5591 When a mode is used by default, `find-file' switches to it before it
5592 reads the contents into the buffer and before it finishes setting up
5593 the buffer. Thus, the mode and its hooks should not expect certain
5594 variables such as `buffer-read-only' and `buffer-file-coding-system'
5597 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5599 doc
: /* Pretty name of current buffer's major mode.
5600 Usually a string, but can use any of the constructs for `mode-line-format',
5602 Format with `format-mode-line' to produce a string value. */);
5604 DEFVAR_PER_BUFFER ("local-abbrev-table", ¤t_buffer
->abbrev_table
, Qnil
,
5605 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5607 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5608 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5610 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5612 doc
: /* *Non-nil if searches and matches should ignore case. */);
5614 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5615 make_number (LISP_INT_TAG
),
5616 doc
: /* *Column beyond which automatic line-wrapping should happen.
5617 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5619 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5620 make_number (LISP_INT_TAG
),
5621 doc
: /* *Column for the default `indent-line-function' to indent to.
5622 Linefeed indents to this column in Fundamental mode. */);
5624 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5625 make_number (LISP_INT_TAG
),
5626 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5628 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5629 doc
: /* *Non-nil means display control chars with uparrow.
5630 A value of nil means use backslash and octal digits.
5631 This variable does not apply to characters whose display is specified
5632 in the current display table (if there is one). */);
5634 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5635 ¤t_buffer
->enable_multibyte_characters
,
5637 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5638 Otherwise they are regarded as unibyte. This affects the display,
5639 file I/O and the behavior of various editing commands.
5641 This variable is buffer-local but you cannot set it directly;
5642 use the function `set-buffer-multibyte' to change a buffer's representation.
5643 Changing its default value with `setq-default' is supported.
5644 See also variable `default-enable-multibyte-characters' and Info node
5645 `(elisp)Text Representations'. */);
5646 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5648 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5649 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5650 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5651 This variable applies to saving the buffer, and also to `write-region'
5652 and other functions that use `write-region'.
5653 It does not apply to sending output to subprocesses, however.
5655 If this is nil, the buffer is saved without any code conversion
5656 unless some coding system is specified in `file-coding-system-alist'
5657 for the buffer file.
5659 If the text to be saved cannot be encoded as specified by this variable,
5660 an alternative encoding is selected by `select-safe-coding-system', which see.
5662 The variable `coding-system-for-write', if non-nil, overrides this variable.
5664 This variable is never applied to a way of decoding a file while reading it. */);
5666 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5667 ¤t_buffer
->bidi_display_reordering
, Qnil
,
5668 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5670 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5671 ¤t_buffer
->bidi_paragraph_direction
, Qnil
,
5672 doc
: /* *If non-nil, forces directionality of text paragraphs in the buffer.
5674 If this is nil (the default), the direction of each paragraph is
5675 determined by the first strong directional character of its text.
5676 The values of `right-to-left' and `left-to-right' override that.
5677 Any other value is treated as nil.
5679 This variable has no effect unless the buffer's value of
5680 \`bidi-display-reordering' is non-nil. */);
5682 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5683 doc
: /* *Non-nil means do not display continuation lines.
5684 Instead, give each line of text just one screen line.
5686 Note that this is overridden by the variable
5687 `truncate-partial-width-windows' if that variable is non-nil
5688 and this buffer is not full-frame width. */);
5690 DEFVAR_PER_BUFFER ("word-wrap", ¤t_buffer
->word_wrap
, Qnil
,
5691 doc
: /* *Non-nil means to use word-wrapping for continuation lines.
5692 When word-wrapping is on, continuation lines are wrapped at the space
5693 or tab character nearest to the right window edge.
5694 If nil, continuation lines are wrapped at the right screen edge.
5696 This variable has no effect if long lines are truncated (see
5697 `truncate-lines' and `truncate-partial-width-windows'). If you use
5698 word-wrapping, you might want to reduce the value of
5699 `truncate-partial-width-windows', since wrapping can make text readable
5700 in narrower windows. */);
5703 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5705 doc
: /* Non-nil if the visited file is a binary file.
5706 This variable is meaningful on MS-DOG and Windows NT.
5707 On those systems, it is automatically local in every buffer.
5708 On other systems, this variable is normally always nil. */);
5711 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5712 make_number (Lisp_String
),
5713 doc
: /* Name of default directory of current buffer. Should end with slash.
5714 To interactively change the default directory, use command `cd'. */);
5716 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5718 doc
: /* Function called (if non-nil) to perform auto-fill.
5719 It is called after self-inserting any character specified in
5720 the `auto-fill-chars' table.
5721 NOTE: This variable is not a hook;
5722 its value may not be a list of functions. */);
5724 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5725 make_number (Lisp_String
),
5726 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5728 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5729 make_number (Lisp_String
),
5730 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5731 The truename of a file is calculated by `file-truename'
5732 and then abbreviated with `abbreviate-file-name'. */);
5734 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5735 ¤t_buffer
->auto_save_file_name
,
5736 make_number (Lisp_String
),
5737 doc
: /* Name of file for auto-saving current buffer.
5738 If it is nil, that means don't auto-save this buffer. */);
5740 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5741 doc
: /* Non-nil if this buffer is read-only. */);
5743 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5744 doc
: /* Non-nil if this buffer's file has been backed up.
5745 Backing up is done before the first time the file is saved. */);
5747 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5748 make_number (LISP_INT_TAG
),
5749 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5751 -1 means auto-saving turned off until next real save.
5753 If you set this to -2, that means don't turn off auto-saving in this buffer
5754 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5755 you probably should set this to -2 in that buffer. */);
5757 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5759 doc
: /* Non-nil enables selective display.
5760 An integer N as value means display only lines
5761 that start with less than N columns of space.
5762 A value of t means that the character ^M makes itself and
5763 all the rest of the line invisible; also, when saving the buffer
5764 in a file, save the ^M as a newline. */);
5767 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5768 ¤t_buffer
->selective_display_ellipses
,
5770 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5773 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5774 doc
: /* Non-nil if self-insertion should replace existing text.
5775 The value should be one of `overwrite-mode-textual',
5776 `overwrite-mode-binary', or nil.
5777 If it is `overwrite-mode-textual', self-insertion still
5778 inserts at the end of a line, and inserts when point is before a tab,
5779 until the tab is filled in.
5780 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5782 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5784 doc
: /* Display table that controls display of the contents of current buffer.
5786 If this variable is nil, the value of `standard-display-table' is used.
5787 Each window can have its own, overriding display table, see
5788 `set-window-display-table' and `window-display-table'.
5790 The display table is a char-table created with `make-display-table'.
5791 A char-table is an array indexed by character codes. Normal array
5792 primitives `aref' and `aset' can be used to access elements of a char-table.
5794 Each of the char-table elements control how to display the corresponding
5795 text character: the element at index C in the table says how to display
5796 the character whose code is C. Each element should be a vector of
5797 characters or nil. The value nil means display the character in the
5798 default fashion; otherwise, the characters from the vector are delivered
5799 to the screen instead of the original character.
5801 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5802 to display a capital Y instead of each X character.
5804 In addition, a char-table has six extra slots to control the display of:
5806 the end of a truncated screen line (extra-slot 0, a single character);
5807 the end of a continued line (extra-slot 1, a single character);
5808 the escape character used to display character codes in octal
5809 (extra-slot 2, a single character);
5810 the character used as an arrow for control characters (extra-slot 3,
5811 a single character);
5812 the decoration indicating the presence of invisible lines (extra-slot 4,
5813 a vector of characters);
5814 the character used to draw the border between side-by-side windows
5815 (extra-slot 5, a single character).
5817 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5819 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5821 doc
: /* *Width of left marginal area for display of a buffer.
5822 A value of nil means no marginal area. */);
5824 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5826 doc
: /* *Width of right marginal area for display of a buffer.
5827 A value of nil means no marginal area. */);
5829 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5831 doc
: /* *Width of this buffer's left fringe (in pixels).
5832 A value of 0 means no left fringe is shown in this buffer's window.
5833 A value of nil means to use the left fringe width from the window's frame. */);
5835 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5837 doc
: /* *Width of this buffer's right fringe (in pixels).
5838 A value of 0 means no right fringe is shown in this buffer's window.
5839 A value of nil means to use the right fringe width from the window's frame. */);
5841 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5843 doc
: /* *Non-nil means to display fringes outside display margins.
5844 A value of nil means to display fringes between margins and buffer text. */);
5846 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5848 doc
: /* *Width of this buffer's scroll bars in pixels.
5849 A value of nil means to use the scroll bar width from the window's frame. */);
5851 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5853 doc
: /* *Position of this buffer's vertical scroll bar.
5854 The value takes effect whenever you tell a window to display this buffer;
5855 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5857 A value of `left' or `right' means put the vertical scroll bar at that side
5858 of the window; a value of nil means don't show any vertical scroll bars.
5859 A value of t (the default) means do whatever the window's frame specifies. */);
5861 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5862 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5863 doc
: /* *Visually indicate empty lines after the buffer end.
5864 If non-nil, a bitmap is displayed in the left fringe of a window on
5865 window-systems. */);
5867 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5868 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
5869 doc
: /* *Visually indicate buffer boundaries and scrolling.
5870 If non-nil, the first and last line of the buffer are marked in the fringe
5871 of a window on window-systems with angle bitmaps, or if the window can be
5872 scrolled, the top and bottom line of the window are marked with up and down
5875 If value is a symbol `left' or `right', both angle and arrow bitmaps
5876 are displayed in the left or right fringe, resp. Any other value
5877 that doesn't look like an alist means display the angle bitmaps in
5878 the left fringe but no arrows.
5880 You can exercise more precise control by using an alist as the
5881 value. Each alist element (INDICATOR . POSITION) specifies
5882 where to show one of the indicators. INDICATOR is one of `top',
5883 `bottom', `up', `down', or t, which specifies the default position,
5884 and POSITION is one of `left', `right', or nil, meaning do not show
5887 For example, ((top . left) (t . right)) places the top angle bitmap in
5888 left fringe, the bottom angle bitmap in right fringe, and both arrow
5889 bitmaps in right fringe. To show just the angle bitmaps in the left
5890 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5892 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5893 ¤t_buffer
->fringe_indicator_alist
, Qnil
,
5894 doc
: /* *Mapping from logical to physical fringe indicator bitmaps.
5895 The value is an alist where each element (INDICATOR . BITMAPS)
5896 specifies the fringe bitmaps used to display a specific logical
5899 INDICATOR specifies the logical indicator type which is one of the
5900 following symbols: `truncation' , `continuation', `overlay-arrow',
5901 `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'.
5903 BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5904 the actual bitmap shown in the left or right fringe for the logical
5905 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5906 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5907 are used only for the `bottom' and `top-bottom' indicators when the
5908 last (only) line has no final newline. BITMAPS may also be a single
5909 symbol which is used in both left and right fringes. */);
5911 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5912 ¤t_buffer
->fringe_cursor_alist
, Qnil
,
5913 doc
: /* *Mapping from logical to physical fringe cursor bitmaps.
5914 The value is an alist where each element (CURSOR . BITMAP)
5915 specifies the fringe bitmaps used to display a specific logical
5916 cursor type in the fringe.
5918 CURSOR specifies the logical cursor type which is one of the following
5919 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5920 one is used to show a hollow cursor on narrow lines display lines
5921 where the normal hollow cursor will not fit.
5923 BITMAP is the corresponding fringe bitmap shown for the logical
5926 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5927 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5928 doc
: /* How far to scroll windows upward.
5929 If you move point off the bottom, the window scrolls automatically.
5930 This variable controls how far it scrolls. The value nil, the default,
5931 means scroll to center point. A fraction means scroll to put point
5932 that fraction of the window's height from the bottom of the window.
5933 When the value is 0.0, point goes at the bottom line, which in the
5934 simple case that you moved off with C-f means scrolling just one line.
5935 1.0 means point goes at the top, so that in that simple case, the
5936 window scrolls by a full window height. Meaningful values are
5937 between 0.0 and 1.0, inclusive. */);
5939 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5940 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5941 doc
: /* How far to scroll windows downward.
5942 If you move point off the top, the window scrolls automatically.
5943 This variable controls how far it scrolls. The value nil, the default,
5944 means scroll to center point. A fraction means scroll to put point
5945 that fraction of the window's height from the top of the window.
5946 When the value is 0.0, point goes at the top line, which in the
5947 simple case that you moved off with C-b means scrolling just one line.
5948 1.0 means point goes at the bottom, so that in that simple case, the
5949 window scrolls by a full window height. Meaningful values are
5950 between 0.0 and 1.0, inclusive. */);
5952 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5956 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5957 doc
: /* List of functions to call before each text change.
5958 Two arguments are passed to each function: the positions of
5959 the beginning and end of the range of old text to be changed.
5960 \(For an insertion, the beginning and end are at the same place.)
5961 No information is given about the length of the text after the change.
5963 Buffer changes made while executing the `before-change-functions'
5964 don't call any before-change or after-change functions.
5965 That's because these variables are temporarily set to nil.
5966 As a result, a hook function cannot straightforwardly alter the
5967 value of these variables. See the Emacs Lisp manual for a way of
5968 accomplishing an equivalent result by using other variables.
5970 If an unhandled error happens in running these functions,
5971 the variable's value remains nil. That prevents the error
5972 from happening repeatedly and making Emacs nonfunctional. */);
5973 Vbefore_change_functions
= Qnil
;
5975 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5976 doc
: /* List of functions to call after each text change.
5977 Three arguments are passed to each function: the positions of
5978 the beginning and end of the range of changed text,
5979 and the length in bytes of the pre-change text replaced by that range.
5980 \(For an insertion, the pre-change length is zero;
5981 for a deletion, that length is the number of bytes deleted,
5982 and the post-change beginning and end are at the same place.)
5984 Buffer changes made while executing the `after-change-functions'
5985 don't call any before-change or after-change functions.
5986 That's because these variables are temporarily set to nil.
5987 As a result, a hook function cannot straightforwardly alter the
5988 value of these variables. See the Emacs Lisp manual for a way of
5989 accomplishing an equivalent result by using other variables.
5991 If an unhandled error happens in running these functions,
5992 the variable's value remains nil. That prevents the error
5993 from happening repeatedly and making Emacs nonfunctional. */);
5994 Vafter_change_functions
= Qnil
;
5996 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5997 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5998 The functions are run using the `run-hooks' function. */);
5999 Vfirst_change_hook
= Qnil
;
6001 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
6002 doc
: /* List of undo entries in current buffer.
6003 Recent changes come first; older changes follow newer.
6005 An entry (BEG . END) represents an insertion which begins at
6006 position BEG and ends at position END.
6008 An entry (TEXT . POSITION) represents the deletion of the string TEXT
6009 from (abs POSITION). If POSITION is positive, point was at the front
6010 of the text being deleted; if negative, point was at the end.
6012 An entry (t HIGH . LOW) indicates that the buffer previously had
6013 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
6014 of the visited file's modification time, as of that time. If the
6015 modification time of the most recent save is different, this entry is
6018 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
6019 was modified between BEG and END. PROPERTY is the property name,
6020 and VALUE is the old value.
6022 An entry (apply FUN-NAME . ARGS) means undo the change with
6023 \(apply FUN-NAME ARGS).
6025 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
6026 in the active region. BEG and END is the range affected by this entry
6027 and DELTA is the number of bytes added or deleted in that range by
6030 An entry (MARKER . DISTANCE) indicates that the marker MARKER
6031 was adjusted in position by the offset DISTANCE (an integer).
6033 An entry of the form POSITION indicates that point was at the buffer
6034 location given by the integer. Undoing an entry of this form places
6037 Entries with value `nil' mark undo boundaries. The undo command treats
6038 the changes between two undo boundaries as a single step to be undone.
6040 If the value of the variable is t, undo information is not recorded. */);
6042 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
6043 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
6045 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
6046 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
6048 Normally, the line-motion functions work by scanning the buffer for
6049 newlines. Columnar operations (like `move-to-column' and
6050 `compute-motion') also work by scanning the buffer, summing character
6051 widths as they go. This works well for ordinary text, but if the
6052 buffer's lines are very long (say, more than 500 characters), these
6053 motion functions will take longer to execute. Emacs may also take
6054 longer to update the display.
6056 If `cache-long-line-scans' is non-nil, these motion functions cache the
6057 results of their scans, and consult the cache to avoid rescanning
6058 regions of the buffer until the text is modified. The caches are most
6059 beneficial when they prevent the most searching---that is, when the
6060 buffer contains long lines and large regions of characters with the
6061 same, fixed screen width.
6063 When `cache-long-line-scans' is non-nil, processing short lines will
6064 become slightly slower (because of the overhead of consulting the
6065 cache), and the caches will use memory roughly proportional to the
6066 number of newlines and characters whose screen width varies.
6068 The caches require no explicit maintenance; their accuracy is
6069 maintained internally by the Emacs primitives. Enabling or disabling
6070 the cache should not affect the behavior of any of the motion
6071 functions; it should only affect their performance. */);
6073 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
6074 doc
: /* Value of point before the last series of scroll operations, or nil. */);
6076 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
6077 doc
: /* List of formats to use when saving this buffer.
6078 Formats are defined by `format-alist'. This variable is
6079 set when a file is visited. */);
6081 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
6082 ¤t_buffer
->auto_save_file_format
, Qnil
,
6083 doc
: /* *Format in which to write auto-save files.
6084 Should be a list of symbols naming formats that are defined in `format-alist'.
6085 If it is t, which is the default, auto-save files are written in the
6086 same format as a regular save would use. */);
6088 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
6089 ¤t_buffer
->invisibility_spec
, Qnil
,
6090 doc
: /* Invisibility spec of this buffer.
6091 The default is t, which means that text is invisible
6092 if it has a non-nil `invisible' property.
6093 If the value is a list, a text character is invisible if its `invisible'
6094 property is an element in that list (or is a list with members in common).
6095 If an element is a cons cell of the form (PROP . ELLIPSIS),
6096 then characters with property value PROP are invisible,
6097 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
6099 DEFVAR_PER_BUFFER ("buffer-display-count",
6100 ¤t_buffer
->display_count
, Qnil
,
6101 doc
: /* A number incremented each time this buffer is displayed in a window.
6102 The function `set-window-buffer' increments it. */);
6104 DEFVAR_PER_BUFFER ("buffer-display-time",
6105 ¤t_buffer
->display_time
, Qnil
,
6106 doc
: /* Time stamp updated each time this buffer is displayed in a window.
6107 The function `set-window-buffer' updates this variable
6108 to the value obtained by calling `current-time'.
6109 If the buffer has never been shown in a window, the value is nil. */);
6111 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
6113 Vtransient_mark_mode
= Qnil
;
6114 /* The docstring is in simple.el. If we put it here, it would be
6115 overwritten when transient-mark-mode is defined using
6116 define-minor-mode. */
6118 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
6119 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
6120 If the value is t, disregard `buffer-read-only' and all `read-only'
6121 text properties. If the value is a list, disregard `buffer-read-only'
6122 and disregard a `read-only' text property if the property value
6123 is a member of the list. */);
6124 Vinhibit_read_only
= Qnil
;
6126 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
6127 doc
: /* Cursor to use when this buffer is in the selected window.
6128 Values are interpreted as follows:
6130 t use the cursor specified for the frame
6131 nil don't display a cursor
6132 box display a filled box cursor
6133 hollow display a hollow box cursor
6134 bar display a vertical bar cursor with default width
6135 (bar . WIDTH) display a vertical bar cursor with width WIDTH
6136 hbar display a horizontal bar cursor with default height
6137 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
6138 ANYTHING ELSE display a hollow box cursor
6140 When the buffer is displayed in a non-selected window, the
6141 cursor's appearance is instead controlled by the variable
6142 `cursor-in-non-selected-windows'. */);
6144 DEFVAR_PER_BUFFER ("line-spacing",
6145 ¤t_buffer
->extra_line_spacing
, Qnil
,
6146 doc
: /* Additional space to put between lines when displaying a buffer.
6147 The space is measured in pixels, and put below lines on graphic displays,
6148 see `display-graphic-p'.
6149 If value is a floating point number, it specifies the spacing relative
6150 to the default frame line height. A value of nil means add no extra space. */);
6152 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
6153 ¤t_buffer
->cursor_in_non_selected_windows
, Qnil
,
6154 doc
: /* *Cursor type to display in non-selected windows.
6155 The value t means to use hollow box cursor. See `cursor-type' for other values. */);
6157 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
6158 doc
: /* List of functions called with no args to query before killing a buffer.
6159 The buffer being killed will be current while the functions are running.
6160 If any of them returns nil, the buffer is not killed. */);
6161 Vkill_buffer_query_functions
= Qnil
;
6163 DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook
,
6164 doc
: /* Normal hook run before changing the major mode of a buffer.
6165 The function `kill-all-local-variables' runs this before doing anything else. */);
6166 Vchange_major_mode_hook
= Qnil
;
6167 Qchange_major_mode_hook
= intern_c_string ("change-major-mode-hook");
6168 staticpro (&Qchange_major_mode_hook
);
6170 defsubr (&Sbuffer_live_p
);
6171 defsubr (&Sbuffer_list
);
6172 defsubr (&Sget_buffer
);
6173 defsubr (&Sget_file_buffer
);
6174 defsubr (&Sget_buffer_create
);
6175 defsubr (&Smake_indirect_buffer
);
6176 defsubr (&Sgenerate_new_buffer_name
);
6177 defsubr (&Sbuffer_name
);
6178 /*defsubr (&Sbuffer_number);*/
6179 defsubr (&Sbuffer_file_name
);
6180 defsubr (&Sbuffer_base_buffer
);
6181 defsubr (&Sbuffer_local_value
);
6182 defsubr (&Sbuffer_local_variables
);
6183 defsubr (&Sbuffer_modified_p
);
6184 defsubr (&Sset_buffer_modified_p
);
6185 defsubr (&Sbuffer_modified_tick
);
6186 defsubr (&Sbuffer_chars_modified_tick
);
6187 defsubr (&Srename_buffer
);
6188 defsubr (&Sother_buffer
);
6189 defsubr (&Sbuffer_enable_undo
);
6190 defsubr (&Skill_buffer
);
6191 defsubr (&Sset_buffer_major_mode
);
6192 defsubr (&Sswitch_to_buffer
);
6193 defsubr (&Scurrent_buffer
);
6194 defsubr (&Sset_buffer
);
6195 defsubr (&Sbarf_if_buffer_read_only
);
6196 defsubr (&Sbury_buffer
);
6197 defsubr (&Serase_buffer
);
6198 defsubr (&Sbuffer_swap_text
);
6199 defsubr (&Sset_buffer_multibyte
);
6200 defsubr (&Skill_all_local_variables
);
6202 defsubr (&Soverlayp
);
6203 defsubr (&Smake_overlay
);
6204 defsubr (&Sdelete_overlay
);
6205 defsubr (&Smove_overlay
);
6206 defsubr (&Soverlay_start
);
6207 defsubr (&Soverlay_end
);
6208 defsubr (&Soverlay_buffer
);
6209 defsubr (&Soverlay_properties
);
6210 defsubr (&Soverlays_at
);
6211 defsubr (&Soverlays_in
);
6212 defsubr (&Snext_overlay_change
);
6213 defsubr (&Sprevious_overlay_change
);
6214 defsubr (&Soverlay_recenter
);
6215 defsubr (&Soverlay_lists
);
6216 defsubr (&Soverlay_get
);
6217 defsubr (&Soverlay_put
);
6218 defsubr (&Srestore_buffer_modified_p
);
6222 keys_of_buffer (void)
6224 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6225 initial_define_key (control_x_map
, 'k', "kill-buffer");
6227 /* This must not be in syms_of_buffer, because Qdisabled is not
6228 initialized when that function gets called. */
6229 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);
6232 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
6233 (do not change this comment) */