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 */
44 #include "intervals.h"
49 #include "region-cache.h"
51 #include "blockinput.h"
56 struct buffer
*current_buffer
; /* the current buffer */
58 /* First buffer in chain of all buffers (in reverse order of creation).
59 Threaded through ->next. */
61 struct buffer
*all_buffers
;
63 /* This structure holds the default values of the buffer-local variables
64 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
65 The default value occupies the same slot in this structure
66 as an individual buffer's value occupies in that buffer.
67 Setting the default value also goes through the alist of buffers
68 and stores into each buffer that does not say it has a local value. */
70 struct buffer buffer_defaults
;
72 /* A Lisp_Object pointer to the above, used for staticpro */
74 static Lisp_Object Vbuffer_defaults
;
76 /* This structure marks which slots in a buffer have corresponding
77 default values in buffer_defaults.
78 Each such slot has a nonzero value in this structure.
79 The value has only one nonzero bit.
81 When a buffer has its own local value for a slot,
82 the entry for that slot (found in the same slot in this structure)
83 is turned on in the buffer's local_flags array.
85 If a slot in this structure is -1, then even though there may
86 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
87 and the corresponding slot in buffer_defaults is not used.
89 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
90 but there is a default value which is copied into each buffer.
92 If a slot in this structure is negative, then even though there may
93 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
94 and the corresponding slot in buffer_defaults is not used.
96 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
97 zero, that is a bug */
99 struct buffer buffer_local_flags
;
101 /* This structure holds the names of symbols whose values may be
102 buffer-local. It is indexed and accessed in the same way as the above. */
104 struct buffer buffer_local_symbols
;
105 /* A Lisp_Object pointer to the above, used for staticpro */
106 static Lisp_Object Vbuffer_local_symbols
;
108 /* This structure holds the required types for the values in the
109 buffer-local slots. If a slot contains Qnil, then the
110 corresponding buffer slot may contain a value of any type. If a
111 slot contains an integer, then prospective values' tags must be
112 equal to that integer (except nil is always allowed).
113 When a tag does not match, the function
114 buffer_slot_type_mismatch will signal an error.
116 If a slot here contains -1, the corresponding variable is read-only. */
117 struct buffer buffer_local_types
;
119 /* Flags indicating which built-in buffer-local variables
120 are permanent locals. */
121 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
123 /* Number of per-buffer variables used. */
125 int last_per_buffer_idx
;
127 Lisp_Object
Fset_buffer ();
128 void set_buffer_internal ();
129 void set_buffer_internal_1 ();
130 static void call_overlay_mod_hooks ();
131 static void swap_out_buffer_local_variables ();
132 static void reset_buffer_local_variables ();
134 /* Alist of all buffer names vs the buffers. */
135 /* This used to be a variable, but is no longer,
136 to prevent lossage due to user rplac'ing this alist or its elements. */
137 Lisp_Object Vbuffer_alist
;
139 /* Functions to call before and after each text change. */
140 Lisp_Object Vbefore_change_functions
;
141 Lisp_Object Vafter_change_functions
;
143 Lisp_Object Vtransient_mark_mode
;
145 /* t means ignore all read-only text properties.
146 A list means ignore such a property if its value is a member of the list.
147 Any non-nil value means ignore buffer-read-only. */
148 Lisp_Object Vinhibit_read_only
;
150 /* List of functions to call that can query about killing a buffer.
151 If any of these functions returns nil, we don't kill it. */
152 Lisp_Object Vkill_buffer_query_functions
;
154 /* List of functions to call before changing an unmodified buffer. */
155 Lisp_Object Vfirst_change_hook
;
157 Lisp_Object Qfirst_change_hook
;
158 Lisp_Object Qbefore_change_functions
;
159 Lisp_Object Qafter_change_functions
;
161 /* If nonzero, all modification hooks are suppressed. */
162 int inhibit_modification_hooks
;
164 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
166 Lisp_Object Qprotected_field
;
168 Lisp_Object QSFundamental
; /* A string "Fundamental" */
170 Lisp_Object Qkill_buffer_hook
;
172 Lisp_Object Qget_file_buffer
;
174 Lisp_Object Qoverlayp
;
176 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
178 Lisp_Object Qmodification_hooks
;
179 Lisp_Object Qinsert_in_front_hooks
;
180 Lisp_Object Qinsert_behind_hooks
;
182 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
183 static void free_buffer_text
P_ ((struct buffer
*b
));
184 static Lisp_Object copy_overlays
P_ ((struct buffer
*, Lisp_Object
));
185 static void modify_overlay
P_ ((struct buffer
*, int, int));
188 /* For debugging; temporary. See set_buffer_internal. */
189 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
196 error ("No buffer named %s", XSTRING (spec
)->data
);
197 error ("Invalid buffer argument");
200 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
201 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
202 Value is nil if OBJECT is not a buffer or if it has been killed. */)
206 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
210 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
211 doc
: /* Return a list of all existing live buffers.
212 If the optional arg FRAME is a frame, we return that frame's buffer list. */)
216 Lisp_Object framelist
, general
;
217 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
225 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
227 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
229 while (! NILP (tail
))
231 general
= Fdelq (XCAR (tail
), general
);
234 return nconc2 (framelist
, general
);
240 /* Like Fassoc, but use Fstring_equal to compare
241 (which ignores text properties),
242 and don't ever QUIT. */
245 assoc_ignore_text_properties (key
, list
)
246 register Lisp_Object key
;
249 register Lisp_Object tail
;
250 for (tail
= list
; !NILP (tail
); tail
= Fcdr (tail
))
252 register Lisp_Object elt
, tem
;
254 tem
= Fstring_equal (Fcar (elt
), key
);
261 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
262 doc
: /* Return the buffer named NAME (a string).
263 If there is no live buffer named NAME, return nil.
264 NAME may also be a buffer; if so, the value is that buffer. */)
266 register Lisp_Object name
;
272 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
275 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
276 doc
: /* Return the buffer visiting file FILENAME (a string).
277 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
278 If there is no such live buffer, return nil.
279 See also `find-buffer-visiting'. */)
281 register Lisp_Object filename
;
283 register Lisp_Object tail
, buf
, tem
;
286 CHECK_STRING (filename
);
287 filename
= Fexpand_file_name (filename
, Qnil
);
289 /* If the file name has special constructs in it,
290 call the corresponding file handler. */
291 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
293 return call2 (handler
, Qget_file_buffer
, filename
);
295 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
297 buf
= Fcdr (XCAR (tail
));
298 if (!BUFFERP (buf
)) continue;
299 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
300 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
308 get_truename_buffer (filename
)
309 register Lisp_Object filename
;
311 register Lisp_Object tail
, buf
, tem
;
313 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
315 buf
= Fcdr (XCAR (tail
));
316 if (!BUFFERP (buf
)) continue;
317 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
318 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
325 /* Incremented for each buffer created, to assign the buffer number. */
328 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
329 doc
: /* Return the buffer named NAME, or create such a buffer and return it.
330 A new buffer is created if there is no live buffer named NAME.
331 If NAME starts with a space, the new buffer does not keep undo information.
332 If NAME is a buffer instead of a string, then it is the value returned.
333 The value is never nil. */)
335 register Lisp_Object name
;
337 register Lisp_Object buf
;
338 register struct buffer
*b
;
340 buf
= Fget_buffer (name
);
344 if (XSTRING (name
)->size
== 0)
345 error ("Empty string for buffer name is not allowed");
347 b
= (struct buffer
*) allocate_buffer ();
349 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
351 /* An ordinary buffer uses its own struct buffer_text. */
352 b
->text
= &b
->own_text
;
355 BUF_GAP_SIZE (b
) = 20;
357 /* We allocate extra 1-byte at the tail and keep it always '\0' for
358 anchoring a search. */
359 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
361 if (! BUF_BEG_ADDR (b
))
362 buffer_memory_full ();
370 BUF_GPT_BYTE (b
) = 1;
371 BUF_BEGV_BYTE (b
) = 1;
375 BUF_OVERLAY_MODIFF (b
) = 1;
376 BUF_SAVE_MODIFF (b
) = 1;
377 BUF_INTERVALS (b
) = 0;
378 BUF_UNCHANGED_MODIFIED (b
) = 1;
379 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
380 BUF_END_UNCHANGED (b
) = 0;
381 BUF_BEG_UNCHANGED (b
) = 0;
382 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
384 b
->newline_cache
= 0;
385 b
->width_run_cache
= 0;
386 b
->width_table
= Qnil
;
387 b
->prevent_redisplay_optimizations_p
= 1;
389 /* Put this on the chain of all buffers including killed ones. */
390 b
->next
= all_buffers
;
393 /* An ordinary buffer normally doesn't need markers
394 to handle BEGV and ZV. */
396 b
->begv_marker
= Qnil
;
399 name
= Fcopy_sequence (name
);
400 XSTRING (name
)->intervals
= NULL_INTERVAL
;
403 if (XSTRING (name
)->data
[0] != ' ')
409 reset_buffer_local_variables (b
, 1);
411 /* Put this in the alist of all live buffers. */
413 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
415 b
->mark
= Fmake_marker ();
416 BUF_MARKERS (b
) = Qnil
;
422 /* Return a list of overlays which is a copy of the overlay list
423 LIST, but for buffer B. */
426 copy_overlays (b
, list
)
430 Lisp_Object result
, buffer
;
432 XSETBUFFER (buffer
, b
);
434 for (result
= Qnil
; CONSP (list
); list
= XCDR (list
))
436 Lisp_Object overlay
, start
, end
, old_overlay
;
439 old_overlay
= XCAR (list
);
440 charpos
= marker_position (OVERLAY_START (old_overlay
));
441 start
= Fmake_marker ();
442 Fset_marker (start
, make_number (charpos
), buffer
);
443 XMARKER (start
)->insertion_type
444 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
446 charpos
= marker_position (OVERLAY_END (old_overlay
));
447 end
= Fmake_marker ();
448 Fset_marker (end
, make_number (charpos
), buffer
);
449 XMARKER (end
)->insertion_type
450 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
452 overlay
= allocate_misc ();
453 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
454 OVERLAY_START (overlay
) = start
;
455 OVERLAY_END (overlay
) = end
;
456 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
458 result
= Fcons (overlay
, result
);
461 return Fnreverse (result
);
465 /* Clone per-buffer values of buffer FROM.
467 Buffer TO gets the same per-buffer values as FROM, with the
468 following exceptions: (1) TO's name is left untouched, (2) markers
469 are copied and made to refer to TO, and (3) overlay lists are
473 clone_per_buffer_values (from
, to
)
474 struct buffer
*from
, *to
;
476 Lisp_Object to_buffer
;
479 XSETBUFFER (to_buffer
, to
);
481 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
483 offset
+= sizeof (Lisp_Object
))
487 obj
= PER_BUFFER_VALUE (from
, offset
);
490 struct Lisp_Marker
*m
= XMARKER (obj
);
491 obj
= Fmake_marker ();
492 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
493 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
496 PER_BUFFER_VALUE (to
, offset
) = obj
;
499 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
501 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
502 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
506 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
508 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
509 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
510 BASE-BUFFER should be an existing buffer (or buffer name).
511 NAME should be a string which is not the name of an existing buffer.
512 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
513 such as major and minor modes, in the indirect buffer.
514 CLONE nil means the indirect buffer's state is reset to default values. */)
515 (base_buffer
, name
, clone
)
516 Lisp_Object base_buffer
, name
, clone
;
521 buf
= Fget_buffer (name
);
523 error ("Buffer name `%s' is in use", XSTRING (name
)->data
);
525 base_buffer
= Fget_buffer (base_buffer
);
526 if (NILP (base_buffer
))
527 error ("No such buffer: `%s'", XSTRING (name
)->data
);
529 if (XSTRING (name
)->size
== 0)
530 error ("Empty string for buffer name is not allowed");
532 b
= (struct buffer
*) allocate_buffer ();
533 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
535 if (XBUFFER (base_buffer
)->base_buffer
)
536 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
538 b
->base_buffer
= XBUFFER (base_buffer
);
540 /* Use the base buffer's text object. */
541 b
->text
= b
->base_buffer
->text
;
543 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
544 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
545 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
546 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
547 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
548 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
550 b
->newline_cache
= 0;
551 b
->width_run_cache
= 0;
552 b
->width_table
= Qnil
;
554 /* Put this on the chain of all buffers including killed ones. */
555 b
->next
= all_buffers
;
558 name
= Fcopy_sequence (name
);
559 XSTRING (name
)->intervals
= NULL_INTERVAL
;
563 reset_buffer_local_variables (b
, 1);
565 /* Put this in the alist of all live buffers. */
567 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
569 b
->mark
= Fmake_marker ();
572 /* The multibyte status belongs to the base buffer. */
573 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
575 /* Make sure the base buffer has markers for its narrowing. */
576 if (NILP (b
->base_buffer
->pt_marker
))
578 b
->base_buffer
->pt_marker
= Fmake_marker ();
579 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
580 BUF_PT (b
->base_buffer
),
581 BUF_PT_BYTE (b
->base_buffer
));
583 if (NILP (b
->base_buffer
->begv_marker
))
585 b
->base_buffer
->begv_marker
= Fmake_marker ();
586 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
587 BUF_BEGV (b
->base_buffer
),
588 BUF_BEGV_BYTE (b
->base_buffer
));
590 if (NILP (b
->base_buffer
->zv_marker
))
592 b
->base_buffer
->zv_marker
= Fmake_marker ();
593 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
594 BUF_ZV (b
->base_buffer
),
595 BUF_ZV_BYTE (b
->base_buffer
));
596 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
601 /* Give the indirect buffer markers for its narrowing. */
602 b
->pt_marker
= Fmake_marker ();
603 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
604 b
->begv_marker
= Fmake_marker ();
605 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
606 b
->zv_marker
= Fmake_marker ();
607 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
608 XMARKER (b
->zv_marker
)->insertion_type
= 1;
611 clone_per_buffer_values (b
->base_buffer
, b
);
616 /* Reinitialize everything about a buffer except its name and contents
617 and local variables. */
621 register struct buffer
*b
;
624 b
->file_truename
= Qnil
;
625 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
627 XSETFASTINT (b
->save_length
, 0);
628 b
->last_window_start
= 1;
629 /* It is more conservative to start out "changed" than "unchanged". */
631 b
->prevent_redisplay_optimizations_p
= 1;
633 b
->auto_save_modified
= 0;
634 b
->auto_save_failure_time
= -1;
635 b
->auto_save_file_name
= Qnil
;
637 b
->overlays_before
= Qnil
;
638 b
->overlays_after
= Qnil
;
639 XSETFASTINT (b
->overlay_center
, 1);
640 b
->mark_active
= Qnil
;
641 b
->point_before_scroll
= Qnil
;
642 b
->file_format
= Qnil
;
643 b
->last_selected_window
= Qnil
;
644 XSETINT (b
->display_count
, 0);
645 b
->display_time
= Qnil
;
646 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
647 b
->cursor_type
= buffer_defaults
.cursor_type
;
648 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
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 doc
: /* 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
;
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 doc
: /* 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
);
772 return XBUFFER (buffer
)->name
;
775 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
776 doc
: /* 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
);
784 return XBUFFER (buffer
)->filename
;
787 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
789 doc
: /* 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
);
802 base
= XBUFFER (buffer
)->base_buffer
;
807 XSETBUFFER (base_buffer
, base
);
811 DEFUN ("buffer-local-value", Fbuffer_local_value
,
812 Sbuffer_local_value
, 2, 2, 0,
813 doc
: /* Return the value of VARIABLE in BUFFER.
814 If VARIABLE does not have a buffer-local binding in BUFFER, the value
815 is the default binding of variable. */)
817 register Lisp_Object symbol
;
818 register Lisp_Object buffer
;
820 register struct buffer
*buf
;
821 register Lisp_Object result
;
823 CHECK_SYMBOL (symbol
);
824 CHECK_BUFFER (buffer
);
825 buf
= XBUFFER (buffer
);
827 /* Look in local_var_list */
828 result
= Fassoc (symbol
, buf
->local_var_alist
);
834 /* Look in special slots */
835 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
836 offset
< sizeof (struct buffer
);
837 /* sizeof EMACS_INT == sizeof Lisp_Object */
838 offset
+= (sizeof (EMACS_INT
)))
840 idx
= PER_BUFFER_IDX (offset
);
841 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
842 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
843 && EQ (PER_BUFFER_SYMBOL (offset
), symbol
))
845 result
= PER_BUFFER_VALUE (buf
, offset
);
852 result
= Fdefault_value (symbol
);
855 result
= XCDR (result
);
857 if (EQ (result
, Qunbound
))
858 return Fsignal (Qvoid_variable
, Fcons (symbol
, Qnil
));
863 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
864 Sbuffer_local_variables
, 0, 1, 0,
865 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
866 Most elements look like (SYMBOL . VALUE), describing one variable.
867 For a symbol that is locally unbound, just the symbol appears in the value.
868 Note that storing new VALUEs in these elements doesn't change the variables.
869 No argument or nil as argument means use current buffer as BUFFER. */)
871 register Lisp_Object buffer
;
873 register struct buffer
*buf
;
874 register Lisp_Object result
;
877 buf
= current_buffer
;
880 CHECK_BUFFER (buffer
);
881 buf
= XBUFFER (buffer
);
887 register Lisp_Object tail
;
888 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
890 Lisp_Object val
, elt
;
894 /* Reference each variable in the alist in buf.
895 If inquiring about the current buffer, this gets the current values,
896 so store them into the alist so the alist is up to date.
897 If inquiring about some other buffer, this swaps out any values
898 for that buffer, making the alist up to date automatically. */
899 val
= find_symbol_value (XCAR (elt
));
900 /* Use the current buffer value only if buf is the current buffer. */
901 if (buf
!= current_buffer
)
904 /* If symbol is unbound, put just the symbol in the list. */
905 if (EQ (val
, Qunbound
))
906 result
= Fcons (XCAR (elt
), result
);
907 /* Otherwise, put (symbol . value) in the list. */
909 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
913 /* Add on all the variables stored in special slots. */
917 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
918 offset
< sizeof (struct buffer
);
919 /* sizeof EMACS_INT == sizeof Lisp_Object */
920 offset
+= (sizeof (EMACS_INT
)))
922 idx
= PER_BUFFER_IDX (offset
);
923 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
924 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
925 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
926 PER_BUFFER_VALUE (buf
, offset
)),
935 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
937 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
938 No argument or nil as argument means use current buffer as BUFFER. */)
940 register Lisp_Object buffer
;
942 register struct buffer
*buf
;
944 buf
= current_buffer
;
947 CHECK_BUFFER (buffer
);
948 buf
= XBUFFER (buffer
);
951 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
954 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
956 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
957 A non-nil FLAG means mark the buffer modified. */)
959 register Lisp_Object flag
;
961 register int already
;
962 register Lisp_Object fn
;
963 Lisp_Object buffer
, window
;
965 #ifdef CLASH_DETECTION
966 /* If buffer becoming modified, lock the file.
967 If buffer becoming unmodified, unlock the file. */
969 fn
= current_buffer
->file_truename
;
970 /* Test buffer-file-name so that binding it to nil is effective. */
971 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
973 already
= SAVE_MODIFF
< MODIFF
;
974 if (!already
&& !NILP (flag
))
976 else if (already
&& NILP (flag
))
979 #endif /* CLASH_DETECTION */
981 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
983 /* Set update_mode_lines only if buffer is displayed in some window.
984 Packages like jit-lock or lazy-lock preserve a buffer's modified
985 state by recording/restoring the state around blocks of code.
986 Setting update_mode_lines makes redisplay consider all windows
987 (on all frames). Stealth fontification of buffers not displayed
988 would incur additional redisplay costs if we'd set
989 update_modes_lines unconditionally.
991 Ideally, I think there should be another mechanism for fontifying
992 buffers without "modifying" buffers, or redisplay should be
993 smarter about updating the `*' in mode lines. --gerd */
994 XSETBUFFER (buffer
, current_buffer
);
995 window
= Fget_buffer_window (buffer
, Qt
);
996 if (WINDOWP (window
))
999 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1005 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1006 Srestore_buffer_modified_p
, 1, 1, 0,
1007 doc
: /* Like `set-buffer-modified-p', with a differences concerning redisplay.
1008 It is not ensured that mode lines will be updated to show the modified
1009 state of the current buffer. Use with care. */)
1013 #ifdef CLASH_DETECTION
1016 /* If buffer becoming modified, lock the file.
1017 If buffer becoming unmodified, unlock the file. */
1019 fn
= current_buffer
->file_truename
;
1020 /* Test buffer-file-name so that binding it to nil is effective. */
1021 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1023 int already
= SAVE_MODIFF
< MODIFF
;
1024 if (!already
&& !NILP (flag
))
1026 else if (already
&& NILP (flag
))
1029 #endif /* CLASH_DETECTION */
1031 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1035 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1037 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1038 Each buffer has a tick counter which is incremented each time the text in
1039 that buffer is changed. It wraps around occasionally.
1040 No argument or nil as argument means use current buffer as BUFFER. */)
1042 register Lisp_Object buffer
;
1044 register struct buffer
*buf
;
1046 buf
= current_buffer
;
1049 CHECK_BUFFER (buffer
);
1050 buf
= XBUFFER (buffer
);
1053 return make_number (BUF_MODIFF (buf
));
1056 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1057 "sRename buffer (to new name): \nP",
1058 doc
: /* Change current buffer's name to NEWNAME (a string).
1059 If second arg UNIQUE is nil or omitted, it is an error if a
1060 buffer named NEWNAME already exists.
1061 If UNIQUE is non-nil, come up with a new name using
1062 `generate-new-buffer-name'.
1063 Interactively, you can set UNIQUE with a prefix argument.
1064 We return the name we actually gave the buffer.
1065 This does not change the name of the visited file (if any). */)
1067 register Lisp_Object newname
, unique
;
1069 register Lisp_Object tem
, buf
;
1071 CHECK_STRING (newname
);
1073 if (XSTRING (newname
)->size
== 0)
1074 error ("Empty string is invalid as a buffer name");
1076 tem
= Fget_buffer (newname
);
1079 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1080 rename the buffer automatically so you can create another
1081 with the original name. It makes UNIQUE equivalent to
1082 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1083 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1084 return current_buffer
->name
;
1086 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1088 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
1091 current_buffer
->name
= newname
;
1093 /* Catch redisplay's attention. Unless we do this, the mode lines for
1094 any windows displaying current_buffer will stay unchanged. */
1095 update_mode_lines
++;
1097 XSETBUFFER (buf
, current_buffer
);
1098 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1099 if (NILP (current_buffer
->filename
)
1100 && !NILP (current_buffer
->auto_save_file_name
))
1101 call0 (intern ("rename-auto-save-file"));
1102 /* Refetch since that last call may have done GC. */
1103 return current_buffer
->name
;
1106 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1107 doc
: /* Return most recently selected buffer other than BUFFER.
1108 Buffers not visible in windows are preferred to visible buffers,
1109 unless optional second argument VISIBLE-OK is non-nil.
1110 If the optional third argument FRAME is non-nil, use that frame's
1111 buffer list instead of the selected frame's buffer list.
1112 If no other buffer exists, the buffer `*scratch*' is returned.
1113 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1114 (buffer
, visible_ok
, frame
)
1115 register Lisp_Object buffer
, visible_ok
, frame
;
1117 Lisp_Object
Fset_buffer_major_mode ();
1118 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1122 frame
= selected_frame
;
1124 tail
= Vbuffer_alist
;
1125 pred
= frame_buffer_predicate (frame
);
1127 /* Consider buffers that have been seen in the selected frame
1128 before other buffers. */
1130 tem
= frame_buffer_list (frame
);
1134 if (BUFFERP (XCAR (tem
)))
1135 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1138 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1140 for (; !NILP (tail
); tail
= Fcdr (tail
))
1142 buf
= Fcdr (Fcar (tail
));
1143 if (EQ (buf
, buffer
))
1145 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
1147 /* If the selected frame has a buffer_predicate,
1148 disregard buffers that don't fit the predicate. */
1151 tem
= call1 (pred
, buf
);
1156 if (NILP (visible_ok
))
1157 tem
= Fget_buffer_window (buf
, Qvisible
);
1162 if (NILP (notsogood
))
1165 if (!NILP (notsogood
))
1167 buf
= Fget_buffer (build_string ("*scratch*"));
1170 buf
= Fget_buffer_create (build_string ("*scratch*"));
1171 Fset_buffer_major_mode (buf
);
1176 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
1178 doc
: /* Make BUFFER stop keeping undo information.
1179 No argument or nil as argument means do this for the current buffer. */)
1181 register Lisp_Object buffer
;
1183 Lisp_Object real_buffer
;
1186 XSETBUFFER (real_buffer
, current_buffer
);
1189 real_buffer
= Fget_buffer (buffer
);
1190 if (NILP (real_buffer
))
1194 XBUFFER (real_buffer
)->undo_list
= Qt
;
1199 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1201 doc
: /* Start keeping undo information for buffer BUFFER.
1202 No argument or nil as argument means do this for the current buffer. */)
1204 register Lisp_Object buffer
;
1206 Lisp_Object real_buffer
;
1209 XSETBUFFER (real_buffer
, current_buffer
);
1212 real_buffer
= Fget_buffer (buffer
);
1213 if (NILP (real_buffer
))
1217 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1218 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1224 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1225 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1226 The buffer being killed will be current while the hook is running.\n\
1229 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1230 doc
: /* Kill the buffer BUFFER.
1231 The argument may be a buffer or may be the name of a buffer.
1232 An argument of nil means kill the current buffer.
1234 Value is t if the buffer is actually killed, nil if user says no.
1236 The value of `kill-buffer-hook' (which may be local to that buffer),
1237 if not void, is a list of functions to be called, with no arguments,
1238 before the buffer is actually killed. The buffer to be killed is current
1239 when the hook functions are called.
1241 Any processes that have this buffer as the `process-buffer' are killed
1247 register struct buffer
*b
;
1248 register Lisp_Object tem
;
1249 register struct Lisp_Marker
*m
;
1250 struct gcpro gcpro1
;
1253 buf
= Fcurrent_buffer ();
1255 buf
= Fget_buffer (buffer
);
1261 /* Avoid trouble for buffer already dead. */
1265 /* Query if the buffer is still modified. */
1266 if (INTERACTIVE
&& !NILP (b
->filename
)
1267 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1270 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
1271 XSTRING (b
->name
)->data
));
1277 /* Run hooks with the buffer to be killed the current buffer. */
1279 int count
= specpdl_ptr
- specpdl
;
1282 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1283 set_buffer_internal (b
);
1285 /* First run the query functions; if any query is answered no,
1286 don't kill the buffer. */
1287 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
1289 tem
= call0 (Fcar (list
));
1291 return unbind_to (count
, Qnil
);
1294 /* Then run the hooks. */
1295 if (!NILP (Vrun_hooks
))
1296 call1 (Vrun_hooks
, Qkill_buffer_hook
);
1297 unbind_to (count
, Qnil
);
1300 /* We have no more questions to ask. Verify that it is valid
1301 to kill the buffer. This must be done after the questions
1302 since anything can happen within do_yes_or_no_p. */
1304 /* Don't kill the minibuffer now current. */
1305 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1311 /* When we kill a base buffer, kill all its indirect buffers.
1312 We do it at this stage so nothing terrible happens if they
1313 ask questions or their hooks get errors. */
1314 if (! b
->base_buffer
)
1316 struct buffer
*other
;
1320 for (other
= all_buffers
; other
; other
= other
->next
)
1321 /* all_buffers contains dead buffers too;
1322 don't re-kill them. */
1323 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1326 XSETBUFFER (buf
, other
);
1333 /* Make this buffer not be current.
1334 In the process, notice if this is the sole visible buffer
1335 and give up if so. */
1336 if (b
== current_buffer
)
1338 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1340 if (b
== current_buffer
)
1344 /* Notice if the buffer to kill is the sole visible buffer
1345 when we're currently in the mini-buffer, and give up if so. */
1346 XSETBUFFER (tem
, current_buffer
);
1347 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1349 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1354 /* Now there is no question: we can kill the buffer. */
1356 #ifdef CLASH_DETECTION
1357 /* Unlock this buffer's file, if it is locked. */
1359 #endif /* CLASH_DETECTION */
1361 kill_buffer_processes (buf
);
1363 tem
= Vinhibit_quit
;
1365 replace_buffer_in_all_windows (buf
);
1366 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1367 frames_discard_buffer (buf
);
1368 Vinhibit_quit
= tem
;
1370 /* Delete any auto-save file, if we saved it in this session.
1371 But not if the buffer is modified. */
1372 if (STRINGP (b
->auto_save_file_name
)
1373 && b
->auto_save_modified
!= 0
1374 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1375 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
))
1378 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1380 internal_delete_file (b
->auto_save_file_name
);
1385 /* Unchain all markers that belong to this indirect buffer.
1386 Don't unchain the markers that belong to the base buffer
1387 or its other indirect buffers. */
1388 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1394 unchain_marker (tem
);
1400 /* Unchain all markers of this buffer and its indirect buffers.
1401 and leave them pointing nowhere. */
1402 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1409 BUF_MARKERS (b
) = Qnil
;
1410 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1412 /* Perhaps we should explicitly free the interval tree here... */
1415 /* Reset the local variables, so that this buffer's local values
1416 won't be protected from GC. They would be protected
1417 if they happened to remain encached in their symbols.
1418 This gets rid of them for certain. */
1419 swap_out_buffer_local_variables (b
);
1420 reset_buffer_local_variables (b
, 1);
1425 if (! b
->base_buffer
)
1426 free_buffer_text (b
);
1428 if (b
->newline_cache
)
1430 free_region_cache (b
->newline_cache
);
1431 b
->newline_cache
= 0;
1433 if (b
->width_run_cache
)
1435 free_region_cache (b
->width_run_cache
);
1436 b
->width_run_cache
= 0;
1438 b
->width_table
= Qnil
;
1440 b
->undo_list
= Qnil
;
1445 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1446 we do this each time BUF is selected visibly, the more recently
1447 selected buffers are always closer to the front of the list. This
1448 means that other_buffer is more likely to choose a relevant buffer. */
1454 register Lisp_Object link
, prev
;
1456 frame
= selected_frame
;
1459 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1461 if (EQ (XCDR (XCAR (link
)), buf
))
1466 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1467 we cannot use Fdelq itself here because it allows quitting. */
1470 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1472 XSETCDR (prev
, XCDR (XCDR (prev
)));
1474 XSETCDR (link
, Vbuffer_alist
);
1475 Vbuffer_alist
= link
;
1477 /* Now move this buffer to the front of frame_buffer_list also. */
1480 for (link
= frame_buffer_list (frame
); CONSP (link
);
1483 if (EQ (XCAR (link
), buf
))
1488 /* Effectively do delq. */
1493 set_frame_buffer_list (frame
,
1494 XCDR (frame_buffer_list (frame
)));
1496 XSETCDR (prev
, XCDR (XCDR (prev
)));
1498 XSETCDR (link
, frame_buffer_list (frame
));
1499 set_frame_buffer_list (frame
, link
);
1502 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1505 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1506 doc
: /* Set an appropriate major mode for BUFFER.
1507 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1508 according to `default-major-mode'.
1509 Use this function before selecting the buffer, since it may need to inspect
1510 the current buffer's major mode. */)
1515 Lisp_Object function
;
1517 if (STRINGP (XBUFFER (buffer
)->name
)
1518 && strcmp (XSTRING (XBUFFER (buffer
)->name
)->data
, "*scratch*") == 0)
1519 function
= find_symbol_value (intern ("initial-major-mode"));
1522 function
= buffer_defaults
.major_mode
;
1524 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1525 function
= current_buffer
->major_mode
;
1528 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1531 count
= specpdl_ptr
- specpdl
;
1533 /* To select a nonfundamental mode,
1534 select the buffer temporarily and then call the mode function. */
1536 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1538 Fset_buffer (buffer
);
1541 return unbind_to (count
, Qnil
);
1544 /* If switching buffers in WINDOW would be an error, return
1545 a C string saying what the error would be. */
1548 no_switch_window (window
)
1552 if (EQ (minibuf_window
, window
))
1553 return "Cannot switch buffers in minibuffer window";
1554 tem
= Fwindow_dedicated_p (window
);
1556 return "Cannot switch buffers in a dedicated window";
1560 /* Switch to buffer BUFFER in the selected window.
1561 If NORECORD is non-nil, don't call record_buffer. */
1564 switch_to_buffer_1 (buffer
, norecord
)
1565 Lisp_Object buffer
, norecord
;
1567 register Lisp_Object buf
;
1570 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1573 buf
= Fget_buffer (buffer
);
1576 buf
= Fget_buffer_create (buffer
);
1577 Fset_buffer_major_mode (buf
);
1581 if (NILP (norecord
))
1582 record_buffer (buf
);
1584 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1585 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1592 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1593 doc
: /* Select buffer BUFFER in the current window.
1594 BUFFER may be a buffer or a buffer name.
1595 Optional second arg NORECORD non-nil means
1596 do not put this buffer at the front of the list of recently selected ones.
1598 WARNING: This is NOT the way to work on another buffer temporarily
1599 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1600 the window-buffer correspondences. */)
1602 Lisp_Object buffer
, norecord
;
1606 err
= no_switch_window (selected_window
);
1607 if (err
) error (err
);
1609 return switch_to_buffer_1 (buffer
, norecord
);
1612 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1613 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1614 If BUFFER is nil, then some other buffer is chosen.
1615 If `pop-up-windows' is non-nil, windows can be split to do this.
1616 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1617 window even if BUFFER is already visible in the selected window.
1618 This uses the function `display-buffer' as a subroutine; see the documentation
1619 of `display-buffer' for additional customization information.
1621 Optional third arg NORECORD non-nil means
1622 do not put this buffer at the front of the list of recently selected ones. */)
1623 (buffer
, other_window
, norecord
)
1624 Lisp_Object buffer
, other_window
, norecord
;
1626 register Lisp_Object buf
;
1628 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1631 buf
= Fget_buffer (buffer
);
1634 buf
= Fget_buffer_create (buffer
);
1635 Fset_buffer_major_mode (buf
);
1639 if (NILP (norecord
))
1640 /* This seems bogus since Fselect_window will call record_buffer anyway. */
1641 record_buffer (buf
);
1642 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1646 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1647 doc
: /* Return the current buffer as a Lisp object. */)
1650 register Lisp_Object buf
;
1651 XSETBUFFER (buf
, current_buffer
);
1655 /* Set the current buffer to B.
1657 We previously set windows_or_buffers_changed here to invalidate
1658 global unchanged information in beg_unchanged and end_unchanged.
1659 This is no longer necessary because we now compute unchanged
1660 information on a buffer-basis. Every action affecting other
1661 windows than the selected one requires a select_window at some
1662 time, and that increments windows_or_buffers_changed. */
1665 set_buffer_internal (b
)
1666 register struct buffer
*b
;
1668 if (current_buffer
!= b
)
1669 set_buffer_internal_1 (b
);
1672 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1673 This is used by redisplay. */
1676 set_buffer_internal_1 (b
)
1677 register struct buffer
*b
;
1679 register struct buffer
*old_buf
;
1680 register Lisp_Object tail
, valcontents
;
1683 #ifdef USE_MMAP_FOR_BUFFERS
1684 if (b
->text
->beg
== NULL
)
1685 enlarge_buffer_text (b
, 0);
1686 #endif /* USE_MMAP_FOR_BUFFERS */
1688 if (current_buffer
== b
)
1691 old_buf
= current_buffer
;
1693 last_known_column_point
= -1; /* invalidate indentation cache */
1697 /* Put the undo list back in the base buffer, so that it appears
1698 that an indirect buffer shares the undo list of its base. */
1699 if (old_buf
->base_buffer
)
1700 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1702 /* If the old current buffer has markers to record PT, BEGV and ZV
1703 when it is not current, update them now. */
1704 if (! NILP (old_buf
->pt_marker
))
1707 XSETBUFFER (obuf
, old_buf
);
1708 set_marker_both (old_buf
->pt_marker
, obuf
,
1709 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1711 if (! NILP (old_buf
->begv_marker
))
1714 XSETBUFFER (obuf
, old_buf
);
1715 set_marker_both (old_buf
->begv_marker
, obuf
,
1716 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1718 if (! NILP (old_buf
->zv_marker
))
1721 XSETBUFFER (obuf
, old_buf
);
1722 set_marker_both (old_buf
->zv_marker
, obuf
,
1723 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1727 /* Get the undo list from the base buffer, so that it appears
1728 that an indirect buffer shares the undo list of its base. */
1730 b
->undo_list
= b
->base_buffer
->undo_list
;
1732 /* If the new current buffer has markers to record PT, BEGV and ZV
1733 when it is not current, fetch them now. */
1734 if (! NILP (b
->pt_marker
))
1736 BUF_PT (b
) = marker_position (b
->pt_marker
);
1737 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1739 if (! NILP (b
->begv_marker
))
1741 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1742 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1744 if (! NILP (b
->zv_marker
))
1746 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1747 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1750 /* Look down buffer's list of local Lisp variables
1751 to find and update any that forward into C variables. */
1753 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1755 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1756 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1757 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1758 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1759 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1760 /* Just reference the variable
1761 to cause it to become set for this buffer. */
1762 Fsymbol_value (XCAR (XCAR (tail
)));
1765 /* Do the same with any others that were local to the previous buffer */
1768 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1770 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1771 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1772 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1773 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1774 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1775 /* Just reference the variable
1776 to cause it to become set for this buffer. */
1777 Fsymbol_value (XCAR (XCAR (tail
)));
1781 /* Switch to buffer B temporarily for redisplay purposes.
1782 This avoids certain things that don't need to be done within redisplay. */
1788 register struct buffer
*old_buf
;
1790 if (current_buffer
== b
)
1793 old_buf
= current_buffer
;
1798 /* If the old current buffer has markers to record PT, BEGV and ZV
1799 when it is not current, update them now. */
1800 if (! NILP (old_buf
->pt_marker
))
1803 XSETBUFFER (obuf
, old_buf
);
1804 set_marker_both (old_buf
->pt_marker
, obuf
,
1805 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1807 if (! NILP (old_buf
->begv_marker
))
1810 XSETBUFFER (obuf
, old_buf
);
1811 set_marker_both (old_buf
->begv_marker
, obuf
,
1812 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1814 if (! NILP (old_buf
->zv_marker
))
1817 XSETBUFFER (obuf
, old_buf
);
1818 set_marker_both (old_buf
->zv_marker
, obuf
,
1819 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1823 /* If the new current buffer has markers to record PT, BEGV and ZV
1824 when it is not current, fetch them now. */
1825 if (! NILP (b
->pt_marker
))
1827 BUF_PT (b
) = marker_position (b
->pt_marker
);
1828 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1830 if (! NILP (b
->begv_marker
))
1832 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1833 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1835 if (! NILP (b
->zv_marker
))
1837 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1838 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1842 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1843 doc
: /* Make the buffer BUFFER current for editing operations.
1844 BUFFER may be a buffer or the name of an existing buffer.
1845 See also `save-excursion' when you want to make a buffer current temporarily.
1846 This function does not display the buffer, so its effect ends
1847 when the current command terminates.
1848 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1850 register Lisp_Object buffer
;
1852 register Lisp_Object buf
;
1853 buf
= Fget_buffer (buffer
);
1856 if (NILP (XBUFFER (buf
)->name
))
1857 error ("Selecting deleted buffer");
1858 set_buffer_internal (XBUFFER (buf
));
1862 /* Set the current buffer to BUFFER provided it is alive. */
1865 set_buffer_if_live (buffer
)
1868 if (! NILP (XBUFFER (buffer
)->name
))
1869 Fset_buffer (buffer
);
1873 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1874 Sbarf_if_buffer_read_only
, 0, 0, 0,
1875 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1878 if (!NILP (current_buffer
->read_only
)
1879 && NILP (Vinhibit_read_only
))
1880 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1884 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1885 doc
: /* Put BUFFER at the end of the list of all buffers.
1886 There it is the least likely candidate for `other-buffer' to return;
1887 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1888 If BUFFER is nil or omitted, bury the current buffer.
1889 Also, if BUFFER is nil or omitted, remove the current buffer from the
1890 selected window if it is displayed there. */)
1892 register Lisp_Object buffer
;
1894 /* Figure out what buffer we're going to bury. */
1898 XSETBUFFER (buffer
, current_buffer
);
1900 tem
= Fwindow_buffer (selected_window
);
1901 /* If we're burying the current buffer, unshow it. */
1902 if (EQ (buffer
, tem
))
1904 if (NILP (Fwindow_dedicated_p (selected_window
)))
1905 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1906 else if (NILP (XWINDOW (selected_window
)->parent
))
1907 Ficonify_frame (Fwindow_frame (selected_window
));
1909 Fdelete_window (selected_window
);
1916 buf1
= Fget_buffer (buffer
);
1922 /* Move buffer to the end of the buffer list. Do nothing if the
1923 buffer is killed. */
1924 if (!NILP (XBUFFER (buffer
)->name
))
1926 Lisp_Object aelt
, link
;
1928 aelt
= Frassq (buffer
, Vbuffer_alist
);
1929 link
= Fmemq (aelt
, Vbuffer_alist
);
1930 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1931 XSETCDR (link
, Qnil
);
1932 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1934 frames_bury_buffer (buffer
);
1940 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1941 doc
: /* Delete the entire contents of the current buffer.
1942 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1943 so the buffer is truly empty after this. */)
1950 current_buffer
->last_window_start
= 1;
1951 /* Prevent warnings, or suspension of auto saving, that would happen
1952 if future size is less than past size. Use of erase-buffer
1953 implies that the future text is not really related to the past text. */
1954 XSETFASTINT (current_buffer
->save_length
, 0);
1959 validate_region (b
, e
)
1960 register Lisp_Object
*b
, *e
;
1962 CHECK_NUMBER_COERCE_MARKER (*b
);
1963 CHECK_NUMBER_COERCE_MARKER (*e
);
1965 if (XINT (*b
) > XINT (*e
))
1968 tem
= *b
; *b
= *e
; *e
= tem
;
1971 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1972 && XINT (*e
) <= ZV
))
1973 args_out_of_range (*b
, *e
);
1976 /* Advance BYTE_POS up to a character boundary
1977 and return the adjusted position. */
1980 advance_to_char_boundary (byte_pos
)
1985 if (byte_pos
== BEG
)
1986 /* Beginning of buffer is always a character boundary. */
1989 c
= FETCH_BYTE (byte_pos
);
1990 if (! CHAR_HEAD_P (c
))
1992 /* We should advance BYTE_POS only when C is a constituent of a
1993 multibyte sequence. */
1994 int orig_byte_pos
= byte_pos
;
1999 c
= FETCH_BYTE (byte_pos
);
2001 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2003 if (byte_pos
< orig_byte_pos
)
2004 byte_pos
= orig_byte_pos
;
2005 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2006 surely advance to the correct character boundary. If C is
2007 not, BYTE_POS was unchanged. */
2013 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2015 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2016 If FLAG is t, this makes the buffer a multibyte buffer.
2017 If FLAG is nil, this makes the buffer a single-byte buffer.
2018 The buffer contents remain unchanged as a sequence of bytes
2019 but the contents viewed as characters do change. */)
2023 Lisp_Object tail
, markers
;
2024 struct buffer
*other
;
2025 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2026 int begv
= BEGV
, zv
= ZV
;
2027 int narrowed
= (BEG
!= begv
|| Z
!= zv
);
2028 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2030 if (current_buffer
->base_buffer
)
2031 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2033 /* Do nothing if nothing actually changes. */
2034 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2037 /* It would be better to update the list,
2038 but this is good enough for now. */
2040 current_buffer
->undo_list
= Qt
;
2042 /* If the cached position is for this buffer, clear it out. */
2043 clear_charpos_cache (current_buffer
);
2053 /* Do this first, so it can use CHAR_TO_BYTE
2054 to calculate the old correspondences. */
2055 set_intervals_multibyte (0);
2057 current_buffer
->enable_multibyte_characters
= Qnil
;
2063 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2065 tail
= BUF_MARKERS (current_buffer
);
2066 while (! NILP (tail
))
2068 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
2069 tail
= XMARKER (tail
)->chain
;
2072 /* Convert multibyte form of 8-bit characters to unibyte. */
2087 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2088 p
+= bytes
, pos
+= bytes
;
2091 c
= STRING_CHAR (p
, stop
- pos
);
2092 /* Delete all bytes for this 8-bit character but the
2093 last one, and change the last one to the charcter
2096 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2108 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2116 /* Be sure not to have a multibyte sequence striding over the GAP.
2117 Ex: We change this: "...abc\201 _GAP_ \241def..."
2118 to: "...abc _GAP_ \201\241def..." */
2120 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2121 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2123 unsigned char *p
= GPT_ADDR
- 1;
2125 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2126 if (BASE_LEADING_CODE_P (*p
))
2128 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2130 move_gap_both (new_gpt
, new_gpt
);
2134 /* Make the buffer contents valid as multibyte by converting
2135 8-bit characters to multibyte form. */
2151 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2152 p
+= bytes
, pos
+= bytes
;
2155 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2157 bytes
= CHAR_STRING (*p
, tmp
);
2159 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2161 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2162 /* Now the gap is after the just inserted data. */
2179 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2181 /* Do this first, so that chars_in_text asks the right question.
2182 set_intervals_multibyte needs it too. */
2183 current_buffer
->enable_multibyte_characters
= Qt
;
2185 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2186 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2188 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2190 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2191 if (BEGV_BYTE
> GPT_BYTE
)
2192 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2194 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2196 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2197 if (ZV_BYTE
> GPT_BYTE
)
2198 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2200 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2203 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2206 if (pt_byte
> GPT_BYTE
)
2207 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2209 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2210 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2213 tail
= markers
= BUF_MARKERS (current_buffer
);
2215 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2216 getting confused by the markers that have not yet been updated.
2217 It is also a signal that it should never create a marker. */
2218 BUF_MARKERS (current_buffer
) = Qnil
;
2220 while (! NILP (tail
))
2222 XMARKER (tail
)->bytepos
2223 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
2224 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
2226 tail
= XMARKER (tail
)->chain
;
2229 /* Make sure no markers were put on the chain
2230 while the chain value was incorrect. */
2231 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
2234 BUF_MARKERS (current_buffer
) = markers
;
2236 /* Do this last, so it can calculate the new correspondences
2237 between chars and bytes. */
2238 set_intervals_multibyte (1);
2242 current_buffer
->undo_list
= Qnil
;
2244 /* Changing the multibyteness of a buffer means that all windows
2245 showing that buffer must be updated thoroughly. */
2246 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2247 ++windows_or_buffers_changed
;
2249 /* Copy this buffer's new multibyte status
2250 into all of its indirect buffers. */
2251 for (other
= all_buffers
; other
; other
= other
->next
)
2252 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2254 other
->enable_multibyte_characters
2255 = current_buffer
->enable_multibyte_characters
;
2256 other
->prevent_redisplay_optimizations_p
= 1;
2259 /* Restore the modifiedness of the buffer. */
2260 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2261 Fset_buffer_modified_p (Qnil
);
2266 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2268 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2269 Most local variable bindings are eliminated so that the default values
2270 become effective once more. Also, the syntax table is set from
2271 `standard-syntax-table', the local keymap is set to nil,
2272 and the abbrev table from `fundamental-mode-abbrev-table'.
2273 This function also forces redisplay of the mode line.
2275 Every function to select a new major mode starts by
2276 calling this function.
2278 As a special exception, local variables whose names have
2279 a non-nil `permanent-local' property are not eliminated by this function.
2281 The first thing this function does is run
2282 the normal hook `change-major-mode-hook'. */)
2285 register Lisp_Object alist
, sym
, tem
;
2288 if (!NILP (Vrun_hooks
))
2289 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2290 oalist
= current_buffer
->local_var_alist
;
2292 /* Make sure none of the bindings in oalist
2293 remain swapped in, in their symbols. */
2295 swap_out_buffer_local_variables (current_buffer
);
2297 /* Actually eliminate all local bindings of this buffer. */
2299 reset_buffer_local_variables (current_buffer
, 0);
2301 /* Redisplay mode lines; we are changing major mode. */
2303 update_mode_lines
++;
2305 /* Any which are supposed to be permanent,
2306 make local again, with the same values they had. */
2308 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2310 sym
= XCAR (XCAR (alist
));
2311 tem
= Fget (sym
, Qpermanent_local
);
2314 Fmake_local_variable (sym
);
2315 Fset (sym
, XCDR (XCAR (alist
)));
2319 /* Force mode-line redisplay. Useful here because all major mode
2320 commands call this function. */
2321 update_mode_lines
++;
2326 /* Make sure no local variables remain set up with buffer B
2327 for their current values. */
2330 swap_out_buffer_local_variables (b
)
2333 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2335 XSETBUFFER (buffer
, b
);
2336 oalist
= b
->local_var_alist
;
2338 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2340 sym
= XCAR (XCAR (alist
));
2342 /* Need not do anything if some other buffer's binding is now encached. */
2343 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2344 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2346 /* Symbol is set up for this buffer's old local value.
2347 Set it up for the current buffer with the default value. */
2349 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2350 /* Store the symbol's current value into the alist entry
2351 it is currently set up for. This is so that, if the
2352 local is marked permanent, and we make it local again
2353 later in Fkill_all_local_variables, we don't lose the value. */
2354 XSETCDR (XCAR (tem
),
2355 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2356 /* Switch to the symbol's default-value alist entry. */
2358 /* Mark it as current for buffer B. */
2359 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2360 /* Store the current value into any forwarding in the symbol. */
2361 store_symval_forwarding (sym
,
2362 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2368 /* Find all the overlays in the current buffer that contain position POS.
2369 Return the number found, and store them in a vector in *VEC_PTR.
2370 Store in *LEN_PTR the size allocated for the vector.
2371 Store in *NEXT_PTR the next position after POS where an overlay starts,
2372 or ZV if there are no more overlays.
2373 Store in *PREV_PTR the previous position before POS where an overlay ends,
2374 or where an overlay starts which ends at or after POS;
2375 or BEGV if there are no such overlays.
2376 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2378 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2379 when this function is called.
2381 If EXTEND is non-zero, we make the vector bigger if necessary.
2382 If EXTEND is zero, we never extend the vector,
2383 and we store only as many overlays as will fit.
2384 But we still return the total number of overlays.
2386 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2387 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2388 default (BEGV or ZV). */
2391 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2394 Lisp_Object
**vec_ptr
;
2400 Lisp_Object tail
, overlay
, start
, end
;
2403 Lisp_Object
*vec
= *vec_ptr
;
2406 int inhibit_storing
= 0;
2408 for (tail
= current_buffer
->overlays_before
;
2412 int startpos
, endpos
;
2414 overlay
= XCAR (tail
);
2416 start
= OVERLAY_START (overlay
);
2417 end
= OVERLAY_END (overlay
);
2418 endpos
= OVERLAY_POSITION (end
);
2425 startpos
= OVERLAY_POSITION (start
);
2426 /* This one ends at or after POS
2427 so its start counts for PREV_PTR if it's before POS. */
2428 if (prev
< startpos
&& startpos
< pos
)
2432 if (startpos
<= pos
)
2436 /* The supplied vector is full.
2437 Either make it bigger, or don't store any more in it. */
2440 /* Make it work with an initial len == 0. */
2445 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2449 inhibit_storing
= 1;
2452 if (!inhibit_storing
)
2454 /* Keep counting overlays even if we can't return them all. */
2457 else if (startpos
< next
)
2461 for (tail
= current_buffer
->overlays_after
;
2465 int startpos
, endpos
;
2467 overlay
= XCAR (tail
);
2469 start
= OVERLAY_START (overlay
);
2470 end
= OVERLAY_END (overlay
);
2471 startpos
= OVERLAY_POSITION (start
);
2474 if (startpos
< next
)
2478 endpos
= OVERLAY_POSITION (end
);
2485 *len_ptr
= len
*= 2;
2488 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2492 inhibit_storing
= 1;
2495 if (!inhibit_storing
)
2499 if (startpos
< pos
&& startpos
> prev
)
2502 else if (endpos
< pos
&& endpos
> prev
)
2504 else if (endpos
== pos
&& startpos
> prev
2505 && (!change_req
|| startpos
< pos
))
2516 /* Find all the overlays in the current buffer that overlap the range BEG-END
2517 or are empty at BEG.
2519 Return the number found, and store them in a vector in *VEC_PTR.
2520 Store in *LEN_PTR the size allocated for the vector.
2521 Store in *NEXT_PTR the next position after POS where an overlay starts,
2522 or ZV if there are no more overlays.
2523 Store in *PREV_PTR the previous position before POS where an overlay ends,
2524 or BEGV if there are no previous overlays.
2525 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2527 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2528 when this function is called.
2530 If EXTEND is non-zero, we make the vector bigger if necessary.
2531 If EXTEND is zero, we never extend the vector,
2532 and we store only as many overlays as will fit.
2533 But we still return the total number of overlays. */
2536 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2539 Lisp_Object
**vec_ptr
;
2544 Lisp_Object tail
, overlay
, ostart
, oend
;
2547 Lisp_Object
*vec
= *vec_ptr
;
2550 int inhibit_storing
= 0;
2552 for (tail
= current_buffer
->overlays_before
;
2556 int startpos
, endpos
;
2558 overlay
= XCAR (tail
);
2560 ostart
= OVERLAY_START (overlay
);
2561 oend
= OVERLAY_END (overlay
);
2562 endpos
= OVERLAY_POSITION (oend
);
2569 startpos
= OVERLAY_POSITION (ostart
);
2570 /* Count an interval if it either overlaps the range
2571 or is empty at the start of the range. */
2572 if ((beg
< endpos
&& startpos
< end
)
2573 || (startpos
== endpos
&& beg
== endpos
))
2577 /* The supplied vector is full.
2578 Either make it bigger, or don't store any more in it. */
2581 *len_ptr
= len
*= 2;
2582 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2586 inhibit_storing
= 1;
2589 if (!inhibit_storing
)
2591 /* Keep counting overlays even if we can't return them all. */
2594 else if (startpos
< next
)
2598 for (tail
= current_buffer
->overlays_after
;
2602 int startpos
, endpos
;
2604 overlay
= XCAR (tail
);
2606 ostart
= OVERLAY_START (overlay
);
2607 oend
= OVERLAY_END (overlay
);
2608 startpos
= OVERLAY_POSITION (ostart
);
2611 if (startpos
< next
)
2615 endpos
= OVERLAY_POSITION (oend
);
2616 /* Count an interval if it either overlaps the range
2617 or is empty at the start of the range. */
2618 if ((beg
< endpos
&& startpos
< end
)
2619 || (startpos
== endpos
&& beg
== endpos
))
2625 *len_ptr
= len
*= 2;
2626 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2630 inhibit_storing
= 1;
2633 if (!inhibit_storing
)
2637 else if (endpos
< beg
&& endpos
> prev
)
2649 /* Return non-zero if there exists an overlay with a non-nil
2650 `mouse-face' property overlapping OVERLAY. */
2653 mouse_face_overlay_overlaps (overlay
)
2654 Lisp_Object overlay
;
2656 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2657 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2659 Lisp_Object
*v
, tem
;
2662 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2663 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2666 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2667 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2670 for (i
= 0; i
< n
; ++i
)
2671 if (!EQ (v
[i
], overlay
)
2672 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2681 /* Fast function to just test if we're at an overlay boundary. */
2683 overlay_touches_p (pos
)
2686 Lisp_Object tail
, overlay
;
2688 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2693 overlay
= XCAR (tail
);
2694 if (!GC_OVERLAYP (overlay
))
2697 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2700 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2704 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2709 overlay
= XCAR (tail
);
2710 if (!GC_OVERLAYP (overlay
))
2713 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2716 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2724 Lisp_Object overlay
;
2730 compare_overlays (v1
, v2
)
2731 const void *v1
, *v2
;
2733 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2734 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2735 if (s1
->priority
!= s2
->priority
)
2736 return s1
->priority
- s2
->priority
;
2737 if (s1
->beg
!= s2
->beg
)
2738 return s1
->beg
- s2
->beg
;
2739 if (s1
->end
!= s2
->end
)
2740 return s2
->end
- s1
->end
;
2744 /* Sort an array of overlays by priority. The array is modified in place.
2745 The return value is the new size; this may be smaller than the original
2746 size if some of the overlays were invalid or were window-specific. */
2748 sort_overlays (overlay_vec
, noverlays
, w
)
2749 Lisp_Object
*overlay_vec
;
2754 struct sortvec
*sortvec
;
2755 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2757 /* Put the valid and relevant overlays into sortvec. */
2759 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2762 Lisp_Object overlay
;
2764 overlay
= overlay_vec
[i
];
2765 if (OVERLAY_VALID (overlay
)
2766 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2767 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2769 /* If we're interested in a specific window, then ignore
2770 overlays that are limited to some other window. */
2775 window
= Foverlay_get (overlay
, Qwindow
);
2776 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2780 /* This overlay is good and counts: put it into sortvec. */
2781 sortvec
[j
].overlay
= overlay
;
2782 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2783 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2784 tem
= Foverlay_get (overlay
, Qpriority
);
2786 sortvec
[j
].priority
= XINT (tem
);
2788 sortvec
[j
].priority
= 0;
2794 /* Sort the overlays into the proper order: increasing priority. */
2797 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2799 for (i
= 0; i
< noverlays
; i
++)
2800 overlay_vec
[i
] = sortvec
[i
].overlay
;
2806 Lisp_Object string
, string2
;
2813 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2814 int size
; /* Allocated length of that array. */
2815 int used
; /* How much of the array is currently in use. */
2816 int bytes
; /* Total length of the strings in buf. */
2819 /* Buffers for storing information about the overlays touching a given
2820 position. These could be automatic variables in overlay_strings, but
2821 it's more efficient to hold onto the memory instead of repeatedly
2822 allocating and freeing it. */
2823 static struct sortstrlist overlay_heads
, overlay_tails
;
2824 static unsigned char *overlay_str_buf
;
2826 /* Allocated length of overlay_str_buf. */
2827 static int overlay_str_len
;
2829 /* A comparison function suitable for passing to qsort. */
2831 cmp_for_strings (as1
, as2
)
2834 struct sortstr
*s1
= (struct sortstr
*)as1
;
2835 struct sortstr
*s2
= (struct sortstr
*)as2
;
2836 if (s1
->size
!= s2
->size
)
2837 return s2
->size
- s1
->size
;
2838 if (s1
->priority
!= s2
->priority
)
2839 return s1
->priority
- s2
->priority
;
2844 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2845 struct sortstrlist
*ssl
;
2846 Lisp_Object str
, str2
, pri
;
2851 if (ssl
->used
== ssl
->size
)
2857 ssl
->buf
= ((struct sortstr
*)
2858 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2860 ssl
->buf
[ssl
->used
].string
= str
;
2861 ssl
->buf
[ssl
->used
].string2
= str2
;
2862 ssl
->buf
[ssl
->used
].size
= size
;
2863 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2866 if (NILP (current_buffer
->enable_multibyte_characters
))
2867 nbytes
= XSTRING (str
)->size
;
2868 else if (! STRING_MULTIBYTE (str
))
2869 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2870 STRING_BYTES (XSTRING (str
)));
2872 nbytes
= STRING_BYTES (XSTRING (str
));
2874 ssl
->bytes
+= nbytes
;
2878 if (NILP (current_buffer
->enable_multibyte_characters
))
2879 nbytes
= XSTRING (str2
)->size
;
2880 else if (! STRING_MULTIBYTE (str2
))
2881 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2882 STRING_BYTES (XSTRING (str2
)));
2884 nbytes
= STRING_BYTES (XSTRING (str2
));
2886 ssl
->bytes
+= nbytes
;
2890 /* Return the concatenation of the strings associated with overlays that
2891 begin or end at POS, ignoring overlays that are specific to a window
2892 other than W. The strings are concatenated in the appropriate order:
2893 shorter overlays nest inside longer ones, and higher priority inside
2894 lower. Normally all of the after-strings come first, but zero-sized
2895 overlays have their after-strings ride along with the before-strings
2896 because it would look strange to print them inside-out.
2898 Returns the string length, and stores the contents indirectly through
2899 PSTR, if that variable is non-null. The string may be overwritten by
2900 subsequent calls. */
2903 overlay_strings (pos
, w
, pstr
)
2906 unsigned char **pstr
;
2908 Lisp_Object ov
, overlay
, window
, str
;
2909 int startpos
, endpos
;
2910 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2912 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2913 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2914 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCDR (ov
))
2916 overlay
= XCAR (ov
);
2917 if (!OVERLAYP (overlay
))
2920 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2921 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2924 if (endpos
!= pos
&& startpos
!= pos
)
2926 window
= Foverlay_get (overlay
, Qwindow
);
2927 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2930 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2931 record_overlay_string (&overlay_heads
, str
,
2933 ? Foverlay_get (overlay
, Qafter_string
)
2935 Foverlay_get (overlay
, Qpriority
),
2937 else if (endpos
== pos
2938 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2939 record_overlay_string (&overlay_tails
, str
, Qnil
,
2940 Foverlay_get (overlay
, Qpriority
),
2943 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCDR (ov
))
2945 overlay
= XCAR (ov
);
2946 if (!OVERLAYP (overlay
))
2949 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2950 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2953 if (endpos
!= pos
&& startpos
!= pos
)
2955 window
= Foverlay_get (overlay
, Qwindow
);
2956 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2959 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2960 record_overlay_string (&overlay_heads
, str
,
2962 ? Foverlay_get (overlay
, Qafter_string
)
2964 Foverlay_get (overlay
, Qpriority
),
2966 else if (endpos
== pos
2967 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2968 record_overlay_string (&overlay_tails
, str
, Qnil
,
2969 Foverlay_get (overlay
, Qpriority
),
2972 if (overlay_tails
.used
> 1)
2973 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2975 if (overlay_heads
.used
> 1)
2976 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2978 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2983 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2985 if (total
> overlay_str_len
)
2987 overlay_str_len
= total
;
2988 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2991 p
= overlay_str_buf
;
2992 for (i
= overlay_tails
.used
; --i
>= 0;)
2995 tem
= overlay_tails
.buf
[i
].string
;
2996 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2997 STRING_BYTES (XSTRING (tem
)),
2998 STRING_MULTIBYTE (tem
), multibyte
);
3001 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3004 tem
= overlay_heads
.buf
[i
].string
;
3005 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
3006 STRING_BYTES (XSTRING (tem
)),
3007 STRING_MULTIBYTE (tem
), multibyte
);
3009 tem
= overlay_heads
.buf
[i
].string2
;
3012 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
3013 STRING_BYTES (XSTRING (tem
)),
3014 STRING_MULTIBYTE (tem
), multibyte
);
3018 if (p
!= overlay_str_buf
+ total
)
3021 *pstr
= overlay_str_buf
;
3027 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3030 recenter_overlay_lists (buf
, pos
)
3034 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
3036 /* See if anything in overlays_before should move to overlays_after. */
3038 /* We don't strictly need prev in this loop; it should always be nil.
3039 But we use it for symmetry and in case that should cease to be true
3040 with some future change. */
3042 for (tail
= buf
->overlays_before
;
3044 prev
= tail
, tail
= next
)
3047 overlay
= XCAR (tail
);
3049 /* If the overlay is not valid, get rid of it. */
3050 if (!OVERLAY_VALID (overlay
))
3055 /* Splice the cons cell TAIL out of overlays_before. */
3059 buf
->overlays_before
= next
;
3065 beg
= OVERLAY_START (overlay
);
3066 end
= OVERLAY_END (overlay
);
3068 if (OVERLAY_POSITION (end
) > pos
)
3070 /* OVERLAY needs to be moved. */
3071 int where
= OVERLAY_POSITION (beg
);
3072 Lisp_Object other
, other_prev
;
3074 /* Splice the cons cell TAIL out of overlays_before. */
3076 XSETCDR (prev
, next
);
3078 buf
->overlays_before
= next
;
3080 /* Search thru overlays_after for where to put it. */
3082 for (other
= buf
->overlays_after
;
3084 other_prev
= other
, other
= XCDR (other
))
3086 Lisp_Object otherbeg
, otheroverlay
;
3088 otheroverlay
= XCAR (other
);
3089 if (! OVERLAY_VALID (otheroverlay
))
3092 otherbeg
= OVERLAY_START (otheroverlay
);
3093 if (OVERLAY_POSITION (otherbeg
) >= where
)
3097 /* Add TAIL to overlays_after before OTHER. */
3098 XSETCDR (tail
, other
);
3099 if (!NILP (other_prev
))
3100 XSETCDR (other_prev
, tail
);
3102 buf
->overlays_after
= tail
;
3106 /* We've reached the things that should stay in overlays_before.
3107 All the rest of overlays_before must end even earlier,
3112 /* See if anything in overlays_after should be in overlays_before. */
3114 for (tail
= buf
->overlays_after
;
3116 prev
= tail
, tail
= next
)
3119 overlay
= XCAR (tail
);
3121 /* If the overlay is not valid, get rid of it. */
3122 if (!OVERLAY_VALID (overlay
))
3127 /* Splice the cons cell TAIL out of overlays_after. */
3131 buf
->overlays_after
= next
;
3137 beg
= OVERLAY_START (overlay
);
3138 end
= OVERLAY_END (overlay
);
3140 /* Stop looking, when we know that nothing further
3141 can possibly end before POS. */
3142 if (OVERLAY_POSITION (beg
) > pos
)
3145 if (OVERLAY_POSITION (end
) <= pos
)
3147 /* OVERLAY needs to be moved. */
3148 int where
= OVERLAY_POSITION (end
);
3149 Lisp_Object other
, other_prev
;
3151 /* Splice the cons cell TAIL out of overlays_after. */
3153 XSETCDR (prev
, next
);
3155 buf
->overlays_after
= next
;
3157 /* Search thru overlays_before for where to put it. */
3159 for (other
= buf
->overlays_before
;
3161 other_prev
= other
, other
= XCDR (other
))
3163 Lisp_Object otherend
, otheroverlay
;
3165 otheroverlay
= XCAR (other
);
3166 if (! OVERLAY_VALID (otheroverlay
))
3169 otherend
= OVERLAY_END (otheroverlay
);
3170 if (OVERLAY_POSITION (otherend
) <= where
)
3174 /* Add TAIL to overlays_before before OTHER. */
3175 XSETCDR (tail
, other
);
3176 if (!NILP (other_prev
))
3177 XSETCDR (other_prev
, tail
);
3179 buf
->overlays_before
= tail
;
3184 XSETFASTINT (buf
->overlay_center
, pos
);
3188 adjust_overlays_for_insert (pos
, length
)
3192 /* After an insertion, the lists are still sorted properly,
3193 but we may need to update the value of the overlay center. */
3194 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
3195 XSETFASTINT (current_buffer
->overlay_center
,
3196 XFASTINT (current_buffer
->overlay_center
) + length
);
3200 adjust_overlays_for_delete (pos
, length
)
3204 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
3205 /* The deletion was to our right. No change needed; the before- and
3206 after-lists are still consistent. */
3208 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
3209 /* The deletion was to our left. We need to adjust the center value
3210 to account for the change in position, but the lists are consistent
3211 given the new value. */
3212 XSETFASTINT (current_buffer
->overlay_center
,
3213 XFASTINT (current_buffer
->overlay_center
) - length
);
3215 /* We're right in the middle. There might be things on the after-list
3216 that now belong on the before-list. Recentering will move them,
3217 and also update the center point. */
3218 recenter_overlay_lists (current_buffer
, pos
);
3221 /* Fix up overlays that were garbled as a result of permuting markers
3222 in the range START through END. Any overlay with at least one
3223 endpoint in this range will need to be unlinked from the overlay
3224 list and reinserted in its proper place.
3225 Such an overlay might even have negative size at this point.
3226 If so, we'll reverse the endpoints. Can you think of anything
3227 better to do in this situation? */
3229 fix_overlays_in_range (start
, end
)
3230 register int start
, end
;
3232 Lisp_Object overlay
;
3233 Lisp_Object before_list
, after_list
;
3234 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
3235 int startpos
, endpos
;
3237 /* This algorithm shifts links around instead of consing and GCing.
3238 The loop invariant is that before_list (resp. after_list) is a
3239 well-formed list except that its last element, the one that
3240 *pbefore (resp. *pafter) points to, is still uninitialized.
3241 So it's not a bug that before_list isn't initialized, although
3242 it may look strange. */
3243 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
3245 overlay
= XCAR (*ptail
);
3246 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3249 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3251 || (startpos
>= start
&& startpos
< end
))
3253 /* If the overlay is backwards, fix that now. */
3254 if (startpos
> endpos
)
3257 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3259 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3261 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3263 /* Add it to the end of the wrong list. Later on,
3264 recenter_overlay_lists will move it to the right place. */
3265 if (endpos
< XINT (current_buffer
->overlay_center
))
3268 pafter
= &XCDR (*ptail
);
3273 pbefore
= &XCDR (*ptail
);
3275 *ptail
= XCDR (*ptail
);
3278 ptail
= &XCDR (*ptail
);
3280 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
3282 overlay
= XCAR (*ptail
);
3283 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3284 if (startpos
>= end
)
3286 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3287 if (startpos
>= start
3288 || (endpos
>= start
&& endpos
< end
))
3290 if (startpos
> endpos
)
3293 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3295 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3297 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3299 if (endpos
< XINT (current_buffer
->overlay_center
))
3302 pafter
= &XCDR (*ptail
);
3307 pbefore
= &XCDR (*ptail
);
3309 *ptail
= XCDR (*ptail
);
3312 ptail
= &XCDR (*ptail
);
3315 /* Splice the constructed (wrong) lists into the buffer's lists,
3316 and let the recenter function make it sane again. */
3317 *pbefore
= current_buffer
->overlays_before
;
3318 current_buffer
->overlays_before
= before_list
;
3319 recenter_overlay_lists (current_buffer
,
3320 XINT (current_buffer
->overlay_center
));
3322 *pafter
= current_buffer
->overlays_after
;
3323 current_buffer
->overlays_after
= after_list
;
3324 recenter_overlay_lists (current_buffer
,
3325 XINT (current_buffer
->overlay_center
));
3328 /* We have two types of overlay: the one whose ending marker is
3329 after-insertion-marker (this is the usual case) and the one whose
3330 ending marker is before-insertion-marker. When `overlays_before'
3331 contains overlays of the latter type and the former type in this
3332 order and both overlays end at inserting position, inserting a text
3333 increases only the ending marker of the latter type, which results
3334 in incorrect ordering of `overlays_before'.
3336 This function fixes ordering of overlays in the slot
3337 `overlays_before' of the buffer *BP. Before the insertion, `point'
3338 was at PREV, and now is at POS. */
3341 fix_overlays_before (bp
, prev
, pos
)
3345 Lisp_Object
*tailp
= &bp
->overlays_before
;
3346 Lisp_Object
*right_place
;
3349 /* After the insertion, the several overlays may be in incorrect
3350 order. The possibility is that, in the list `overlays_before',
3351 an overlay which ends at POS appears after an overlay which ends
3352 at PREV. Since POS is greater than PREV, we must fix the
3353 ordering of these overlays, by moving overlays ends at POS before
3354 the overlays ends at PREV. */
3356 /* At first, find a place where disordered overlays should be linked
3357 in. It is where an overlay which end before POS exists. (i.e. an
3358 overlay whose ending marker is after-insertion-marker if disorder
3360 while (!NILP (*tailp
)
3361 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp
))))
3363 tailp
= &XCDR (*tailp
);
3365 /* If we don't find such an overlay,
3366 or the found one ends before PREV,
3367 or the found one is the last one in the list,
3368 we don't have to fix anything. */
3371 || NILP (XCDR (*tailp
)))
3374 right_place
= tailp
;
3375 tailp
= &XCDR (*tailp
);
3377 /* Now, end position of overlays in the list *TAILP should be before
3378 or equal to PREV. In the loop, an overlay which ends at POS is
3379 moved ahead to the place pointed by RIGHT_PLACE. If we found an
3380 overlay which ends before PREV, the remaining overlays are in
3382 while (!NILP (*tailp
))
3384 end
= OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp
)));
3387 { /* This overlay is disordered. */
3388 Lisp_Object found
= *tailp
;
3390 /* Unlink the found overlay. */
3391 *tailp
= XCDR (found
);
3392 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
3393 XCDR (found
) = *right_place
;
3394 /* Link it into the right place. */
3395 *right_place
= found
;
3397 else if (end
== prev
)
3398 tailp
= &XCDR (*tailp
);
3399 else /* No more disordered overlay. */
3404 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3405 doc
: /* Return t if OBJECT is an overlay. */)
3409 return (OVERLAYP (object
) ? Qt
: Qnil
);
3412 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3413 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3414 If omitted, BUFFER defaults to the current buffer.
3415 BEG and END may be integers or markers.
3416 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3417 front delimiter advance when text is inserted there.
3418 The fifth arg REAR-ADVANCE, if non-nil, makes the
3419 rear delimiter advance when text is inserted there. */)
3420 (beg
, end
, buffer
, front_advance
, rear_advance
)
3421 Lisp_Object beg
, end
, buffer
;
3422 Lisp_Object front_advance
, rear_advance
;
3424 Lisp_Object overlay
;
3428 XSETBUFFER (buffer
, current_buffer
);
3430 CHECK_BUFFER (buffer
);
3432 && ! EQ (Fmarker_buffer (beg
), buffer
))
3433 error ("Marker points into wrong buffer");
3435 && ! EQ (Fmarker_buffer (end
), buffer
))
3436 error ("Marker points into wrong buffer");
3438 CHECK_NUMBER_COERCE_MARKER (beg
);
3439 CHECK_NUMBER_COERCE_MARKER (end
);
3441 if (XINT (beg
) > XINT (end
))
3444 temp
= beg
; beg
= end
; end
= temp
;
3447 b
= XBUFFER (buffer
);
3449 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3450 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3452 if (!NILP (front_advance
))
3453 XMARKER (beg
)->insertion_type
= 1;
3454 if (!NILP (rear_advance
))
3455 XMARKER (end
)->insertion_type
= 1;
3457 overlay
= allocate_misc ();
3458 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3459 XOVERLAY (overlay
)->start
= beg
;
3460 XOVERLAY (overlay
)->end
= end
;
3461 XOVERLAY (overlay
)->plist
= Qnil
;
3463 /* Put the new overlay on the wrong list. */
3464 end
= OVERLAY_END (overlay
);
3465 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3466 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3468 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3470 /* This puts it in the right list, and in the right order. */
3471 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3473 /* We don't need to redisplay the region covered by the overlay, because
3474 the overlay has no properties at the moment. */
3479 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3482 modify_overlay (buf
, start
, end
)
3493 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3495 /* If this is a buffer not in the selected window,
3496 we must do other windows. */
3497 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3498 windows_or_buffers_changed
= 1;
3499 /* If multiple windows show this buffer, we must do other windows. */
3500 else if (buffer_shared
> 1)
3501 windows_or_buffers_changed
= 1;
3503 ++BUF_OVERLAY_MODIFF (buf
);
3507 Lisp_Object
Fdelete_overlay ();
3509 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3510 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3511 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3512 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3514 (overlay
, beg
, end
, buffer
)
3515 Lisp_Object overlay
, beg
, end
, buffer
;
3517 struct buffer
*b
, *ob
;
3518 Lisp_Object obuffer
;
3519 int count
= specpdl_ptr
- specpdl
;
3521 CHECK_OVERLAY (overlay
);
3523 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3525 XSETBUFFER (buffer
, current_buffer
);
3526 CHECK_BUFFER (buffer
);
3529 && ! EQ (Fmarker_buffer (beg
), buffer
))
3530 error ("Marker points into wrong buffer");
3532 && ! EQ (Fmarker_buffer (end
), buffer
))
3533 error ("Marker points into wrong buffer");
3535 CHECK_NUMBER_COERCE_MARKER (beg
);
3536 CHECK_NUMBER_COERCE_MARKER (end
);
3538 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3539 return Fdelete_overlay (overlay
);
3541 if (XINT (beg
) > XINT (end
))
3544 temp
= beg
; beg
= end
; end
= temp
;
3547 specbind (Qinhibit_quit
, Qt
);
3549 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3550 b
= XBUFFER (buffer
);
3551 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3553 /* If the overlay has changed buffers, do a thorough redisplay. */
3554 if (!EQ (buffer
, obuffer
))
3556 /* Redisplay where the overlay was. */
3557 if (!NILP (obuffer
))
3562 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3563 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3565 modify_overlay (ob
, o_beg
, o_end
);
3568 /* Redisplay where the overlay is going to be. */
3569 modify_overlay (b
, XINT (beg
), XINT (end
));
3572 /* Redisplay the area the overlay has just left, or just enclosed. */
3576 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3577 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3579 if (o_beg
== XINT (beg
))
3580 modify_overlay (b
, o_end
, XINT (end
));
3581 else if (o_end
== XINT (end
))
3582 modify_overlay (b
, o_beg
, XINT (beg
));
3585 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3586 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3587 modify_overlay (b
, o_beg
, o_end
);
3591 if (!NILP (obuffer
))
3593 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3594 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3597 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3598 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3600 /* Put the overlay on the wrong list. */
3601 end
= OVERLAY_END (overlay
);
3602 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3603 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3605 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3607 /* This puts it in the right list, and in the right order. */
3608 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3610 return unbind_to (count
, overlay
);
3613 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3614 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3616 Lisp_Object overlay
;
3620 int count
= specpdl_ptr
- specpdl
;
3622 CHECK_OVERLAY (overlay
);
3624 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3628 b
= XBUFFER (buffer
);
3629 specbind (Qinhibit_quit
, Qt
);
3631 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3632 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3634 marker_position (OVERLAY_START (overlay
)),
3635 marker_position (OVERLAY_END (overlay
)));
3636 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3637 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3639 /* When deleting an overlay with before or after strings, turn off
3640 display optimizations for the affected buffer, on the basis that
3641 these strings may contain newlines. This is easier to do than to
3642 check for that situation during redisplay. */
3643 if (!windows_or_buffers_changed
3644 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3645 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3646 b
->prevent_redisplay_optimizations_p
= 1;
3648 return unbind_to (count
, Qnil
);
3651 /* Overlay dissection functions. */
3653 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3654 doc
: /* Return the position at which OVERLAY starts. */)
3656 Lisp_Object overlay
;
3658 CHECK_OVERLAY (overlay
);
3660 return (Fmarker_position (OVERLAY_START (overlay
)));
3663 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3664 doc
: /* Return the position at which OVERLAY ends. */)
3666 Lisp_Object overlay
;
3668 CHECK_OVERLAY (overlay
);
3670 return (Fmarker_position (OVERLAY_END (overlay
)));
3673 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3674 doc
: /* Return the buffer OVERLAY belongs to. */)
3676 Lisp_Object overlay
;
3678 CHECK_OVERLAY (overlay
);
3680 return Fmarker_buffer (OVERLAY_START (overlay
));
3683 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3684 doc
: /* Return a list of the properties on OVERLAY.
3685 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3688 Lisp_Object overlay
;
3690 CHECK_OVERLAY (overlay
);
3692 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3696 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3697 doc
: /* Return a list of the overlays that contain position POS. */)
3702 Lisp_Object
*overlay_vec
;
3706 CHECK_NUMBER_COERCE_MARKER (pos
);
3709 /* We can't use alloca here because overlays_at can call xrealloc. */
3710 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3712 /* Put all the overlays we want in a vector in overlay_vec.
3713 Store the length in len. */
3714 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3715 (int *) 0, (int *) 0, 0);
3717 /* Make a list of them all. */
3718 result
= Flist (noverlays
, overlay_vec
);
3720 xfree (overlay_vec
);
3724 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3725 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3726 Overlap means that at least one character is contained within the overlay
3727 and also contained within the specified region.
3728 Empty overlays are included in the result if they are located at BEG
3729 or between BEG and END. */)
3731 Lisp_Object beg
, end
;
3734 Lisp_Object
*overlay_vec
;
3738 CHECK_NUMBER_COERCE_MARKER (beg
);
3739 CHECK_NUMBER_COERCE_MARKER (end
);
3742 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3744 /* Put all the overlays we want in a vector in overlay_vec.
3745 Store the length in len. */
3746 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3747 (int *) 0, (int *) 0);
3749 /* Make a list of them all. */
3750 result
= Flist (noverlays
, overlay_vec
);
3752 xfree (overlay_vec
);
3756 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3758 doc
: /* Return the next position after POS where an overlay starts or ends.
3759 If there are no more overlay boundaries after POS, return (point-max). */)
3765 Lisp_Object
*overlay_vec
;
3769 CHECK_NUMBER_COERCE_MARKER (pos
);
3772 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3774 /* Put all the overlays we want in a vector in overlay_vec.
3775 Store the length in len.
3776 endpos gets the position where the next overlay starts. */
3777 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3778 &endpos
, (int *) 0, 1);
3780 /* If any of these overlays ends before endpos,
3781 use its ending point instead. */
3782 for (i
= 0; i
< noverlays
; i
++)
3787 oend
= OVERLAY_END (overlay_vec
[i
]);
3788 oendpos
= OVERLAY_POSITION (oend
);
3789 if (oendpos
< endpos
)
3793 xfree (overlay_vec
);
3794 return make_number (endpos
);
3797 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3798 Sprevious_overlay_change
, 1, 1, 0,
3799 doc
: /* Return the previous position before POS where an overlay starts or ends.
3800 If there are no more overlay boundaries before POS, return (point-min). */)
3806 Lisp_Object
*overlay_vec
;
3809 CHECK_NUMBER_COERCE_MARKER (pos
);
3811 /* At beginning of buffer, we know the answer;
3812 avoid bug subtracting 1 below. */
3813 if (XINT (pos
) == BEGV
)
3817 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3819 /* Put all the overlays we want in a vector in overlay_vec.
3820 Store the length in len.
3821 prevpos gets the position of the previous change. */
3822 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3823 (int *) 0, &prevpos
, 1);
3825 xfree (overlay_vec
);
3826 return make_number (prevpos
);
3829 /* These functions are for debugging overlays. */
3831 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3832 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3833 The car has all the overlays before the overlay center;
3834 the cdr has all the overlays after the overlay center.
3835 Recentering overlays moves overlays between these lists.
3836 The lists you get are copies, so that changing them has no effect.
3837 However, the overlays you get are the real objects that the buffer uses. */)
3840 Lisp_Object before
, after
;
3841 before
= current_buffer
->overlays_before
;
3843 before
= Fcopy_sequence (before
);
3844 after
= current_buffer
->overlays_after
;
3846 after
= Fcopy_sequence (after
);
3848 return Fcons (before
, after
);
3851 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3852 doc
: /* Recenter the overlays of the current buffer around position POS. */)
3856 CHECK_NUMBER_COERCE_MARKER (pos
);
3858 recenter_overlay_lists (current_buffer
, XINT (pos
));
3862 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3863 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
3865 Lisp_Object overlay
, prop
;
3867 Lisp_Object plist
, fallback
;
3869 CHECK_OVERLAY (overlay
);
3873 for (plist
= XOVERLAY (overlay
)->plist
;
3874 CONSP (plist
) && CONSP (XCDR (plist
));
3875 plist
= XCDR (XCDR (plist
)))
3877 if (EQ (XCAR (plist
), prop
))
3878 return XCAR (XCDR (plist
));
3879 else if (EQ (XCAR (plist
), Qcategory
))
3882 tem
= Fcar (Fcdr (plist
));
3884 fallback
= Fget (tem
, prop
);
3891 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3892 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
3893 (overlay
, prop
, value
)
3894 Lisp_Object overlay
, prop
, value
;
3896 Lisp_Object tail
, buffer
;
3899 CHECK_OVERLAY (overlay
);
3901 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3903 for (tail
= XOVERLAY (overlay
)->plist
;
3904 CONSP (tail
) && CONSP (XCDR (tail
));
3905 tail
= XCDR (XCDR (tail
)))
3906 if (EQ (XCAR (tail
), prop
))
3908 changed
= !EQ (XCAR (XCDR (tail
)), value
);
3909 XSETCAR (XCDR (tail
), value
);
3912 /* It wasn't in the list, so add it to the front. */
3913 changed
= !NILP (value
);
3914 XOVERLAY (overlay
)->plist
3915 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3917 if (! NILP (buffer
))
3920 modify_overlay (XBUFFER (buffer
),
3921 marker_position (OVERLAY_START (overlay
)),
3922 marker_position (OVERLAY_END (overlay
)));
3923 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3924 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3925 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3926 Fdelete_overlay (overlay
);
3931 /* Subroutine of report_overlay_modification. */
3933 /* Lisp vector holding overlay hook functions to call.
3934 Vector elements come in pairs.
3935 Each even-index element is a list of hook functions.
3936 The following odd-index element is the overlay they came from.
3938 Before the buffer change, we fill in this vector
3939 as we call overlay hook functions.
3940 After the buffer change, we get the functions to call from this vector.
3941 This way we always call the same functions before and after the change. */
3942 static Lisp_Object last_overlay_modification_hooks
;
3944 /* Number of elements actually used in last_overlay_modification_hooks. */
3945 static int last_overlay_modification_hooks_used
;
3947 /* Add one functionlist/overlay pair
3948 to the end of last_overlay_modification_hooks. */
3951 add_overlay_mod_hooklist (functionlist
, overlay
)
3952 Lisp_Object functionlist
, overlay
;
3954 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3956 if (last_overlay_modification_hooks_used
== oldsize
)
3959 old
= last_overlay_modification_hooks
;
3960 last_overlay_modification_hooks
3961 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3962 bcopy (XVECTOR (old
)->contents
,
3963 XVECTOR (last_overlay_modification_hooks
)->contents
,
3964 sizeof (Lisp_Object
) * oldsize
);
3966 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3967 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3970 /* Run the modification-hooks of overlays that include
3971 any part of the text in START to END.
3972 If this change is an insertion, also
3973 run the insert-before-hooks of overlay starting at END,
3974 and the insert-after-hooks of overlay ending at START.
3976 This is called both before and after the modification.
3977 AFTER is nonzero when we call after the modification.
3979 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3980 When AFTER is nonzero, they are the start position,
3981 the position after the inserted new text,
3982 and the length of deleted or replaced old text. */
3985 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3986 Lisp_Object start
, end
;
3988 Lisp_Object arg1
, arg2
, arg3
;
3990 Lisp_Object prop
, overlay
, tail
;
3991 /* 1 if this change is an insertion. */
3992 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3994 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3998 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
4002 /* Call the functions recorded in last_overlay_modification_hooks
4003 rather than scanning the overlays again.
4004 First copy the vector contents, in case some of these hooks
4005 do subsequent modification of the buffer. */
4006 int size
= last_overlay_modification_hooks_used
;
4007 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4010 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4011 copy
, size
* sizeof (Lisp_Object
));
4013 gcpro1
.nvars
= size
;
4015 for (i
= 0; i
< size
;)
4017 Lisp_Object prop
, overlay
;
4019 overlay
= copy
[i
++];
4020 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4026 /* We are being called before a change.
4027 Scan the overlays to find the functions to call. */
4028 last_overlay_modification_hooks_used
= 0;
4030 for (tail
= current_buffer
->overlays_before
;
4034 int startpos
, endpos
;
4035 Lisp_Object ostart
, oend
;
4037 overlay
= XCAR (tail
);
4039 ostart
= OVERLAY_START (overlay
);
4040 oend
= OVERLAY_END (overlay
);
4041 endpos
= OVERLAY_POSITION (oend
);
4042 if (XFASTINT (start
) > endpos
)
4044 startpos
= OVERLAY_POSITION (ostart
);
4045 if (insertion
&& (XFASTINT (start
) == startpos
4046 || XFASTINT (end
) == startpos
))
4048 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4051 /* Copy TAIL in case the hook recenters the overlay lists. */
4053 tail
= Fcopy_sequence (tail
);
4055 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4058 if (insertion
&& (XFASTINT (start
) == endpos
4059 || XFASTINT (end
) == endpos
))
4061 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4065 tail
= Fcopy_sequence (tail
);
4067 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4070 /* Test for intersecting intervals. This does the right thing
4071 for both insertion and deletion. */
4072 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4074 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4078 tail
= Fcopy_sequence (tail
);
4080 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4086 for (tail
= current_buffer
->overlays_after
;
4090 int startpos
, endpos
;
4091 Lisp_Object ostart
, oend
;
4093 overlay
= XCAR (tail
);
4095 ostart
= OVERLAY_START (overlay
);
4096 oend
= OVERLAY_END (overlay
);
4097 startpos
= OVERLAY_POSITION (ostart
);
4098 endpos
= OVERLAY_POSITION (oend
);
4099 if (XFASTINT (end
) < startpos
)
4101 if (insertion
&& (XFASTINT (start
) == startpos
4102 || XFASTINT (end
) == startpos
))
4104 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4108 tail
= Fcopy_sequence (tail
);
4110 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4113 if (insertion
&& (XFASTINT (start
) == endpos
4114 || XFASTINT (end
) == endpos
))
4116 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4120 tail
= Fcopy_sequence (tail
);
4122 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4125 /* Test for intersecting intervals. This does the right thing
4126 for both insertion and deletion. */
4127 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4129 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4133 tail
= Fcopy_sequence (tail
);
4135 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4144 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4145 Lisp_Object list
, overlay
;
4147 Lisp_Object arg1
, arg2
, arg3
;
4149 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4151 GCPRO4 (list
, arg1
, arg2
, arg3
);
4153 add_overlay_mod_hooklist (list
, overlay
);
4155 while (!NILP (list
))
4158 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4160 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4166 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4169 evaporate_overlays (pos
)
4172 Lisp_Object tail
, overlay
, hit_list
;
4175 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
4176 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
4180 overlay
= XCAR (tail
);
4181 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4184 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4185 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4186 hit_list
= Fcons (overlay
, hit_list
);
4189 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
4193 overlay
= XCAR (tail
);
4194 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4197 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4198 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4199 hit_list
= Fcons (overlay
, hit_list
);
4201 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4202 Fdelete_overlay (XCAR (hit_list
));
4205 /* Somebody has tried to store a value with an unacceptable type
4206 in the slot with offset OFFSET. */
4209 buffer_slot_type_mismatch (offset
)
4215 switch (XINT (PER_BUFFER_TYPE (offset
)))
4218 type_name
= "integers";
4222 type_name
= "strings";
4226 type_name
= "symbols";
4233 sym
= PER_BUFFER_SYMBOL (offset
);
4234 error ("Only %s should be stored in the buffer-local variable %s",
4235 type_name
, XSYMBOL (sym
)->name
->data
);
4239 /***********************************************************************
4240 Allocation with mmap
4241 ***********************************************************************/
4243 #ifdef USE_MMAP_FOR_BUFFERS
4245 #include <sys/types.h>
4246 #include <sys/mman.h>
4249 #ifdef MAP_ANONYMOUS
4250 #define MAP_ANON MAP_ANONYMOUS
4257 #define MAP_FAILED ((void *) -1)
4270 /* Memory is allocated in regions which are mapped using mmap(2).
4271 The current implementation lets the system select mapped
4272 addresses; we're not using MAP_FIXED in general, except when
4273 trying to enlarge regions.
4275 Each mapped region starts with a mmap_region structure, the user
4276 area starts after that structure, aligned to MEM_ALIGN.
4278 +-----------------------+
4279 | struct mmap_info + |
4281 +-----------------------+
4285 +-----------------------+ */
4289 /* User-specified size. */
4290 size_t nbytes_specified
;
4292 /* Number of bytes mapped */
4293 size_t nbytes_mapped
;
4295 /* Pointer to the location holding the address of the memory
4296 allocated with the mmap'd block. The variable actually points
4297 after this structure. */
4300 /* Next and previous in list of all mmap'd regions. */
4301 struct mmap_region
*next
, *prev
;
4304 /* Doubly-linked list of mmap'd regions. */
4306 static struct mmap_region
*mmap_regions
;
4308 /* File descriptor for mmap. If we don't have anonymous mapping,
4309 /dev/zero will be opened on it. */
4313 /* Temporary storage for mmap_set_vars, see there. */
4315 static struct mmap_region
*mmap_regions_1
;
4316 static int mmap_fd_1
;
4318 /* Page size on this system. */
4320 static int mmap_page_size
;
4322 /* 1 means mmap has been intialized. */
4324 static int mmap_initialized_p
;
4326 /* Value is X rounded up to the next multiple of N. */
4328 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4330 /* Size of mmap_region structure plus padding. */
4332 #define MMAP_REGION_STRUCT_SIZE \
4333 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4335 /* Given a pointer P to the start of the user-visible part of a mapped
4336 region, return a pointer to the start of the region. */
4338 #define MMAP_REGION(P) \
4339 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4341 /* Given a pointer P to the start of a mapped region, return a pointer
4342 to the start of the user-visible part of the region. */
4344 #define MMAP_USER_AREA(P) \
4345 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4347 #define MEM_ALIGN sizeof (double)
4349 /* Function prototypes. */
4351 static int mmap_free_1
P_ ((struct mmap_region
*));
4352 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4353 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4354 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4355 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4356 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4357 static void mmap_init
P_ ((void));
4360 /* Return a region overlapping address range START...END, or null if
4361 none. END is not including, i.e. the last byte in the range
4364 static struct mmap_region
*
4365 mmap_find (start
, end
)
4366 POINTER_TYPE
*start
, *end
;
4368 struct mmap_region
*r
;
4369 char *s
= (char *) start
, *e
= (char *) end
;
4371 for (r
= mmap_regions
; r
; r
= r
->next
)
4373 char *rstart
= (char *) r
;
4374 char *rend
= rstart
+ r
->nbytes_mapped
;
4376 if (/* First byte of range, i.e. START, in this region? */
4377 (s
>= rstart
&& s
< rend
)
4378 /* Last byte of range, i.e. END - 1, in this region? */
4379 || (e
> rstart
&& e
<= rend
)
4380 /* First byte of this region in the range? */
4381 || (rstart
>= s
&& rstart
< e
)
4382 /* Last byte of this region in the range? */
4383 || (rend
> s
&& rend
<= e
))
4391 /* Unmap a region. P is a pointer to the start of the user-araa of
4392 the region. Value is non-zero if successful. */
4396 struct mmap_region
*r
;
4399 r
->next
->prev
= r
->prev
;
4401 r
->prev
->next
= r
->next
;
4403 mmap_regions
= r
->next
;
4405 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4407 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4415 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4416 Value is non-zero if successful. */
4419 mmap_enlarge (r
, npages
)
4420 struct mmap_region
*r
;
4423 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4429 /* Unmap pages at the end of the region. */
4430 nbytes
= - npages
* mmap_page_size
;
4431 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4432 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4435 r
->nbytes_mapped
-= nbytes
;
4439 else if (npages
> 0)
4441 struct mmap_region
*r2
;
4443 nbytes
= npages
* mmap_page_size
;
4445 /* Try to map additional pages at the end of the region. We
4446 cannot do this if the address range is already occupied by
4447 something else because mmap deletes any previous mapping.
4448 I'm not sure this is worth doing, let's see. */
4449 r2
= mmap_find (region_end
, region_end
+ nbytes
);
4454 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4455 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4456 if (p
== MAP_FAILED
)
4457 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4458 else if (p
!= (POINTER_TYPE
*) region_end
)
4460 /* Kernels are free to choose a different address. In
4461 that case, unmap what we've mapped above; we have
4463 if (munmap (p
, nbytes
) == -1)
4464 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4468 r
->nbytes_mapped
+= nbytes
;
4478 /* Set or reset variables holding references to mapped regions. If
4479 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4480 non-zero, set all variables to the start of the user-areas
4483 This function is called from Fdump_emacs to ensure that the dumped
4484 Emacs doesn't contain references to memory that won't be mapped
4485 when Emacs starts. */
4488 mmap_set_vars (restore_p
)
4491 struct mmap_region
*r
;
4495 mmap_regions
= mmap_regions_1
;
4496 mmap_fd
= mmap_fd_1
;
4497 for (r
= mmap_regions
; r
; r
= r
->next
)
4498 *r
->var
= MMAP_USER_AREA (r
);
4502 for (r
= mmap_regions
; r
; r
= r
->next
)
4504 mmap_regions_1
= mmap_regions
;
4505 mmap_regions
= NULL
;
4506 mmap_fd_1
= mmap_fd
;
4512 /* Allocate a block of storage large enough to hold NBYTES bytes of
4513 data. A pointer to the data is returned in *VAR. VAR is thus the
4514 address of some variable which will use the data area.
4516 The allocation of 0 bytes is valid.
4518 If we can't allocate the necessary memory, set *VAR to null, and
4521 static POINTER_TYPE
*
4522 mmap_alloc (var
, nbytes
)
4531 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4532 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4535 if (p
== MAP_FAILED
)
4537 if (errno
!= ENOMEM
)
4538 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4543 struct mmap_region
*r
= (struct mmap_region
*) p
;
4545 r
->nbytes_specified
= nbytes
;
4546 r
->nbytes_mapped
= map
;
4549 r
->next
= mmap_regions
;
4554 p
= MMAP_USER_AREA (p
);
4561 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4562 resize it to size NBYTES. Change *VAR to reflect the new block,
4563 and return this value. If more memory cannot be allocated, then
4564 leave *VAR unchanged, and return null. */
4566 static POINTER_TYPE
*
4567 mmap_realloc (var
, nbytes
)
4571 POINTER_TYPE
*result
;
4576 result
= mmap_alloc (var
, nbytes
);
4577 else if (nbytes
== 0)
4580 result
= mmap_alloc (var
, nbytes
);
4584 struct mmap_region
*r
= MMAP_REGION (*var
);
4585 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4590 POINTER_TYPE
*old_ptr
= *var
;
4592 /* Try to map additional pages at the end of the region.
4593 If that fails, allocate a new region, copy data
4594 from the old region, then free it. */
4595 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4598 r
->nbytes_specified
= nbytes
;
4599 *var
= result
= old_ptr
;
4601 else if (mmap_alloc (var
, nbytes
))
4603 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4604 mmap_free_1 (MMAP_REGION (old_ptr
));
4606 r
= MMAP_REGION (result
);
4607 r
->nbytes_specified
= nbytes
;
4615 else if (room
- nbytes
>= mmap_page_size
)
4617 /* Shrinking by at least a page. Let's give some
4618 memory back to the system. */
4619 mmap_enlarge (r
, - (room
- nbytes
) / mmap_page_size
);
4621 r
->nbytes_specified
= nbytes
;
4625 /* Leave it alone. */
4627 r
->nbytes_specified
= nbytes
;
4635 /* Free a block of relocatable storage whose data is pointed to by
4636 PTR. Store 0 in *PTR to show there's no block allocated. */
4646 mmap_free_1 (MMAP_REGION (*var
));
4652 /* Perform necessary intializations for the use of mmap. */
4658 /* The value of mmap_fd is initially 0 in temacs, and -1
4659 in a dumped Emacs. */
4662 /* No anonymous mmap -- we need the file descriptor. */
4663 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4665 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4667 #endif /* MAP_ANON == 0 */
4669 if (mmap_initialized_p
)
4671 mmap_initialized_p
= 1;
4677 mmap_page_size
= getpagesize ();
4680 #endif /* USE_MMAP_FOR_BUFFERS */
4684 /***********************************************************************
4685 Buffer-text Allocation
4686 ***********************************************************************/
4689 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4690 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4691 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4692 #endif /* REL_ALLOC */
4695 /* Allocate NBYTES bytes for buffer B's text buffer. */
4698 alloc_buffer_text (b
, nbytes
)
4705 #if defined USE_MMAP_FOR_BUFFERS
4706 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4707 #elif defined REL_ALLOC
4708 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4710 p
= xmalloc (nbytes
);
4719 b
->text
->beg
= (unsigned char *) p
;
4723 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4727 enlarge_buffer_text (b
, delta
)
4732 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4735 #if defined USE_MMAP_FOR_BUFFERS
4736 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4737 #elif defined REL_ALLOC
4738 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4740 p
= xrealloc (b
->text
->beg
, nbytes
);
4749 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4754 /* Free buffer B's text buffer. */
4757 free_buffer_text (b
)
4762 #if defined USE_MMAP_FOR_BUFFERS
4763 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4764 #elif defined REL_ALLOC
4765 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4767 xfree (b
->text
->beg
);
4770 BUF_BEG_ADDR (b
) = NULL
;
4776 /***********************************************************************
4778 ***********************************************************************/
4785 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4787 /* Make sure all markable slots in buffer_defaults
4788 are initialized reasonably, so mark_buffer won't choke. */
4789 reset_buffer (&buffer_defaults
);
4790 reset_buffer_local_variables (&buffer_defaults
, 1);
4791 reset_buffer (&buffer_local_symbols
);
4792 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4793 /* Prevent GC from getting confused. */
4794 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4795 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4796 BUF_INTERVALS (&buffer_defaults
) = 0;
4797 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4798 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4799 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4801 /* Set up the default values of various buffer slots. */
4802 /* Must do these before making the first buffer! */
4804 /* real setup is done in bindings.el */
4805 buffer_defaults
.mode_line_format
= build_string ("%-");
4806 buffer_defaults
.header_line_format
= Qnil
;
4807 buffer_defaults
.abbrev_mode
= Qnil
;
4808 buffer_defaults
.overwrite_mode
= Qnil
;
4809 buffer_defaults
.case_fold_search
= Qt
;
4810 buffer_defaults
.auto_fill_function
= Qnil
;
4811 buffer_defaults
.selective_display
= Qnil
;
4813 buffer_defaults
.selective_display_ellipses
= Qt
;
4815 buffer_defaults
.abbrev_table
= Qnil
;
4816 buffer_defaults
.display_table
= Qnil
;
4817 buffer_defaults
.undo_list
= Qnil
;
4818 buffer_defaults
.mark_active
= Qnil
;
4819 buffer_defaults
.file_format
= Qnil
;
4820 buffer_defaults
.overlays_before
= Qnil
;
4821 buffer_defaults
.overlays_after
= Qnil
;
4822 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
4824 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4825 buffer_defaults
.truncate_lines
= Qnil
;
4826 buffer_defaults
.ctl_arrow
= Qt
;
4827 buffer_defaults
.direction_reversed
= Qnil
;
4828 buffer_defaults
.cursor_type
= Qt
;
4829 buffer_defaults
.extra_line_spacing
= Qnil
;
4832 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4834 buffer_defaults
.enable_multibyte_characters
= Qt
;
4835 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4836 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4837 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4838 buffer_defaults
.cache_long_line_scans
= Qnil
;
4839 buffer_defaults
.file_truename
= Qnil
;
4840 XSETFASTINT (buffer_defaults
.display_count
, 0);
4841 buffer_defaults
.indicate_empty_lines
= Qnil
;
4842 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4843 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4844 buffer_defaults
.display_time
= Qnil
;
4846 /* Assign the local-flags to the slots that have default values.
4847 The local flag is a bit that is used in the buffer
4848 to say that it has its own local value for the slot.
4849 The local flag bits are in the local_var_flags slot of the buffer. */
4851 /* Nothing can work if this isn't true */
4852 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4854 /* 0 means not a lisp var, -1 means always local, else mask */
4855 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4856 XSETINT (buffer_local_flags
.filename
, -1);
4857 XSETINT (buffer_local_flags
.directory
, -1);
4858 XSETINT (buffer_local_flags
.backed_up
, -1);
4859 XSETINT (buffer_local_flags
.save_length
, -1);
4860 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
4861 XSETINT (buffer_local_flags
.read_only
, -1);
4862 XSETINT (buffer_local_flags
.major_mode
, -1);
4863 XSETINT (buffer_local_flags
.mode_name
, -1);
4864 XSETINT (buffer_local_flags
.undo_list
, -1);
4865 XSETINT (buffer_local_flags
.mark_active
, -1);
4866 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
4867 XSETINT (buffer_local_flags
.file_truename
, -1);
4868 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
4869 XSETINT (buffer_local_flags
.file_format
, -1);
4870 XSETINT (buffer_local_flags
.display_count
, -1);
4871 XSETINT (buffer_local_flags
.display_time
, -1);
4872 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
4875 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
4876 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
4877 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
4878 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
4879 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
4880 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
4882 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
4884 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
4885 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
4886 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
4887 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
4888 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
4889 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
4890 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
4892 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
4893 /* Make this one a permanent local. */
4894 buffer_permanent_local_flags
[idx
++] = 1;
4896 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
4897 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
4898 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
4899 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
4900 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
4901 /* Make this one a permanent local. */
4902 buffer_permanent_local_flags
[idx
++] = 1;
4903 XSETFASTINT (buffer_local_flags
.left_margin_width
, idx
); ++idx
;
4904 XSETFASTINT (buffer_local_flags
.right_margin_width
, idx
); ++idx
;
4905 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
4906 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
4907 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
4908 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
4909 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
4910 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
4912 /* Need more room? */
4913 if (idx
>= MAX_PER_BUFFER_VARS
)
4915 last_per_buffer_idx
= idx
;
4917 Vbuffer_alist
= Qnil
;
4921 QSFundamental
= build_string ("Fundamental");
4923 Qfundamental_mode
= intern ("fundamental-mode");
4924 buffer_defaults
.major_mode
= Qfundamental_mode
;
4926 Qmode_class
= intern ("mode-class");
4928 Qprotected_field
= intern ("protected-field");
4930 Qpermanent_local
= intern ("permanent-local");
4932 Qkill_buffer_hook
= intern ("kill-buffer-hook");
4934 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
4936 /* super-magic invisible buffer */
4937 Vbuffer_alist
= Qnil
;
4939 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4941 inhibit_modification_hooks
= 0;
4947 char buf
[MAXPATHLEN
+ 1];
4949 struct stat dotstat
, pwdstat
;
4953 #ifdef USE_MMAP_FOR_BUFFERS
4955 /* When using the ralloc implementation based on mmap(2), buffer
4956 text pointers will have been set to null in the dumped Emacs.
4960 for (b
= all_buffers
; b
; b
= b
->next
)
4961 if (b
->text
->beg
== NULL
)
4962 enlarge_buffer_text (b
, 0);
4964 #endif /* USE_MMAP_FOR_BUFFERS */
4966 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4967 if (NILP (buffer_defaults
.enable_multibyte_characters
))
4968 Fset_buffer_multibyte (Qnil
);
4970 /* If PWD is accurate, use it instead of calling getwd. This is faster
4971 when PWD is right, and may avoid a fatal error. */
4972 if ((pwd
= getenv ("PWD")) != 0
4973 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
4974 && stat (pwd
, &pwdstat
) == 0
4975 && stat (".", &dotstat
) == 0
4976 && dotstat
.st_ino
== pwdstat
.st_ino
4977 && dotstat
.st_dev
== pwdstat
.st_dev
4978 && strlen (pwd
) < MAXPATHLEN
)
4981 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
4982 fatal ("`getcwd' failed: %s\n", strerror (errno
));
4984 else if (getwd (buf
) == 0)
4985 fatal ("`getwd' failed: %s\n", buf
);
4989 /* Maybe this should really use some standard subroutine
4990 whose definition is filename syntax dependent. */
4992 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
4994 buf
[rc
] = DIRECTORY_SEP
;
4997 #endif /* not VMS */
4999 current_buffer
->directory
= build_string (buf
);
5001 /* Add /: to the front of the name
5002 if it would otherwise be treated as magic. */
5003 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5005 /* If the default dir is just /, TEMP is non-nil
5006 because of the ange-ftp completion handler.
5007 However, it is not necessary to turn / into /:/.
5008 So avoid doing that. */
5009 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
5010 current_buffer
->directory
5011 = concat2 (build_string ("/:"), current_buffer
->directory
);
5013 temp
= get_minibuffer (0);
5014 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5017 /* initialize the buffer routines */
5021 staticpro (&last_overlay_modification_hooks
);
5022 last_overlay_modification_hooks
5023 = Fmake_vector (make_number (10), Qnil
);
5025 staticpro (&Vbuffer_defaults
);
5026 staticpro (&Vbuffer_local_symbols
);
5027 staticpro (&Qfundamental_mode
);
5028 staticpro (&Qmode_class
);
5029 staticpro (&QSFundamental
);
5030 staticpro (&Vbuffer_alist
);
5031 staticpro (&Qprotected_field
);
5032 staticpro (&Qpermanent_local
);
5033 staticpro (&Qkill_buffer_hook
);
5034 Qoverlayp
= intern ("overlayp");
5035 staticpro (&Qoverlayp
);
5036 Qevaporate
= intern ("evaporate");
5037 staticpro (&Qevaporate
);
5038 Qmodification_hooks
= intern ("modification-hooks");
5039 staticpro (&Qmodification_hooks
);
5040 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5041 staticpro (&Qinsert_in_front_hooks
);
5042 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5043 staticpro (&Qinsert_behind_hooks
);
5044 Qget_file_buffer
= intern ("get-file-buffer");
5045 staticpro (&Qget_file_buffer
);
5046 Qpriority
= intern ("priority");
5047 staticpro (&Qpriority
);
5048 Qwindow
= intern ("window");
5049 staticpro (&Qwindow
);
5050 Qbefore_string
= intern ("before-string");
5051 staticpro (&Qbefore_string
);
5052 Qafter_string
= intern ("after-string");
5053 staticpro (&Qafter_string
);
5054 Qfirst_change_hook
= intern ("first-change-hook");
5055 staticpro (&Qfirst_change_hook
);
5056 Qbefore_change_functions
= intern ("before-change-functions");
5057 staticpro (&Qbefore_change_functions
);
5058 Qafter_change_functions
= intern ("after-change-functions");
5059 staticpro (&Qafter_change_functions
);
5061 Fput (Qprotected_field
, Qerror_conditions
,
5062 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5063 Fput (Qprotected_field
, Qerror_message
,
5064 build_string ("Attempt to modify a protected field"));
5066 /* All these use DEFVAR_LISP_NOPRO because the slots in
5067 buffer_defaults will all be marked via Vbuffer_defaults. */
5069 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5070 &buffer_defaults
.mode_line_format
,
5071 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5072 This is the same as (default-value 'mode-line-format). */);
5074 DEFVAR_LISP_NOPRO ("default-header-line-format",
5075 &buffer_defaults
.header_line_format
,
5076 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5077 This is the same as (default-value 'header-line-format). */);
5079 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5080 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5081 This is the same as (default-value 'cursor-type). */);
5083 DEFVAR_LISP_NOPRO ("default-line-spacing",
5084 &buffer_defaults
.extra_line_spacing
,
5085 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5086 This is the same as (default-value 'line-spacing). */);
5088 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5089 &buffer_defaults
.abbrev_mode
,
5090 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5091 This is the same as (default-value 'abbrev-mode). */);
5093 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5094 &buffer_defaults
.ctl_arrow
,
5095 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5096 This is the same as (default-value 'ctl-arrow). */);
5098 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5099 &buffer_defaults
.direction_reversed
,
5100 doc
: /* Default value of `direction_reversed' for buffers that do not override it.
5101 This is the same as (default-value 'direction-reversed). */);
5103 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5104 &buffer_defaults
.enable_multibyte_characters
,
5105 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5106 This is the same as (default-value 'enable-multibyte-characters). */);
5108 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5109 &buffer_defaults
.buffer_file_coding_system
,
5110 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5111 This is the same as (default-value 'buffer-file-coding-system). */);
5113 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5114 &buffer_defaults
.truncate_lines
,
5115 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5116 This is the same as (default-value 'truncate-lines). */);
5118 DEFVAR_LISP_NOPRO ("default-fill-column",
5119 &buffer_defaults
.fill_column
,
5120 doc
: /* Default value of `fill-column' for buffers that do not override it.
5121 This is the same as (default-value 'fill-column). */);
5123 DEFVAR_LISP_NOPRO ("default-left-margin",
5124 &buffer_defaults
.left_margin
,
5125 doc
: /* Default value of `left-margin' for buffers that do not override it.
5126 This is the same as (default-value 'left-margin). */);
5128 DEFVAR_LISP_NOPRO ("default-tab-width",
5129 &buffer_defaults
.tab_width
,
5130 doc
: /* Default value of `tab-width' for buffers that do not override it.
5131 This is the same as (default-value 'tab-width). */);
5133 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5134 &buffer_defaults
.case_fold_search
,
5135 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5136 This is the same as (default-value 'case-fold-search). */);
5139 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5140 &buffer_defaults
.buffer_file_type
,
5141 doc
: /* Default file type for buffers that do not override it.
5142 This is the same as (default-value 'buffer-file-type).
5143 The file type is nil for text, t for binary. */);
5146 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5147 &buffer_defaults
.left_margin_width
,
5148 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5149 This is the same as (default-value 'left-margin-width). */);
5151 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5152 &buffer_defaults
.right_margin_width
,
5153 doc
: /* Default value of `right_margin_width' for buffers that don't override it.
5154 This is the same as (default-value 'right-margin-width). */);
5156 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5157 &buffer_defaults
.indicate_empty_lines
,
5158 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5159 This is the same as (default-value 'indicate-empty-lines). */);
5161 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5162 &buffer_defaults
.scroll_up_aggressively
,
5163 doc
: /* Default value of `scroll-up-aggressively'.
5164 This value applies in buffers that don't have their own local values.
5165 This variable is an alias for (default-value 'scroll-up-aggressively). */);
5167 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5168 &buffer_defaults
.scroll_down_aggressively
,
5169 doc
: /* Default value of `scroll-down-aggressively'.
5170 This value applies in buffers that don't have their own local values.
5171 This variable is an alias for (default-value 'scroll-down-aggressively). */);
5173 DEFVAR_PER_BUFFER ("header-line-format",
5174 ¤t_buffer
->header_line_format
,
5176 doc
: /* Analogous to `mode-line-format', but controls the header line.
5177 The header line appears, optionally, at the top of a window;
5178 the mode line appears at the bottom. */);
5180 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5182 doc
: /* Template for displaying mode line for current buffer.
5183 Each buffer has its own value of this variable.
5184 Value may be nil, a string, a symbol or a list or cons cell.
5185 A value of nil means don't display a mode line.
5186 For a symbol, its value is used (but it is ignored if t or nil).
5187 A string appearing directly as the value of a symbol is processed verbatim
5188 in that the %-constructs below are not recognized.
5189 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5190 is used as a mode line element.
5191 For a list whose car is a symbol, the symbol's value is taken,
5192 and if that is non-nil, the cadr of the list is processed recursively.
5193 Otherwise, the caddr of the list (if there is one) is processed.
5194 For a list whose car is a string or list, each element is processed
5195 recursively and the results are effectively concatenated.
5196 For a list whose car is an integer, the cdr of the list is processed
5197 and padded (if the number is positive) or truncated (if negative)
5198 to the width specified by that number.
5199 A string is printed verbatim in the mode line except for %-constructs:
5200 (%-constructs are allowed when the string is the entire mode-line-format
5201 or when it is found in a cons-cell or a list)
5202 %b -- print buffer name. %f -- print visited file name.
5203 %F -- print frame name.
5204 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5205 %& is like %*, but ignore read-only-ness.
5206 % means buffer is read-only and * means it is modified.
5207 For a modified read-only buffer, %* gives % and %+ gives *.
5208 %s -- print process status. %l -- print the current line number.
5209 %c -- print the current column number (this makes editing slower).
5210 To make the column number update correctly in all cases,
5211 `column-number-mode' must be non-nil.
5212 %p -- print percent of buffer above top of window, or Top, Bot or All.
5213 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5214 or print Bottom or All.
5215 %m -- print the mode name.
5216 %n -- print Narrow if appropriate.
5217 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5218 %Z -- like %z, but including the end-of-line format.
5219 %[ -- print one [ for each recursive editing level. %] similar.
5220 %% -- print %. %- -- print infinitely many dashes.
5221 Decimal digits after the % specify field width to which to pad. */);
5223 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5224 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5225 nil here means use current buffer's major mode. */);
5227 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5228 make_number (Lisp_Symbol
),
5229 doc
: /* Symbol for current buffer's major mode. */);
5231 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5232 make_number (Lisp_String
),
5233 doc
: /* Pretty name of current buffer's major mode (a string). */);
5235 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5236 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5238 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5240 doc
: /* *Non-nil if searches and matches should ignore case. */);
5242 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5243 make_number (Lisp_Int
),
5244 doc
: /* *Column beyond which automatic line-wrapping should happen. */);
5246 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5247 make_number (Lisp_Int
),
5248 doc
: /* *Column for the default indent-line-function to indent to.
5249 Linefeed indents to this column in Fundamental mode. */);
5251 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5252 make_number (Lisp_Int
),
5253 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5255 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5256 doc
: /* *Non-nil means display control chars with uparrow.
5257 A value of nil means use backslash and octal digits.
5258 This variable does not apply to characters whose display is specified
5259 in the current display table (if there is one). */);
5261 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5262 ¤t_buffer
->enable_multibyte_characters
,
5264 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5265 Otherwise they are regarded as unibyte. This affects the display,
5266 file I/O and the behavior of various editing commands.
5268 This variable is buffer-local but you cannot set it directly;
5269 use the function `set-buffer-multibyte' to change a buffer's representation.
5270 Changing its default value with `setq-default' is supported.
5271 See also variable `default-enable-multibyte-characters' and Info node
5272 `(elisp)Text Representations'. */);
5274 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5275 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5276 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5277 This variable applies to saving the buffer, and also to `write-region'
5278 and other functions that use `write-region'.
5279 It does not apply to sending output to subprocesses, however.
5281 If this is nil, the buffer is saved without any code conversion
5282 unless some coding system is specified in `file-coding-system-alist'
5283 for the buffer file.
5285 The variable `coding-system-for-write', if non-nil, overrides this variable.
5287 This variable is never applied to a way of decoding a file while reading it. */);
5289 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5291 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5293 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5294 doc
: /* *Non-nil means do not display continuation lines.
5295 Instead, give each line of text just one screen line.
5297 Note that this is overridden by the variable
5298 `truncate-partial-width-windows' if that variable is non-nil
5299 and this buffer is not full-frame width. */);
5302 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5304 doc
: /* Non-nil if the visited file is a binary file.
5305 This variable is meaningful on MS-DOG and Windows NT.
5306 On those systems, it is automatically local in every buffer.
5307 On other systems, this variable is normally always nil. */);
5310 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5311 make_number (Lisp_String
),
5312 doc
: /* Name of default directory of current buffer. Should end with slash.
5313 To interactively change the default directory, use command `cd'. */);
5315 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5317 doc
: /* Function called (if non-nil) to perform auto-fill.
5318 It is called after self-inserting any character specified in
5319 the `auto-fill-chars' table.
5320 NOTE: This variable is not a hook;
5321 its value may not be a list of functions. */);
5323 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5324 make_number (Lisp_String
),
5325 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5327 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5328 make_number (Lisp_String
),
5329 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5330 The truename of a file is calculated by `file-truename'
5331 and then abbreviated with `abbreviate-file-name'. */);
5333 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5334 ¤t_buffer
->auto_save_file_name
,
5335 make_number (Lisp_String
),
5336 doc
: /* Name of file for auto-saving current buffer.
5337 If it is nil, that means don't auto-save this buffer. */);
5339 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5340 doc
: /* Non-nil if this buffer is read-only. */);
5342 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5343 doc
: /* Non-nil if this buffer's file has been backed up.
5344 Backing up is done before the first time the file is saved. */);
5346 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5347 make_number (Lisp_Int
),
5348 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5351 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5353 doc
: /* Non-nil enables selective display.
5354 An Integer N as value means display only lines
5355 that start with less than n columns of space.
5356 A value of t means that the character ^M makes itself and
5357 all the rest of the line invisible; also, when saving the buffer
5358 in a file, save the ^M as a newline. */);
5361 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5362 ¤t_buffer
->selective_display_ellipses
,
5364 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5367 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5368 doc
: /* Non-nil if self-insertion should replace existing text.
5369 The value should be one of `overwrite-mode-textual',
5370 `overwrite-mode-binary', or nil.
5371 If it is `overwrite-mode-textual', self-insertion still
5372 inserts at the end of a line, and inserts when point is before a tab,
5373 until the tab is filled in.
5374 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5376 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5378 doc
: /* Display table that controls display of the contents of current buffer.
5380 If this variable is nil, the value of `standard-display-table' is used.
5381 Each window can have its own, overriding display table, see
5382 `set-window-display-table' and `window-display-table'.
5384 The display table is a char-table created with `make-display-table'.
5385 A char-table is an array indexed by character codes. Normal array
5386 primitives `aref' and `aset' can be used to access elements of a char-table.
5388 Each of the char-table elements control how to display the corresponding
5389 text character: the element at index C in the table says how to display
5390 the character whose code is C. Each element should be a vector of
5391 characters or nil. nil means display the character in the default fashion;
5392 otherwise, the characters from the vector are delivered to the screen
5393 instead of the original character.
5395 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5396 a capital Y instead of each X character.
5398 In addition, a char-table has six extra slots to control the display of:
5400 the end of a truncated screen line (extra-slot 0, a single character);
5401 the end of a continued line (extra-slot 1, a single character);
5402 the escape character used to display character codes in octal
5403 (extra-slot 2, a single character);
5404 the character used as an arrow for control characters (extra-slot 3,
5405 a single character);
5406 the decoration indicating the presence of invisible lines (extra-slot 4,
5407 a vector of characters);
5408 the character used to draw the border between side-by-side windows
5409 (extra-slot 5, a single character).
5411 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5413 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_width
,
5415 doc
: /* *Width of left marginal area for display of a buffer.
5416 A value of nil means no marginal area. */);
5418 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_width
,
5420 doc
: /* *Width of right marginal area for display of a buffer.
5421 A value of nil means no marginal area. */);
5423 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5424 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5425 doc
: /* *Visually indicate empty lines after the buffer end.
5426 If non-nil, a bitmap is displayed in the left fringe of a window on
5427 window-systems. */);
5429 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5430 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5431 doc
: /* *If a number, scroll display up aggressively.
5432 If scrolling a window because point is above the window start, choose
5433 a new window start so that point ends up that fraction of the window's
5434 height from the top of the window. */);
5436 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5437 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5438 doc
: /* *If a number, scroll display down aggressively.
5439 If scrolling a window because point is below the window end, choose
5440 a new window start so that point ends up that fraction of the window's
5441 height from the bottom of the window. */);
5443 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5447 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5448 doc
: /* List of functions to call before each text change.
5449 Two arguments are passed to each function: the positions of
5450 the beginning and end of the range of old text to be changed.
5451 \(For an insertion, the beginning and end are at the same place.)
5452 No information is given about the length of the text after the change.
5454 Buffer changes made while executing the `before-change-functions'
5455 don't call any before-change or after-change functions.
5456 That's because these variables are temporarily set to nil.
5457 As a result, a hook function cannot straightforwardly alter the value of
5458 these variables. See the Emacs Lisp manual for a way of
5459 accomplishing an equivalent result by using other variables.
5461 If an unhandled error happens in running these functions,
5462 the variable's value remains nil. That prevents the error
5463 from happening repeatedly and making Emacs nonfunctional. */);
5464 Vbefore_change_functions
= Qnil
;
5466 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5467 doc
: /* List of function to call after each text change.
5468 Three arguments are passed to each function: the positions of
5469 the beginning and end of the range of changed text,
5470 and the length in bytes of the pre-change text replaced by that range.
5471 \(For an insertion, the pre-change length is zero;
5472 for a deletion, that length is the number of bytes deleted,
5473 and the post-change beginning and end are at the same place.)
5475 Buffer changes made while executing the `after-change-functions'
5476 don't call any before-change or after-change functions.
5477 That's because these variables are temporarily set to nil.
5478 As a result, a hook function cannot straightforwardly alter the value of
5479 these variables. See the Emacs Lisp manual for a way of
5480 accomplishing an equivalent result by using other variables.
5482 If an unhandled error happens in running these functions,
5483 the variable's value remains nil. That prevents the error
5484 from happening repeatedly and making Emacs nonfunctional. */);
5485 Vafter_change_functions
= Qnil
;
5487 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5488 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5489 The functions are run using the `run-hooks' function. */);
5490 Vfirst_change_hook
= Qnil
;
5492 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5493 doc
: /* List of undo entries in current buffer.
5494 Recent changes come first; older changes follow newer.
5496 An entry (BEG . END) represents an insertion which begins at
5497 position BEG and ends at position END.
5499 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5500 from (abs POSITION). If POSITION is positive, point was at the front
5501 of the text being deleted; if negative, point was at the end.
5503 An entry (t HIGH . LOW) indicates that the buffer previously had
5504 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5505 of the visited file's modification time, as of that time. If the
5506 modification time of the most recent save is different, this entry is
5509 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5510 was modified between BEG and END. PROPERTY is the property name,
5511 and VALUE is the old value.
5513 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5514 was adjusted in position by the offset DISTANCE (an integer).
5516 An entry of the form POSITION indicates that point was at the buffer
5517 location given by the integer. Undoing an entry of this form places
5520 nil marks undo boundaries. The undo command treats the changes
5521 between two undo boundaries as a single step to be undone.
5523 If the value of the variable is t, undo information is not recorded. */);
5525 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5526 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5528 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5529 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5531 Normally, the line-motion functions work by scanning the buffer for
5532 newlines. Columnar operations (like move-to-column and
5533 compute-motion) also work by scanning the buffer, summing character
5534 widths as they go. This works well for ordinary text, but if the
5535 buffer's lines are very long (say, more than 500 characters), these
5536 motion functions will take longer to execute. Emacs may also take
5537 longer to update the display.
5539 If cache-long-line-scans is non-nil, these motion functions cache the
5540 results of their scans, and consult the cache to avoid rescanning
5541 regions of the buffer until the text is modified. The caches are most
5542 beneficial when they prevent the most searching---that is, when the
5543 buffer contains long lines and large regions of characters with the
5544 same, fixed screen width.
5546 When cache-long-line-scans is non-nil, processing short lines will
5547 become slightly slower (because of the overhead of consulting the
5548 cache), and the caches will use memory roughly proportional to the
5549 number of newlines and characters whose screen width varies.
5551 The caches require no explicit maintenance; their accuracy is
5552 maintained internally by the Emacs primitives. Enabling or disabling
5553 the cache should not affect the behavior of any of the motion
5554 functions; it should only affect their performance. */);
5556 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5557 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5559 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5560 doc
: /* List of formats to use when saving this buffer.
5561 Formats are defined by `format-alist'. This variable is
5562 set when a file is visited. Automatically local in all buffers. */);
5564 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5565 ¤t_buffer
->invisibility_spec
, Qnil
,
5566 doc
: /* Invisibility spec of this buffer.
5567 The default is t, which means that text is invisible
5568 if it has a non-nil `invisible' property.
5569 If the value is a list, a text character is invisible if its `invisible'
5570 property is an element in that list.
5571 If an element is a cons cell of the form (PROP . ELLIPSIS),
5572 then characters with property value PROP are invisible,
5573 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5575 DEFVAR_PER_BUFFER ("buffer-display-count",
5576 ¤t_buffer
->display_count
, Qnil
,
5577 doc
: /* A number incremented each time this buffer is displayed in a window.
5578 The function `set-window-buffer' increments it. */);
5580 DEFVAR_PER_BUFFER ("buffer-display-time",
5581 ¤t_buffer
->display_time
, Qnil
,
5582 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5583 The function `set-window-buffer' updates this variable
5584 to the value obtained by calling `current-time'.
5585 If the buffer has never been shown in a window, the value is nil. */);
5587 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5588 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5589 Non-nil also enables highlighting of the region whenever the mark is active.
5590 The variable `highlight-nonselected-windows' controls whether to highlight
5591 all windows or just the selected window. */);
5592 Vtransient_mark_mode
= Qnil
;
5594 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5595 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5596 If the value is t, disregard `buffer-read-only' and all `read-only'
5597 text properties. If the value is a list, disregard `buffer-read-only'
5598 and disregard a `read-only' text property if the property value
5599 is a member of the list. */);
5600 Vinhibit_read_only
= Qnil
;
5602 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5603 doc
: /* Cursor to use in window displaying this buffer.
5604 Values are interpreted as follows:
5606 t use the cursor specified for the frame
5607 nil don't display a cursor
5608 `bar' display a bar cursor with default width
5609 (bar . WIDTH) display a bar cursor with width WIDTH
5610 others display a box cursor. */);
5612 DEFVAR_PER_BUFFER ("line-spacing",
5613 ¤t_buffer
->extra_line_spacing
, Qnil
,
5614 doc
: /* Additional space to put between lines when displaying a buffer.
5615 The space is measured in pixels, and put below lines on window systems. */);
5617 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5618 doc
: /* List of functions called with no args to query before killing a buffer. */);
5619 Vkill_buffer_query_functions
= Qnil
;
5621 defsubr (&Sbuffer_live_p
);
5622 defsubr (&Sbuffer_list
);
5623 defsubr (&Sget_buffer
);
5624 defsubr (&Sget_file_buffer
);
5625 defsubr (&Sget_buffer_create
);
5626 defsubr (&Smake_indirect_buffer
);
5627 defsubr (&Sgenerate_new_buffer_name
);
5628 defsubr (&Sbuffer_name
);
5629 /*defsubr (&Sbuffer_number);*/
5630 defsubr (&Sbuffer_file_name
);
5631 defsubr (&Sbuffer_base_buffer
);
5632 defsubr (&Sbuffer_local_value
);
5633 defsubr (&Sbuffer_local_variables
);
5634 defsubr (&Sbuffer_modified_p
);
5635 defsubr (&Sset_buffer_modified_p
);
5636 defsubr (&Sbuffer_modified_tick
);
5637 defsubr (&Srename_buffer
);
5638 defsubr (&Sother_buffer
);
5639 defsubr (&Sbuffer_disable_undo
);
5640 defsubr (&Sbuffer_enable_undo
);
5641 defsubr (&Skill_buffer
);
5642 defsubr (&Sset_buffer_major_mode
);
5643 defsubr (&Sswitch_to_buffer
);
5644 defsubr (&Spop_to_buffer
);
5645 defsubr (&Scurrent_buffer
);
5646 defsubr (&Sset_buffer
);
5647 defsubr (&Sbarf_if_buffer_read_only
);
5648 defsubr (&Sbury_buffer
);
5649 defsubr (&Serase_buffer
);
5650 defsubr (&Sset_buffer_multibyte
);
5651 defsubr (&Skill_all_local_variables
);
5653 defsubr (&Soverlayp
);
5654 defsubr (&Smake_overlay
);
5655 defsubr (&Sdelete_overlay
);
5656 defsubr (&Smove_overlay
);
5657 defsubr (&Soverlay_start
);
5658 defsubr (&Soverlay_end
);
5659 defsubr (&Soverlay_buffer
);
5660 defsubr (&Soverlay_properties
);
5661 defsubr (&Soverlays_at
);
5662 defsubr (&Soverlays_in
);
5663 defsubr (&Snext_overlay_change
);
5664 defsubr (&Sprevious_overlay_change
);
5665 defsubr (&Soverlay_recenter
);
5666 defsubr (&Soverlay_lists
);
5667 defsubr (&Soverlay_get
);
5668 defsubr (&Soverlay_put
);
5669 defsubr (&Srestore_buffer_modified_p
);
5675 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
5676 initial_define_key (control_x_map
, 'k', "kill-buffer");
5678 /* This must not be in syms_of_buffer, because Qdisabled is not
5679 initialized when that function gets called. */
5680 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);