1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000, 2001
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 */
42 #define DOC_STRINGS_IN_COMMENTS
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 /* 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 /* 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
);
223 CHECK_FRAME (frame
, 1);
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 /* 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
;
270 CHECK_STRING (name
, 0);
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 /* 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
, 0);
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 /* 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 /* 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
;
651 /* Reset buffer B's local variables info.
652 Don't use this on a buffer that has already been in use;
653 it does not treat permanent locals consistently.
654 Instead, use Fkill_all_local_variables.
656 If PERMANENT_TOO is 1, then we reset permanent built-in
657 buffer-local variables. If PERMANENT_TOO is 0,
658 we preserve those. */
661 reset_buffer_local_variables (b
, permanent_too
)
662 register struct buffer
*b
;
668 /* Reset the major mode to Fundamental, together with all the
669 things that depend on the major mode.
670 default-major-mode is handled at a higher level.
671 We ignore it here. */
672 b
->major_mode
= Qfundamental_mode
;
674 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
675 b
->mode_name
= QSFundamental
;
676 b
->minor_modes
= Qnil
;
678 /* If the standard case table has been altered and invalidated,
679 fix up its insides first. */
680 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
681 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
682 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
683 Fset_standard_case_table (Vascii_downcase_table
);
685 b
->downcase_table
= Vascii_downcase_table
;
686 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
687 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
688 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
689 b
->invisibility_spec
= Qt
;
691 b
->buffer_file_type
= Qnil
;
695 b
->sort_table
= XSTRING (Vascii_sort_table
);
696 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
699 /* Reset all (or most) per-buffer variables to their defaults. */
700 b
->local_var_alist
= Qnil
;
701 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
702 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
703 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
705 /* For each slot that has a default value,
706 copy that into the slot. */
708 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
710 offset
+= sizeof (Lisp_Object
))
712 int idx
= PER_BUFFER_IDX (offset
);
715 || buffer_permanent_local_flags
[idx
] == 0))
716 /* Is -2 used anywhere? */
718 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
722 /* We split this away from generate-new-buffer, because rename-buffer
723 and set-visited-file-name ought to be able to use this to really
724 rename the buffer properly. */
726 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
728 /* Return a string that is the name of no existing buffer based on NAME.
729 If there is no live buffer named NAME, then return NAME.
730 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
731 until an unused name is found, and then return that name.
732 Optional second argument IGNORE specifies a name that is okay to use
733 \(if it is in the sequence to be tried)
734 even if a buffer with that name exists. */
736 register Lisp_Object name
, ignore
;
738 register Lisp_Object gentemp
, tem
;
742 CHECK_STRING (name
, 0);
744 tem
= Fget_buffer (name
);
751 sprintf (number
, "<%d>", ++count
);
752 gentemp
= concat2 (name
, build_string (number
));
753 tem
= Fstring_equal (gentemp
, ignore
);
756 tem
= Fget_buffer (gentemp
);
763 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
764 /* Return the name of BUFFER, as a string.
765 With no argument or nil as argument, return the name of the current buffer. */
767 register Lisp_Object buffer
;
770 return current_buffer
->name
;
771 CHECK_BUFFER (buffer
, 0);
772 return XBUFFER (buffer
)->name
;
775 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
776 /* Return name of file BUFFER is visiting, or nil if none.
777 No argument or nil as argument means use the current buffer. */
779 register Lisp_Object buffer
;
782 return current_buffer
->filename
;
783 CHECK_BUFFER (buffer
, 0);
784 return XBUFFER (buffer
)->filename
;
787 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
789 /* Return the base buffer of indirect buffer BUFFER.
790 If BUFFER is not indirect, return nil. */
792 register Lisp_Object buffer
;
795 Lisp_Object base_buffer
;
798 base
= current_buffer
->base_buffer
;
801 CHECK_BUFFER (buffer
, 0);
802 base
= XBUFFER (buffer
)->base_buffer
;
807 XSETBUFFER (base_buffer
, base
);
811 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
812 Sbuffer_local_variables
, 0, 1, 0,
813 /* Return an alist of variables that are buffer-local in BUFFER.
814 Most elements look like (SYMBOL . VALUE), describing one variable.
815 For a symbol that is locally unbound, just the symbol appears in the value.
816 Note that storing new VALUEs in these elements doesn't change the variables.
817 No argument or nil as argument means use current buffer as BUFFER. */
819 register Lisp_Object buffer
;
821 register struct buffer
*buf
;
822 register Lisp_Object result
;
825 buf
= current_buffer
;
828 CHECK_BUFFER (buffer
, 0);
829 buf
= XBUFFER (buffer
);
835 register Lisp_Object tail
;
836 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
838 Lisp_Object val
, elt
;
842 /* Reference each variable in the alist in buf.
843 If inquiring about the current buffer, this gets the current values,
844 so store them into the alist so the alist is up to date.
845 If inquiring about some other buffer, this swaps out any values
846 for that buffer, making the alist up to date automatically. */
847 val
= find_symbol_value (XCAR (elt
));
848 /* Use the current buffer value only if buf is the current buffer. */
849 if (buf
!= current_buffer
)
852 /* If symbol is unbound, put just the symbol in the list. */
853 if (EQ (val
, Qunbound
))
854 result
= Fcons (XCAR (elt
), result
);
855 /* Otherwise, put (symbol . value) in the list. */
857 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
861 /* Add on all the variables stored in special slots. */
865 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
866 offset
< sizeof (struct buffer
);
867 /* sizeof EMACS_INT == sizeof Lisp_Object */
868 offset
+= (sizeof (EMACS_INT
)))
870 idx
= PER_BUFFER_IDX (offset
);
871 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
872 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
873 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
874 PER_BUFFER_VALUE (buf
, offset
)),
883 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
885 /* Return t if BUFFER was modified since its file was last read or saved.
886 No argument or nil as argument means use current buffer as BUFFER. */
888 register Lisp_Object buffer
;
890 register struct buffer
*buf
;
892 buf
= current_buffer
;
895 CHECK_BUFFER (buffer
, 0);
896 buf
= XBUFFER (buffer
);
899 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
902 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
904 /* Mark current buffer as modified or unmodified according to FLAG.
905 A non-nil FLAG means mark the buffer modified. */
907 register Lisp_Object flag
;
909 register int already
;
910 register Lisp_Object fn
;
911 Lisp_Object buffer
, window
;
913 #ifdef CLASH_DETECTION
914 /* If buffer becoming modified, lock the file.
915 If buffer becoming unmodified, unlock the file. */
917 fn
= current_buffer
->file_truename
;
918 /* Test buffer-file-name so that binding it to nil is effective. */
919 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
921 already
= SAVE_MODIFF
< MODIFF
;
922 if (!already
&& !NILP (flag
))
924 else if (already
&& NILP (flag
))
927 #endif /* CLASH_DETECTION */
929 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
931 /* Set update_mode_lines only if buffer is displayed in some window.
932 Packages like jit-lock or lazy-lock preserve a buffer's modified
933 state by recording/restoring the state around blocks of code.
934 Setting update_mode_lines makes redisplay consider all windows
935 (on all frames). Stealth fontification of buffers not displayed
936 would incur additional redisplay costs if we'd set
937 update_modes_lines unconditionally.
939 Ideally, I think there should be another mechanism for fontifying
940 buffers without "modifying" buffers, or redisplay should be
941 smarter about updating the `*' in mode lines. --gerd */
942 XSETBUFFER (buffer
, current_buffer
);
943 window
= Fget_buffer_window (buffer
, Qt
);
944 if (WINDOWP (window
))
947 current_buffer
->prevent_redisplay_optimizations_p
= 1;
953 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
954 Srestore_buffer_modified_p
, 1, 1, 0,
955 /* Like `set-buffer-modified-p', with a differences concerning redisplay.
956 It is not ensured that mode lines will be updated to show the modified
957 state of the current buffer. Use with care. */
961 #ifdef CLASH_DETECTION
964 /* If buffer becoming modified, lock the file.
965 If buffer becoming unmodified, unlock the file. */
967 fn
= current_buffer
->file_truename
;
968 /* Test buffer-file-name so that binding it to nil is effective. */
969 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
971 int already
= SAVE_MODIFF
< MODIFF
;
972 if (!already
&& !NILP (flag
))
974 else if (already
&& NILP (flag
))
977 #endif /* CLASH_DETECTION */
979 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
983 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
985 /* Return BUFFER's tick counter, incremented for each change in text.
986 Each buffer has a tick counter which is incremented each time the text in
987 that buffer is changed. It wraps around occasionally.
988 No argument or nil as argument means use current buffer as BUFFER. */
990 register Lisp_Object buffer
;
992 register struct buffer
*buf
;
994 buf
= current_buffer
;
997 CHECK_BUFFER (buffer
, 0);
998 buf
= XBUFFER (buffer
);
1001 return make_number (BUF_MODIFF (buf
));
1004 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1005 "sRename buffer (to new name): \nP",
1006 /* Change current buffer's name to NEWNAME (a string).
1007 If second arg UNIQUE is nil or omitted, it is an error if a
1008 buffer named NEWNAME already exists.
1009 If UNIQUE is non-nil, come up with a new name using
1010 `generate-new-buffer-name'.
1011 Interactively, you can set UNIQUE with a prefix argument.
1012 We return the name we actually gave the buffer.
1013 This does not change the name of the visited file (if any). */
1015 register Lisp_Object newname
, unique
;
1017 register Lisp_Object tem
, buf
;
1019 CHECK_STRING (newname
, 0);
1021 if (XSTRING (newname
)->size
== 0)
1022 error ("Empty string is invalid as a buffer name");
1024 tem
= Fget_buffer (newname
);
1027 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1028 rename the buffer automatically so you can create another
1029 with the original name. It makes UNIQUE equivalent to
1030 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1031 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1032 return current_buffer
->name
;
1034 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1036 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
1039 current_buffer
->name
= newname
;
1041 /* Catch redisplay's attention. Unless we do this, the mode lines for
1042 any windows displaying current_buffer will stay unchanged. */
1043 update_mode_lines
++;
1045 XSETBUFFER (buf
, current_buffer
);
1046 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1047 if (NILP (current_buffer
->filename
)
1048 && !NILP (current_buffer
->auto_save_file_name
))
1049 call0 (intern ("rename-auto-save-file"));
1050 /* Refetch since that last call may have done GC. */
1051 return current_buffer
->name
;
1054 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1055 /* Return most recently selected buffer other than BUFFER.
1056 Buffers not visible in windows are preferred to visible buffers,
1057 unless optional second argument VISIBLE-OK is non-nil.
1058 If the optional third argument FRAME is non-nil, use that frame's
1059 buffer list instead of the selected frame's buffer list.
1060 If no other buffer exists, the buffer `*scratch*' is returned.
1061 If BUFFER is omitted or nil, some interesting buffer is returned. */
1062 (buffer
, visible_ok
, frame
))
1063 register Lisp_Object buffer
, visible_ok
, frame
;
1065 Lisp_Object
Fset_buffer_major_mode ();
1066 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1070 frame
= selected_frame
;
1072 tail
= Vbuffer_alist
;
1073 pred
= frame_buffer_predicate (frame
);
1075 /* Consider buffers that have been seen in the selected frame
1076 before other buffers. */
1078 tem
= frame_buffer_list (frame
);
1082 if (BUFFERP (XCAR (tem
)))
1083 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1086 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1088 for (; !NILP (tail
); tail
= Fcdr (tail
))
1090 buf
= Fcdr (Fcar (tail
));
1091 if (EQ (buf
, buffer
))
1093 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
1095 /* If the selected frame has a buffer_predicate,
1096 disregard buffers that don't fit the predicate. */
1099 tem
= call1 (pred
, buf
);
1104 if (NILP (visible_ok
))
1105 tem
= Fget_buffer_window (buf
, Qvisible
);
1110 if (NILP (notsogood
))
1113 if (!NILP (notsogood
))
1115 buf
= Fget_buffer (build_string ("*scratch*"));
1118 buf
= Fget_buffer_create (build_string ("*scratch*"));
1119 Fset_buffer_major_mode (buf
);
1124 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
1126 /* Make BUFFER stop keeping undo information.
1127 No argument or nil as argument means do this for the current buffer. */
1129 register Lisp_Object buffer
;
1131 Lisp_Object real_buffer
;
1134 XSETBUFFER (real_buffer
, current_buffer
);
1137 real_buffer
= Fget_buffer (buffer
);
1138 if (NILP (real_buffer
))
1142 XBUFFER (real_buffer
)->undo_list
= Qt
;
1147 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1149 /* Start keeping undo information for buffer BUFFER.
1150 No argument or nil as argument means do this for the current buffer. */
1152 register Lisp_Object buffer
;
1154 Lisp_Object real_buffer
;
1157 XSETBUFFER (real_buffer
, current_buffer
);
1160 real_buffer
= Fget_buffer (buffer
);
1161 if (NILP (real_buffer
))
1165 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1166 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1172 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1173 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1174 The buffer being killed will be current while the hook is running.\n\
1177 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1178 /* Kill the buffer BUFFER.
1179 The argument may be a buffer or may be the name of a buffer.
1180 An argument of nil means kill the current buffer.
1182 Value is t if the buffer is actually killed, nil if user says no.
1184 The value of `kill-buffer-hook' (which may be local to that buffer),
1185 if not void, is a list of functions to be called, with no arguments,
1186 before the buffer is actually killed. The buffer to be killed is current
1187 when the hook functions are called.
1189 Any processes that have this buffer as the `process-buffer' are killed
1195 register struct buffer
*b
;
1196 register Lisp_Object tem
;
1197 register struct Lisp_Marker
*m
;
1198 struct gcpro gcpro1
;
1201 buf
= Fcurrent_buffer ();
1203 buf
= Fget_buffer (buffer
);
1209 /* Avoid trouble for buffer already dead. */
1213 /* Query if the buffer is still modified. */
1214 if (INTERACTIVE
&& !NILP (b
->filename
)
1215 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1218 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
1219 XSTRING (b
->name
)->data
));
1225 /* Run hooks with the buffer to be killed the current buffer. */
1227 int count
= specpdl_ptr
- specpdl
;
1230 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1231 set_buffer_internal (b
);
1233 /* First run the query functions; if any query is answered no,
1234 don't kill the buffer. */
1235 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
1237 tem
= call0 (Fcar (list
));
1239 return unbind_to (count
, Qnil
);
1242 /* Then run the hooks. */
1243 if (!NILP (Vrun_hooks
))
1244 call1 (Vrun_hooks
, Qkill_buffer_hook
);
1245 unbind_to (count
, Qnil
);
1248 /* We have no more questions to ask. Verify that it is valid
1249 to kill the buffer. This must be done after the questions
1250 since anything can happen within do_yes_or_no_p. */
1252 /* Don't kill the minibuffer now current. */
1253 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1259 /* When we kill a base buffer, kill all its indirect buffers.
1260 We do it at this stage so nothing terrible happens if they
1261 ask questions or their hooks get errors. */
1262 if (! b
->base_buffer
)
1264 struct buffer
*other
;
1268 for (other
= all_buffers
; other
; other
= other
->next
)
1269 /* all_buffers contains dead buffers too;
1270 don't re-kill them. */
1271 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1274 XSETBUFFER (buf
, other
);
1281 /* Make this buffer not be current.
1282 In the process, notice if this is the sole visible buffer
1283 and give up if so. */
1284 if (b
== current_buffer
)
1286 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1288 if (b
== current_buffer
)
1292 /* Notice if the buffer to kill is the sole visible buffer
1293 when we're currently in the mini-buffer, and give up if so. */
1294 XSETBUFFER (tem
, current_buffer
);
1295 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1297 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1302 /* Now there is no question: we can kill the buffer. */
1304 #ifdef CLASH_DETECTION
1305 /* Unlock this buffer's file, if it is locked. */
1307 #endif /* CLASH_DETECTION */
1309 kill_buffer_processes (buf
);
1311 tem
= Vinhibit_quit
;
1313 replace_buffer_in_all_windows (buf
);
1314 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1315 frames_discard_buffer (buf
);
1316 Vinhibit_quit
= tem
;
1318 /* Delete any auto-save file, if we saved it in this session. */
1319 if (STRINGP (b
->auto_save_file_name
)
1320 && b
->auto_save_modified
!= 0
1321 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
)
1324 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1326 internal_delete_file (b
->auto_save_file_name
);
1331 /* Unchain all markers that belong to this indirect buffer.
1332 Don't unchain the markers that belong to the base buffer
1333 or its other indirect buffers. */
1334 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1340 unchain_marker (tem
);
1346 /* Unchain all markers of this buffer and its indirect buffers.
1347 and leave them pointing nowhere. */
1348 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1355 BUF_MARKERS (b
) = Qnil
;
1356 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1358 /* Perhaps we should explicitly free the interval tree here... */
1361 /* Reset the local variables, so that this buffer's local values
1362 won't be protected from GC. They would be protected
1363 if they happened to remain encached in their symbols.
1364 This gets rid of them for certain. */
1365 swap_out_buffer_local_variables (b
);
1366 reset_buffer_local_variables (b
, 1);
1371 if (! b
->base_buffer
)
1372 free_buffer_text (b
);
1374 if (b
->newline_cache
)
1376 free_region_cache (b
->newline_cache
);
1377 b
->newline_cache
= 0;
1379 if (b
->width_run_cache
)
1381 free_region_cache (b
->width_run_cache
);
1382 b
->width_run_cache
= 0;
1384 b
->width_table
= Qnil
;
1386 b
->undo_list
= Qnil
;
1391 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1392 we do this each time BUF is selected visibly, the more recently
1393 selected buffers are always closer to the front of the list. This
1394 means that other_buffer is more likely to choose a relevant buffer. */
1400 register Lisp_Object link
, prev
;
1402 frame
= selected_frame
;
1405 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1407 if (EQ (XCDR (XCAR (link
)), buf
))
1412 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1413 we cannot use Fdelq itself here because it allows quitting. */
1416 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1418 XCDR (prev
) = XCDR (XCDR (prev
));
1420 XCDR (link
) = Vbuffer_alist
;
1421 Vbuffer_alist
= link
;
1423 /* Now move this buffer to the front of frame_buffer_list also. */
1426 for (link
= frame_buffer_list (frame
); CONSP (link
);
1429 if (EQ (XCAR (link
), buf
))
1434 /* Effectively do delq. */
1439 set_frame_buffer_list (frame
,
1440 XCDR (frame_buffer_list (frame
)));
1442 XCDR (prev
) = XCDR (XCDR (prev
));
1444 XCDR (link
) = frame_buffer_list (frame
);
1445 set_frame_buffer_list (frame
, link
);
1448 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1451 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1452 /* Set an appropriate major mode for BUFFER, according to `default-major-mode'.
1453 Use this function before selecting the buffer, since it may need to inspect
1454 the current buffer's major mode. */
1459 Lisp_Object function
;
1461 function
= buffer_defaults
.major_mode
;
1462 if (NILP (function
) && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1463 function
= current_buffer
->major_mode
;
1465 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1468 count
= specpdl_ptr
- specpdl
;
1470 /* To select a nonfundamental mode,
1471 select the buffer temporarily and then call the mode function. */
1473 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1475 Fset_buffer (buffer
);
1478 return unbind_to (count
, Qnil
);
1481 /* If switching buffers in WINDOW would be an error, return
1482 a C string saying what the error would be. */
1485 no_switch_window (window
)
1489 if (EQ (minibuf_window
, window
))
1490 return "Cannot switch buffers in minibuffer window";
1491 tem
= Fwindow_dedicated_p (window
);
1493 return "Cannot switch buffers in a dedicated window";
1497 /* Switch to buffer BUFFER in the selected window.
1498 If NORECORD is non-nil, don't call record_buffer. */
1501 switch_to_buffer_1 (buffer
, norecord
)
1502 Lisp_Object buffer
, norecord
;
1504 register Lisp_Object buf
;
1507 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1510 buf
= Fget_buffer (buffer
);
1513 buf
= Fget_buffer_create (buffer
);
1514 Fset_buffer_major_mode (buf
);
1518 if (NILP (norecord
))
1519 record_buffer (buf
);
1521 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1522 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1529 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1530 /* Select buffer BUFFER in the current window.
1531 BUFFER may be a buffer or a buffer name.
1532 Optional second arg NORECORD non-nil means
1533 do not put this buffer at the front of the list of recently selected ones.
1535 WARNING: This is NOT the way to work on another buffer temporarily
1536 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1537 the window-buffer correspondences. */
1539 Lisp_Object buffer
, norecord
;
1543 err
= no_switch_window (selected_window
);
1544 if (err
) error (err
);
1546 return switch_to_buffer_1 (buffer
, norecord
);
1549 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1550 /* Select buffer BUFFER in some window, preferably a different one.
1551 If BUFFER is nil, then some other buffer is chosen.
1552 If `pop-up-windows' is non-nil, windows can be split to do this.
1553 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1554 window even if BUFFER is already visible in the selected window.
1555 This uses the function `display-buffer' as a subroutine; see the documentation
1556 of `display-buffer' for additional customization information.
1558 Optional third arg NORECORD non-nil means
1559 do not put this buffer at the front of the list of recently selected ones. */
1560 (buffer
, other_window
, norecord
))
1561 Lisp_Object buffer
, other_window
, norecord
;
1563 register Lisp_Object buf
;
1565 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1568 buf
= Fget_buffer (buffer
);
1571 buf
= Fget_buffer_create (buffer
);
1572 Fset_buffer_major_mode (buf
);
1576 if (NILP (norecord
))
1577 /* This seems bogus since Fselect_window will call record_buffer anyway. */
1578 record_buffer (buf
);
1579 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1583 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1584 /* Return the current buffer as a Lisp object. */
1587 register Lisp_Object buf
;
1588 XSETBUFFER (buf
, current_buffer
);
1592 /* Set the current buffer to B.
1594 We previously set windows_or_buffers_changed here to invalidate
1595 global unchanged information in beg_unchanged and end_unchanged.
1596 This is no longer necessary because we now compute unchanged
1597 information on a buffer-basis. Every action affecting other
1598 windows than the selected one requires a select_window at some
1599 time, and that increments windows_or_buffers_changed. */
1602 set_buffer_internal (b
)
1603 register struct buffer
*b
;
1605 if (current_buffer
!= b
)
1606 set_buffer_internal_1 (b
);
1609 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1610 This is used by redisplay. */
1613 set_buffer_internal_1 (b
)
1614 register struct buffer
*b
;
1616 register struct buffer
*old_buf
;
1617 register Lisp_Object tail
, valcontents
;
1620 #ifdef USE_MMAP_FOR_BUFFERS
1621 if (b
->text
->beg
== NULL
)
1622 enlarge_buffer_text (b
, 0);
1623 #endif /* USE_MMAP_FOR_BUFFERS */
1625 if (current_buffer
== b
)
1628 old_buf
= current_buffer
;
1630 last_known_column_point
= -1; /* invalidate indentation cache */
1634 /* Put the undo list back in the base buffer, so that it appears
1635 that an indirect buffer shares the undo list of its base. */
1636 if (old_buf
->base_buffer
)
1637 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1639 /* If the old current buffer has markers to record PT, BEGV and ZV
1640 when it is not current, update them now. */
1641 if (! NILP (old_buf
->pt_marker
))
1644 XSETBUFFER (obuf
, old_buf
);
1645 set_marker_both (old_buf
->pt_marker
, obuf
,
1646 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1648 if (! NILP (old_buf
->begv_marker
))
1651 XSETBUFFER (obuf
, old_buf
);
1652 set_marker_both (old_buf
->begv_marker
, obuf
,
1653 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1655 if (! NILP (old_buf
->zv_marker
))
1658 XSETBUFFER (obuf
, old_buf
);
1659 set_marker_both (old_buf
->zv_marker
, obuf
,
1660 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1664 /* Get the undo list from the base buffer, so that it appears
1665 that an indirect buffer shares the undo list of its base. */
1667 b
->undo_list
= b
->base_buffer
->undo_list
;
1669 /* If the new current buffer has markers to record PT, BEGV and ZV
1670 when it is not current, fetch them now. */
1671 if (! NILP (b
->pt_marker
))
1673 BUF_PT (b
) = marker_position (b
->pt_marker
);
1674 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1676 if (! NILP (b
->begv_marker
))
1678 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1679 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1681 if (! NILP (b
->zv_marker
))
1683 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1684 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1687 /* Look down buffer's list of local Lisp variables
1688 to find and update any that forward into C variables. */
1690 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1692 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1693 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1694 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1695 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1696 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1697 /* Just reference the variable
1698 to cause it to become set for this buffer. */
1699 Fsymbol_value (XCAR (XCAR (tail
)));
1702 /* Do the same with any others that were local to the previous buffer */
1705 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1707 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1708 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1709 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1710 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1711 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1712 /* Just reference the variable
1713 to cause it to become set for this buffer. */
1714 Fsymbol_value (XCAR (XCAR (tail
)));
1718 /* Switch to buffer B temporarily for redisplay purposes.
1719 This avoids certain things that don't need to be done within redisplay. */
1725 register struct buffer
*old_buf
;
1727 if (current_buffer
== b
)
1730 old_buf
= current_buffer
;
1735 /* If the old current buffer has markers to record PT, BEGV and ZV
1736 when it is not current, update them now. */
1737 if (! NILP (old_buf
->pt_marker
))
1740 XSETBUFFER (obuf
, old_buf
);
1741 set_marker_both (old_buf
->pt_marker
, obuf
,
1742 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1744 if (! NILP (old_buf
->begv_marker
))
1747 XSETBUFFER (obuf
, old_buf
);
1748 set_marker_both (old_buf
->begv_marker
, obuf
,
1749 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1751 if (! NILP (old_buf
->zv_marker
))
1754 XSETBUFFER (obuf
, old_buf
);
1755 set_marker_both (old_buf
->zv_marker
, obuf
,
1756 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1760 /* If the new current buffer has markers to record PT, BEGV and ZV
1761 when it is not current, fetch them now. */
1762 if (! NILP (b
->pt_marker
))
1764 BUF_PT (b
) = marker_position (b
->pt_marker
);
1765 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1767 if (! NILP (b
->begv_marker
))
1769 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1770 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1772 if (! NILP (b
->zv_marker
))
1774 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1775 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1779 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1780 /* Make the buffer BUFFER current for editing operations.
1781 BUFFER may be a buffer or the name of an existing buffer.
1782 See also `save-excursion' when you want to make a buffer current temporarily.
1783 This function does not display the buffer, so its effect ends
1784 when the current command terminates.
1785 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */
1787 register Lisp_Object buffer
;
1789 register Lisp_Object buf
;
1790 buf
= Fget_buffer (buffer
);
1793 if (NILP (XBUFFER (buf
)->name
))
1794 error ("Selecting deleted buffer");
1795 set_buffer_internal (XBUFFER (buf
));
1799 /* Set the current buffer to BUFFER provided it is alive. */
1802 set_buffer_if_live (buffer
)
1805 if (! NILP (XBUFFER (buffer
)->name
))
1806 Fset_buffer (buffer
);
1810 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1811 Sbarf_if_buffer_read_only
, 0, 0, 0,
1812 /* Signal a `buffer-read-only' error if the current buffer is read-only. */
1815 if (!NILP (current_buffer
->read_only
)
1816 && NILP (Vinhibit_read_only
))
1817 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1821 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1822 /* Put BUFFER at the end of the list of all buffers.
1823 There it is the least likely candidate for `other-buffer' to return;
1824 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1825 If BUFFER is nil or omitted, bury the current buffer.
1826 Also, if BUFFER is nil or omitted, remove the current buffer from the
1827 selected window if it is displayed there. */
1829 register Lisp_Object buffer
;
1831 /* Figure out what buffer we're going to bury. */
1835 XSETBUFFER (buffer
, current_buffer
);
1837 tem
= Fwindow_buffer (selected_window
);
1838 /* If we're burying the current buffer, unshow it. */
1839 if (EQ (buffer
, tem
))
1840 if (NILP (Fwindow_dedicated_p (selected_window
)))
1841 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1842 else if (NILP (XWINDOW (selected_window
)->parent
))
1843 Ficonify_frame (Fwindow_frame (selected_window
));
1845 Fdelete_window (selected_window
);
1851 buf1
= Fget_buffer (buffer
);
1857 /* Move buffer to the end of the buffer list. Do nothing if the
1858 buffer is killed. */
1859 if (!NILP (XBUFFER (buffer
)->name
))
1861 Lisp_Object aelt
, link
;
1863 aelt
= Frassq (buffer
, Vbuffer_alist
);
1864 link
= Fmemq (aelt
, Vbuffer_alist
);
1865 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1867 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1869 frames_bury_buffer (buffer
);
1875 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1876 /* Delete the entire contents of the current buffer.
1877 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1878 so the buffer is truly empty after this. */
1885 current_buffer
->last_window_start
= 1;
1886 /* Prevent warnings, or suspension of auto saving, that would happen
1887 if future size is less than past size. Use of erase-buffer
1888 implies that the future text is not really related to the past text. */
1889 XSETFASTINT (current_buffer
->save_length
, 0);
1894 validate_region (b
, e
)
1895 register Lisp_Object
*b
, *e
;
1897 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1898 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1900 if (XINT (*b
) > XINT (*e
))
1903 tem
= *b
; *b
= *e
; *e
= tem
;
1906 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1907 && XINT (*e
) <= ZV
))
1908 args_out_of_range (*b
, *e
);
1911 /* Advance BYTE_POS up to a character boundary
1912 and return the adjusted position. */
1915 advance_to_char_boundary (byte_pos
)
1920 if (byte_pos
== BEG
)
1921 /* Beginning of buffer is always a character boundary. */
1924 c
= FETCH_BYTE (byte_pos
);
1925 if (! CHAR_HEAD_P (c
))
1927 /* We should advance BYTE_POS only when C is a constituent of a
1928 multibyte sequence. */
1929 int orig_byte_pos
= byte_pos
;
1934 c
= FETCH_BYTE (byte_pos
);
1936 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
1938 if (byte_pos
< orig_byte_pos
)
1939 byte_pos
= orig_byte_pos
;
1940 /* If C is a constituent of a multibyte sequence, BYTE_POS was
1941 surely advance to the correct character boundary. If C is
1942 not, BYTE_POS was unchanged. */
1948 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
1950 /* Set the multibyte flag of the current buffer to FLAG.
1951 If FLAG is t, this makes the buffer a multibyte buffer.
1952 If FLAG is nil, this makes the buffer a single-byte buffer.
1953 The buffer contents remain unchanged as a sequence of bytes
1954 but the contents viewed as characters do change. */
1958 Lisp_Object tail
, markers
;
1959 struct buffer
*other
;
1960 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
1961 int begv
= BEGV
, zv
= ZV
;
1962 int narrowed
= (BEG
!= begv
|| Z
!= zv
);
1963 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
1965 if (current_buffer
->base_buffer
)
1966 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
1968 /* Do nothing if nothing actually changes. */
1969 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
1972 /* It would be better to update the list,
1973 but this is good enough for now. */
1975 current_buffer
->undo_list
= Qt
;
1977 /* If the cached position is for this buffer, clear it out. */
1978 clear_charpos_cache (current_buffer
);
1988 /* Do this first, so it can use CHAR_TO_BYTE
1989 to calculate the old correspondences. */
1990 set_intervals_multibyte (0);
1992 current_buffer
->enable_multibyte_characters
= Qnil
;
1998 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2000 tail
= BUF_MARKERS (current_buffer
);
2001 while (! NILP (tail
))
2003 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
2004 tail
= XMARKER (tail
)->chain
;
2007 /* Convert multibyte form of 8-bit characters to unibyte. */
2022 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2023 p
+= bytes
, pos
+= bytes
;
2026 c
= STRING_CHAR (p
, stop
- pos
);
2027 /* Delete all bytes for this 8-bit character but the
2028 last one, and change the last one to the charcter
2031 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2043 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2051 /* Be sure not to have a multibyte sequence striding over the GAP.
2052 Ex: We change this: "...abc\201 _GAP_ \241def..."
2053 to: "...abc _GAP_ \201\241def..." */
2055 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2056 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2058 unsigned char *p
= GPT_ADDR
- 1;
2060 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2061 if (BASE_LEADING_CODE_P (*p
))
2063 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2065 move_gap_both (new_gpt
, new_gpt
);
2069 /* Make the buffer contents valid as multibyte by converting
2070 8-bit characters to multibyte form. */
2086 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2087 p
+= bytes
, pos
+= bytes
;
2090 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2092 bytes
= CHAR_STRING (*p
, tmp
);
2094 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2096 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2097 /* Now the gap is after the just inserted data. */
2114 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2116 /* Do this first, so that chars_in_text asks the right question.
2117 set_intervals_multibyte needs it too. */
2118 current_buffer
->enable_multibyte_characters
= Qt
;
2120 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2121 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2123 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2125 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2126 if (BEGV_BYTE
> GPT_BYTE
)
2127 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2129 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2131 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2132 if (ZV_BYTE
> GPT_BYTE
)
2133 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2135 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2138 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2141 if (pt_byte
> GPT_BYTE
)
2142 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2144 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2145 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2148 tail
= markers
= BUF_MARKERS (current_buffer
);
2150 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2151 getting confused by the markers that have not yet been updated.
2152 It is also a signal that it should never create a marker. */
2153 BUF_MARKERS (current_buffer
) = Qnil
;
2155 while (! NILP (tail
))
2157 XMARKER (tail
)->bytepos
2158 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
2159 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
2161 tail
= XMARKER (tail
)->chain
;
2164 /* Make sure no markers were put on the chain
2165 while the chain value was incorrect. */
2166 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
2169 BUF_MARKERS (current_buffer
) = markers
;
2171 /* Do this last, so it can calculate the new correspondences
2172 between chars and bytes. */
2173 set_intervals_multibyte (1);
2177 current_buffer
->undo_list
= Qnil
;
2179 /* Changing the multibyteness of a buffer means that all windows
2180 showing that buffer must be updated thoroughly. */
2181 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2182 ++windows_or_buffers_changed
;
2184 /* Copy this buffer's new multibyte status
2185 into all of its indirect buffers. */
2186 for (other
= all_buffers
; other
; other
= other
->next
)
2187 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2189 other
->enable_multibyte_characters
2190 = current_buffer
->enable_multibyte_characters
;
2191 other
->prevent_redisplay_optimizations_p
= 1;
2194 /* Restore the modifiedness of the buffer. */
2195 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2196 Fset_buffer_modified_p (Qnil
);
2201 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2203 /* Switch to Fundamental mode by killing current buffer's local variables.
2204 Most local variable bindings are eliminated so that the default values
2205 become effective once more. Also, the syntax table is set from
2206 `standard-syntax-table', the local keymap is set to nil,
2207 and the abbrev table from `fundamental-mode-abbrev-table'.
2208 This function also forces redisplay of the mode line.
2210 Every function to select a new major mode starts by
2211 calling this function.
2213 As a special exception, local variables whose names have
2214 a non-nil `permanent-local' property are not eliminated by this function.
2216 The first thing this function does is run
2217 the normal hook `change-major-mode-hook'. */
2220 register Lisp_Object alist
, sym
, tem
;
2223 if (!NILP (Vrun_hooks
))
2224 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2225 oalist
= current_buffer
->local_var_alist
;
2227 /* Make sure none of the bindings in oalist
2228 remain swapped in, in their symbols. */
2230 swap_out_buffer_local_variables (current_buffer
);
2232 /* Actually eliminate all local bindings of this buffer. */
2234 reset_buffer_local_variables (current_buffer
, 0);
2236 /* Redisplay mode lines; we are changing major mode. */
2238 update_mode_lines
++;
2240 /* Any which are supposed to be permanent,
2241 make local again, with the same values they had. */
2243 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2245 sym
= XCAR (XCAR (alist
));
2246 tem
= Fget (sym
, Qpermanent_local
);
2249 Fmake_local_variable (sym
);
2250 Fset (sym
, XCDR (XCAR (alist
)));
2254 /* Force mode-line redisplay. Useful here because all major mode
2255 commands call this function. */
2256 update_mode_lines
++;
2261 /* Make sure no local variables remain set up with buffer B
2262 for their current values. */
2265 swap_out_buffer_local_variables (b
)
2268 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2270 XSETBUFFER (buffer
, b
);
2271 oalist
= b
->local_var_alist
;
2273 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2275 sym
= XCAR (XCAR (alist
));
2277 /* Need not do anything if some other buffer's binding is now encached. */
2278 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2279 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2281 /* Symbol is set up for this buffer's old local value.
2282 Set it up for the current buffer with the default value. */
2284 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2285 /* Store the symbol's current value into the alist entry
2286 it is currently set up for. This is so that, if the
2287 local is marked permanent, and we make it local again
2288 later in Fkill_all_local_variables, we don't lose the value. */
2290 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
);
2291 /* Switch to the symbol's default-value alist entry. */
2293 /* Mark it as current for buffer B. */
2294 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2295 /* Store the current value into any forwarding in the symbol. */
2296 store_symval_forwarding (sym
,
2297 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2303 /* Find all the overlays in the current buffer that contain position POS.
2304 Return the number found, and store them in a vector in *VEC_PTR.
2305 Store in *LEN_PTR the size allocated for the vector.
2306 Store in *NEXT_PTR the next position after POS where an overlay starts,
2307 or ZV if there are no more overlays.
2308 Store in *PREV_PTR the previous position before POS where an overlay ends,
2309 or where an overlay starts which ends at or after POS;
2310 or BEGV if there are no such overlays.
2311 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2313 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2314 when this function is called.
2316 If EXTEND is non-zero, we make the vector bigger if necessary.
2317 If EXTEND is zero, we never extend the vector,
2318 and we store only as many overlays as will fit.
2319 But we still return the total number of overlays.
2321 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2322 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2323 default (BEGV or ZV). */
2326 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2329 Lisp_Object
**vec_ptr
;
2335 Lisp_Object tail
, overlay
, start
, end
;
2338 Lisp_Object
*vec
= *vec_ptr
;
2341 int inhibit_storing
= 0;
2343 for (tail
= current_buffer
->overlays_before
;
2347 int startpos
, endpos
;
2349 overlay
= XCAR (tail
);
2351 start
= OVERLAY_START (overlay
);
2352 end
= OVERLAY_END (overlay
);
2353 endpos
= OVERLAY_POSITION (end
);
2360 startpos
= OVERLAY_POSITION (start
);
2361 /* This one ends at or after POS
2362 so its start counts for PREV_PTR if it's before POS. */
2363 if (prev
< startpos
&& startpos
< pos
)
2367 if (startpos
<= pos
)
2371 /* The supplied vector is full.
2372 Either make it bigger, or don't store any more in it. */
2375 /* Make it work with an initial len == 0. */
2380 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2384 inhibit_storing
= 1;
2387 if (!inhibit_storing
)
2389 /* Keep counting overlays even if we can't return them all. */
2392 else if (startpos
< next
)
2396 for (tail
= current_buffer
->overlays_after
;
2400 int startpos
, endpos
;
2402 overlay
= XCAR (tail
);
2404 start
= OVERLAY_START (overlay
);
2405 end
= OVERLAY_END (overlay
);
2406 startpos
= OVERLAY_POSITION (start
);
2409 if (startpos
< next
)
2413 endpos
= OVERLAY_POSITION (end
);
2420 *len_ptr
= len
*= 2;
2423 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2427 inhibit_storing
= 1;
2430 if (!inhibit_storing
)
2434 if (startpos
< pos
&& startpos
> prev
)
2437 else if (endpos
< pos
&& endpos
> prev
)
2439 else if (endpos
== pos
&& startpos
> prev
2440 && (!change_req
|| startpos
< pos
))
2451 /* Find all the overlays in the current buffer that overlap the range BEG-END
2452 or are empty at BEG.
2454 Return the number found, and store them in a vector in *VEC_PTR.
2455 Store in *LEN_PTR the size allocated for the vector.
2456 Store in *NEXT_PTR the next position after POS where an overlay starts,
2457 or ZV if there are no more overlays.
2458 Store in *PREV_PTR the previous position before POS where an overlay ends,
2459 or BEGV if there are no previous overlays.
2460 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2462 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2463 when this function is called.
2465 If EXTEND is non-zero, we make the vector bigger if necessary.
2466 If EXTEND is zero, we never extend the vector,
2467 and we store only as many overlays as will fit.
2468 But we still return the total number of overlays. */
2471 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2474 Lisp_Object
**vec_ptr
;
2479 Lisp_Object tail
, overlay
, ostart
, oend
;
2482 Lisp_Object
*vec
= *vec_ptr
;
2485 int inhibit_storing
= 0;
2487 for (tail
= current_buffer
->overlays_before
;
2491 int startpos
, endpos
;
2493 overlay
= XCAR (tail
);
2495 ostart
= OVERLAY_START (overlay
);
2496 oend
= OVERLAY_END (overlay
);
2497 endpos
= OVERLAY_POSITION (oend
);
2504 startpos
= OVERLAY_POSITION (ostart
);
2505 /* Count an interval if it either overlaps the range
2506 or is empty at the start of the range. */
2507 if ((beg
< endpos
&& startpos
< end
)
2508 || (startpos
== endpos
&& beg
== endpos
))
2512 /* The supplied vector is full.
2513 Either make it bigger, or don't store any more in it. */
2516 *len_ptr
= len
*= 2;
2517 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2521 inhibit_storing
= 1;
2524 if (!inhibit_storing
)
2526 /* Keep counting overlays even if we can't return them all. */
2529 else if (startpos
< next
)
2533 for (tail
= current_buffer
->overlays_after
;
2537 int startpos
, endpos
;
2539 overlay
= XCAR (tail
);
2541 ostart
= OVERLAY_START (overlay
);
2542 oend
= OVERLAY_END (overlay
);
2543 startpos
= OVERLAY_POSITION (ostart
);
2546 if (startpos
< next
)
2550 endpos
= OVERLAY_POSITION (oend
);
2551 /* Count an interval if it either overlaps the range
2552 or is empty at the start of the range. */
2553 if ((beg
< endpos
&& startpos
< end
)
2554 || (startpos
== endpos
&& beg
== endpos
))
2560 *len_ptr
= len
*= 2;
2561 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2565 inhibit_storing
= 1;
2568 if (!inhibit_storing
)
2572 else if (endpos
< beg
&& endpos
> prev
)
2584 /* Return non-zero if there exists an overlay with a non-nil
2585 `mouse-face' property overlapping OVERLAY. */
2588 mouse_face_overlay_overlaps (overlay
)
2589 Lisp_Object overlay
;
2591 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2592 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2594 Lisp_Object
*v
, tem
;
2597 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2598 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2601 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2602 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2605 for (i
= 0; i
< n
; ++i
)
2606 if (!EQ (v
[i
], overlay
)
2607 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2616 /* Fast function to just test if we're at an overlay boundary. */
2618 overlay_touches_p (pos
)
2621 Lisp_Object tail
, overlay
;
2623 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2628 overlay
= XCAR (tail
);
2629 if (!GC_OVERLAYP (overlay
))
2632 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2635 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2639 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2644 overlay
= XCAR (tail
);
2645 if (!GC_OVERLAYP (overlay
))
2648 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2651 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2659 Lisp_Object overlay
;
2665 compare_overlays (v1
, v2
)
2666 const void *v1
, *v2
;
2668 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2669 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2670 if (s1
->priority
!= s2
->priority
)
2671 return s1
->priority
- s2
->priority
;
2672 if (s1
->beg
!= s2
->beg
)
2673 return s1
->beg
- s2
->beg
;
2674 if (s1
->end
!= s2
->end
)
2675 return s2
->end
- s1
->end
;
2679 /* Sort an array of overlays by priority. The array is modified in place.
2680 The return value is the new size; this may be smaller than the original
2681 size if some of the overlays were invalid or were window-specific. */
2683 sort_overlays (overlay_vec
, noverlays
, w
)
2684 Lisp_Object
*overlay_vec
;
2689 struct sortvec
*sortvec
;
2690 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2692 /* Put the valid and relevant overlays into sortvec. */
2694 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2697 Lisp_Object overlay
;
2699 overlay
= overlay_vec
[i
];
2700 if (OVERLAY_VALID (overlay
)
2701 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2702 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2704 /* If we're interested in a specific window, then ignore
2705 overlays that are limited to some other window. */
2710 window
= Foverlay_get (overlay
, Qwindow
);
2711 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2715 /* This overlay is good and counts: put it into sortvec. */
2716 sortvec
[j
].overlay
= overlay
;
2717 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2718 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2719 tem
= Foverlay_get (overlay
, Qpriority
);
2721 sortvec
[j
].priority
= XINT (tem
);
2723 sortvec
[j
].priority
= 0;
2729 /* Sort the overlays into the proper order: increasing priority. */
2732 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2734 for (i
= 0; i
< noverlays
; i
++)
2735 overlay_vec
[i
] = sortvec
[i
].overlay
;
2741 Lisp_Object string
, string2
;
2748 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2749 int size
; /* Allocated length of that array. */
2750 int used
; /* How much of the array is currently in use. */
2751 int bytes
; /* Total length of the strings in buf. */
2754 /* Buffers for storing information about the overlays touching a given
2755 position. These could be automatic variables in overlay_strings, but
2756 it's more efficient to hold onto the memory instead of repeatedly
2757 allocating and freeing it. */
2758 static struct sortstrlist overlay_heads
, overlay_tails
;
2759 static unsigned char *overlay_str_buf
;
2761 /* Allocated length of overlay_str_buf. */
2762 static int overlay_str_len
;
2764 /* A comparison function suitable for passing to qsort. */
2766 cmp_for_strings (as1
, as2
)
2769 struct sortstr
*s1
= (struct sortstr
*)as1
;
2770 struct sortstr
*s2
= (struct sortstr
*)as2
;
2771 if (s1
->size
!= s2
->size
)
2772 return s2
->size
- s1
->size
;
2773 if (s1
->priority
!= s2
->priority
)
2774 return s1
->priority
- s2
->priority
;
2779 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2780 struct sortstrlist
*ssl
;
2781 Lisp_Object str
, str2
, pri
;
2786 if (ssl
->used
== ssl
->size
)
2792 ssl
->buf
= ((struct sortstr
*)
2793 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2795 ssl
->buf
[ssl
->used
].string
= str
;
2796 ssl
->buf
[ssl
->used
].string2
= str2
;
2797 ssl
->buf
[ssl
->used
].size
= size
;
2798 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2801 if (NILP (current_buffer
->enable_multibyte_characters
))
2802 nbytes
= XSTRING (str
)->size
;
2803 else if (! STRING_MULTIBYTE (str
))
2804 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2805 STRING_BYTES (XSTRING (str
)));
2807 nbytes
= STRING_BYTES (XSTRING (str
));
2809 ssl
->bytes
+= nbytes
;
2813 if (NILP (current_buffer
->enable_multibyte_characters
))
2814 nbytes
= XSTRING (str2
)->size
;
2815 else if (! STRING_MULTIBYTE (str2
))
2816 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2817 STRING_BYTES (XSTRING (str2
)));
2819 nbytes
= STRING_BYTES (XSTRING (str2
));
2821 ssl
->bytes
+= nbytes
;
2825 /* Return the concatenation of the strings associated with overlays that
2826 begin or end at POS, ignoring overlays that are specific to a window
2827 other than W. The strings are concatenated in the appropriate order:
2828 shorter overlays nest inside longer ones, and higher priority inside
2829 lower. Normally all of the after-strings come first, but zero-sized
2830 overlays have their after-strings ride along with the before-strings
2831 because it would look strange to print them inside-out.
2833 Returns the string length, and stores the contents indirectly through
2834 PSTR, if that variable is non-null. The string may be overwritten by
2835 subsequent calls. */
2838 overlay_strings (pos
, w
, pstr
)
2841 unsigned char **pstr
;
2843 Lisp_Object ov
, overlay
, window
, str
;
2844 int startpos
, endpos
;
2845 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2847 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2848 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2849 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCDR (ov
))
2851 overlay
= XCAR (ov
);
2852 if (!OVERLAYP (overlay
))
2855 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2856 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2859 if (endpos
!= pos
&& startpos
!= pos
)
2861 window
= Foverlay_get (overlay
, Qwindow
);
2862 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2865 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2866 record_overlay_string (&overlay_heads
, str
,
2868 ? Foverlay_get (overlay
, Qafter_string
)
2870 Foverlay_get (overlay
, Qpriority
),
2872 else if (endpos
== pos
2873 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2874 record_overlay_string (&overlay_tails
, str
, Qnil
,
2875 Foverlay_get (overlay
, Qpriority
),
2878 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCDR (ov
))
2880 overlay
= XCAR (ov
);
2881 if (!OVERLAYP (overlay
))
2884 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2885 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2888 if (endpos
!= pos
&& startpos
!= pos
)
2890 window
= Foverlay_get (overlay
, Qwindow
);
2891 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2894 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2895 record_overlay_string (&overlay_heads
, str
,
2897 ? Foverlay_get (overlay
, Qafter_string
)
2899 Foverlay_get (overlay
, Qpriority
),
2901 else if (endpos
== pos
2902 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2903 record_overlay_string (&overlay_tails
, str
, Qnil
,
2904 Foverlay_get (overlay
, Qpriority
),
2907 if (overlay_tails
.used
> 1)
2908 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2910 if (overlay_heads
.used
> 1)
2911 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2913 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2918 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2920 if (total
> overlay_str_len
)
2922 overlay_str_len
= total
;
2923 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2926 p
= overlay_str_buf
;
2927 for (i
= overlay_tails
.used
; --i
>= 0;)
2930 tem
= overlay_tails
.buf
[i
].string
;
2931 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2932 STRING_BYTES (XSTRING (tem
)),
2933 STRING_MULTIBYTE (tem
), multibyte
);
2936 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2939 tem
= overlay_heads
.buf
[i
].string
;
2940 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2941 STRING_BYTES (XSTRING (tem
)),
2942 STRING_MULTIBYTE (tem
), multibyte
);
2944 tem
= overlay_heads
.buf
[i
].string2
;
2947 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2948 STRING_BYTES (XSTRING (tem
)),
2949 STRING_MULTIBYTE (tem
), multibyte
);
2953 if (p
!= overlay_str_buf
+ total
)
2956 *pstr
= overlay_str_buf
;
2962 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2965 recenter_overlay_lists (buf
, pos
)
2969 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2971 /* See if anything in overlays_before should move to overlays_after. */
2973 /* We don't strictly need prev in this loop; it should always be nil.
2974 But we use it for symmetry and in case that should cease to be true
2975 with some future change. */
2977 for (tail
= buf
->overlays_before
;
2979 prev
= tail
, tail
= next
)
2982 overlay
= XCAR (tail
);
2984 /* If the overlay is not valid, get rid of it. */
2985 if (!OVERLAY_VALID (overlay
))
2990 /* Splice the cons cell TAIL out of overlays_before. */
2994 buf
->overlays_before
= next
;
3000 beg
= OVERLAY_START (overlay
);
3001 end
= OVERLAY_END (overlay
);
3003 if (OVERLAY_POSITION (end
) > pos
)
3005 /* OVERLAY needs to be moved. */
3006 int where
= OVERLAY_POSITION (beg
);
3007 Lisp_Object other
, other_prev
;
3009 /* Splice the cons cell TAIL out of overlays_before. */
3013 buf
->overlays_before
= next
;
3015 /* Search thru overlays_after for where to put it. */
3017 for (other
= buf
->overlays_after
;
3019 other_prev
= other
, other
= XCDR (other
))
3021 Lisp_Object otherbeg
, otheroverlay
;
3023 otheroverlay
= XCAR (other
);
3024 if (! OVERLAY_VALID (otheroverlay
))
3027 otherbeg
= OVERLAY_START (otheroverlay
);
3028 if (OVERLAY_POSITION (otherbeg
) >= where
)
3032 /* Add TAIL to overlays_after before OTHER. */
3033 XCDR (tail
) = other
;
3034 if (!NILP (other_prev
))
3035 XCDR (other_prev
) = tail
;
3037 buf
->overlays_after
= tail
;
3041 /* We've reached the things that should stay in overlays_before.
3042 All the rest of overlays_before must end even earlier,
3047 /* See if anything in overlays_after should be in overlays_before. */
3049 for (tail
= buf
->overlays_after
;
3051 prev
= tail
, tail
= next
)
3054 overlay
= XCAR (tail
);
3056 /* If the overlay is not valid, get rid of it. */
3057 if (!OVERLAY_VALID (overlay
))
3062 /* Splice the cons cell TAIL out of overlays_after. */
3066 buf
->overlays_after
= next
;
3072 beg
= OVERLAY_START (overlay
);
3073 end
= OVERLAY_END (overlay
);
3075 /* Stop looking, when we know that nothing further
3076 can possibly end before POS. */
3077 if (OVERLAY_POSITION (beg
) > pos
)
3080 if (OVERLAY_POSITION (end
) <= pos
)
3082 /* OVERLAY needs to be moved. */
3083 int where
= OVERLAY_POSITION (end
);
3084 Lisp_Object other
, other_prev
;
3086 /* Splice the cons cell TAIL out of overlays_after. */
3090 buf
->overlays_after
= next
;
3092 /* Search thru overlays_before for where to put it. */
3094 for (other
= buf
->overlays_before
;
3096 other_prev
= other
, other
= XCDR (other
))
3098 Lisp_Object otherend
, otheroverlay
;
3100 otheroverlay
= XCAR (other
);
3101 if (! OVERLAY_VALID (otheroverlay
))
3104 otherend
= OVERLAY_END (otheroverlay
);
3105 if (OVERLAY_POSITION (otherend
) <= where
)
3109 /* Add TAIL to overlays_before before OTHER. */
3110 XCDR (tail
) = other
;
3111 if (!NILP (other_prev
))
3112 XCDR (other_prev
) = tail
;
3114 buf
->overlays_before
= tail
;
3119 XSETFASTINT (buf
->overlay_center
, pos
);
3123 adjust_overlays_for_insert (pos
, length
)
3127 /* After an insertion, the lists are still sorted properly,
3128 but we may need to update the value of the overlay center. */
3129 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
3130 XSETFASTINT (current_buffer
->overlay_center
,
3131 XFASTINT (current_buffer
->overlay_center
) + length
);
3135 adjust_overlays_for_delete (pos
, length
)
3139 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
3140 /* The deletion was to our right. No change needed; the before- and
3141 after-lists are still consistent. */
3143 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
3144 /* The deletion was to our left. We need to adjust the center value
3145 to account for the change in position, but the lists are consistent
3146 given the new value. */
3147 XSETFASTINT (current_buffer
->overlay_center
,
3148 XFASTINT (current_buffer
->overlay_center
) - length
);
3150 /* We're right in the middle. There might be things on the after-list
3151 that now belong on the before-list. Recentering will move them,
3152 and also update the center point. */
3153 recenter_overlay_lists (current_buffer
, pos
);
3156 /* Fix up overlays that were garbled as a result of permuting markers
3157 in the range START through END. Any overlay with at least one
3158 endpoint in this range will need to be unlinked from the overlay
3159 list and reinserted in its proper place.
3160 Such an overlay might even have negative size at this point.
3161 If so, we'll reverse the endpoints. Can you think of anything
3162 better to do in this situation? */
3164 fix_overlays_in_range (start
, end
)
3165 register int start
, end
;
3167 Lisp_Object overlay
;
3168 Lisp_Object before_list
, after_list
;
3169 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
3170 int startpos
, endpos
;
3172 /* This algorithm shifts links around instead of consing and GCing.
3173 The loop invariant is that before_list (resp. after_list) is a
3174 well-formed list except that its last element, the one that
3175 *pbefore (resp. *pafter) points to, is still uninitialized.
3176 So it's not a bug that before_list isn't initialized, although
3177 it may look strange. */
3178 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
3180 overlay
= XCAR (*ptail
);
3181 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3184 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3186 || (startpos
>= start
&& startpos
< end
))
3188 /* If the overlay is backwards, fix that now. */
3189 if (startpos
> endpos
)
3192 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3194 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3196 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3198 /* Add it to the end of the wrong list. Later on,
3199 recenter_overlay_lists will move it to the right place. */
3200 if (endpos
< XINT (current_buffer
->overlay_center
))
3203 pafter
= &XCDR (*ptail
);
3208 pbefore
= &XCDR (*ptail
);
3210 *ptail
= XCDR (*ptail
);
3213 ptail
= &XCDR (*ptail
);
3215 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
3217 overlay
= XCAR (*ptail
);
3218 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3219 if (startpos
>= end
)
3221 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3222 if (startpos
>= start
3223 || (endpos
>= start
&& endpos
< end
))
3225 if (startpos
> endpos
)
3228 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3230 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3232 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3234 if (endpos
< XINT (current_buffer
->overlay_center
))
3237 pafter
= &XCDR (*ptail
);
3242 pbefore
= &XCDR (*ptail
);
3244 *ptail
= XCDR (*ptail
);
3247 ptail
= &XCDR (*ptail
);
3250 /* Splice the constructed (wrong) lists into the buffer's lists,
3251 and let the recenter function make it sane again. */
3252 *pbefore
= current_buffer
->overlays_before
;
3253 current_buffer
->overlays_before
= before_list
;
3254 recenter_overlay_lists (current_buffer
,
3255 XINT (current_buffer
->overlay_center
));
3257 *pafter
= current_buffer
->overlays_after
;
3258 current_buffer
->overlays_after
= after_list
;
3259 recenter_overlay_lists (current_buffer
,
3260 XINT (current_buffer
->overlay_center
));
3263 /* We have two types of overlay: the one whose ending marker is
3264 after-insertion-marker (this is the usual case) and the one whose
3265 ending marker is before-insertion-marker. When `overlays_before'
3266 contains overlays of the latter type and the former type in this
3267 order and both overlays end at inserting position, inserting a text
3268 increases only the ending marker of the latter type, which results
3269 in incorrect ordering of `overlays_before'.
3271 This function fixes ordering of overlays in the slot
3272 `overlays_before' of the buffer *BP. Before the insertion, `point'
3273 was at PREV, and now is at POS. */
3276 fix_overlays_before (bp
, prev
, pos
)
3280 Lisp_Object
*tailp
= &bp
->overlays_before
;
3281 Lisp_Object
*right_place
;
3284 /* After the insertion, the several overlays may be in incorrect
3285 order. The possibility is that, in the list `overlays_before',
3286 an overlay which ends at POS appears after an overlay which ends
3287 at PREV. Since POS is greater than PREV, we must fix the
3288 ordering of these overlays, by moving overlays ends at POS before
3289 the overlays ends at PREV. */
3291 /* At first, find a place where disordered overlays should be linked
3292 in. It is where an overlay which end before POS exists. (i.e. an
3293 overlay whose ending marker is after-insertion-marker if disorder
3295 while (!NILP (*tailp
)
3296 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp
))))
3298 tailp
= &XCDR (*tailp
);
3300 /* If we don't find such an overlay,
3301 or the found one ends before PREV,
3302 or the found one is the last one in the list,
3303 we don't have to fix anything. */
3306 || NILP (XCDR (*tailp
)))
3309 right_place
= tailp
;
3310 tailp
= &XCDR (*tailp
);
3312 /* Now, end position of overlays in the list *TAILP should be before
3313 or equal to PREV. In the loop, an overlay which ends at POS is
3314 moved ahead to the place pointed by RIGHT_PLACE. If we found an
3315 overlay which ends before PREV, the remaining overlays are in
3317 while (!NILP (*tailp
))
3319 end
= OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp
)));
3322 { /* This overlay is disordered. */
3323 Lisp_Object found
= *tailp
;
3325 /* Unlink the found overlay. */
3326 *tailp
= XCDR (found
);
3327 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
3328 XCDR (found
) = *right_place
;
3329 /* Link it into the right place. */
3330 *right_place
= found
;
3332 else if (end
== prev
)
3333 tailp
= &XCDR (*tailp
);
3334 else /* No more disordered overlay. */
3339 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3340 /* Return t if OBJECT is an overlay. */
3344 return (OVERLAYP (object
) ? Qt
: Qnil
);
3347 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3348 /* Create a new overlay with range BEG to END in BUFFER.
3349 If omitted, BUFFER defaults to the current buffer.
3350 BEG and END may be integers or markers.
3351 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3352 front delimiter advance when text is inserted there.
3353 The fifth arg REAR-ADVANCE, if non-nil, makes the
3354 rear delimiter advance when text is inserted there. */
3355 (beg
, end
, buffer
, front_advance
, rear_advance
))
3356 Lisp_Object beg
, end
, buffer
;
3357 Lisp_Object front_advance
, rear_advance
;
3359 Lisp_Object overlay
;
3363 XSETBUFFER (buffer
, current_buffer
);
3365 CHECK_BUFFER (buffer
, 2);
3367 && ! EQ (Fmarker_buffer (beg
), buffer
))
3368 error ("Marker points into wrong buffer");
3370 && ! EQ (Fmarker_buffer (end
), buffer
))
3371 error ("Marker points into wrong buffer");
3373 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3374 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3376 if (XINT (beg
) > XINT (end
))
3379 temp
= beg
; beg
= end
; end
= temp
;
3382 b
= XBUFFER (buffer
);
3384 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3385 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3387 if (!NILP (front_advance
))
3388 XMARKER (beg
)->insertion_type
= 1;
3389 if (!NILP (rear_advance
))
3390 XMARKER (end
)->insertion_type
= 1;
3392 overlay
= allocate_misc ();
3393 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3394 XOVERLAY (overlay
)->start
= beg
;
3395 XOVERLAY (overlay
)->end
= end
;
3396 XOVERLAY (overlay
)->plist
= Qnil
;
3398 /* Put the new overlay on the wrong list. */
3399 end
= OVERLAY_END (overlay
);
3400 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3401 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3403 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3405 /* This puts it in the right list, and in the right order. */
3406 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3408 /* We don't need to redisplay the region covered by the overlay, because
3409 the overlay has no properties at the moment. */
3414 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3417 modify_overlay (buf
, start
, end
)
3428 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3430 /* If this is a buffer not in the selected window,
3431 we must do other windows. */
3432 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3433 windows_or_buffers_changed
= 1;
3434 /* If multiple windows show this buffer, we must do other windows. */
3435 else if (buffer_shared
> 1)
3436 windows_or_buffers_changed
= 1;
3438 ++BUF_OVERLAY_MODIFF (buf
);
3442 Lisp_Object
Fdelete_overlay ();
3444 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3445 /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3446 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3447 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3449 (overlay
, beg
, end
, buffer
))
3450 Lisp_Object overlay
, beg
, end
, buffer
;
3452 struct buffer
*b
, *ob
;
3453 Lisp_Object obuffer
;
3454 int count
= specpdl_ptr
- specpdl
;
3456 CHECK_OVERLAY (overlay
, 0);
3458 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3460 XSETBUFFER (buffer
, current_buffer
);
3461 CHECK_BUFFER (buffer
, 3);
3464 && ! EQ (Fmarker_buffer (beg
), buffer
))
3465 error ("Marker points into wrong buffer");
3467 && ! EQ (Fmarker_buffer (end
), buffer
))
3468 error ("Marker points into wrong buffer");
3470 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3471 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3473 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3474 return Fdelete_overlay (overlay
);
3476 if (XINT (beg
) > XINT (end
))
3479 temp
= beg
; beg
= end
; end
= temp
;
3482 specbind (Qinhibit_quit
, Qt
);
3484 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3485 b
= XBUFFER (buffer
);
3486 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3488 /* If the overlay has changed buffers, do a thorough redisplay. */
3489 if (!EQ (buffer
, obuffer
))
3491 /* Redisplay where the overlay was. */
3492 if (!NILP (obuffer
))
3497 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3498 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3500 modify_overlay (ob
, o_beg
, o_end
);
3503 /* Redisplay where the overlay is going to be. */
3504 modify_overlay (b
, XINT (beg
), XINT (end
));
3507 /* Redisplay the area the overlay has just left, or just enclosed. */
3511 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3512 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3514 if (o_beg
== XINT (beg
))
3515 modify_overlay (b
, o_end
, XINT (end
));
3516 else if (o_end
== XINT (end
))
3517 modify_overlay (b
, o_beg
, XINT (beg
));
3520 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3521 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3522 modify_overlay (b
, o_beg
, o_end
);
3526 if (!NILP (obuffer
))
3528 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3529 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3532 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3533 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3535 /* Put the overlay on the wrong list. */
3536 end
= OVERLAY_END (overlay
);
3537 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3538 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3540 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3542 /* This puts it in the right list, and in the right order. */
3543 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3545 return unbind_to (count
, overlay
);
3548 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3549 /* Delete the overlay OVERLAY from its buffer. */
3551 Lisp_Object overlay
;
3555 int count
= specpdl_ptr
- specpdl
;
3557 CHECK_OVERLAY (overlay
, 0);
3559 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3563 b
= XBUFFER (buffer
);
3564 specbind (Qinhibit_quit
, Qt
);
3566 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3567 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3569 marker_position (OVERLAY_START (overlay
)),
3570 marker_position (OVERLAY_END (overlay
)));
3571 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3572 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3574 /* When deleting an overlay with before or after strings, turn off
3575 display optimizations for the affected buffer, on the basis that
3576 these strings may contain newlines. This is easier to do than to
3577 check for that situation during redisplay. */
3578 if (!windows_or_buffers_changed
3579 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3580 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3581 b
->prevent_redisplay_optimizations_p
= 1;
3583 return unbind_to (count
, Qnil
);
3586 /* Overlay dissection functions. */
3588 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3589 /* Return the position at which OVERLAY starts. */
3591 Lisp_Object overlay
;
3593 CHECK_OVERLAY (overlay
, 0);
3595 return (Fmarker_position (OVERLAY_START (overlay
)));
3598 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3599 /* Return the position at which OVERLAY ends. */
3601 Lisp_Object overlay
;
3603 CHECK_OVERLAY (overlay
, 0);
3605 return (Fmarker_position (OVERLAY_END (overlay
)));
3608 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3609 /* Return the buffer OVERLAY belongs to. */
3611 Lisp_Object overlay
;
3613 CHECK_OVERLAY (overlay
, 0);
3615 return Fmarker_buffer (OVERLAY_START (overlay
));
3618 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3619 /* Return a list of the properties on OVERLAY.
3620 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3623 Lisp_Object overlay
;
3625 CHECK_OVERLAY (overlay
, 0);
3627 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3631 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3632 /* Return a list of the overlays that contain position POS. */
3637 Lisp_Object
*overlay_vec
;
3641 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3644 /* We can't use alloca here because overlays_at can call xrealloc. */
3645 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3647 /* Put all the overlays we want in a vector in overlay_vec.
3648 Store the length in len. */
3649 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3650 (int *) 0, (int *) 0, 0);
3652 /* Make a list of them all. */
3653 result
= Flist (noverlays
, overlay_vec
);
3655 xfree (overlay_vec
);
3659 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3660 /* Return a list of the overlays that overlap the region BEG ... END.
3661 Overlap means that at least one character is contained within the overlay
3662 and also contained within the specified region.
3663 Empty overlays are included in the result if they are located at BEG
3664 or between BEG and END. */
3666 Lisp_Object beg
, end
;
3669 Lisp_Object
*overlay_vec
;
3673 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
3674 CHECK_NUMBER_COERCE_MARKER (end
, 0);
3677 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3679 /* Put all the overlays we want in a vector in overlay_vec.
3680 Store the length in len. */
3681 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3682 (int *) 0, (int *) 0);
3684 /* Make a list of them all. */
3685 result
= Flist (noverlays
, overlay_vec
);
3687 xfree (overlay_vec
);
3691 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3693 /* Return the next position after POS where an overlay starts or ends.
3694 If there are no more overlay boundaries after POS, return (point-max). */
3700 Lisp_Object
*overlay_vec
;
3704 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3707 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3709 /* Put all the overlays we want in a vector in overlay_vec.
3710 Store the length in len.
3711 endpos gets the position where the next overlay starts. */
3712 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3713 &endpos
, (int *) 0, 1);
3715 /* If any of these overlays ends before endpos,
3716 use its ending point instead. */
3717 for (i
= 0; i
< noverlays
; i
++)
3722 oend
= OVERLAY_END (overlay_vec
[i
]);
3723 oendpos
= OVERLAY_POSITION (oend
);
3724 if (oendpos
< endpos
)
3728 xfree (overlay_vec
);
3729 return make_number (endpos
);
3732 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3733 Sprevious_overlay_change
, 1, 1, 0,
3734 /* Return the previous position before POS where an overlay starts or ends.
3735 If there are no more overlay boundaries before POS, return (point-min). */
3741 Lisp_Object
*overlay_vec
;
3744 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3746 /* At beginning of buffer, we know the answer;
3747 avoid bug subtracting 1 below. */
3748 if (XINT (pos
) == BEGV
)
3752 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3754 /* Put all the overlays we want in a vector in overlay_vec.
3755 Store the length in len.
3756 prevpos gets the position of the previous change. */
3757 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3758 (int *) 0, &prevpos
, 1);
3760 xfree (overlay_vec
);
3761 return make_number (prevpos
);
3764 /* These functions are for debugging overlays. */
3766 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3767 /* Return a pair of lists giving all the overlays of the current buffer.
3768 The car has all the overlays before the overlay center;
3769 the cdr has all the overlays after the overlay center.
3770 Recentering overlays moves overlays between these lists.
3771 The lists you get are copies, so that changing them has no effect.
3772 However, the overlays you get are the real objects that the buffer uses. */
3775 Lisp_Object before
, after
;
3776 before
= current_buffer
->overlays_before
;
3778 before
= Fcopy_sequence (before
);
3779 after
= current_buffer
->overlays_after
;
3781 after
= Fcopy_sequence (after
);
3783 return Fcons (before
, after
);
3786 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3787 /* Recenter the overlays of the current buffer around position POS. */
3791 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3793 recenter_overlay_lists (current_buffer
, XINT (pos
));
3797 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3798 /* Get the property of overlay OVERLAY with property name PROP. */
3800 Lisp_Object overlay
, prop
;
3802 Lisp_Object plist
, fallback
;
3804 CHECK_OVERLAY (overlay
, 0);
3808 for (plist
= XOVERLAY (overlay
)->plist
;
3809 CONSP (plist
) && CONSP (XCDR (plist
));
3810 plist
= XCDR (XCDR (plist
)))
3812 if (EQ (XCAR (plist
), prop
))
3813 return XCAR (XCDR (plist
));
3814 else if (EQ (XCAR (plist
), Qcategory
))
3817 tem
= Fcar (Fcdr (plist
));
3819 fallback
= Fget (tem
, prop
);
3826 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3827 /* Set one property of overlay OVERLAY: give property PROP value VALUE. */
3828 (overlay
, prop
, value
))
3829 Lisp_Object overlay
, prop
, value
;
3831 Lisp_Object tail
, buffer
;
3834 CHECK_OVERLAY (overlay
, 0);
3836 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3838 for (tail
= XOVERLAY (overlay
)->plist
;
3839 CONSP (tail
) && CONSP (XCDR (tail
));
3840 tail
= XCDR (XCDR (tail
)))
3841 if (EQ (XCAR (tail
), prop
))
3843 changed
= !EQ (XCAR (XCDR (tail
)), value
);
3844 XCAR (XCDR (tail
)) = value
;
3847 /* It wasn't in the list, so add it to the front. */
3848 changed
= !NILP (value
);
3849 XOVERLAY (overlay
)->plist
3850 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3852 if (! NILP (buffer
))
3855 modify_overlay (XBUFFER (buffer
),
3856 marker_position (OVERLAY_START (overlay
)),
3857 marker_position (OVERLAY_END (overlay
)));
3858 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3859 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3860 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3861 Fdelete_overlay (overlay
);
3866 /* Subroutine of report_overlay_modification. */
3868 /* Lisp vector holding overlay hook functions to call.
3869 Vector elements come in pairs.
3870 Each even-index element is a list of hook functions.
3871 The following odd-index element is the overlay they came from.
3873 Before the buffer change, we fill in this vector
3874 as we call overlay hook functions.
3875 After the buffer change, we get the functions to call from this vector.
3876 This way we always call the same functions before and after the change. */
3877 static Lisp_Object last_overlay_modification_hooks
;
3879 /* Number of elements actually used in last_overlay_modification_hooks. */
3880 static int last_overlay_modification_hooks_used
;
3882 /* Add one functionlist/overlay pair
3883 to the end of last_overlay_modification_hooks. */
3886 add_overlay_mod_hooklist (functionlist
, overlay
)
3887 Lisp_Object functionlist
, overlay
;
3889 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3891 if (last_overlay_modification_hooks_used
== oldsize
)
3894 old
= last_overlay_modification_hooks
;
3895 last_overlay_modification_hooks
3896 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3897 bcopy (XVECTOR (old
)->contents
,
3898 XVECTOR (last_overlay_modification_hooks
)->contents
,
3899 sizeof (Lisp_Object
) * oldsize
);
3901 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3902 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3905 /* Run the modification-hooks of overlays that include
3906 any part of the text in START to END.
3907 If this change is an insertion, also
3908 run the insert-before-hooks of overlay starting at END,
3909 and the insert-after-hooks of overlay ending at START.
3911 This is called both before and after the modification.
3912 AFTER is nonzero when we call after the modification.
3914 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3915 When AFTER is nonzero, they are the start position,
3916 the position after the inserted new text,
3917 and the length of deleted or replaced old text. */
3920 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3921 Lisp_Object start
, end
;
3923 Lisp_Object arg1
, arg2
, arg3
;
3925 Lisp_Object prop
, overlay
, tail
;
3926 /* 1 if this change is an insertion. */
3927 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3929 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3933 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3937 /* Call the functions recorded in last_overlay_modification_hooks
3938 rather than scanning the overlays again.
3939 First copy the vector contents, in case some of these hooks
3940 do subsequent modification of the buffer. */
3941 int size
= last_overlay_modification_hooks_used
;
3942 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3945 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3946 copy
, size
* sizeof (Lisp_Object
));
3948 gcpro1
.nvars
= size
;
3950 for (i
= 0; i
< size
;)
3952 Lisp_Object prop
, overlay
;
3954 overlay
= copy
[i
++];
3955 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3961 /* We are being called before a change.
3962 Scan the overlays to find the functions to call. */
3963 last_overlay_modification_hooks_used
= 0;
3965 for (tail
= current_buffer
->overlays_before
;
3969 int startpos
, endpos
;
3970 Lisp_Object ostart
, oend
;
3972 overlay
= XCAR (tail
);
3974 ostart
= OVERLAY_START (overlay
);
3975 oend
= OVERLAY_END (overlay
);
3976 endpos
= OVERLAY_POSITION (oend
);
3977 if (XFASTINT (start
) > endpos
)
3979 startpos
= OVERLAY_POSITION (ostart
);
3980 if (insertion
&& (XFASTINT (start
) == startpos
3981 || XFASTINT (end
) == startpos
))
3983 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3986 /* Copy TAIL in case the hook recenters the overlay lists. */
3988 tail
= Fcopy_sequence (tail
);
3990 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3993 if (insertion
&& (XFASTINT (start
) == endpos
3994 || XFASTINT (end
) == endpos
))
3996 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4000 tail
= Fcopy_sequence (tail
);
4002 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4005 /* Test for intersecting intervals. This does the right thing
4006 for both insertion and deletion. */
4007 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4009 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4013 tail
= Fcopy_sequence (tail
);
4015 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4021 for (tail
= current_buffer
->overlays_after
;
4025 int startpos
, endpos
;
4026 Lisp_Object ostart
, oend
;
4028 overlay
= XCAR (tail
);
4030 ostart
= OVERLAY_START (overlay
);
4031 oend
= OVERLAY_END (overlay
);
4032 startpos
= OVERLAY_POSITION (ostart
);
4033 endpos
= OVERLAY_POSITION (oend
);
4034 if (XFASTINT (end
) < startpos
)
4036 if (insertion
&& (XFASTINT (start
) == startpos
4037 || XFASTINT (end
) == startpos
))
4039 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4043 tail
= Fcopy_sequence (tail
);
4045 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4048 if (insertion
&& (XFASTINT (start
) == endpos
4049 || XFASTINT (end
) == endpos
))
4051 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4055 tail
= Fcopy_sequence (tail
);
4057 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4060 /* Test for intersecting intervals. This does the right thing
4061 for both insertion and deletion. */
4062 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4064 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4068 tail
= Fcopy_sequence (tail
);
4070 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4079 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4080 Lisp_Object list
, overlay
;
4082 Lisp_Object arg1
, arg2
, arg3
;
4084 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4086 GCPRO4 (list
, arg1
, arg2
, arg3
);
4088 add_overlay_mod_hooklist (list
, overlay
);
4090 while (!NILP (list
))
4093 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4095 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4101 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4104 evaporate_overlays (pos
)
4107 Lisp_Object tail
, overlay
, hit_list
;
4110 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
4111 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
4115 overlay
= XCAR (tail
);
4116 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4119 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4120 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4121 hit_list
= Fcons (overlay
, hit_list
);
4124 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
4128 overlay
= XCAR (tail
);
4129 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4132 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4133 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4134 hit_list
= Fcons (overlay
, hit_list
);
4136 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4137 Fdelete_overlay (XCAR (hit_list
));
4140 /* Somebody has tried to store a value with an unacceptable type
4141 in the slot with offset OFFSET. */
4144 buffer_slot_type_mismatch (offset
)
4150 switch (XINT (PER_BUFFER_TYPE (offset
)))
4153 type_name
= "integers";
4157 type_name
= "strings";
4161 type_name
= "symbols";
4168 sym
= PER_BUFFER_SYMBOL (offset
);
4169 error ("Only %s should be stored in the buffer-local variable %s",
4170 type_name
, XSYMBOL (sym
)->name
->data
);
4174 /***********************************************************************
4175 Allocation with mmap
4176 ***********************************************************************/
4178 #ifdef USE_MMAP_FOR_BUFFERS
4180 #include <sys/types.h>
4181 #include <sys/mman.h>
4184 #ifdef MAP_ANONYMOUS
4185 #define MAP_ANON MAP_ANONYMOUS
4192 #define MAP_FAILED ((void *) -1)
4205 /* Memory is allocated in regions which are mapped using mmap(2).
4206 The current implementation lets the system select mapped
4207 addresses; we're not using MAP_FIXED in general, except when
4208 trying to enlarge regions.
4210 Each mapped region starts with a mmap_region structure, the user
4211 area starts after that structure, aligned to MEM_ALIGN.
4213 +-----------------------+
4214 | struct mmap_info + |
4216 +-----------------------+
4220 +-----------------------+ */
4224 /* User-specified size. */
4225 size_t nbytes_specified
;
4227 /* Number of bytes mapped */
4228 size_t nbytes_mapped
;
4230 /* Pointer to the location holding the address of the memory
4231 allocated with the mmap'd block. The variable actually points
4232 after this structure. */
4235 /* Next and previous in list of all mmap'd regions. */
4236 struct mmap_region
*next
, *prev
;
4239 /* Doubly-linked list of mmap'd regions. */
4241 static struct mmap_region
*mmap_regions
;
4243 /* File descriptor for mmap. If we don't have anonymous mapping,
4244 /dev/zero will be opened on it. */
4248 /* Temporary storage for mmap_set_vars, see there. */
4250 static struct mmap_region
*mmap_regions_1
;
4251 static int mmap_fd_1
;
4253 /* Page size on this system. */
4255 static int mmap_page_size
;
4257 /* 1 means mmap has been intialized. */
4259 static int mmap_initialized_p
;
4261 /* Value is X rounded up to the next multiple of N. */
4263 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4265 /* Size of mmap_region structure plus padding. */
4267 #define MMAP_REGION_STRUCT_SIZE \
4268 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4270 /* Given a pointer P to the start of the user-visible part of a mapped
4271 region, return a pointer to the start of the region. */
4273 #define MMAP_REGION(P) \
4274 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4276 /* Given a pointer P to the start of a mapped region, return a pointer
4277 to the start of the user-visible part of the region. */
4279 #define MMAP_USER_AREA(P) \
4280 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4282 #define MEM_ALIGN sizeof (double)
4284 /* Function prototypes. */
4286 static int mmap_free_1
P_ ((struct mmap_region
*));
4287 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4288 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4289 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4290 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4291 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4292 static void mmap_init
P_ ((void));
4295 /* Return a region overlapping address range START...END, or null if
4296 none. END is not including, i.e. the last byte in the range
4299 static struct mmap_region
*
4300 mmap_find (start
, end
)
4301 POINTER_TYPE
*start
, *end
;
4303 struct mmap_region
*r
;
4304 char *s
= (char *) start
, *e
= (char *) end
;
4306 for (r
= mmap_regions
; r
; r
= r
->next
)
4308 char *rstart
= (char *) r
;
4309 char *rend
= rstart
+ r
->nbytes_mapped
;
4311 if (/* First byte of range, i.e. START, in this region? */
4312 (s
>= rstart
&& s
< rend
)
4313 /* Last byte of range, i.e. END - 1, in this region? */
4314 || (e
> rstart
&& e
<= rend
)
4315 /* First byte of this region in the range? */
4316 || (rstart
>= s
&& rstart
< e
)
4317 /* Last byte of this region in the range? */
4318 || (rend
> s
&& rend
<= e
))
4326 /* Unmap a region. P is a pointer to the start of the user-araa of
4327 the region. Value is non-zero if successful. */
4331 struct mmap_region
*r
;
4334 r
->next
->prev
= r
->prev
;
4336 r
->prev
->next
= r
->next
;
4338 mmap_regions
= r
->next
;
4340 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4342 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4350 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4351 Value is non-zero if successful. */
4354 mmap_enlarge (r
, npages
)
4355 struct mmap_region
*r
;
4358 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4364 /* Unmap pages at the end of the region. */
4365 nbytes
= - npages
* mmap_page_size
;
4366 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4367 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4370 r
->nbytes_mapped
-= nbytes
;
4374 else if (npages
> 0)
4376 struct mmap_region
*r2
;
4378 nbytes
= npages
* mmap_page_size
;
4380 /* Try to map additional pages at the end of the region. We
4381 cannot do this if the address range is already occupied by
4382 something else because mmap deletes any previous mapping.
4383 I'm not sure this is worth doing, let's see. */
4384 r2
= mmap_find (region_end
, region_end
+ nbytes
);
4389 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4390 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4391 if (p
== MAP_FAILED
)
4392 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4393 else if (p
!= (POINTER_TYPE
*) region_end
)
4395 /* Kernels are free to choose a different address. In
4396 that case, unmap what we've mapped above; we have
4398 if (munmap (p
, nbytes
) == -1)
4399 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4403 r
->nbytes_mapped
+= nbytes
;
4413 /* Set or reset variables holding references to mapped regions. If
4414 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4415 non-zero, set all variables to the start of the user-areas
4418 This function is called from Fdump_emacs to ensure that the dumped
4419 Emacs doesn't contain references to memory that won't be mapped
4420 when Emacs starts. */
4423 mmap_set_vars (restore_p
)
4426 struct mmap_region
*r
;
4430 mmap_regions
= mmap_regions_1
;
4431 mmap_fd
= mmap_fd_1
;
4432 for (r
= mmap_regions
; r
; r
= r
->next
)
4433 *r
->var
= MMAP_USER_AREA (r
);
4437 for (r
= mmap_regions
; r
; r
= r
->next
)
4439 mmap_regions_1
= mmap_regions
;
4440 mmap_regions
= NULL
;
4441 mmap_fd_1
= mmap_fd
;
4447 /* Allocate a block of storage large enough to hold NBYTES bytes of
4448 data. A pointer to the data is returned in *VAR. VAR is thus the
4449 address of some variable which will use the data area.
4451 The allocation of 0 bytes is valid.
4453 If we can't allocate the necessary memory, set *VAR to null, and
4456 static POINTER_TYPE
*
4457 mmap_alloc (var
, nbytes
)
4466 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4467 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4470 if (p
== MAP_FAILED
)
4472 if (errno
!= ENOMEM
)
4473 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4478 struct mmap_region
*r
= (struct mmap_region
*) p
;
4480 r
->nbytes_specified
= nbytes
;
4481 r
->nbytes_mapped
= map
;
4484 r
->next
= mmap_regions
;
4489 p
= MMAP_USER_AREA (p
);
4496 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4497 resize it to size NBYTES. Change *VAR to reflect the new block,
4498 and return this value. If more memory cannot be allocated, then
4499 leave *VAR unchanged, and return null. */
4501 static POINTER_TYPE
*
4502 mmap_realloc (var
, nbytes
)
4506 POINTER_TYPE
*result
;
4511 result
= mmap_alloc (var
, nbytes
);
4512 else if (nbytes
== 0)
4515 result
= mmap_alloc (var
, nbytes
);
4519 struct mmap_region
*r
= MMAP_REGION (*var
);
4520 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4525 POINTER_TYPE
*old_ptr
= *var
;
4527 /* Try to map additional pages at the end of the region.
4528 If that fails, allocate a new region, copy data
4529 from the old region, then free it. */
4530 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4533 r
->nbytes_specified
= nbytes
;
4534 *var
= result
= old_ptr
;
4536 else if (mmap_alloc (var
, nbytes
))
4538 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4539 mmap_free_1 (MMAP_REGION (old_ptr
));
4541 r
= MMAP_REGION (result
);
4542 r
->nbytes_specified
= nbytes
;
4550 else if (room
- nbytes
>= mmap_page_size
)
4552 /* Shrinking by at least a page. Let's give some
4553 memory back to the system. */
4554 mmap_enlarge (r
, - (room
- nbytes
) / mmap_page_size
);
4556 r
->nbytes_specified
= nbytes
;
4560 /* Leave it alone. */
4562 r
->nbytes_specified
= nbytes
;
4570 /* Free a block of relocatable storage whose data is pointed to by
4571 PTR. Store 0 in *PTR to show there's no block allocated. */
4581 mmap_free_1 (MMAP_REGION (*var
));
4587 /* Perform necessary intializations for the use of mmap. */
4593 /* The value of mmap_fd is initially 0 in temacs, and -1
4594 in a dumped Emacs. */
4597 /* No anonymous mmap -- we need the file descriptor. */
4598 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4600 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4602 #endif /* MAP_ANON == 0 */
4604 if (mmap_initialized_p
)
4606 mmap_initialized_p
= 1;
4612 mmap_page_size
= getpagesize ();
4615 #endif /* USE_MMAP_FOR_BUFFERS */
4619 /***********************************************************************
4620 Buffer-text Allocation
4621 ***********************************************************************/
4624 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4625 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4626 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4627 #endif /* REL_ALLOC */
4630 /* Allocate NBYTES bytes for buffer B's text buffer. */
4633 alloc_buffer_text (b
, nbytes
)
4640 #if defined USE_MMAP_FOR_BUFFERS
4641 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4642 #elif defined REL_ALLOC
4643 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4645 p
= xmalloc (nbytes
);
4654 b
->text
->beg
= (unsigned char *) p
;
4658 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4662 enlarge_buffer_text (b
, delta
)
4667 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4670 #if defined USE_MMAP_FOR_BUFFERS
4671 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4672 #elif defined REL_ALLOC
4673 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4675 p
= xrealloc (b
->text
->beg
, nbytes
);
4684 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4689 /* Free buffer B's text buffer. */
4692 free_buffer_text (b
)
4697 #if defined USE_MMAP_FOR_BUFFERS
4698 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4699 #elif defined REL_ALLOC
4700 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4702 xfree (b
->text
->beg
);
4705 BUF_BEG_ADDR (b
) = NULL
;
4711 /***********************************************************************
4713 ***********************************************************************/
4720 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4722 /* Make sure all markable slots in buffer_defaults
4723 are initialized reasonably, so mark_buffer won't choke. */
4724 reset_buffer (&buffer_defaults
);
4725 reset_buffer_local_variables (&buffer_defaults
, 1);
4726 reset_buffer (&buffer_local_symbols
);
4727 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4728 /* Prevent GC from getting confused. */
4729 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4730 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4731 BUF_INTERVALS (&buffer_defaults
) = 0;
4732 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4733 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4734 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4736 /* Set up the default values of various buffer slots. */
4737 /* Must do these before making the first buffer! */
4739 /* real setup is done in bindings.el */
4740 buffer_defaults
.mode_line_format
= build_string ("%-");
4741 buffer_defaults
.header_line_format
= Qnil
;
4742 buffer_defaults
.abbrev_mode
= Qnil
;
4743 buffer_defaults
.overwrite_mode
= Qnil
;
4744 buffer_defaults
.case_fold_search
= Qt
;
4745 buffer_defaults
.auto_fill_function
= Qnil
;
4746 buffer_defaults
.selective_display
= Qnil
;
4748 buffer_defaults
.selective_display_ellipses
= Qt
;
4750 buffer_defaults
.abbrev_table
= Qnil
;
4751 buffer_defaults
.display_table
= Qnil
;
4752 buffer_defaults
.undo_list
= Qnil
;
4753 buffer_defaults
.mark_active
= Qnil
;
4754 buffer_defaults
.file_format
= Qnil
;
4755 buffer_defaults
.overlays_before
= Qnil
;
4756 buffer_defaults
.overlays_after
= Qnil
;
4757 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
4759 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4760 buffer_defaults
.truncate_lines
= Qnil
;
4761 buffer_defaults
.ctl_arrow
= Qt
;
4762 buffer_defaults
.direction_reversed
= Qnil
;
4763 buffer_defaults
.cursor_type
= Qt
;
4764 buffer_defaults
.extra_line_spacing
= Qnil
;
4767 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4769 buffer_defaults
.enable_multibyte_characters
= Qt
;
4770 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4771 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4772 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4773 buffer_defaults
.cache_long_line_scans
= Qnil
;
4774 buffer_defaults
.file_truename
= Qnil
;
4775 XSETFASTINT (buffer_defaults
.display_count
, 0);
4776 buffer_defaults
.indicate_empty_lines
= Qnil
;
4777 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4778 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4779 buffer_defaults
.display_time
= Qnil
;
4781 /* Assign the local-flags to the slots that have default values.
4782 The local flag is a bit that is used in the buffer
4783 to say that it has its own local value for the slot.
4784 The local flag bits are in the local_var_flags slot of the buffer. */
4786 /* Nothing can work if this isn't true */
4787 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4789 /* 0 means not a lisp var, -1 means always local, else mask */
4790 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4791 XSETINT (buffer_local_flags
.filename
, -1);
4792 XSETINT (buffer_local_flags
.directory
, -1);
4793 XSETINT (buffer_local_flags
.backed_up
, -1);
4794 XSETINT (buffer_local_flags
.save_length
, -1);
4795 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
4796 XSETINT (buffer_local_flags
.read_only
, -1);
4797 XSETINT (buffer_local_flags
.major_mode
, -1);
4798 XSETINT (buffer_local_flags
.mode_name
, -1);
4799 XSETINT (buffer_local_flags
.undo_list
, -1);
4800 XSETINT (buffer_local_flags
.mark_active
, -1);
4801 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
4802 XSETINT (buffer_local_flags
.file_truename
, -1);
4803 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
4804 XSETINT (buffer_local_flags
.file_format
, -1);
4805 XSETINT (buffer_local_flags
.display_count
, -1);
4806 XSETINT (buffer_local_flags
.display_time
, -1);
4807 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
4810 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
4811 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
4812 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
4813 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
4814 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
4815 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
4817 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
4819 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
4820 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
4821 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
4822 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
4823 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
4824 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
4825 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
4827 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
4828 /* Make this one a permanent local. */
4829 buffer_permanent_local_flags
[idx
++] = 1;
4831 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
4832 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
4833 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
4834 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
4835 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
4836 /* Make this one a permanent local. */
4837 buffer_permanent_local_flags
[idx
++] = 1;
4838 XSETFASTINT (buffer_local_flags
.left_margin_width
, idx
); ++idx
;
4839 XSETFASTINT (buffer_local_flags
.right_margin_width
, idx
); ++idx
;
4840 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
4841 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
4842 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
4843 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
4844 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
4845 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
4847 /* Need more room? */
4848 if (idx
>= MAX_PER_BUFFER_VARS
)
4850 last_per_buffer_idx
= idx
;
4852 Vbuffer_alist
= Qnil
;
4856 QSFundamental
= build_string ("Fundamental");
4858 Qfundamental_mode
= intern ("fundamental-mode");
4859 buffer_defaults
.major_mode
= Qfundamental_mode
;
4861 Qmode_class
= intern ("mode-class");
4863 Qprotected_field
= intern ("protected-field");
4865 Qpermanent_local
= intern ("permanent-local");
4867 Qkill_buffer_hook
= intern ("kill-buffer-hook");
4869 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
4871 /* super-magic invisible buffer */
4872 Vbuffer_alist
= Qnil
;
4874 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4876 inhibit_modification_hooks
= 0;
4882 char buf
[MAXPATHLEN
+ 1];
4884 struct stat dotstat
, pwdstat
;
4888 #ifdef USE_MMAP_FOR_BUFFERS
4890 /* When using the ralloc implementation based on mmap(2), buffer
4891 text pointers will have been set to null in the dumped Emacs.
4895 for (b
= all_buffers
; b
; b
= b
->next
)
4896 if (b
->text
->beg
== NULL
)
4897 enlarge_buffer_text (b
, 0);
4899 #endif /* USE_MMAP_FOR_BUFFERS */
4901 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4902 if (NILP (buffer_defaults
.enable_multibyte_characters
))
4903 Fset_buffer_multibyte (Qnil
);
4905 /* If PWD is accurate, use it instead of calling getwd. This is faster
4906 when PWD is right, and may avoid a fatal error. */
4907 if ((pwd
= getenv ("PWD")) != 0
4908 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
4909 && stat (pwd
, &pwdstat
) == 0
4910 && stat (".", &dotstat
) == 0
4911 && dotstat
.st_ino
== pwdstat
.st_ino
4912 && dotstat
.st_dev
== pwdstat
.st_dev
4913 && strlen (pwd
) < MAXPATHLEN
)
4916 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
4917 fatal ("`getcwd' failed: %s\n", strerror (errno
));
4919 else if (getwd (buf
) == 0)
4920 fatal ("`getwd' failed: %s\n", buf
);
4924 /* Maybe this should really use some standard subroutine
4925 whose definition is filename syntax dependent. */
4927 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
4929 buf
[rc
] = DIRECTORY_SEP
;
4932 #endif /* not VMS */
4934 current_buffer
->directory
= build_string (buf
);
4936 /* Add /: to the front of the name
4937 if it would otherwise be treated as magic. */
4938 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
4940 /* If the default dir is just /, TEMP is non-nil
4941 because of the ange-ftp completion handler.
4942 However, it is not necessary to turn / into /:/.
4943 So avoid doing that. */
4944 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
4945 current_buffer
->directory
4946 = concat2 (build_string ("/:"), current_buffer
->directory
);
4948 temp
= get_minibuffer (0);
4949 XBUFFER (temp
)->directory
= current_buffer
->directory
;
4952 /* initialize the buffer routines */
4956 staticpro (&last_overlay_modification_hooks
);
4957 last_overlay_modification_hooks
4958 = Fmake_vector (make_number (10), Qnil
);
4960 staticpro (&Vbuffer_defaults
);
4961 staticpro (&Vbuffer_local_symbols
);
4962 staticpro (&Qfundamental_mode
);
4963 staticpro (&Qmode_class
);
4964 staticpro (&QSFundamental
);
4965 staticpro (&Vbuffer_alist
);
4966 staticpro (&Qprotected_field
);
4967 staticpro (&Qpermanent_local
);
4968 staticpro (&Qkill_buffer_hook
);
4969 Qoverlayp
= intern ("overlayp");
4970 staticpro (&Qoverlayp
);
4971 Qevaporate
= intern ("evaporate");
4972 staticpro (&Qevaporate
);
4973 Qmodification_hooks
= intern ("modification-hooks");
4974 staticpro (&Qmodification_hooks
);
4975 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
4976 staticpro (&Qinsert_in_front_hooks
);
4977 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
4978 staticpro (&Qinsert_behind_hooks
);
4979 Qget_file_buffer
= intern ("get-file-buffer");
4980 staticpro (&Qget_file_buffer
);
4981 Qpriority
= intern ("priority");
4982 staticpro (&Qpriority
);
4983 Qwindow
= intern ("window");
4984 staticpro (&Qwindow
);
4985 Qbefore_string
= intern ("before-string");
4986 staticpro (&Qbefore_string
);
4987 Qafter_string
= intern ("after-string");
4988 staticpro (&Qafter_string
);
4989 Qfirst_change_hook
= intern ("first-change-hook");
4990 staticpro (&Qfirst_change_hook
);
4991 Qbefore_change_functions
= intern ("before-change-functions");
4992 staticpro (&Qbefore_change_functions
);
4993 Qafter_change_functions
= intern ("after-change-functions");
4994 staticpro (&Qafter_change_functions
);
4996 Fput (Qprotected_field
, Qerror_conditions
,
4997 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
4998 Fput (Qprotected_field
, Qerror_message
,
4999 build_string ("Attempt to modify a protected field"));
5001 /* All these use DEFVAR_LISP_NOPRO because the slots in
5002 buffer_defaults will all be marked via Vbuffer_defaults. */
5004 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5005 &buffer_defaults
.mode_line_format
5006 /* Default value of `mode-line-format' for buffers that don't override it.
5007 This is the same as (default-value 'mode-line-format). */);
5009 DEFVAR_LISP_NOPRO ("default-header-line-format",
5010 &buffer_defaults
.header_line_format
5011 /* Default value of `header-line-format' for buffers that don't override it.
5012 This is the same as (default-value 'header-line-format). */);
5014 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
5015 /* Default value of `cursor-type' for buffers that don't override it.
5016 This is the same as (default-value 'cursor-type). */);
5018 DEFVAR_LISP_NOPRO ("default-line-spacing",
5019 &buffer_defaults
.extra_line_spacing
5020 /* Default value of `line-spacing' for buffers that don't override it.
5021 This is the same as (default-value 'line-spacing). */);
5023 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5024 &buffer_defaults
.abbrev_mode
5025 /* Default value of `abbrev-mode' for buffers that do not override it.
5026 This is the same as (default-value 'abbrev-mode). */);
5028 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5029 &buffer_defaults
.ctl_arrow
5030 /* Default value of `ctl-arrow' for buffers that do not override it.
5031 This is the same as (default-value 'ctl-arrow). */);
5033 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5034 &buffer_defaults
.direction_reversed
5035 /* Default value of `direction_reversed' for buffers that do not override it.
5036 This is the same as (default-value 'direction-reversed). */);
5038 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5039 &buffer_defaults
.enable_multibyte_characters
5040 /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5041 This is the same as (default-value 'enable-multibyte-characters). */);
5043 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5044 &buffer_defaults
.buffer_file_coding_system
5045 /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5046 This is the same as (default-value 'buffer-file-coding-system). */);
5048 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5049 &buffer_defaults
.truncate_lines
5050 /* Default value of `truncate-lines' for buffers that do not override it.
5051 This is the same as (default-value 'truncate-lines). */);
5053 DEFVAR_LISP_NOPRO ("default-fill-column",
5054 &buffer_defaults
.fill_column
5055 /* Default value of `fill-column' for buffers that do not override it.
5056 This is the same as (default-value 'fill-column). */);
5058 DEFVAR_LISP_NOPRO ("default-left-margin",
5059 &buffer_defaults
.left_margin
5060 /* Default value of `left-margin' for buffers that do not override it.
5061 This is the same as (default-value 'left-margin). */);
5063 DEFVAR_LISP_NOPRO ("default-tab-width",
5064 &buffer_defaults
.tab_width
5065 /* Default value of `tab-width' for buffers that do not override it.
5066 This is the same as (default-value 'tab-width). */);
5068 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5069 &buffer_defaults
.case_fold_search
5070 /* Default value of `case-fold-search' for buffers that don't override it.
5071 This is the same as (default-value 'case-fold-search). */);
5074 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5075 &buffer_defaults
.buffer_file_type
5076 /* Default file type for buffers that do not override it.
5077 This is the same as (default-value 'buffer-file-type).
5078 The file type is nil for text, t for binary. */);
5081 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5082 &buffer_defaults
.left_margin_width
5083 /* Default value of `left-margin-width' for buffers that don't override it.
5084 This is the same as (default-value 'left-margin-width). */);
5086 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5087 &buffer_defaults
.right_margin_width
5088 /* Default value of `right_margin_width' for buffers that don't override it.
5089 This is the same as (default-value 'right-margin-width). */);
5091 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5092 &buffer_defaults
.indicate_empty_lines
5093 /* Default value of `indicate-empty-lines' for buffers that don't override it.
5094 This is the same as (default-value 'indicate-empty-lines). */);
5096 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5097 &buffer_defaults
.scroll_up_aggressively
5098 /* Default value of `scroll-up-aggressively' for buffers that
5099 don't override it. This is the same as (default-value
5100 'scroll-up-aggressively). */);
5102 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5103 &buffer_defaults
.scroll_down_aggressively
5104 /* Default value of `scroll-down-aggressively' for buffers that
5105 don't override it. This is the same as (default-value
5106 'scroll-down-aggressively). */);
5108 DEFVAR_PER_BUFFER ("header-line-format",
5109 ¤t_buffer
->header_line_format
,
5111 /* Analogous to `mode-line-format', but for the mode line that can be
5112 displayed at the top of a window. */);
5114 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5116 /* Template for displaying mode line for current buffer.
5117 Each buffer has its own value of this variable.
5118 Value may be nil, a string, a symbol or a list or cons cell.
5119 A value of nil means don't display a mode line.
5120 For a symbol, its value is used (but it is ignored if t or nil).
5121 A string appearing directly as the value of a symbol is processed verbatim
5122 in that the %-constructs below are not recognized.
5123 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5124 is used as a mode line element.
5125 For a list whose car is a symbol, the symbol's value is taken,
5126 and if that is non-nil, the cadr of the list is processed recursively.
5127 Otherwise, the caddr of the list (if there is one) is processed.
5128 For a list whose car is a string or list, each element is processed
5129 recursively and the results are effectively concatenated.
5130 For a list whose car is an integer, the cdr of the list is processed
5131 and padded (if the number is positive) or truncated (if negative)
5132 to the width specified by that number.
5133 A string is printed verbatim in the mode line except for %-constructs:
5134 (%-constructs are allowed when the string is the entire mode-line-format
5135 or when it is found in a cons-cell or a list)
5136 %b -- print buffer name. %f -- print visited file name.
5137 %F -- print frame name.
5138 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5139 %& is like %*, but ignore read-only-ness.
5140 % means buffer is read-only and * means it is modified.
5141 For a modified read-only buffer, %* gives % and %+ gives *.
5142 %s -- print process status. %l -- print the current line number.
5143 %c -- print the current column number (this makes editing slower).
5144 To make the column number update correctly in all cases,
5145 `column-number-mode' must be non-nil.
5146 %p -- print percent of buffer above top of window, or Top, Bot or All.
5147 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5148 or print Bottom or All.
5149 %m -- print the mode name.
5150 %n -- print Narrow if appropriate.
5151 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5152 %Z -- like %z, but including the end-of-line format.
5153 %[ -- print one [ for each recursive editing level. %] similar.
5154 %% -- print %. %- -- print infinitely many dashes.
5155 Decimal digits after the % specify field width to which to pad. */);
5157 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
5158 /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5159 nil here means use current buffer's major mode. */);
5161 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5162 make_number (Lisp_Symbol
)
5163 /* Symbol for current buffer's major mode. */);
5165 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5166 make_number (Lisp_String
)
5167 /* Pretty name of current buffer's major mode (a string). */);
5169 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
5170 /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5172 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5174 /* *Non-nil if searches and matches should ignore case. */);
5176 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5177 make_number (Lisp_Int
)
5178 /* *Column beyond which automatic line-wrapping should happen. */);
5180 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5181 make_number (Lisp_Int
)
5182 /* *Column for the default indent-line-function to indent to.
5183 Linefeed indents to this column in Fundamental mode. */);
5185 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5186 make_number (Lisp_Int
)
5187 /* *Distance between tab stops (for display of tab characters), in columns. */);
5189 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
5190 /* *Non-nil means display control chars with uparrow.
5191 A value of nil means use backslash and octal digits.
5192 This variable does not apply to characters whose display is specified
5193 in the current display table (if there is one). */);
5195 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5196 ¤t_buffer
->enable_multibyte_characters
,
5198 /* Non-nil means the buffer contents are regarded as multi-byte characters.
5199 Otherwise they are regarded as unibyte. This affects the display,
5200 file I/O and the behavior of various editing commands.
5202 This variable is buffer-local but you cannot set it directly;
5203 use the function `set-buffer-multibyte' to change a buffer's representation.
5204 Changing its default value with `setq-default' is supported.
5205 See also variable `default-enable-multibyte-characters' and Info node
5206 `(elisp)Text Representations'. */);
5208 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5209 ¤t_buffer
->buffer_file_coding_system
, Qnil
5210 /* Coding system to be used for encoding the buffer contents on saving.
5211 This variable applies to saving the buffer, and also to `write-region'
5212 and other functions that use `write-region'.
5213 It does not apply to sending output to subprocesses, however.
5215 If this is nil, the buffer is saved without any code conversion
5216 unless some coding system is specified in `file-coding-system-alist'
5217 for the buffer file.
5219 The variable `coding-system-for-write', if non-nil, overrides this variable.
5221 This variable is never applied to a way of decoding a file while reading it. */);
5223 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5225 /* *Non-nil means lines in the buffer are displayed right to left. */);
5227 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
5228 /* *Non-nil means do not display continuation lines;
5229 give each line of text one screen line.
5231 Note that this is overridden by the variable
5232 `truncate-partial-width-windows' if that variable is non-nil
5233 and this buffer is not full-frame width. */);
5236 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5238 /* Non-nil if the visited file is a binary file.
5239 This variable is meaningful on MS-DOG and Windows NT.
5240 On those systems, it is automatically local in every buffer.
5241 On other systems, this variable is normally always nil. */);
5244 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5245 make_number (Lisp_String
)
5246 /* Name of default directory of current buffer. Should end with slash.
5247 To interactively change the default directory, use command `cd'. */);
5249 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5251 /* Function called (if non-nil) to perform auto-fill.
5252 It is called after self-inserting any character specified in
5253 the `auto-fill-chars' table.
5254 NOTE: This variable is not a hook;
5255 its value may not be a list of functions. */);
5257 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5258 make_number (Lisp_String
)
5259 /* Name of file visited in current buffer, or nil if not visiting a file. */);
5261 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5262 make_number (Lisp_String
)
5263 /* Abbreviated truename of file visited in current buffer, or nil if none.
5264 The truename of a file is calculated by `file-truename'
5265 and then abbreviated with `abbreviate-file-name'. */);
5267 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5268 ¤t_buffer
->auto_save_file_name
,
5269 make_number (Lisp_String
)
5270 /* Name of file for auto-saving current buffer,
5271 or nil if buffer should not be auto-saved. */);
5273 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
5274 /* Non-nil if this buffer is read-only. */);
5276 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
5277 /* Non-nil if this buffer's file has been backed up.
5278 Backing up is done before the first time the file is saved. */);
5280 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5281 make_number (Lisp_Int
)
5282 /* Length of current buffer when last read in, saved or auto-saved.
5285 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5287 /* Non-nil enables selective display:
5288 Integer N as value means display only lines
5289 that start with less than n columns of space.
5290 A value of t means, after a ^M, all the rest of the line is invisible.
5291 Then ^M's in the file are written into files as newlines. */);
5294 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5295 ¤t_buffer
->selective_display_ellipses
,
5297 /* t means display ... on previous line when a line is invisible. */);
5300 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
5301 /* Non-nil if self-insertion should replace existing text.
5302 The value should be one of `overwrite-mode-textual',
5303 `overwrite-mode-binary', or nil.
5304 If it is `overwrite-mode-textual', self-insertion still
5305 inserts at the end of a line, and inserts when point is before a tab,
5306 until the tab is filled in.
5307 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5309 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5311 /* Display table that controls display of the contents of current buffer.
5313 If this variable is nil, the value of `standard-display-table' is used.
5314 Each window can have its own, overriding display table, see
5315 `set-window-display-table' and `window-display-table'.
5317 The display table is a char-table created with `make-display-table'.
5318 A char-table is an array indexed by character codes. Normal array
5319 primitives `aref' and `aset' can be used to access elements of a char-table.
5321 Each of the char-table elements control how to display the corresponding
5322 text character: the element at index C in the table says how to display
5323 the character whose code is C. Each element should be a vector of
5324 characters or nil. nil means display the character in the default fashion;
5325 otherwise, the characters from the vector are delivered to the screen
5326 instead of the original character.
5328 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5329 a capital Y instead of each X character.
5331 In addition, a char-table has six extra slots to control the display of:
5333 the end of a truncated screen line (extra-slot 0, a single character);
5334 the end of a continued line (extra-slot 1, a single character);
5335 the escape character used to display character codes in octal
5336 (extra-slot 2, a single character);
5337 the character used as an arrow for control characters (extra-slot 3,
5338 a single character);
5339 the decoration indicating the presence of invisible lines (extra-slot 4,
5340 a vector of characters);
5341 the character used to draw the border between side-by-side windows
5342 (extra-slot 5, a single character).
5344 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5346 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_width
,
5348 /* *Width of left marginal area for display of a buffer.
5349 A value of nil means no marginal area. */);
5351 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_width
,
5353 /* *Width of right marginal area for display of a buffer.
5354 A value of nil means no marginal area. */);
5356 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5357 ¤t_buffer
->indicate_empty_lines
, Qnil
5358 /* *Visually indicate empty lines after the buffer end.
5359 If non-nil, a bitmap is displayed in the left fringe of a window on
5360 window-systems. */);
5362 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5363 ¤t_buffer
->scroll_up_aggressively
, Qnil
5364 /* *If a number, scroll display up aggressively.
5365 If scrolling a window because point is above the window start, choose
5366 a new window start so that point ends up that fraction of the window's
5367 height from the top of the window. */);
5369 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5370 ¤t_buffer
->scroll_down_aggressively
, Qnil
5371 /* *If a number, scroll display down aggressively.
5372 If scrolling a window because point is below the window end, choose
5373 a new window start so that point ends up that fraction of the window's
5374 height from the bottom of the window. */);
5376 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5380 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
5381 /* List of functions to call before each text change.
5382 Two arguments are passed to each function: the positions of
5383 the beginning and end of the range of old text to be changed.
5384 \(For an insertion, the beginning and end are at the same place.)
5385 No information is given about the length of the text after the change.
5387 Buffer changes made while executing the `before-change-functions'
5388 don't call any before-change or after-change functions.
5389 That's because these variables are temporarily set to nil.
5390 As a result, a hook function cannot straightforwardly alter the value of
5391 these variables. See the Emacs Lisp manual for a way of
5392 accomplishing an equivalent result by using other variables.
5394 If an unhandled error happens in running these functions,
5395 the variable's value remains nil. That prevents the error
5396 from happening repeatedly and making Emacs nonfunctional. */);
5397 Vbefore_change_functions
= Qnil
;
5399 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
5400 /* List of function to call after each text change.
5401 Three arguments are passed to each function: the positions of
5402 the beginning and end of the range of changed text,
5403 and the length in bytes of the pre-change text replaced by that range.
5404 \(For an insertion, the pre-change length is zero;
5405 for a deletion, that length is the number of bytes deleted,
5406 and the post-change beginning and end are at the same place.)
5408 Buffer changes made while executing the `after-change-functions'
5409 don't call any before-change or after-change functions.
5410 That's because these variables are temporarily set to nil.
5411 As a result, a hook function cannot straightforwardly alter the value of
5412 these variables. See the Emacs Lisp manual for a way of
5413 accomplishing an equivalent result by using other variables.
5415 If an unhandled error happens in running these functions,
5416 the variable's value remains nil. That prevents the error
5417 from happening repeatedly and making Emacs nonfunctional. */);
5418 Vafter_change_functions
= Qnil
;
5420 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
5421 /* A list of functions to call before changing a buffer which is unmodified.
5422 The functions are run using the `run-hooks' function. */);
5423 Vfirst_change_hook
= Qnil
;
5425 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
5426 /* List of undo entries in current buffer.
5427 Recent changes come first; older changes follow newer.
5429 An entry (BEG . END) represents an insertion which begins at
5430 position BEG and ends at position END.
5432 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5433 from (abs POSITION). If POSITION is positive, point was at the front
5434 of the text being deleted; if negative, point was at the end.
5436 An entry (t HIGH . LOW) indicates that the buffer previously had
5437 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5438 of the visited file's modification time, as of that time. If the
5439 modification time of the most recent save is different, this entry is
5442 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5443 was modified between BEG and END. PROPERTY is the property name,
5444 and VALUE is the old value.
5446 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5447 was adjusted in position by the offset DISTANCE (an integer).
5449 An entry of the form POSITION indicates that point was at the buffer
5450 location given by the integer. Undoing an entry of this form places
5453 nil marks undo boundaries. The undo command treats the changes
5454 between two undo boundaries as a single step to be undone.
5456 If the value of the variable is t, undo information is not recorded. */);
5458 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
5459 /* Non-nil means the mark and region are currently active in this buffer. */);
5461 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
5462 /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5464 Normally, the line-motion functions work by scanning the buffer for
5465 newlines. Columnar operations (like move-to-column and
5466 compute-motion) also work by scanning the buffer, summing character
5467 widths as they go. This works well for ordinary text, but if the
5468 buffer's lines are very long (say, more than 500 characters), these
5469 motion functions will take longer to execute. Emacs may also take
5470 longer to update the display.
5472 If cache-long-line-scans is non-nil, these motion functions cache the
5473 results of their scans, and consult the cache to avoid rescanning
5474 regions of the buffer until the text is modified. The caches are most
5475 beneficial when they prevent the most searching---that is, when the
5476 buffer contains long lines and large regions of characters with the
5477 same, fixed screen width.
5479 When cache-long-line-scans is non-nil, processing short lines will
5480 become slightly slower (because of the overhead of consulting the
5481 cache), and the caches will use memory roughly proportional to the
5482 number of newlines and characters whose screen width varies.
5484 The caches require no explicit maintenance; their accuracy is
5485 maintained internally by the Emacs primitives. Enabling or disabling
5486 the cache should not affect the behavior of any of the motion
5487 functions; it should only affect their performance. */);
5489 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
5490 /* Value of point before the last series of scroll operations, or nil. */);
5492 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
5493 /* List of formats to use when saving this buffer.
5494 Formats are defined by `format-alist'. This variable is
5495 set when a file is visited. Automatically local in all buffers. */);
5497 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5498 ¤t_buffer
->invisibility_spec
, Qnil
5499 /* Invisibility spec of this buffer.
5500 The default is t, which means that text is invisible
5501 if it has a non-nil `invisible' property.
5502 If the value is a list, a text character is invisible if its `invisible'
5503 property is an element in that list.
5504 If an element is a cons cell of the form (PROP . ELLIPSIS),
5505 then characters with property value PROP are invisible,
5506 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5508 DEFVAR_PER_BUFFER ("buffer-display-count",
5509 ¤t_buffer
->display_count
, Qnil
5510 /* A number incremented each time this buffer is displayed in a window.
5511 The function `set-window-buffer' increments it. */);
5513 DEFVAR_PER_BUFFER ("buffer-display-time",
5514 ¤t_buffer
->display_time
, Qnil
5515 /* Time stamp updated each time this buffer is displayed in a window.
5516 The function `set-window-buffer' updates this variable
5517 to the value obtained by calling `current-time'.
5518 If the buffer has never been shown in a window, the value is nil. */);
5520 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
5521 /* *Non-nil means deactivate the mark when the buffer contents change.
5522 Non-nil also enables highlighting of the region whenever the mark is active.
5523 The variable `highlight-nonselected-windows' controls whether to highlight
5524 all windows or just the selected window. */);
5525 Vtransient_mark_mode
= Qnil
;
5527 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
5528 /* *Non-nil means disregard read-only status of buffers or characters.
5529 If the value is t, disregard `buffer-read-only' and all `read-only'
5530 text properties. If the value is a list, disregard `buffer-read-only'
5531 and disregard a `read-only' text property if the property value
5532 is a member of the list. */);
5533 Vinhibit_read_only
= Qnil
;
5535 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
5536 /* Cursor to use in window displaying this buffer.
5537 Values are interpreted as follows:
5539 t use the cursor specified for the frame
5540 nil don't display a cursor
5541 `bar' display a bar cursor with default width
5542 (bar . WIDTH) display a bar cursor with width WIDTH
5543 others display a box cursor. */);
5545 DEFVAR_PER_BUFFER ("line-spacing",
5546 ¤t_buffer
->extra_line_spacing
, Qnil
5547 /* Additional space to put between lines when displaying a buffer.
5548 The space is measured in pixels, and put below lines on window systems. */);
5550 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
5551 /* List of functions called with no args to query before killing a buffer. */);
5552 Vkill_buffer_query_functions
= Qnil
;
5554 defsubr (&Sbuffer_live_p
);
5555 defsubr (&Sbuffer_list
);
5556 defsubr (&Sget_buffer
);
5557 defsubr (&Sget_file_buffer
);
5558 defsubr (&Sget_buffer_create
);
5559 defsubr (&Smake_indirect_buffer
);
5560 defsubr (&Sgenerate_new_buffer_name
);
5561 defsubr (&Sbuffer_name
);
5562 /*defsubr (&Sbuffer_number);*/
5563 defsubr (&Sbuffer_file_name
);
5564 defsubr (&Sbuffer_base_buffer
);
5565 defsubr (&Sbuffer_local_variables
);
5566 defsubr (&Sbuffer_modified_p
);
5567 defsubr (&Sset_buffer_modified_p
);
5568 defsubr (&Sbuffer_modified_tick
);
5569 defsubr (&Srename_buffer
);
5570 defsubr (&Sother_buffer
);
5571 defsubr (&Sbuffer_disable_undo
);
5572 defsubr (&Sbuffer_enable_undo
);
5573 defsubr (&Skill_buffer
);
5574 defsubr (&Sset_buffer_major_mode
);
5575 defsubr (&Sswitch_to_buffer
);
5576 defsubr (&Spop_to_buffer
);
5577 defsubr (&Scurrent_buffer
);
5578 defsubr (&Sset_buffer
);
5579 defsubr (&Sbarf_if_buffer_read_only
);
5580 defsubr (&Sbury_buffer
);
5581 defsubr (&Serase_buffer
);
5582 defsubr (&Sset_buffer_multibyte
);
5583 defsubr (&Skill_all_local_variables
);
5585 defsubr (&Soverlayp
);
5586 defsubr (&Smake_overlay
);
5587 defsubr (&Sdelete_overlay
);
5588 defsubr (&Smove_overlay
);
5589 defsubr (&Soverlay_start
);
5590 defsubr (&Soverlay_end
);
5591 defsubr (&Soverlay_buffer
);
5592 defsubr (&Soverlay_properties
);
5593 defsubr (&Soverlays_at
);
5594 defsubr (&Soverlays_in
);
5595 defsubr (&Snext_overlay_change
);
5596 defsubr (&Sprevious_overlay_change
);
5597 defsubr (&Soverlay_recenter
);
5598 defsubr (&Soverlay_lists
);
5599 defsubr (&Soverlay_get
);
5600 defsubr (&Soverlay_put
);
5601 defsubr (&Srestore_buffer_modified_p
);
5607 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
5608 initial_define_key (control_x_map
, 'k', "kill-buffer");
5610 /* This must not be in syms_of_buffer, because Qdisabled is not
5611 initialized when that function gets called. */
5612 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);