1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include <sys/types.h>
26 #include <sys/param.h>
35 /* in 4.1, param.h fails to define this. */
36 #define MAXPATHLEN 1024
37 #endif /* not MAXPATHLEN */
44 #include "intervals.h"
49 #include "region-cache.h"
51 #include "blockinput.h"
56 struct buffer
*current_buffer
; /* the current buffer */
58 /* First buffer in chain of all buffers (in reverse order of creation).
59 Threaded through ->next. */
61 struct buffer
*all_buffers
;
63 /* This structure holds the default values of the buffer-local variables
64 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
65 The default value occupies the same slot in this structure
66 as an individual buffer's value occupies in that buffer.
67 Setting the default value also goes through the alist of buffers
68 and stores into each buffer that does not say it has a local value. */
70 struct buffer buffer_defaults
;
72 /* A Lisp_Object pointer to the above, used for staticpro */
74 static Lisp_Object Vbuffer_defaults
;
76 /* This structure marks which slots in a buffer have corresponding
77 default values in buffer_defaults.
78 Each such slot has a nonzero value in this structure.
79 The value has only one nonzero bit.
81 When a buffer has its own local value for a slot,
82 the entry for that slot (found in the same slot in this structure)
83 is turned on in the buffer's local_flags array.
85 If a slot in this structure is -1, then even though there may
86 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
87 and the corresponding slot in buffer_defaults is not used.
89 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
90 but there is a default value which is copied into each buffer.
92 If a slot in this structure is negative, then even though there may
93 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
94 and the corresponding slot in buffer_defaults is not used.
96 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
97 zero, that is a bug */
99 struct buffer buffer_local_flags
;
101 /* This structure holds the names of symbols whose values may be
102 buffer-local. It is indexed and accessed in the same way as the above. */
104 struct buffer buffer_local_symbols
;
105 /* A Lisp_Object pointer to the above, used for staticpro */
106 static Lisp_Object Vbuffer_local_symbols
;
108 /* This structure holds the required types for the values in the
109 buffer-local slots. If a slot contains Qnil, then the
110 corresponding buffer slot may contain a value of any type. If a
111 slot contains an integer, then prospective values' tags must be
112 equal to that integer (except nil is always allowed).
113 When a tag does not match, the function
114 buffer_slot_type_mismatch will signal an error.
116 If a slot here contains -1, the corresponding variable is read-only. */
117 struct buffer buffer_local_types
;
119 /* Flags indicating which built-in buffer-local variables
120 are permanent locals. */
121 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
123 /* Number of per-buffer variables used. */
125 int last_per_buffer_idx
;
127 Lisp_Object
Fset_buffer ();
128 void set_buffer_internal ();
129 void set_buffer_internal_1 ();
130 static void call_overlay_mod_hooks ();
131 static void swap_out_buffer_local_variables ();
132 static void reset_buffer_local_variables ();
134 /* Alist of all buffer names vs the buffers. */
135 /* This used to be a variable, but is no longer,
136 to prevent lossage due to user rplac'ing this alist or its elements. */
137 Lisp_Object Vbuffer_alist
;
139 /* Functions to call before and after each text change. */
140 Lisp_Object Vbefore_change_functions
;
141 Lisp_Object Vafter_change_functions
;
143 Lisp_Object Vtransient_mark_mode
;
145 /* t means ignore all read-only text properties.
146 A list means ignore such a property if its value is a member of the list.
147 Any non-nil value means ignore buffer-read-only. */
148 Lisp_Object Vinhibit_read_only
;
150 /* List of functions to call that can query about killing a buffer.
151 If any of these functions returns nil, we don't kill it. */
152 Lisp_Object Vkill_buffer_query_functions
;
154 /* List of functions to call before changing an unmodified buffer. */
155 Lisp_Object Vfirst_change_hook
;
157 Lisp_Object Qfirst_change_hook
;
158 Lisp_Object Qbefore_change_functions
;
159 Lisp_Object Qafter_change_functions
;
161 /* If nonzero, all modification hooks are suppressed. */
162 int inhibit_modification_hooks
;
164 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
166 Lisp_Object Qprotected_field
;
168 Lisp_Object QSFundamental
; /* A string "Fundamental" */
170 Lisp_Object Qkill_buffer_hook
;
172 Lisp_Object Qget_file_buffer
;
174 Lisp_Object Qoverlayp
;
176 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
178 Lisp_Object Qmodification_hooks
;
179 Lisp_Object Qinsert_in_front_hooks
;
180 Lisp_Object Qinsert_behind_hooks
;
182 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
183 static void free_buffer_text
P_ ((struct buffer
*b
));
184 static Lisp_Object copy_overlays
P_ ((struct buffer
*, Lisp_Object
));
185 static void modify_overlay
P_ ((struct buffer
*, int, int));
188 /* For debugging; temporary. See set_buffer_internal. */
189 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
196 error ("No buffer named %s", XSTRING (spec
)->data
);
197 error ("Invalid buffer argument");
200 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
201 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
202 Value is nil if OBJECT is not a buffer or if it has been killed. */)
206 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
210 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
211 doc
: /* Return a list of all existing live buffers.
212 If the optional arg FRAME is a frame, we return that frame's buffer list. */)
216 Lisp_Object framelist
, general
;
217 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
225 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
227 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
229 while (! NILP (tail
))
231 general
= Fdelq (XCAR (tail
), general
);
234 return nconc2 (framelist
, general
);
240 /* Like Fassoc, but use Fstring_equal to compare
241 (which ignores text properties),
242 and don't ever QUIT. */
245 assoc_ignore_text_properties (key
, list
)
246 register Lisp_Object key
;
249 register Lisp_Object tail
;
250 for (tail
= list
; !NILP (tail
); tail
= Fcdr (tail
))
252 register Lisp_Object elt
, tem
;
254 tem
= Fstring_equal (Fcar (elt
), key
);
261 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
262 doc
: /* Return the buffer named NAME (a string).
263 If there is no live buffer named NAME, return nil.
264 NAME may also be a buffer; if so, the value is that buffer. */)
266 register Lisp_Object name
;
272 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
275 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
276 doc
: /* Return the buffer visiting file FILENAME (a string).
277 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
278 If there is no such live buffer, return nil.
279 See also `find-buffer-visiting'. */)
281 register Lisp_Object filename
;
283 register Lisp_Object tail
, buf
, tem
;
286 CHECK_STRING (filename
);
287 filename
= Fexpand_file_name (filename
, Qnil
);
289 /* If the file name has special constructs in it,
290 call the corresponding file handler. */
291 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
293 return call2 (handler
, Qget_file_buffer
, filename
);
295 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
297 buf
= Fcdr (XCAR (tail
));
298 if (!BUFFERP (buf
)) continue;
299 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
300 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
308 get_truename_buffer (filename
)
309 register Lisp_Object filename
;
311 register Lisp_Object tail
, buf
, tem
;
313 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
315 buf
= Fcdr (XCAR (tail
));
316 if (!BUFFERP (buf
)) continue;
317 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
318 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
325 /* Incremented for each buffer created, to assign the buffer number. */
328 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
329 doc
: /* Return the buffer named NAME, or create such a buffer and return it.
330 A new buffer is created if there is no live buffer named NAME.
331 If NAME starts with a space, the new buffer does not keep undo information.
332 If NAME is a buffer instead of a string, then it is the value returned.
333 The value is never nil. */)
335 register Lisp_Object name
;
337 register Lisp_Object buf
;
338 register struct buffer
*b
;
340 buf
= Fget_buffer (name
);
344 if (XSTRING (name
)->size
== 0)
345 error ("Empty string for buffer name is not allowed");
347 b
= (struct buffer
*) allocate_buffer ();
349 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
351 /* An ordinary buffer uses its own struct buffer_text. */
352 b
->text
= &b
->own_text
;
355 BUF_GAP_SIZE (b
) = 20;
357 /* We allocate extra 1-byte at the tail and keep it always '\0' for
358 anchoring a search. */
359 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
361 if (! BUF_BEG_ADDR (b
))
362 buffer_memory_full ();
370 BUF_GPT_BYTE (b
) = 1;
371 BUF_BEGV_BYTE (b
) = 1;
375 BUF_OVERLAY_MODIFF (b
) = 1;
376 BUF_SAVE_MODIFF (b
) = 1;
377 BUF_INTERVALS (b
) = 0;
378 BUF_UNCHANGED_MODIFIED (b
) = 1;
379 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
380 BUF_END_UNCHANGED (b
) = 0;
381 BUF_BEG_UNCHANGED (b
) = 0;
382 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
384 b
->newline_cache
= 0;
385 b
->width_run_cache
= 0;
386 b
->width_table
= Qnil
;
387 b
->prevent_redisplay_optimizations_p
= 1;
389 /* Put this on the chain of all buffers including killed ones. */
390 b
->next
= all_buffers
;
393 /* An ordinary buffer normally doesn't need markers
394 to handle BEGV and ZV. */
396 b
->begv_marker
= Qnil
;
399 name
= Fcopy_sequence (name
);
400 XSTRING (name
)->intervals
= NULL_INTERVAL
;
403 if (XSTRING (name
)->data
[0] != ' ')
409 reset_buffer_local_variables (b
, 1);
411 /* Put this in the alist of all live buffers. */
413 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
415 b
->mark
= Fmake_marker ();
416 BUF_MARKERS (b
) = Qnil
;
422 /* Return a list of overlays which is a copy of the overlay list
423 LIST, but for buffer B. */
426 copy_overlays (b
, list
)
430 Lisp_Object result
, buffer
;
432 XSETBUFFER (buffer
, b
);
434 for (result
= Qnil
; CONSP (list
); list
= XCDR (list
))
436 Lisp_Object overlay
, start
, end
, old_overlay
;
439 old_overlay
= XCAR (list
);
440 charpos
= marker_position (OVERLAY_START (old_overlay
));
441 start
= Fmake_marker ();
442 Fset_marker (start
, make_number (charpos
), buffer
);
443 XMARKER (start
)->insertion_type
444 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
446 charpos
= marker_position (OVERLAY_END (old_overlay
));
447 end
= Fmake_marker ();
448 Fset_marker (end
, make_number (charpos
), buffer
);
449 XMARKER (end
)->insertion_type
450 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
452 overlay
= allocate_misc ();
453 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
454 OVERLAY_START (overlay
) = start
;
455 OVERLAY_END (overlay
) = end
;
456 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
458 result
= Fcons (overlay
, result
);
461 return Fnreverse (result
);
465 /* Clone per-buffer values of buffer FROM.
467 Buffer TO gets the same per-buffer values as FROM, with the
468 following exceptions: (1) TO's name is left untouched, (2) markers
469 are copied and made to refer to TO, and (3) overlay lists are
473 clone_per_buffer_values (from
, to
)
474 struct buffer
*from
, *to
;
476 Lisp_Object to_buffer
;
479 XSETBUFFER (to_buffer
, to
);
481 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
483 offset
+= sizeof (Lisp_Object
))
487 obj
= PER_BUFFER_VALUE (from
, offset
);
490 struct Lisp_Marker
*m
= XMARKER (obj
);
491 obj
= Fmake_marker ();
492 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
493 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
496 PER_BUFFER_VALUE (to
, offset
) = obj
;
499 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
501 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
502 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
506 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
508 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
509 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
510 BASE-BUFFER should be an existing buffer (or buffer name).
511 NAME should be a string which is not the name of an existing buffer.
512 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
513 such as major and minor modes, in the indirect buffer.
514 CLONE nil means the indirect buffer's state is reset to default values. */)
515 (base_buffer
, name
, clone
)
516 Lisp_Object base_buffer
, name
, clone
;
521 buf
= Fget_buffer (name
);
523 error ("Buffer name `%s' is in use", XSTRING (name
)->data
);
525 base_buffer
= Fget_buffer (base_buffer
);
526 if (NILP (base_buffer
))
527 error ("No such buffer: `%s'", XSTRING (name
)->data
);
529 if (XSTRING (name
)->size
== 0)
530 error ("Empty string for buffer name is not allowed");
532 b
= (struct buffer
*) allocate_buffer ();
533 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
535 if (XBUFFER (base_buffer
)->base_buffer
)
536 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
538 b
->base_buffer
= XBUFFER (base_buffer
);
540 /* Use the base buffer's text object. */
541 b
->text
= b
->base_buffer
->text
;
543 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
544 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
545 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
546 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
547 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
548 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
550 b
->newline_cache
= 0;
551 b
->width_run_cache
= 0;
552 b
->width_table
= Qnil
;
554 /* Put this on the chain of all buffers including killed ones. */
555 b
->next
= all_buffers
;
558 name
= Fcopy_sequence (name
);
559 XSTRING (name
)->intervals
= NULL_INTERVAL
;
563 reset_buffer_local_variables (b
, 1);
565 /* Put this in the alist of all live buffers. */
567 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
569 b
->mark
= Fmake_marker ();
572 /* The multibyte status belongs to the base buffer. */
573 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
575 /* Make sure the base buffer has markers for its narrowing. */
576 if (NILP (b
->base_buffer
->pt_marker
))
578 b
->base_buffer
->pt_marker
= Fmake_marker ();
579 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
580 BUF_PT (b
->base_buffer
),
581 BUF_PT_BYTE (b
->base_buffer
));
583 if (NILP (b
->base_buffer
->begv_marker
))
585 b
->base_buffer
->begv_marker
= Fmake_marker ();
586 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
587 BUF_BEGV (b
->base_buffer
),
588 BUF_BEGV_BYTE (b
->base_buffer
));
590 if (NILP (b
->base_buffer
->zv_marker
))
592 b
->base_buffer
->zv_marker
= Fmake_marker ();
593 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
594 BUF_ZV (b
->base_buffer
),
595 BUF_ZV_BYTE (b
->base_buffer
));
596 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
601 /* Give the indirect buffer markers for its narrowing. */
602 b
->pt_marker
= Fmake_marker ();
603 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
604 b
->begv_marker
= Fmake_marker ();
605 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
606 b
->zv_marker
= Fmake_marker ();
607 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
608 XMARKER (b
->zv_marker
)->insertion_type
= 1;
611 clone_per_buffer_values (b
->base_buffer
, b
);
616 /* Reinitialize everything about a buffer except its name and contents
617 and local variables. */
621 register struct buffer
*b
;
624 b
->file_truename
= Qnil
;
625 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
627 XSETFASTINT (b
->save_length
, 0);
628 b
->last_window_start
= 1;
629 /* It is more conservative to start out "changed" than "unchanged". */
631 b
->prevent_redisplay_optimizations_p
= 1;
633 b
->auto_save_modified
= 0;
634 b
->auto_save_failure_time
= -1;
635 b
->auto_save_file_name
= Qnil
;
637 b
->overlays_before
= Qnil
;
638 b
->overlays_after
= Qnil
;
639 XSETFASTINT (b
->overlay_center
, 1);
640 b
->mark_active
= Qnil
;
641 b
->point_before_scroll
= Qnil
;
642 b
->file_format
= Qnil
;
643 b
->last_selected_window
= Qnil
;
644 XSETINT (b
->display_count
, 0);
645 b
->display_time
= Qnil
;
646 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
647 b
->cursor_type
= buffer_defaults
.cursor_type
;
648 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
650 b
->display_error_modiff
= 0;
653 /* Reset buffer B's local variables info.
654 Don't use this on a buffer that has already been in use;
655 it does not treat permanent locals consistently.
656 Instead, use Fkill_all_local_variables.
658 If PERMANENT_TOO is 1, then we reset permanent built-in
659 buffer-local variables. If PERMANENT_TOO is 0,
660 we preserve those. */
663 reset_buffer_local_variables (b
, permanent_too
)
664 register struct buffer
*b
;
670 /* Reset the major mode to Fundamental, together with all the
671 things that depend on the major mode.
672 default-major-mode is handled at a higher level.
673 We ignore it here. */
674 b
->major_mode
= Qfundamental_mode
;
676 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
677 b
->mode_name
= QSFundamental
;
678 b
->minor_modes
= Qnil
;
680 /* If the standard case table has been altered and invalidated,
681 fix up its insides first. */
682 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
683 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
684 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
685 Fset_standard_case_table (Vascii_downcase_table
);
687 b
->downcase_table
= Vascii_downcase_table
;
688 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
689 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
690 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
691 b
->invisibility_spec
= Qt
;
693 b
->buffer_file_type
= Qnil
;
697 b
->sort_table
= XSTRING (Vascii_sort_table
);
698 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
701 /* Reset all (or most) per-buffer variables to their defaults. */
702 b
->local_var_alist
= Qnil
;
703 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
704 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
705 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
707 /* For each slot that has a default value,
708 copy that into the slot. */
710 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
712 offset
+= sizeof (Lisp_Object
))
714 int idx
= PER_BUFFER_IDX (offset
);
717 || buffer_permanent_local_flags
[idx
] == 0))
718 /* Is -2 used anywhere? */
720 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
724 /* We split this away from generate-new-buffer, because rename-buffer
725 and set-visited-file-name ought to be able to use this to really
726 rename the buffer properly. */
728 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
730 doc
: /* Return a string that is the name of no existing buffer based on NAME.
731 If there is no live buffer named NAME, then return NAME.
732 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
733 until an unused name is found, and then return that name.
734 Optional second argument IGNORE specifies a name that is okay to use
735 \(if it is in the sequence to be tried)
736 even if a buffer with that name exists. */)
738 register Lisp_Object name
, ignore
;
740 register Lisp_Object gentemp
, tem
;
746 tem
= Fget_buffer (name
);
753 sprintf (number
, "<%d>", ++count
);
754 gentemp
= concat2 (name
, build_string (number
));
755 tem
= Fstring_equal (gentemp
, ignore
);
758 tem
= Fget_buffer (gentemp
);
765 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
766 doc
: /* Return the name of BUFFER, as a string.
767 With no argument or nil as argument, return the name of the current buffer. */)
769 register Lisp_Object buffer
;
772 return current_buffer
->name
;
773 CHECK_BUFFER (buffer
);
774 return XBUFFER (buffer
)->name
;
777 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
778 doc
: /* Return name of file BUFFER is visiting, or nil if none.
779 No argument or nil as argument means use the current buffer. */)
781 register Lisp_Object buffer
;
784 return current_buffer
->filename
;
785 CHECK_BUFFER (buffer
);
786 return XBUFFER (buffer
)->filename
;
789 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
791 doc
: /* Return the base buffer of indirect buffer BUFFER.
792 If BUFFER is not indirect, return nil. */)
794 register Lisp_Object buffer
;
797 Lisp_Object base_buffer
;
800 base
= current_buffer
->base_buffer
;
803 CHECK_BUFFER (buffer
);
804 base
= XBUFFER (buffer
)->base_buffer
;
809 XSETBUFFER (base_buffer
, base
);
813 DEFUN ("buffer-local-value", Fbuffer_local_value
,
814 Sbuffer_local_value
, 2, 2, 0,
815 doc
: /* Return the value of VARIABLE in BUFFER.
816 If VARIABLE does not have a buffer-local binding in BUFFER, the value
817 is the default binding of variable. */)
819 register Lisp_Object symbol
;
820 register Lisp_Object buffer
;
822 register struct buffer
*buf
;
823 register Lisp_Object result
;
825 CHECK_SYMBOL (symbol
);
826 CHECK_BUFFER (buffer
);
827 buf
= XBUFFER (buffer
);
829 /* Look in local_var_list */
830 result
= Fassoc (symbol
, buf
->local_var_alist
);
836 /* Look in special slots */
837 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
838 offset
< sizeof (struct buffer
);
839 /* sizeof EMACS_INT == sizeof Lisp_Object */
840 offset
+= (sizeof (EMACS_INT
)))
842 idx
= PER_BUFFER_IDX (offset
);
843 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
844 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
845 && EQ (PER_BUFFER_SYMBOL (offset
), symbol
))
847 result
= PER_BUFFER_VALUE (buf
, offset
);
854 result
= Fdefault_value (symbol
);
857 result
= XCDR (result
);
859 if (EQ (result
, Qunbound
))
860 return Fsignal (Qvoid_variable
, Fcons (symbol
, Qnil
));
865 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
866 Sbuffer_local_variables
, 0, 1, 0,
867 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
868 Most elements look like (SYMBOL . VALUE), describing one variable.
869 For a symbol that is locally unbound, just the symbol appears in the value.
870 Note that storing new VALUEs in these elements doesn't change the variables.
871 No argument or nil as argument means use current buffer as BUFFER. */)
873 register Lisp_Object buffer
;
875 register struct buffer
*buf
;
876 register Lisp_Object result
;
879 buf
= current_buffer
;
882 CHECK_BUFFER (buffer
);
883 buf
= XBUFFER (buffer
);
889 register Lisp_Object tail
;
890 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
892 Lisp_Object val
, elt
;
896 /* Reference each variable in the alist in buf.
897 If inquiring about the current buffer, this gets the current values,
898 so store them into the alist so the alist is up to date.
899 If inquiring about some other buffer, this swaps out any values
900 for that buffer, making the alist up to date automatically. */
901 val
= find_symbol_value (XCAR (elt
));
902 /* Use the current buffer value only if buf is the current buffer. */
903 if (buf
!= current_buffer
)
906 /* If symbol is unbound, put just the symbol in the list. */
907 if (EQ (val
, Qunbound
))
908 result
= Fcons (XCAR (elt
), result
);
909 /* Otherwise, put (symbol . value) in the list. */
911 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
915 /* Add on all the variables stored in special slots. */
919 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
920 offset
< sizeof (struct buffer
);
921 /* sizeof EMACS_INT == sizeof Lisp_Object */
922 offset
+= (sizeof (EMACS_INT
)))
924 idx
= PER_BUFFER_IDX (offset
);
925 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
926 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
927 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
928 PER_BUFFER_VALUE (buf
, offset
)),
937 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
939 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
940 No argument or nil as argument means use current buffer as BUFFER. */)
942 register Lisp_Object buffer
;
944 register struct buffer
*buf
;
946 buf
= current_buffer
;
949 CHECK_BUFFER (buffer
);
950 buf
= XBUFFER (buffer
);
953 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
956 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
958 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
959 A non-nil FLAG means mark the buffer modified. */)
961 register Lisp_Object flag
;
963 register int already
;
964 register Lisp_Object fn
;
965 Lisp_Object buffer
, window
;
967 #ifdef CLASH_DETECTION
968 /* If buffer becoming modified, lock the file.
969 If buffer becoming unmodified, unlock the file. */
971 fn
= current_buffer
->file_truename
;
972 /* Test buffer-file-name so that binding it to nil is effective. */
973 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
975 already
= SAVE_MODIFF
< MODIFF
;
976 if (!already
&& !NILP (flag
))
978 else if (already
&& NILP (flag
))
981 #endif /* CLASH_DETECTION */
983 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
985 /* Set update_mode_lines only if buffer is displayed in some window.
986 Packages like jit-lock or lazy-lock preserve a buffer's modified
987 state by recording/restoring the state around blocks of code.
988 Setting update_mode_lines makes redisplay consider all windows
989 (on all frames). Stealth fontification of buffers not displayed
990 would incur additional redisplay costs if we'd set
991 update_modes_lines unconditionally.
993 Ideally, I think there should be another mechanism for fontifying
994 buffers without "modifying" buffers, or redisplay should be
995 smarter about updating the `*' in mode lines. --gerd */
996 XSETBUFFER (buffer
, current_buffer
);
997 window
= Fget_buffer_window (buffer
, Qt
);
998 if (WINDOWP (window
))
1000 ++update_mode_lines
;
1001 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1007 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1008 Srestore_buffer_modified_p
, 1, 1, 0,
1009 doc
: /* Like `set-buffer-modified-p', with a differences concerning redisplay.
1010 It is not ensured that mode lines will be updated to show the modified
1011 state of the current buffer. Use with care. */)
1015 #ifdef CLASH_DETECTION
1018 /* If buffer becoming modified, lock the file.
1019 If buffer becoming unmodified, unlock the file. */
1021 fn
= current_buffer
->file_truename
;
1022 /* Test buffer-file-name so that binding it to nil is effective. */
1023 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1025 int already
= SAVE_MODIFF
< MODIFF
;
1026 if (!already
&& !NILP (flag
))
1028 else if (already
&& NILP (flag
))
1031 #endif /* CLASH_DETECTION */
1033 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1037 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1039 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1040 Each buffer has a tick counter which is incremented each time the text in
1041 that buffer is changed. It wraps around occasionally.
1042 No argument or nil as argument means use current buffer as BUFFER. */)
1044 register Lisp_Object buffer
;
1046 register struct buffer
*buf
;
1048 buf
= current_buffer
;
1051 CHECK_BUFFER (buffer
);
1052 buf
= XBUFFER (buffer
);
1055 return make_number (BUF_MODIFF (buf
));
1058 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1059 "sRename buffer (to new name): \nP",
1060 doc
: /* Change current buffer's name to NEWNAME (a string).
1061 If second arg UNIQUE is nil or omitted, it is an error if a
1062 buffer named NEWNAME already exists.
1063 If UNIQUE is non-nil, come up with a new name using
1064 `generate-new-buffer-name'.
1065 Interactively, you can set UNIQUE with a prefix argument.
1066 We return the name we actually gave the buffer.
1067 This does not change the name of the visited file (if any). */)
1069 register Lisp_Object newname
, unique
;
1071 register Lisp_Object tem
, buf
;
1073 CHECK_STRING (newname
);
1075 if (XSTRING (newname
)->size
== 0)
1076 error ("Empty string is invalid as a buffer name");
1078 tem
= Fget_buffer (newname
);
1081 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1082 rename the buffer automatically so you can create another
1083 with the original name. It makes UNIQUE equivalent to
1084 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1085 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1086 return current_buffer
->name
;
1088 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1090 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
1093 current_buffer
->name
= newname
;
1095 /* Catch redisplay's attention. Unless we do this, the mode lines for
1096 any windows displaying current_buffer will stay unchanged. */
1097 update_mode_lines
++;
1099 XSETBUFFER (buf
, current_buffer
);
1100 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1101 if (NILP (current_buffer
->filename
)
1102 && !NILP (current_buffer
->auto_save_file_name
))
1103 call0 (intern ("rename-auto-save-file"));
1104 /* Refetch since that last call may have done GC. */
1105 return current_buffer
->name
;
1108 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1109 doc
: /* Return most recently selected buffer other than BUFFER.
1110 Buffers not visible in windows are preferred to visible buffers,
1111 unless optional second argument VISIBLE-OK is non-nil.
1112 If the optional third argument FRAME is non-nil, use that frame's
1113 buffer list instead of the selected frame's buffer list.
1114 If no other buffer exists, the buffer `*scratch*' is returned.
1115 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1116 (buffer
, visible_ok
, frame
)
1117 register Lisp_Object buffer
, visible_ok
, frame
;
1119 Lisp_Object
Fset_buffer_major_mode ();
1120 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1124 frame
= selected_frame
;
1126 tail
= Vbuffer_alist
;
1127 pred
= frame_buffer_predicate (frame
);
1129 /* Consider buffers that have been seen in the selected frame
1130 before other buffers. */
1132 tem
= frame_buffer_list (frame
);
1136 if (BUFFERP (XCAR (tem
)))
1137 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1140 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1142 for (; !NILP (tail
); tail
= Fcdr (tail
))
1144 buf
= Fcdr (Fcar (tail
));
1145 if (EQ (buf
, buffer
))
1147 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
1149 /* If the selected frame has a buffer_predicate,
1150 disregard buffers that don't fit the predicate. */
1153 tem
= call1 (pred
, buf
);
1158 if (NILP (visible_ok
))
1159 tem
= Fget_buffer_window (buf
, Qvisible
);
1164 if (NILP (notsogood
))
1167 if (!NILP (notsogood
))
1169 buf
= Fget_buffer (build_string ("*scratch*"));
1172 buf
= Fget_buffer_create (build_string ("*scratch*"));
1173 Fset_buffer_major_mode (buf
);
1178 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
1180 doc
: /* Make BUFFER stop keeping undo information.
1181 No argument or nil as argument means do this for the current buffer. */)
1183 register Lisp_Object buffer
;
1185 Lisp_Object real_buffer
;
1188 XSETBUFFER (real_buffer
, current_buffer
);
1191 real_buffer
= Fget_buffer (buffer
);
1192 if (NILP (real_buffer
))
1196 XBUFFER (real_buffer
)->undo_list
= Qt
;
1201 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1203 doc
: /* Start keeping undo information for buffer BUFFER.
1204 No argument or nil as argument means do this for the current buffer. */)
1206 register Lisp_Object buffer
;
1208 Lisp_Object real_buffer
;
1211 XSETBUFFER (real_buffer
, current_buffer
);
1214 real_buffer
= Fget_buffer (buffer
);
1215 if (NILP (real_buffer
))
1219 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1220 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1226 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1227 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1228 The buffer being killed will be current while the hook is running.\n\
1231 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1232 doc
: /* Kill the buffer BUFFER.
1233 The argument may be a buffer or may be the name of a buffer.
1234 An argument of nil means kill the current buffer.
1236 Value is t if the buffer is actually killed, nil if user says no.
1238 The value of `kill-buffer-hook' (which may be local to that buffer),
1239 if not void, is a list of functions to be called, with no arguments,
1240 before the buffer is actually killed. The buffer to be killed is current
1241 when the hook functions are called.
1243 Any processes that have this buffer as the `process-buffer' are killed
1249 register struct buffer
*b
;
1250 register Lisp_Object tem
;
1251 register struct Lisp_Marker
*m
;
1252 struct gcpro gcpro1
;
1255 buf
= Fcurrent_buffer ();
1257 buf
= Fget_buffer (buffer
);
1263 /* Avoid trouble for buffer already dead. */
1267 /* Query if the buffer is still modified. */
1268 if (INTERACTIVE
&& !NILP (b
->filename
)
1269 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1272 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
1273 XSTRING (b
->name
)->data
));
1279 /* Run hooks with the buffer to be killed the current buffer. */
1281 int count
= specpdl_ptr
- specpdl
;
1284 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1285 set_buffer_internal (b
);
1287 /* First run the query functions; if any query is answered no,
1288 don't kill the buffer. */
1289 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
1291 tem
= call0 (Fcar (list
));
1293 return unbind_to (count
, Qnil
);
1296 /* Then run the hooks. */
1297 Frun_hooks (1, &Qkill_buffer_hook
);
1298 unbind_to (count
, Qnil
);
1301 /* We have no more questions to ask. Verify that it is valid
1302 to kill the buffer. This must be done after the questions
1303 since anything can happen within do_yes_or_no_p. */
1305 /* Don't kill the minibuffer now current. */
1306 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1312 /* When we kill a base buffer, kill all its indirect buffers.
1313 We do it at this stage so nothing terrible happens if they
1314 ask questions or their hooks get errors. */
1315 if (! b
->base_buffer
)
1317 struct buffer
*other
;
1321 for (other
= all_buffers
; other
; other
= other
->next
)
1322 /* all_buffers contains dead buffers too;
1323 don't re-kill them. */
1324 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1327 XSETBUFFER (buf
, other
);
1334 /* Make this buffer not be current.
1335 In the process, notice if this is the sole visible buffer
1336 and give up if so. */
1337 if (b
== current_buffer
)
1339 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1341 if (b
== current_buffer
)
1345 /* Notice if the buffer to kill is the sole visible buffer
1346 when we're currently in the mini-buffer, and give up if so. */
1347 XSETBUFFER (tem
, current_buffer
);
1348 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1350 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1355 /* Now there is no question: we can kill the buffer. */
1357 #ifdef CLASH_DETECTION
1358 /* Unlock this buffer's file, if it is locked. */
1360 #endif /* CLASH_DETECTION */
1362 kill_buffer_processes (buf
);
1364 tem
= Vinhibit_quit
;
1366 replace_buffer_in_all_windows (buf
);
1367 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1368 frames_discard_buffer (buf
);
1369 Vinhibit_quit
= tem
;
1371 /* Delete any auto-save file, if we saved it in this session.
1372 But not if the buffer is modified. */
1373 if (STRINGP (b
->auto_save_file_name
)
1374 && b
->auto_save_modified
!= 0
1375 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1376 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
))
1379 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1381 internal_delete_file (b
->auto_save_file_name
);
1386 /* Unchain all markers that belong to this indirect buffer.
1387 Don't unchain the markers that belong to the base buffer
1388 or its other indirect buffers. */
1389 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1395 unchain_marker (tem
);
1401 /* Unchain all markers of this buffer and its indirect buffers.
1402 and leave them pointing nowhere. */
1403 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1410 BUF_MARKERS (b
) = Qnil
;
1411 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1413 /* Perhaps we should explicitly free the interval tree here... */
1416 /* Reset the local variables, so that this buffer's local values
1417 won't be protected from GC. They would be protected
1418 if they happened to remain encached in their symbols.
1419 This gets rid of them for certain. */
1420 swap_out_buffer_local_variables (b
);
1421 reset_buffer_local_variables (b
, 1);
1426 if (! b
->base_buffer
)
1427 free_buffer_text (b
);
1429 if (b
->newline_cache
)
1431 free_region_cache (b
->newline_cache
);
1432 b
->newline_cache
= 0;
1434 if (b
->width_run_cache
)
1436 free_region_cache (b
->width_run_cache
);
1437 b
->width_run_cache
= 0;
1439 b
->width_table
= Qnil
;
1441 b
->undo_list
= Qnil
;
1446 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1447 we do this each time BUF is selected visibly, the more recently
1448 selected buffers are always closer to the front of the list. This
1449 means that other_buffer is more likely to choose a relevant buffer. */
1455 register Lisp_Object link
, prev
;
1457 frame
= selected_frame
;
1460 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1462 if (EQ (XCDR (XCAR (link
)), buf
))
1467 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1468 we cannot use Fdelq itself here because it allows quitting. */
1471 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1473 XSETCDR (prev
, XCDR (XCDR (prev
)));
1475 XSETCDR (link
, Vbuffer_alist
);
1476 Vbuffer_alist
= link
;
1478 /* Now move this buffer to the front of frame_buffer_list also. */
1481 for (link
= frame_buffer_list (frame
); CONSP (link
);
1484 if (EQ (XCAR (link
), buf
))
1489 /* Effectively do delq. */
1494 set_frame_buffer_list (frame
,
1495 XCDR (frame_buffer_list (frame
)));
1497 XSETCDR (prev
, XCDR (XCDR (prev
)));
1499 XSETCDR (link
, frame_buffer_list (frame
));
1500 set_frame_buffer_list (frame
, link
);
1503 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1506 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1507 doc
: /* Set an appropriate major mode for BUFFER.
1508 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1509 according to `default-major-mode'.
1510 Use this function before selecting the buffer, since it may need to inspect
1511 the current buffer's major mode. */)
1516 Lisp_Object function
;
1518 if (STRINGP (XBUFFER (buffer
)->name
)
1519 && strcmp (XSTRING (XBUFFER (buffer
)->name
)->data
, "*scratch*") == 0)
1520 function
= find_symbol_value (intern ("initial-major-mode"));
1523 function
= buffer_defaults
.major_mode
;
1525 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1526 function
= current_buffer
->major_mode
;
1529 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1532 count
= specpdl_ptr
- specpdl
;
1534 /* To select a nonfundamental mode,
1535 select the buffer temporarily and then call the mode function. */
1537 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1539 Fset_buffer (buffer
);
1542 return unbind_to (count
, Qnil
);
1545 /* If switching buffers in WINDOW would be an error, return
1546 a C string saying what the error would be. */
1549 no_switch_window (window
)
1553 if (EQ (minibuf_window
, window
))
1554 return "Cannot switch buffers in minibuffer window";
1555 tem
= Fwindow_dedicated_p (window
);
1557 return "Cannot switch buffers in a dedicated window";
1561 /* Switch to buffer BUFFER in the selected window.
1562 If NORECORD is non-nil, don't call record_buffer. */
1565 switch_to_buffer_1 (buffer
, norecord
)
1566 Lisp_Object buffer
, norecord
;
1568 register Lisp_Object buf
;
1571 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1574 buf
= Fget_buffer (buffer
);
1577 buf
= Fget_buffer_create (buffer
);
1578 Fset_buffer_major_mode (buf
);
1582 if (NILP (norecord
))
1583 record_buffer (buf
);
1585 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1586 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1593 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1594 doc
: /* Select buffer BUFFER in the current window.
1595 BUFFER may be a buffer or a buffer name.
1596 Optional second arg NORECORD non-nil means
1597 do not put this buffer at the front of the list of recently selected ones.
1599 WARNING: This is NOT the way to work on another buffer temporarily
1600 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1601 the window-buffer correspondences. */)
1603 Lisp_Object buffer
, norecord
;
1607 err
= no_switch_window (selected_window
);
1608 if (err
) error (err
);
1610 return switch_to_buffer_1 (buffer
, norecord
);
1613 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1614 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1615 If BUFFER is nil, then some other buffer is chosen.
1616 If `pop-up-windows' is non-nil, windows can be split to do this.
1617 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1618 window even if BUFFER is already visible in the selected window.
1619 This uses the function `display-buffer' as a subroutine; see the documentation
1620 of `display-buffer' for additional customization information.
1622 Optional third arg NORECORD non-nil means
1623 do not put this buffer at the front of the list of recently selected ones. */)
1624 (buffer
, other_window
, norecord
)
1625 Lisp_Object buffer
, other_window
, norecord
;
1627 register Lisp_Object buf
;
1629 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1632 buf
= Fget_buffer (buffer
);
1635 buf
= Fget_buffer_create (buffer
);
1636 Fset_buffer_major_mode (buf
);
1640 if (NILP (norecord
))
1641 /* This seems bogus since Fselect_window will call record_buffer anyway. */
1642 record_buffer (buf
);
1643 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1647 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1648 doc
: /* Return the current buffer as a Lisp object. */)
1651 register Lisp_Object buf
;
1652 XSETBUFFER (buf
, current_buffer
);
1656 /* Set the current buffer to B.
1658 We previously set windows_or_buffers_changed here to invalidate
1659 global unchanged information in beg_unchanged and end_unchanged.
1660 This is no longer necessary because we now compute unchanged
1661 information on a buffer-basis. Every action affecting other
1662 windows than the selected one requires a select_window at some
1663 time, and that increments windows_or_buffers_changed. */
1666 set_buffer_internal (b
)
1667 register struct buffer
*b
;
1669 if (current_buffer
!= b
)
1670 set_buffer_internal_1 (b
);
1673 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1674 This is used by redisplay. */
1677 set_buffer_internal_1 (b
)
1678 register struct buffer
*b
;
1680 register struct buffer
*old_buf
;
1681 register Lisp_Object tail
, valcontents
;
1684 #ifdef USE_MMAP_FOR_BUFFERS
1685 if (b
->text
->beg
== NULL
)
1686 enlarge_buffer_text (b
, 0);
1687 #endif /* USE_MMAP_FOR_BUFFERS */
1689 if (current_buffer
== b
)
1692 old_buf
= current_buffer
;
1694 last_known_column_point
= -1; /* invalidate indentation cache */
1698 /* Put the undo list back in the base buffer, so that it appears
1699 that an indirect buffer shares the undo list of its base. */
1700 if (old_buf
->base_buffer
)
1701 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1703 /* If the old current buffer has markers to record PT, BEGV and ZV
1704 when it is not current, update them now. */
1705 if (! NILP (old_buf
->pt_marker
))
1708 XSETBUFFER (obuf
, old_buf
);
1709 set_marker_both (old_buf
->pt_marker
, obuf
,
1710 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1712 if (! NILP (old_buf
->begv_marker
))
1715 XSETBUFFER (obuf
, old_buf
);
1716 set_marker_both (old_buf
->begv_marker
, obuf
,
1717 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1719 if (! NILP (old_buf
->zv_marker
))
1722 XSETBUFFER (obuf
, old_buf
);
1723 set_marker_both (old_buf
->zv_marker
, obuf
,
1724 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1728 /* Get the undo list from the base buffer, so that it appears
1729 that an indirect buffer shares the undo list of its base. */
1731 b
->undo_list
= b
->base_buffer
->undo_list
;
1733 /* If the new current buffer has markers to record PT, BEGV and ZV
1734 when it is not current, fetch them now. */
1735 if (! NILP (b
->pt_marker
))
1737 BUF_PT (b
) = marker_position (b
->pt_marker
);
1738 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1740 if (! NILP (b
->begv_marker
))
1742 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1743 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1745 if (! NILP (b
->zv_marker
))
1747 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1748 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1751 /* Look down buffer's list of local Lisp variables
1752 to find and update any that forward into C variables. */
1754 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1756 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1757 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1758 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1759 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1760 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1761 /* Just reference the variable
1762 to cause it to become set for this buffer. */
1763 Fsymbol_value (XCAR (XCAR (tail
)));
1766 /* Do the same with any others that were local to the previous buffer */
1769 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1771 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1772 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1773 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1774 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1775 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1776 /* Just reference the variable
1777 to cause it to become set for this buffer. */
1778 Fsymbol_value (XCAR (XCAR (tail
)));
1782 /* Switch to buffer B temporarily for redisplay purposes.
1783 This avoids certain things that don't need to be done within redisplay. */
1789 register struct buffer
*old_buf
;
1791 if (current_buffer
== b
)
1794 old_buf
= current_buffer
;
1799 /* If the old current buffer has markers to record PT, BEGV and ZV
1800 when it is not current, update them now. */
1801 if (! NILP (old_buf
->pt_marker
))
1804 XSETBUFFER (obuf
, old_buf
);
1805 set_marker_both (old_buf
->pt_marker
, obuf
,
1806 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1808 if (! NILP (old_buf
->begv_marker
))
1811 XSETBUFFER (obuf
, old_buf
);
1812 set_marker_both (old_buf
->begv_marker
, obuf
,
1813 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1815 if (! NILP (old_buf
->zv_marker
))
1818 XSETBUFFER (obuf
, old_buf
);
1819 set_marker_both (old_buf
->zv_marker
, obuf
,
1820 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1824 /* If the new current buffer has markers to record PT, BEGV and ZV
1825 when it is not current, fetch them now. */
1826 if (! NILP (b
->pt_marker
))
1828 BUF_PT (b
) = marker_position (b
->pt_marker
);
1829 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1831 if (! NILP (b
->begv_marker
))
1833 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1834 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1836 if (! NILP (b
->zv_marker
))
1838 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1839 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1843 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1844 doc
: /* Make the buffer BUFFER current for editing operations.
1845 BUFFER may be a buffer or the name of an existing buffer.
1846 See also `save-excursion' when you want to make a buffer current temporarily.
1847 This function does not display the buffer, so its effect ends
1848 when the current command terminates.
1849 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1851 register Lisp_Object buffer
;
1853 register Lisp_Object buf
;
1854 buf
= Fget_buffer (buffer
);
1857 if (NILP (XBUFFER (buf
)->name
))
1858 error ("Selecting deleted buffer");
1859 set_buffer_internal (XBUFFER (buf
));
1863 /* Set the current buffer to BUFFER provided it is alive. */
1866 set_buffer_if_live (buffer
)
1869 if (! NILP (XBUFFER (buffer
)->name
))
1870 Fset_buffer (buffer
);
1874 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1875 Sbarf_if_buffer_read_only
, 0, 0, 0,
1876 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1879 if (!NILP (current_buffer
->read_only
)
1880 && NILP (Vinhibit_read_only
))
1881 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1885 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1886 doc
: /* Put BUFFER at the end of the list of all buffers.
1887 There it is the least likely candidate for `other-buffer' to return;
1888 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1889 If BUFFER is nil or omitted, bury the current buffer.
1890 Also, if BUFFER is nil or omitted, remove the current buffer from the
1891 selected window if it is displayed there. */)
1893 register Lisp_Object buffer
;
1895 /* Figure out what buffer we're going to bury. */
1899 XSETBUFFER (buffer
, current_buffer
);
1901 tem
= Fwindow_buffer (selected_window
);
1902 /* If we're burying the current buffer, unshow it. */
1903 if (EQ (buffer
, tem
))
1905 if (NILP (Fwindow_dedicated_p (selected_window
)))
1906 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1907 else if (NILP (XWINDOW (selected_window
)->parent
))
1908 Ficonify_frame (Fwindow_frame (selected_window
));
1910 Fdelete_window (selected_window
);
1917 buf1
= Fget_buffer (buffer
);
1923 /* Move buffer to the end of the buffer list. Do nothing if the
1924 buffer is killed. */
1925 if (!NILP (XBUFFER (buffer
)->name
))
1927 Lisp_Object aelt
, link
;
1929 aelt
= Frassq (buffer
, Vbuffer_alist
);
1930 link
= Fmemq (aelt
, Vbuffer_alist
);
1931 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1932 XSETCDR (link
, Qnil
);
1933 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1935 /* Removing BUFFER from frame-specific lists
1936 has the effect of putting BUFFER at the end
1937 of the combined list in each frame. */
1938 frames_discard_buffer (buffer
);
1944 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1945 doc
: /* Delete the entire contents of the current buffer.
1946 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1947 so the buffer is truly empty after this. */)
1954 current_buffer
->last_window_start
= 1;
1955 /* Prevent warnings, or suspension of auto saving, that would happen
1956 if future size is less than past size. Use of erase-buffer
1957 implies that the future text is not really related to the past text. */
1958 XSETFASTINT (current_buffer
->save_length
, 0);
1963 validate_region (b
, e
)
1964 register Lisp_Object
*b
, *e
;
1966 CHECK_NUMBER_COERCE_MARKER (*b
);
1967 CHECK_NUMBER_COERCE_MARKER (*e
);
1969 if (XINT (*b
) > XINT (*e
))
1972 tem
= *b
; *b
= *e
; *e
= tem
;
1975 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1976 && XINT (*e
) <= ZV
))
1977 args_out_of_range (*b
, *e
);
1980 /* Advance BYTE_POS up to a character boundary
1981 and return the adjusted position. */
1984 advance_to_char_boundary (byte_pos
)
1989 if (byte_pos
== BEG
)
1990 /* Beginning of buffer is always a character boundary. */
1993 c
= FETCH_BYTE (byte_pos
);
1994 if (! CHAR_HEAD_P (c
))
1996 /* We should advance BYTE_POS only when C is a constituent of a
1997 multibyte sequence. */
1998 int orig_byte_pos
= byte_pos
;
2003 c
= FETCH_BYTE (byte_pos
);
2005 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2007 if (byte_pos
< orig_byte_pos
)
2008 byte_pos
= orig_byte_pos
;
2009 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2010 surely advance to the correct character boundary. If C is
2011 not, BYTE_POS was unchanged. */
2017 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2019 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2020 If FLAG is t, this makes the buffer a multibyte buffer.
2021 If FLAG is nil, this makes the buffer a single-byte buffer.
2022 The buffer contents remain unchanged as a sequence of bytes
2023 but the contents viewed as characters do change. */)
2027 Lisp_Object tail
, markers
;
2028 struct buffer
*other
;
2029 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2030 int begv
= BEGV
, zv
= ZV
;
2031 int narrowed
= (BEG
!= begv
|| Z
!= zv
);
2032 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2034 if (current_buffer
->base_buffer
)
2035 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2037 /* Do nothing if nothing actually changes. */
2038 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2041 /* It would be better to update the list,
2042 but this is good enough for now. */
2044 current_buffer
->undo_list
= Qt
;
2046 /* If the cached position is for this buffer, clear it out. */
2047 clear_charpos_cache (current_buffer
);
2057 /* Do this first, so it can use CHAR_TO_BYTE
2058 to calculate the old correspondences. */
2059 set_intervals_multibyte (0);
2061 current_buffer
->enable_multibyte_characters
= Qnil
;
2067 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2069 tail
= BUF_MARKERS (current_buffer
);
2070 while (! NILP (tail
))
2072 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
2073 tail
= XMARKER (tail
)->chain
;
2076 /* Convert multibyte form of 8-bit characters to unibyte. */
2091 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2092 p
+= bytes
, pos
+= bytes
;
2095 c
= STRING_CHAR (p
, stop
- pos
);
2096 /* Delete all bytes for this 8-bit character but the
2097 last one, and change the last one to the charcter
2100 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2112 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2120 /* Be sure not to have a multibyte sequence striding over the GAP.
2121 Ex: We change this: "...abc\201 _GAP_ \241def..."
2122 to: "...abc _GAP_ \201\241def..." */
2124 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2125 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2127 unsigned char *p
= GPT_ADDR
- 1;
2129 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2130 if (BASE_LEADING_CODE_P (*p
))
2132 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2134 move_gap_both (new_gpt
, new_gpt
);
2138 /* Make the buffer contents valid as multibyte by converting
2139 8-bit characters to multibyte form. */
2155 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2156 p
+= bytes
, pos
+= bytes
;
2159 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2161 bytes
= CHAR_STRING (*p
, tmp
);
2163 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2165 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2166 /* Now the gap is after the just inserted data. */
2183 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2185 /* Do this first, so that chars_in_text asks the right question.
2186 set_intervals_multibyte needs it too. */
2187 current_buffer
->enable_multibyte_characters
= Qt
;
2189 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2190 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2192 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2194 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2195 if (BEGV_BYTE
> GPT_BYTE
)
2196 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2198 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2200 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2201 if (ZV_BYTE
> GPT_BYTE
)
2202 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2204 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2207 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2210 if (pt_byte
> GPT_BYTE
)
2211 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2213 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2214 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2217 tail
= markers
= BUF_MARKERS (current_buffer
);
2219 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2220 getting confused by the markers that have not yet been updated.
2221 It is also a signal that it should never create a marker. */
2222 BUF_MARKERS (current_buffer
) = Qnil
;
2224 while (! NILP (tail
))
2226 XMARKER (tail
)->bytepos
2227 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
2228 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
2230 tail
= XMARKER (tail
)->chain
;
2233 /* Make sure no markers were put on the chain
2234 while the chain value was incorrect. */
2235 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
2238 BUF_MARKERS (current_buffer
) = markers
;
2240 /* Do this last, so it can calculate the new correspondences
2241 between chars and bytes. */
2242 set_intervals_multibyte (1);
2246 current_buffer
->undo_list
= Qnil
;
2248 /* Changing the multibyteness of a buffer means that all windows
2249 showing that buffer must be updated thoroughly. */
2250 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2251 ++windows_or_buffers_changed
;
2253 /* Copy this buffer's new multibyte status
2254 into all of its indirect buffers. */
2255 for (other
= all_buffers
; other
; other
= other
->next
)
2256 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2258 other
->enable_multibyte_characters
2259 = current_buffer
->enable_multibyte_characters
;
2260 other
->prevent_redisplay_optimizations_p
= 1;
2263 /* Restore the modifiedness of the buffer. */
2264 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2265 Fset_buffer_modified_p (Qnil
);
2270 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2272 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2273 Most local variable bindings are eliminated so that the default values
2274 become effective once more. Also, the syntax table is set from
2275 `standard-syntax-table', the local keymap is set to nil,
2276 and the abbrev table from `fundamental-mode-abbrev-table'.
2277 This function also forces redisplay of the mode line.
2279 Every function to select a new major mode starts by
2280 calling this function.
2282 As a special exception, local variables whose names have
2283 a non-nil `permanent-local' property are not eliminated by this function.
2285 The first thing this function does is run
2286 the normal hook `change-major-mode-hook'. */)
2289 register Lisp_Object alist
, sym
, tem
;
2292 if (!NILP (Vrun_hooks
))
2293 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2294 oalist
= current_buffer
->local_var_alist
;
2296 /* Make sure none of the bindings in oalist
2297 remain swapped in, in their symbols. */
2299 swap_out_buffer_local_variables (current_buffer
);
2301 /* Actually eliminate all local bindings of this buffer. */
2303 reset_buffer_local_variables (current_buffer
, 0);
2305 /* Any which are supposed to be permanent,
2306 make local again, with the same values they had. */
2308 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2310 sym
= XCAR (XCAR (alist
));
2311 tem
= Fget (sym
, Qpermanent_local
);
2314 Fmake_local_variable (sym
);
2315 Fset (sym
, XCDR (XCAR (alist
)));
2319 /* Force mode-line redisplay. Useful here because all major mode
2320 commands call this function. */
2321 update_mode_lines
++;
2326 /* Make sure no local variables remain set up with buffer B
2327 for their current values. */
2330 swap_out_buffer_local_variables (b
)
2333 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2335 XSETBUFFER (buffer
, b
);
2336 oalist
= b
->local_var_alist
;
2338 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2340 sym
= XCAR (XCAR (alist
));
2342 /* Need not do anything if some other buffer's binding is now encached. */
2343 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2344 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2346 /* Symbol is set up for this buffer's old local value.
2347 Set it up for the current buffer with the default value. */
2349 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2350 /* Store the symbol's current value into the alist entry
2351 it is currently set up for. This is so that, if the
2352 local is marked permanent, and we make it local again
2353 later in Fkill_all_local_variables, we don't lose the value. */
2354 XSETCDR (XCAR (tem
),
2355 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2356 /* Switch to the symbol's default-value alist entry. */
2358 /* Mark it as current for buffer B. */
2359 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2360 /* Store the current value into any forwarding in the symbol. */
2361 store_symval_forwarding (sym
,
2362 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2368 /* Find all the overlays in the current buffer that contain position POS.
2369 Return the number found, and store them in a vector in *VEC_PTR.
2370 Store in *LEN_PTR the size allocated for the vector.
2371 Store in *NEXT_PTR the next position after POS where an overlay starts,
2372 or ZV if there are no more overlays.
2373 Store in *PREV_PTR the previous position before POS where an overlay ends,
2374 or where an overlay starts which ends at or after POS;
2375 or BEGV if there are no such overlays.
2376 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2378 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2379 when this function is called.
2381 If EXTEND is non-zero, we make the vector bigger if necessary.
2382 If EXTEND is zero, we never extend the vector,
2383 and we store only as many overlays as will fit.
2384 But we still return the total number of overlays.
2386 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2387 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2388 default (BEGV or ZV). */
2391 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2394 Lisp_Object
**vec_ptr
;
2400 Lisp_Object tail
, overlay
, start
, end
;
2403 Lisp_Object
*vec
= *vec_ptr
;
2406 int inhibit_storing
= 0;
2408 for (tail
= current_buffer
->overlays_before
;
2412 int startpos
, endpos
;
2414 overlay
= XCAR (tail
);
2416 start
= OVERLAY_START (overlay
);
2417 end
= OVERLAY_END (overlay
);
2418 endpos
= OVERLAY_POSITION (end
);
2425 startpos
= OVERLAY_POSITION (start
);
2426 /* This one ends at or after POS
2427 so its start counts for PREV_PTR if it's before POS. */
2428 if (prev
< startpos
&& startpos
< pos
)
2432 if (startpos
<= pos
)
2436 /* The supplied vector is full.
2437 Either make it bigger, or don't store any more in it. */
2440 /* Make it work with an initial len == 0. */
2445 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2449 inhibit_storing
= 1;
2452 if (!inhibit_storing
)
2454 /* Keep counting overlays even if we can't return them all. */
2457 else if (startpos
< next
)
2461 for (tail
= current_buffer
->overlays_after
;
2465 int startpos
, endpos
;
2467 overlay
= XCAR (tail
);
2469 start
= OVERLAY_START (overlay
);
2470 end
= OVERLAY_END (overlay
);
2471 startpos
= OVERLAY_POSITION (start
);
2474 if (startpos
< next
)
2478 endpos
= OVERLAY_POSITION (end
);
2485 *len_ptr
= len
*= 2;
2488 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2492 inhibit_storing
= 1;
2495 if (!inhibit_storing
)
2499 if (startpos
< pos
&& startpos
> prev
)
2502 else if (endpos
< pos
&& endpos
> prev
)
2504 else if (endpos
== pos
&& startpos
> prev
2505 && (!change_req
|| startpos
< pos
))
2516 /* Find all the overlays in the current buffer that overlap the range BEG-END
2517 or are empty at BEG.
2519 Return the number found, and store them in a vector in *VEC_PTR.
2520 Store in *LEN_PTR the size allocated for the vector.
2521 Store in *NEXT_PTR the next position after POS where an overlay starts,
2522 or ZV if there are no more overlays.
2523 Store in *PREV_PTR the previous position before POS where an overlay ends,
2524 or BEGV if there are no previous overlays.
2525 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2527 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2528 when this function is called.
2530 If EXTEND is non-zero, we make the vector bigger if necessary.
2531 If EXTEND is zero, we never extend the vector,
2532 and we store only as many overlays as will fit.
2533 But we still return the total number of overlays. */
2536 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2539 Lisp_Object
**vec_ptr
;
2544 Lisp_Object tail
, overlay
, ostart
, oend
;
2547 Lisp_Object
*vec
= *vec_ptr
;
2550 int inhibit_storing
= 0;
2552 for (tail
= current_buffer
->overlays_before
;
2556 int startpos
, endpos
;
2558 overlay
= XCAR (tail
);
2560 ostart
= OVERLAY_START (overlay
);
2561 oend
= OVERLAY_END (overlay
);
2562 endpos
= OVERLAY_POSITION (oend
);
2569 startpos
= OVERLAY_POSITION (ostart
);
2570 /* Count an interval if it either overlaps the range
2571 or is empty at the start of the range. */
2572 if ((beg
< endpos
&& startpos
< end
)
2573 || (startpos
== endpos
&& beg
== endpos
))
2577 /* The supplied vector is full.
2578 Either make it bigger, or don't store any more in it. */
2581 *len_ptr
= len
*= 2;
2582 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2586 inhibit_storing
= 1;
2589 if (!inhibit_storing
)
2591 /* Keep counting overlays even if we can't return them all. */
2594 else if (startpos
< next
)
2598 for (tail
= current_buffer
->overlays_after
;
2602 int startpos
, endpos
;
2604 overlay
= XCAR (tail
);
2606 ostart
= OVERLAY_START (overlay
);
2607 oend
= OVERLAY_END (overlay
);
2608 startpos
= OVERLAY_POSITION (ostart
);
2611 if (startpos
< next
)
2615 endpos
= OVERLAY_POSITION (oend
);
2616 /* Count an interval if it either overlaps the range
2617 or is empty at the start of the range. */
2618 if ((beg
< endpos
&& startpos
< end
)
2619 || (startpos
== endpos
&& beg
== endpos
))
2625 *len_ptr
= len
*= 2;
2626 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2630 inhibit_storing
= 1;
2633 if (!inhibit_storing
)
2637 else if (endpos
< beg
&& endpos
> prev
)
2649 /* Return non-zero if there exists an overlay with a non-nil
2650 `mouse-face' property overlapping OVERLAY. */
2653 mouse_face_overlay_overlaps (overlay
)
2654 Lisp_Object overlay
;
2656 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2657 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2659 Lisp_Object
*v
, tem
;
2662 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2663 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2666 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2667 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2670 for (i
= 0; i
< n
; ++i
)
2671 if (!EQ (v
[i
], overlay
)
2672 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2681 /* Fast function to just test if we're at an overlay boundary. */
2683 overlay_touches_p (pos
)
2686 Lisp_Object tail
, overlay
;
2688 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2693 overlay
= XCAR (tail
);
2694 if (!GC_OVERLAYP (overlay
))
2697 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2700 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2704 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2709 overlay
= XCAR (tail
);
2710 if (!GC_OVERLAYP (overlay
))
2713 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2716 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2724 Lisp_Object overlay
;
2730 compare_overlays (v1
, v2
)
2731 const void *v1
, *v2
;
2733 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2734 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2735 if (s1
->priority
!= s2
->priority
)
2736 return s1
->priority
- s2
->priority
;
2737 if (s1
->beg
!= s2
->beg
)
2738 return s1
->beg
- s2
->beg
;
2739 if (s1
->end
!= s2
->end
)
2740 return s2
->end
- s1
->end
;
2744 /* Sort an array of overlays by priority. The array is modified in place.
2745 The return value is the new size; this may be smaller than the original
2746 size if some of the overlays were invalid or were window-specific. */
2748 sort_overlays (overlay_vec
, noverlays
, w
)
2749 Lisp_Object
*overlay_vec
;
2754 struct sortvec
*sortvec
;
2755 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2757 /* Put the valid and relevant overlays into sortvec. */
2759 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2762 Lisp_Object overlay
;
2764 overlay
= overlay_vec
[i
];
2765 if (OVERLAY_VALID (overlay
)
2766 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2767 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2769 /* If we're interested in a specific window, then ignore
2770 overlays that are limited to some other window. */
2775 window
= Foverlay_get (overlay
, Qwindow
);
2776 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2780 /* This overlay is good and counts: put it into sortvec. */
2781 sortvec
[j
].overlay
= overlay
;
2782 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2783 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2784 tem
= Foverlay_get (overlay
, Qpriority
);
2786 sortvec
[j
].priority
= XINT (tem
);
2788 sortvec
[j
].priority
= 0;
2794 /* Sort the overlays into the proper order: increasing priority. */
2797 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2799 for (i
= 0; i
< noverlays
; i
++)
2800 overlay_vec
[i
] = sortvec
[i
].overlay
;
2806 Lisp_Object string
, string2
;
2813 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2814 int size
; /* Allocated length of that array. */
2815 int used
; /* How much of the array is currently in use. */
2816 int bytes
; /* Total length of the strings in buf. */
2819 /* Buffers for storing information about the overlays touching a given
2820 position. These could be automatic variables in overlay_strings, but
2821 it's more efficient to hold onto the memory instead of repeatedly
2822 allocating and freeing it. */
2823 static struct sortstrlist overlay_heads
, overlay_tails
;
2824 static unsigned char *overlay_str_buf
;
2826 /* Allocated length of overlay_str_buf. */
2827 static int overlay_str_len
;
2829 /* A comparison function suitable for passing to qsort. */
2831 cmp_for_strings (as1
, as2
)
2834 struct sortstr
*s1
= (struct sortstr
*)as1
;
2835 struct sortstr
*s2
= (struct sortstr
*)as2
;
2836 if (s1
->size
!= s2
->size
)
2837 return s2
->size
- s1
->size
;
2838 if (s1
->priority
!= s2
->priority
)
2839 return s1
->priority
- s2
->priority
;
2844 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2845 struct sortstrlist
*ssl
;
2846 Lisp_Object str
, str2
, pri
;
2851 if (ssl
->used
== ssl
->size
)
2857 ssl
->buf
= ((struct sortstr
*)
2858 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2860 ssl
->buf
[ssl
->used
].string
= str
;
2861 ssl
->buf
[ssl
->used
].string2
= str2
;
2862 ssl
->buf
[ssl
->used
].size
= size
;
2863 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2866 if (NILP (current_buffer
->enable_multibyte_characters
))
2867 nbytes
= XSTRING (str
)->size
;
2868 else if (! STRING_MULTIBYTE (str
))
2869 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2870 STRING_BYTES (XSTRING (str
)));
2872 nbytes
= STRING_BYTES (XSTRING (str
));
2874 ssl
->bytes
+= nbytes
;
2878 if (NILP (current_buffer
->enable_multibyte_characters
))
2879 nbytes
= XSTRING (str2
)->size
;
2880 else if (! STRING_MULTIBYTE (str2
))
2881 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2882 STRING_BYTES (XSTRING (str2
)));
2884 nbytes
= STRING_BYTES (XSTRING (str2
));
2886 ssl
->bytes
+= nbytes
;
2890 /* Return the concatenation of the strings associated with overlays that
2891 begin or end at POS, ignoring overlays that are specific to a window
2892 other than W. The strings are concatenated in the appropriate order:
2893 shorter overlays nest inside longer ones, and higher priority inside
2894 lower. Normally all of the after-strings come first, but zero-sized
2895 overlays have their after-strings ride along with the before-strings
2896 because it would look strange to print them inside-out.
2898 Returns the string length, and stores the contents indirectly through
2899 PSTR, if that variable is non-null. The string may be overwritten by
2900 subsequent calls. */
2903 overlay_strings (pos
, w
, pstr
)
2906 unsigned char **pstr
;
2908 Lisp_Object ov
, overlay
, window
, str
;
2909 int startpos
, endpos
;
2910 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2912 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2913 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2914 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCDR (ov
))
2916 overlay
= XCAR (ov
);
2917 if (!OVERLAYP (overlay
))
2920 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2921 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2924 if (endpos
!= pos
&& startpos
!= pos
)
2926 window
= Foverlay_get (overlay
, Qwindow
);
2927 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2930 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2931 record_overlay_string (&overlay_heads
, str
,
2933 ? Foverlay_get (overlay
, Qafter_string
)
2935 Foverlay_get (overlay
, Qpriority
),
2937 else if (endpos
== pos
2938 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2939 record_overlay_string (&overlay_tails
, str
, Qnil
,
2940 Foverlay_get (overlay
, Qpriority
),
2943 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCDR (ov
))
2945 overlay
= XCAR (ov
);
2946 if (!OVERLAYP (overlay
))
2949 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2950 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2953 if (endpos
!= pos
&& startpos
!= pos
)
2955 window
= Foverlay_get (overlay
, Qwindow
);
2956 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2959 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2960 record_overlay_string (&overlay_heads
, str
,
2962 ? Foverlay_get (overlay
, Qafter_string
)
2964 Foverlay_get (overlay
, Qpriority
),
2966 else if (endpos
== pos
2967 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2968 record_overlay_string (&overlay_tails
, str
, Qnil
,
2969 Foverlay_get (overlay
, Qpriority
),
2972 if (overlay_tails
.used
> 1)
2973 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2975 if (overlay_heads
.used
> 1)
2976 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2978 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2983 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2985 if (total
> overlay_str_len
)
2987 overlay_str_len
= total
;
2988 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2991 p
= overlay_str_buf
;
2992 for (i
= overlay_tails
.used
; --i
>= 0;)
2995 tem
= overlay_tails
.buf
[i
].string
;
2996 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2997 STRING_BYTES (XSTRING (tem
)),
2998 STRING_MULTIBYTE (tem
), multibyte
);
3001 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3004 tem
= overlay_heads
.buf
[i
].string
;
3005 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
3006 STRING_BYTES (XSTRING (tem
)),
3007 STRING_MULTIBYTE (tem
), multibyte
);
3009 tem
= overlay_heads
.buf
[i
].string2
;
3012 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
3013 STRING_BYTES (XSTRING (tem
)),
3014 STRING_MULTIBYTE (tem
), multibyte
);
3018 if (p
!= overlay_str_buf
+ total
)
3021 *pstr
= overlay_str_buf
;
3027 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3030 recenter_overlay_lists (buf
, pos
)
3034 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
3036 /* See if anything in overlays_before should move to overlays_after. */
3038 /* We don't strictly need prev in this loop; it should always be nil.
3039 But we use it for symmetry and in case that should cease to be true
3040 with some future change. */
3042 for (tail
= buf
->overlays_before
;
3044 prev
= tail
, tail
= next
)
3047 overlay
= XCAR (tail
);
3049 /* If the overlay is not valid, get rid of it. */
3050 if (!OVERLAY_VALID (overlay
))
3055 /* Splice the cons cell TAIL out of overlays_before. */
3059 buf
->overlays_before
= next
;
3065 beg
= OVERLAY_START (overlay
);
3066 end
= OVERLAY_END (overlay
);
3068 if (OVERLAY_POSITION (end
) > pos
)
3070 /* OVERLAY needs to be moved. */
3071 int where
= OVERLAY_POSITION (beg
);
3072 Lisp_Object other
, other_prev
;
3074 /* Splice the cons cell TAIL out of overlays_before. */
3076 XSETCDR (prev
, next
);
3078 buf
->overlays_before
= next
;
3080 /* Search thru overlays_after for where to put it. */
3082 for (other
= buf
->overlays_after
;
3084 other_prev
= other
, other
= XCDR (other
))
3086 Lisp_Object otherbeg
, otheroverlay
;
3088 otheroverlay
= XCAR (other
);
3089 if (! OVERLAY_VALID (otheroverlay
))
3092 otherbeg
= OVERLAY_START (otheroverlay
);
3093 if (OVERLAY_POSITION (otherbeg
) >= where
)
3097 /* Add TAIL to overlays_after before OTHER. */
3098 XSETCDR (tail
, other
);
3099 if (!NILP (other_prev
))
3100 XSETCDR (other_prev
, tail
);
3102 buf
->overlays_after
= tail
;
3106 /* We've reached the things that should stay in overlays_before.
3107 All the rest of overlays_before must end even earlier,
3112 /* See if anything in overlays_after should be in overlays_before. */
3114 for (tail
= buf
->overlays_after
;
3116 prev
= tail
, tail
= next
)
3119 overlay
= XCAR (tail
);
3121 /* If the overlay is not valid, get rid of it. */
3122 if (!OVERLAY_VALID (overlay
))
3127 /* Splice the cons cell TAIL out of overlays_after. */
3131 buf
->overlays_after
= next
;
3137 beg
= OVERLAY_START (overlay
);
3138 end
= OVERLAY_END (overlay
);
3140 /* Stop looking, when we know that nothing further
3141 can possibly end before POS. */
3142 if (OVERLAY_POSITION (beg
) > pos
)
3145 if (OVERLAY_POSITION (end
) <= pos
)
3147 /* OVERLAY needs to be moved. */
3148 int where
= OVERLAY_POSITION (end
);
3149 Lisp_Object other
, other_prev
;
3151 /* Splice the cons cell TAIL out of overlays_after. */
3153 XSETCDR (prev
, next
);
3155 buf
->overlays_after
= next
;
3157 /* Search thru overlays_before for where to put it. */
3159 for (other
= buf
->overlays_before
;
3161 other_prev
= other
, other
= XCDR (other
))
3163 Lisp_Object otherend
, otheroverlay
;
3165 otheroverlay
= XCAR (other
);
3166 if (! OVERLAY_VALID (otheroverlay
))
3169 otherend
= OVERLAY_END (otheroverlay
);
3170 if (OVERLAY_POSITION (otherend
) <= where
)
3174 /* Add TAIL to overlays_before before OTHER. */
3175 XSETCDR (tail
, other
);
3176 if (!NILP (other_prev
))
3177 XSETCDR (other_prev
, tail
);
3179 buf
->overlays_before
= tail
;
3184 XSETFASTINT (buf
->overlay_center
, pos
);
3188 adjust_overlays_for_insert (pos
, length
)
3192 /* After an insertion, the lists are still sorted properly,
3193 but we may need to update the value of the overlay center. */
3194 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
3195 XSETFASTINT (current_buffer
->overlay_center
,
3196 XFASTINT (current_buffer
->overlay_center
) + length
);
3200 adjust_overlays_for_delete (pos
, length
)
3204 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
3205 /* The deletion was to our right. No change needed; the before- and
3206 after-lists are still consistent. */
3208 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
3209 /* The deletion was to our left. We need to adjust the center value
3210 to account for the change in position, but the lists are consistent
3211 given the new value. */
3212 XSETFASTINT (current_buffer
->overlay_center
,
3213 XFASTINT (current_buffer
->overlay_center
) - length
);
3215 /* We're right in the middle. There might be things on the after-list
3216 that now belong on the before-list. Recentering will move them,
3217 and also update the center point. */
3218 recenter_overlay_lists (current_buffer
, pos
);
3221 /* Fix up overlays that were garbled as a result of permuting markers
3222 in the range START through END. Any overlay with at least one
3223 endpoint in this range will need to be unlinked from the overlay
3224 list and reinserted in its proper place.
3225 Such an overlay might even have negative size at this point.
3226 If so, we'll reverse the endpoints. Can you think of anything
3227 better to do in this situation? */
3229 fix_overlays_in_range (start
, end
)
3230 register int start
, end
;
3232 Lisp_Object overlay
;
3233 Lisp_Object before_list
, after_list
;
3234 /* These are either nil, indicating that before_list or after_list
3235 should be assigned, or the cons cell the cdr of which should be
3237 Lisp_Object beforep
= Qnil
, afterp
= Qnil
;
3238 /* 'Parent', likewise, indicates a cons cell or
3239 current_buffer->overlays_before or overlays_after, depending
3240 which loop we're in. */
3241 Lisp_Object tail
, parent
;
3242 int startpos
, endpos
;
3244 /* This algorithm shifts links around instead of consing and GCing.
3245 The loop invariant is that before_list (resp. after_list) is a
3246 well-formed list except that its last element, the CDR of beforep
3247 (resp. afterp) if beforep (afterp) isn't nil or before_list
3248 (after_list) if it is, is still uninitialized. So it's not a bug
3249 that before_list isn't initialized, although it may look
3251 for (parent
= Qnil
, tail
= current_buffer
->overlays_before
; CONSP (tail
);)
3253 overlay
= XCAR (tail
);
3254 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3257 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3259 || (startpos
>= start
&& startpos
< end
))
3261 /* If the overlay is backwards, fix that now. */
3262 if (startpos
> endpos
)
3265 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3267 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3269 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3271 /* Add it to the end of the wrong list. Later on,
3272 recenter_overlay_lists will move it to the right place. */
3273 if (endpos
< XINT (current_buffer
->overlay_center
))
3278 XSETCDR (afterp
, tail
);
3286 XSETCDR (beforep
, tail
);
3290 current_buffer
->overlays_before
= XCDR (tail
);
3292 XSETCDR (parent
, XCDR (tail
));
3296 parent
= tail
, tail
= XCDR (parent
);
3298 for (parent
= Qnil
, tail
= current_buffer
->overlays_after
; CONSP (tail
);)
3300 overlay
= XCAR (tail
);
3301 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3302 if (startpos
>= end
)
3304 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3305 if (startpos
>= start
3306 || (endpos
>= start
&& endpos
< end
))
3308 if (startpos
> endpos
)
3311 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3313 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3315 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3317 if (endpos
< XINT (current_buffer
->overlay_center
))
3322 XSETCDR (afterp
, tail
);
3330 XSETCDR (beforep
, tail
);
3334 current_buffer
->overlays_after
= XCDR (tail
);
3336 XSETCDR (parent
, XCDR (tail
));
3340 parent
= tail
, tail
= XCDR (parent
);
3343 /* Splice the constructed (wrong) lists into the buffer's lists,
3344 and let the recenter function make it sane again. */
3345 if (!NILP (beforep
))
3347 XSETCDR (beforep
, current_buffer
->overlays_before
);
3348 current_buffer
->overlays_before
= before_list
;
3350 recenter_overlay_lists (current_buffer
,
3351 XINT (current_buffer
->overlay_center
));
3355 XSETCDR (afterp
, current_buffer
->overlays_after
);
3356 current_buffer
->overlays_after
= after_list
;
3358 recenter_overlay_lists (current_buffer
,
3359 XINT (current_buffer
->overlay_center
));
3362 /* We have two types of overlay: the one whose ending marker is
3363 after-insertion-marker (this is the usual case) and the one whose
3364 ending marker is before-insertion-marker. When `overlays_before'
3365 contains overlays of the latter type and the former type in this
3366 order and both overlays end at inserting position, inserting a text
3367 increases only the ending marker of the latter type, which results
3368 in incorrect ordering of `overlays_before'.
3370 This function fixes ordering of overlays in the slot
3371 `overlays_before' of the buffer *BP. Before the insertion, `point'
3372 was at PREV, and now is at POS. */
3375 fix_overlays_before (bp
, prev
, pos
)
3379 /* If parent is nil, replace overlays_before; otherwise, XCDR(parent). */
3380 Lisp_Object tail
= bp
->overlays_before
, parent
= Qnil
;
3381 Lisp_Object right_pair
;
3384 /* After the insertion, the several overlays may be in incorrect
3385 order. The possibility is that, in the list `overlays_before',
3386 an overlay which ends at POS appears after an overlay which ends
3387 at PREV. Since POS is greater than PREV, we must fix the
3388 ordering of these overlays, by moving overlays ends at POS before
3389 the overlays ends at PREV. */
3391 /* At first, find a place where disordered overlays should be linked
3392 in. It is where an overlay which end before POS exists. (i.e. an
3393 overlay whose ending marker is after-insertion-marker if disorder
3396 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCAR (tail
))))
3403 /* If we don't find such an overlay,
3404 or the found one ends before PREV,
3405 or the found one is the last one in the list,
3406 we don't have to fix anything. */
3409 || NILP (XCDR (tail
)))
3412 right_pair
= parent
;
3416 /* Now, end position of overlays in the list TAIL should be before
3417 or equal to PREV. In the loop, an overlay which ends at POS is
3418 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3419 we found an overlay which ends before PREV, the remaining
3420 overlays are in correct order. */
3421 while (!NILP (tail
))
3423 end
= OVERLAY_POSITION (OVERLAY_END (XCAR (tail
)));
3426 { /* This overlay is disordered. */
3427 Lisp_Object found
= tail
;
3429 /* Unlink the found overlay. */
3430 tail
= XCDR (found
);
3431 XSETCDR (parent
, tail
);
3432 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3433 and link it into the right place. */
3434 if (NILP (right_pair
))
3436 XSETCDR (found
, bp
->overlays_before
);
3437 bp
->overlays_before
= found
;
3441 XSETCDR (found
, XCDR (right_pair
));
3442 XSETCDR (right_pair
, found
);
3445 else if (end
== prev
)
3450 else /* No more disordered overlay. */
3455 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3456 doc
: /* Return t if OBJECT is an overlay. */)
3460 return (OVERLAYP (object
) ? Qt
: Qnil
);
3463 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3464 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3465 If omitted, BUFFER defaults to the current buffer.
3466 BEG and END may be integers or markers.
3467 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3468 front delimiter advance when text is inserted there.
3469 The fifth arg REAR-ADVANCE, if non-nil, makes the
3470 rear delimiter advance when text is inserted there. */)
3471 (beg
, end
, buffer
, front_advance
, rear_advance
)
3472 Lisp_Object beg
, end
, buffer
;
3473 Lisp_Object front_advance
, rear_advance
;
3475 Lisp_Object overlay
;
3479 XSETBUFFER (buffer
, current_buffer
);
3481 CHECK_BUFFER (buffer
);
3483 && ! EQ (Fmarker_buffer (beg
), buffer
))
3484 error ("Marker points into wrong buffer");
3486 && ! EQ (Fmarker_buffer (end
), buffer
))
3487 error ("Marker points into wrong buffer");
3489 CHECK_NUMBER_COERCE_MARKER (beg
);
3490 CHECK_NUMBER_COERCE_MARKER (end
);
3492 if (XINT (beg
) > XINT (end
))
3495 temp
= beg
; beg
= end
; end
= temp
;
3498 b
= XBUFFER (buffer
);
3500 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3501 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3503 if (!NILP (front_advance
))
3504 XMARKER (beg
)->insertion_type
= 1;
3505 if (!NILP (rear_advance
))
3506 XMARKER (end
)->insertion_type
= 1;
3508 overlay
= allocate_misc ();
3509 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3510 XOVERLAY (overlay
)->start
= beg
;
3511 XOVERLAY (overlay
)->end
= end
;
3512 XOVERLAY (overlay
)->plist
= Qnil
;
3514 /* Put the new overlay on the wrong list. */
3515 end
= OVERLAY_END (overlay
);
3516 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3517 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3519 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3521 /* This puts it in the right list, and in the right order. */
3522 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3524 /* We don't need to redisplay the region covered by the overlay, because
3525 the overlay has no properties at the moment. */
3530 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3533 modify_overlay (buf
, start
, end
)
3544 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3546 /* If this is a buffer not in the selected window,
3547 we must do other windows. */
3548 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3549 windows_or_buffers_changed
= 1;
3550 /* If multiple windows show this buffer, we must do other windows. */
3551 else if (buffer_shared
> 1)
3552 windows_or_buffers_changed
= 1;
3554 ++BUF_OVERLAY_MODIFF (buf
);
3558 Lisp_Object
Fdelete_overlay ();
3560 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3561 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3562 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3563 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3565 (overlay
, beg
, end
, buffer
)
3566 Lisp_Object overlay
, beg
, end
, buffer
;
3568 struct buffer
*b
, *ob
;
3569 Lisp_Object obuffer
;
3570 int count
= specpdl_ptr
- specpdl
;
3572 CHECK_OVERLAY (overlay
);
3574 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3576 XSETBUFFER (buffer
, current_buffer
);
3577 CHECK_BUFFER (buffer
);
3580 && ! EQ (Fmarker_buffer (beg
), buffer
))
3581 error ("Marker points into wrong buffer");
3583 && ! EQ (Fmarker_buffer (end
), buffer
))
3584 error ("Marker points into wrong buffer");
3586 CHECK_NUMBER_COERCE_MARKER (beg
);
3587 CHECK_NUMBER_COERCE_MARKER (end
);
3589 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3590 return Fdelete_overlay (overlay
);
3592 if (XINT (beg
) > XINT (end
))
3595 temp
= beg
; beg
= end
; end
= temp
;
3598 specbind (Qinhibit_quit
, Qt
);
3600 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3601 b
= XBUFFER (buffer
);
3602 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3604 /* If the overlay has changed buffers, do a thorough redisplay. */
3605 if (!EQ (buffer
, obuffer
))
3607 /* Redisplay where the overlay was. */
3608 if (!NILP (obuffer
))
3613 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3614 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3616 modify_overlay (ob
, o_beg
, o_end
);
3619 /* Redisplay where the overlay is going to be. */
3620 modify_overlay (b
, XINT (beg
), XINT (end
));
3623 /* Redisplay the area the overlay has just left, or just enclosed. */
3627 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3628 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3630 if (o_beg
== XINT (beg
))
3631 modify_overlay (b
, o_end
, XINT (end
));
3632 else if (o_end
== XINT (end
))
3633 modify_overlay (b
, o_beg
, XINT (beg
));
3636 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3637 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3638 modify_overlay (b
, o_beg
, o_end
);
3642 if (!NILP (obuffer
))
3644 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3645 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3648 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3649 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3651 /* Put the overlay on the wrong list. */
3652 end
= OVERLAY_END (overlay
);
3653 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3654 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3656 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3658 /* This puts it in the right list, and in the right order. */
3659 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3661 return unbind_to (count
, overlay
);
3664 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3665 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3667 Lisp_Object overlay
;
3671 int count
= specpdl_ptr
- specpdl
;
3673 CHECK_OVERLAY (overlay
);
3675 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3679 b
= XBUFFER (buffer
);
3680 specbind (Qinhibit_quit
, Qt
);
3682 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3683 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3685 marker_position (OVERLAY_START (overlay
)),
3686 marker_position (OVERLAY_END (overlay
)));
3687 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3688 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3690 /* When deleting an overlay with before or after strings, turn off
3691 display optimizations for the affected buffer, on the basis that
3692 these strings may contain newlines. This is easier to do than to
3693 check for that situation during redisplay. */
3694 if (!windows_or_buffers_changed
3695 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3696 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3697 b
->prevent_redisplay_optimizations_p
= 1;
3699 return unbind_to (count
, Qnil
);
3702 /* Overlay dissection functions. */
3704 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3705 doc
: /* Return the position at which OVERLAY starts. */)
3707 Lisp_Object overlay
;
3709 CHECK_OVERLAY (overlay
);
3711 return (Fmarker_position (OVERLAY_START (overlay
)));
3714 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3715 doc
: /* Return the position at which OVERLAY ends. */)
3717 Lisp_Object overlay
;
3719 CHECK_OVERLAY (overlay
);
3721 return (Fmarker_position (OVERLAY_END (overlay
)));
3724 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3725 doc
: /* Return the buffer OVERLAY belongs to. */)
3727 Lisp_Object overlay
;
3729 CHECK_OVERLAY (overlay
);
3731 return Fmarker_buffer (OVERLAY_START (overlay
));
3734 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3735 doc
: /* Return a list of the properties on OVERLAY.
3736 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3739 Lisp_Object overlay
;
3741 CHECK_OVERLAY (overlay
);
3743 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3747 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3748 doc
: /* Return a list of the overlays that contain position POS. */)
3753 Lisp_Object
*overlay_vec
;
3757 CHECK_NUMBER_COERCE_MARKER (pos
);
3760 /* We can't use alloca here because overlays_at can call xrealloc. */
3761 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3763 /* Put all the overlays we want in a vector in overlay_vec.
3764 Store the length in len. */
3765 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3766 (int *) 0, (int *) 0, 0);
3768 /* Make a list of them all. */
3769 result
= Flist (noverlays
, overlay_vec
);
3771 xfree (overlay_vec
);
3775 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3776 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3777 Overlap means that at least one character is contained within the overlay
3778 and also contained within the specified region.
3779 Empty overlays are included in the result if they are located at BEG
3780 or between BEG and END. */)
3782 Lisp_Object beg
, end
;
3785 Lisp_Object
*overlay_vec
;
3789 CHECK_NUMBER_COERCE_MARKER (beg
);
3790 CHECK_NUMBER_COERCE_MARKER (end
);
3793 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3795 /* Put all the overlays we want in a vector in overlay_vec.
3796 Store the length in len. */
3797 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3798 (int *) 0, (int *) 0);
3800 /* Make a list of them all. */
3801 result
= Flist (noverlays
, overlay_vec
);
3803 xfree (overlay_vec
);
3807 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3809 doc
: /* Return the next position after POS where an overlay starts or ends.
3810 If there are no more overlay boundaries after POS, return (point-max). */)
3816 Lisp_Object
*overlay_vec
;
3820 CHECK_NUMBER_COERCE_MARKER (pos
);
3823 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3825 /* Put all the overlays we want in a vector in overlay_vec.
3826 Store the length in len.
3827 endpos gets the position where the next overlay starts. */
3828 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3829 &endpos
, (int *) 0, 1);
3831 /* If any of these overlays ends before endpos,
3832 use its ending point instead. */
3833 for (i
= 0; i
< noverlays
; i
++)
3838 oend
= OVERLAY_END (overlay_vec
[i
]);
3839 oendpos
= OVERLAY_POSITION (oend
);
3840 if (oendpos
< endpos
)
3844 xfree (overlay_vec
);
3845 return make_number (endpos
);
3848 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3849 Sprevious_overlay_change
, 1, 1, 0,
3850 doc
: /* Return the previous position before POS where an overlay starts or ends.
3851 If there are no more overlay boundaries before POS, return (point-min). */)
3857 Lisp_Object
*overlay_vec
;
3860 CHECK_NUMBER_COERCE_MARKER (pos
);
3862 /* At beginning of buffer, we know the answer;
3863 avoid bug subtracting 1 below. */
3864 if (XINT (pos
) == BEGV
)
3868 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3870 /* Put all the overlays we want in a vector in overlay_vec.
3871 Store the length in len.
3872 prevpos gets the position of the previous change. */
3873 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3874 (int *) 0, &prevpos
, 1);
3876 xfree (overlay_vec
);
3877 return make_number (prevpos
);
3880 /* These functions are for debugging overlays. */
3882 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3883 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3884 The car has all the overlays before the overlay center;
3885 the cdr has all the overlays after the overlay center.
3886 Recentering overlays moves overlays between these lists.
3887 The lists you get are copies, so that changing them has no effect.
3888 However, the overlays you get are the real objects that the buffer uses. */)
3891 Lisp_Object before
, after
;
3892 before
= current_buffer
->overlays_before
;
3894 before
= Fcopy_sequence (before
);
3895 after
= current_buffer
->overlays_after
;
3897 after
= Fcopy_sequence (after
);
3899 return Fcons (before
, after
);
3902 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3903 doc
: /* Recenter the overlays of the current buffer around position POS. */)
3907 CHECK_NUMBER_COERCE_MARKER (pos
);
3909 recenter_overlay_lists (current_buffer
, XINT (pos
));
3913 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3914 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
3916 Lisp_Object overlay
, prop
;
3918 CHECK_OVERLAY (overlay
);
3919 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
3922 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3923 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
3924 (overlay
, prop
, value
)
3925 Lisp_Object overlay
, prop
, value
;
3927 Lisp_Object tail
, buffer
;
3930 CHECK_OVERLAY (overlay
);
3932 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3934 for (tail
= XOVERLAY (overlay
)->plist
;
3935 CONSP (tail
) && CONSP (XCDR (tail
));
3936 tail
= XCDR (XCDR (tail
)))
3937 if (EQ (XCAR (tail
), prop
))
3939 changed
= !EQ (XCAR (XCDR (tail
)), value
);
3940 XSETCAR (XCDR (tail
), value
);
3943 /* It wasn't in the list, so add it to the front. */
3944 changed
= !NILP (value
);
3945 XOVERLAY (overlay
)->plist
3946 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3948 if (! NILP (buffer
))
3951 modify_overlay (XBUFFER (buffer
),
3952 marker_position (OVERLAY_START (overlay
)),
3953 marker_position (OVERLAY_END (overlay
)));
3954 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3955 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3956 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3957 Fdelete_overlay (overlay
);
3962 /* Subroutine of report_overlay_modification. */
3964 /* Lisp vector holding overlay hook functions to call.
3965 Vector elements come in pairs.
3966 Each even-index element is a list of hook functions.
3967 The following odd-index element is the overlay they came from.
3969 Before the buffer change, we fill in this vector
3970 as we call overlay hook functions.
3971 After the buffer change, we get the functions to call from this vector.
3972 This way we always call the same functions before and after the change. */
3973 static Lisp_Object last_overlay_modification_hooks
;
3975 /* Number of elements actually used in last_overlay_modification_hooks. */
3976 static int last_overlay_modification_hooks_used
;
3978 /* Add one functionlist/overlay pair
3979 to the end of last_overlay_modification_hooks. */
3982 add_overlay_mod_hooklist (functionlist
, overlay
)
3983 Lisp_Object functionlist
, overlay
;
3985 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3987 if (last_overlay_modification_hooks_used
== oldsize
)
3990 old
= last_overlay_modification_hooks
;
3991 last_overlay_modification_hooks
3992 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3993 bcopy (XVECTOR (old
)->contents
,
3994 XVECTOR (last_overlay_modification_hooks
)->contents
,
3995 sizeof (Lisp_Object
) * oldsize
);
3997 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3998 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
4001 /* Run the modification-hooks of overlays that include
4002 any part of the text in START to END.
4003 If this change is an insertion, also
4004 run the insert-before-hooks of overlay starting at END,
4005 and the insert-after-hooks of overlay ending at START.
4007 This is called both before and after the modification.
4008 AFTER is nonzero when we call after the modification.
4010 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4011 When AFTER is nonzero, they are the start position,
4012 the position after the inserted new text,
4013 and the length of deleted or replaced old text. */
4016 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4017 Lisp_Object start
, end
;
4019 Lisp_Object arg1
, arg2
, arg3
;
4021 Lisp_Object prop
, overlay
, tail
;
4022 /* 1 if this change is an insertion. */
4023 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4025 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
4029 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
4033 /* Call the functions recorded in last_overlay_modification_hooks
4034 rather than scanning the overlays again.
4035 First copy the vector contents, in case some of these hooks
4036 do subsequent modification of the buffer. */
4037 int size
= last_overlay_modification_hooks_used
;
4038 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4041 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4042 copy
, size
* sizeof (Lisp_Object
));
4044 gcpro1
.nvars
= size
;
4046 for (i
= 0; i
< size
;)
4048 Lisp_Object prop
, overlay
;
4050 overlay
= copy
[i
++];
4051 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4057 /* We are being called before a change.
4058 Scan the overlays to find the functions to call. */
4059 last_overlay_modification_hooks_used
= 0;
4061 for (tail
= current_buffer
->overlays_before
;
4065 int startpos
, endpos
;
4066 Lisp_Object ostart
, oend
;
4068 overlay
= XCAR (tail
);
4070 ostart
= OVERLAY_START (overlay
);
4071 oend
= OVERLAY_END (overlay
);
4072 endpos
= OVERLAY_POSITION (oend
);
4073 if (XFASTINT (start
) > endpos
)
4075 startpos
= OVERLAY_POSITION (ostart
);
4076 if (insertion
&& (XFASTINT (start
) == startpos
4077 || XFASTINT (end
) == startpos
))
4079 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4082 /* Copy TAIL in case the hook recenters the overlay lists. */
4084 tail
= Fcopy_sequence (tail
);
4086 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4089 if (insertion
&& (XFASTINT (start
) == endpos
4090 || XFASTINT (end
) == endpos
))
4092 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4096 tail
= Fcopy_sequence (tail
);
4098 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4101 /* Test for intersecting intervals. This does the right thing
4102 for both insertion and deletion. */
4103 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4105 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4109 tail
= Fcopy_sequence (tail
);
4111 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4117 for (tail
= current_buffer
->overlays_after
;
4121 int startpos
, endpos
;
4122 Lisp_Object ostart
, oend
;
4124 overlay
= XCAR (tail
);
4126 ostart
= OVERLAY_START (overlay
);
4127 oend
= OVERLAY_END (overlay
);
4128 startpos
= OVERLAY_POSITION (ostart
);
4129 endpos
= OVERLAY_POSITION (oend
);
4130 if (XFASTINT (end
) < startpos
)
4132 if (insertion
&& (XFASTINT (start
) == startpos
4133 || XFASTINT (end
) == startpos
))
4135 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4139 tail
= Fcopy_sequence (tail
);
4141 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4144 if (insertion
&& (XFASTINT (start
) == endpos
4145 || XFASTINT (end
) == endpos
))
4147 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4151 tail
= Fcopy_sequence (tail
);
4153 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4156 /* Test for intersecting intervals. This does the right thing
4157 for both insertion and deletion. */
4158 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4160 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4164 tail
= Fcopy_sequence (tail
);
4166 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4175 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4176 Lisp_Object list
, overlay
;
4178 Lisp_Object arg1
, arg2
, arg3
;
4180 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4182 GCPRO4 (list
, arg1
, arg2
, arg3
);
4184 add_overlay_mod_hooklist (list
, overlay
);
4186 while (!NILP (list
))
4189 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4191 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4197 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4200 evaporate_overlays (pos
)
4203 Lisp_Object tail
, overlay
, hit_list
;
4206 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
4207 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
4211 overlay
= XCAR (tail
);
4212 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4215 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4216 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4217 hit_list
= Fcons (overlay
, hit_list
);
4220 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
4224 overlay
= XCAR (tail
);
4225 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4228 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4229 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4230 hit_list
= Fcons (overlay
, hit_list
);
4232 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4233 Fdelete_overlay (XCAR (hit_list
));
4236 /* Somebody has tried to store a value with an unacceptable type
4237 in the slot with offset OFFSET. */
4240 buffer_slot_type_mismatch (offset
)
4246 switch (XINT (PER_BUFFER_TYPE (offset
)))
4249 type_name
= "integers";
4253 type_name
= "strings";
4257 type_name
= "symbols";
4264 sym
= PER_BUFFER_SYMBOL (offset
);
4265 error ("Only %s should be stored in the buffer-local variable %s",
4266 type_name
, XSTRING (SYMBOL_NAME (sym
))->data
);
4270 /***********************************************************************
4271 Allocation with mmap
4272 ***********************************************************************/
4274 #ifdef USE_MMAP_FOR_BUFFERS
4276 #include <sys/types.h>
4277 #include <sys/mman.h>
4280 #ifdef MAP_ANONYMOUS
4281 #define MAP_ANON MAP_ANONYMOUS
4288 #define MAP_FAILED ((void *) -1)
4301 /* Memory is allocated in regions which are mapped using mmap(2).
4302 The current implementation lets the system select mapped
4303 addresses; we're not using MAP_FIXED in general, except when
4304 trying to enlarge regions.
4306 Each mapped region starts with a mmap_region structure, the user
4307 area starts after that structure, aligned to MEM_ALIGN.
4309 +-----------------------+
4310 | struct mmap_info + |
4312 +-----------------------+
4316 +-----------------------+ */
4320 /* User-specified size. */
4321 size_t nbytes_specified
;
4323 /* Number of bytes mapped */
4324 size_t nbytes_mapped
;
4326 /* Pointer to the location holding the address of the memory
4327 allocated with the mmap'd block. The variable actually points
4328 after this structure. */
4331 /* Next and previous in list of all mmap'd regions. */
4332 struct mmap_region
*next
, *prev
;
4335 /* Doubly-linked list of mmap'd regions. */
4337 static struct mmap_region
*mmap_regions
;
4339 /* File descriptor for mmap. If we don't have anonymous mapping,
4340 /dev/zero will be opened on it. */
4344 /* Temporary storage for mmap_set_vars, see there. */
4346 static struct mmap_region
*mmap_regions_1
;
4347 static int mmap_fd_1
;
4349 /* Page size on this system. */
4351 static int mmap_page_size
;
4353 /* 1 means mmap has been intialized. */
4355 static int mmap_initialized_p
;
4357 /* Value is X rounded up to the next multiple of N. */
4359 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4361 /* Size of mmap_region structure plus padding. */
4363 #define MMAP_REGION_STRUCT_SIZE \
4364 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4366 /* Given a pointer P to the start of the user-visible part of a mapped
4367 region, return a pointer to the start of the region. */
4369 #define MMAP_REGION(P) \
4370 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4372 /* Given a pointer P to the start of a mapped region, return a pointer
4373 to the start of the user-visible part of the region. */
4375 #define MMAP_USER_AREA(P) \
4376 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4378 #define MEM_ALIGN sizeof (double)
4380 /* Predicate returning true if part of the address range [START ..
4381 END[ is currently mapped. Used to prevent overwriting an existing
4384 Default is to conservativly assume the address range is occupied by
4385 something else. This can be overridden by system configuration
4386 files if system-specific means to determine this exists. */
4388 #ifndef MMAP_ALLOCATED_P
4389 #define MMAP_ALLOCATED_P(start, end) 1
4392 /* Function prototypes. */
4394 static int mmap_free_1
P_ ((struct mmap_region
*));
4395 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4396 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4397 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4398 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4399 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4400 static void mmap_init
P_ ((void));
4403 /* Return a region overlapping address range START...END, or null if
4404 none. END is not including, i.e. the last byte in the range
4407 static struct mmap_region
*
4408 mmap_find (start
, end
)
4409 POINTER_TYPE
*start
, *end
;
4411 struct mmap_region
*r
;
4412 char *s
= (char *) start
, *e
= (char *) end
;
4414 for (r
= mmap_regions
; r
; r
= r
->next
)
4416 char *rstart
= (char *) r
;
4417 char *rend
= rstart
+ r
->nbytes_mapped
;
4419 if (/* First byte of range, i.e. START, in this region? */
4420 (s
>= rstart
&& s
< rend
)
4421 /* Last byte of range, i.e. END - 1, in this region? */
4422 || (e
> rstart
&& e
<= rend
)
4423 /* First byte of this region in the range? */
4424 || (rstart
>= s
&& rstart
< e
)
4425 /* Last byte of this region in the range? */
4426 || (rend
> s
&& rend
<= e
))
4434 /* Unmap a region. P is a pointer to the start of the user-araa of
4435 the region. Value is non-zero if successful. */
4439 struct mmap_region
*r
;
4442 r
->next
->prev
= r
->prev
;
4444 r
->prev
->next
= r
->next
;
4446 mmap_regions
= r
->next
;
4448 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4450 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4458 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4459 Value is non-zero if successful. */
4462 mmap_enlarge (r
, npages
)
4463 struct mmap_region
*r
;
4466 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4472 /* Unmap pages at the end of the region. */
4473 nbytes
= - npages
* mmap_page_size
;
4474 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4475 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4478 r
->nbytes_mapped
-= nbytes
;
4482 else if (npages
> 0)
4484 nbytes
= npages
* mmap_page_size
;
4486 /* Try to map additional pages at the end of the region. We
4487 cannot do this if the address range is already occupied by
4488 something else because mmap deletes any previous mapping.
4489 I'm not sure this is worth doing, let's see. */
4490 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4494 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4495 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4496 if (p
== MAP_FAILED
)
4497 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4498 else if (p
!= (POINTER_TYPE
*) region_end
)
4500 /* Kernels are free to choose a different address. In
4501 that case, unmap what we've mapped above; we have
4503 if (munmap (p
, nbytes
) == -1)
4504 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4508 r
->nbytes_mapped
+= nbytes
;
4518 /* Set or reset variables holding references to mapped regions. If
4519 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4520 non-zero, set all variables to the start of the user-areas
4523 This function is called from Fdump_emacs to ensure that the dumped
4524 Emacs doesn't contain references to memory that won't be mapped
4525 when Emacs starts. */
4528 mmap_set_vars (restore_p
)
4531 struct mmap_region
*r
;
4535 mmap_regions
= mmap_regions_1
;
4536 mmap_fd
= mmap_fd_1
;
4537 for (r
= mmap_regions
; r
; r
= r
->next
)
4538 *r
->var
= MMAP_USER_AREA (r
);
4542 for (r
= mmap_regions
; r
; r
= r
->next
)
4544 mmap_regions_1
= mmap_regions
;
4545 mmap_regions
= NULL
;
4546 mmap_fd_1
= mmap_fd
;
4552 /* Allocate a block of storage large enough to hold NBYTES bytes of
4553 data. A pointer to the data is returned in *VAR. VAR is thus the
4554 address of some variable which will use the data area.
4556 The allocation of 0 bytes is valid.
4558 If we can't allocate the necessary memory, set *VAR to null, and
4561 static POINTER_TYPE
*
4562 mmap_alloc (var
, nbytes
)
4571 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4572 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4575 if (p
== MAP_FAILED
)
4577 if (errno
!= ENOMEM
)
4578 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4583 struct mmap_region
*r
= (struct mmap_region
*) p
;
4585 r
->nbytes_specified
= nbytes
;
4586 r
->nbytes_mapped
= map
;
4589 r
->next
= mmap_regions
;
4594 p
= MMAP_USER_AREA (p
);
4601 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4602 resize it to size NBYTES. Change *VAR to reflect the new block,
4603 and return this value. If more memory cannot be allocated, then
4604 leave *VAR unchanged, and return null. */
4606 static POINTER_TYPE
*
4607 mmap_realloc (var
, nbytes
)
4611 POINTER_TYPE
*result
;
4616 result
= mmap_alloc (var
, nbytes
);
4617 else if (nbytes
== 0)
4620 result
= mmap_alloc (var
, nbytes
);
4624 struct mmap_region
*r
= MMAP_REGION (*var
);
4625 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4630 POINTER_TYPE
*old_ptr
= *var
;
4632 /* Try to map additional pages at the end of the region.
4633 If that fails, allocate a new region, copy data
4634 from the old region, then free it. */
4635 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4638 r
->nbytes_specified
= nbytes
;
4639 *var
= result
= old_ptr
;
4641 else if (mmap_alloc (var
, nbytes
))
4643 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4644 mmap_free_1 (MMAP_REGION (old_ptr
));
4646 r
= MMAP_REGION (result
);
4647 r
->nbytes_specified
= nbytes
;
4655 else if (room
- nbytes
>= mmap_page_size
)
4657 /* Shrinking by at least a page. Let's give some
4658 memory back to the system. */
4659 mmap_enlarge (r
, - (room
- nbytes
) / mmap_page_size
);
4661 r
->nbytes_specified
= nbytes
;
4665 /* Leave it alone. */
4667 r
->nbytes_specified
= nbytes
;
4675 /* Free a block of relocatable storage whose data is pointed to by
4676 PTR. Store 0 in *PTR to show there's no block allocated. */
4686 mmap_free_1 (MMAP_REGION (*var
));
4692 /* Perform necessary intializations for the use of mmap. */
4698 /* The value of mmap_fd is initially 0 in temacs, and -1
4699 in a dumped Emacs. */
4702 /* No anonymous mmap -- we need the file descriptor. */
4703 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4705 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4707 #endif /* MAP_ANON == 0 */
4709 if (mmap_initialized_p
)
4711 mmap_initialized_p
= 1;
4717 mmap_page_size
= getpagesize ();
4720 #endif /* USE_MMAP_FOR_BUFFERS */
4724 /***********************************************************************
4725 Buffer-text Allocation
4726 ***********************************************************************/
4729 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4730 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4731 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4732 #endif /* REL_ALLOC */
4735 /* Allocate NBYTES bytes for buffer B's text buffer. */
4738 alloc_buffer_text (b
, nbytes
)
4745 #if defined USE_MMAP_FOR_BUFFERS
4746 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4747 #elif defined REL_ALLOC
4748 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4750 p
= xmalloc (nbytes
);
4759 b
->text
->beg
= (unsigned char *) p
;
4763 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4767 enlarge_buffer_text (b
, delta
)
4772 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4775 #if defined USE_MMAP_FOR_BUFFERS
4776 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4777 #elif defined REL_ALLOC
4778 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4780 p
= xrealloc (b
->text
->beg
, nbytes
);
4789 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4794 /* Free buffer B's text buffer. */
4797 free_buffer_text (b
)
4802 #if defined USE_MMAP_FOR_BUFFERS
4803 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4804 #elif defined REL_ALLOC
4805 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4807 xfree (b
->text
->beg
);
4810 BUF_BEG_ADDR (b
) = NULL
;
4816 /***********************************************************************
4818 ***********************************************************************/
4825 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4827 /* Make sure all markable slots in buffer_defaults
4828 are initialized reasonably, so mark_buffer won't choke. */
4829 reset_buffer (&buffer_defaults
);
4830 reset_buffer_local_variables (&buffer_defaults
, 1);
4831 reset_buffer (&buffer_local_symbols
);
4832 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4833 /* Prevent GC from getting confused. */
4834 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4835 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4836 BUF_INTERVALS (&buffer_defaults
) = 0;
4837 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4838 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4839 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4841 /* Set up the default values of various buffer slots. */
4842 /* Must do these before making the first buffer! */
4844 /* real setup is done in bindings.el */
4845 buffer_defaults
.mode_line_format
= build_string ("%-");
4846 buffer_defaults
.header_line_format
= Qnil
;
4847 buffer_defaults
.abbrev_mode
= Qnil
;
4848 buffer_defaults
.overwrite_mode
= Qnil
;
4849 buffer_defaults
.case_fold_search
= Qt
;
4850 buffer_defaults
.auto_fill_function
= Qnil
;
4851 buffer_defaults
.selective_display
= Qnil
;
4853 buffer_defaults
.selective_display_ellipses
= Qt
;
4855 buffer_defaults
.abbrev_table
= Qnil
;
4856 buffer_defaults
.display_table
= Qnil
;
4857 buffer_defaults
.undo_list
= Qnil
;
4858 buffer_defaults
.mark_active
= Qnil
;
4859 buffer_defaults
.file_format
= Qnil
;
4860 buffer_defaults
.overlays_before
= Qnil
;
4861 buffer_defaults
.overlays_after
= Qnil
;
4862 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
4864 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4865 buffer_defaults
.truncate_lines
= Qnil
;
4866 buffer_defaults
.ctl_arrow
= Qt
;
4867 buffer_defaults
.direction_reversed
= Qnil
;
4868 buffer_defaults
.cursor_type
= Qt
;
4869 buffer_defaults
.extra_line_spacing
= Qnil
;
4872 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4874 buffer_defaults
.enable_multibyte_characters
= Qt
;
4875 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4876 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4877 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4878 buffer_defaults
.cache_long_line_scans
= Qnil
;
4879 buffer_defaults
.file_truename
= Qnil
;
4880 XSETFASTINT (buffer_defaults
.display_count
, 0);
4881 buffer_defaults
.indicate_empty_lines
= Qnil
;
4882 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4883 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4884 buffer_defaults
.display_time
= Qnil
;
4886 /* Assign the local-flags to the slots that have default values.
4887 The local flag is a bit that is used in the buffer
4888 to say that it has its own local value for the slot.
4889 The local flag bits are in the local_var_flags slot of the buffer. */
4891 /* Nothing can work if this isn't true */
4892 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4894 /* 0 means not a lisp var, -1 means always local, else mask */
4895 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4896 XSETINT (buffer_local_flags
.filename
, -1);
4897 XSETINT (buffer_local_flags
.directory
, -1);
4898 XSETINT (buffer_local_flags
.backed_up
, -1);
4899 XSETINT (buffer_local_flags
.save_length
, -1);
4900 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
4901 XSETINT (buffer_local_flags
.read_only
, -1);
4902 XSETINT (buffer_local_flags
.major_mode
, -1);
4903 XSETINT (buffer_local_flags
.mode_name
, -1);
4904 XSETINT (buffer_local_flags
.undo_list
, -1);
4905 XSETINT (buffer_local_flags
.mark_active
, -1);
4906 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
4907 XSETINT (buffer_local_flags
.file_truename
, -1);
4908 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
4909 XSETINT (buffer_local_flags
.file_format
, -1);
4910 XSETINT (buffer_local_flags
.display_count
, -1);
4911 XSETINT (buffer_local_flags
.display_time
, -1);
4912 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
4915 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
4916 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
4917 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
4918 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
4919 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
4920 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
4922 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
4924 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
4925 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
4926 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
4927 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
4928 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
4929 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
4930 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
4932 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
4933 /* Make this one a permanent local. */
4934 buffer_permanent_local_flags
[idx
++] = 1;
4936 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
4937 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
4938 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
4939 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
4940 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
4941 /* Make this one a permanent local. */
4942 buffer_permanent_local_flags
[idx
++] = 1;
4943 XSETFASTINT (buffer_local_flags
.left_margin_width
, idx
); ++idx
;
4944 XSETFASTINT (buffer_local_flags
.right_margin_width
, idx
); ++idx
;
4945 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
4946 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
4947 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
4948 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
4949 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
4950 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
4952 /* Need more room? */
4953 if (idx
>= MAX_PER_BUFFER_VARS
)
4955 last_per_buffer_idx
= idx
;
4957 Vbuffer_alist
= Qnil
;
4961 QSFundamental
= build_string ("Fundamental");
4963 Qfundamental_mode
= intern ("fundamental-mode");
4964 buffer_defaults
.major_mode
= Qfundamental_mode
;
4966 Qmode_class
= intern ("mode-class");
4968 Qprotected_field
= intern ("protected-field");
4970 Qpermanent_local
= intern ("permanent-local");
4972 Qkill_buffer_hook
= intern ("kill-buffer-hook");
4974 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
4976 /* super-magic invisible buffer */
4977 Vbuffer_alist
= Qnil
;
4979 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4981 inhibit_modification_hooks
= 0;
4987 char buf
[MAXPATHLEN
+ 1];
4989 struct stat dotstat
, pwdstat
;
4993 #ifdef USE_MMAP_FOR_BUFFERS
4995 /* When using the ralloc implementation based on mmap(2), buffer
4996 text pointers will have been set to null in the dumped Emacs.
5000 for (b
= all_buffers
; b
; b
= b
->next
)
5001 if (b
->text
->beg
== NULL
)
5002 enlarge_buffer_text (b
, 0);
5004 #endif /* USE_MMAP_FOR_BUFFERS */
5006 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5007 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5008 Fset_buffer_multibyte (Qnil
);
5010 /* If PWD is accurate, use it instead of calling getwd. PWD is
5011 sometimes a nicer name, and using it may avoid a fatal error if a
5012 parent directory is searchable but not readable. */
5013 if ((pwd
= getenv ("PWD")) != 0
5014 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
5015 && stat (pwd
, &pwdstat
) == 0
5016 && stat (".", &dotstat
) == 0
5017 && dotstat
.st_ino
== pwdstat
.st_ino
5018 && dotstat
.st_dev
== pwdstat
.st_dev
5019 && strlen (pwd
) < MAXPATHLEN
)
5022 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
5023 fatal ("`getcwd' failed: %s\n", strerror (errno
));
5025 else if (getwd (buf
) == 0)
5026 fatal ("`getwd' failed: %s\n", buf
);
5030 /* Maybe this should really use some standard subroutine
5031 whose definition is filename syntax dependent. */
5033 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
5035 buf
[rc
] = DIRECTORY_SEP
;
5038 #endif /* not VMS */
5040 current_buffer
->directory
= build_string (buf
);
5042 /* Add /: to the front of the name
5043 if it would otherwise be treated as magic. */
5044 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5046 /* If the default dir is just /, TEMP is non-nil
5047 because of the ange-ftp completion handler.
5048 However, it is not necessary to turn / into /:/.
5049 So avoid doing that. */
5050 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
5051 current_buffer
->directory
5052 = concat2 (build_string ("/:"), current_buffer
->directory
);
5054 temp
= get_minibuffer (0);
5055 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5058 /* initialize the buffer routines */
5062 staticpro (&last_overlay_modification_hooks
);
5063 last_overlay_modification_hooks
5064 = Fmake_vector (make_number (10), Qnil
);
5066 staticpro (&Vbuffer_defaults
);
5067 staticpro (&Vbuffer_local_symbols
);
5068 staticpro (&Qfundamental_mode
);
5069 staticpro (&Qmode_class
);
5070 staticpro (&QSFundamental
);
5071 staticpro (&Vbuffer_alist
);
5072 staticpro (&Qprotected_field
);
5073 staticpro (&Qpermanent_local
);
5074 staticpro (&Qkill_buffer_hook
);
5075 Qoverlayp
= intern ("overlayp");
5076 staticpro (&Qoverlayp
);
5077 Qevaporate
= intern ("evaporate");
5078 staticpro (&Qevaporate
);
5079 Qmodification_hooks
= intern ("modification-hooks");
5080 staticpro (&Qmodification_hooks
);
5081 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5082 staticpro (&Qinsert_in_front_hooks
);
5083 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5084 staticpro (&Qinsert_behind_hooks
);
5085 Qget_file_buffer
= intern ("get-file-buffer");
5086 staticpro (&Qget_file_buffer
);
5087 Qpriority
= intern ("priority");
5088 staticpro (&Qpriority
);
5089 Qwindow
= intern ("window");
5090 staticpro (&Qwindow
);
5091 Qbefore_string
= intern ("before-string");
5092 staticpro (&Qbefore_string
);
5093 Qafter_string
= intern ("after-string");
5094 staticpro (&Qafter_string
);
5095 Qfirst_change_hook
= intern ("first-change-hook");
5096 staticpro (&Qfirst_change_hook
);
5097 Qbefore_change_functions
= intern ("before-change-functions");
5098 staticpro (&Qbefore_change_functions
);
5099 Qafter_change_functions
= intern ("after-change-functions");
5100 staticpro (&Qafter_change_functions
);
5102 Fput (Qprotected_field
, Qerror_conditions
,
5103 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5104 Fput (Qprotected_field
, Qerror_message
,
5105 build_string ("Attempt to modify a protected field"));
5107 /* All these use DEFVAR_LISP_NOPRO because the slots in
5108 buffer_defaults will all be marked via Vbuffer_defaults. */
5110 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5111 &buffer_defaults
.mode_line_format
,
5112 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5113 This is the same as (default-value 'mode-line-format). */);
5115 DEFVAR_LISP_NOPRO ("default-header-line-format",
5116 &buffer_defaults
.header_line_format
,
5117 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5118 This is the same as (default-value 'header-line-format). */);
5120 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5121 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5122 This is the same as (default-value 'cursor-type). */);
5124 DEFVAR_LISP_NOPRO ("default-line-spacing",
5125 &buffer_defaults
.extra_line_spacing
,
5126 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5127 This is the same as (default-value 'line-spacing). */);
5129 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5130 &buffer_defaults
.abbrev_mode
,
5131 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5132 This is the same as (default-value 'abbrev-mode). */);
5134 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5135 &buffer_defaults
.ctl_arrow
,
5136 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5137 This is the same as (default-value 'ctl-arrow). */);
5139 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5140 &buffer_defaults
.direction_reversed
,
5141 doc
: /* Default value of `direction_reversed' for buffers that do not override it.
5142 This is the same as (default-value 'direction-reversed). */);
5144 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5145 &buffer_defaults
.enable_multibyte_characters
,
5146 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5147 This is the same as (default-value 'enable-multibyte-characters). */);
5149 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5150 &buffer_defaults
.buffer_file_coding_system
,
5151 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5152 This is the same as (default-value 'buffer-file-coding-system). */);
5154 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5155 &buffer_defaults
.truncate_lines
,
5156 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5157 This is the same as (default-value 'truncate-lines). */);
5159 DEFVAR_LISP_NOPRO ("default-fill-column",
5160 &buffer_defaults
.fill_column
,
5161 doc
: /* Default value of `fill-column' for buffers that do not override it.
5162 This is the same as (default-value 'fill-column). */);
5164 DEFVAR_LISP_NOPRO ("default-left-margin",
5165 &buffer_defaults
.left_margin
,
5166 doc
: /* Default value of `left-margin' for buffers that do not override it.
5167 This is the same as (default-value 'left-margin). */);
5169 DEFVAR_LISP_NOPRO ("default-tab-width",
5170 &buffer_defaults
.tab_width
,
5171 doc
: /* Default value of `tab-width' for buffers that do not override it.
5172 This is the same as (default-value 'tab-width). */);
5174 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5175 &buffer_defaults
.case_fold_search
,
5176 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5177 This is the same as (default-value 'case-fold-search). */);
5180 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5181 &buffer_defaults
.buffer_file_type
,
5182 doc
: /* Default file type for buffers that do not override it.
5183 This is the same as (default-value 'buffer-file-type).
5184 The file type is nil for text, t for binary. */);
5187 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5188 &buffer_defaults
.left_margin_width
,
5189 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5190 This is the same as (default-value 'left-margin-width). */);
5192 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5193 &buffer_defaults
.right_margin_width
,
5194 doc
: /* Default value of `right_margin_width' for buffers that don't override it.
5195 This is the same as (default-value 'right-margin-width). */);
5197 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5198 &buffer_defaults
.indicate_empty_lines
,
5199 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5200 This is the same as (default-value 'indicate-empty-lines). */);
5202 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5203 &buffer_defaults
.scroll_up_aggressively
,
5204 doc
: /* Default value of `scroll-up-aggressively'.
5205 This value applies in buffers that don't have their own local values.
5206 This variable is an alias for (default-value 'scroll-up-aggressively). */);
5208 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5209 &buffer_defaults
.scroll_down_aggressively
,
5210 doc
: /* Default value of `scroll-down-aggressively'.
5211 This value applies in buffers that don't have their own local values.
5212 This variable is an alias for (default-value 'scroll-down-aggressively). */);
5214 DEFVAR_PER_BUFFER ("header-line-format",
5215 ¤t_buffer
->header_line_format
,
5217 doc
: /* Analogous to `mode-line-format', but controls the header line.
5218 The header line appears, optionally, at the top of a window;
5219 the mode line appears at the bottom. */);
5221 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5223 doc
: /* Template for displaying mode line for current buffer.
5224 Each buffer has its own value of this variable.
5225 Value may be nil, a string, a symbol or a list or cons cell.
5226 A value of nil means don't display a mode line.
5227 For a symbol, its value is used (but it is ignored if t or nil).
5228 A string appearing directly as the value of a symbol is processed verbatim
5229 in that the %-constructs below are not recognized.
5230 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5231 is used as a mode line element.
5232 For a list whose car is a symbol, the symbol's value is taken,
5233 and if that is non-nil, the cadr of the list is processed recursively.
5234 Otherwise, the caddr of the list (if there is one) is processed.
5235 For a list whose car is a string or list, each element is processed
5236 recursively and the results are effectively concatenated.
5237 For a list whose car is an integer, the cdr of the list is processed
5238 and padded (if the number is positive) or truncated (if negative)
5239 to the width specified by that number.
5240 A string is printed verbatim in the mode line except for %-constructs:
5241 (%-constructs are allowed when the string is the entire mode-line-format
5242 or when it is found in a cons-cell or a list)
5243 %b -- print buffer name. %f -- print visited file name.
5244 %F -- print frame name.
5245 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5246 %& is like %*, but ignore read-only-ness.
5247 % means buffer is read-only and * means it is modified.
5248 For a modified read-only buffer, %* gives % and %+ gives *.
5249 %s -- print process status. %l -- print the current line number.
5250 %c -- print the current column number (this makes editing slower).
5251 To make the column number update correctly in all cases,
5252 `column-number-mode' must be non-nil.
5253 %p -- print percent of buffer above top of window, or Top, Bot or All.
5254 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5255 or print Bottom or All.
5256 %m -- print the mode name.
5257 %n -- print Narrow if appropriate.
5258 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5259 %Z -- like %z, but including the end-of-line format.
5260 %[ -- print one [ for each recursive editing level. %] similar.
5261 %% -- print %. %- -- print infinitely many dashes.
5262 Decimal digits after the % specify field width to which to pad. */);
5264 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5265 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5266 nil here means use current buffer's major mode. */);
5268 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5269 make_number (Lisp_Symbol
),
5270 doc
: /* Symbol for current buffer's major mode. */);
5272 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5274 doc
: /* Pretty name of current buffer's major mode (a string). */);
5276 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5277 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5279 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5281 doc
: /* *Non-nil if searches and matches should ignore case. */);
5283 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5284 make_number (Lisp_Int
),
5285 doc
: /* *Column beyond which automatic line-wrapping should happen. */);
5287 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5288 make_number (Lisp_Int
),
5289 doc
: /* *Column for the default indent-line-function to indent to.
5290 Linefeed indents to this column in Fundamental mode. */);
5292 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5293 make_number (Lisp_Int
),
5294 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5296 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5297 doc
: /* *Non-nil means display control chars with uparrow.
5298 A value of nil means use backslash and octal digits.
5299 This variable does not apply to characters whose display is specified
5300 in the current display table (if there is one). */);
5302 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5303 ¤t_buffer
->enable_multibyte_characters
,
5305 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5306 Otherwise they are regarded as unibyte. This affects the display,
5307 file I/O and the behavior of various editing commands.
5309 This variable is buffer-local but you cannot set it directly;
5310 use the function `set-buffer-multibyte' to change a buffer's representation.
5311 Changing its default value with `setq-default' is supported.
5312 See also variable `default-enable-multibyte-characters' and Info node
5313 `(elisp)Text Representations'. */);
5315 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5316 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5317 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5318 This variable applies to saving the buffer, and also to `write-region'
5319 and other functions that use `write-region'.
5320 It does not apply to sending output to subprocesses, however.
5322 If this is nil, the buffer is saved without any code conversion
5323 unless some coding system is specified in `file-coding-system-alist'
5324 for the buffer file.
5326 If the text to be saved cannot be encoded as specified by this variable,
5327 an alternative encoding is selected by `select-safe-coding-system', which see.
5329 The variable `coding-system-for-write', if non-nil, overrides this variable.
5331 This variable is never applied to a way of decoding a file while reading it. */);
5333 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5335 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5337 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5338 doc
: /* *Non-nil means do not display continuation lines.
5339 Instead, give each line of text just one screen line.
5341 Note that this is overridden by the variable
5342 `truncate-partial-width-windows' if that variable is non-nil
5343 and this buffer is not full-frame width. */);
5346 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5348 doc
: /* Non-nil if the visited file is a binary file.
5349 This variable is meaningful on MS-DOG and Windows NT.
5350 On those systems, it is automatically local in every buffer.
5351 On other systems, this variable is normally always nil. */);
5354 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5355 make_number (Lisp_String
),
5356 doc
: /* Name of default directory of current buffer. Should end with slash.
5357 To interactively change the default directory, use command `cd'. */);
5359 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5361 doc
: /* Function called (if non-nil) to perform auto-fill.
5362 It is called after self-inserting any character specified in
5363 the `auto-fill-chars' table.
5364 NOTE: This variable is not a hook;
5365 its value may not be a list of functions. */);
5367 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5368 make_number (Lisp_String
),
5369 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5371 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5372 make_number (Lisp_String
),
5373 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5374 The truename of a file is calculated by `file-truename'
5375 and then abbreviated with `abbreviate-file-name'. */);
5377 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5378 ¤t_buffer
->auto_save_file_name
,
5379 make_number (Lisp_String
),
5380 doc
: /* Name of file for auto-saving current buffer.
5381 If it is nil, that means don't auto-save this buffer. */);
5383 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5384 doc
: /* Non-nil if this buffer is read-only. */);
5386 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5387 doc
: /* Non-nil if this buffer's file has been backed up.
5388 Backing up is done before the first time the file is saved. */);
5390 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5391 make_number (Lisp_Int
),
5392 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5395 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5397 doc
: /* Non-nil enables selective display.
5398 An Integer N as value means display only lines
5399 that start with less than n columns of space.
5400 A value of t means that the character ^M makes itself and
5401 all the rest of the line invisible; also, when saving the buffer
5402 in a file, save the ^M as a newline. */);
5405 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5406 ¤t_buffer
->selective_display_ellipses
,
5408 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5411 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5412 doc
: /* Non-nil if self-insertion should replace existing text.
5413 The value should be one of `overwrite-mode-textual',
5414 `overwrite-mode-binary', or nil.
5415 If it is `overwrite-mode-textual', self-insertion still
5416 inserts at the end of a line, and inserts when point is before a tab,
5417 until the tab is filled in.
5418 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5420 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5422 doc
: /* Display table that controls display of the contents of current buffer.
5424 If this variable is nil, the value of `standard-display-table' is used.
5425 Each window can have its own, overriding display table, see
5426 `set-window-display-table' and `window-display-table'.
5428 The display table is a char-table created with `make-display-table'.
5429 A char-table is an array indexed by character codes. Normal array
5430 primitives `aref' and `aset' can be used to access elements of a char-table.
5432 Each of the char-table elements control how to display the corresponding
5433 text character: the element at index C in the table says how to display
5434 the character whose code is C. Each element should be a vector of
5435 characters or nil. nil means display the character in the default fashion;
5436 otherwise, the characters from the vector are delivered to the screen
5437 instead of the original character.
5439 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5440 a capital Y instead of each X character.
5442 In addition, a char-table has six extra slots to control the display of:
5444 the end of a truncated screen line (extra-slot 0, a single character);
5445 the end of a continued line (extra-slot 1, a single character);
5446 the escape character used to display character codes in octal
5447 (extra-slot 2, a single character);
5448 the character used as an arrow for control characters (extra-slot 3,
5449 a single character);
5450 the decoration indicating the presence of invisible lines (extra-slot 4,
5451 a vector of characters);
5452 the character used to draw the border between side-by-side windows
5453 (extra-slot 5, a single character).
5455 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5457 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_width
,
5459 doc
: /* *Width of left marginal area for display of a buffer.
5460 A value of nil means no marginal area. */);
5462 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_width
,
5464 doc
: /* *Width of right marginal area for display of a buffer.
5465 A value of nil means no marginal area. */);
5467 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5468 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5469 doc
: /* *Visually indicate empty lines after the buffer end.
5470 If non-nil, a bitmap is displayed in the left fringe of a window on
5471 window-systems. */);
5473 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5474 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5475 doc
: /* *If a number, scroll display up aggressively.
5476 If scrolling a window because point is below the window end, choose
5477 a new window start so that point ends up that fraction of the window's
5478 height from the bottom of the window. */);
5480 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5481 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5482 doc
: /* *If a number, scroll display down aggressively.
5483 If scrolling a window because point is above the window start, choose
5484 a new window start so that point ends up that fraction of the window's
5485 height from the top of the window. */);
5487 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5491 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5492 doc
: /* List of functions to call before each text change.
5493 Two arguments are passed to each function: the positions of
5494 the beginning and end of the range of old text to be changed.
5495 \(For an insertion, the beginning and end are at the same place.)
5496 No information is given about the length of the text after the change.
5498 Buffer changes made while executing the `before-change-functions'
5499 don't call any before-change or after-change functions.
5500 That's because these variables are temporarily set to nil.
5501 As a result, a hook function cannot straightforwardly alter the value of
5502 these variables. See the Emacs Lisp manual for a way of
5503 accomplishing an equivalent result by using other variables.
5505 If an unhandled error happens in running these functions,
5506 the variable's value remains nil. That prevents the error
5507 from happening repeatedly and making Emacs nonfunctional. */);
5508 Vbefore_change_functions
= Qnil
;
5510 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5511 doc
: /* List of functions to call after each text change.
5512 Three arguments are passed to each function: the positions of
5513 the beginning and end of the range of changed text,
5514 and the length in bytes of the pre-change text replaced by that range.
5515 \(For an insertion, the pre-change length is zero;
5516 for a deletion, that length is the number of bytes deleted,
5517 and the post-change beginning and end are at the same place.)
5519 Buffer changes made while executing the `after-change-functions'
5520 don't call any before-change or after-change functions.
5521 That's because these variables are temporarily set to nil.
5522 As a result, a hook function cannot straightforwardly alter the value of
5523 these variables. See the Emacs Lisp manual for a way of
5524 accomplishing an equivalent result by using other variables.
5526 If an unhandled error happens in running these functions,
5527 the variable's value remains nil. That prevents the error
5528 from happening repeatedly and making Emacs nonfunctional. */);
5529 Vafter_change_functions
= Qnil
;
5531 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5532 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5533 The functions are run using the `run-hooks' function. */);
5534 Vfirst_change_hook
= Qnil
;
5536 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5537 doc
: /* List of undo entries in current buffer.
5538 Recent changes come first; older changes follow newer.
5540 An entry (BEG . END) represents an insertion which begins at
5541 position BEG and ends at position END.
5543 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5544 from (abs POSITION). If POSITION is positive, point was at the front
5545 of the text being deleted; if negative, point was at the end.
5547 An entry (t HIGH . LOW) indicates that the buffer previously had
5548 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5549 of the visited file's modification time, as of that time. If the
5550 modification time of the most recent save is different, this entry is
5553 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5554 was modified between BEG and END. PROPERTY is the property name,
5555 and VALUE is the old value.
5557 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5558 was adjusted in position by the offset DISTANCE (an integer).
5560 An entry of the form POSITION indicates that point was at the buffer
5561 location given by the integer. Undoing an entry of this form places
5564 nil marks undo boundaries. The undo command treats the changes
5565 between two undo boundaries as a single step to be undone.
5567 If the value of the variable is t, undo information is not recorded. */);
5569 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5570 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5572 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5573 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5575 Normally, the line-motion functions work by scanning the buffer for
5576 newlines. Columnar operations (like move-to-column and
5577 compute-motion) also work by scanning the buffer, summing character
5578 widths as they go. This works well for ordinary text, but if the
5579 buffer's lines are very long (say, more than 500 characters), these
5580 motion functions will take longer to execute. Emacs may also take
5581 longer to update the display.
5583 If cache-long-line-scans is non-nil, these motion functions cache the
5584 results of their scans, and consult the cache to avoid rescanning
5585 regions of the buffer until the text is modified. The caches are most
5586 beneficial when they prevent the most searching---that is, when the
5587 buffer contains long lines and large regions of characters with the
5588 same, fixed screen width.
5590 When cache-long-line-scans is non-nil, processing short lines will
5591 become slightly slower (because of the overhead of consulting the
5592 cache), and the caches will use memory roughly proportional to the
5593 number of newlines and characters whose screen width varies.
5595 The caches require no explicit maintenance; their accuracy is
5596 maintained internally by the Emacs primitives. Enabling or disabling
5597 the cache should not affect the behavior of any of the motion
5598 functions; it should only affect their performance. */);
5600 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5601 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5603 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5604 doc
: /* List of formats to use when saving this buffer.
5605 Formats are defined by `format-alist'. This variable is
5606 set when a file is visited. Automatically local in all buffers. */);
5608 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5609 ¤t_buffer
->invisibility_spec
, Qnil
,
5610 doc
: /* Invisibility spec of this buffer.
5611 The default is t, which means that text is invisible
5612 if it has a non-nil `invisible' property.
5613 If the value is a list, a text character is invisible if its `invisible'
5614 property is an element in that list.
5615 If an element is a cons cell of the form (PROP . ELLIPSIS),
5616 then characters with property value PROP are invisible,
5617 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5619 DEFVAR_PER_BUFFER ("buffer-display-count",
5620 ¤t_buffer
->display_count
, Qnil
,
5621 doc
: /* A number incremented each time this buffer is displayed in a window.
5622 The function `set-window-buffer' increments it. */);
5624 DEFVAR_PER_BUFFER ("buffer-display-time",
5625 ¤t_buffer
->display_time
, Qnil
,
5626 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5627 The function `set-window-buffer' updates this variable
5628 to the value obtained by calling `current-time'.
5629 If the buffer has never been shown in a window, the value is nil. */);
5631 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5632 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5633 Non-nil also enables highlighting of the region whenever the mark is active.
5634 The variable `highlight-nonselected-windows' controls whether to highlight
5635 all windows or just the selected window. */);
5636 Vtransient_mark_mode
= Qnil
;
5638 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5639 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5640 If the value is t, disregard `buffer-read-only' and all `read-only'
5641 text properties. If the value is a list, disregard `buffer-read-only'
5642 and disregard a `read-only' text property if the property value
5643 is a member of the list. */);
5644 Vinhibit_read_only
= Qnil
;
5646 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5647 doc
: /* Cursor to use when this buffer is in the selected window.
5648 Values are interpreted as follows:
5650 t use the cursor specified for the frame
5651 nil don't display a cursor
5652 bar display a bar cursor with default width
5653 (bar . WIDTH) display a bar cursor with width WIDTH
5654 ANYTHING ELSE display a box cursor.
5656 When the buffer is displayed in a nonselected window,
5657 this variable has no effect; the cursor appears as a hollow box. */);
5659 DEFVAR_PER_BUFFER ("line-spacing",
5660 ¤t_buffer
->extra_line_spacing
, Qnil
,
5661 doc
: /* Additional space to put between lines when displaying a buffer.
5662 The space is measured in pixels, and put below lines on window systems. */);
5664 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5665 doc
: /* List of functions called with no args to query before killing a buffer. */);
5666 Vkill_buffer_query_functions
= Qnil
;
5668 defsubr (&Sbuffer_live_p
);
5669 defsubr (&Sbuffer_list
);
5670 defsubr (&Sget_buffer
);
5671 defsubr (&Sget_file_buffer
);
5672 defsubr (&Sget_buffer_create
);
5673 defsubr (&Smake_indirect_buffer
);
5674 defsubr (&Sgenerate_new_buffer_name
);
5675 defsubr (&Sbuffer_name
);
5676 /*defsubr (&Sbuffer_number);*/
5677 defsubr (&Sbuffer_file_name
);
5678 defsubr (&Sbuffer_base_buffer
);
5679 defsubr (&Sbuffer_local_value
);
5680 defsubr (&Sbuffer_local_variables
);
5681 defsubr (&Sbuffer_modified_p
);
5682 defsubr (&Sset_buffer_modified_p
);
5683 defsubr (&Sbuffer_modified_tick
);
5684 defsubr (&Srename_buffer
);
5685 defsubr (&Sother_buffer
);
5686 defsubr (&Sbuffer_disable_undo
);
5687 defsubr (&Sbuffer_enable_undo
);
5688 defsubr (&Skill_buffer
);
5689 defsubr (&Sset_buffer_major_mode
);
5690 defsubr (&Sswitch_to_buffer
);
5691 defsubr (&Spop_to_buffer
);
5692 defsubr (&Scurrent_buffer
);
5693 defsubr (&Sset_buffer
);
5694 defsubr (&Sbarf_if_buffer_read_only
);
5695 defsubr (&Sbury_buffer
);
5696 defsubr (&Serase_buffer
);
5697 defsubr (&Sset_buffer_multibyte
);
5698 defsubr (&Skill_all_local_variables
);
5700 defsubr (&Soverlayp
);
5701 defsubr (&Smake_overlay
);
5702 defsubr (&Sdelete_overlay
);
5703 defsubr (&Smove_overlay
);
5704 defsubr (&Soverlay_start
);
5705 defsubr (&Soverlay_end
);
5706 defsubr (&Soverlay_buffer
);
5707 defsubr (&Soverlay_properties
);
5708 defsubr (&Soverlays_at
);
5709 defsubr (&Soverlays_in
);
5710 defsubr (&Snext_overlay_change
);
5711 defsubr (&Sprevious_overlay_change
);
5712 defsubr (&Soverlay_recenter
);
5713 defsubr (&Soverlay_lists
);
5714 defsubr (&Soverlay_get
);
5715 defsubr (&Soverlay_put
);
5716 defsubr (&Srestore_buffer_modified_p
);
5722 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
5723 initial_define_key (control_x_map
, 'k', "kill-buffer");
5725 /* This must not be in syms_of_buffer, because Qdisabled is not
5726 initialized when that function gets called. */
5727 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);