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 extern Lisp_Object Qapply
;
2516 current_buffer
->undo_list
= Fcons (list3 (Qapply
,
2517 intern ("set-buffer-multibyte"),
2518 NILP (flag
) ? Qt
: Qnil
),
2524 /* Changing the multibyteness of a buffer means that all windows
2525 showing that buffer must be updated thoroughly. */
2526 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2527 ++windows_or_buffers_changed
;
2529 /* Copy this buffer's new multibyte status
2530 into all of its indirect buffers. */
2531 for (other
= all_buffers
; other
; other
= other
->next
)
2532 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2534 other
->enable_multibyte_characters
2535 = current_buffer
->enable_multibyte_characters
;
2536 other
->prevent_redisplay_optimizations_p
= 1;
2539 /* Restore the modifiedness of the buffer. */
2540 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2541 Fset_buffer_modified_p (Qnil
);
2543 /* Update coding systems of this buffer's process (if any). */
2545 Lisp_Object process
;
2547 process
= Fget_buffer_process (Fcurrent_buffer ());
2548 if (PROCESSP (process
))
2549 setup_process_coding_systems (process
);
2555 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2557 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2558 Most local variable bindings are eliminated so that the default values
2559 become effective once more. Also, the syntax table is set from
2560 `standard-syntax-table', the local keymap is set to nil,
2561 and the abbrev table from `fundamental-mode-abbrev-table'.
2562 This function also forces redisplay of the mode line.
2564 Every function to select a new major mode starts by
2565 calling this function.
2567 As a special exception, local variables whose names have
2568 a non-nil `permanent-local' property are not eliminated by this function.
2570 The first thing this function does is run
2571 the normal hook `change-major-mode-hook'. */)
2574 if (!NILP (Vrun_hooks
))
2575 call1 (Vrun_hooks
, Qchange_major_mode_hook
);
2577 /* Make sure none of the bindings in local_var_alist
2578 remain swapped in, in their symbols. */
2580 swap_out_buffer_local_variables (current_buffer
);
2582 /* Actually eliminate all local bindings of this buffer. */
2584 reset_buffer_local_variables (current_buffer
, 0);
2586 /* Force mode-line redisplay. Useful here because all major mode
2587 commands call this function. */
2588 update_mode_lines
++;
2593 /* Make sure no local variables remain set up with buffer B
2594 for their current values. */
2597 swap_out_buffer_local_variables (struct buffer
*b
)
2599 Lisp_Object oalist
, alist
, buffer
;
2601 XSETBUFFER (buffer
, b
);
2602 oalist
= b
->local_var_alist
;
2604 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2606 Lisp_Object sym
= XCAR (XCAR (alist
));
2607 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2608 /* Need not do anything if some other buffer's binding is
2610 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2612 /* Symbol is set up for this buffer's old local value:
2614 swap_in_global_binding (XSYMBOL (sym
));
2619 /* Find all the overlays in the current buffer that contain position POS.
2620 Return the number found, and store them in a vector in *VEC_PTR.
2621 Store in *LEN_PTR the size allocated for the vector.
2622 Store in *NEXT_PTR the next position after POS where an overlay starts,
2623 or ZV if there are no more overlays between POS and ZV.
2624 Store in *PREV_PTR the previous position before POS where an overlay ends,
2625 or where an overlay starts which ends at or after POS;
2626 or BEGV if there are no such overlays from BEGV to POS.
2627 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2629 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2630 when this function is called.
2632 If EXTEND is non-zero, we make the vector bigger if necessary.
2633 If EXTEND is zero, we never extend the vector,
2634 and we store only as many overlays as will fit.
2635 But we still return the total number of overlays.
2637 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2638 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2639 default (BEGV or ZV). */
2642 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
, int *len_ptr
,
2643 EMACS_INT
*next_ptr
, EMACS_INT
*prev_ptr
, int change_req
)
2645 Lisp_Object overlay
, start
, end
;
2646 struct Lisp_Overlay
*tail
;
2649 Lisp_Object
*vec
= *vec_ptr
;
2652 int inhibit_storing
= 0;
2654 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2656 int startpos
, endpos
;
2658 XSETMISC (overlay
, tail
);
2660 start
= OVERLAY_START (overlay
);
2661 end
= OVERLAY_END (overlay
);
2662 endpos
= OVERLAY_POSITION (end
);
2669 startpos
= OVERLAY_POSITION (start
);
2670 /* This one ends at or after POS
2671 so its start counts for PREV_PTR if it's before POS. */
2672 if (prev
< startpos
&& startpos
< pos
)
2676 if (startpos
<= pos
)
2680 /* The supplied vector is full.
2681 Either make it bigger, or don't store any more in it. */
2684 /* Make it work with an initial len == 0. */
2689 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2693 inhibit_storing
= 1;
2696 if (!inhibit_storing
)
2698 /* Keep counting overlays even if we can't return them all. */
2701 else if (startpos
< next
)
2705 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2707 int startpos
, endpos
;
2709 XSETMISC (overlay
, tail
);
2711 start
= OVERLAY_START (overlay
);
2712 end
= OVERLAY_END (overlay
);
2713 startpos
= OVERLAY_POSITION (start
);
2716 if (startpos
< next
)
2720 endpos
= OVERLAY_POSITION (end
);
2727 /* Make it work with an initial len == 0. */
2732 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2736 inhibit_storing
= 1;
2739 if (!inhibit_storing
)
2743 if (startpos
< pos
&& startpos
> prev
)
2746 else if (endpos
< pos
&& endpos
> prev
)
2748 else if (endpos
== pos
&& startpos
> prev
2749 && (!change_req
|| startpos
< pos
))
2760 /* Find all the overlays in the current buffer that overlap the range
2761 BEG-END, or are empty at BEG, or are empty at END provided END
2762 denotes the position at the end of the current buffer.
2764 Return the number found, and store them in a vector in *VEC_PTR.
2765 Store in *LEN_PTR the size allocated for the vector.
2766 Store in *NEXT_PTR the next position after POS where an overlay starts,
2767 or ZV if there are no more overlays.
2768 Store in *PREV_PTR the previous position before POS where an overlay ends,
2769 or BEGV if there are no previous overlays.
2770 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2772 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2773 when this function is called.
2775 If EXTEND is non-zero, we make the vector bigger if necessary.
2776 If EXTEND is zero, we never extend the vector,
2777 and we store only as many overlays as will fit.
2778 But we still return the total number of overlays. */
2781 overlays_in (int beg
, int end
, int extend
, Lisp_Object
**vec_ptr
, int *len_ptr
,
2782 int *next_ptr
, int *prev_ptr
)
2784 Lisp_Object overlay
, ostart
, oend
;
2785 struct Lisp_Overlay
*tail
;
2788 Lisp_Object
*vec
= *vec_ptr
;
2791 int inhibit_storing
= 0;
2792 int end_is_Z
= end
== Z
;
2794 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2796 int startpos
, endpos
;
2798 XSETMISC (overlay
, tail
);
2800 ostart
= OVERLAY_START (overlay
);
2801 oend
= OVERLAY_END (overlay
);
2802 endpos
= OVERLAY_POSITION (oend
);
2809 startpos
= OVERLAY_POSITION (ostart
);
2810 /* Count an interval if it overlaps the range, is empty at the
2811 start of the range, or is empty at END provided END denotes the
2812 end of the buffer. */
2813 if ((beg
< endpos
&& startpos
< end
)
2814 || (startpos
== endpos
2815 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2819 /* The supplied vector is full.
2820 Either make it bigger, or don't store any more in it. */
2823 /* Make it work with an initial len == 0. */
2828 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2832 inhibit_storing
= 1;
2835 if (!inhibit_storing
)
2837 /* Keep counting overlays even if we can't return them all. */
2840 else if (startpos
< next
)
2844 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2846 int startpos
, endpos
;
2848 XSETMISC (overlay
, tail
);
2850 ostart
= OVERLAY_START (overlay
);
2851 oend
= OVERLAY_END (overlay
);
2852 startpos
= OVERLAY_POSITION (ostart
);
2855 if (startpos
< next
)
2859 endpos
= OVERLAY_POSITION (oend
);
2860 /* Count an interval if it overlaps the range, is empty at the
2861 start of the range, or is empty at END provided END denotes the
2862 end of the buffer. */
2863 if ((beg
< endpos
&& startpos
< end
)
2864 || (startpos
== endpos
2865 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2871 /* Make it work with an initial len == 0. */
2876 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2880 inhibit_storing
= 1;
2883 if (!inhibit_storing
)
2887 else if (endpos
< beg
&& endpos
> prev
)
2899 /* Return non-zero if there exists an overlay with a non-nil
2900 `mouse-face' property overlapping OVERLAY. */
2903 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2905 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2906 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2908 Lisp_Object
*v
, tem
;
2911 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2912 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2915 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2916 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2919 for (i
= 0; i
< n
; ++i
)
2920 if (!EQ (v
[i
], overlay
)
2921 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2930 /* Fast function to just test if we're at an overlay boundary. */
2932 overlay_touches_p (int pos
)
2934 Lisp_Object overlay
;
2935 struct Lisp_Overlay
*tail
;
2937 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2941 XSETMISC (overlay
,tail
);
2942 if (!OVERLAYP (overlay
))
2945 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2948 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2952 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2956 XSETMISC (overlay
, tail
);
2957 if (!OVERLAYP (overlay
))
2960 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2963 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2971 Lisp_Object overlay
;
2977 compare_overlays (const void *v1
, const void *v2
)
2979 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2980 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2981 if (s1
->priority
!= s2
->priority
)
2982 return s1
->priority
- s2
->priority
;
2983 if (s1
->beg
!= s2
->beg
)
2984 return s1
->beg
- s2
->beg
;
2985 if (s1
->end
!= s2
->end
)
2986 return s2
->end
- s1
->end
;
2990 /* Sort an array of overlays by priority. The array is modified in place.
2991 The return value is the new size; this may be smaller than the original
2992 size if some of the overlays were invalid or were window-specific. */
2994 sort_overlays (Lisp_Object
*overlay_vec
, int noverlays
, struct window
*w
)
2997 struct sortvec
*sortvec
;
2998 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
3000 /* Put the valid and relevant overlays into sortvec. */
3002 for (i
= 0, j
= 0; i
< noverlays
; i
++)
3005 Lisp_Object overlay
;
3007 overlay
= overlay_vec
[i
];
3008 if (OVERLAY_VALID (overlay
)
3009 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
3010 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
3012 /* If we're interested in a specific window, then ignore
3013 overlays that are limited to some other window. */
3018 window
= Foverlay_get (overlay
, Qwindow
);
3019 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3023 /* This overlay is good and counts: put it into sortvec. */
3024 sortvec
[j
].overlay
= overlay
;
3025 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3026 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3027 tem
= Foverlay_get (overlay
, Qpriority
);
3029 sortvec
[j
].priority
= XINT (tem
);
3031 sortvec
[j
].priority
= 0;
3037 /* Sort the overlays into the proper order: increasing priority. */
3040 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
3042 for (i
= 0; i
< noverlays
; i
++)
3043 overlay_vec
[i
] = sortvec
[i
].overlay
;
3049 Lisp_Object string
, string2
;
3056 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
3057 int size
; /* Allocated length of that array. */
3058 int used
; /* How much of the array is currently in use. */
3059 int bytes
; /* Total length of the strings in buf. */
3062 /* Buffers for storing information about the overlays touching a given
3063 position. These could be automatic variables in overlay_strings, but
3064 it's more efficient to hold onto the memory instead of repeatedly
3065 allocating and freeing it. */
3066 static struct sortstrlist overlay_heads
, overlay_tails
;
3067 static unsigned char *overlay_str_buf
;
3069 /* Allocated length of overlay_str_buf. */
3070 static int overlay_str_len
;
3072 /* A comparison function suitable for passing to qsort. */
3074 cmp_for_strings (const void *as1
, const void *as2
)
3076 struct sortstr
*s1
= (struct sortstr
*)as1
;
3077 struct sortstr
*s2
= (struct sortstr
*)as2
;
3078 if (s1
->size
!= s2
->size
)
3079 return s2
->size
- s1
->size
;
3080 if (s1
->priority
!= s2
->priority
)
3081 return s1
->priority
- s2
->priority
;
3086 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
, Lisp_Object str2
, Lisp_Object pri
, int size
)
3090 if (ssl
->used
== ssl
->size
)
3096 ssl
->buf
= ((struct sortstr
*)
3097 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
3099 ssl
->buf
[ssl
->used
].string
= str
;
3100 ssl
->buf
[ssl
->used
].string2
= str2
;
3101 ssl
->buf
[ssl
->used
].size
= size
;
3102 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
3105 if (NILP (current_buffer
->enable_multibyte_characters
))
3106 nbytes
= SCHARS (str
);
3107 else if (! STRING_MULTIBYTE (str
))
3108 nbytes
= count_size_as_multibyte (SDATA (str
),
3111 nbytes
= SBYTES (str
);
3113 ssl
->bytes
+= nbytes
;
3117 if (NILP (current_buffer
->enable_multibyte_characters
))
3118 nbytes
= SCHARS (str2
);
3119 else if (! STRING_MULTIBYTE (str2
))
3120 nbytes
= count_size_as_multibyte (SDATA (str2
),
3123 nbytes
= SBYTES (str2
);
3125 ssl
->bytes
+= nbytes
;
3129 /* Return the concatenation of the strings associated with overlays that
3130 begin or end at POS, ignoring overlays that are specific to a window
3131 other than W. The strings are concatenated in the appropriate order:
3132 shorter overlays nest inside longer ones, and higher priority inside
3133 lower. Normally all of the after-strings come first, but zero-sized
3134 overlays have their after-strings ride along with the before-strings
3135 because it would look strange to print them inside-out.
3137 Returns the string length, and stores the contents indirectly through
3138 PSTR, if that variable is non-null. The string may be overwritten by
3139 subsequent calls. */
3142 overlay_strings (EMACS_INT pos
, struct window
*w
, unsigned char **pstr
)
3144 Lisp_Object overlay
, window
, str
;
3145 struct Lisp_Overlay
*ov
;
3146 int startpos
, endpos
;
3147 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
3149 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3150 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3151 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3153 XSETMISC (overlay
, ov
);
3154 eassert (OVERLAYP (overlay
));
3156 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3157 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3160 if (endpos
!= pos
&& startpos
!= pos
)
3162 window
= Foverlay_get (overlay
, Qwindow
);
3163 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3166 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3167 record_overlay_string (&overlay_heads
, str
,
3169 ? Foverlay_get (overlay
, Qafter_string
)
3171 Foverlay_get (overlay
, Qpriority
),
3173 else if (endpos
== pos
3174 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3175 record_overlay_string (&overlay_tails
, str
, Qnil
,
3176 Foverlay_get (overlay
, Qpriority
),
3179 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3181 XSETMISC (overlay
, ov
);
3182 eassert (OVERLAYP (overlay
));
3184 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3185 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3188 if (endpos
!= pos
&& startpos
!= pos
)
3190 window
= Foverlay_get (overlay
, Qwindow
);
3191 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3194 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3195 record_overlay_string (&overlay_heads
, str
,
3197 ? Foverlay_get (overlay
, Qafter_string
)
3199 Foverlay_get (overlay
, Qpriority
),
3201 else if (endpos
== pos
3202 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3203 record_overlay_string (&overlay_tails
, str
, Qnil
,
3204 Foverlay_get (overlay
, Qpriority
),
3207 if (overlay_tails
.used
> 1)
3208 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3210 if (overlay_heads
.used
> 1)
3211 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3213 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3218 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3220 if (total
> overlay_str_len
)
3222 overlay_str_len
= total
;
3223 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3226 p
= overlay_str_buf
;
3227 for (i
= overlay_tails
.used
; --i
>= 0;)
3230 tem
= overlay_tails
.buf
[i
].string
;
3231 nbytes
= copy_text (SDATA (tem
), p
,
3233 STRING_MULTIBYTE (tem
), multibyte
);
3236 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3239 tem
= overlay_heads
.buf
[i
].string
;
3240 nbytes
= copy_text (SDATA (tem
), p
,
3242 STRING_MULTIBYTE (tem
), multibyte
);
3244 tem
= overlay_heads
.buf
[i
].string2
;
3247 nbytes
= copy_text (SDATA (tem
), p
,
3249 STRING_MULTIBYTE (tem
), multibyte
);
3253 if (p
!= overlay_str_buf
+ total
)
3256 *pstr
= overlay_str_buf
;
3262 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3265 recenter_overlay_lists (struct buffer
*buf
, EMACS_INT pos
)
3267 Lisp_Object overlay
, beg
, end
;
3268 struct Lisp_Overlay
*prev
, *tail
, *next
;
3270 /* See if anything in overlays_before should move to overlays_after. */
3272 /* We don't strictly need prev in this loop; it should always be nil.
3273 But we use it for symmetry and in case that should cease to be true
3274 with some future change. */
3276 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3279 XSETMISC (overlay
, tail
);
3281 /* If the overlay is not valid, get rid of it. */
3282 if (!OVERLAY_VALID (overlay
))
3287 /* Splice the cons cell TAIL out of overlays_before. */
3291 buf
->overlays_before
= next
;
3297 beg
= OVERLAY_START (overlay
);
3298 end
= OVERLAY_END (overlay
);
3300 if (OVERLAY_POSITION (end
) > pos
)
3302 /* OVERLAY needs to be moved. */
3303 int where
= OVERLAY_POSITION (beg
);
3304 struct Lisp_Overlay
*other
, *other_prev
;
3306 /* Splice the cons cell TAIL out of overlays_before. */
3310 buf
->overlays_before
= next
;
3312 /* Search thru overlays_after for where to put it. */
3314 for (other
= buf
->overlays_after
; other
;
3315 other_prev
= other
, other
= other
->next
)
3317 Lisp_Object otherbeg
, otheroverlay
;
3319 XSETMISC (otheroverlay
, other
);
3320 eassert (OVERLAY_VALID (otheroverlay
));
3322 otherbeg
= OVERLAY_START (otheroverlay
);
3323 if (OVERLAY_POSITION (otherbeg
) >= where
)
3327 /* Add TAIL to overlays_after before OTHER. */
3330 other_prev
->next
= tail
;
3332 buf
->overlays_after
= tail
;
3336 /* We've reached the things that should stay in overlays_before.
3337 All the rest of overlays_before must end even earlier,
3342 /* See if anything in overlays_after should be in overlays_before. */
3344 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3347 XSETMISC (overlay
, tail
);
3349 /* If the overlay is not valid, get rid of it. */
3350 if (!OVERLAY_VALID (overlay
))
3355 /* Splice the cons cell TAIL out of overlays_after. */
3359 buf
->overlays_after
= next
;
3365 beg
= OVERLAY_START (overlay
);
3366 end
= OVERLAY_END (overlay
);
3368 /* Stop looking, when we know that nothing further
3369 can possibly end before POS. */
3370 if (OVERLAY_POSITION (beg
) > pos
)
3373 if (OVERLAY_POSITION (end
) <= pos
)
3375 /* OVERLAY needs to be moved. */
3376 int where
= OVERLAY_POSITION (end
);
3377 struct Lisp_Overlay
*other
, *other_prev
;
3379 /* Splice the cons cell TAIL out of overlays_after. */
3383 buf
->overlays_after
= next
;
3385 /* Search thru overlays_before for where to put it. */
3387 for (other
= buf
->overlays_before
; other
;
3388 other_prev
= other
, other
= other
->next
)
3390 Lisp_Object otherend
, otheroverlay
;
3392 XSETMISC (otheroverlay
, other
);
3393 eassert (OVERLAY_VALID (otheroverlay
));
3395 otherend
= OVERLAY_END (otheroverlay
);
3396 if (OVERLAY_POSITION (otherend
) <= where
)
3400 /* Add TAIL to overlays_before before OTHER. */
3403 other_prev
->next
= tail
;
3405 buf
->overlays_before
= tail
;
3410 buf
->overlay_center
= pos
;
3414 adjust_overlays_for_insert (EMACS_INT pos
, EMACS_INT length
)
3416 /* After an insertion, the lists are still sorted properly,
3417 but we may need to update the value of the overlay center. */
3418 if (current_buffer
->overlay_center
>= pos
)
3419 current_buffer
->overlay_center
+= length
;
3423 adjust_overlays_for_delete (EMACS_INT pos
, EMACS_INT length
)
3425 if (current_buffer
->overlay_center
< pos
)
3426 /* The deletion was to our right. No change needed; the before- and
3427 after-lists are still consistent. */
3429 else if (current_buffer
->overlay_center
> pos
+ length
)
3430 /* The deletion was to our left. We need to adjust the center value
3431 to account for the change in position, but the lists are consistent
3432 given the new value. */
3433 current_buffer
->overlay_center
-= length
;
3435 /* We're right in the middle. There might be things on the after-list
3436 that now belong on the before-list. Recentering will move them,
3437 and also update the center point. */
3438 recenter_overlay_lists (current_buffer
, pos
);
3441 /* Fix up overlays that were garbled as a result of permuting markers
3442 in the range START through END. Any overlay with at least one
3443 endpoint in this range will need to be unlinked from the overlay
3444 list and reinserted in its proper place.
3445 Such an overlay might even have negative size at this point.
3446 If so, we'll make the overlay empty. */
3448 fix_start_end_in_overlays (register int start
, register int end
)
3450 Lisp_Object overlay
;
3451 struct Lisp_Overlay
*before_list
, *after_list
;
3452 /* These are either nil, indicating that before_list or after_list
3453 should be assigned, or the cons cell the cdr of which should be
3455 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3456 /* 'Parent', likewise, indicates a cons cell or
3457 current_buffer->overlays_before or overlays_after, depending
3458 which loop we're in. */
3459 struct Lisp_Overlay
*tail
, *parent
;
3460 int startpos
, endpos
;
3462 /* This algorithm shifts links around instead of consing and GCing.
3463 The loop invariant is that before_list (resp. after_list) is a
3464 well-formed list except that its last element, the CDR of beforep
3465 (resp. afterp) if beforep (afterp) isn't nil or before_list
3466 (after_list) if it is, is still uninitialized. So it's not a bug
3467 that before_list isn't initialized, although it may look
3469 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3471 XSETMISC (overlay
, tail
);
3473 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3474 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3476 /* If the overlay is backwards, make it empty. */
3477 if (endpos
< startpos
)
3480 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3488 || (startpos
>= start
&& startpos
< end
))
3490 /* Add it to the end of the wrong list. Later on,
3491 recenter_overlay_lists will move it to the right place. */
3492 if (endpos
< current_buffer
->overlay_center
)
3497 afterp
->next
= tail
;
3505 beforep
->next
= tail
;
3509 current_buffer
->overlays_before
= tail
->next
;
3511 parent
->next
= tail
->next
;
3515 parent
= tail
, tail
= parent
->next
;
3517 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3519 XSETMISC (overlay
, tail
);
3521 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3522 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3524 /* If the overlay is backwards, make it empty. */
3525 if (endpos
< startpos
)
3528 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3532 if (startpos
>= end
)
3535 if (startpos
>= start
3536 || (endpos
>= start
&& endpos
< end
))
3538 if (endpos
< current_buffer
->overlay_center
)
3543 afterp
->next
= tail
;
3551 beforep
->next
= tail
;
3555 current_buffer
->overlays_after
= tail
->next
;
3557 parent
->next
= tail
->next
;
3561 parent
= tail
, tail
= parent
->next
;
3564 /* Splice the constructed (wrong) lists into the buffer's lists,
3565 and let the recenter function make it sane again. */
3568 beforep
->next
= current_buffer
->overlays_before
;
3569 current_buffer
->overlays_before
= before_list
;
3571 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3575 afterp
->next
= current_buffer
->overlays_after
;
3576 current_buffer
->overlays_after
= after_list
;
3578 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3581 /* We have two types of overlay: the one whose ending marker is
3582 after-insertion-marker (this is the usual case) and the one whose
3583 ending marker is before-insertion-marker. When `overlays_before'
3584 contains overlays of the latter type and the former type in this
3585 order and both overlays end at inserting position, inserting a text
3586 increases only the ending marker of the latter type, which results
3587 in incorrect ordering of `overlays_before'.
3589 This function fixes ordering of overlays in the slot
3590 `overlays_before' of the buffer *BP. Before the insertion, `point'
3591 was at PREV, and now is at POS. */
3594 fix_overlays_before (struct buffer
*bp
, EMACS_INT prev
, EMACS_INT pos
)
3596 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3597 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3601 /* After the insertion, the several overlays may be in incorrect
3602 order. The possibility is that, in the list `overlays_before',
3603 an overlay which ends at POS appears after an overlay which ends
3604 at PREV. Since POS is greater than PREV, we must fix the
3605 ordering of these overlays, by moving overlays ends at POS before
3606 the overlays ends at PREV. */
3608 /* At first, find a place where disordered overlays should be linked
3609 in. It is where an overlay which end before POS exists. (i.e. an
3610 overlay whose ending marker is after-insertion-marker if disorder
3613 && (XSETMISC (tem
, tail
),
3614 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3620 /* If we don't find such an overlay,
3621 or the found one ends before PREV,
3622 or the found one is the last one in the list,
3623 we don't have to fix anything. */
3624 if (!tail
|| end
< prev
|| !tail
->next
)
3627 right_pair
= parent
;
3631 /* Now, end position of overlays in the list TAIL should be before
3632 or equal to PREV. In the loop, an overlay which ends at POS is
3633 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3634 we found an overlay which ends before PREV, the remaining
3635 overlays are in correct order. */
3638 XSETMISC (tem
, tail
);
3639 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3642 { /* This overlay is disordered. */
3643 struct Lisp_Overlay
*found
= tail
;
3645 /* Unlink the found overlay. */
3647 parent
->next
= tail
;
3648 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3649 and link it into the right place. */
3652 found
->next
= bp
->overlays_before
;
3653 bp
->overlays_before
= found
;
3657 found
->next
= right_pair
->next
;
3658 right_pair
->next
= found
;
3661 else if (end
== prev
)
3666 else /* No more disordered overlay. */
3671 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3672 doc
: /* Return t if OBJECT is an overlay. */)
3673 (Lisp_Object object
)
3675 return (OVERLAYP (object
) ? Qt
: Qnil
);
3678 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3679 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3680 If omitted, BUFFER defaults to the current buffer.
3681 BEG and END may be integers or markers.
3682 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3683 for the front of the overlay advance when text is inserted there
3684 \(which means the text *is not* included in the overlay).
3685 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3686 for the rear of the overlay advance when text is inserted there
3687 \(which means the text *is* included in the overlay). */)
3688 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3690 Lisp_Object overlay
;
3694 XSETBUFFER (buffer
, current_buffer
);
3696 CHECK_BUFFER (buffer
);
3698 && ! EQ (Fmarker_buffer (beg
), buffer
))
3699 error ("Marker points into wrong buffer");
3701 && ! EQ (Fmarker_buffer (end
), buffer
))
3702 error ("Marker points into wrong buffer");
3704 CHECK_NUMBER_COERCE_MARKER (beg
);
3705 CHECK_NUMBER_COERCE_MARKER (end
);
3707 if (XINT (beg
) > XINT (end
))
3710 temp
= beg
; beg
= end
; end
= temp
;
3713 b
= XBUFFER (buffer
);
3715 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3716 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3718 if (!NILP (front_advance
))
3719 XMARKER (beg
)->insertion_type
= 1;
3720 if (!NILP (rear_advance
))
3721 XMARKER (end
)->insertion_type
= 1;
3723 overlay
= allocate_misc ();
3724 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3725 XOVERLAY (overlay
)->start
= beg
;
3726 XOVERLAY (overlay
)->end
= end
;
3727 XOVERLAY (overlay
)->plist
= Qnil
;
3728 XOVERLAY (overlay
)->next
= NULL
;
3730 /* Put the new overlay on the wrong list. */
3731 end
= OVERLAY_END (overlay
);
3732 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3734 if (b
->overlays_after
)
3735 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3736 b
->overlays_after
= XOVERLAY (overlay
);
3740 if (b
->overlays_before
)
3741 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3742 b
->overlays_before
= XOVERLAY (overlay
);
3745 /* This puts it in the right list, and in the right order. */
3746 recenter_overlay_lists (b
, b
->overlay_center
);
3748 /* We don't need to redisplay the region covered by the overlay, because
3749 the overlay has no properties at the moment. */
3754 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3757 modify_overlay (struct buffer
*buf
, EMACS_INT start
, EMACS_INT end
)
3766 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3768 /* If this is a buffer not in the selected window,
3769 we must do other windows. */
3770 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3771 windows_or_buffers_changed
= 1;
3772 /* If multiple windows show this buffer, we must do other windows. */
3773 else if (buffer_shared
> 1)
3774 windows_or_buffers_changed
= 1;
3775 /* If we modify an overlay at the end of the buffer, we cannot
3776 be sure that window end is still valid. */
3777 else if (end
>= ZV
&& start
<= ZV
)
3778 windows_or_buffers_changed
= 1;
3780 ++BUF_OVERLAY_MODIFF (buf
);
3784 Lisp_Object
Fdelete_overlay (Lisp_Object overlay
);
3786 static struct Lisp_Overlay
*
3787 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3789 struct Lisp_Overlay
*tmp
, *prev
;
3790 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3794 prev
->next
= tmp
->next
;
3797 overlay
->next
= NULL
;
3803 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3804 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3805 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3806 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3808 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3810 struct buffer
*b
, *ob
;
3811 Lisp_Object obuffer
;
3812 int count
= SPECPDL_INDEX ();
3814 CHECK_OVERLAY (overlay
);
3816 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3818 XSETBUFFER (buffer
, current_buffer
);
3819 CHECK_BUFFER (buffer
);
3822 && ! EQ (Fmarker_buffer (beg
), buffer
))
3823 error ("Marker points into wrong buffer");
3825 && ! EQ (Fmarker_buffer (end
), buffer
))
3826 error ("Marker points into wrong buffer");
3828 CHECK_NUMBER_COERCE_MARKER (beg
);
3829 CHECK_NUMBER_COERCE_MARKER (end
);
3831 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3832 return Fdelete_overlay (overlay
);
3834 if (XINT (beg
) > XINT (end
))
3837 temp
= beg
; beg
= end
; end
= temp
;
3840 specbind (Qinhibit_quit
, Qt
);
3842 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3843 b
= XBUFFER (buffer
);
3844 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3846 /* If the overlay has changed buffers, do a thorough redisplay. */
3847 if (!EQ (buffer
, obuffer
))
3849 /* Redisplay where the overlay was. */
3850 if (!NILP (obuffer
))
3855 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3856 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3858 modify_overlay (ob
, o_beg
, o_end
);
3861 /* Redisplay where the overlay is going to be. */
3862 modify_overlay (b
, XINT (beg
), XINT (end
));
3865 /* Redisplay the area the overlay has just left, or just enclosed. */
3869 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3870 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3872 if (o_beg
== XINT (beg
))
3873 modify_overlay (b
, o_end
, XINT (end
));
3874 else if (o_end
== XINT (end
))
3875 modify_overlay (b
, o_beg
, XINT (beg
));
3878 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3879 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3880 modify_overlay (b
, o_beg
, o_end
);
3884 if (!NILP (obuffer
))
3887 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3889 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3890 eassert (XOVERLAY (overlay
)->next
== NULL
);
3893 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3894 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3896 /* Put the overlay on the wrong list. */
3897 end
= OVERLAY_END (overlay
);
3898 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3900 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3901 b
->overlays_after
= XOVERLAY (overlay
);
3905 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3906 b
->overlays_before
= XOVERLAY (overlay
);
3909 /* This puts it in the right list, and in the right order. */
3910 recenter_overlay_lists (b
, b
->overlay_center
);
3912 return unbind_to (count
, overlay
);
3915 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3916 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3917 (Lisp_Object overlay
)
3921 int count
= SPECPDL_INDEX ();
3923 CHECK_OVERLAY (overlay
);
3925 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3929 b
= XBUFFER (buffer
);
3930 specbind (Qinhibit_quit
, Qt
);
3932 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3933 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3934 eassert (XOVERLAY (overlay
)->next
== NULL
);
3936 marker_position (OVERLAY_START (overlay
)),
3937 marker_position (OVERLAY_END (overlay
)));
3938 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3939 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3941 /* When deleting an overlay with before or after strings, turn off
3942 display optimizations for the affected buffer, on the basis that
3943 these strings may contain newlines. This is easier to do than to
3944 check for that situation during redisplay. */
3945 if (!windows_or_buffers_changed
3946 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3947 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3948 b
->prevent_redisplay_optimizations_p
= 1;
3950 return unbind_to (count
, Qnil
);
3953 /* Overlay dissection functions. */
3955 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3956 doc
: /* Return the position at which OVERLAY starts. */)
3957 (Lisp_Object overlay
)
3959 CHECK_OVERLAY (overlay
);
3961 return (Fmarker_position (OVERLAY_START (overlay
)));
3964 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3965 doc
: /* Return the position at which OVERLAY ends. */)
3966 (Lisp_Object overlay
)
3968 CHECK_OVERLAY (overlay
);
3970 return (Fmarker_position (OVERLAY_END (overlay
)));
3973 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3974 doc
: /* Return the buffer OVERLAY belongs to.
3975 Return nil if OVERLAY has been deleted. */)
3976 (Lisp_Object overlay
)
3978 CHECK_OVERLAY (overlay
);
3980 return Fmarker_buffer (OVERLAY_START (overlay
));
3983 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3984 doc
: /* Return a list of the properties on OVERLAY.
3985 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3987 (Lisp_Object overlay
)
3989 CHECK_OVERLAY (overlay
);
3991 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3995 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3996 doc
: /* Return a list of the overlays that contain the character at POS. */)
4000 Lisp_Object
*overlay_vec
;
4004 CHECK_NUMBER_COERCE_MARKER (pos
);
4007 /* We can't use alloca here because overlays_at can call xrealloc. */
4008 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4010 /* Put all the overlays we want in a vector in overlay_vec.
4011 Store the length in len. */
4012 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4013 (EMACS_INT
*) 0, (EMACS_INT
*) 0, 0);
4015 /* Make a list of them all. */
4016 result
= Flist (noverlays
, overlay_vec
);
4018 xfree (overlay_vec
);
4022 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
4023 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
4024 Overlap means that at least one character is contained within the overlay
4025 and also contained within the specified region.
4026 Empty overlays are included in the result if they are located at BEG,
4027 between BEG and END, or at END provided END denotes the position at the
4028 end of the buffer. */)
4029 (Lisp_Object beg
, Lisp_Object end
)
4032 Lisp_Object
*overlay_vec
;
4036 CHECK_NUMBER_COERCE_MARKER (beg
);
4037 CHECK_NUMBER_COERCE_MARKER (end
);
4040 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4042 /* Put all the overlays we want in a vector in overlay_vec.
4043 Store the length in len. */
4044 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
4045 (int *) 0, (int *) 0);
4047 /* Make a list of them all. */
4048 result
= Flist (noverlays
, overlay_vec
);
4050 xfree (overlay_vec
);
4054 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
4056 doc
: /* Return the next position after POS where an overlay starts or ends.
4057 If there are no overlay boundaries from POS to (point-max),
4058 the value is (point-max). */)
4063 Lisp_Object
*overlay_vec
;
4067 CHECK_NUMBER_COERCE_MARKER (pos
);
4070 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4072 /* Put all the overlays we want in a vector in overlay_vec.
4073 Store the length in len.
4074 endpos gets the position where the next overlay starts. */
4075 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4076 &endpos
, (EMACS_INT
*) 0, 1);
4078 /* If any of these overlays ends before endpos,
4079 use its ending point instead. */
4080 for (i
= 0; i
< noverlays
; i
++)
4085 oend
= OVERLAY_END (overlay_vec
[i
]);
4086 oendpos
= OVERLAY_POSITION (oend
);
4087 if (oendpos
< endpos
)
4091 xfree (overlay_vec
);
4092 return make_number (endpos
);
4095 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
4096 Sprevious_overlay_change
, 1, 1, 0,
4097 doc
: /* Return the previous position before POS where an overlay starts or ends.
4098 If there are no overlay boundaries from (point-min) to POS,
4099 the value is (point-min). */)
4104 Lisp_Object
*overlay_vec
;
4107 CHECK_NUMBER_COERCE_MARKER (pos
);
4109 /* At beginning of buffer, we know the answer;
4110 avoid bug subtracting 1 below. */
4111 if (XINT (pos
) == BEGV
)
4115 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4117 /* Put all the overlays we want in a vector in overlay_vec.
4118 Store the length in len.
4119 prevpos gets the position of the previous change. */
4120 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4121 (EMACS_INT
*) 0, &prevpos
, 1);
4123 xfree (overlay_vec
);
4124 return make_number (prevpos
);
4127 /* These functions are for debugging overlays. */
4129 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4130 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4131 The car has all the overlays before the overlay center;
4132 the cdr has all the overlays after the overlay center.
4133 Recentering overlays moves overlays between these lists.
4134 The lists you get are copies, so that changing them has no effect.
4135 However, the overlays you get are the real objects that the buffer uses. */)
4138 struct Lisp_Overlay
*ol
;
4139 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4140 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4143 before
= Fcons (tmp
, before
);
4145 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4148 after
= Fcons (tmp
, after
);
4150 return Fcons (Fnreverse (before
), Fnreverse (after
));
4153 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4154 doc
: /* Recenter the overlays of the current buffer around position POS.
4155 That makes overlay lookup faster for positions near POS (but perhaps slower
4156 for positions far away from POS). */)
4159 CHECK_NUMBER_COERCE_MARKER (pos
);
4161 recenter_overlay_lists (current_buffer
, XINT (pos
));
4165 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4166 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4167 (Lisp_Object overlay
, Lisp_Object prop
)
4169 CHECK_OVERLAY (overlay
);
4170 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4173 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4174 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4175 (Lisp_Object overlay
, Lisp_Object prop
, Lisp_Object value
)
4177 Lisp_Object tail
, buffer
;
4180 CHECK_OVERLAY (overlay
);
4182 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4184 for (tail
= XOVERLAY (overlay
)->plist
;
4185 CONSP (tail
) && CONSP (XCDR (tail
));
4186 tail
= XCDR (XCDR (tail
)))
4187 if (EQ (XCAR (tail
), prop
))
4189 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4190 XSETCAR (XCDR (tail
), value
);
4193 /* It wasn't in the list, so add it to the front. */
4194 changed
= !NILP (value
);
4195 XOVERLAY (overlay
)->plist
4196 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4198 if (! NILP (buffer
))
4201 modify_overlay (XBUFFER (buffer
),
4202 marker_position (OVERLAY_START (overlay
)),
4203 marker_position (OVERLAY_END (overlay
)));
4204 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4205 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4206 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4207 Fdelete_overlay (overlay
);
4213 /* Subroutine of report_overlay_modification. */
4215 /* Lisp vector holding overlay hook functions to call.
4216 Vector elements come in pairs.
4217 Each even-index element is a list of hook functions.
4218 The following odd-index element is the overlay they came from.
4220 Before the buffer change, we fill in this vector
4221 as we call overlay hook functions.
4222 After the buffer change, we get the functions to call from this vector.
4223 This way we always call the same functions before and after the change. */
4224 static Lisp_Object last_overlay_modification_hooks
;
4226 /* Number of elements actually used in last_overlay_modification_hooks. */
4227 static int last_overlay_modification_hooks_used
;
4229 /* Add one functionlist/overlay pair
4230 to the end of last_overlay_modification_hooks. */
4233 add_overlay_mod_hooklist (Lisp_Object functionlist
, Lisp_Object overlay
)
4235 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4237 if (last_overlay_modification_hooks_used
== oldsize
)
4238 last_overlay_modification_hooks
= larger_vector
4239 (last_overlay_modification_hooks
, oldsize
* 2, Qnil
);
4240 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4241 functionlist
); last_overlay_modification_hooks_used
++;
4242 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4243 overlay
); last_overlay_modification_hooks_used
++;
4246 /* Run the modification-hooks of overlays that include
4247 any part of the text in START to END.
4248 If this change is an insertion, also
4249 run the insert-before-hooks of overlay starting at END,
4250 and the insert-after-hooks of overlay ending at START.
4252 This is called both before and after the modification.
4253 AFTER is nonzero when we call after the modification.
4255 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4256 When AFTER is nonzero, they are the start position,
4257 the position after the inserted new text,
4258 and the length of deleted or replaced old text. */
4261 report_overlay_modification (Lisp_Object start
, Lisp_Object end
, int after
,
4262 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4264 Lisp_Object prop
, overlay
;
4265 struct Lisp_Overlay
*tail
;
4266 /* 1 if this change is an insertion. */
4267 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4268 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4273 /* We used to run the functions as soon as we found them and only register
4274 them in last_overlay_modification_hooks for the purpose of the `after'
4275 case. But running elisp code as we traverse the list of overlays is
4276 painful because the list can be modified by the elisp code so we had to
4277 copy at several places. We now simply do a read-only traversal that
4278 only collects the functions to run and we run them afterwards. It's
4279 simpler, especially since all the code was already there. -stef */
4283 /* We are being called before a change.
4284 Scan the overlays to find the functions to call. */
4285 last_overlay_modification_hooks_used
= 0;
4286 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4288 int startpos
, endpos
;
4289 Lisp_Object ostart
, oend
;
4291 XSETMISC (overlay
, tail
);
4293 ostart
= OVERLAY_START (overlay
);
4294 oend
= OVERLAY_END (overlay
);
4295 endpos
= OVERLAY_POSITION (oend
);
4296 if (XFASTINT (start
) > endpos
)
4298 startpos
= OVERLAY_POSITION (ostart
);
4299 if (insertion
&& (XFASTINT (start
) == startpos
4300 || XFASTINT (end
) == startpos
))
4302 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4304 add_overlay_mod_hooklist (prop
, overlay
);
4306 if (insertion
&& (XFASTINT (start
) == endpos
4307 || XFASTINT (end
) == endpos
))
4309 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4311 add_overlay_mod_hooklist (prop
, overlay
);
4313 /* Test for intersecting intervals. This does the right thing
4314 for both insertion and deletion. */
4315 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4317 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4319 add_overlay_mod_hooklist (prop
, overlay
);
4323 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4325 int startpos
, endpos
;
4326 Lisp_Object ostart
, oend
;
4328 XSETMISC (overlay
, tail
);
4330 ostart
= OVERLAY_START (overlay
);
4331 oend
= OVERLAY_END (overlay
);
4332 startpos
= OVERLAY_POSITION (ostart
);
4333 endpos
= OVERLAY_POSITION (oend
);
4334 if (XFASTINT (end
) < startpos
)
4336 if (insertion
&& (XFASTINT (start
) == startpos
4337 || XFASTINT (end
) == startpos
))
4339 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4341 add_overlay_mod_hooklist (prop
, overlay
);
4343 if (insertion
&& (XFASTINT (start
) == endpos
4344 || XFASTINT (end
) == endpos
))
4346 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4348 add_overlay_mod_hooklist (prop
, overlay
);
4350 /* Test for intersecting intervals. This does the right thing
4351 for both insertion and deletion. */
4352 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4354 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4356 add_overlay_mod_hooklist (prop
, overlay
);
4361 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4363 /* Call the functions recorded in last_overlay_modification_hooks.
4364 First copy the vector contents, in case some of these hooks
4365 do subsequent modification of the buffer. */
4366 int size
= last_overlay_modification_hooks_used
;
4367 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4370 memcpy (copy
, XVECTOR (last_overlay_modification_hooks
)->contents
,
4371 size
* sizeof (Lisp_Object
));
4373 gcpro1
.nvars
= size
;
4375 for (i
= 0; i
< size
;)
4377 Lisp_Object prop
, overlay
;
4379 overlay
= copy
[i
++];
4380 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4387 call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
, int after
,
4388 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4390 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4392 GCPRO4 (list
, arg1
, arg2
, arg3
);
4394 while (CONSP (list
))
4397 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4399 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4405 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4408 evaporate_overlays (EMACS_INT pos
)
4410 Lisp_Object overlay
, hit_list
;
4411 struct Lisp_Overlay
*tail
;
4414 if (pos
<= current_buffer
->overlay_center
)
4415 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4418 XSETMISC (overlay
, tail
);
4419 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4422 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4423 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4424 hit_list
= Fcons (overlay
, hit_list
);
4427 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4430 XSETMISC (overlay
, tail
);
4431 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4434 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4435 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4436 hit_list
= Fcons (overlay
, hit_list
);
4438 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4439 Fdelete_overlay (XCAR (hit_list
));
4442 /* Somebody has tried to store a value with an unacceptable type
4443 in the slot with offset OFFSET. */
4446 buffer_slot_type_mismatch (Lisp_Object newval
, int type
)
4448 Lisp_Object predicate
;
4452 case_Lisp_Int
: predicate
= Qintegerp
; break;
4453 case Lisp_String
: predicate
= Qstringp
; break;
4454 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4458 wrong_type_argument (predicate
, newval
);
4462 /***********************************************************************
4463 Allocation with mmap
4464 ***********************************************************************/
4466 #ifdef USE_MMAP_FOR_BUFFERS
4468 #include <sys/types.h>
4469 #include <sys/mman.h>
4472 #ifdef MAP_ANONYMOUS
4473 #define MAP_ANON MAP_ANONYMOUS
4480 #define MAP_FAILED ((void *) -1)
4492 /* Memory is allocated in regions which are mapped using mmap(2).
4493 The current implementation lets the system select mapped
4494 addresses; we're not using MAP_FIXED in general, except when
4495 trying to enlarge regions.
4497 Each mapped region starts with a mmap_region structure, the user
4498 area starts after that structure, aligned to MEM_ALIGN.
4500 +-----------------------+
4501 | struct mmap_info + |
4503 +-----------------------+
4507 +-----------------------+ */
4511 /* User-specified size. */
4512 size_t nbytes_specified
;
4514 /* Number of bytes mapped */
4515 size_t nbytes_mapped
;
4517 /* Pointer to the location holding the address of the memory
4518 allocated with the mmap'd block. The variable actually points
4519 after this structure. */
4522 /* Next and previous in list of all mmap'd regions. */
4523 struct mmap_region
*next
, *prev
;
4526 /* Doubly-linked list of mmap'd regions. */
4528 static struct mmap_region
*mmap_regions
;
4530 /* File descriptor for mmap. If we don't have anonymous mapping,
4531 /dev/zero will be opened on it. */
4535 /* Temporary storage for mmap_set_vars, see there. */
4537 static struct mmap_region
*mmap_regions_1
;
4538 static int mmap_fd_1
;
4540 /* Page size on this system. */
4542 static int mmap_page_size
;
4544 /* 1 means mmap has been intialized. */
4546 static int mmap_initialized_p
;
4548 /* Value is X rounded up to the next multiple of N. */
4550 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4552 /* Size of mmap_region structure plus padding. */
4554 #define MMAP_REGION_STRUCT_SIZE \
4555 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4557 /* Given a pointer P to the start of the user-visible part of a mapped
4558 region, return a pointer to the start of the region. */
4560 #define MMAP_REGION(P) \
4561 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4563 /* Given a pointer P to the start of a mapped region, return a pointer
4564 to the start of the user-visible part of the region. */
4566 #define MMAP_USER_AREA(P) \
4567 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4569 #define MEM_ALIGN sizeof (double)
4571 /* Predicate returning true if part of the address range [START .. END]
4572 is currently mapped. Used to prevent overwriting an existing
4575 Default is to conservativly assume the address range is occupied by
4576 something else. This can be overridden by system configuration
4577 files if system-specific means to determine this exists. */
4579 #ifndef MMAP_ALLOCATED_P
4580 #define MMAP_ALLOCATED_P(start, end) 1
4583 /* Function prototypes. */
4585 static int mmap_free_1 (struct mmap_region
*);
4586 static int mmap_enlarge (struct mmap_region
*, int);
4587 static struct mmap_region
*mmap_find (POINTER_TYPE
*, POINTER_TYPE
*);
4588 static POINTER_TYPE
*mmap_alloc (POINTER_TYPE
**, size_t);
4589 static POINTER_TYPE
*mmap_realloc (POINTER_TYPE
**, size_t);
4590 static void mmap_free (POINTER_TYPE
**ptr
);
4591 static void mmap_init (void);
4594 /* Return a region overlapping address range START...END, or null if
4595 none. END is not including, i.e. the last byte in the range
4598 static struct mmap_region
*
4599 mmap_find (start
, end
)
4600 POINTER_TYPE
*start
, *end
;
4602 struct mmap_region
*r
;
4603 char *s
= (char *) start
, *e
= (char *) end
;
4605 for (r
= mmap_regions
; r
; r
= r
->next
)
4607 char *rstart
= (char *) r
;
4608 char *rend
= rstart
+ r
->nbytes_mapped
;
4610 if (/* First byte of range, i.e. START, in this region? */
4611 (s
>= rstart
&& s
< rend
)
4612 /* Last byte of range, i.e. END - 1, in this region? */
4613 || (e
> rstart
&& e
<= rend
)
4614 /* First byte of this region in the range? */
4615 || (rstart
>= s
&& rstart
< e
)
4616 /* Last byte of this region in the range? */
4617 || (rend
> s
&& rend
<= e
))
4625 /* Unmap a region. P is a pointer to the start of the user-araa of
4626 the region. Value is non-zero if successful. */
4630 struct mmap_region
*r
;
4633 r
->next
->prev
= r
->prev
;
4635 r
->prev
->next
= r
->next
;
4637 mmap_regions
= r
->next
;
4639 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4641 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4649 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4650 Value is non-zero if successful. */
4653 mmap_enlarge (r
, npages
)
4654 struct mmap_region
*r
;
4657 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4663 /* Unmap pages at the end of the region. */
4664 nbytes
= - npages
* mmap_page_size
;
4665 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4666 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4669 r
->nbytes_mapped
-= nbytes
;
4673 else if (npages
> 0)
4675 nbytes
= npages
* mmap_page_size
;
4677 /* Try to map additional pages at the end of the region. We
4678 cannot do this if the address range is already occupied by
4679 something else because mmap deletes any previous mapping.
4680 I'm not sure this is worth doing, let's see. */
4681 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4685 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4686 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4687 if (p
== MAP_FAILED
)
4688 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4689 else if (p
!= (POINTER_TYPE
*) region_end
)
4691 /* Kernels are free to choose a different address. In
4692 that case, unmap what we've mapped above; we have
4694 if (munmap (p
, nbytes
) == -1)
4695 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4699 r
->nbytes_mapped
+= nbytes
;
4709 /* Set or reset variables holding references to mapped regions. If
4710 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4711 non-zero, set all variables to the start of the user-areas
4714 This function is called from Fdump_emacs to ensure that the dumped
4715 Emacs doesn't contain references to memory that won't be mapped
4716 when Emacs starts. */
4719 mmap_set_vars (restore_p
)
4722 struct mmap_region
*r
;
4726 mmap_regions
= mmap_regions_1
;
4727 mmap_fd
= mmap_fd_1
;
4728 for (r
= mmap_regions
; r
; r
= r
->next
)
4729 *r
->var
= MMAP_USER_AREA (r
);
4733 for (r
= mmap_regions
; r
; r
= r
->next
)
4735 mmap_regions_1
= mmap_regions
;
4736 mmap_regions
= NULL
;
4737 mmap_fd_1
= mmap_fd
;
4743 /* Allocate a block of storage large enough to hold NBYTES bytes of
4744 data. A pointer to the data is returned in *VAR. VAR is thus the
4745 address of some variable which will use the data area.
4747 The allocation of 0 bytes is valid.
4749 If we can't allocate the necessary memory, set *VAR to null, and
4752 static POINTER_TYPE
*
4753 mmap_alloc (var
, nbytes
)
4762 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4763 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4766 if (p
== MAP_FAILED
)
4768 if (errno
!= ENOMEM
)
4769 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4774 struct mmap_region
*r
= (struct mmap_region
*) p
;
4776 r
->nbytes_specified
= nbytes
;
4777 r
->nbytes_mapped
= map
;
4780 r
->next
= mmap_regions
;
4785 p
= MMAP_USER_AREA (p
);
4792 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4793 resize it to size NBYTES. Change *VAR to reflect the new block,
4794 and return this value. If more memory cannot be allocated, then
4795 leave *VAR unchanged, and return null. */
4797 static POINTER_TYPE
*
4798 mmap_realloc (var
, nbytes
)
4802 POINTER_TYPE
*result
;
4807 result
= mmap_alloc (var
, nbytes
);
4808 else if (nbytes
== 0)
4811 result
= mmap_alloc (var
, nbytes
);
4815 struct mmap_region
*r
= MMAP_REGION (*var
);
4816 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4821 POINTER_TYPE
*old_ptr
= *var
;
4823 /* Try to map additional pages at the end of the region.
4824 If that fails, allocate a new region, copy data
4825 from the old region, then free it. */
4826 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4829 r
->nbytes_specified
= nbytes
;
4830 *var
= result
= old_ptr
;
4832 else if (mmap_alloc (var
, nbytes
))
4834 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4835 mmap_free_1 (MMAP_REGION (old_ptr
));
4837 r
= MMAP_REGION (result
);
4838 r
->nbytes_specified
= nbytes
;
4846 else if (room
- nbytes
>= mmap_page_size
)
4848 /* Shrinking by at least a page. Let's give some
4849 memory back to the system.
4851 The extra parens are to make the division happens first,
4852 on positive values, so we know it will round towards
4854 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4856 r
->nbytes_specified
= nbytes
;
4860 /* Leave it alone. */
4862 r
->nbytes_specified
= nbytes
;
4870 /* Free a block of relocatable storage whose data is pointed to by
4871 PTR. Store 0 in *PTR to show there's no block allocated. */
4881 mmap_free_1 (MMAP_REGION (*var
));
4887 /* Perform necessary intializations for the use of mmap. */
4893 /* The value of mmap_fd is initially 0 in temacs, and -1
4894 in a dumped Emacs. */
4897 /* No anonymous mmap -- we need the file descriptor. */
4898 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4900 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4902 #endif /* MAP_ANON == 0 */
4904 if (mmap_initialized_p
)
4906 mmap_initialized_p
= 1;
4912 mmap_page_size
= getpagesize ();
4915 #endif /* USE_MMAP_FOR_BUFFERS */
4919 /***********************************************************************
4920 Buffer-text Allocation
4921 ***********************************************************************/
4924 extern POINTER_TYPE
*r_alloc (POINTER_TYPE
**, size_t);
4925 extern POINTER_TYPE
*r_re_alloc (POINTER_TYPE
**, size_t);
4926 extern void r_alloc_free (POINTER_TYPE
**ptr
);
4927 #endif /* REL_ALLOC */
4930 /* Allocate NBYTES bytes for buffer B's text buffer. */
4933 alloc_buffer_text (struct buffer
*b
, size_t nbytes
)
4938 #if defined USE_MMAP_FOR_BUFFERS
4939 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4940 #elif defined REL_ALLOC
4941 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4943 p
= xmalloc (nbytes
);
4952 b
->text
->beg
= (unsigned char *) p
;
4956 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4960 enlarge_buffer_text (struct buffer
*b
, EMACS_INT delta
)
4963 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4966 #if defined USE_MMAP_FOR_BUFFERS
4967 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4968 #elif defined REL_ALLOC
4969 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4971 p
= xrealloc (b
->text
->beg
, nbytes
);
4980 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4985 /* Free buffer B's text buffer. */
4988 free_buffer_text (struct buffer
*b
)
4992 #if defined USE_MMAP_FOR_BUFFERS
4993 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4994 #elif defined REL_ALLOC
4995 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4997 xfree (b
->text
->beg
);
5000 BUF_BEG_ADDR (b
) = NULL
;
5006 /***********************************************************************
5008 ***********************************************************************/
5011 init_buffer_once (void)
5015 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
5017 /* Make sure all markable slots in buffer_defaults
5018 are initialized reasonably, so mark_buffer won't choke. */
5019 reset_buffer (&buffer_defaults
);
5020 eassert (EQ (buffer_defaults
.name
, make_number (0)));
5021 reset_buffer_local_variables (&buffer_defaults
, 1);
5022 eassert (EQ (buffer_local_symbols
.name
, make_number (0)));
5023 reset_buffer (&buffer_local_symbols
);
5024 reset_buffer_local_variables (&buffer_local_symbols
, 1);
5025 /* Prevent GC from getting confused. */
5026 buffer_defaults
.text
= &buffer_defaults
.own_text
;
5027 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
5028 BUF_INTERVALS (&buffer_defaults
) = 0;
5029 BUF_INTERVALS (&buffer_local_symbols
) = 0;
5030 XSETPVECTYPE (&buffer_defaults
, PVEC_BUFFER
);
5031 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
5032 XSETPVECTYPE (&buffer_local_symbols
, PVEC_BUFFER
);
5033 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
5035 /* Set up the default values of various buffer slots. */
5036 /* Must do these before making the first buffer! */
5038 /* real setup is done in bindings.el */
5039 buffer_defaults
.mode_line_format
= make_pure_c_string ("%-");
5040 buffer_defaults
.header_line_format
= Qnil
;
5041 buffer_defaults
.abbrev_mode
= Qnil
;
5042 buffer_defaults
.overwrite_mode
= Qnil
;
5043 buffer_defaults
.case_fold_search
= Qt
;
5044 buffer_defaults
.auto_fill_function
= Qnil
;
5045 buffer_defaults
.selective_display
= Qnil
;
5047 buffer_defaults
.selective_display_ellipses
= Qt
;
5049 buffer_defaults
.abbrev_table
= Qnil
;
5050 buffer_defaults
.display_table
= Qnil
;
5051 buffer_defaults
.undo_list
= Qnil
;
5052 buffer_defaults
.mark_active
= Qnil
;
5053 buffer_defaults
.file_format
= Qnil
;
5054 buffer_defaults
.auto_save_file_format
= Qt
;
5055 buffer_defaults
.overlays_before
= NULL
;
5056 buffer_defaults
.overlays_after
= NULL
;
5057 buffer_defaults
.overlay_center
= BEG
;
5059 XSETFASTINT (buffer_defaults
.tab_width
, 8);
5060 buffer_defaults
.truncate_lines
= Qnil
;
5061 buffer_defaults
.word_wrap
= Qnil
;
5062 buffer_defaults
.ctl_arrow
= Qt
;
5063 buffer_defaults
.bidi_display_reordering
= Qnil
;
5064 buffer_defaults
.bidi_paragraph_direction
= Qnil
;
5065 buffer_defaults
.cursor_type
= Qt
;
5066 buffer_defaults
.extra_line_spacing
= Qnil
;
5067 buffer_defaults
.cursor_in_non_selected_windows
= Qt
;
5070 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
5072 buffer_defaults
.enable_multibyte_characters
= Qt
;
5073 buffer_defaults
.buffer_file_coding_system
= Qnil
;
5074 XSETFASTINT (buffer_defaults
.fill_column
, 70);
5075 XSETFASTINT (buffer_defaults
.left_margin
, 0);
5076 buffer_defaults
.cache_long_line_scans
= Qnil
;
5077 buffer_defaults
.file_truename
= Qnil
;
5078 XSETFASTINT (buffer_defaults
.display_count
, 0);
5079 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
5080 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
5081 buffer_defaults
.left_fringe_width
= Qnil
;
5082 buffer_defaults
.right_fringe_width
= Qnil
;
5083 buffer_defaults
.fringes_outside_margins
= Qnil
;
5084 buffer_defaults
.scroll_bar_width
= Qnil
;
5085 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
5086 buffer_defaults
.indicate_empty_lines
= Qnil
;
5087 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
5088 buffer_defaults
.fringe_indicator_alist
= Qnil
;
5089 buffer_defaults
.fringe_cursor_alist
= Qnil
;
5090 buffer_defaults
.scroll_up_aggressively
= Qnil
;
5091 buffer_defaults
.scroll_down_aggressively
= Qnil
;
5092 buffer_defaults
.display_time
= Qnil
;
5094 /* Assign the local-flags to the slots that have default values.
5095 The local flag is a bit that is used in the buffer
5096 to say that it has its own local value for the slot.
5097 The local flag bits are in the local_var_flags slot of the buffer. */
5099 /* Nothing can work if this isn't true */
5100 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
5102 /* 0 means not a lisp var, -1 means always local, else mask */
5103 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
5104 XSETINT (buffer_local_flags
.filename
, -1);
5105 XSETINT (buffer_local_flags
.directory
, -1);
5106 XSETINT (buffer_local_flags
.backed_up
, -1);
5107 XSETINT (buffer_local_flags
.save_length
, -1);
5108 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
5109 XSETINT (buffer_local_flags
.read_only
, -1);
5110 XSETINT (buffer_local_flags
.major_mode
, -1);
5111 XSETINT (buffer_local_flags
.mode_name
, -1);
5112 XSETINT (buffer_local_flags
.undo_list
, -1);
5113 XSETINT (buffer_local_flags
.mark_active
, -1);
5114 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
5115 XSETINT (buffer_local_flags
.file_truename
, -1);
5116 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
5117 XSETINT (buffer_local_flags
.file_format
, -1);
5118 XSETINT (buffer_local_flags
.auto_save_file_format
, -1);
5119 XSETINT (buffer_local_flags
.display_count
, -1);
5120 XSETINT (buffer_local_flags
.display_time
, -1);
5121 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
5124 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
5125 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
5126 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5127 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5128 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5129 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5131 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5133 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5134 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5135 XSETFASTINT (buffer_local_flags
.word_wrap
, idx
); ++idx
;
5136 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5137 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5138 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5139 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5140 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5142 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5143 /* Make this one a permanent local. */
5144 buffer_permanent_local_flags
[idx
++] = 1;
5146 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5147 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5148 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5149 XSETFASTINT (buffer_local_flags
.bidi_display_reordering
, idx
); ++idx
;
5150 XSETFASTINT (buffer_local_flags
.bidi_paragraph_direction
, idx
); ++idx
;
5151 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5152 /* Make this one a permanent local. */
5153 buffer_permanent_local_flags
[idx
++] = 1;
5154 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5155 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5156 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5157 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5158 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5159 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5160 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5161 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5162 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5163 XSETFASTINT (buffer_local_flags
.fringe_indicator_alist
, idx
); ++idx
;
5164 XSETFASTINT (buffer_local_flags
.fringe_cursor_alist
, idx
); ++idx
;
5165 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5166 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5167 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5168 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5169 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5170 XSETFASTINT (buffer_local_flags
.cursor_in_non_selected_windows
, idx
); ++idx
;
5172 /* Need more room? */
5173 if (idx
>= MAX_PER_BUFFER_VARS
)
5175 last_per_buffer_idx
= idx
;
5177 Vbuffer_alist
= Qnil
;
5181 QSFundamental
= make_pure_c_string ("Fundamental");
5183 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5184 buffer_defaults
.major_mode
= Qfundamental_mode
;
5186 Qmode_class
= intern_c_string ("mode-class");
5188 Qprotected_field
= intern_c_string ("protected-field");
5190 Qpermanent_local
= intern_c_string ("permanent-local");
5192 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5193 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5195 Qucs_set_table_for_input
= intern_c_string ("ucs-set-table-for-input");
5197 /* super-magic invisible buffer */
5198 Vprin1_to_string_buffer
= Fget_buffer_create (make_pure_c_string (" prin1"));
5199 Vbuffer_alist
= Qnil
;
5201 Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*")));
5203 inhibit_modification_hooks
= 0;
5213 #ifdef USE_MMAP_FOR_BUFFERS
5215 /* When using the ralloc implementation based on mmap(2), buffer
5216 text pointers will have been set to null in the dumped Emacs.
5220 for (b
= all_buffers
; b
; b
= b
->next
)
5221 if (b
->text
->beg
== NULL
)
5222 enlarge_buffer_text (b
, 0);
5224 #endif /* USE_MMAP_FOR_BUFFERS */
5226 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5227 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5228 Fset_buffer_multibyte (Qnil
);
5230 pwd
= get_current_dir_name ();
5233 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5235 /* Maybe this should really use some standard subroutine
5236 whose definition is filename syntax dependent. */
5238 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5240 /* Grow buffer to add directory separator and '\0'. */
5241 pwd
= (char *) realloc (pwd
, len
+ 2);
5243 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5244 pwd
[len
] = DIRECTORY_SEP
;
5245 pwd
[len
+ 1] = '\0';
5248 current_buffer
->directory
= make_unibyte_string (pwd
, strlen (pwd
));
5249 if (! NILP (buffer_defaults
.enable_multibyte_characters
))
5250 /* At this moment, we still don't know how to decode the
5251 directory name. So, we keep the bytes in multibyte form so
5252 that ENCODE_FILE correctly gets the original bytes. */
5253 current_buffer
->directory
5254 = string_to_multibyte (current_buffer
->directory
);
5256 /* Add /: to the front of the name
5257 if it would otherwise be treated as magic. */
5258 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5260 /* If the default dir is just /, TEMP is non-nil
5261 because of the ange-ftp completion handler.
5262 However, it is not necessary to turn / into /:/.
5263 So avoid doing that. */
5264 && strcmp ("/", SDATA (current_buffer
->directory
)))
5265 current_buffer
->directory
5266 = concat2 (build_string ("/:"), current_buffer
->directory
);
5268 temp
= get_minibuffer (0);
5269 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5274 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5275 Object stored in the current buffer. address is the address of the slot
5276 in the buffer that is current now. */
5278 /* TYPE is nil for a general Lisp variable.
5279 An integer specifies a type; then only Lisp values
5280 with that type code are allowed (except that nil is allowed too).
5281 LNAME is the Lisp-level variable name.
5282 VNAME is the name of the buffer slot.
5283 DOC is a dummy where you write the doc string as a comment. */
5284 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5286 static struct Lisp_Buffer_Objfwd bo_fwd; \
5287 defvar_per_buffer (&bo_fwd, lname, vname, type, 0); \
5291 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, char *namestring
,
5292 Lisp_Object
*address
, Lisp_Object type
, char *doc
)
5294 struct Lisp_Symbol
*sym
;
5297 sym
= XSYMBOL (intern (namestring
));
5298 offset
= (char *)address
- (char *)current_buffer
;
5300 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5301 bo_fwd
->offset
= offset
;
5302 bo_fwd
->slottype
= type
;
5303 sym
->redirect
= SYMBOL_FORWARDED
;
5305 /* I tried to do the job without a cast, but it seems impossible.
5306 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5307 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5309 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5311 if (PER_BUFFER_IDX (offset
) == 0)
5312 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5313 slot of buffer_local_flags */
5318 /* initialize the buffer routines */
5320 syms_of_buffer (void)
5322 staticpro (&last_overlay_modification_hooks
);
5323 last_overlay_modification_hooks
5324 = Fmake_vector (make_number (10), Qnil
);
5326 staticpro (&Vbuffer_defaults
);
5327 staticpro (&Vbuffer_local_symbols
);
5328 staticpro (&Qfundamental_mode
);
5329 staticpro (&Qmode_class
);
5330 staticpro (&QSFundamental
);
5331 staticpro (&Vbuffer_alist
);
5332 staticpro (&Qprotected_field
);
5333 staticpro (&Qpermanent_local
);
5334 Qpermanent_local_hook
= intern_c_string ("permanent-local-hook");
5335 staticpro (&Qpermanent_local_hook
);
5336 staticpro (&Qkill_buffer_hook
);
5337 Qoverlayp
= intern_c_string ("overlayp");
5338 staticpro (&Qoverlayp
);
5339 Qevaporate
= intern_c_string ("evaporate");
5340 staticpro (&Qevaporate
);
5341 Qmodification_hooks
= intern_c_string ("modification-hooks");
5342 staticpro (&Qmodification_hooks
);
5343 Qinsert_in_front_hooks
= intern_c_string ("insert-in-front-hooks");
5344 staticpro (&Qinsert_in_front_hooks
);
5345 Qinsert_behind_hooks
= intern_c_string ("insert-behind-hooks");
5346 staticpro (&Qinsert_behind_hooks
);
5347 Qget_file_buffer
= intern_c_string ("get-file-buffer");
5348 staticpro (&Qget_file_buffer
);
5349 Qpriority
= intern_c_string ("priority");
5350 staticpro (&Qpriority
);
5351 Qwindow
= intern_c_string ("window");
5352 staticpro (&Qwindow
);
5353 Qbefore_string
= intern_c_string ("before-string");
5354 staticpro (&Qbefore_string
);
5355 Qafter_string
= intern_c_string ("after-string");
5356 staticpro (&Qafter_string
);
5357 Qfirst_change_hook
= intern_c_string ("first-change-hook");
5358 staticpro (&Qfirst_change_hook
);
5359 Qbefore_change_functions
= intern_c_string ("before-change-functions");
5360 staticpro (&Qbefore_change_functions
);
5361 Qafter_change_functions
= intern_c_string ("after-change-functions");
5362 staticpro (&Qafter_change_functions
);
5363 /* The next one is initialized in init_buffer_once. */
5364 staticpro (&Qucs_set_table_for_input
);
5366 Qkill_buffer_query_functions
= intern_c_string ("kill-buffer-query-functions");
5367 staticpro (&Qkill_buffer_query_functions
);
5369 Fput (Qprotected_field
, Qerror_conditions
,
5370 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5371 Fput (Qprotected_field
, Qerror_message
,
5372 make_pure_c_string ("Attempt to modify a protected field"));
5374 /* All these use DEFVAR_LISP_NOPRO because the slots in
5375 buffer_defaults will all be marked via Vbuffer_defaults. */
5377 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5378 &buffer_defaults
.mode_line_format
,
5379 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5380 This is the same as (default-value 'mode-line-format). */);
5382 DEFVAR_LISP_NOPRO ("default-header-line-format",
5383 &buffer_defaults
.header_line_format
,
5384 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5385 This is the same as (default-value 'header-line-format). */);
5387 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5388 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5389 This is the same as (default-value 'cursor-type). */);
5391 DEFVAR_LISP_NOPRO ("default-line-spacing",
5392 &buffer_defaults
.extra_line_spacing
,
5393 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5394 This is the same as (default-value 'line-spacing). */);
5396 DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows",
5397 &buffer_defaults
.cursor_in_non_selected_windows
,
5398 doc
: /* Default value of `cursor-in-non-selected-windows'.
5399 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5401 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5402 &buffer_defaults
.abbrev_mode
,
5403 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5404 This is the same as (default-value 'abbrev-mode). */);
5406 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5407 &buffer_defaults
.ctl_arrow
,
5408 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5409 This is the same as (default-value 'ctl-arrow). */);
5411 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5412 &buffer_defaults
.enable_multibyte_characters
,
5413 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5414 This is the same as (default-value 'enable-multibyte-characters). */);
5416 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5417 &buffer_defaults
.buffer_file_coding_system
,
5418 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5419 This is the same as (default-value 'buffer-file-coding-system). */);
5421 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5422 &buffer_defaults
.truncate_lines
,
5423 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5424 This is the same as (default-value 'truncate-lines). */);
5426 DEFVAR_LISP_NOPRO ("default-fill-column",
5427 &buffer_defaults
.fill_column
,
5428 doc
: /* Default value of `fill-column' for buffers that do not override it.
5429 This is the same as (default-value 'fill-column). */);
5431 DEFVAR_LISP_NOPRO ("default-left-margin",
5432 &buffer_defaults
.left_margin
,
5433 doc
: /* Default value of `left-margin' for buffers that do not override it.
5434 This is the same as (default-value 'left-margin). */);
5436 DEFVAR_LISP_NOPRO ("default-tab-width",
5437 &buffer_defaults
.tab_width
,
5438 doc
: /* Default value of `tab-width' for buffers that do not override it.
5439 This is the same as (default-value 'tab-width). */);
5441 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5442 &buffer_defaults
.case_fold_search
,
5443 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5444 This is the same as (default-value 'case-fold-search). */);
5447 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5448 &buffer_defaults
.buffer_file_type
,
5449 doc
: /* Default file type for buffers that do not override it.
5450 This is the same as (default-value 'buffer-file-type).
5451 The file type is nil for text, t for binary. */);
5454 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5455 &buffer_defaults
.left_margin_cols
,
5456 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5457 This is the same as (default-value 'left-margin-width). */);
5459 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5460 &buffer_defaults
.right_margin_cols
,
5461 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5462 This is the same as (default-value 'right-margin-width). */);
5464 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5465 &buffer_defaults
.left_fringe_width
,
5466 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5467 This is the same as (default-value 'left-fringe-width). */);
5469 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5470 &buffer_defaults
.right_fringe_width
,
5471 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5472 This is the same as (default-value 'right-fringe-width). */);
5474 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5475 &buffer_defaults
.fringes_outside_margins
,
5476 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5477 This is the same as (default-value 'fringes-outside-margins). */);
5479 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5480 &buffer_defaults
.scroll_bar_width
,
5481 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5482 This is the same as (default-value 'scroll-bar-width). */);
5484 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5485 &buffer_defaults
.vertical_scroll_bar_type
,
5486 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5487 This is the same as (default-value 'vertical-scroll-bar). */);
5489 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5490 &buffer_defaults
.indicate_empty_lines
,
5491 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5492 This is the same as (default-value 'indicate-empty-lines). */);
5494 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5495 &buffer_defaults
.indicate_buffer_boundaries
,
5496 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5497 This is the same as (default-value 'indicate-buffer-boundaries). */);
5499 DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist",
5500 &buffer_defaults
.fringe_indicator_alist
,
5501 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5502 This is the same as (default-value 'fringe-indicator-alist'). */);
5504 DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist",
5505 &buffer_defaults
.fringe_cursor_alist
,
5506 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5507 This is the same as (default-value 'fringe-cursor-alist'). */);
5509 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5510 &buffer_defaults
.scroll_up_aggressively
,
5511 doc
: /* Default value of `scroll-up-aggressively'.
5512 This value applies in buffers that don't have their own local values.
5513 This is the same as (default-value 'scroll-up-aggressively). */);
5515 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5516 &buffer_defaults
.scroll_down_aggressively
,
5517 doc
: /* Default value of `scroll-down-aggressively'.
5518 This value applies in buffers that don't have their own local values.
5519 This is the same as (default-value 'scroll-down-aggressively). */);
5521 DEFVAR_PER_BUFFER ("header-line-format",
5522 ¤t_buffer
->header_line_format
,
5524 doc
: /* Analogous to `mode-line-format', but controls the header line.
5525 The header line appears, optionally, at the top of a window;
5526 the mode line appears at the bottom. */);
5528 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5530 doc
: /* Template for displaying mode line for current buffer.
5531 Each buffer has its own value of this variable.
5532 Value may be nil, a string, a symbol or a list or cons cell.
5533 A value of nil means don't display a mode line.
5534 For a symbol, its value is used (but it is ignored if t or nil).
5535 A string appearing directly as the value of a symbol is processed verbatim
5536 in that the %-constructs below are not recognized.
5537 Note that unless the symbol is marked as a `risky-local-variable', all
5538 properties in any strings, as well as all :eval and :propertize forms
5539 in the value of that symbol will be ignored.
5540 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5541 is used as a mode line element. Be careful--FORM should not load any files,
5542 because that can cause an infinite recursion.
5543 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5544 with the specified properties PROPS applied.
5545 For a list whose car is a symbol, the symbol's value is taken,
5546 and if that is non-nil, the cadr of the list is processed recursively.
5547 Otherwise, the caddr of the list (if there is one) is processed.
5548 For a list whose car is a string or list, each element is processed
5549 recursively and the results are effectively concatenated.
5550 For a list whose car is an integer, the cdr of the list is processed
5551 and padded (if the number is positive) or truncated (if negative)
5552 to the width specified by that number.
5553 A string is printed verbatim in the mode line except for %-constructs:
5554 (%-constructs are allowed when the string is the entire mode-line-format
5555 or when it is found in a cons-cell or a list)
5556 %b -- print buffer name. %f -- print visited file name.
5557 %F -- print frame name.
5558 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5559 %& is like %*, but ignore read-only-ness.
5560 % means buffer is read-only and * means it is modified.
5561 For a modified read-only buffer, %* gives % and %+ gives *.
5562 %s -- print process status. %l -- print the current line number.
5563 %c -- print the current column number (this makes editing slower).
5564 To make the column number update correctly in all cases,
5565 `column-number-mode' must be non-nil.
5566 %i -- print the size of the buffer.
5567 %I -- like %i, but use k, M, G, etc., to abbreviate.
5568 %p -- print percent of buffer above top of window, or Top, Bot or All.
5569 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5570 or print Bottom or All.
5571 %n -- print Narrow if appropriate.
5572 %t -- visited file is text or binary (if OS supports this distinction).
5573 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5574 %Z -- like %z, but including the end-of-line format.
5575 %e -- print error message about full memory.
5576 %@ -- print @ or hyphen. @ means that default-directory is on a
5578 %[ -- print one [ for each recursive editing level. %] similar.
5579 %% -- print %. %- -- print infinitely many dashes.
5580 Decimal digits after the % specify field width to which to pad. */);
5582 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5583 doc
: /* *Value of `major-mode' for new buffers. */);
5585 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5586 make_number (Lisp_Symbol
),
5587 doc
: /* Symbol for current buffer's major mode.
5588 The default value (normally `fundamental-mode') affects new buffers.
5589 A value of nil means to use the current buffer's major mode, provided
5590 it is not marked as "special".
5592 When a mode is used by default, `find-file' switches to it before it
5593 reads the contents into the buffer and before it finishes setting up
5594 the buffer. Thus, the mode and its hooks should not expect certain
5595 variables such as `buffer-read-only' and `buffer-file-coding-system'
5598 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5600 doc
: /* Pretty name of current buffer's major mode.
5601 Usually a string, but can use any of the constructs for `mode-line-format',
5603 Format with `format-mode-line' to produce a string value. */);
5605 DEFVAR_PER_BUFFER ("local-abbrev-table", ¤t_buffer
->abbrev_table
, Qnil
,
5606 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5608 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5609 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5611 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5613 doc
: /* *Non-nil if searches and matches should ignore case. */);
5615 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5616 make_number (LISP_INT_TAG
),
5617 doc
: /* *Column beyond which automatic line-wrapping should happen.
5618 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5620 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5621 make_number (LISP_INT_TAG
),
5622 doc
: /* *Column for the default `indent-line-function' to indent to.
5623 Linefeed indents to this column in Fundamental mode. */);
5625 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5626 make_number (LISP_INT_TAG
),
5627 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5629 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5630 doc
: /* *Non-nil means display control chars with uparrow.
5631 A value of nil means use backslash and octal digits.
5632 This variable does not apply to characters whose display is specified
5633 in the current display table (if there is one). */);
5635 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5636 ¤t_buffer
->enable_multibyte_characters
,
5638 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5639 Otherwise they are regarded as unibyte. This affects the display,
5640 file I/O and the behavior of various editing commands.
5642 This variable is buffer-local but you cannot set it directly;
5643 use the function `set-buffer-multibyte' to change a buffer's representation.
5644 Changing its default value with `setq-default' is supported.
5645 See also variable `default-enable-multibyte-characters' and Info node
5646 `(elisp)Text Representations'. */);
5647 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5649 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5650 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5651 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5652 This variable applies to saving the buffer, and also to `write-region'
5653 and other functions that use `write-region'.
5654 It does not apply to sending output to subprocesses, however.
5656 If this is nil, the buffer is saved without any code conversion
5657 unless some coding system is specified in `file-coding-system-alist'
5658 for the buffer file.
5660 If the text to be saved cannot be encoded as specified by this variable,
5661 an alternative encoding is selected by `select-safe-coding-system', which see.
5663 The variable `coding-system-for-write', if non-nil, overrides this variable.
5665 This variable is never applied to a way of decoding a file while reading it. */);
5667 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5668 ¤t_buffer
->bidi_display_reordering
, Qnil
,
5669 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5671 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5672 ¤t_buffer
->bidi_paragraph_direction
, Qnil
,
5673 doc
: /* *If non-nil, forces directionality of text paragraphs in the buffer.
5675 If this is nil (the default), the direction of each paragraph is
5676 determined by the first strong directional character of its text.
5677 The values of `right-to-left' and `left-to-right' override that.
5678 Any other value is treated as nil.
5680 This variable has no effect unless the buffer's value of
5681 \`bidi-display-reordering' is non-nil. */);
5683 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5684 doc
: /* *Non-nil means do not display continuation lines.
5685 Instead, give each line of text just one screen line.
5687 Note that this is overridden by the variable
5688 `truncate-partial-width-windows' if that variable is non-nil
5689 and this buffer is not full-frame width. */);
5691 DEFVAR_PER_BUFFER ("word-wrap", ¤t_buffer
->word_wrap
, Qnil
,
5692 doc
: /* *Non-nil means to use word-wrapping for continuation lines.
5693 When word-wrapping is on, continuation lines are wrapped at the space
5694 or tab character nearest to the right window edge.
5695 If nil, continuation lines are wrapped at the right screen edge.
5697 This variable has no effect if long lines are truncated (see
5698 `truncate-lines' and `truncate-partial-width-windows'). If you use
5699 word-wrapping, you might want to reduce the value of
5700 `truncate-partial-width-windows', since wrapping can make text readable
5701 in narrower windows. */);
5704 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5706 doc
: /* Non-nil if the visited file is a binary file.
5707 This variable is meaningful on MS-DOG and Windows NT.
5708 On those systems, it is automatically local in every buffer.
5709 On other systems, this variable is normally always nil. */);
5712 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5713 make_number (Lisp_String
),
5714 doc
: /* Name of default directory of current buffer. Should end with slash.
5715 To interactively change the default directory, use command `cd'. */);
5717 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5719 doc
: /* Function called (if non-nil) to perform auto-fill.
5720 It is called after self-inserting any character specified in
5721 the `auto-fill-chars' table.
5722 NOTE: This variable is not a hook;
5723 its value may not be a list of functions. */);
5725 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5726 make_number (Lisp_String
),
5727 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5729 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5730 make_number (Lisp_String
),
5731 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5732 The truename of a file is calculated by `file-truename'
5733 and then abbreviated with `abbreviate-file-name'. */);
5735 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5736 ¤t_buffer
->auto_save_file_name
,
5737 make_number (Lisp_String
),
5738 doc
: /* Name of file for auto-saving current buffer.
5739 If it is nil, that means don't auto-save this buffer. */);
5741 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5742 doc
: /* Non-nil if this buffer is read-only. */);
5744 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5745 doc
: /* Non-nil if this buffer's file has been backed up.
5746 Backing up is done before the first time the file is saved. */);
5748 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5749 make_number (LISP_INT_TAG
),
5750 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5752 -1 means auto-saving turned off until next real save.
5754 If you set this to -2, that means don't turn off auto-saving in this buffer
5755 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5756 you probably should set this to -2 in that buffer. */);
5758 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5760 doc
: /* Non-nil enables selective display.
5761 An integer N as value means display only lines
5762 that start with less than N columns of space.
5763 A value of t means that the character ^M makes itself and
5764 all the rest of the line invisible; also, when saving the buffer
5765 in a file, save the ^M as a newline. */);
5768 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5769 ¤t_buffer
->selective_display_ellipses
,
5771 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5774 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5775 doc
: /* Non-nil if self-insertion should replace existing text.
5776 The value should be one of `overwrite-mode-textual',
5777 `overwrite-mode-binary', or nil.
5778 If it is `overwrite-mode-textual', self-insertion still
5779 inserts at the end of a line, and inserts when point is before a tab,
5780 until the tab is filled in.
5781 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5783 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5785 doc
: /* Display table that controls display of the contents of current buffer.
5787 If this variable is nil, the value of `standard-display-table' is used.
5788 Each window can have its own, overriding display table, see
5789 `set-window-display-table' and `window-display-table'.
5791 The display table is a char-table created with `make-display-table'.
5792 A char-table is an array indexed by character codes. Normal array
5793 primitives `aref' and `aset' can be used to access elements of a char-table.
5795 Each of the char-table elements control how to display the corresponding
5796 text character: the element at index C in the table says how to display
5797 the character whose code is C. Each element should be a vector of
5798 characters or nil. The value nil means display the character in the
5799 default fashion; otherwise, the characters from the vector are delivered
5800 to the screen instead of the original character.
5802 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5803 to display a capital Y instead of each X character.
5805 In addition, a char-table has six extra slots to control the display of:
5807 the end of a truncated screen line (extra-slot 0, a single character);
5808 the end of a continued line (extra-slot 1, a single character);
5809 the escape character used to display character codes in octal
5810 (extra-slot 2, a single character);
5811 the character used as an arrow for control characters (extra-slot 3,
5812 a single character);
5813 the decoration indicating the presence of invisible lines (extra-slot 4,
5814 a vector of characters);
5815 the character used to draw the border between side-by-side windows
5816 (extra-slot 5, a single character).
5818 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5820 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5822 doc
: /* *Width of left marginal area for display of a buffer.
5823 A value of nil means no marginal area. */);
5825 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5827 doc
: /* *Width of right marginal area for display of a buffer.
5828 A value of nil means no marginal area. */);
5830 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5832 doc
: /* *Width of this buffer's left fringe (in pixels).
5833 A value of 0 means no left fringe is shown in this buffer's window.
5834 A value of nil means to use the left fringe width from the window's frame. */);
5836 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5838 doc
: /* *Width of this buffer's right fringe (in pixels).
5839 A value of 0 means no right fringe is shown in this buffer's window.
5840 A value of nil means to use the right fringe width from the window's frame. */);
5842 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5844 doc
: /* *Non-nil means to display fringes outside display margins.
5845 A value of nil means to display fringes between margins and buffer text. */);
5847 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5849 doc
: /* *Width of this buffer's scroll bars in pixels.
5850 A value of nil means to use the scroll bar width from the window's frame. */);
5852 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5854 doc
: /* *Position of this buffer's vertical scroll bar.
5855 The value takes effect whenever you tell a window to display this buffer;
5856 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5858 A value of `left' or `right' means put the vertical scroll bar at that side
5859 of the window; a value of nil means don't show any vertical scroll bars.
5860 A value of t (the default) means do whatever the window's frame specifies. */);
5862 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5863 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5864 doc
: /* *Visually indicate empty lines after the buffer end.
5865 If non-nil, a bitmap is displayed in the left fringe of a window on
5866 window-systems. */);
5868 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5869 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
5870 doc
: /* *Visually indicate buffer boundaries and scrolling.
5871 If non-nil, the first and last line of the buffer are marked in the fringe
5872 of a window on window-systems with angle bitmaps, or if the window can be
5873 scrolled, the top and bottom line of the window are marked with up and down
5876 If value is a symbol `left' or `right', both angle and arrow bitmaps
5877 are displayed in the left or right fringe, resp. Any other value
5878 that doesn't look like an alist means display the angle bitmaps in
5879 the left fringe but no arrows.
5881 You can exercise more precise control by using an alist as the
5882 value. Each alist element (INDICATOR . POSITION) specifies
5883 where to show one of the indicators. INDICATOR is one of `top',
5884 `bottom', `up', `down', or t, which specifies the default position,
5885 and POSITION is one of `left', `right', or nil, meaning do not show
5888 For example, ((top . left) (t . right)) places the top angle bitmap in
5889 left fringe, the bottom angle bitmap in right fringe, and both arrow
5890 bitmaps in right fringe. To show just the angle bitmaps in the left
5891 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5893 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5894 ¤t_buffer
->fringe_indicator_alist
, Qnil
,
5895 doc
: /* *Mapping from logical to physical fringe indicator bitmaps.
5896 The value is an alist where each element (INDICATOR . BITMAPS)
5897 specifies the fringe bitmaps used to display a specific logical
5900 INDICATOR specifies the logical indicator type which is one of the
5901 following symbols: `truncation' , `continuation', `overlay-arrow',
5902 `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'.
5904 BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5905 the actual bitmap shown in the left or right fringe for the logical
5906 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5907 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5908 are used only for the `bottom' and `one-line' indicators when the last
5909 \(only) line in has no final newline. BITMAPS may also be a single
5910 symbol which is used in both left and right fringes. */);
5912 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5913 ¤t_buffer
->fringe_cursor_alist
, Qnil
,
5914 doc
: /* *Mapping from logical to physical fringe cursor bitmaps.
5915 The value is an alist where each element (CURSOR . BITMAP)
5916 specifies the fringe bitmaps used to display a specific logical
5917 cursor type in the fringe.
5919 CURSOR specifies the logical cursor type which is one of the following
5920 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5921 one is used to show a hollow cursor on narrow lines display lines
5922 where the normal hollow cursor will not fit.
5924 BITMAP is the corresponding fringe bitmap shown for the logical
5927 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5928 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5929 doc
: /* How far to scroll windows upward.
5930 If you move point off the bottom, the window scrolls automatically.
5931 This variable controls how far it scrolls. The value nil, the default,
5932 means scroll to center point. A fraction means scroll to put point
5933 that fraction of the window's height from the bottom of the window.
5934 When the value is 0.0, point goes at the bottom line, which in the
5935 simple case that you moved off with C-f means scrolling just one line.
5936 1.0 means point goes at the top, so that in that simple case, the
5937 window scrolls by a full window height. Meaningful values are
5938 between 0.0 and 1.0, inclusive. */);
5940 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5941 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5942 doc
: /* How far to scroll windows downward.
5943 If you move point off the top, the window scrolls automatically.
5944 This variable controls how far it scrolls. The value nil, the default,
5945 means scroll to center point. A fraction means scroll to put point
5946 that fraction of the window's height from the top of the window.
5947 When the value is 0.0, point goes at the top line, which in the
5948 simple case that you moved off with C-b means scrolling just one line.
5949 1.0 means point goes at the bottom, so that in that simple case, the
5950 window scrolls by a full window height. Meaningful values are
5951 between 0.0 and 1.0, inclusive. */);
5953 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5957 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5958 doc
: /* List of functions to call before each text change.
5959 Two arguments are passed to each function: the positions of
5960 the beginning and end of the range of old text to be changed.
5961 \(For an insertion, the beginning and end are at the same place.)
5962 No information is given about the length of the text after the change.
5964 Buffer changes made while executing the `before-change-functions'
5965 don't call any before-change or after-change functions.
5966 That's because these variables are temporarily set to nil.
5967 As a result, a hook function cannot straightforwardly alter the
5968 value of these variables. See the Emacs Lisp manual for a way of
5969 accomplishing an equivalent result by using other variables.
5971 If an unhandled error happens in running these functions,
5972 the variable's value remains nil. That prevents the error
5973 from happening repeatedly and making Emacs nonfunctional. */);
5974 Vbefore_change_functions
= Qnil
;
5976 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5977 doc
: /* List of functions to call after each text change.
5978 Three arguments are passed to each function: the positions of
5979 the beginning and end of the range of changed text,
5980 and the length in bytes of the pre-change text replaced by that range.
5981 \(For an insertion, the pre-change length is zero;
5982 for a deletion, that length is the number of bytes deleted,
5983 and the post-change beginning and end are at the same place.)
5985 Buffer changes made while executing the `after-change-functions'
5986 don't call any before-change or after-change functions.
5987 That's because these variables are temporarily set to nil.
5988 As a result, a hook function cannot straightforwardly alter the
5989 value of these variables. See the Emacs Lisp manual for a way of
5990 accomplishing an equivalent result by using other variables.
5992 If an unhandled error happens in running these functions,
5993 the variable's value remains nil. That prevents the error
5994 from happening repeatedly and making Emacs nonfunctional. */);
5995 Vafter_change_functions
= Qnil
;
5997 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5998 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5999 The functions are run using the `run-hooks' function. */);
6000 Vfirst_change_hook
= Qnil
;
6002 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
6003 doc
: /* List of undo entries in current buffer.
6004 Recent changes come first; older changes follow newer.
6006 An entry (BEG . END) represents an insertion which begins at
6007 position BEG and ends at position END.
6009 An entry (TEXT . POSITION) represents the deletion of the string TEXT
6010 from (abs POSITION). If POSITION is positive, point was at the front
6011 of the text being deleted; if negative, point was at the end.
6013 An entry (t HIGH . LOW) indicates that the buffer previously had
6014 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
6015 of the visited file's modification time, as of that time. If the
6016 modification time of the most recent save is different, this entry is
6019 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
6020 was modified between BEG and END. PROPERTY is the property name,
6021 and VALUE is the old value.
6023 An entry (apply FUN-NAME . ARGS) means undo the change with
6024 \(apply FUN-NAME ARGS).
6026 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
6027 in the active region. BEG and END is the range affected by this entry
6028 and DELTA is the number of bytes added or deleted in that range by
6031 An entry (MARKER . DISTANCE) indicates that the marker MARKER
6032 was adjusted in position by the offset DISTANCE (an integer).
6034 An entry of the form POSITION indicates that point was at the buffer
6035 location given by the integer. Undoing an entry of this form places
6038 Entries with value `nil' mark undo boundaries. The undo command treats
6039 the changes between two undo boundaries as a single step to be undone.
6041 If the value of the variable is t, undo information is not recorded. */);
6043 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
6044 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
6046 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
6047 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
6049 Normally, the line-motion functions work by scanning the buffer for
6050 newlines. Columnar operations (like `move-to-column' and
6051 `compute-motion') also work by scanning the buffer, summing character
6052 widths as they go. This works well for ordinary text, but if the
6053 buffer's lines are very long (say, more than 500 characters), these
6054 motion functions will take longer to execute. Emacs may also take
6055 longer to update the display.
6057 If `cache-long-line-scans' is non-nil, these motion functions cache the
6058 results of their scans, and consult the cache to avoid rescanning
6059 regions of the buffer until the text is modified. The caches are most
6060 beneficial when they prevent the most searching---that is, when the
6061 buffer contains long lines and large regions of characters with the
6062 same, fixed screen width.
6064 When `cache-long-line-scans' is non-nil, processing short lines will
6065 become slightly slower (because of the overhead of consulting the
6066 cache), and the caches will use memory roughly proportional to the
6067 number of newlines and characters whose screen width varies.
6069 The caches require no explicit maintenance; their accuracy is
6070 maintained internally by the Emacs primitives. Enabling or disabling
6071 the cache should not affect the behavior of any of the motion
6072 functions; it should only affect their performance. */);
6074 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
6075 doc
: /* Value of point before the last series of scroll operations, or nil. */);
6077 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
6078 doc
: /* List of formats to use when saving this buffer.
6079 Formats are defined by `format-alist'. This variable is
6080 set when a file is visited. */);
6082 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
6083 ¤t_buffer
->auto_save_file_format
, Qnil
,
6084 doc
: /* *Format in which to write auto-save files.
6085 Should be a list of symbols naming formats that are defined in `format-alist'.
6086 If it is t, which is the default, auto-save files are written in the
6087 same format as a regular save would use. */);
6089 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
6090 ¤t_buffer
->invisibility_spec
, Qnil
,
6091 doc
: /* Invisibility spec of this buffer.
6092 The default is t, which means that text is invisible
6093 if it has a non-nil `invisible' property.
6094 If the value is a list, a text character is invisible if its `invisible'
6095 property is an element in that list (or is a list with members in common).
6096 If an element is a cons cell of the form (PROP . ELLIPSIS),
6097 then characters with property value PROP are invisible,
6098 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
6100 DEFVAR_PER_BUFFER ("buffer-display-count",
6101 ¤t_buffer
->display_count
, Qnil
,
6102 doc
: /* A number incremented each time this buffer is displayed in a window.
6103 The function `set-window-buffer' increments it. */);
6105 DEFVAR_PER_BUFFER ("buffer-display-time",
6106 ¤t_buffer
->display_time
, Qnil
,
6107 doc
: /* Time stamp updated each time this buffer is displayed in a window.
6108 The function `set-window-buffer' updates this variable
6109 to the value obtained by calling `current-time'.
6110 If the buffer has never been shown in a window, the value is nil. */);
6112 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
6114 Vtransient_mark_mode
= Qnil
;
6115 /* The docstring is in simple.el. If we put it here, it would be
6116 overwritten when transient-mark-mode is defined using
6117 define-minor-mode. */
6119 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
6120 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
6121 If the value is t, disregard `buffer-read-only' and all `read-only'
6122 text properties. If the value is a list, disregard `buffer-read-only'
6123 and disregard a `read-only' text property if the property value
6124 is a member of the list. */);
6125 Vinhibit_read_only
= Qnil
;
6127 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
6128 doc
: /* Cursor to use when this buffer is in the selected window.
6129 Values are interpreted as follows:
6131 t use the cursor specified for the frame
6132 nil don't display a cursor
6133 box display a filled box cursor
6134 hollow display a hollow box cursor
6135 bar display a vertical bar cursor with default width
6136 (bar . WIDTH) display a vertical bar cursor with width WIDTH
6137 hbar display a horizontal bar cursor with default height
6138 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
6139 ANYTHING ELSE display a hollow box cursor
6141 When the buffer is displayed in a non-selected window, the
6142 cursor's appearance is instead controlled by the variable
6143 `cursor-in-non-selected-windows'. */);
6145 DEFVAR_PER_BUFFER ("line-spacing",
6146 ¤t_buffer
->extra_line_spacing
, Qnil
,
6147 doc
: /* Additional space to put between lines when displaying a buffer.
6148 The space is measured in pixels, and put below lines on graphic displays,
6149 see `display-graphic-p'.
6150 If value is a floating point number, it specifies the spacing relative
6151 to the default frame line height. A value of nil means add no extra space. */);
6153 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
6154 ¤t_buffer
->cursor_in_non_selected_windows
, Qnil
,
6155 doc
: /* *Cursor type to display in non-selected windows.
6156 The value t means to use hollow box cursor. See `cursor-type' for other values. */);
6158 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
6159 doc
: /* List of functions called with no args to query before killing a buffer.
6160 The buffer being killed will be current while the functions are running.
6161 If any of them returns nil, the buffer is not killed. */);
6162 Vkill_buffer_query_functions
= Qnil
;
6164 DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook
,
6165 doc
: /* Normal hook run before changing the major mode of a buffer.
6166 The function `kill-all-local-variables' runs this before doing anything else. */);
6167 Vchange_major_mode_hook
= Qnil
;
6168 Qchange_major_mode_hook
= intern_c_string ("change-major-mode-hook");
6169 staticpro (&Qchange_major_mode_hook
);
6171 defsubr (&Sbuffer_live_p
);
6172 defsubr (&Sbuffer_list
);
6173 defsubr (&Sget_buffer
);
6174 defsubr (&Sget_file_buffer
);
6175 defsubr (&Sget_buffer_create
);
6176 defsubr (&Smake_indirect_buffer
);
6177 defsubr (&Sgenerate_new_buffer_name
);
6178 defsubr (&Sbuffer_name
);
6179 /*defsubr (&Sbuffer_number);*/
6180 defsubr (&Sbuffer_file_name
);
6181 defsubr (&Sbuffer_base_buffer
);
6182 defsubr (&Sbuffer_local_value
);
6183 defsubr (&Sbuffer_local_variables
);
6184 defsubr (&Sbuffer_modified_p
);
6185 defsubr (&Sset_buffer_modified_p
);
6186 defsubr (&Sbuffer_modified_tick
);
6187 defsubr (&Sbuffer_chars_modified_tick
);
6188 defsubr (&Srename_buffer
);
6189 defsubr (&Sother_buffer
);
6190 defsubr (&Sbuffer_enable_undo
);
6191 defsubr (&Skill_buffer
);
6192 defsubr (&Sset_buffer_major_mode
);
6193 defsubr (&Sswitch_to_buffer
);
6194 defsubr (&Scurrent_buffer
);
6195 defsubr (&Sset_buffer
);
6196 defsubr (&Sbarf_if_buffer_read_only
);
6197 defsubr (&Sbury_buffer
);
6198 defsubr (&Serase_buffer
);
6199 defsubr (&Sbuffer_swap_text
);
6200 defsubr (&Sset_buffer_multibyte
);
6201 defsubr (&Skill_all_local_variables
);
6203 defsubr (&Soverlayp
);
6204 defsubr (&Smake_overlay
);
6205 defsubr (&Sdelete_overlay
);
6206 defsubr (&Smove_overlay
);
6207 defsubr (&Soverlay_start
);
6208 defsubr (&Soverlay_end
);
6209 defsubr (&Soverlay_buffer
);
6210 defsubr (&Soverlay_properties
);
6211 defsubr (&Soverlays_at
);
6212 defsubr (&Soverlays_in
);
6213 defsubr (&Snext_overlay_change
);
6214 defsubr (&Sprevious_overlay_change
);
6215 defsubr (&Soverlay_recenter
);
6216 defsubr (&Soverlay_lists
);
6217 defsubr (&Soverlay_get
);
6218 defsubr (&Soverlay_put
);
6219 defsubr (&Srestore_buffer_modified_p
);
6223 keys_of_buffer (void)
6225 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6226 initial_define_key (control_x_map
, 'k', "kill-buffer");
6228 /* This must not be in syms_of_buffer, because Qdisabled is not
6229 initialized when that function gets called. */
6230 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);
6233 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
6234 (do not change this comment) */