1 /* Buffer manipulation primitives for GNU Emacs.
3 Copyright (C) 1985-1989, 1993-1995, 1997-2011 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
22 #include <sys/types.h>
24 #include <sys/param.h>
33 #include "intervals.h"
37 #include "character.h"
38 #include "region-cache.h"
40 #include "blockinput.h"
45 struct buffer
*current_buffer
; /* the current buffer */
47 /* First buffer in chain of all buffers (in reverse order of creation).
48 Threaded through ->header.next.buffer. */
50 struct buffer
*all_buffers
;
52 /* This structure holds the default values of the buffer-local variables
53 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
54 The default value occupies the same slot in this structure
55 as an individual buffer's value occupies in that buffer.
56 Setting the default value also goes through the alist of buffers
57 and stores into each buffer that does not say it has a local value. */
59 DECL_ALIGN (struct buffer
, buffer_defaults
);
61 /* A Lisp_Object pointer to the above, used for staticpro */
63 static Lisp_Object Vbuffer_defaults
;
65 /* This structure marks which slots in a buffer have corresponding
66 default values in buffer_defaults.
67 Each such slot has a nonzero value in this structure.
68 The value has only one nonzero bit.
70 When a buffer has its own local value for a slot,
71 the entry for that slot (found in the same slot in this structure)
72 is turned on in the buffer's local_flags array.
74 If a slot in this structure is -1, then even though there may
75 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
76 and the corresponding slot in buffer_defaults is not used.
78 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
79 zero, that is a bug */
81 struct buffer buffer_local_flags
;
83 /* This structure holds the names of symbols whose values may be
84 buffer-local. It is indexed and accessed in the same way as the above. */
86 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
88 /* A Lisp_Object pointer to the above, used for staticpro */
89 static Lisp_Object Vbuffer_local_symbols
;
91 /* Return the symbol of the per-buffer variable at offset OFFSET in
92 the buffer structure. */
94 #define PER_BUFFER_SYMBOL(OFFSET) \
95 (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols))
97 /* Maximum length of an overlay vector. */
98 #define OVERLAY_COUNT_MAX \
99 ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, \
100 min (PTRDIFF_MAX, SIZE_MAX) / sizeof (Lisp_Object)))
102 /* Flags indicating which built-in buffer-local variables
103 are permanent locals. */
104 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
106 /* Number of per-buffer variables used. */
108 int last_per_buffer_idx
;
110 static Lisp_Object
Fset_buffer_major_mode (Lisp_Object
);
111 static Lisp_Object
Fdelete_overlay (Lisp_Object
);
112 static void call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
,
113 int after
, Lisp_Object arg1
,
114 Lisp_Object arg2
, Lisp_Object arg3
);
115 static void swap_out_buffer_local_variables (struct buffer
*b
);
116 static void reset_buffer_local_variables (struct buffer
*b
, int permanent_too
);
118 /* Alist of all buffer names vs the buffers. */
119 /* This used to be a variable, but is no longer,
120 to prevent lossage due to user rplac'ing this alist or its elements. */
121 Lisp_Object Vbuffer_alist
;
123 static Lisp_Object Qkill_buffer_query_functions
;
125 /* Hook run before changing a major mode. */
126 static Lisp_Object Qchange_major_mode_hook
;
128 Lisp_Object Qfirst_change_hook
;
129 Lisp_Object Qbefore_change_functions
;
130 Lisp_Object Qafter_change_functions
;
131 static Lisp_Object Qucs_set_table_for_input
;
133 static Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
134 static Lisp_Object Qpermanent_local_hook
;
136 static Lisp_Object Qprotected_field
;
138 static Lisp_Object QSFundamental
; /* A string "Fundamental" */
140 static Lisp_Object Qkill_buffer_hook
;
141 static Lisp_Object Qbuffer_list_update_hook
;
143 static Lisp_Object Qget_file_buffer
;
145 static Lisp_Object Qoverlayp
;
147 Lisp_Object Qpriority
, Qbefore_string
, Qafter_string
;
149 static Lisp_Object Qevaporate
;
151 Lisp_Object Qmodification_hooks
;
152 Lisp_Object Qinsert_in_front_hooks
;
153 Lisp_Object Qinsert_behind_hooks
;
155 static void alloc_buffer_text (struct buffer
*, ptrdiff_t);
156 static void free_buffer_text (struct buffer
*b
);
157 static struct Lisp_Overlay
* copy_overlays (struct buffer
*, struct Lisp_Overlay
*);
158 static void modify_overlay (struct buffer
*, ptrdiff_t, ptrdiff_t);
159 static Lisp_Object
buffer_lisp_local_variables (struct buffer
*);
161 /* For debugging; temporary. See set_buffer_internal. */
162 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
165 nsberror (Lisp_Object spec
)
168 error ("No buffer named %s", SDATA (spec
));
169 error ("Invalid buffer argument");
172 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
173 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
174 Value is nil if OBJECT is not a buffer or if it has been killed. */)
177 return ((BUFFERP (object
) && ! NILP (BVAR (XBUFFER (object
), name
)))
181 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
182 doc
: /* Return a list of all existing live buffers.
183 If the optional arg FRAME is a frame, we return the buffer list in the
184 proper order for that frame: the buffers show in FRAME come first,
185 followed by the rest of the buffers. */)
189 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
193 Lisp_Object framelist
, prevlist
, tail
;
197 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
198 prevlist
= Fnreverse (Fcopy_sequence
199 (XFRAME (frame
)->buried_buffer_list
));
201 /* Remove from GENERAL any buffer that duplicates one in
202 FRAMELIST or PREVLIST. */
206 general
= Fdelq (XCAR (tail
), general
);
212 general
= Fdelq (XCAR (tail
), general
);
219 return Fnconc (3, args
);
225 /* Like Fassoc, but use Fstring_equal to compare
226 (which ignores text properties),
227 and don't ever QUIT. */
230 assoc_ignore_text_properties (register Lisp_Object key
, Lisp_Object list
)
232 register Lisp_Object tail
;
233 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
235 register Lisp_Object elt
, tem
;
237 tem
= Fstring_equal (Fcar (elt
), key
);
244 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
245 doc
: /* Return the buffer named BUFFER-OR-NAME.
246 BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME
247 is a string and there is no buffer with that name, return nil. If
248 BUFFER-OR-NAME is a buffer, return it as given. */)
249 (register Lisp_Object buffer_or_name
)
251 if (BUFFERP (buffer_or_name
))
252 return buffer_or_name
;
253 CHECK_STRING (buffer_or_name
);
255 return Fcdr (assoc_ignore_text_properties (buffer_or_name
, Vbuffer_alist
));
258 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
259 doc
: /* Return the buffer visiting file FILENAME (a string).
260 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
261 If there is no such live buffer, return nil.
262 See also `find-buffer-visiting'. */)
263 (register Lisp_Object filename
)
265 register Lisp_Object tail
, buf
, tem
;
268 CHECK_STRING (filename
);
269 filename
= Fexpand_file_name (filename
, Qnil
);
271 /* If the file name has special constructs in it,
272 call the corresponding file handler. */
273 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
275 return call2 (handler
, Qget_file_buffer
, filename
);
277 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
279 buf
= Fcdr (XCAR (tail
));
280 if (!BUFFERP (buf
)) continue;
281 if (!STRINGP (BVAR (XBUFFER (buf
), filename
))) continue;
282 tem
= Fstring_equal (BVAR (XBUFFER (buf
), filename
), filename
);
290 get_truename_buffer (register Lisp_Object filename
)
292 register Lisp_Object tail
, buf
, tem
;
294 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
296 buf
= Fcdr (XCAR (tail
));
297 if (!BUFFERP (buf
)) continue;
298 if (!STRINGP (BVAR (XBUFFER (buf
), file_truename
))) continue;
299 tem
= Fstring_equal (BVAR (XBUFFER (buf
), file_truename
), filename
);
306 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
307 doc
: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed.
308 If BUFFER-OR-NAME is a string and a live buffer with that name exists,
309 return that buffer. If no such buffer exists, create a new buffer with
310 that name and return it. If BUFFER-OR-NAME starts with a space, the new
311 buffer does not keep undo information.
313 If BUFFER-OR-NAME is a buffer instead of a string, return it as given,
314 even if it is dead. The return value is never nil. */)
315 (register Lisp_Object buffer_or_name
)
317 register Lisp_Object buffer
, name
;
318 register struct buffer
*b
;
320 buffer
= Fget_buffer (buffer_or_name
);
324 if (SCHARS (buffer_or_name
) == 0)
325 error ("Empty string for buffer name is not allowed");
327 b
= allocate_buffer ();
329 /* An ordinary buffer uses its own struct buffer_text. */
330 b
->text
= &b
->own_text
;
333 BUF_GAP_SIZE (b
) = 20;
335 /* We allocate extra 1-byte at the tail and keep it always '\0' for
336 anchoring a search. */
337 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
339 if (! BUF_BEG_ADDR (b
))
340 buffer_memory_full (BUF_GAP_SIZE (b
) + 1);
345 b
->pt_byte
= BEG_BYTE
;
346 b
->begv_byte
= BEG_BYTE
;
347 b
->zv_byte
= BEG_BYTE
;
350 BUF_GPT_BYTE (b
) = BEG_BYTE
;
353 BUF_Z_BYTE (b
) = BEG_BYTE
;
355 BUF_CHARS_MODIFF (b
) = 1;
356 BUF_OVERLAY_MODIFF (b
) = 1;
357 BUF_SAVE_MODIFF (b
) = 1;
358 BUF_INTERVALS (b
) = 0;
359 BUF_UNCHANGED_MODIFIED (b
) = 1;
360 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
361 BUF_END_UNCHANGED (b
) = 0;
362 BUF_BEG_UNCHANGED (b
) = 0;
363 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
364 b
->text
->inhibit_shrinking
= 0;
366 b
->newline_cache
= 0;
367 b
->width_run_cache
= 0;
368 BVAR (b
, width_table
) = Qnil
;
369 b
->prevent_redisplay_optimizations_p
= 1;
371 /* Put this on the chain of all buffers including killed ones. */
372 b
->header
.next
.buffer
= all_buffers
;
375 /* An ordinary buffer normally doesn't need markers
376 to handle BEGV and ZV. */
377 BVAR (b
, pt_marker
) = Qnil
;
378 BVAR (b
, begv_marker
) = Qnil
;
379 BVAR (b
, zv_marker
) = Qnil
;
381 name
= Fcopy_sequence (buffer_or_name
);
382 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
383 BVAR (b
, name
) = name
;
385 BVAR (b
, undo_list
) = (SREF (name
, 0) != ' ') ? Qnil
: Qt
;
388 reset_buffer_local_variables (b
, 1);
390 BVAR (b
, mark
) = Fmake_marker ();
391 BUF_MARKERS (b
) = NULL
;
392 BVAR (b
, name
) = name
;
394 /* Put this in the alist of all live buffers. */
395 XSETBUFFER (buffer
, b
);
396 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
397 /* And run buffer-list-update-hook. */
398 if (!NILP (Vrun_hooks
))
399 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
401 /* An error in calling the function here (should someone redefine it)
402 can lead to infinite regress until you run out of stack. rms
403 says that's not worth protecting against. */
404 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
405 /* buffer is on buffer-alist, so no gcpro. */
406 call1 (Qucs_set_table_for_input
, buffer
);
412 /* Return a list of overlays which is a copy of the overlay list
413 LIST, but for buffer B. */
415 static struct Lisp_Overlay
*
416 copy_overlays (struct buffer
*b
, struct Lisp_Overlay
*list
)
419 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
421 XSETBUFFER (buffer
, b
);
423 for (; list
; list
= list
->next
)
425 Lisp_Object overlay
, start
, end
, old_overlay
;
428 XSETMISC (old_overlay
, list
);
429 charpos
= marker_position (OVERLAY_START (old_overlay
));
430 start
= Fmake_marker ();
431 Fset_marker (start
, make_number (charpos
), buffer
);
432 XMARKER (start
)->insertion_type
433 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
435 charpos
= marker_position (OVERLAY_END (old_overlay
));
436 end
= Fmake_marker ();
437 Fset_marker (end
, make_number (charpos
), buffer
);
438 XMARKER (end
)->insertion_type
439 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
441 overlay
= allocate_misc ();
442 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
443 OVERLAY_START (overlay
) = start
;
444 OVERLAY_END (overlay
) = end
;
445 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
446 XOVERLAY (overlay
)->next
= NULL
;
449 tail
= tail
->next
= XOVERLAY (overlay
);
451 result
= tail
= XOVERLAY (overlay
);
458 /* Clone per-buffer values of buffer FROM.
460 Buffer TO gets the same per-buffer values as FROM, with the
461 following exceptions: (1) TO's name is left untouched, (2) markers
462 are copied and made to refer to TO, and (3) overlay lists are
466 clone_per_buffer_values (struct buffer
*from
, struct buffer
*to
)
468 Lisp_Object to_buffer
;
471 XSETBUFFER (to_buffer
, to
);
473 /* buffer-local Lisp variables start at `undo_list',
474 tho only the ones from `name' on are GC'd normally. */
475 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
476 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
477 offset
+= sizeof (Lisp_Object
))
481 /* Don't touch the `name' which should be unique for every buffer. */
482 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
485 obj
= PER_BUFFER_VALUE (from
, offset
);
486 if (MARKERP (obj
) && XMARKER (obj
)->buffer
== from
)
488 struct Lisp_Marker
*m
= XMARKER (obj
);
489 obj
= Fmake_marker ();
490 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
491 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
494 PER_BUFFER_VALUE (to
, offset
) = obj
;
497 memcpy (to
->local_flags
, from
->local_flags
, sizeof to
->local_flags
);
499 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
500 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
502 /* Get (a copy of) the alist of Lisp-level local variables of FROM
503 and install that in TO. */
504 BVAR (to
, local_var_alist
) = buffer_lisp_local_variables (from
);
508 /* If buffer B has markers to record PT, BEGV and ZV when it is not
509 current, update these markers. */
512 record_buffer_markers (struct buffer
*b
)
514 if (! NILP (BVAR (b
, pt_marker
)))
518 eassert (!NILP (BVAR (b
, begv_marker
)));
519 eassert (!NILP (BVAR (b
, zv_marker
)));
521 XSETBUFFER (buffer
, b
);
522 set_marker_both (BVAR (b
, pt_marker
), buffer
, b
->pt
, b
->pt_byte
);
523 set_marker_both (BVAR (b
, begv_marker
), buffer
, b
->begv
, b
->begv_byte
);
524 set_marker_both (BVAR (b
, zv_marker
), buffer
, b
->zv
, b
->zv_byte
);
529 /* If buffer B has markers to record PT, BEGV and ZV when it is not
530 current, fetch these values into B->begv etc. */
533 fetch_buffer_markers (struct buffer
*b
)
535 if (! NILP (BVAR (b
, pt_marker
)))
539 eassert (!NILP (BVAR (b
, begv_marker
)));
540 eassert (!NILP (BVAR (b
, zv_marker
)));
542 m
= BVAR (b
, pt_marker
);
543 SET_BUF_PT_BOTH (b
, marker_position (m
), marker_byte_position (m
));
545 m
= BVAR (b
, begv_marker
);
546 SET_BUF_BEGV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
548 m
= BVAR (b
, zv_marker
);
549 SET_BUF_ZV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
554 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
556 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
557 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
558 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
559 NAME should be a string which is not the name of an existing buffer.
560 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
561 such as major and minor modes, in the indirect buffer.
562 CLONE nil means the indirect buffer's state is reset to default values. */)
563 (Lisp_Object base_buffer
, Lisp_Object name
, Lisp_Object clone
)
565 Lisp_Object buf
, tem
;
569 buf
= Fget_buffer (name
);
571 error ("Buffer name `%s' is in use", SDATA (name
));
574 base_buffer
= Fget_buffer (base_buffer
);
575 if (NILP (base_buffer
))
576 error ("No such buffer: `%s'", SDATA (tem
));
577 if (NILP (BVAR (XBUFFER (base_buffer
), name
)))
578 error ("Base buffer has been killed");
580 if (SCHARS (name
) == 0)
581 error ("Empty string for buffer name is not allowed");
583 b
= allocate_buffer ();
585 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
586 ? XBUFFER (base_buffer
)->base_buffer
587 : XBUFFER (base_buffer
));
589 /* Use the base buffer's text object. */
590 b
->text
= b
->base_buffer
->text
;
592 b
->pt
= b
->base_buffer
->pt
;
593 b
->begv
= b
->base_buffer
->begv
;
594 b
->zv
= b
->base_buffer
->zv
;
595 b
->pt_byte
= b
->base_buffer
->pt_byte
;
596 b
->begv_byte
= b
->base_buffer
->begv_byte
;
597 b
->zv_byte
= b
->base_buffer
->zv_byte
;
599 b
->newline_cache
= 0;
600 b
->width_run_cache
= 0;
601 BVAR (b
, width_table
) = Qnil
;
603 /* Put this on the chain of all buffers including killed ones. */
604 b
->header
.next
.buffer
= all_buffers
;
607 name
= Fcopy_sequence (name
);
608 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
609 BVAR (b
, name
) = name
;
612 reset_buffer_local_variables (b
, 1);
614 /* Put this in the alist of all live buffers. */
616 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
618 BVAR (b
, mark
) = Fmake_marker ();
619 BVAR (b
, name
) = name
;
621 /* The multibyte status belongs to the base buffer. */
622 BVAR (b
, enable_multibyte_characters
) = BVAR (b
->base_buffer
, enable_multibyte_characters
);
624 /* Make sure the base buffer has markers for its narrowing. */
625 if (NILP (BVAR (b
->base_buffer
, pt_marker
)))
627 eassert (NILP (BVAR (b
->base_buffer
, begv_marker
)));
628 eassert (NILP (BVAR (b
->base_buffer
, zv_marker
)));
630 BVAR (b
->base_buffer
, pt_marker
) = Fmake_marker ();
631 set_marker_both (BVAR (b
->base_buffer
, pt_marker
), base_buffer
,
633 b
->base_buffer
->pt_byte
);
635 BVAR (b
->base_buffer
, begv_marker
) = Fmake_marker ();
636 set_marker_both (BVAR (b
->base_buffer
, begv_marker
), base_buffer
,
637 b
->base_buffer
->begv
,
638 b
->base_buffer
->begv_byte
);
640 BVAR (b
->base_buffer
, zv_marker
) = Fmake_marker ();
641 set_marker_both (BVAR (b
->base_buffer
, zv_marker
), base_buffer
,
643 b
->base_buffer
->zv_byte
);
644 XMARKER (BVAR (b
->base_buffer
, zv_marker
))->insertion_type
= 1;
649 /* Give the indirect buffer markers for its narrowing. */
650 BVAR (b
, pt_marker
) = Fmake_marker ();
651 set_marker_both (BVAR (b
, pt_marker
), buf
, b
->pt
, b
->pt_byte
);
652 BVAR (b
, begv_marker
) = Fmake_marker ();
653 set_marker_both (BVAR (b
, begv_marker
), buf
, b
->begv
, b
->begv_byte
);
654 BVAR (b
, zv_marker
) = Fmake_marker ();
655 set_marker_both (BVAR (b
, zv_marker
), buf
, b
->zv
, b
->zv_byte
);
656 XMARKER (BVAR (b
, zv_marker
))->insertion_type
= 1;
660 struct buffer
*old_b
= current_buffer
;
662 clone_per_buffer_values (b
->base_buffer
, b
);
663 BVAR (b
, filename
) = Qnil
;
664 BVAR (b
, file_truename
) = Qnil
;
665 BVAR (b
, display_count
) = make_number (0);
666 BVAR (b
, backed_up
) = Qnil
;
667 BVAR (b
, auto_save_file_name
) = Qnil
;
668 set_buffer_internal_1 (b
);
669 Fset (intern ("buffer-save-without-query"), Qnil
);
670 Fset (intern ("buffer-file-number"), Qnil
);
671 Fset (intern ("buffer-stale-function"), Qnil
);
672 set_buffer_internal_1 (old_b
);
675 /* Run buffer-list-update-hook. */
676 if (!NILP (Vrun_hooks
))
677 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
683 delete_all_overlays (struct buffer
*b
)
687 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
688 have to empty the list, otherwise we end up with overlays that
689 think they belong to this buffer while the buffer doesn't know about
691 while (b
->overlays_before
)
693 XSETMISC (overlay
, b
->overlays_before
);
694 Fdelete_overlay (overlay
);
696 while (b
->overlays_after
)
698 XSETMISC (overlay
, b
->overlays_after
);
699 Fdelete_overlay (overlay
);
701 eassert (b
->overlays_before
== NULL
);
702 eassert (b
->overlays_after
== NULL
);
705 /* Reinitialize everything about a buffer except its name and contents
707 If called on an already-initialized buffer, the list of overlays
708 should be deleted before calling this function, otherwise we end up
709 with overlays that claim to belong to the buffer but the buffer
710 claims it doesn't belong to it. */
713 reset_buffer (register struct buffer
*b
)
715 BVAR (b
, filename
) = Qnil
;
716 BVAR (b
, file_truename
) = Qnil
;
717 BVAR (b
, directory
) = (current_buffer
) ? BVAR (current_buffer
, directory
) : Qnil
;
719 b
->modtime_size
= -1;
720 XSETFASTINT (BVAR (b
, save_length
), 0);
721 b
->last_window_start
= 1;
722 /* It is more conservative to start out "changed" than "unchanged". */
724 b
->prevent_redisplay_optimizations_p
= 1;
725 BVAR (b
, backed_up
) = Qnil
;
726 BUF_AUTOSAVE_MODIFF (b
) = 0;
727 b
->auto_save_failure_time
= 0;
728 BVAR (b
, auto_save_file_name
) = Qnil
;
729 BVAR (b
, read_only
) = Qnil
;
730 b
->overlays_before
= NULL
;
731 b
->overlays_after
= NULL
;
732 b
->overlay_center
= BEG
;
733 BVAR (b
, mark_active
) = Qnil
;
734 BVAR (b
, point_before_scroll
) = Qnil
;
735 BVAR (b
, file_format
) = Qnil
;
736 BVAR (b
, auto_save_file_format
) = Qt
;
737 BVAR (b
, last_selected_window
) = Qnil
;
738 XSETINT (BVAR (b
, display_count
), 0);
739 BVAR (b
, display_time
) = Qnil
;
740 BVAR (b
, enable_multibyte_characters
) = BVAR (&buffer_defaults
, enable_multibyte_characters
);
741 BVAR (b
, cursor_type
) = BVAR (&buffer_defaults
, cursor_type
);
742 BVAR (b
, extra_line_spacing
) = BVAR (&buffer_defaults
, extra_line_spacing
);
744 b
->display_error_modiff
= 0;
747 /* Reset buffer B's local variables info.
748 Don't use this on a buffer that has already been in use;
749 it does not treat permanent locals consistently.
750 Instead, use Fkill_all_local_variables.
752 If PERMANENT_TOO is 1, then we reset permanent
753 buffer-local variables. If PERMANENT_TOO is 0,
754 we preserve those. */
757 reset_buffer_local_variables (register struct buffer
*b
, int permanent_too
)
762 /* Reset the major mode to Fundamental, together with all the
763 things that depend on the major mode.
764 default-major-mode is handled at a higher level.
765 We ignore it here. */
766 BVAR (b
, major_mode
) = Qfundamental_mode
;
767 BVAR (b
, keymap
) = Qnil
;
768 BVAR (b
, mode_name
) = QSFundamental
;
769 BVAR (b
, minor_modes
) = Qnil
;
771 /* If the standard case table has been altered and invalidated,
772 fix up its insides first. */
773 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
774 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
775 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
776 Fset_standard_case_table (Vascii_downcase_table
);
778 BVAR (b
, downcase_table
) = Vascii_downcase_table
;
779 BVAR (b
, upcase_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
780 BVAR (b
, case_canon_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
781 BVAR (b
, case_eqv_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
782 BVAR (b
, invisibility_spec
) = Qt
;
784 /* Reset all (or most) per-buffer variables to their defaults. */
786 BVAR (b
, local_var_alist
) = Qnil
;
789 Lisp_Object tmp
, prop
, last
= Qnil
;
790 for (tmp
= BVAR (b
, local_var_alist
); CONSP (tmp
); tmp
= XCDR (tmp
))
791 if (!NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
793 /* If permanent-local, keep it. */
795 if (EQ (prop
, Qpermanent_local_hook
))
797 /* This is a partially permanent hook variable.
798 Preserve only the elements that want to be preserved. */
799 Lisp_Object list
, newlist
;
800 list
= XCDR (XCAR (tmp
));
804 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
806 Lisp_Object elt
= XCAR (list
);
807 /* Preserve element ELT if it's t,
808 if it is a function with a `permanent-local-hook' property,
809 or if it's not a symbol. */
812 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
813 newlist
= Fcons (elt
, newlist
);
815 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
818 /* Delete this local variable. */
819 else if (NILP (last
))
820 BVAR (b
, local_var_alist
) = XCDR (tmp
);
822 XSETCDR (last
, XCDR (tmp
));
825 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
826 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
827 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
829 /* For each slot that has a default value,
830 copy that into the slot. */
832 /* buffer-local Lisp variables start at `undo_list',
833 tho only the ones from `name' on are GC'd normally. */
834 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
835 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
836 offset
+= sizeof (Lisp_Object
))
838 int idx
= PER_BUFFER_IDX (offset
);
841 || buffer_permanent_local_flags
[idx
] == 0)))
842 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
846 /* We split this away from generate-new-buffer, because rename-buffer
847 and set-visited-file-name ought to be able to use this to really
848 rename the buffer properly. */
850 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
,
851 Sgenerate_new_buffer_name
, 1, 2, 0,
852 doc
: /* Return a string that is the name of no existing buffer based on NAME.
853 If there is no live buffer named NAME, then return NAME.
854 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
855 \(starting at 2) until an unused name is found, and then return that name.
856 Optional second argument IGNORE specifies a name that is okay to use (if
857 it is in the sequence to be tried) even if a buffer with that name exists. */)
858 (register Lisp_Object name
, Lisp_Object ignore
)
860 register Lisp_Object gentemp
, tem
;
862 char number
[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"];
866 tem
= Fstring_equal (name
, ignore
);
869 tem
= Fget_buffer (name
);
876 sprintf (number
, "<%"pD
"d>", ++count
);
877 gentemp
= concat2 (name
, build_string (number
));
878 tem
= Fstring_equal (gentemp
, ignore
);
881 tem
= Fget_buffer (gentemp
);
888 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
889 doc
: /* Return the name of BUFFER, as a string.
890 BUFFER defaults to the current buffer.
891 Return nil if BUFFER has been killed. */)
892 (register Lisp_Object buffer
)
895 return BVAR (current_buffer
, name
);
896 CHECK_BUFFER (buffer
);
897 return BVAR (XBUFFER (buffer
), name
);
900 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
901 doc
: /* Return name of file BUFFER is visiting, or nil if none.
902 No argument or nil as argument means use the current buffer. */)
903 (register Lisp_Object buffer
)
906 return BVAR (current_buffer
, filename
);
907 CHECK_BUFFER (buffer
);
908 return BVAR (XBUFFER (buffer
), filename
);
911 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
913 doc
: /* Return the base buffer of indirect buffer BUFFER.
914 If BUFFER is not indirect, return nil.
915 BUFFER defaults to the current buffer. */)
916 (register Lisp_Object buffer
)
919 Lisp_Object base_buffer
;
922 base
= current_buffer
->base_buffer
;
925 CHECK_BUFFER (buffer
);
926 base
= XBUFFER (buffer
)->base_buffer
;
931 XSETBUFFER (base_buffer
, base
);
935 DEFUN ("buffer-local-value", Fbuffer_local_value
,
936 Sbuffer_local_value
, 2, 2, 0,
937 doc
: /* Return the value of VARIABLE in BUFFER.
938 If VARIABLE does not have a buffer-local binding in BUFFER, the value
939 is the default binding of the variable. */)
940 (register Lisp_Object variable
, register Lisp_Object buffer
)
942 register struct buffer
*buf
;
943 register Lisp_Object result
;
944 struct Lisp_Symbol
*sym
;
946 CHECK_SYMBOL (variable
);
947 CHECK_BUFFER (buffer
);
948 buf
= XBUFFER (buffer
);
949 sym
= XSYMBOL (variable
);
952 switch (sym
->redirect
)
954 case SYMBOL_VARALIAS
: sym
= indirect_variable (sym
); goto start
;
955 case SYMBOL_PLAINVAL
: result
= SYMBOL_VAL (sym
); break;
956 case SYMBOL_LOCALIZED
:
957 { /* Look in local_var_alist. */
958 struct Lisp_Buffer_Local_Value
*blv
= SYMBOL_BLV (sym
);
959 XSETSYMBOL (variable
, sym
); /* Update In case of aliasing. */
960 result
= Fassoc (variable
, BVAR (buf
, local_var_alist
));
964 { /* What binding is loaded right now? */
965 Lisp_Object current_alist_element
= blv
->valcell
;
967 /* The value of the currently loaded binding is not
968 stored in it, but rather in the realvalue slot.
969 Store that value into the binding it belongs to
970 in case that is the one we are about to use. */
972 XSETCDR (current_alist_element
,
973 do_symval_forwarding (blv
->fwd
));
975 /* Now get the (perhaps updated) value out of the binding. */
976 result
= XCDR (result
);
979 result
= Fdefault_value (variable
);
982 case SYMBOL_FORWARDED
:
984 union Lisp_Fwd
*fwd
= SYMBOL_FWD (sym
);
985 if (BUFFER_OBJFWDP (fwd
))
986 result
= PER_BUFFER_VALUE (buf
, XBUFFER_OBJFWD (fwd
)->offset
);
988 result
= Fdefault_value (variable
);
994 if (!EQ (result
, Qunbound
))
997 xsignal1 (Qvoid_variable
, variable
);
1000 /* Return an alist of the Lisp-level buffer-local bindings of
1001 buffer BUF. That is, don't include the variables maintained
1002 in special slots in the buffer object. */
1005 buffer_lisp_local_variables (struct buffer
*buf
)
1007 Lisp_Object result
= Qnil
;
1008 register Lisp_Object tail
;
1009 for (tail
= BVAR (buf
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1011 Lisp_Object val
, elt
;
1015 /* Reference each variable in the alist in buf.
1016 If inquiring about the current buffer, this gets the current values,
1017 so store them into the alist so the alist is up to date.
1018 If inquiring about some other buffer, this swaps out any values
1019 for that buffer, making the alist up to date automatically. */
1020 val
= find_symbol_value (XCAR (elt
));
1021 /* Use the current buffer value only if buf is the current buffer. */
1022 if (buf
!= current_buffer
)
1025 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
1031 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1032 Sbuffer_local_variables
, 0, 1, 0,
1033 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1034 Most elements look like (SYMBOL . VALUE), describing one variable.
1035 For a symbol that is locally unbound, just the symbol appears in the value.
1036 Note that storing new VALUEs in these elements doesn't change the variables.
1037 No argument or nil as argument means use current buffer as BUFFER. */)
1038 (register Lisp_Object buffer
)
1040 register struct buffer
*buf
;
1041 register Lisp_Object result
;
1044 buf
= current_buffer
;
1047 CHECK_BUFFER (buffer
);
1048 buf
= XBUFFER (buffer
);
1051 result
= buffer_lisp_local_variables (buf
);
1053 /* Add on all the variables stored in special slots. */
1057 /* buffer-local Lisp variables start at `undo_list',
1058 tho only the ones from `name' on are GC'd normally. */
1059 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
1060 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
1061 /* sizeof EMACS_INT == sizeof Lisp_Object */
1062 offset
+= (sizeof (EMACS_INT
)))
1064 idx
= PER_BUFFER_IDX (offset
);
1065 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1066 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1067 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1068 PER_BUFFER_VALUE (buf
, offset
)),
1076 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1078 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1079 No argument or nil as argument means use current buffer as BUFFER. */)
1080 (register Lisp_Object buffer
)
1082 register struct buffer
*buf
;
1084 buf
= current_buffer
;
1087 CHECK_BUFFER (buffer
);
1088 buf
= XBUFFER (buffer
);
1091 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1094 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1096 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1097 A non-nil FLAG means mark the buffer modified. */)
1098 (register Lisp_Object flag
)
1100 register int already
;
1101 register Lisp_Object fn
;
1102 Lisp_Object buffer
, window
;
1104 #ifdef CLASH_DETECTION
1105 /* If buffer becoming modified, lock the file.
1106 If buffer becoming unmodified, unlock the file. */
1108 fn
= BVAR (current_buffer
, file_truename
);
1109 /* Test buffer-file-name so that binding it to nil is effective. */
1110 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1112 already
= SAVE_MODIFF
< MODIFF
;
1113 if (!already
&& !NILP (flag
))
1115 else if (already
&& NILP (flag
))
1118 #endif /* CLASH_DETECTION */
1120 /* Here we have a problem. SAVE_MODIFF is used here to encode
1121 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1122 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1123 modify SAVE_MODIFF to affect one, we may affect the other
1125 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1126 if SAVE_MODIFF<auto_save_modified that means we risk changing
1127 recent-auto-save-p from t to nil.
1128 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1129 we risk changing recent-auto-save-p from nil to t. */
1130 SAVE_MODIFF
= (NILP (flag
)
1131 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1133 /* Let's try to preserve recent-auto-save-p. */
1134 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1135 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1136 we can either decrease SAVE_MODIFF and auto_save_modified
1137 or increase MODIFF. */
1140 /* Set update_mode_lines only if buffer is displayed in some window.
1141 Packages like jit-lock or lazy-lock preserve a buffer's modified
1142 state by recording/restoring the state around blocks of code.
1143 Setting update_mode_lines makes redisplay consider all windows
1144 (on all frames). Stealth fontification of buffers not displayed
1145 would incur additional redisplay costs if we'd set
1146 update_modes_lines unconditionally.
1148 Ideally, I think there should be another mechanism for fontifying
1149 buffers without "modifying" buffers, or redisplay should be
1150 smarter about updating the `*' in mode lines. --gerd */
1151 XSETBUFFER (buffer
, current_buffer
);
1152 window
= Fget_buffer_window (buffer
, Qt
);
1153 if (WINDOWP (window
))
1155 ++update_mode_lines
;
1156 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1162 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1163 Srestore_buffer_modified_p
, 1, 1, 0,
1164 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1165 It is not ensured that mode lines will be updated to show the modified
1166 state of the current buffer. Use with care. */)
1169 #ifdef CLASH_DETECTION
1172 /* If buffer becoming modified, lock the file.
1173 If buffer becoming unmodified, unlock the file. */
1175 fn
= BVAR (current_buffer
, file_truename
);
1176 /* Test buffer-file-name so that binding it to nil is effective. */
1177 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1179 int already
= SAVE_MODIFF
< MODIFF
;
1180 if (!already
&& !NILP (flag
))
1182 else if (already
&& NILP (flag
))
1185 #endif /* CLASH_DETECTION */
1187 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1191 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1193 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1194 Each buffer has a tick counter which is incremented each time the
1195 text in that buffer is changed. It wraps around occasionally.
1196 No argument or nil as argument means use current buffer as BUFFER. */)
1197 (register Lisp_Object buffer
)
1199 register struct buffer
*buf
;
1201 buf
= current_buffer
;
1204 CHECK_BUFFER (buffer
);
1205 buf
= XBUFFER (buffer
);
1208 return make_number (BUF_MODIFF (buf
));
1211 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1212 Sbuffer_chars_modified_tick
, 0, 1, 0,
1213 doc
: /* Return BUFFER's character-change tick counter.
1214 Each buffer has a character-change tick counter, which is set to the
1215 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1216 time text in that buffer is inserted or deleted. By comparing the
1217 values returned by two individual calls of `buffer-chars-modified-tick',
1218 you can tell whether a character change occurred in that buffer in
1219 between these calls. No argument or nil as argument means use current
1220 buffer as BUFFER. */)
1221 (register Lisp_Object buffer
)
1223 register struct buffer
*buf
;
1225 buf
= current_buffer
;
1228 CHECK_BUFFER (buffer
);
1229 buf
= XBUFFER (buffer
);
1232 return make_number (BUF_CHARS_MODIFF (buf
));
1235 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1236 "(list (read-string \"Rename buffer (to new name): \" \
1237 nil 'buffer-name-history (buffer-name (current-buffer))) \
1238 current-prefix-arg)",
1239 doc
: /* Change current buffer's name to NEWNAME (a string).
1240 If second arg UNIQUE is nil or omitted, it is an error if a
1241 buffer named NEWNAME already exists.
1242 If UNIQUE is non-nil, come up with a new name using
1243 `generate-new-buffer-name'.
1244 Interactively, you can set UNIQUE with a prefix argument.
1245 We return the name we actually gave the buffer.
1246 This does not change the name of the visited file (if any). */)
1247 (register Lisp_Object newname
, Lisp_Object unique
)
1249 register Lisp_Object tem
, buf
;
1251 CHECK_STRING (newname
);
1253 if (SCHARS (newname
) == 0)
1254 error ("Empty string is invalid as a buffer name");
1256 tem
= Fget_buffer (newname
);
1259 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1260 rename the buffer automatically so you can create another
1261 with the original name. It makes UNIQUE equivalent to
1262 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1263 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1264 return BVAR (current_buffer
, name
);
1266 newname
= Fgenerate_new_buffer_name (newname
, BVAR (current_buffer
, name
));
1268 error ("Buffer name `%s' is in use", SDATA (newname
));
1271 BVAR (current_buffer
, name
) = newname
;
1273 /* Catch redisplay's attention. Unless we do this, the mode lines for
1274 any windows displaying current_buffer will stay unchanged. */
1275 update_mode_lines
++;
1277 XSETBUFFER (buf
, current_buffer
);
1278 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1279 if (NILP (BVAR (current_buffer
, filename
))
1280 && !NILP (BVAR (current_buffer
, auto_save_file_name
)))
1281 call0 (intern ("rename-auto-save-file"));
1283 /* Run buffer-list-update-hook. */
1284 if (!NILP (Vrun_hooks
))
1285 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1287 /* Refetch since that last call may have done GC. */
1288 return BVAR (current_buffer
, name
);
1291 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1292 doc
: /* Return most recently selected buffer other than BUFFER.
1293 Buffers not visible in windows are preferred to visible buffers, unless
1294 optional second argument VISIBLE-OK is non-nil. Ignore the argument
1295 BUFFER unless it denotes a live buffer. If the optional third argument
1296 FRAME is non-nil, use that frame's buffer list instead of the selected
1297 frame's buffer list.
1299 The buffer is found by scanning the selected or specified frame's buffer
1300 list first, followed by the list of all buffers. If no other buffer
1301 exists, return the buffer `*scratch*' (creating it if necessary). */)
1302 (register Lisp_Object buffer
, Lisp_Object visible_ok
, Lisp_Object frame
)
1304 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1305 Lisp_Object tail
, buf
, pred
;
1306 Lisp_Object notsogood
= Qnil
;
1309 frame
= selected_frame
;
1311 CHECK_FRAME (frame
);
1313 pred
= frame_buffer_predicate (frame
);
1314 /* Consider buffers that have been seen in the frame first. */
1315 tail
= XFRAME (frame
)->buffer_list
;
1316 for (; CONSP (tail
); tail
= XCDR (tail
))
1319 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1320 && !NILP (BVAR (XBUFFER (buf
), name
))
1321 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1322 /* If the frame has a buffer_predicate, disregard buffers that
1323 don't fit the predicate. */
1324 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1326 if (!NILP (visible_ok
)
1327 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1329 else if (NILP (notsogood
))
1334 /* Consider alist of all buffers next. */
1335 tail
= Vbuffer_alist
;
1336 for (; CONSP (tail
); tail
= XCDR (tail
))
1338 buf
= Fcdr (XCAR (tail
));
1339 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1340 && !NILP (BVAR (XBUFFER (buf
), name
))
1341 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1342 /* If the frame has a buffer_predicate, disregard buffers that
1343 don't fit the predicate. */
1344 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1346 if (!NILP (visible_ok
)
1347 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1349 else if (NILP (notsogood
))
1354 if (!NILP (notsogood
))
1358 buf
= Fget_buffer (build_string ("*scratch*"));
1361 buf
= Fget_buffer_create (build_string ("*scratch*"));
1362 Fset_buffer_major_mode (buf
);
1368 /* The following function is a safe variant of Fother_buffer: It doesn't
1369 pay attention to any frame-local buffer lists, doesn't care about
1370 visibility of buffers, and doesn't evaluate any frame predicates. */
1373 other_buffer_safely (Lisp_Object buffer
)
1375 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1376 Lisp_Object tail
, buf
;
1378 tail
= Vbuffer_alist
;
1379 for (; CONSP (tail
); tail
= XCDR (tail
))
1381 buf
= Fcdr (XCAR (tail
));
1382 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1383 && !NILP (BVAR (XBUFFER (buf
), name
))
1384 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' '))
1388 buf
= Fget_buffer (build_string ("*scratch*"));
1391 buf
= Fget_buffer_create (build_string ("*scratch*"));
1392 Fset_buffer_major_mode (buf
);
1398 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1400 doc
: /* Start keeping undo information for buffer BUFFER.
1401 No argument or nil as argument means do this for the current buffer. */)
1402 (register Lisp_Object buffer
)
1404 Lisp_Object real_buffer
;
1407 XSETBUFFER (real_buffer
, current_buffer
);
1410 real_buffer
= Fget_buffer (buffer
);
1411 if (NILP (real_buffer
))
1415 if (EQ (BVAR (XBUFFER (real_buffer
), undo_list
), Qt
))
1416 BVAR (XBUFFER (real_buffer
), undo_list
) = Qnil
;
1422 DEFVAR_LISP ("kill-buffer-hook", ..., "\
1423 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1424 The buffer being killed will be current while the hook is running.\n\
1427 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1428 doc
: /* Kill buffer BUFFER-OR-NAME.
1429 The argument may be a buffer or the name of an existing buffer.
1430 Argument nil or omitted means kill the current buffer. Return t if the
1431 buffer is actually killed, nil otherwise.
1433 This function calls `replace-buffer-in-windows' for cleaning up all
1434 windows currently displaying the buffer to be killed. The functions in
1435 `kill-buffer-query-functions' are called with the buffer to be killed as
1436 the current buffer. If any of them returns nil, the buffer is not
1437 killed. The hook `kill-buffer-hook' is run before the buffer is
1438 actually killed. The buffer being killed will be current while the hook
1441 Any processes that have this buffer as the `process-buffer' are killed
1443 (Lisp_Object buffer_or_name
)
1446 register struct buffer
*b
;
1447 register Lisp_Object tem
;
1448 register struct Lisp_Marker
*m
;
1449 struct gcpro gcpro1
;
1451 if (NILP (buffer_or_name
))
1452 buffer
= Fcurrent_buffer ();
1454 buffer
= Fget_buffer (buffer_or_name
);
1456 nsberror (buffer_or_name
);
1458 b
= XBUFFER (buffer
);
1460 /* Avoid trouble for buffer already dead. */
1461 if (NILP (BVAR (b
, name
)))
1464 /* Query if the buffer is still modified. */
1465 if (INTERACTIVE
&& !NILP (BVAR (b
, filename
))
1466 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1469 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1470 BVAR (b
, name
), make_number (0)));
1476 /* Run hooks with the buffer to be killed the current buffer. */
1478 ptrdiff_t count
= SPECPDL_INDEX ();
1479 Lisp_Object arglist
[1];
1481 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1482 set_buffer_internal (b
);
1484 /* First run the query functions; if any query is answered no,
1485 don't kill the buffer. */
1486 arglist
[0] = Qkill_buffer_query_functions
;
1487 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1489 return unbind_to (count
, Qnil
);
1491 /* Then run the hooks. */
1492 Frun_hooks (1, &Qkill_buffer_hook
);
1493 unbind_to (count
, Qnil
);
1496 /* We have no more questions to ask. Verify that it is valid
1497 to kill the buffer. This must be done after the questions
1498 since anything can happen within do_yes_or_no_p. */
1500 /* Don't kill the minibuffer now current. */
1501 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1504 if (NILP (BVAR (b
, name
)))
1507 /* When we kill a base buffer, kill all its indirect buffers.
1508 We do it at this stage so nothing terrible happens if they
1509 ask questions or their hooks get errors. */
1510 if (! b
->base_buffer
)
1512 struct buffer
*other
;
1516 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
1517 /* all_buffers contains dead buffers too;
1518 don't re-kill them. */
1519 if (other
->base_buffer
== b
&& !NILP (BVAR (other
, name
)))
1522 XSETBUFFER (buf
, other
);
1529 /* Make this buffer not be current.
1530 In the process, notice if this is the sole visible buffer
1531 and give up if so. */
1532 if (b
== current_buffer
)
1534 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1536 if (b
== current_buffer
)
1540 /* Notice if the buffer to kill is the sole visible buffer
1541 when we're currently in the mini-buffer, and give up if so. */
1542 XSETBUFFER (tem
, current_buffer
);
1543 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1545 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1546 if (EQ (buffer
, tem
))
1550 /* Now there is no question: we can kill the buffer. */
1552 #ifdef CLASH_DETECTION
1553 /* Unlock this buffer's file, if it is locked. */
1555 #endif /* CLASH_DETECTION */
1558 kill_buffer_processes (buffer
);
1561 /* Killing buffer processes may run sentinels which may
1562 have called kill-buffer. */
1564 if (NILP (BVAR (b
, name
)))
1567 /* These may run Lisp code and into infinite loops (if someone
1568 insisted on circular lists) so allow quitting here. */
1569 replace_buffer_in_windows (buffer
);
1570 frames_discard_buffer (buffer
);
1572 clear_charpos_cache (b
);
1574 tem
= Vinhibit_quit
;
1576 /* Remove the buffer from the list of all buffers. */
1577 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1578 /* If replace_buffer_in_windows didn't do its job correctly fix that
1580 replace_buffer_in_windows_safely (buffer
);
1581 Vinhibit_quit
= tem
;
1583 /* Delete any auto-save file, if we saved it in this session.
1584 But not if the buffer is modified. */
1585 if (STRINGP (BVAR (b
, auto_save_file_name
))
1586 && BUF_AUTOSAVE_MODIFF (b
) != 0
1587 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1588 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1589 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1592 delete = Fsymbol_value (intern ("delete-auto-save-files"));
1593 if (! NILP (delete))
1594 internal_delete_file (BVAR (b
, auto_save_file_name
));
1599 /* Unchain all markers that belong to this indirect buffer.
1600 Don't unchain the markers that belong to the base buffer
1601 or its other indirect buffers. */
1602 for (m
= BUF_MARKERS (b
); m
; )
1604 struct Lisp_Marker
*next
= m
->next
;
1612 /* Unchain all markers of this buffer and its indirect buffers.
1613 and leave them pointing nowhere. */
1614 for (m
= BUF_MARKERS (b
); m
; )
1616 struct Lisp_Marker
*next
= m
->next
;
1621 BUF_MARKERS (b
) = NULL
;
1622 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1624 /* Perhaps we should explicitly free the interval tree here... */
1627 /* Reset the local variables, so that this buffer's local values
1628 won't be protected from GC. They would be protected
1629 if they happened to remain encached in their symbols.
1630 This gets rid of them for certain. */
1631 swap_out_buffer_local_variables (b
);
1632 reset_buffer_local_variables (b
, 1);
1634 BVAR (b
, name
) = Qnil
;
1637 if (! b
->base_buffer
)
1638 free_buffer_text (b
);
1640 if (b
->newline_cache
)
1642 free_region_cache (b
->newline_cache
);
1643 b
->newline_cache
= 0;
1645 if (b
->width_run_cache
)
1647 free_region_cache (b
->width_run_cache
);
1648 b
->width_run_cache
= 0;
1650 BVAR (b
, width_table
) = Qnil
;
1652 BVAR (b
, undo_list
) = Qnil
;
1654 /* Run buffer-list-update-hook. */
1655 if (!NILP (Vrun_hooks
))
1656 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1661 /* Move association for BUFFER to the front of buffer (a)lists. Since
1662 we do this each time BUFFER is selected visibly, the more recently
1663 selected buffers are always closer to the front of those lists. This
1664 means that other_buffer is more likely to choose a relevant buffer.
1666 Note that this moves BUFFER to the front of the buffer lists of the
1667 selected frame even if BUFFER is not shown there. If BUFFER is not
1668 shown in the selected frame, consider the present behavior a feature.
1669 `select-window' gets this right since it shows BUFFER in the selected
1670 window when calling us. */
1673 record_buffer (Lisp_Object buffer
)
1675 Lisp_Object aelt
, aelt_cons
, tem
;
1676 register struct frame
*f
= XFRAME (selected_frame
);
1678 CHECK_BUFFER (buffer
);
1680 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1681 Don't allow quitting since this might leave the buffer list in an
1682 inconsistent state. */
1683 tem
= Vinhibit_quit
;
1685 aelt
= Frassq (buffer
, Vbuffer_alist
);
1686 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1687 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1688 XSETCDR (aelt_cons
, Vbuffer_alist
);
1689 Vbuffer_alist
= aelt_cons
;
1690 Vinhibit_quit
= tem
;
1692 /* Update buffer list of selected frame. */
1693 f
->buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buffer_list
));
1694 f
->buried_buffer_list
= Fdelq (buffer
, f
->buried_buffer_list
);
1696 /* Run buffer-list-update-hook. */
1697 if (!NILP (Vrun_hooks
))
1698 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1702 /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
1703 buffer is killed. For the selected frame's buffer list this moves
1704 BUFFER to its end even if it was never shown in that frame. If
1705 this happens we have a feature, hence `unrecord-buffer' should be
1706 called only when BUFFER was shown in the selected frame. */
1708 DEFUN ("bury-buffer-internal", Fbury_buffer_internal
, Sbury_buffer_internal
,
1710 doc
: /* Move BUFFER to the end of the buffer list. */)
1711 (Lisp_Object buffer
)
1713 Lisp_Object aelt
, aelt_cons
, tem
;
1714 register struct frame
*f
= XFRAME (selected_frame
);
1716 CHECK_BUFFER (buffer
);
1718 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1719 Don't allow quitting since this might leave the buffer list in an
1720 inconsistent state. */
1721 tem
= Vinhibit_quit
;
1723 aelt
= Frassq (buffer
, Vbuffer_alist
);
1724 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1725 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1726 XSETCDR (aelt_cons
, Qnil
);
1727 Vbuffer_alist
= nconc2 (Vbuffer_alist
, aelt_cons
);
1728 Vinhibit_quit
= tem
;
1730 /* Update buffer lists of selected frame. */
1731 f
->buffer_list
= Fdelq (buffer
, f
->buffer_list
);
1732 f
->buried_buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buried_buffer_list
));
1734 /* Run buffer-list-update-hook. */
1735 if (!NILP (Vrun_hooks
))
1736 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1741 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1742 doc
: /* Set an appropriate major mode for BUFFER.
1743 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1744 according to `default-major-mode'.
1745 Use this function before selecting the buffer, since it may need to inspect
1746 the current buffer's major mode. */)
1747 (Lisp_Object buffer
)
1750 Lisp_Object function
;
1752 CHECK_BUFFER (buffer
);
1754 if (STRINGP (BVAR (XBUFFER (buffer
), name
))
1755 && strcmp (SSDATA (BVAR (XBUFFER (buffer
), name
)), "*scratch*") == 0)
1756 function
= find_symbol_value (intern ("initial-major-mode"));
1759 function
= BVAR (&buffer_defaults
, major_mode
);
1761 && NILP (Fget (BVAR (current_buffer
, major_mode
), Qmode_class
)))
1762 function
= BVAR (current_buffer
, major_mode
);
1765 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1768 count
= SPECPDL_INDEX ();
1770 /* To select a nonfundamental mode,
1771 select the buffer temporarily and then call the mode function. */
1773 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1775 Fset_buffer (buffer
);
1778 return unbind_to (count
, Qnil
);
1781 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1782 doc
: /* Return the current buffer as a Lisp object. */)
1785 register Lisp_Object buf
;
1786 XSETBUFFER (buf
, current_buffer
);
1790 /* Set the current buffer to B.
1792 We previously set windows_or_buffers_changed here to invalidate
1793 global unchanged information in beg_unchanged and end_unchanged.
1794 This is no longer necessary because we now compute unchanged
1795 information on a buffer-basis. Every action affecting other
1796 windows than the selected one requires a select_window at some
1797 time, and that increments windows_or_buffers_changed. */
1800 set_buffer_internal (register struct buffer
*b
)
1802 if (current_buffer
!= b
)
1803 set_buffer_internal_1 (b
);
1806 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1807 This is used by redisplay. */
1810 set_buffer_internal_1 (register struct buffer
*b
)
1812 register struct buffer
*old_buf
;
1813 register Lisp_Object tail
;
1815 #ifdef USE_MMAP_FOR_BUFFERS
1816 if (b
->text
->beg
== NULL
)
1817 enlarge_buffer_text (b
, 0);
1818 #endif /* USE_MMAP_FOR_BUFFERS */
1820 if (current_buffer
== b
)
1823 old_buf
= current_buffer
;
1825 last_known_column_point
= -1; /* invalidate indentation cache */
1829 /* Put the undo list back in the base buffer, so that it appears
1830 that an indirect buffer shares the undo list of its base. */
1831 if (old_buf
->base_buffer
)
1832 BVAR (old_buf
->base_buffer
, undo_list
) = BVAR (old_buf
, undo_list
);
1834 /* If the old current buffer has markers to record PT, BEGV and ZV
1835 when it is not current, update them now. */
1836 record_buffer_markers (old_buf
);
1839 /* Get the undo list from the base buffer, so that it appears
1840 that an indirect buffer shares the undo list of its base. */
1842 BVAR (b
, undo_list
) = BVAR (b
->base_buffer
, undo_list
);
1844 /* If the new current buffer has markers to record PT, BEGV and ZV
1845 when it is not current, fetch them now. */
1846 fetch_buffer_markers (b
);
1848 /* Look down buffer's list of local Lisp variables
1849 to find and update any that forward into C variables. */
1853 for (tail
= BVAR (b
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1855 Lisp_Object var
= XCAR (XCAR (tail
));
1856 struct Lisp_Symbol
*sym
= XSYMBOL (var
);
1857 if (sym
->redirect
== SYMBOL_LOCALIZED
/* Just to be sure. */
1858 && SYMBOL_BLV (sym
)->fwd
)
1859 /* Just reference the variable
1860 to cause it to become set for this buffer. */
1861 Fsymbol_value (var
);
1864 /* Do the same with any others that were local to the previous buffer */
1865 while (b
!= old_buf
&& (b
= old_buf
, b
));
1868 /* Switch to buffer B temporarily for redisplay purposes.
1869 This avoids certain things that don't need to be done within redisplay. */
1872 set_buffer_temp (struct buffer
*b
)
1874 register struct buffer
*old_buf
;
1876 if (current_buffer
== b
)
1879 old_buf
= current_buffer
;
1882 /* If the old current buffer has markers to record PT, BEGV and ZV
1883 when it is not current, update them now. */
1884 record_buffer_markers (old_buf
);
1886 /* If the new current buffer has markers to record PT, BEGV and ZV
1887 when it is not current, fetch them now. */
1888 fetch_buffer_markers (b
);
1891 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1892 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
1893 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
1894 also `save-excursion' when you want to make a buffer current
1895 temporarily. This function does not display the buffer, so its effect
1896 ends when the current command terminates. Use `switch-to-buffer' or
1897 `pop-to-buffer' to switch buffers permanently. */)
1898 (register Lisp_Object buffer_or_name
)
1900 register Lisp_Object buffer
;
1901 buffer
= Fget_buffer (buffer_or_name
);
1903 nsberror (buffer_or_name
);
1904 if (NILP (BVAR (XBUFFER (buffer
), name
)))
1905 error ("Selecting deleted buffer");
1906 set_buffer_internal (XBUFFER (buffer
));
1910 /* Set the current buffer to BUFFER provided it is alive. */
1913 set_buffer_if_live (Lisp_Object buffer
)
1915 if (! NILP (BVAR (XBUFFER (buffer
), name
)))
1916 Fset_buffer (buffer
);
1920 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1921 Sbarf_if_buffer_read_only
, 0, 0, 0,
1922 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1925 if (!NILP (BVAR (current_buffer
, read_only
))
1926 && NILP (Vinhibit_read_only
))
1927 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
1931 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1932 doc
: /* Delete the entire contents of the current buffer.
1933 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1934 so the buffer is truly empty after this. */)
1941 current_buffer
->last_window_start
= 1;
1942 /* Prevent warnings, or suspension of auto saving, that would happen
1943 if future size is less than past size. Use of erase-buffer
1944 implies that the future text is not really related to the past text. */
1945 XSETFASTINT (BVAR (current_buffer
, save_length
), 0);
1950 validate_region (register Lisp_Object
*b
, register Lisp_Object
*e
)
1952 CHECK_NUMBER_COERCE_MARKER (*b
);
1953 CHECK_NUMBER_COERCE_MARKER (*e
);
1955 if (XINT (*b
) > XINT (*e
))
1958 tem
= *b
; *b
= *e
; *e
= tem
;
1961 if (! (BEGV
<= XINT (*b
) && XINT (*e
) <= ZV
))
1962 args_out_of_range (*b
, *e
);
1965 /* Advance BYTE_POS up to a character boundary
1966 and return the adjusted position. */
1969 advance_to_char_boundary (ptrdiff_t byte_pos
)
1973 if (byte_pos
== BEG
)
1974 /* Beginning of buffer is always a character boundary. */
1977 c
= FETCH_BYTE (byte_pos
);
1978 if (! CHAR_HEAD_P (c
))
1980 /* We should advance BYTE_POS only when C is a constituent of a
1981 multibyte sequence. */
1982 ptrdiff_t orig_byte_pos
= byte_pos
;
1987 c
= FETCH_BYTE (byte_pos
);
1989 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
1991 if (byte_pos
< orig_byte_pos
)
1992 byte_pos
= orig_byte_pos
;
1993 /* If C is a constituent of a multibyte sequence, BYTE_POS was
1994 surely advance to the correct character boundary. If C is
1995 not, BYTE_POS was unchanged. */
2002 extern void r_alloc_reset_variable (POINTER_TYPE
*, POINTER_TYPE
*);
2003 #endif /* REL_ALLOC */
2005 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2007 doc
: /* Swap the text between current buffer and BUFFER. */)
2008 (Lisp_Object buffer
)
2010 struct buffer
*other_buffer
;
2011 CHECK_BUFFER (buffer
);
2012 other_buffer
= XBUFFER (buffer
);
2014 if (NILP (BVAR (other_buffer
, name
)))
2015 error ("Cannot swap a dead buffer's text");
2017 /* Actually, it probably works just fine.
2018 * if (other_buffer == current_buffer)
2019 * error ("Cannot swap a buffer's text with itself"); */
2021 /* Actually, this may be workable as well, tho probably only if they're
2023 if (other_buffer
->base_buffer
2024 || current_buffer
->base_buffer
)
2025 error ("Cannot swap indirect buffers's text");
2027 { /* This is probably harder to make work. */
2028 struct buffer
*other
;
2029 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2030 if (other
->base_buffer
== other_buffer
2031 || other
->base_buffer
== current_buffer
)
2032 error ("One of the buffers to swap has indirect buffers");
2035 #define swapfield(field, type) \
2037 type tmp##field = other_buffer->field; \
2038 other_buffer->field = current_buffer->field; \
2039 current_buffer->field = tmp##field; \
2041 #define swapfield_(field, type) \
2043 type tmp##field = BVAR (other_buffer, field); \
2044 BVAR (other_buffer, field) = BVAR (current_buffer, field); \
2045 BVAR (current_buffer, field) = tmp##field; \
2048 swapfield (own_text
, struct buffer_text
);
2049 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2050 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2052 r_alloc_reset_variable ((POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
,
2053 (POINTER_TYPE
**) &other_buffer
->own_text
.beg
);
2054 r_alloc_reset_variable ((POINTER_TYPE
**) &other_buffer
->own_text
.beg
,
2055 (POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
);
2056 #endif /* REL_ALLOC */
2058 swapfield (pt
, ptrdiff_t);
2059 swapfield (pt_byte
, ptrdiff_t);
2060 swapfield (begv
, ptrdiff_t);
2061 swapfield (begv_byte
, ptrdiff_t);
2062 swapfield (zv
, ptrdiff_t);
2063 swapfield (zv_byte
, ptrdiff_t);
2064 eassert (!current_buffer
->base_buffer
);
2065 eassert (!other_buffer
->base_buffer
);
2066 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2067 swapfield (newline_cache
, struct region_cache
*);
2068 swapfield (width_run_cache
, struct region_cache
*);
2069 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2070 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2071 swapfield (overlays_before
, struct Lisp_Overlay
*);
2072 swapfield (overlays_after
, struct Lisp_Overlay
*);
2073 swapfield (overlay_center
, ptrdiff_t);
2074 swapfield_ (undo_list
, Lisp_Object
);
2075 swapfield_ (mark
, Lisp_Object
);
2076 swapfield_ (enable_multibyte_characters
, Lisp_Object
);
2077 swapfield_ (bidi_display_reordering
, Lisp_Object
);
2078 swapfield_ (bidi_paragraph_direction
, Lisp_Object
);
2079 /* FIXME: Not sure what we should do with these *_marker fields.
2080 Hopefully they're just nil anyway. */
2081 swapfield_ (pt_marker
, Lisp_Object
);
2082 swapfield_ (begv_marker
, Lisp_Object
);
2083 swapfield_ (zv_marker
, Lisp_Object
);
2084 BVAR (current_buffer
, point_before_scroll
) = Qnil
;
2085 BVAR (other_buffer
, point_before_scroll
) = Qnil
;
2087 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2088 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2089 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2090 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2091 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2092 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2093 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2095 struct Lisp_Marker
*m
;
2096 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2097 if (m
->buffer
== other_buffer
)
2098 m
->buffer
= current_buffer
;
2100 /* Since there's no indirect buffer in sight, markers on
2101 BUF_MARKERS(buf) should either be for `buf' or dead. */
2102 eassert (!m
->buffer
);
2103 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2104 if (m
->buffer
== current_buffer
)
2105 m
->buffer
= other_buffer
;
2107 /* Since there's no indirect buffer in sight, markers on
2108 BUF_MARKERS(buf) should either be for `buf' or dead. */
2109 eassert (!m
->buffer
);
2111 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2112 So since we just swapped the markers between the two buffers, we need
2113 to undo the effect of this swap for window markers. */
2114 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2115 Lisp_Object buf1
, buf2
;
2116 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2118 while (NILP (Fmemq (w
, ws
)))
2121 if (MARKERP (XWINDOW (w
)->pointm
)
2122 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2123 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2124 Fset_marker (XWINDOW (w
)->pointm
,
2125 make_number (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2126 XWINDOW (w
)->buffer
);
2127 w
= Fnext_window (w
, Qt
, Qt
);
2131 if (current_buffer
->text
->intervals
)
2132 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2133 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2134 if (other_buffer
->text
->intervals
)
2135 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2136 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2141 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2143 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2144 If FLAG is t, this makes the buffer a multibyte buffer.
2145 If FLAG is nil, this makes the buffer a single-byte buffer.
2146 In these cases, the buffer contents remain unchanged as a sequence of
2147 bytes but the contents viewed as characters do change.
2148 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2149 all eight-bit bytes to eight-bit characters.
2150 If the multibyte flag was really changed, undo information of the
2151 current buffer is cleared. */)
2154 struct Lisp_Marker
*tail
, *markers
;
2155 struct buffer
*other
;
2157 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2158 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2159 Lisp_Object old_undo
= BVAR (current_buffer
, undo_list
);
2160 struct gcpro gcpro1
;
2162 if (current_buffer
->base_buffer
)
2163 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2165 /* Do nothing if nothing actually changes. */
2166 if (NILP (flag
) == NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2171 /* Don't record these buffer changes. We will put a special undo entry
2173 BVAR (current_buffer
, undo_list
) = Qt
;
2175 /* If the cached position is for this buffer, clear it out. */
2176 clear_charpos_cache (current_buffer
);
2179 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2181 begv
= BEGV
, zv
= ZV
;
2188 ptrdiff_t pos
, stop
;
2191 /* Do this first, so it can use CHAR_TO_BYTE
2192 to calculate the old correspondences. */
2193 set_intervals_multibyte (0);
2195 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
2201 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2204 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2205 tail
->charpos
= tail
->bytepos
;
2207 /* Convert multibyte form of 8-bit characters to unibyte. */
2222 if (ASCII_BYTE_P (*p
))
2224 else if (CHAR_BYTE8_HEAD_P (*p
))
2226 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2227 /* Delete all bytes for this 8-bit character but the
2228 last one, and change the last one to the character
2231 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2243 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2244 p
+= bytes
, pos
+= bytes
;
2248 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2253 ptrdiff_t pos
, stop
;
2254 unsigned char *p
, *pend
;
2256 /* Be sure not to have a multibyte sequence striding over the GAP.
2257 Ex: We change this: "...abc\302 _GAP_ \241def..."
2258 to: "...abc _GAP_ \302\241def..." */
2261 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2262 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2264 unsigned char *q
= GPT_ADDR
- 1;
2266 while (! CHAR_HEAD_P (*q
) && q
> BEG_ADDR
) q
--;
2267 if (LEADING_CODE_P (*q
))
2269 ptrdiff_t new_gpt
= GPT_BYTE
- (GPT_ADDR
- q
);
2271 move_gap_both (new_gpt
, new_gpt
);
2275 /* Make the buffer contents valid as multibyte by converting
2276 8-bit characters to multibyte form. */
2294 if (ASCII_BYTE_P (*p
))
2296 else if (EQ (flag
, Qt
)
2297 && ! CHAR_BYTE8_HEAD_P (*p
)
2298 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2299 p
+= bytes
, pos
+= bytes
;
2302 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2305 c
= BYTE8_TO_CHAR (*p
);
2306 bytes
= CHAR_STRING (c
, tmp
);
2308 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2310 insert_1_both ((char *) tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2311 /* Now the gap is after the just inserted data. */
2329 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2331 /* Do this first, so that chars_in_text asks the right question.
2332 set_intervals_multibyte needs it too. */
2333 BVAR (current_buffer
, enable_multibyte_characters
) = Qt
;
2335 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2336 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2338 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2340 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2341 if (BEGV_BYTE
> GPT_BYTE
)
2342 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2344 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2346 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2347 if (ZV_BYTE
> GPT_BYTE
)
2348 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2350 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2353 ptrdiff_t byte
= advance_to_char_boundary (PT_BYTE
);
2356 if (byte
> GPT_BYTE
)
2357 position
= chars_in_text (GAP_END_ADDR
, byte
- GPT_BYTE
) + GPT
;
2359 position
= chars_in_text (BEG_ADDR
, byte
- BEG_BYTE
) + BEG
;
2360 TEMP_SET_PT_BOTH (position
, byte
);
2363 tail
= markers
= BUF_MARKERS (current_buffer
);
2365 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2366 getting confused by the markers that have not yet been updated.
2367 It is also a signal that it should never create a marker. */
2368 BUF_MARKERS (current_buffer
) = NULL
;
2370 for (; tail
; tail
= tail
->next
)
2372 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2373 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2376 /* Make sure no markers were put on the chain
2377 while the chain value was incorrect. */
2378 if (BUF_MARKERS (current_buffer
))
2381 BUF_MARKERS (current_buffer
) = markers
;
2383 /* Do this last, so it can calculate the new correspondences
2384 between chars and bytes. */
2385 set_intervals_multibyte (1);
2388 if (!EQ (old_undo
, Qt
))
2390 /* Represent all the above changes by a special undo entry. */
2391 BVAR (current_buffer
, undo_list
) = Fcons (list3 (Qapply
,
2392 intern ("set-buffer-multibyte"),
2393 NILP (flag
) ? Qt
: Qnil
),
2399 /* Changing the multibyteness of a buffer means that all windows
2400 showing that buffer must be updated thoroughly. */
2401 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2402 ++windows_or_buffers_changed
;
2404 /* Copy this buffer's new multibyte status
2405 into all of its indirect buffers. */
2406 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2407 if (other
->base_buffer
== current_buffer
&& !NILP (BVAR (other
, name
)))
2409 BVAR (other
, enable_multibyte_characters
)
2410 = BVAR (current_buffer
, enable_multibyte_characters
);
2411 other
->prevent_redisplay_optimizations_p
= 1;
2414 /* Restore the modifiedness of the buffer. */
2415 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2416 Fset_buffer_modified_p (Qnil
);
2418 /* Update coding systems of this buffer's process (if any). */
2420 Lisp_Object process
;
2422 process
= Fget_buffer_process (Fcurrent_buffer ());
2423 if (PROCESSP (process
))
2424 setup_process_coding_systems (process
);
2430 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
,
2431 Skill_all_local_variables
, 0, 0, 0,
2432 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2433 Most local variable bindings are eliminated so that the default values
2434 become effective once more. Also, the syntax table is set from
2435 `standard-syntax-table', the local keymap is set to nil,
2436 and the abbrev table from `fundamental-mode-abbrev-table'.
2437 This function also forces redisplay of the mode line.
2439 Every function to select a new major mode starts by
2440 calling this function.
2442 As a special exception, local variables whose names have
2443 a non-nil `permanent-local' property are not eliminated by this function.
2445 The first thing this function does is run
2446 the normal hook `change-major-mode-hook'. */)
2449 Frun_hooks (1, &Qchange_major_mode_hook
);
2451 /* Make sure none of the bindings in local_var_alist
2452 remain swapped in, in their symbols. */
2454 swap_out_buffer_local_variables (current_buffer
);
2456 /* Actually eliminate all local bindings of this buffer. */
2458 reset_buffer_local_variables (current_buffer
, 0);
2460 /* Force mode-line redisplay. Useful here because all major mode
2461 commands call this function. */
2462 update_mode_lines
++;
2467 /* Make sure no local variables remain set up with buffer B
2468 for their current values. */
2471 swap_out_buffer_local_variables (struct buffer
*b
)
2473 Lisp_Object oalist
, alist
, buffer
;
2475 XSETBUFFER (buffer
, b
);
2476 oalist
= BVAR (b
, local_var_alist
);
2478 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2480 Lisp_Object sym
= XCAR (XCAR (alist
));
2481 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2482 /* Need not do anything if some other buffer's binding is
2484 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2486 /* Symbol is set up for this buffer's old local value:
2488 swap_in_global_binding (XSYMBOL (sym
));
2493 /* Find all the overlays in the current buffer that contain position POS.
2494 Return the number found, and store them in a vector in *VEC_PTR.
2495 Store in *LEN_PTR the size allocated for the vector.
2496 Store in *NEXT_PTR the next position after POS where an overlay starts,
2497 or ZV if there are no more overlays between POS and ZV.
2498 Store in *PREV_PTR the previous position before POS where an overlay ends,
2499 or where an overlay starts which ends at or after POS;
2500 or BEGV if there are no such overlays from BEGV to POS.
2501 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2503 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2504 when this function is called.
2506 If EXTEND is non-zero, we make the vector bigger if necessary.
2507 If EXTEND is zero, we never extend the vector,
2508 and we store only as many overlays as will fit.
2509 But we still return the total number of overlays.
2511 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2512 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2513 default (BEGV or ZV). */
2516 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
,
2518 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
, int change_req
)
2520 Lisp_Object overlay
, start
, end
;
2521 struct Lisp_Overlay
*tail
;
2523 ptrdiff_t len
= *len_ptr
;
2524 Lisp_Object
*vec
= *vec_ptr
;
2525 ptrdiff_t next
= ZV
;
2526 ptrdiff_t prev
= BEGV
;
2527 int inhibit_storing
= 0;
2529 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2531 ptrdiff_t startpos
, endpos
;
2533 XSETMISC (overlay
, tail
);
2535 start
= OVERLAY_START (overlay
);
2536 end
= OVERLAY_END (overlay
);
2537 endpos
= OVERLAY_POSITION (end
);
2544 startpos
= OVERLAY_POSITION (start
);
2545 /* This one ends at or after POS
2546 so its start counts for PREV_PTR if it's before POS. */
2547 if (prev
< startpos
&& startpos
< pos
)
2551 if (startpos
<= pos
)
2555 /* The supplied vector is full.
2556 Either make it bigger, or don't store any more in it. */
2559 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2565 inhibit_storing
= 1;
2568 if (!inhibit_storing
)
2570 /* Keep counting overlays even if we can't return them all. */
2573 else if (startpos
< next
)
2577 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2579 ptrdiff_t startpos
, endpos
;
2581 XSETMISC (overlay
, tail
);
2583 start
= OVERLAY_START (overlay
);
2584 end
= OVERLAY_END (overlay
);
2585 startpos
= OVERLAY_POSITION (start
);
2588 if (startpos
< next
)
2592 endpos
= OVERLAY_POSITION (end
);
2599 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2605 inhibit_storing
= 1;
2608 if (!inhibit_storing
)
2612 if (startpos
< pos
&& startpos
> prev
)
2615 else if (endpos
< pos
&& endpos
> prev
)
2617 else if (endpos
== pos
&& startpos
> prev
2618 && (!change_req
|| startpos
< pos
))
2629 /* Find all the overlays in the current buffer that overlap the range
2630 BEG-END, or are empty at BEG, or are empty at END provided END
2631 denotes the position at the end of the current buffer.
2633 Return the number found, and store them in a vector in *VEC_PTR.
2634 Store in *LEN_PTR the size allocated for the vector.
2635 Store in *NEXT_PTR the next position after POS where an overlay starts,
2636 or ZV if there are no more overlays.
2637 Store in *PREV_PTR the previous position before POS where an overlay ends,
2638 or BEGV if there are no previous overlays.
2639 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2641 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2642 when this function is called.
2644 If EXTEND is non-zero, we make the vector bigger if necessary.
2645 If EXTEND is zero, we never extend the vector,
2646 and we store only as many overlays as will fit.
2647 But we still return the total number of overlays. */
2650 overlays_in (EMACS_INT beg
, EMACS_INT end
, int extend
,
2651 Lisp_Object
**vec_ptr
, ptrdiff_t *len_ptr
,
2652 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
)
2654 Lisp_Object overlay
, ostart
, oend
;
2655 struct Lisp_Overlay
*tail
;
2657 ptrdiff_t len
= *len_ptr
;
2658 Lisp_Object
*vec
= *vec_ptr
;
2659 ptrdiff_t next
= ZV
;
2660 ptrdiff_t prev
= BEGV
;
2661 int inhibit_storing
= 0;
2662 int end_is_Z
= end
== Z
;
2664 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2666 ptrdiff_t startpos
, endpos
;
2668 XSETMISC (overlay
, tail
);
2670 ostart
= OVERLAY_START (overlay
);
2671 oend
= OVERLAY_END (overlay
);
2672 endpos
= OVERLAY_POSITION (oend
);
2679 startpos
= OVERLAY_POSITION (ostart
);
2680 /* Count an interval if it overlaps the range, is empty at the
2681 start of the range, or is empty at END provided END denotes the
2682 end of the buffer. */
2683 if ((beg
< endpos
&& startpos
< end
)
2684 || (startpos
== endpos
2685 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2689 /* The supplied vector is full.
2690 Either make it bigger, or don't store any more in it. */
2693 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2699 inhibit_storing
= 1;
2702 if (!inhibit_storing
)
2704 /* Keep counting overlays even if we can't return them all. */
2707 else if (startpos
< next
)
2711 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2713 ptrdiff_t startpos
, endpos
;
2715 XSETMISC (overlay
, tail
);
2717 ostart
= OVERLAY_START (overlay
);
2718 oend
= OVERLAY_END (overlay
);
2719 startpos
= OVERLAY_POSITION (ostart
);
2722 if (startpos
< next
)
2726 endpos
= OVERLAY_POSITION (oend
);
2727 /* Count an interval if it overlaps the range, is empty at the
2728 start of the range, or is empty at END provided END denotes the
2729 end of the buffer. */
2730 if ((beg
< endpos
&& startpos
< end
)
2731 || (startpos
== endpos
2732 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2738 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2744 inhibit_storing
= 1;
2747 if (!inhibit_storing
)
2751 else if (endpos
< beg
&& endpos
> prev
)
2763 /* Return non-zero if there exists an overlay with a non-nil
2764 `mouse-face' property overlapping OVERLAY. */
2767 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2769 ptrdiff_t start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2770 ptrdiff_t end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2771 ptrdiff_t n
, i
, size
;
2772 Lisp_Object
*v
, tem
;
2775 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2776 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2779 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2780 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2783 for (i
= 0; i
< n
; ++i
)
2784 if (!EQ (v
[i
], overlay
)
2785 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2794 /* Fast function to just test if we're at an overlay boundary. */
2796 overlay_touches_p (ptrdiff_t pos
)
2798 Lisp_Object overlay
;
2799 struct Lisp_Overlay
*tail
;
2801 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2805 XSETMISC (overlay
,tail
);
2806 if (!OVERLAYP (overlay
))
2809 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2812 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2816 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2820 XSETMISC (overlay
, tail
);
2821 if (!OVERLAYP (overlay
))
2824 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2827 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2835 Lisp_Object overlay
;
2841 compare_overlays (const void *v1
, const void *v2
)
2843 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2844 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2845 if (s1
->priority
!= s2
->priority
)
2846 return s1
->priority
< s2
->priority
? -1 : 1;
2847 if (s1
->beg
!= s2
->beg
)
2848 return s1
->beg
< s2
->beg
? -1 : 1;
2849 if (s1
->end
!= s2
->end
)
2850 return s2
->end
< s1
->end
? -1 : 1;
2854 /* Sort an array of overlays by priority. The array is modified in place.
2855 The return value is the new size; this may be smaller than the original
2856 size if some of the overlays were invalid or were window-specific. */
2858 sort_overlays (Lisp_Object
*overlay_vec
, ptrdiff_t noverlays
, struct window
*w
)
2861 struct sortvec
*sortvec
;
2862 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2864 /* Put the valid and relevant overlays into sortvec. */
2866 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2869 Lisp_Object overlay
;
2871 overlay
= overlay_vec
[i
];
2872 if (OVERLAY_VALID (overlay
)
2873 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2874 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2876 /* If we're interested in a specific window, then ignore
2877 overlays that are limited to some other window. */
2882 window
= Foverlay_get (overlay
, Qwindow
);
2883 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2887 /* This overlay is good and counts: put it into sortvec. */
2888 sortvec
[j
].overlay
= overlay
;
2889 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2890 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2891 tem
= Foverlay_get (overlay
, Qpriority
);
2893 sortvec
[j
].priority
= XINT (tem
);
2895 sortvec
[j
].priority
= 0;
2901 /* Sort the overlays into the proper order: increasing priority. */
2904 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2906 for (i
= 0; i
< noverlays
; i
++)
2907 overlay_vec
[i
] = sortvec
[i
].overlay
;
2913 Lisp_Object string
, string2
;
2920 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2921 ptrdiff_t size
; /* Allocated length of that array. */
2922 ptrdiff_t used
; /* How much of the array is currently in use. */
2923 ptrdiff_t bytes
; /* Total length of the strings in buf. */
2926 /* Buffers for storing information about the overlays touching a given
2927 position. These could be automatic variables in overlay_strings, but
2928 it's more efficient to hold onto the memory instead of repeatedly
2929 allocating and freeing it. */
2930 static struct sortstrlist overlay_heads
, overlay_tails
;
2931 static unsigned char *overlay_str_buf
;
2933 /* Allocated length of overlay_str_buf. */
2934 static ptrdiff_t overlay_str_len
;
2936 /* A comparison function suitable for passing to qsort. */
2938 cmp_for_strings (const void *as1
, const void *as2
)
2940 struct sortstr
*s1
= (struct sortstr
*)as1
;
2941 struct sortstr
*s2
= (struct sortstr
*)as2
;
2942 if (s1
->size
!= s2
->size
)
2943 return s2
->size
< s1
->size
? -1 : 1;
2944 if (s1
->priority
!= s2
->priority
)
2945 return s1
->priority
< s2
->priority
? -1 : 1;
2950 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
,
2951 Lisp_Object str2
, Lisp_Object pri
, ptrdiff_t size
)
2955 if (ssl
->used
== ssl
->size
)
2956 ssl
->buf
= xpalloc (ssl
->buf
, &ssl
->size
, 5, -1, sizeof *ssl
->buf
);
2957 ssl
->buf
[ssl
->used
].string
= str
;
2958 ssl
->buf
[ssl
->used
].string2
= str2
;
2959 ssl
->buf
[ssl
->used
].size
= size
;
2960 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2963 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2964 nbytes
= SCHARS (str
);
2965 else if (! STRING_MULTIBYTE (str
))
2966 nbytes
= count_size_as_multibyte (SDATA (str
),
2969 nbytes
= SBYTES (str
);
2971 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
2972 memory_full (SIZE_MAX
);
2973 ssl
->bytes
+= nbytes
;
2977 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2978 nbytes
= SCHARS (str2
);
2979 else if (! STRING_MULTIBYTE (str2
))
2980 nbytes
= count_size_as_multibyte (SDATA (str2
),
2983 nbytes
= SBYTES (str2
);
2985 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
2986 memory_full (SIZE_MAX
);
2987 ssl
->bytes
+= nbytes
;
2991 /* Return the concatenation of the strings associated with overlays that
2992 begin or end at POS, ignoring overlays that are specific to a window
2993 other than W. The strings are concatenated in the appropriate order:
2994 shorter overlays nest inside longer ones, and higher priority inside
2995 lower. Normally all of the after-strings come first, but zero-sized
2996 overlays have their after-strings ride along with the before-strings
2997 because it would look strange to print them inside-out.
2999 Returns the string length, and stores the contents indirectly through
3000 PSTR, if that variable is non-null. The string may be overwritten by
3001 subsequent calls. */
3004 overlay_strings (ptrdiff_t pos
, struct window
*w
, unsigned char **pstr
)
3006 Lisp_Object overlay
, window
, str
;
3007 struct Lisp_Overlay
*ov
;
3008 ptrdiff_t startpos
, endpos
;
3009 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3011 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3012 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3013 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3015 XSETMISC (overlay
, ov
);
3016 eassert (OVERLAYP (overlay
));
3018 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3019 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3022 if (endpos
!= pos
&& startpos
!= pos
)
3024 window
= Foverlay_get (overlay
, Qwindow
);
3025 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3028 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3029 record_overlay_string (&overlay_heads
, str
,
3031 ? Foverlay_get (overlay
, Qafter_string
)
3033 Foverlay_get (overlay
, Qpriority
),
3035 else if (endpos
== pos
3036 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3037 record_overlay_string (&overlay_tails
, str
, Qnil
,
3038 Foverlay_get (overlay
, Qpriority
),
3041 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3043 XSETMISC (overlay
, ov
);
3044 eassert (OVERLAYP (overlay
));
3046 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3047 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3050 if (endpos
!= pos
&& startpos
!= pos
)
3052 window
= Foverlay_get (overlay
, Qwindow
);
3053 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3056 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3057 record_overlay_string (&overlay_heads
, str
,
3059 ? Foverlay_get (overlay
, Qafter_string
)
3061 Foverlay_get (overlay
, Qpriority
),
3063 else if (endpos
== pos
3064 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3065 record_overlay_string (&overlay_tails
, str
, Qnil
,
3066 Foverlay_get (overlay
, Qpriority
),
3069 if (overlay_tails
.used
> 1)
3070 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3072 if (overlay_heads
.used
> 1)
3073 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3075 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3082 if (INT_ADD_OVERFLOW (overlay_heads
.bytes
, overlay_tails
.bytes
))
3083 memory_full (SIZE_MAX
);
3084 total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3085 if (total
> overlay_str_len
)
3086 overlay_str_buf
= xpalloc (overlay_str_buf
, &overlay_str_len
,
3087 total
- overlay_str_len
, -1, 1);
3089 p
= overlay_str_buf
;
3090 for (i
= overlay_tails
.used
; --i
>= 0;)
3093 tem
= overlay_tails
.buf
[i
].string
;
3094 nbytes
= copy_text (SDATA (tem
), p
,
3096 STRING_MULTIBYTE (tem
), multibyte
);
3099 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3102 tem
= overlay_heads
.buf
[i
].string
;
3103 nbytes
= copy_text (SDATA (tem
), p
,
3105 STRING_MULTIBYTE (tem
), multibyte
);
3107 tem
= overlay_heads
.buf
[i
].string2
;
3110 nbytes
= copy_text (SDATA (tem
), p
,
3112 STRING_MULTIBYTE (tem
), multibyte
);
3116 if (p
!= overlay_str_buf
+ total
)
3119 *pstr
= overlay_str_buf
;
3125 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3128 recenter_overlay_lists (struct buffer
*buf
, ptrdiff_t pos
)
3130 Lisp_Object overlay
, beg
, end
;
3131 struct Lisp_Overlay
*prev
, *tail
, *next
;
3133 /* See if anything in overlays_before should move to overlays_after. */
3135 /* We don't strictly need prev in this loop; it should always be nil.
3136 But we use it for symmetry and in case that should cease to be true
3137 with some future change. */
3139 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3142 XSETMISC (overlay
, tail
);
3144 /* If the overlay is not valid, get rid of it. */
3145 if (!OVERLAY_VALID (overlay
))
3150 /* Splice the cons cell TAIL out of overlays_before. */
3154 buf
->overlays_before
= next
;
3160 beg
= OVERLAY_START (overlay
);
3161 end
= OVERLAY_END (overlay
);
3163 if (OVERLAY_POSITION (end
) > pos
)
3165 /* OVERLAY needs to be moved. */
3166 ptrdiff_t where
= OVERLAY_POSITION (beg
);
3167 struct Lisp_Overlay
*other
, *other_prev
;
3169 /* Splice the cons cell TAIL out of overlays_before. */
3173 buf
->overlays_before
= next
;
3175 /* Search thru overlays_after for where to put it. */
3177 for (other
= buf
->overlays_after
; other
;
3178 other_prev
= other
, other
= other
->next
)
3180 Lisp_Object otherbeg
, otheroverlay
;
3182 XSETMISC (otheroverlay
, other
);
3183 eassert (OVERLAY_VALID (otheroverlay
));
3185 otherbeg
= OVERLAY_START (otheroverlay
);
3186 if (OVERLAY_POSITION (otherbeg
) >= where
)
3190 /* Add TAIL to overlays_after before OTHER. */
3193 other_prev
->next
= tail
;
3195 buf
->overlays_after
= tail
;
3199 /* We've reached the things that should stay in overlays_before.
3200 All the rest of overlays_before must end even earlier,
3205 /* See if anything in overlays_after should be in overlays_before. */
3207 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3210 XSETMISC (overlay
, tail
);
3212 /* If the overlay is not valid, get rid of it. */
3213 if (!OVERLAY_VALID (overlay
))
3218 /* Splice the cons cell TAIL out of overlays_after. */
3222 buf
->overlays_after
= next
;
3228 beg
= OVERLAY_START (overlay
);
3229 end
= OVERLAY_END (overlay
);
3231 /* Stop looking, when we know that nothing further
3232 can possibly end before POS. */
3233 if (OVERLAY_POSITION (beg
) > pos
)
3236 if (OVERLAY_POSITION (end
) <= pos
)
3238 /* OVERLAY needs to be moved. */
3239 ptrdiff_t where
= OVERLAY_POSITION (end
);
3240 struct Lisp_Overlay
*other
, *other_prev
;
3242 /* Splice the cons cell TAIL out of overlays_after. */
3246 buf
->overlays_after
= next
;
3248 /* Search thru overlays_before for where to put it. */
3250 for (other
= buf
->overlays_before
; other
;
3251 other_prev
= other
, other
= other
->next
)
3253 Lisp_Object otherend
, otheroverlay
;
3255 XSETMISC (otheroverlay
, other
);
3256 eassert (OVERLAY_VALID (otheroverlay
));
3258 otherend
= OVERLAY_END (otheroverlay
);
3259 if (OVERLAY_POSITION (otherend
) <= where
)
3263 /* Add TAIL to overlays_before before OTHER. */
3266 other_prev
->next
= tail
;
3268 buf
->overlays_before
= tail
;
3273 buf
->overlay_center
= pos
;
3277 adjust_overlays_for_insert (ptrdiff_t pos
, ptrdiff_t length
)
3279 /* After an insertion, the lists are still sorted properly,
3280 but we may need to update the value of the overlay center. */
3281 if (current_buffer
->overlay_center
>= pos
)
3282 current_buffer
->overlay_center
+= length
;
3286 adjust_overlays_for_delete (ptrdiff_t pos
, ptrdiff_t length
)
3288 if (current_buffer
->overlay_center
< pos
)
3289 /* The deletion was to our right. No change needed; the before- and
3290 after-lists are still consistent. */
3292 else if (current_buffer
->overlay_center
- pos
> length
)
3293 /* The deletion was to our left. We need to adjust the center value
3294 to account for the change in position, but the lists are consistent
3295 given the new value. */
3296 current_buffer
->overlay_center
-= length
;
3298 /* We're right in the middle. There might be things on the after-list
3299 that now belong on the before-list. Recentering will move them,
3300 and also update the center point. */
3301 recenter_overlay_lists (current_buffer
, pos
);
3304 /* Fix up overlays that were garbled as a result of permuting markers
3305 in the range START through END. Any overlay with at least one
3306 endpoint in this range will need to be unlinked from the overlay
3307 list and reinserted in its proper place.
3308 Such an overlay might even have negative size at this point.
3309 If so, we'll make the overlay empty. */
3311 fix_start_end_in_overlays (register ptrdiff_t start
, register ptrdiff_t end
)
3313 Lisp_Object overlay
;
3314 struct Lisp_Overlay
*before_list
IF_LINT (= NULL
);
3315 struct Lisp_Overlay
*after_list
IF_LINT (= NULL
);
3316 /* These are either nil, indicating that before_list or after_list
3317 should be assigned, or the cons cell the cdr of which should be
3319 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3320 /* 'Parent', likewise, indicates a cons cell or
3321 current_buffer->overlays_before or overlays_after, depending
3322 which loop we're in. */
3323 struct Lisp_Overlay
*tail
, *parent
;
3324 ptrdiff_t startpos
, endpos
;
3326 /* This algorithm shifts links around instead of consing and GCing.
3327 The loop invariant is that before_list (resp. after_list) is a
3328 well-formed list except that its last element, the CDR of beforep
3329 (resp. afterp) if beforep (afterp) isn't nil or before_list
3330 (after_list) if it is, is still uninitialized. So it's not a bug
3331 that before_list isn't initialized, although it may look
3333 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3335 XSETMISC (overlay
, tail
);
3337 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3338 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3340 /* If the overlay is backwards, make it empty. */
3341 if (endpos
< startpos
)
3344 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3352 || (startpos
>= start
&& startpos
< end
))
3354 /* Add it to the end of the wrong list. Later on,
3355 recenter_overlay_lists will move it to the right place. */
3356 if (endpos
< current_buffer
->overlay_center
)
3361 afterp
->next
= tail
;
3369 beforep
->next
= tail
;
3373 current_buffer
->overlays_before
= tail
->next
;
3375 parent
->next
= tail
->next
;
3379 parent
= tail
, tail
= parent
->next
;
3381 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3383 XSETMISC (overlay
, tail
);
3385 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3386 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3388 /* If the overlay is backwards, make it empty. */
3389 if (endpos
< startpos
)
3392 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3396 if (startpos
>= end
)
3399 if (startpos
>= start
3400 || (endpos
>= start
&& endpos
< end
))
3402 if (endpos
< current_buffer
->overlay_center
)
3407 afterp
->next
= tail
;
3415 beforep
->next
= tail
;
3419 current_buffer
->overlays_after
= tail
->next
;
3421 parent
->next
= tail
->next
;
3425 parent
= tail
, tail
= parent
->next
;
3428 /* Splice the constructed (wrong) lists into the buffer's lists,
3429 and let the recenter function make it sane again. */
3432 beforep
->next
= current_buffer
->overlays_before
;
3433 current_buffer
->overlays_before
= before_list
;
3435 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3439 afterp
->next
= current_buffer
->overlays_after
;
3440 current_buffer
->overlays_after
= after_list
;
3442 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3445 /* We have two types of overlay: the one whose ending marker is
3446 after-insertion-marker (this is the usual case) and the one whose
3447 ending marker is before-insertion-marker. When `overlays_before'
3448 contains overlays of the latter type and the former type in this
3449 order and both overlays end at inserting position, inserting a text
3450 increases only the ending marker of the latter type, which results
3451 in incorrect ordering of `overlays_before'.
3453 This function fixes ordering of overlays in the slot
3454 `overlays_before' of the buffer *BP. Before the insertion, `point'
3455 was at PREV, and now is at POS. */
3458 fix_overlays_before (struct buffer
*bp
, ptrdiff_t prev
, ptrdiff_t pos
)
3460 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3461 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3463 ptrdiff_t end
IF_LINT (= 0);
3465 /* After the insertion, the several overlays may be in incorrect
3466 order. The possibility is that, in the list `overlays_before',
3467 an overlay which ends at POS appears after an overlay which ends
3468 at PREV. Since POS is greater than PREV, we must fix the
3469 ordering of these overlays, by moving overlays ends at POS before
3470 the overlays ends at PREV. */
3472 /* At first, find a place where disordered overlays should be linked
3473 in. It is where an overlay which end before POS exists. (i.e. an
3474 overlay whose ending marker is after-insertion-marker if disorder
3477 && (XSETMISC (tem
, tail
),
3478 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3484 /* If we don't find such an overlay,
3485 or the found one ends before PREV,
3486 or the found one is the last one in the list,
3487 we don't have to fix anything. */
3488 if (!tail
|| end
< prev
|| !tail
->next
)
3491 right_pair
= parent
;
3495 /* Now, end position of overlays in the list TAIL should be before
3496 or equal to PREV. In the loop, an overlay which ends at POS is
3497 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3498 we found an overlay which ends before PREV, the remaining
3499 overlays are in correct order. */
3502 XSETMISC (tem
, tail
);
3503 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3506 { /* This overlay is disordered. */
3507 struct Lisp_Overlay
*found
= tail
;
3509 /* Unlink the found overlay. */
3511 parent
->next
= tail
;
3512 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3513 and link it into the right place. */
3516 found
->next
= bp
->overlays_before
;
3517 bp
->overlays_before
= found
;
3521 found
->next
= right_pair
->next
;
3522 right_pair
->next
= found
;
3525 else if (end
== prev
)
3530 else /* No more disordered overlay. */
3535 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3536 doc
: /* Return t if OBJECT is an overlay. */)
3537 (Lisp_Object object
)
3539 return (OVERLAYP (object
) ? Qt
: Qnil
);
3542 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3543 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3544 If omitted, BUFFER defaults to the current buffer.
3545 BEG and END may be integers or markers.
3546 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3547 for the front of the overlay advance when text is inserted there
3548 \(which means the text *is not* included in the overlay).
3549 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3550 for the rear of the overlay advance when text is inserted there
3551 \(which means the text *is* included in the overlay). */)
3552 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3554 Lisp_Object overlay
;
3558 XSETBUFFER (buffer
, current_buffer
);
3560 CHECK_BUFFER (buffer
);
3562 && ! EQ (Fmarker_buffer (beg
), buffer
))
3563 error ("Marker points into wrong buffer");
3565 && ! EQ (Fmarker_buffer (end
), buffer
))
3566 error ("Marker points into wrong buffer");
3568 CHECK_NUMBER_COERCE_MARKER (beg
);
3569 CHECK_NUMBER_COERCE_MARKER (end
);
3571 if (XINT (beg
) > XINT (end
))
3574 temp
= beg
; beg
= end
; end
= temp
;
3577 b
= XBUFFER (buffer
);
3579 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3580 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3582 if (!NILP (front_advance
))
3583 XMARKER (beg
)->insertion_type
= 1;
3584 if (!NILP (rear_advance
))
3585 XMARKER (end
)->insertion_type
= 1;
3587 overlay
= allocate_misc ();
3588 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3589 XOVERLAY (overlay
)->start
= beg
;
3590 XOVERLAY (overlay
)->end
= end
;
3591 XOVERLAY (overlay
)->plist
= Qnil
;
3592 XOVERLAY (overlay
)->next
= NULL
;
3594 /* Put the new overlay on the wrong list. */
3595 end
= OVERLAY_END (overlay
);
3596 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3598 if (b
->overlays_after
)
3599 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3600 b
->overlays_after
= XOVERLAY (overlay
);
3604 if (b
->overlays_before
)
3605 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3606 b
->overlays_before
= XOVERLAY (overlay
);
3609 /* This puts it in the right list, and in the right order. */
3610 recenter_overlay_lists (b
, b
->overlay_center
);
3612 /* We don't need to redisplay the region covered by the overlay, because
3613 the overlay has no properties at the moment. */
3618 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3621 modify_overlay (struct buffer
*buf
, ptrdiff_t start
, ptrdiff_t end
)
3625 ptrdiff_t temp
= start
;
3630 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3632 /* If this is a buffer not in the selected window,
3633 we must do other windows. */
3634 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3635 windows_or_buffers_changed
= 1;
3636 /* If multiple windows show this buffer, we must do other windows. */
3637 else if (buffer_shared
> 1)
3638 windows_or_buffers_changed
= 1;
3639 /* If we modify an overlay at the end of the buffer, we cannot
3640 be sure that window end is still valid. */
3641 else if (end
>= ZV
&& start
<= ZV
)
3642 windows_or_buffers_changed
= 1;
3644 ++BUF_OVERLAY_MODIFF (buf
);
3648 static struct Lisp_Overlay
*
3649 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3651 struct Lisp_Overlay
*tmp
, *prev
;
3652 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3656 prev
->next
= tmp
->next
;
3659 overlay
->next
= NULL
;
3665 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3666 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3667 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3668 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3670 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3672 struct buffer
*b
, *ob
;
3673 Lisp_Object obuffer
;
3674 ptrdiff_t count
= SPECPDL_INDEX ();
3675 ptrdiff_t n_beg
, n_end
;
3677 CHECK_OVERLAY (overlay
);
3679 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3681 XSETBUFFER (buffer
, current_buffer
);
3682 CHECK_BUFFER (buffer
);
3685 && ! EQ (Fmarker_buffer (beg
), buffer
))
3686 error ("Marker points into wrong buffer");
3688 && ! EQ (Fmarker_buffer (end
), buffer
))
3689 error ("Marker points into wrong buffer");
3691 CHECK_NUMBER_COERCE_MARKER (beg
);
3692 CHECK_NUMBER_COERCE_MARKER (end
);
3694 if (XINT (beg
) > XINT (end
))
3697 temp
= beg
; beg
= end
; end
= temp
;
3700 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3701 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3702 n_beg
= marker_position (OVERLAY_START (overlay
));
3703 n_end
= marker_position (OVERLAY_END (overlay
));
3705 if (n_beg
== n_end
&& ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3706 return Fdelete_overlay (overlay
);
3708 specbind (Qinhibit_quit
, Qt
);
3710 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3711 b
= XBUFFER (buffer
);
3712 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3714 /* If the overlay has changed buffers, do a thorough redisplay. */
3715 if (!EQ (buffer
, obuffer
))
3717 /* Redisplay where the overlay was. */
3718 if (!NILP (obuffer
))
3723 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3724 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3726 modify_overlay (ob
, o_beg
, o_end
);
3729 /* Redisplay where the overlay is going to be. */
3730 modify_overlay (b
, n_beg
, n_end
);
3733 /* Redisplay the area the overlay has just left, or just enclosed. */
3735 ptrdiff_t o_beg
, o_end
;
3737 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3738 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3741 modify_overlay (b
, o_end
, n_end
);
3742 else if (o_end
== n_end
)
3743 modify_overlay (b
, o_beg
, n_beg
);
3745 modify_overlay (b
, min (o_beg
, n_beg
), max (o_end
, n_end
));
3748 if (!NILP (obuffer
))
3751 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3753 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3754 eassert (XOVERLAY (overlay
)->next
== NULL
);
3757 /* Put the overlay on the wrong list. */
3758 if (n_end
< b
->overlay_center
)
3760 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3761 b
->overlays_after
= XOVERLAY (overlay
);
3765 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3766 b
->overlays_before
= XOVERLAY (overlay
);
3769 /* This puts it in the right list, and in the right order. */
3770 recenter_overlay_lists (b
, b
->overlay_center
);
3772 return unbind_to (count
, overlay
);
3775 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3776 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3777 (Lisp_Object overlay
)
3781 ptrdiff_t count
= SPECPDL_INDEX ();
3783 CHECK_OVERLAY (overlay
);
3785 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3789 b
= XBUFFER (buffer
);
3790 specbind (Qinhibit_quit
, Qt
);
3792 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3793 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3794 eassert (XOVERLAY (overlay
)->next
== NULL
);
3796 marker_position (OVERLAY_START (overlay
)),
3797 marker_position (OVERLAY_END (overlay
)));
3798 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3799 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3801 /* When deleting an overlay with before or after strings, turn off
3802 display optimizations for the affected buffer, on the basis that
3803 these strings may contain newlines. This is easier to do than to
3804 check for that situation during redisplay. */
3805 if (!windows_or_buffers_changed
3806 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3807 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3808 b
->prevent_redisplay_optimizations_p
= 1;
3810 return unbind_to (count
, Qnil
);
3813 /* Overlay dissection functions. */
3815 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3816 doc
: /* Return the position at which OVERLAY starts. */)
3817 (Lisp_Object overlay
)
3819 CHECK_OVERLAY (overlay
);
3821 return (Fmarker_position (OVERLAY_START (overlay
)));
3824 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3825 doc
: /* Return the position at which OVERLAY ends. */)
3826 (Lisp_Object overlay
)
3828 CHECK_OVERLAY (overlay
);
3830 return (Fmarker_position (OVERLAY_END (overlay
)));
3833 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3834 doc
: /* Return the buffer OVERLAY belongs to.
3835 Return nil if OVERLAY has been deleted. */)
3836 (Lisp_Object overlay
)
3838 CHECK_OVERLAY (overlay
);
3840 return Fmarker_buffer (OVERLAY_START (overlay
));
3843 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3844 doc
: /* Return a list of the properties on OVERLAY.
3845 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3847 (Lisp_Object overlay
)
3849 CHECK_OVERLAY (overlay
);
3851 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3855 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3856 doc
: /* Return a list of the overlays that contain the character at POS. */)
3859 ptrdiff_t len
, noverlays
;
3860 Lisp_Object
*overlay_vec
;
3863 CHECK_NUMBER_COERCE_MARKER (pos
);
3866 /* We can't use alloca here because overlays_at can call xrealloc. */
3867 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3869 /* Put all the overlays we want in a vector in overlay_vec.
3870 Store the length in len. */
3871 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3874 /* Make a list of them all. */
3875 result
= Flist (noverlays
, overlay_vec
);
3877 xfree (overlay_vec
);
3881 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3882 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3883 Overlap means that at least one character is contained within the overlay
3884 and also contained within the specified region.
3885 Empty overlays are included in the result if they are located at BEG,
3886 between BEG and END, or at END provided END denotes the position at the
3887 end of the buffer. */)
3888 (Lisp_Object beg
, Lisp_Object end
)
3890 ptrdiff_t len
, noverlays
;
3891 Lisp_Object
*overlay_vec
;
3894 CHECK_NUMBER_COERCE_MARKER (beg
);
3895 CHECK_NUMBER_COERCE_MARKER (end
);
3898 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3900 /* Put all the overlays we want in a vector in overlay_vec.
3901 Store the length in len. */
3902 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3905 /* Make a list of them all. */
3906 result
= Flist (noverlays
, overlay_vec
);
3908 xfree (overlay_vec
);
3912 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3914 doc
: /* Return the next position after POS where an overlay starts or ends.
3915 If there are no overlay boundaries from POS to (point-max),
3916 the value is (point-max). */)
3919 ptrdiff_t i
, len
, noverlays
;
3921 Lisp_Object
*overlay_vec
;
3923 CHECK_NUMBER_COERCE_MARKER (pos
);
3926 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3928 /* Put all the overlays we want in a vector in overlay_vec.
3929 Store the length in len.
3930 endpos gets the position where the next overlay starts. */
3931 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3934 /* If any of these overlays ends before endpos,
3935 use its ending point instead. */
3936 for (i
= 0; i
< noverlays
; i
++)
3941 oend
= OVERLAY_END (overlay_vec
[i
]);
3942 oendpos
= OVERLAY_POSITION (oend
);
3943 if (oendpos
< endpos
)
3947 xfree (overlay_vec
);
3948 return make_number (endpos
);
3951 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3952 Sprevious_overlay_change
, 1, 1, 0,
3953 doc
: /* Return the previous position before POS where an overlay starts or ends.
3954 If there are no overlay boundaries from (point-min) to POS,
3955 the value is (point-min). */)
3959 Lisp_Object
*overlay_vec
;
3962 CHECK_NUMBER_COERCE_MARKER (pos
);
3964 /* At beginning of buffer, we know the answer;
3965 avoid bug subtracting 1 below. */
3966 if (XINT (pos
) == BEGV
)
3970 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3972 /* Put all the overlays we want in a vector in overlay_vec.
3973 Store the length in len.
3974 prevpos gets the position of the previous change. */
3975 overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3978 xfree (overlay_vec
);
3979 return make_number (prevpos
);
3982 /* These functions are for debugging overlays. */
3984 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3985 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3986 The car has all the overlays before the overlay center;
3987 the cdr has all the overlays after the overlay center.
3988 Recentering overlays moves overlays between these lists.
3989 The lists you get are copies, so that changing them has no effect.
3990 However, the overlays you get are the real objects that the buffer uses. */)
3993 struct Lisp_Overlay
*ol
;
3994 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
3995 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
3998 before
= Fcons (tmp
, before
);
4000 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4003 after
= Fcons (tmp
, after
);
4005 return Fcons (Fnreverse (before
), Fnreverse (after
));
4008 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4009 doc
: /* Recenter the overlays of the current buffer around position POS.
4010 That makes overlay lookup faster for positions near POS (but perhaps slower
4011 for positions far away from POS). */)
4015 CHECK_NUMBER_COERCE_MARKER (pos
);
4017 p
= clip_to_bounds (PTRDIFF_MIN
, XINT (pos
), PTRDIFF_MAX
);
4018 recenter_overlay_lists (current_buffer
, p
);
4022 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4023 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4024 (Lisp_Object overlay
, Lisp_Object prop
)
4026 CHECK_OVERLAY (overlay
);
4027 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4030 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4031 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE.
4032 VALUE will be returned.*/)
4033 (Lisp_Object overlay
, Lisp_Object prop
, Lisp_Object value
)
4035 Lisp_Object tail
, buffer
;
4038 CHECK_OVERLAY (overlay
);
4040 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4042 for (tail
= XOVERLAY (overlay
)->plist
;
4043 CONSP (tail
) && CONSP (XCDR (tail
));
4044 tail
= XCDR (XCDR (tail
)))
4045 if (EQ (XCAR (tail
), prop
))
4047 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4048 XSETCAR (XCDR (tail
), value
);
4051 /* It wasn't in the list, so add it to the front. */
4052 changed
= !NILP (value
);
4053 XOVERLAY (overlay
)->plist
4054 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4056 if (! NILP (buffer
))
4059 modify_overlay (XBUFFER (buffer
),
4060 marker_position (OVERLAY_START (overlay
)),
4061 marker_position (OVERLAY_END (overlay
)));
4062 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4063 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4064 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4065 Fdelete_overlay (overlay
);
4071 /* Subroutine of report_overlay_modification. */
4073 /* Lisp vector holding overlay hook functions to call.
4074 Vector elements come in pairs.
4075 Each even-index element is a list of hook functions.
4076 The following odd-index element is the overlay they came from.
4078 Before the buffer change, we fill in this vector
4079 as we call overlay hook functions.
4080 After the buffer change, we get the functions to call from this vector.
4081 This way we always call the same functions before and after the change. */
4082 static Lisp_Object last_overlay_modification_hooks
;
4084 /* Number of elements actually used in last_overlay_modification_hooks. */
4085 static ptrdiff_t last_overlay_modification_hooks_used
;
4087 /* Add one functionlist/overlay pair
4088 to the end of last_overlay_modification_hooks. */
4091 add_overlay_mod_hooklist (Lisp_Object functionlist
, Lisp_Object overlay
)
4093 ptrdiff_t oldsize
= ASIZE (last_overlay_modification_hooks
);
4095 if (oldsize
- 1 <= last_overlay_modification_hooks_used
)
4096 last_overlay_modification_hooks
=
4097 larger_vector (last_overlay_modification_hooks
, 2, -1);
4098 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4099 functionlist
); last_overlay_modification_hooks_used
++;
4100 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4101 overlay
); last_overlay_modification_hooks_used
++;
4104 /* Run the modification-hooks of overlays that include
4105 any part of the text in START to END.
4106 If this change is an insertion, also
4107 run the insert-before-hooks of overlay starting at END,
4108 and the insert-after-hooks of overlay ending at START.
4110 This is called both before and after the modification.
4111 AFTER is nonzero when we call after the modification.
4113 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4114 When AFTER is nonzero, they are the start position,
4115 the position after the inserted new text,
4116 and the length of deleted or replaced old text. */
4119 report_overlay_modification (Lisp_Object start
, Lisp_Object end
, int after
,
4120 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4122 Lisp_Object prop
, overlay
;
4123 struct Lisp_Overlay
*tail
;
4124 /* 1 if this change is an insertion. */
4125 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4126 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4131 /* We used to run the functions as soon as we found them and only register
4132 them in last_overlay_modification_hooks for the purpose of the `after'
4133 case. But running elisp code as we traverse the list of overlays is
4134 painful because the list can be modified by the elisp code so we had to
4135 copy at several places. We now simply do a read-only traversal that
4136 only collects the functions to run and we run them afterwards. It's
4137 simpler, especially since all the code was already there. -stef */
4141 /* We are being called before a change.
4142 Scan the overlays to find the functions to call. */
4143 last_overlay_modification_hooks_used
= 0;
4144 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4146 ptrdiff_t startpos
, endpos
;
4147 Lisp_Object ostart
, oend
;
4149 XSETMISC (overlay
, tail
);
4151 ostart
= OVERLAY_START (overlay
);
4152 oend
= OVERLAY_END (overlay
);
4153 endpos
= OVERLAY_POSITION (oend
);
4154 if (XFASTINT (start
) > endpos
)
4156 startpos
= OVERLAY_POSITION (ostart
);
4157 if (insertion
&& (XFASTINT (start
) == startpos
4158 || XFASTINT (end
) == startpos
))
4160 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4162 add_overlay_mod_hooklist (prop
, overlay
);
4164 if (insertion
&& (XFASTINT (start
) == endpos
4165 || XFASTINT (end
) == endpos
))
4167 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4169 add_overlay_mod_hooklist (prop
, overlay
);
4171 /* Test for intersecting intervals. This does the right thing
4172 for both insertion and deletion. */
4173 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4175 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4177 add_overlay_mod_hooklist (prop
, overlay
);
4181 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4183 ptrdiff_t startpos
, endpos
;
4184 Lisp_Object ostart
, oend
;
4186 XSETMISC (overlay
, tail
);
4188 ostart
= OVERLAY_START (overlay
);
4189 oend
= OVERLAY_END (overlay
);
4190 startpos
= OVERLAY_POSITION (ostart
);
4191 endpos
= OVERLAY_POSITION (oend
);
4192 if (XFASTINT (end
) < startpos
)
4194 if (insertion
&& (XFASTINT (start
) == startpos
4195 || XFASTINT (end
) == startpos
))
4197 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4199 add_overlay_mod_hooklist (prop
, overlay
);
4201 if (insertion
&& (XFASTINT (start
) == endpos
4202 || XFASTINT (end
) == endpos
))
4204 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4206 add_overlay_mod_hooklist (prop
, overlay
);
4208 /* Test for intersecting intervals. This does the right thing
4209 for both insertion and deletion. */
4210 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4212 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4214 add_overlay_mod_hooklist (prop
, overlay
);
4219 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4221 /* Call the functions recorded in last_overlay_modification_hooks.
4222 First copy the vector contents, in case some of these hooks
4223 do subsequent modification of the buffer. */
4224 ptrdiff_t size
= last_overlay_modification_hooks_used
;
4225 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4228 memcpy (copy
, XVECTOR (last_overlay_modification_hooks
)->contents
,
4229 size
* sizeof (Lisp_Object
));
4231 gcpro1
.nvars
= size
;
4233 for (i
= 0; i
< size
;)
4235 Lisp_Object prop_i
, overlay_i
;
4237 overlay_i
= copy
[i
++];
4238 call_overlay_mod_hooks (prop_i
, overlay_i
, after
, arg1
, arg2
, arg3
);
4245 call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
, int after
,
4246 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4248 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4250 GCPRO4 (list
, arg1
, arg2
, arg3
);
4252 while (CONSP (list
))
4255 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4257 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4263 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4266 evaporate_overlays (ptrdiff_t pos
)
4268 Lisp_Object overlay
, hit_list
;
4269 struct Lisp_Overlay
*tail
;
4272 if (pos
<= current_buffer
->overlay_center
)
4273 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4276 XSETMISC (overlay
, tail
);
4277 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4280 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4281 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4282 hit_list
= Fcons (overlay
, hit_list
);
4285 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4288 XSETMISC (overlay
, tail
);
4289 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4292 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4293 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4294 hit_list
= Fcons (overlay
, hit_list
);
4296 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4297 Fdelete_overlay (XCAR (hit_list
));
4300 /* Somebody has tried to store a value with an unacceptable type
4301 in the slot with offset OFFSET. */
4304 buffer_slot_type_mismatch (Lisp_Object newval
, int type
)
4306 Lisp_Object predicate
;
4310 case_Lisp_Int
: predicate
= Qintegerp
; break;
4311 case Lisp_String
: predicate
= Qstringp
; break;
4312 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4316 wrong_type_argument (predicate
, newval
);
4320 /***********************************************************************
4321 Allocation with mmap
4322 ***********************************************************************/
4324 #ifdef USE_MMAP_FOR_BUFFERS
4326 #include <sys/types.h>
4327 #include <sys/mman.h>
4330 #ifdef MAP_ANONYMOUS
4331 #define MAP_ANON MAP_ANONYMOUS
4338 #define MAP_FAILED ((void *) -1)
4350 /* Memory is allocated in regions which are mapped using mmap(2).
4351 The current implementation lets the system select mapped
4352 addresses; we're not using MAP_FIXED in general, except when
4353 trying to enlarge regions.
4355 Each mapped region starts with a mmap_region structure, the user
4356 area starts after that structure, aligned to MEM_ALIGN.
4358 +-----------------------+
4359 | struct mmap_info + |
4361 +-----------------------+
4365 +-----------------------+ */
4369 /* User-specified size. */
4370 size_t nbytes_specified
;
4372 /* Number of bytes mapped */
4373 size_t nbytes_mapped
;
4375 /* Pointer to the location holding the address of the memory
4376 allocated with the mmap'd block. The variable actually points
4377 after this structure. */
4380 /* Next and previous in list of all mmap'd regions. */
4381 struct mmap_region
*next
, *prev
;
4384 /* Doubly-linked list of mmap'd regions. */
4386 static struct mmap_region
*mmap_regions
;
4388 /* File descriptor for mmap. If we don't have anonymous mapping,
4389 /dev/zero will be opened on it. */
4393 /* Temporary storage for mmap_set_vars, see there. */
4395 static struct mmap_region
*mmap_regions_1
;
4396 static int mmap_fd_1
;
4398 /* Page size on this system. */
4400 static int mmap_page_size
;
4402 /* 1 means mmap has been intialized. */
4404 static int mmap_initialized_p
;
4406 /* Value is X rounded up to the next multiple of N. */
4408 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4410 /* Size of mmap_region structure plus padding. */
4412 #define MMAP_REGION_STRUCT_SIZE \
4413 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4415 /* Given a pointer P to the start of the user-visible part of a mapped
4416 region, return a pointer to the start of the region. */
4418 #define MMAP_REGION(P) \
4419 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4421 /* Given a pointer P to the start of a mapped region, return a pointer
4422 to the start of the user-visible part of the region. */
4424 #define MMAP_USER_AREA(P) \
4425 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4427 #define MEM_ALIGN sizeof (double)
4429 /* Predicate returning true if part of the address range [START .. END]
4430 is currently mapped. Used to prevent overwriting an existing
4433 Default is to conservativly assume the address range is occupied by
4434 something else. This can be overridden by system configuration
4435 files if system-specific means to determine this exists. */
4437 #ifndef MMAP_ALLOCATED_P
4438 #define MMAP_ALLOCATED_P(start, end) 1
4441 /* Perform necessary intializations for the use of mmap. */
4447 /* The value of mmap_fd is initially 0 in temacs, and -1
4448 in a dumped Emacs. */
4451 /* No anonymous mmap -- we need the file descriptor. */
4452 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4454 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4456 #endif /* MAP_ANON == 0 */
4458 if (mmap_initialized_p
)
4460 mmap_initialized_p
= 1;
4466 mmap_page_size
= getpagesize ();
4469 /* Return a region overlapping address range START...END, or null if
4470 none. END is not including, i.e. the last byte in the range
4473 static struct mmap_region
*
4474 mmap_find (POINTER_TYPE
*start
, POINTER_TYPE
*end
)
4476 struct mmap_region
*r
;
4477 char *s
= (char *) start
, *e
= (char *) end
;
4479 for (r
= mmap_regions
; r
; r
= r
->next
)
4481 char *rstart
= (char *) r
;
4482 char *rend
= rstart
+ r
->nbytes_mapped
;
4484 if (/* First byte of range, i.e. START, in this region? */
4485 (s
>= rstart
&& s
< rend
)
4486 /* Last byte of range, i.e. END - 1, in this region? */
4487 || (e
> rstart
&& e
<= rend
)
4488 /* First byte of this region in the range? */
4489 || (rstart
>= s
&& rstart
< e
)
4490 /* Last byte of this region in the range? */
4491 || (rend
> s
&& rend
<= e
))
4499 /* Unmap a region. P is a pointer to the start of the user-araa of
4500 the region. Value is non-zero if successful. */
4503 mmap_free_1 (struct mmap_region
*r
)
4506 r
->next
->prev
= r
->prev
;
4508 r
->prev
->next
= r
->next
;
4510 mmap_regions
= r
->next
;
4512 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4514 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4522 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4523 Value is non-zero if successful. */
4526 mmap_enlarge (struct mmap_region
*r
, int npages
)
4528 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4534 /* Unmap pages at the end of the region. */
4535 nbytes
= - npages
* mmap_page_size
;
4536 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4537 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4540 r
->nbytes_mapped
-= nbytes
;
4544 else if (npages
> 0)
4546 nbytes
= npages
* mmap_page_size
;
4548 /* Try to map additional pages at the end of the region. We
4549 cannot do this if the address range is already occupied by
4550 something else because mmap deletes any previous mapping.
4551 I'm not sure this is worth doing, let's see. */
4552 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4556 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4557 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4558 if (p
== MAP_FAILED
)
4559 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4560 else if (p
!= (POINTER_TYPE
*) region_end
)
4562 /* Kernels are free to choose a different address. In
4563 that case, unmap what we've mapped above; we have
4565 if (munmap (p
, nbytes
) == -1)
4566 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4570 r
->nbytes_mapped
+= nbytes
;
4580 /* Set or reset variables holding references to mapped regions. If
4581 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4582 non-zero, set all variables to the start of the user-areas
4585 This function is called from Fdump_emacs to ensure that the dumped
4586 Emacs doesn't contain references to memory that won't be mapped
4587 when Emacs starts. */
4590 mmap_set_vars (int restore_p
)
4592 struct mmap_region
*r
;
4596 mmap_regions
= mmap_regions_1
;
4597 mmap_fd
= mmap_fd_1
;
4598 for (r
= mmap_regions
; r
; r
= r
->next
)
4599 *r
->var
= MMAP_USER_AREA (r
);
4603 for (r
= mmap_regions
; r
; r
= r
->next
)
4605 mmap_regions_1
= mmap_regions
;
4606 mmap_regions
= NULL
;
4607 mmap_fd_1
= mmap_fd
;
4613 /* Allocate a block of storage large enough to hold NBYTES bytes of
4614 data. A pointer to the data is returned in *VAR. VAR is thus the
4615 address of some variable which will use the data area.
4617 The allocation of 0 bytes is valid.
4619 If we can't allocate the necessary memory, set *VAR to null, and
4622 static POINTER_TYPE
*
4623 mmap_alloc (POINTER_TYPE
**var
, size_t nbytes
)
4630 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4631 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4634 if (p
== MAP_FAILED
)
4636 if (errno
!= ENOMEM
)
4637 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4642 struct mmap_region
*r
= (struct mmap_region
*) p
;
4644 r
->nbytes_specified
= nbytes
;
4645 r
->nbytes_mapped
= map
;
4648 r
->next
= mmap_regions
;
4653 p
= MMAP_USER_AREA (p
);
4660 /* Free a block of relocatable storage whose data is pointed to by
4661 PTR. Store 0 in *PTR to show there's no block allocated. */
4664 mmap_free (POINTER_TYPE
**var
)
4670 mmap_free_1 (MMAP_REGION (*var
));
4676 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4677 resize it to size NBYTES. Change *VAR to reflect the new block,
4678 and return this value. If more memory cannot be allocated, then
4679 leave *VAR unchanged, and return null. */
4681 static POINTER_TYPE
*
4682 mmap_realloc (POINTER_TYPE
**var
, size_t nbytes
)
4684 POINTER_TYPE
*result
;
4689 result
= mmap_alloc (var
, nbytes
);
4690 else if (nbytes
== 0)
4693 result
= mmap_alloc (var
, nbytes
);
4697 struct mmap_region
*r
= MMAP_REGION (*var
);
4698 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4703 POINTER_TYPE
*old_ptr
= *var
;
4705 /* Try to map additional pages at the end of the region.
4706 If that fails, allocate a new region, copy data
4707 from the old region, then free it. */
4708 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4711 r
->nbytes_specified
= nbytes
;
4712 *var
= result
= old_ptr
;
4714 else if (mmap_alloc (var
, nbytes
))
4716 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4717 mmap_free_1 (MMAP_REGION (old_ptr
));
4719 r
= MMAP_REGION (result
);
4720 r
->nbytes_specified
= nbytes
;
4728 else if (room
- nbytes
>= mmap_page_size
)
4730 /* Shrinking by at least a page. Let's give some
4731 memory back to the system.
4733 The extra parens are to make the division happens first,
4734 on positive values, so we know it will round towards
4736 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4738 r
->nbytes_specified
= nbytes
;
4742 /* Leave it alone. */
4744 r
->nbytes_specified
= nbytes
;
4752 #endif /* USE_MMAP_FOR_BUFFERS */
4756 /***********************************************************************
4757 Buffer-text Allocation
4758 ***********************************************************************/
4761 extern POINTER_TYPE
*r_alloc (POINTER_TYPE
**, size_t);
4762 extern POINTER_TYPE
*r_re_alloc (POINTER_TYPE
**, size_t);
4763 extern void r_alloc_free (POINTER_TYPE
**ptr
);
4764 #endif /* REL_ALLOC */
4767 /* Allocate NBYTES bytes for buffer B's text buffer. */
4770 alloc_buffer_text (struct buffer
*b
, ptrdiff_t nbytes
)
4775 #if defined USE_MMAP_FOR_BUFFERS
4776 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4777 #elif defined REL_ALLOC
4778 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4780 p
= xmalloc (nbytes
);
4786 memory_full (nbytes
);
4789 b
->text
->beg
= (unsigned char *) p
;
4793 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4797 enlarge_buffer_text (struct buffer
*b
, ptrdiff_t delta
)
4800 ptrdiff_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4803 #if defined USE_MMAP_FOR_BUFFERS
4804 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4805 #elif defined REL_ALLOC
4806 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4808 p
= xrealloc (b
->text
->beg
, nbytes
);
4814 memory_full (nbytes
);
4817 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4822 /* Free buffer B's text buffer. */
4825 free_buffer_text (struct buffer
*b
)
4829 #if defined USE_MMAP_FOR_BUFFERS
4830 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4831 #elif defined REL_ALLOC
4832 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4834 xfree (b
->text
->beg
);
4837 BUF_BEG_ADDR (b
) = NULL
;
4843 /***********************************************************************
4845 ***********************************************************************/
4848 init_buffer_once (void)
4852 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
4854 /* Make sure all markable slots in buffer_defaults
4855 are initialized reasonably, so mark_buffer won't choke. */
4856 reset_buffer (&buffer_defaults
);
4857 eassert (EQ (BVAR (&buffer_defaults
, name
), make_number (0)));
4858 reset_buffer_local_variables (&buffer_defaults
, 1);
4859 eassert (EQ (BVAR (&buffer_local_symbols
, name
), make_number (0)));
4860 reset_buffer (&buffer_local_symbols
);
4861 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4862 /* Prevent GC from getting confused. */
4863 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4864 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4865 BUF_INTERVALS (&buffer_defaults
) = 0;
4866 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4867 XSETPVECTYPESIZE (&buffer_defaults
, PVEC_BUFFER
, 0);
4868 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4869 XSETPVECTYPESIZE (&buffer_local_symbols
, PVEC_BUFFER
, 0);
4870 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4872 /* Set up the default values of various buffer slots. */
4873 /* Must do these before making the first buffer! */
4875 /* real setup is done in bindings.el */
4876 BVAR (&buffer_defaults
, mode_line_format
) = make_pure_c_string ("%-");
4877 BVAR (&buffer_defaults
, header_line_format
) = Qnil
;
4878 BVAR (&buffer_defaults
, abbrev_mode
) = Qnil
;
4879 BVAR (&buffer_defaults
, overwrite_mode
) = Qnil
;
4880 BVAR (&buffer_defaults
, case_fold_search
) = Qt
;
4881 BVAR (&buffer_defaults
, auto_fill_function
) = Qnil
;
4882 BVAR (&buffer_defaults
, selective_display
) = Qnil
;
4884 BVAR (&buffer_defaults
, selective_display_ellipses
) = Qt
;
4886 BVAR (&buffer_defaults
, abbrev_table
) = Qnil
;
4887 BVAR (&buffer_defaults
, display_table
) = Qnil
;
4888 BVAR (&buffer_defaults
, undo_list
) = Qnil
;
4889 BVAR (&buffer_defaults
, mark_active
) = Qnil
;
4890 BVAR (&buffer_defaults
, file_format
) = Qnil
;
4891 BVAR (&buffer_defaults
, auto_save_file_format
) = Qt
;
4892 buffer_defaults
.overlays_before
= NULL
;
4893 buffer_defaults
.overlays_after
= NULL
;
4894 buffer_defaults
.overlay_center
= BEG
;
4896 XSETFASTINT (BVAR (&buffer_defaults
, tab_width
), 8);
4897 BVAR (&buffer_defaults
, truncate_lines
) = Qnil
;
4898 BVAR (&buffer_defaults
, word_wrap
) = Qnil
;
4899 BVAR (&buffer_defaults
, ctl_arrow
) = Qt
;
4900 BVAR (&buffer_defaults
, bidi_display_reordering
) = Qt
;
4901 BVAR (&buffer_defaults
, bidi_paragraph_direction
) = Qnil
;
4902 BVAR (&buffer_defaults
, cursor_type
) = Qt
;
4903 BVAR (&buffer_defaults
, extra_line_spacing
) = Qnil
;
4904 BVAR (&buffer_defaults
, cursor_in_non_selected_windows
) = Qt
;
4906 BVAR (&buffer_defaults
, enable_multibyte_characters
) = Qt
;
4907 BVAR (&buffer_defaults
, buffer_file_coding_system
) = Qnil
;
4908 XSETFASTINT (BVAR (&buffer_defaults
, fill_column
), 70);
4909 XSETFASTINT (BVAR (&buffer_defaults
, left_margin
), 0);
4910 BVAR (&buffer_defaults
, cache_long_line_scans
) = Qnil
;
4911 BVAR (&buffer_defaults
, file_truename
) = Qnil
;
4912 XSETFASTINT (BVAR (&buffer_defaults
, display_count
), 0);
4913 XSETFASTINT (BVAR (&buffer_defaults
, left_margin_cols
), 0);
4914 XSETFASTINT (BVAR (&buffer_defaults
, right_margin_cols
), 0);
4915 BVAR (&buffer_defaults
, left_fringe_width
) = Qnil
;
4916 BVAR (&buffer_defaults
, right_fringe_width
) = Qnil
;
4917 BVAR (&buffer_defaults
, fringes_outside_margins
) = Qnil
;
4918 BVAR (&buffer_defaults
, scroll_bar_width
) = Qnil
;
4919 BVAR (&buffer_defaults
, vertical_scroll_bar_type
) = Qt
;
4920 BVAR (&buffer_defaults
, indicate_empty_lines
) = Qnil
;
4921 BVAR (&buffer_defaults
, indicate_buffer_boundaries
) = Qnil
;
4922 BVAR (&buffer_defaults
, fringe_indicator_alist
) = Qnil
;
4923 BVAR (&buffer_defaults
, fringe_cursor_alist
) = Qnil
;
4924 BVAR (&buffer_defaults
, scroll_up_aggressively
) = Qnil
;
4925 BVAR (&buffer_defaults
, scroll_down_aggressively
) = Qnil
;
4926 BVAR (&buffer_defaults
, display_time
) = Qnil
;
4928 /* Assign the local-flags to the slots that have default values.
4929 The local flag is a bit that is used in the buffer
4930 to say that it has its own local value for the slot.
4931 The local flag bits are in the local_var_flags slot of the buffer. */
4933 /* Nothing can work if this isn't true */
4934 { verify (sizeof (EMACS_INT
) == sizeof (Lisp_Object
)); }
4936 /* 0 means not a lisp var, -1 means always local, else mask */
4937 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
4938 XSETINT (BVAR (&buffer_local_flags
, filename
), -1);
4939 XSETINT (BVAR (&buffer_local_flags
, directory
), -1);
4940 XSETINT (BVAR (&buffer_local_flags
, backed_up
), -1);
4941 XSETINT (BVAR (&buffer_local_flags
, save_length
), -1);
4942 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_name
), -1);
4943 XSETINT (BVAR (&buffer_local_flags
, read_only
), -1);
4944 XSETINT (BVAR (&buffer_local_flags
, major_mode
), -1);
4945 XSETINT (BVAR (&buffer_local_flags
, mode_name
), -1);
4946 XSETINT (BVAR (&buffer_local_flags
, undo_list
), -1);
4947 XSETINT (BVAR (&buffer_local_flags
, mark_active
), -1);
4948 XSETINT (BVAR (&buffer_local_flags
, point_before_scroll
), -1);
4949 XSETINT (BVAR (&buffer_local_flags
, file_truename
), -1);
4950 XSETINT (BVAR (&buffer_local_flags
, invisibility_spec
), -1);
4951 XSETINT (BVAR (&buffer_local_flags
, file_format
), -1);
4952 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_format
), -1);
4953 XSETINT (BVAR (&buffer_local_flags
, display_count
), -1);
4954 XSETINT (BVAR (&buffer_local_flags
, display_time
), -1);
4955 XSETINT (BVAR (&buffer_local_flags
, enable_multibyte_characters
), -1);
4958 XSETFASTINT (BVAR (&buffer_local_flags
, mode_line_format
), idx
); ++idx
;
4959 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_mode
), idx
); ++idx
;
4960 XSETFASTINT (BVAR (&buffer_local_flags
, overwrite_mode
), idx
); ++idx
;
4961 XSETFASTINT (BVAR (&buffer_local_flags
, case_fold_search
), idx
); ++idx
;
4962 XSETFASTINT (BVAR (&buffer_local_flags
, auto_fill_function
), idx
); ++idx
;
4963 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display
), idx
); ++idx
;
4965 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display_ellipses
), idx
); ++idx
;
4967 XSETFASTINT (BVAR (&buffer_local_flags
, tab_width
), idx
); ++idx
;
4968 XSETFASTINT (BVAR (&buffer_local_flags
, truncate_lines
), idx
); ++idx
;
4969 XSETFASTINT (BVAR (&buffer_local_flags
, word_wrap
), idx
); ++idx
;
4970 XSETFASTINT (BVAR (&buffer_local_flags
, ctl_arrow
), idx
); ++idx
;
4971 XSETFASTINT (BVAR (&buffer_local_flags
, fill_column
), idx
); ++idx
;
4972 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin
), idx
); ++idx
;
4973 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_table
), idx
); ++idx
;
4974 XSETFASTINT (BVAR (&buffer_local_flags
, display_table
), idx
); ++idx
;
4975 XSETFASTINT (BVAR (&buffer_local_flags
, syntax_table
), idx
); ++idx
;
4976 XSETFASTINT (BVAR (&buffer_local_flags
, cache_long_line_scans
), idx
); ++idx
;
4977 XSETFASTINT (BVAR (&buffer_local_flags
, category_table
), idx
); ++idx
;
4978 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_display_reordering
), idx
); ++idx
;
4979 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_paragraph_direction
), idx
); ++idx
;
4980 XSETFASTINT (BVAR (&buffer_local_flags
, buffer_file_coding_system
), idx
);
4981 /* Make this one a permanent local. */
4982 buffer_permanent_local_flags
[idx
++] = 1;
4983 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin_cols
), idx
); ++idx
;
4984 XSETFASTINT (BVAR (&buffer_local_flags
, right_margin_cols
), idx
); ++idx
;
4985 XSETFASTINT (BVAR (&buffer_local_flags
, left_fringe_width
), idx
); ++idx
;
4986 XSETFASTINT (BVAR (&buffer_local_flags
, right_fringe_width
), idx
); ++idx
;
4987 XSETFASTINT (BVAR (&buffer_local_flags
, fringes_outside_margins
), idx
); ++idx
;
4988 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_bar_width
), idx
); ++idx
;
4989 XSETFASTINT (BVAR (&buffer_local_flags
, vertical_scroll_bar_type
), idx
); ++idx
;
4990 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_empty_lines
), idx
); ++idx
;
4991 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_buffer_boundaries
), idx
); ++idx
;
4992 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_indicator_alist
), idx
); ++idx
;
4993 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_cursor_alist
), idx
); ++idx
;
4994 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_up_aggressively
), idx
); ++idx
;
4995 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_down_aggressively
), idx
); ++idx
;
4996 XSETFASTINT (BVAR (&buffer_local_flags
, header_line_format
), idx
); ++idx
;
4997 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_type
), idx
); ++idx
;
4998 XSETFASTINT (BVAR (&buffer_local_flags
, extra_line_spacing
), idx
); ++idx
;
4999 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_in_non_selected_windows
), idx
); ++idx
;
5001 /* Need more room? */
5002 if (idx
>= MAX_PER_BUFFER_VARS
)
5004 last_per_buffer_idx
= idx
;
5006 Vbuffer_alist
= Qnil
;
5010 QSFundamental
= make_pure_c_string ("Fundamental");
5012 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5013 BVAR (&buffer_defaults
, major_mode
) = Qfundamental_mode
;
5015 Qmode_class
= intern_c_string ("mode-class");
5017 Qprotected_field
= intern_c_string ("protected-field");
5019 Qpermanent_local
= intern_c_string ("permanent-local");
5021 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5022 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5024 Qucs_set_table_for_input
= intern_c_string ("ucs-set-table-for-input");
5026 /* super-magic invisible buffer */
5027 Vprin1_to_string_buffer
= Fget_buffer_create (make_pure_c_string (" prin1"));
5028 Vbuffer_alist
= Qnil
;
5030 Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*")));
5032 inhibit_modification_hooks
= 0;
5042 #ifdef USE_MMAP_FOR_BUFFERS
5044 /* When using the ralloc implementation based on mmap(2), buffer
5045 text pointers will have been set to null in the dumped Emacs.
5049 for (b
= all_buffers
; b
; b
= b
->header
.next
.buffer
)
5050 if (b
->text
->beg
== NULL
)
5051 enlarge_buffer_text (b
, 0);
5053 #endif /* USE_MMAP_FOR_BUFFERS */
5055 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5056 if (NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5057 Fset_buffer_multibyte (Qnil
);
5059 pwd
= get_current_dir_name ();
5062 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5064 /* Maybe this should really use some standard subroutine
5065 whose definition is filename syntax dependent. */
5067 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5069 /* Grow buffer to add directory separator and '\0'. */
5070 pwd
= (char *) realloc (pwd
, len
+ 2);
5072 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5073 pwd
[len
] = DIRECTORY_SEP
;
5074 pwd
[len
+ 1] = '\0';
5077 BVAR (current_buffer
, directory
) = make_unibyte_string (pwd
, strlen (pwd
));
5078 if (! NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5079 /* At this moment, we still don't know how to decode the
5080 directory name. So, we keep the bytes in multibyte form so
5081 that ENCODE_FILE correctly gets the original bytes. */
5082 BVAR (current_buffer
, directory
)
5083 = string_to_multibyte (BVAR (current_buffer
, directory
));
5085 /* Add /: to the front of the name
5086 if it would otherwise be treated as magic. */
5087 temp
= Ffind_file_name_handler (BVAR (current_buffer
, directory
), Qt
);
5089 /* If the default dir is just /, TEMP is non-nil
5090 because of the ange-ftp completion handler.
5091 However, it is not necessary to turn / into /:/.
5092 So avoid doing that. */
5093 && strcmp ("/", SSDATA (BVAR (current_buffer
, directory
))))
5094 BVAR (current_buffer
, directory
)
5095 = concat2 (build_string ("/:"), BVAR (current_buffer
, directory
));
5097 temp
= get_minibuffer (0);
5098 BVAR (XBUFFER (temp
), directory
) = BVAR (current_buffer
, directory
);
5103 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5104 Object stored in the current buffer. address is the address of the slot
5105 in the buffer that is current now. */
5107 /* TYPE is nil for a general Lisp variable.
5108 An integer specifies a type; then only Lisp values
5109 with that type code are allowed (except that nil is allowed too).
5110 LNAME is the Lisp-level variable name.
5111 VNAME is the name of the buffer slot.
5112 DOC is a dummy where you write the doc string as a comment. */
5113 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5115 static struct Lisp_Buffer_Objfwd bo_fwd; \
5116 defvar_per_buffer (&bo_fwd, lname, vname, type); \
5120 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, const char *namestring
,
5121 Lisp_Object
*address
, Lisp_Object type
)
5123 struct Lisp_Symbol
*sym
;
5126 sym
= XSYMBOL (intern (namestring
));
5127 offset
= (char *)address
- (char *)current_buffer
;
5129 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5130 bo_fwd
->offset
= offset
;
5131 bo_fwd
->slottype
= type
;
5132 sym
->declared_special
= 1;
5133 sym
->redirect
= SYMBOL_FORWARDED
;
5135 /* I tried to do the job without a cast, but it seems impossible.
5136 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5137 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5139 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5141 if (PER_BUFFER_IDX (offset
) == 0)
5142 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5143 slot of buffer_local_flags */
5148 /* initialize the buffer routines */
5150 syms_of_buffer (void)
5152 staticpro (&last_overlay_modification_hooks
);
5153 last_overlay_modification_hooks
5154 = Fmake_vector (make_number (10), Qnil
);
5156 staticpro (&Vbuffer_defaults
);
5157 staticpro (&Vbuffer_local_symbols
);
5158 staticpro (&Qfundamental_mode
);
5159 staticpro (&Qmode_class
);
5160 staticpro (&QSFundamental
);
5161 staticpro (&Vbuffer_alist
);
5162 staticpro (&Qprotected_field
);
5163 staticpro (&Qpermanent_local
);
5164 staticpro (&Qkill_buffer_hook
);
5166 DEFSYM (Qpermanent_local_hook
, "permanent-local-hook");
5167 DEFSYM (Qoverlayp
, "overlayp");
5168 DEFSYM (Qevaporate
, "evaporate");
5169 DEFSYM (Qmodification_hooks
, "modification-hooks");
5170 DEFSYM (Qinsert_in_front_hooks
, "insert-in-front-hooks");
5171 DEFSYM (Qinsert_behind_hooks
, "insert-behind-hooks");
5172 DEFSYM (Qget_file_buffer
, "get-file-buffer");
5173 DEFSYM (Qpriority
, "priority");
5174 DEFSYM (Qbefore_string
, "before-string");
5175 DEFSYM (Qafter_string
, "after-string");
5176 DEFSYM (Qfirst_change_hook
, "first-change-hook");
5177 DEFSYM (Qbefore_change_functions
, "before-change-functions");
5178 DEFSYM (Qafter_change_functions
, "after-change-functions");
5179 DEFSYM (Qkill_buffer_query_functions
, "kill-buffer-query-functions");
5181 /* The next one is initialized in init_buffer_once. */
5182 staticpro (&Qucs_set_table_for_input
);
5184 Fput (Qprotected_field
, Qerror_conditions
,
5185 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5186 Fput (Qprotected_field
, Qerror_message
,
5187 make_pure_c_string ("Attempt to modify a protected field"));
5189 DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format",
5191 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5192 This is the same as (default-value 'mode-line-format). */);
5194 DEFVAR_BUFFER_DEFAULTS ("default-header-line-format",
5196 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5197 This is the same as (default-value 'header-line-format). */);
5199 DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type
,
5200 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5201 This is the same as (default-value 'cursor-type). */);
5203 DEFVAR_BUFFER_DEFAULTS ("default-line-spacing",
5205 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5206 This is the same as (default-value 'line-spacing). */);
5208 DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows",
5209 cursor_in_non_selected_windows
,
5210 doc
: /* Default value of `cursor-in-non-selected-windows'.
5211 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5213 DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode",
5215 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5216 This is the same as (default-value 'abbrev-mode). */);
5218 DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow",
5220 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5221 This is the same as (default-value 'ctl-arrow). */);
5223 DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters",
5224 enable_multibyte_characters
,
5225 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5226 This is the same as (default-value 'enable-multibyte-characters). */);
5228 DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system",
5229 buffer_file_coding_system
,
5230 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5231 This is the same as (default-value 'buffer-file-coding-system). */);
5233 DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines",
5235 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5236 This is the same as (default-value 'truncate-lines). */);
5238 DEFVAR_BUFFER_DEFAULTS ("default-fill-column",
5240 doc
: /* Default value of `fill-column' for buffers that do not override it.
5241 This is the same as (default-value 'fill-column). */);
5243 DEFVAR_BUFFER_DEFAULTS ("default-left-margin",
5245 doc
: /* Default value of `left-margin' for buffers that do not override it.
5246 This is the same as (default-value 'left-margin). */);
5248 DEFVAR_BUFFER_DEFAULTS ("default-tab-width",
5250 doc
: /* Default value of `tab-width' for buffers that do not override it.
5251 This is the same as (default-value 'tab-width). */);
5253 DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search",
5255 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5256 This is the same as (default-value 'case-fold-search). */);
5258 DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width",
5260 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5261 This is the same as (default-value 'left-margin-width). */);
5263 DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width",
5265 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5266 This is the same as (default-value 'right-margin-width). */);
5268 DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width",
5270 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5271 This is the same as (default-value 'left-fringe-width). */);
5273 DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width",
5275 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5276 This is the same as (default-value 'right-fringe-width). */);
5278 DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins",
5279 fringes_outside_margins
,
5280 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5281 This is the same as (default-value 'fringes-outside-margins). */);
5283 DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width",
5285 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5286 This is the same as (default-value 'scroll-bar-width). */);
5288 DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar",
5289 vertical_scroll_bar_type
,
5290 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5291 This is the same as (default-value 'vertical-scroll-bar). */);
5293 DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines",
5294 indicate_empty_lines
,
5295 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5296 This is the same as (default-value 'indicate-empty-lines). */);
5298 DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries",
5299 indicate_buffer_boundaries
,
5300 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5301 This is the same as (default-value 'indicate-buffer-boundaries). */);
5303 DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist",
5304 fringe_indicator_alist
,
5305 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5306 This is the same as (default-value 'fringe-indicator-alist'). */);
5308 DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist",
5309 fringe_cursor_alist
,
5310 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5311 This is the same as (default-value 'fringe-cursor-alist'). */);
5313 DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively",
5314 scroll_up_aggressively
,
5315 doc
: /* Default value of `scroll-up-aggressively'.
5316 This value applies in buffers that don't have their own local values.
5317 This is the same as (default-value 'scroll-up-aggressively). */);
5319 DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively",
5320 scroll_down_aggressively
,
5321 doc
: /* Default value of `scroll-down-aggressively'.
5322 This value applies in buffers that don't have their own local values.
5323 This is the same as (default-value 'scroll-down-aggressively). */);
5325 DEFVAR_PER_BUFFER ("header-line-format",
5326 &BVAR (current_buffer
, header_line_format
),
5328 doc
: /* Analogous to `mode-line-format', but controls the header line.
5329 The header line appears, optionally, at the top of a window;
5330 the mode line appears at the bottom. */);
5332 DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer
, mode_line_format
),
5334 doc
: /* Template for displaying mode line for current buffer.
5335 Each buffer has its own value of this variable.
5336 Value may be nil, a string, a symbol or a list or cons cell.
5337 A value of nil means don't display a mode line.
5338 For a symbol, its value is used (but it is ignored if t or nil).
5339 A string appearing directly as the value of a symbol is processed verbatim
5340 in that the %-constructs below are not recognized.
5341 Note that unless the symbol is marked as a `risky-local-variable', all
5342 properties in any strings, as well as all :eval and :propertize forms
5343 in the value of that symbol will be ignored.
5344 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5345 is used as a mode line element. Be careful--FORM should not load any files,
5346 because that can cause an infinite recursion.
5347 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5348 with the specified properties PROPS applied.
5349 For a list whose car is a symbol, the symbol's value is taken,
5350 and if that is non-nil, the cadr of the list is processed recursively.
5351 Otherwise, the caddr of the list (if there is one) is processed.
5352 For a list whose car is a string or list, each element is processed
5353 recursively and the results are effectively concatenated.
5354 For a list whose car is an integer, the cdr of the list is processed
5355 and padded (if the number is positive) or truncated (if negative)
5356 to the width specified by that number.
5357 A string is printed verbatim in the mode line except for %-constructs:
5358 (%-constructs are allowed when the string is the entire mode-line-format
5359 or when it is found in a cons-cell or a list)
5360 %b -- print buffer name. %f -- print visited file name.
5361 %F -- print frame name.
5362 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5363 %& is like %*, but ignore read-only-ness.
5364 % means buffer is read-only and * means it is modified.
5365 For a modified read-only buffer, %* gives % and %+ gives *.
5366 %s -- print process status. %l -- print the current line number.
5367 %c -- print the current column number (this makes editing slower).
5368 To make the column number update correctly in all cases,
5369 `column-number-mode' must be non-nil.
5370 %i -- print the size of the buffer.
5371 %I -- like %i, but use k, M, G, etc., to abbreviate.
5372 %p -- print percent of buffer above top of window, or Top, Bot or All.
5373 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5374 or print Bottom or All.
5375 %n -- print Narrow if appropriate.
5376 %t -- visited file is text or binary (if OS supports this distinction).
5377 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5378 %Z -- like %z, but including the end-of-line format.
5379 %e -- print error message about full memory.
5380 %@ -- print @ or hyphen. @ means that default-directory is on a
5382 %[ -- print one [ for each recursive editing level. %] similar.
5383 %% -- print %. %- -- print infinitely many dashes.
5384 Decimal digits after the % specify field width to which to pad. */);
5386 DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode
,
5387 doc
: /* *Value of `major-mode' for new buffers. */);
5389 DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer
, major_mode
),
5390 make_number (Lisp_Symbol
),
5391 doc
: /* Symbol for current buffer's major mode.
5392 The default value (normally `fundamental-mode') affects new buffers.
5393 A value of nil means to use the current buffer's major mode, provided
5394 it is not marked as "special".
5396 When a mode is used by default, `find-file' switches to it before it
5397 reads the contents into the buffer and before it finishes setting up
5398 the buffer. Thus, the mode and its hooks should not expect certain
5399 variables such as `buffer-read-only' and `buffer-file-coding-system'
5402 DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer
, mode_name
),
5404 doc
: /* Pretty name of current buffer's major mode.
5405 Usually a string, but can use any of the constructs for `mode-line-format',
5407 Format with `format-mode-line' to produce a string value. */);
5409 DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer
, abbrev_table
), Qnil
,
5410 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5412 DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer
, abbrev_mode
), Qnil
,
5413 doc
: /* Non-nil if Abbrev mode is enabled.
5414 Use the command `abbrev-mode' to change this variable. */);
5416 DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer
, case_fold_search
),
5418 doc
: /* *Non-nil if searches and matches should ignore case. */);
5420 DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer
, fill_column
),
5421 make_number (LISP_INT_TAG
),
5422 doc
: /* *Column beyond which automatic line-wrapping should happen.
5423 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5425 DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer
, left_margin
),
5426 make_number (LISP_INT_TAG
),
5427 doc
: /* *Column for the default `indent-line-function' to indent to.
5428 Linefeed indents to this column in Fundamental mode. */);
5430 DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer
, tab_width
),
5431 make_number (LISP_INT_TAG
),
5432 doc
: /* *Distance between tab stops (for display of tab characters), in columns.
5433 This should be an integer greater than zero. */);
5435 DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer
, ctl_arrow
), Qnil
,
5436 doc
: /* *Non-nil means display control chars with uparrow.
5437 A value of nil means use backslash and octal digits.
5438 This variable does not apply to characters whose display is specified
5439 in the current display table (if there is one). */);
5441 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5442 &BVAR (current_buffer
, enable_multibyte_characters
),
5444 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5445 Otherwise they are regarded as unibyte. This affects the display,
5446 file I/O and the behavior of various editing commands.
5448 This variable is buffer-local but you cannot set it directly;
5449 use the function `set-buffer-multibyte' to change a buffer's representation.
5450 See also Info node `(elisp)Text Representations'. */);
5451 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5453 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5454 &BVAR (current_buffer
, buffer_file_coding_system
), Qnil
,
5455 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5456 This variable applies to saving the buffer, and also to `write-region'
5457 and other functions that use `write-region'.
5458 It does not apply to sending output to subprocesses, however.
5460 If this is nil, the buffer is saved without any code conversion
5461 unless some coding system is specified in `file-coding-system-alist'
5462 for the buffer file.
5464 If the text to be saved cannot be encoded as specified by this variable,
5465 an alternative encoding is selected by `select-safe-coding-system', which see.
5467 The variable `coding-system-for-write', if non-nil, overrides this variable.
5469 This variable is never applied to a way of decoding a file while reading it. */);
5471 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5472 &BVAR (current_buffer
, bidi_display_reordering
), Qnil
,
5473 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5475 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5476 &BVAR (current_buffer
, bidi_paragraph_direction
), Qnil
,
5477 doc
: /* *If non-nil, forces directionality of text paragraphs in the buffer.
5479 If this is nil (the default), the direction of each paragraph is
5480 determined by the first strong directional character of its text.
5481 The values of `right-to-left' and `left-to-right' override that.
5482 Any other value is treated as nil.
5484 This variable has no effect unless the buffer's value of
5485 \`bidi-display-reordering' is non-nil. */);
5487 DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer
, truncate_lines
), Qnil
,
5488 doc
: /* *Non-nil means do not display continuation lines.
5489 Instead, give each line of text just one screen line.
5491 Note that this is overridden by the variable
5492 `truncate-partial-width-windows' if that variable is non-nil
5493 and this buffer is not full-frame width.
5495 Minibuffers set this variable to nil. */);
5497 DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer
, word_wrap
), Qnil
,
5498 doc
: /* *Non-nil means to use word-wrapping for continuation lines.
5499 When word-wrapping is on, continuation lines are wrapped at the space
5500 or tab character nearest to the right window edge.
5501 If nil, continuation lines are wrapped at the right screen edge.
5503 This variable has no effect if long lines are truncated (see
5504 `truncate-lines' and `truncate-partial-width-windows'). If you use
5505 word-wrapping, you might want to reduce the value of
5506 `truncate-partial-width-windows', since wrapping can make text readable
5507 in narrower windows. */);
5509 DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer
, directory
),
5510 make_number (Lisp_String
),
5511 doc
: /* Name of default directory of current buffer. Should end with slash.
5512 To interactively change the default directory, use command `cd'. */);
5514 DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer
, auto_fill_function
),
5516 doc
: /* Function called (if non-nil) to perform auto-fill.
5517 It is called after self-inserting any character specified in
5518 the `auto-fill-chars' table.
5519 NOTE: This variable is not a hook;
5520 its value may not be a list of functions. */);
5522 DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer
, filename
),
5523 make_number (Lisp_String
),
5524 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5526 DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer
, file_truename
),
5527 make_number (Lisp_String
),
5528 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5529 The truename of a file is calculated by `file-truename'
5530 and then abbreviated with `abbreviate-file-name'. */);
5532 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5533 &BVAR (current_buffer
, auto_save_file_name
),
5534 make_number (Lisp_String
),
5535 doc
: /* Name of file for auto-saving current buffer.
5536 If it is nil, that means don't auto-save this buffer. */);
5538 DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer
, read_only
), Qnil
,
5539 doc
: /* Non-nil if this buffer is read-only. */);
5541 DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer
, backed_up
), Qnil
,
5542 doc
: /* Non-nil if this buffer's file has been backed up.
5543 Backing up is done before the first time the file is saved. */);
5545 DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer
, save_length
),
5546 make_number (LISP_INT_TAG
),
5547 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5549 -1 means auto-saving turned off until next real save.
5551 If you set this to -2, that means don't turn off auto-saving in this buffer
5552 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5553 you probably should set this to -2 in that buffer. */);
5555 DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer
, selective_display
),
5557 doc
: /* Non-nil enables selective display.
5558 An integer N as value means display only lines
5559 that start with less than N columns of space.
5560 A value of t means that the character ^M makes itself and
5561 all the rest of the line invisible; also, when saving the buffer
5562 in a file, save the ^M as a newline. */);
5565 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5566 &BVAR (current_buffer
, selective_display_ellipses
),
5568 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5571 DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer
, overwrite_mode
), Qnil
,
5572 doc
: /* Non-nil if self-insertion should replace existing text.
5573 The value should be one of `overwrite-mode-textual',
5574 `overwrite-mode-binary', or nil.
5575 If it is `overwrite-mode-textual', self-insertion still
5576 inserts at the end of a line, and inserts when point is before a tab,
5577 until the tab is filled in.
5578 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5580 DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer
, display_table
),
5582 doc
: /* Display table that controls display of the contents of current buffer.
5584 If this variable is nil, the value of `standard-display-table' is used.
5585 Each window can have its own, overriding display table, see
5586 `set-window-display-table' and `window-display-table'.
5588 The display table is a char-table created with `make-display-table'.
5589 A char-table is an array indexed by character codes. Normal array
5590 primitives `aref' and `aset' can be used to access elements of a char-table.
5592 Each of the char-table elements control how to display the corresponding
5593 text character: the element at index C in the table says how to display
5594 the character whose code is C. Each element should be a vector of
5595 characters or nil. The value nil means display the character in the
5596 default fashion; otherwise, the characters from the vector are delivered
5597 to the screen instead of the original character.
5599 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5600 to display a capital Y instead of each X character.
5602 In addition, a char-table has six extra slots to control the display of:
5604 the end of a truncated screen line (extra-slot 0, a single character);
5605 the end of a continued line (extra-slot 1, a single character);
5606 the escape character used to display character codes in octal
5607 (extra-slot 2, a single character);
5608 the character used as an arrow for control characters (extra-slot 3,
5609 a single character);
5610 the decoration indicating the presence of invisible lines (extra-slot 4,
5611 a vector of characters);
5612 the character used to draw the border between side-by-side windows
5613 (extra-slot 5, a single character).
5615 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5617 DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer
, left_margin_cols
),
5619 doc
: /* *Width of left marginal area for display of a buffer.
5620 A value of nil means no marginal area. */);
5622 DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer
, right_margin_cols
),
5624 doc
: /* *Width of right marginal area for display of a buffer.
5625 A value of nil means no marginal area. */);
5627 DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer
, left_fringe_width
),
5629 doc
: /* *Width of this buffer's left fringe (in pixels).
5630 A value of 0 means no left fringe is shown in this buffer's window.
5631 A value of nil means to use the left fringe width from the window's frame. */);
5633 DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer
, right_fringe_width
),
5635 doc
: /* *Width of this buffer's right fringe (in pixels).
5636 A value of 0 means no right fringe is shown in this buffer's window.
5637 A value of nil means to use the right fringe width from the window's frame. */);
5639 DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer
, fringes_outside_margins
),
5641 doc
: /* *Non-nil means to display fringes outside display margins.
5642 A value of nil means to display fringes between margins and buffer text. */);
5644 DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer
, scroll_bar_width
),
5646 doc
: /* *Width of this buffer's scroll bars in pixels.
5647 A value of nil means to use the scroll bar width from the window's frame. */);
5649 DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer
, vertical_scroll_bar_type
),
5651 doc
: /* *Position of this buffer's vertical scroll bar.
5652 The value takes effect whenever you tell a window to display this buffer;
5653 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5655 A value of `left' or `right' means put the vertical scroll bar at that side
5656 of the window; a value of nil means don't show any vertical scroll bars.
5657 A value of t (the default) means do whatever the window's frame specifies. */);
5659 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5660 &BVAR (current_buffer
, indicate_empty_lines
), Qnil
,
5661 doc
: /* *Visually indicate empty lines after the buffer end.
5662 If non-nil, a bitmap is displayed in the left fringe of a window on
5663 window-systems. */);
5665 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5666 &BVAR (current_buffer
, indicate_buffer_boundaries
), Qnil
,
5667 doc
: /* *Visually indicate buffer boundaries and scrolling.
5668 If non-nil, the first and last line of the buffer are marked in the fringe
5669 of a window on window-systems with angle bitmaps, or if the window can be
5670 scrolled, the top and bottom line of the window are marked with up and down
5673 If value is a symbol `left' or `right', both angle and arrow bitmaps
5674 are displayed in the left or right fringe, resp. Any other value
5675 that doesn't look like an alist means display the angle bitmaps in
5676 the left fringe but no arrows.
5678 You can exercise more precise control by using an alist as the
5679 value. Each alist element (INDICATOR . POSITION) specifies
5680 where to show one of the indicators. INDICATOR is one of `top',
5681 `bottom', `up', `down', or t, which specifies the default position,
5682 and POSITION is one of `left', `right', or nil, meaning do not show
5685 For example, ((top . left) (t . right)) places the top angle bitmap in
5686 left fringe, the bottom angle bitmap in right fringe, and both arrow
5687 bitmaps in right fringe. To show just the angle bitmaps in the left
5688 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5690 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5691 &BVAR (current_buffer
, fringe_indicator_alist
), Qnil
,
5692 doc
: /* *Mapping from logical to physical fringe indicator bitmaps.
5693 The value is an alist where each element (INDICATOR . BITMAPS)
5694 specifies the fringe bitmaps used to display a specific logical
5697 INDICATOR specifies the logical indicator type which is one of the
5698 following symbols: `truncation' , `continuation', `overlay-arrow',
5699 `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'.
5701 BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5702 the actual bitmap shown in the left or right fringe for the logical
5703 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5704 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5705 are used only for the `bottom' and `top-bottom' indicators when the
5706 last (only) line has no final newline. BITMAPS may also be a single
5707 symbol which is used in both left and right fringes. */);
5709 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5710 &BVAR (current_buffer
, fringe_cursor_alist
), Qnil
,
5711 doc
: /* *Mapping from logical to physical fringe cursor bitmaps.
5712 The value is an alist where each element (CURSOR . BITMAP)
5713 specifies the fringe bitmaps used to display a specific logical
5714 cursor type in the fringe.
5716 CURSOR specifies the logical cursor type which is one of the following
5717 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5718 one is used to show a hollow cursor on narrow lines display lines
5719 where the normal hollow cursor will not fit.
5721 BITMAP is the corresponding fringe bitmap shown for the logical
5724 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5725 &BVAR (current_buffer
, scroll_up_aggressively
), Qnil
,
5726 doc
: /* How far to scroll windows upward.
5727 If you move point off the bottom, the window scrolls automatically.
5728 This variable controls how far it scrolls. The value nil, the default,
5729 means scroll to center point. A fraction means scroll to put point
5730 that fraction of the window's height from the bottom of the window.
5731 When the value is 0.0, point goes at the bottom line, which in the
5732 simple case that you moved off with C-f means scrolling just one line.
5733 1.0 means point goes at the top, so that in that simple case, the
5734 window scrolls by a full window height. Meaningful values are
5735 between 0.0 and 1.0, inclusive. */);
5737 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5738 &BVAR (current_buffer
, scroll_down_aggressively
), Qnil
,
5739 doc
: /* How far to scroll windows downward.
5740 If you move point off the top, the window scrolls automatically.
5741 This variable controls how far it scrolls. The value nil, the default,
5742 means scroll to center point. A fraction means scroll to put point
5743 that fraction of the window's height from the top of the window.
5744 When the value is 0.0, point goes at the top line, which in the
5745 simple case that you moved off with C-b means scrolling just one line.
5746 1.0 means point goes at the bottom, so that in that simple case, the
5747 window scrolls by a full window height. Meaningful values are
5748 between 0.0 and 1.0, inclusive. */);
5750 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5754 DEFVAR_LISP ("before-change-functions", Vbefore_change_functions
,
5755 doc
: /* List of functions to call before each text change.
5756 Two arguments are passed to each function: the positions of
5757 the beginning and end of the range of old text to be changed.
5758 \(For an insertion, the beginning and end are at the same place.)
5759 No information is given about the length of the text after the change.
5761 Buffer changes made while executing the `before-change-functions'
5762 don't call any before-change or after-change functions.
5763 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5765 If an unhandled error happens in running these functions,
5766 the variable's value remains nil. That prevents the error
5767 from happening repeatedly and making Emacs nonfunctional. */);
5768 Vbefore_change_functions
= Qnil
;
5770 DEFVAR_LISP ("after-change-functions", Vafter_change_functions
,
5771 doc
: /* List of functions to call after each text change.
5772 Three arguments are passed to each function: the positions of
5773 the beginning and end of the range of changed text,
5774 and the length in bytes of the pre-change text replaced by that range.
5775 \(For an insertion, the pre-change length is zero;
5776 for a deletion, that length is the number of bytes deleted,
5777 and the post-change beginning and end are at the same place.)
5779 Buffer changes made while executing the `after-change-functions'
5780 don't call any before-change or after-change functions.
5781 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5783 If an unhandled error happens in running these functions,
5784 the variable's value remains nil. That prevents the error
5785 from happening repeatedly and making Emacs nonfunctional. */);
5786 Vafter_change_functions
= Qnil
;
5788 DEFVAR_LISP ("first-change-hook", Vfirst_change_hook
,
5789 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5790 The functions are run using the `run-hooks' function. */);
5791 Vfirst_change_hook
= Qnil
;
5793 DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer
, undo_list
), Qnil
,
5794 doc
: /* List of undo entries in current buffer.
5795 Recent changes come first; older changes follow newer.
5797 An entry (BEG . END) represents an insertion which begins at
5798 position BEG and ends at position END.
5800 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5801 from (abs POSITION). If POSITION is positive, point was at the front
5802 of the text being deleted; if negative, point was at the end.
5804 An entry (t HIGH . LOW) indicates that the buffer previously had
5805 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5806 of the visited file's modification time, as of that time. If the
5807 modification time of the most recent save is different, this entry is
5810 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5811 was modified between BEG and END. PROPERTY is the property name,
5812 and VALUE is the old value.
5814 An entry (apply FUN-NAME . ARGS) means undo the change with
5815 \(apply FUN-NAME ARGS).
5817 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5818 in the active region. BEG and END is the range affected by this entry
5819 and DELTA is the number of bytes added or deleted in that range by
5822 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5823 was adjusted in position by the offset DISTANCE (an integer).
5825 An entry of the form POSITION indicates that point was at the buffer
5826 location given by the integer. Undoing an entry of this form places
5829 Entries with value `nil' mark undo boundaries. The undo command treats
5830 the changes between two undo boundaries as a single step to be undone.
5832 If the value of the variable is t, undo information is not recorded. */);
5834 DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer
, mark_active
), Qnil
,
5835 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5837 DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer
, cache_long_line_scans
), Qnil
,
5838 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5840 Normally, the line-motion functions work by scanning the buffer for
5841 newlines. Columnar operations (like `move-to-column' and
5842 `compute-motion') also work by scanning the buffer, summing character
5843 widths as they go. This works well for ordinary text, but if the
5844 buffer's lines are very long (say, more than 500 characters), these
5845 motion functions will take longer to execute. Emacs may also take
5846 longer to update the display.
5848 If `cache-long-line-scans' is non-nil, these motion functions cache the
5849 results of their scans, and consult the cache to avoid rescanning
5850 regions of the buffer until the text is modified. The caches are most
5851 beneficial when they prevent the most searching---that is, when the
5852 buffer contains long lines and large regions of characters with the
5853 same, fixed screen width.
5855 When `cache-long-line-scans' is non-nil, processing short lines will
5856 become slightly slower (because of the overhead of consulting the
5857 cache), and the caches will use memory roughly proportional to the
5858 number of newlines and characters whose screen width varies.
5860 The caches require no explicit maintenance; their accuracy is
5861 maintained internally by the Emacs primitives. Enabling or disabling
5862 the cache should not affect the behavior of any of the motion
5863 functions; it should only affect their performance. */);
5865 DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer
, point_before_scroll
), Qnil
,
5866 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5868 DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer
, file_format
), Qnil
,
5869 doc
: /* List of formats to use when saving this buffer.
5870 Formats are defined by `format-alist'. This variable is
5871 set when a file is visited. */);
5873 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5874 &BVAR (current_buffer
, auto_save_file_format
), Qnil
,
5875 doc
: /* *Format in which to write auto-save files.
5876 Should be a list of symbols naming formats that are defined in `format-alist'.
5877 If it is t, which is the default, auto-save files are written in the
5878 same format as a regular save would use. */);
5880 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5881 &BVAR (current_buffer
, invisibility_spec
), Qnil
,
5882 doc
: /* Invisibility spec of this buffer.
5883 The default is t, which means that text is invisible
5884 if it has a non-nil `invisible' property.
5885 If the value is a list, a text character is invisible if its `invisible'
5886 property is an element in that list (or is a list with members in common).
5887 If an element is a cons cell of the form (PROP . ELLIPSIS),
5888 then characters with property value PROP are invisible,
5889 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5891 DEFVAR_PER_BUFFER ("buffer-display-count",
5892 &BVAR (current_buffer
, display_count
), Qnil
,
5893 doc
: /* A number incremented each time this buffer is displayed in a window.
5894 The function `set-window-buffer' increments it. */);
5896 DEFVAR_PER_BUFFER ("buffer-display-time",
5897 &BVAR (current_buffer
, display_time
), Qnil
,
5898 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5899 The function `set-window-buffer' updates this variable
5900 to the value obtained by calling `current-time'.
5901 If the buffer has never been shown in a window, the value is nil. */);
5903 DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode
,
5904 doc
: /* Non-nil if Transient Mark mode is enabled.
5905 See the command `transient-mark-mode' for a description of this minor mode.
5907 Non-nil also enables highlighting of the region whenever the mark is active.
5908 The variable `highlight-nonselected-windows' controls whether to highlight
5909 all windows or just the selected window.
5911 Lisp programs may give this variable certain special values:
5913 - A value of `lambda' enables Transient Mark mode temporarily.
5914 It is disabled again after any subsequent action that would
5915 normally deactivate the mark (e.g. buffer modification).
5917 - A value of (only . OLDVAL) enables Transient Mark mode
5918 temporarily. After any subsequent point motion command that is
5919 not shift-translated, or any other action that would normally
5920 deactivate the mark (e.g. buffer modification), the value of
5921 `transient-mark-mode' is set to OLDVAL. */);
5922 Vtransient_mark_mode
= Qnil
;
5924 DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only
,
5925 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5926 If the value is t, disregard `buffer-read-only' and all `read-only'
5927 text properties. If the value is a list, disregard `buffer-read-only'
5928 and disregard a `read-only' text property if the property value
5929 is a member of the list. */);
5930 Vinhibit_read_only
= Qnil
;
5932 DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer
, cursor_type
), Qnil
,
5933 doc
: /* Cursor to use when this buffer is in the selected window.
5934 Values are interpreted as follows:
5936 t use the cursor specified for the frame
5937 nil don't display a cursor
5938 box display a filled box cursor
5939 hollow display a hollow box cursor
5940 bar display a vertical bar cursor with default width
5941 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5942 hbar display a horizontal bar cursor with default height
5943 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
5944 ANYTHING ELSE display a hollow box cursor
5946 When the buffer is displayed in a non-selected window, the
5947 cursor's appearance is instead controlled by the variable
5948 `cursor-in-non-selected-windows'. */);
5950 DEFVAR_PER_BUFFER ("line-spacing",
5951 &BVAR (current_buffer
, extra_line_spacing
), Qnil
,
5952 doc
: /* Additional space to put between lines when displaying a buffer.
5953 The space is measured in pixels, and put below lines on graphic displays,
5954 see `display-graphic-p'.
5955 If value is a floating point number, it specifies the spacing relative
5956 to the default frame line height. A value of nil means add no extra space. */);
5958 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
5959 &BVAR (current_buffer
, cursor_in_non_selected_windows
), Qnil
,
5960 doc
: /* *Non-nil means show a cursor in non-selected windows.
5961 If nil, only shows a cursor in the selected window.
5962 If t, displays a cursor related to the usual cursor type
5963 \(a solid box becomes hollow, a bar becomes a narrower bar).
5964 You can also specify the cursor type as in the `cursor-type' variable.
5965 Use Custom to set this variable and update the display." */);
5967 DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions
,
5968 doc
: /* List of functions called with no args to query before killing a buffer.
5969 The buffer being killed will be current while the functions are running.
5970 If any of them returns nil, the buffer is not killed. */);
5971 Vkill_buffer_query_functions
= Qnil
;
5973 DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook
,
5974 doc
: /* Normal hook run before changing the major mode of a buffer.
5975 The function `kill-all-local-variables' runs this before doing anything else. */);
5976 Vchange_major_mode_hook
= Qnil
;
5977 DEFSYM (Qchange_major_mode_hook
, "change-major-mode-hook");
5979 DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook
,
5980 doc
: /* Hook run when the buffer list changes.
5981 Functions running this hook are `get-buffer-create',
5982 `make-indirect-buffer', `rename-buffer', `kill-buffer',
5983 `record-buffer' and `unrecord-buffer'. */);
5984 Vbuffer_list_update_hook
= Qnil
;
5985 DEFSYM (Qbuffer_list_update_hook
, "buffer-list-update-hook");
5987 defsubr (&Sbuffer_live_p
);
5988 defsubr (&Sbuffer_list
);
5989 defsubr (&Sget_buffer
);
5990 defsubr (&Sget_file_buffer
);
5991 defsubr (&Sget_buffer_create
);
5992 defsubr (&Smake_indirect_buffer
);
5993 defsubr (&Sgenerate_new_buffer_name
);
5994 defsubr (&Sbuffer_name
);
5995 /*defsubr (&Sbuffer_number);*/
5996 defsubr (&Sbuffer_file_name
);
5997 defsubr (&Sbuffer_base_buffer
);
5998 defsubr (&Sbuffer_local_value
);
5999 defsubr (&Sbuffer_local_variables
);
6000 defsubr (&Sbuffer_modified_p
);
6001 defsubr (&Sset_buffer_modified_p
);
6002 defsubr (&Sbuffer_modified_tick
);
6003 defsubr (&Sbuffer_chars_modified_tick
);
6004 defsubr (&Srename_buffer
);
6005 defsubr (&Sother_buffer
);
6006 defsubr (&Sbuffer_enable_undo
);
6007 defsubr (&Skill_buffer
);
6008 defsubr (&Sbury_buffer_internal
);
6009 defsubr (&Sset_buffer_major_mode
);
6010 defsubr (&Scurrent_buffer
);
6011 defsubr (&Sset_buffer
);
6012 defsubr (&Sbarf_if_buffer_read_only
);
6013 defsubr (&Serase_buffer
);
6014 defsubr (&Sbuffer_swap_text
);
6015 defsubr (&Sset_buffer_multibyte
);
6016 defsubr (&Skill_all_local_variables
);
6018 defsubr (&Soverlayp
);
6019 defsubr (&Smake_overlay
);
6020 defsubr (&Sdelete_overlay
);
6021 defsubr (&Smove_overlay
);
6022 defsubr (&Soverlay_start
);
6023 defsubr (&Soverlay_end
);
6024 defsubr (&Soverlay_buffer
);
6025 defsubr (&Soverlay_properties
);
6026 defsubr (&Soverlays_at
);
6027 defsubr (&Soverlays_in
);
6028 defsubr (&Snext_overlay_change
);
6029 defsubr (&Sprevious_overlay_change
);
6030 defsubr (&Soverlay_recenter
);
6031 defsubr (&Soverlay_lists
);
6032 defsubr (&Soverlay_get
);
6033 defsubr (&Soverlay_put
);
6034 defsubr (&Srestore_buffer_modified_p
);
6038 keys_of_buffer (void)
6040 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6041 initial_define_key (control_x_map
, 'k', "kill-buffer");
6043 /* This must not be in syms_of_buffer, because Qdisabled is not
6044 initialized when that function gets called. */
6045 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);