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
))
1903 if (NILP (Fwindow_dedicated_p (selected_window
)))
1904 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1905 else if (NILP (XWINDOW (selected_window
)->parent
))
1906 Ficonify_frame (Fwindow_frame (selected_window
));
1908 Fdelete_window (selected_window
);
1914 buf1
= Fget_buffer (buffer
);
1920 /* Move buffer to the end of the buffer list. Do nothing if the
1921 buffer is killed. */
1922 if (!NILP (XBUFFER (buffer
)->name
))
1924 Lisp_Object aelt
, link
;
1926 aelt
= Frassq (buffer
, Vbuffer_alist
);
1927 link
= Fmemq (aelt
, Vbuffer_alist
);
1928 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1929 XSETCDR (link
, Qnil
);
1930 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1932 frames_bury_buffer (buffer
);
1938 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1939 doc
: /* Delete the entire contents of the current buffer.
1940 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1941 so the buffer is truly empty after this. */)
1948 current_buffer
->last_window_start
= 1;
1949 /* Prevent warnings, or suspension of auto saving, that would happen
1950 if future size is less than past size. Use of erase-buffer
1951 implies that the future text is not really related to the past text. */
1952 XSETFASTINT (current_buffer
->save_length
, 0);
1957 validate_region (b
, e
)
1958 register Lisp_Object
*b
, *e
;
1960 CHECK_NUMBER_COERCE_MARKER (*b
);
1961 CHECK_NUMBER_COERCE_MARKER (*e
);
1963 if (XINT (*b
) > XINT (*e
))
1966 tem
= *b
; *b
= *e
; *e
= tem
;
1969 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1970 && XINT (*e
) <= ZV
))
1971 args_out_of_range (*b
, *e
);
1974 /* Advance BYTE_POS up to a character boundary
1975 and return the adjusted position. */
1978 advance_to_char_boundary (byte_pos
)
1983 if (byte_pos
== BEG
)
1984 /* Beginning of buffer is always a character boundary. */
1987 c
= FETCH_BYTE (byte_pos
);
1988 if (! CHAR_HEAD_P (c
))
1990 /* We should advance BYTE_POS only when C is a constituent of a
1991 multibyte sequence. */
1992 int orig_byte_pos
= byte_pos
;
1997 c
= FETCH_BYTE (byte_pos
);
1999 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2001 if (byte_pos
< orig_byte_pos
)
2002 byte_pos
= orig_byte_pos
;
2003 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2004 surely advance to the correct character boundary. If C is
2005 not, BYTE_POS was unchanged. */
2011 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2013 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2014 If FLAG is t, this makes the buffer a multibyte buffer.
2015 If FLAG is nil, this makes the buffer a single-byte buffer.
2016 The buffer contents remain unchanged as a sequence of bytes
2017 but the contents viewed as characters do change. */)
2021 Lisp_Object tail
, markers
;
2022 struct buffer
*other
;
2023 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2024 int begv
= BEGV
, zv
= ZV
;
2025 int narrowed
= (BEG
!= begv
|| Z
!= zv
);
2026 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2028 if (current_buffer
->base_buffer
)
2029 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2031 /* Do nothing if nothing actually changes. */
2032 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2035 /* It would be better to update the list,
2036 but this is good enough for now. */
2038 current_buffer
->undo_list
= Qt
;
2040 /* If the cached position is for this buffer, clear it out. */
2041 clear_charpos_cache (current_buffer
);
2051 /* Do this first, so it can use CHAR_TO_BYTE
2052 to calculate the old correspondences. */
2053 set_intervals_multibyte (0);
2055 current_buffer
->enable_multibyte_characters
= Qnil
;
2061 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2063 tail
= BUF_MARKERS (current_buffer
);
2064 while (! NILP (tail
))
2066 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
2067 tail
= XMARKER (tail
)->chain
;
2070 /* Convert multibyte form of 8-bit characters to unibyte. */
2085 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2086 p
+= bytes
, pos
+= bytes
;
2089 c
= STRING_CHAR (p
, stop
- pos
);
2090 /* Delete all bytes for this 8-bit character but the
2091 last one, and change the last one to the charcter
2094 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2106 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2114 /* Be sure not to have a multibyte sequence striding over the GAP.
2115 Ex: We change this: "...abc\201 _GAP_ \241def..."
2116 to: "...abc _GAP_ \201\241def..." */
2118 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2119 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2121 unsigned char *p
= GPT_ADDR
- 1;
2123 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2124 if (BASE_LEADING_CODE_P (*p
))
2126 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2128 move_gap_both (new_gpt
, new_gpt
);
2132 /* Make the buffer contents valid as multibyte by converting
2133 8-bit characters to multibyte form. */
2149 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2150 p
+= bytes
, pos
+= bytes
;
2153 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2155 bytes
= CHAR_STRING (*p
, tmp
);
2157 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2159 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2160 /* Now the gap is after the just inserted data. */
2177 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2179 /* Do this first, so that chars_in_text asks the right question.
2180 set_intervals_multibyte needs it too. */
2181 current_buffer
->enable_multibyte_characters
= Qt
;
2183 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2184 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2186 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2188 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2189 if (BEGV_BYTE
> GPT_BYTE
)
2190 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2192 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2194 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2195 if (ZV_BYTE
> GPT_BYTE
)
2196 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2198 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2201 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2204 if (pt_byte
> GPT_BYTE
)
2205 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2207 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2208 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2211 tail
= markers
= BUF_MARKERS (current_buffer
);
2213 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2214 getting confused by the markers that have not yet been updated.
2215 It is also a signal that it should never create a marker. */
2216 BUF_MARKERS (current_buffer
) = Qnil
;
2218 while (! NILP (tail
))
2220 XMARKER (tail
)->bytepos
2221 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
2222 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
2224 tail
= XMARKER (tail
)->chain
;
2227 /* Make sure no markers were put on the chain
2228 while the chain value was incorrect. */
2229 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
2232 BUF_MARKERS (current_buffer
) = markers
;
2234 /* Do this last, so it can calculate the new correspondences
2235 between chars and bytes. */
2236 set_intervals_multibyte (1);
2240 current_buffer
->undo_list
= Qnil
;
2242 /* Changing the multibyteness of a buffer means that all windows
2243 showing that buffer must be updated thoroughly. */
2244 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2245 ++windows_or_buffers_changed
;
2247 /* Copy this buffer's new multibyte status
2248 into all of its indirect buffers. */
2249 for (other
= all_buffers
; other
; other
= other
->next
)
2250 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2252 other
->enable_multibyte_characters
2253 = current_buffer
->enable_multibyte_characters
;
2254 other
->prevent_redisplay_optimizations_p
= 1;
2257 /* Restore the modifiedness of the buffer. */
2258 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2259 Fset_buffer_modified_p (Qnil
);
2264 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2266 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2267 Most local variable bindings are eliminated so that the default values
2268 become effective once more. Also, the syntax table is set from
2269 `standard-syntax-table', the local keymap is set to nil,
2270 and the abbrev table from `fundamental-mode-abbrev-table'.
2271 This function also forces redisplay of the mode line.
2273 Every function to select a new major mode starts by
2274 calling this function.
2276 As a special exception, local variables whose names have
2277 a non-nil `permanent-local' property are not eliminated by this function.
2279 The first thing this function does is run
2280 the normal hook `change-major-mode-hook'. */)
2283 register Lisp_Object alist
, sym
, tem
;
2286 if (!NILP (Vrun_hooks
))
2287 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2288 oalist
= current_buffer
->local_var_alist
;
2290 /* Make sure none of the bindings in oalist
2291 remain swapped in, in their symbols. */
2293 swap_out_buffer_local_variables (current_buffer
);
2295 /* Actually eliminate all local bindings of this buffer. */
2297 reset_buffer_local_variables (current_buffer
, 0);
2299 /* Redisplay mode lines; we are changing major mode. */
2301 update_mode_lines
++;
2303 /* Any which are supposed to be permanent,
2304 make local again, with the same values they had. */
2306 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2308 sym
= XCAR (XCAR (alist
));
2309 tem
= Fget (sym
, Qpermanent_local
);
2312 Fmake_local_variable (sym
);
2313 Fset (sym
, XCDR (XCAR (alist
)));
2317 /* Force mode-line redisplay. Useful here because all major mode
2318 commands call this function. */
2319 update_mode_lines
++;
2324 /* Make sure no local variables remain set up with buffer B
2325 for their current values. */
2328 swap_out_buffer_local_variables (b
)
2331 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2333 XSETBUFFER (buffer
, b
);
2334 oalist
= b
->local_var_alist
;
2336 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2338 sym
= XCAR (XCAR (alist
));
2340 /* Need not do anything if some other buffer's binding is now encached. */
2341 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2342 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2344 /* Symbol is set up for this buffer's old local value.
2345 Set it up for the current buffer with the default value. */
2347 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2348 /* Store the symbol's current value into the alist entry
2349 it is currently set up for. This is so that, if the
2350 local is marked permanent, and we make it local again
2351 later in Fkill_all_local_variables, we don't lose the value. */
2352 XSETCDR (XCAR (tem
),
2353 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2354 /* Switch to the symbol's default-value alist entry. */
2356 /* Mark it as current for buffer B. */
2357 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2358 /* Store the current value into any forwarding in the symbol. */
2359 store_symval_forwarding (sym
,
2360 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2366 /* Find all the overlays in the current buffer that contain position POS.
2367 Return the number found, and store them in a vector in *VEC_PTR.
2368 Store in *LEN_PTR the size allocated for the vector.
2369 Store in *NEXT_PTR the next position after POS where an overlay starts,
2370 or ZV if there are no more overlays.
2371 Store in *PREV_PTR the previous position before POS where an overlay ends,
2372 or where an overlay starts which ends at or after POS;
2373 or BEGV if there are no such overlays.
2374 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2376 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2377 when this function is called.
2379 If EXTEND is non-zero, we make the vector bigger if necessary.
2380 If EXTEND is zero, we never extend the vector,
2381 and we store only as many overlays as will fit.
2382 But we still return the total number of overlays.
2384 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2385 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2386 default (BEGV or ZV). */
2389 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2392 Lisp_Object
**vec_ptr
;
2398 Lisp_Object tail
, overlay
, start
, end
;
2401 Lisp_Object
*vec
= *vec_ptr
;
2404 int inhibit_storing
= 0;
2406 for (tail
= current_buffer
->overlays_before
;
2410 int startpos
, endpos
;
2412 overlay
= XCAR (tail
);
2414 start
= OVERLAY_START (overlay
);
2415 end
= OVERLAY_END (overlay
);
2416 endpos
= OVERLAY_POSITION (end
);
2423 startpos
= OVERLAY_POSITION (start
);
2424 /* This one ends at or after POS
2425 so its start counts for PREV_PTR if it's before POS. */
2426 if (prev
< startpos
&& startpos
< pos
)
2430 if (startpos
<= pos
)
2434 /* The supplied vector is full.
2435 Either make it bigger, or don't store any more in it. */
2438 /* Make it work with an initial len == 0. */
2443 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2447 inhibit_storing
= 1;
2450 if (!inhibit_storing
)
2452 /* Keep counting overlays even if we can't return them all. */
2455 else if (startpos
< next
)
2459 for (tail
= current_buffer
->overlays_after
;
2463 int startpos
, endpos
;
2465 overlay
= XCAR (tail
);
2467 start
= OVERLAY_START (overlay
);
2468 end
= OVERLAY_END (overlay
);
2469 startpos
= OVERLAY_POSITION (start
);
2472 if (startpos
< next
)
2476 endpos
= OVERLAY_POSITION (end
);
2483 *len_ptr
= len
*= 2;
2486 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2490 inhibit_storing
= 1;
2493 if (!inhibit_storing
)
2497 if (startpos
< pos
&& startpos
> prev
)
2500 else if (endpos
< pos
&& endpos
> prev
)
2502 else if (endpos
== pos
&& startpos
> prev
2503 && (!change_req
|| startpos
< pos
))
2514 /* Find all the overlays in the current buffer that overlap the range BEG-END
2515 or are empty at BEG.
2517 Return the number found, and store them in a vector in *VEC_PTR.
2518 Store in *LEN_PTR the size allocated for the vector.
2519 Store in *NEXT_PTR the next position after POS where an overlay starts,
2520 or ZV if there are no more overlays.
2521 Store in *PREV_PTR the previous position before POS where an overlay ends,
2522 or BEGV if there are no previous overlays.
2523 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2525 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2526 when this function is called.
2528 If EXTEND is non-zero, we make the vector bigger if necessary.
2529 If EXTEND is zero, we never extend the vector,
2530 and we store only as many overlays as will fit.
2531 But we still return the total number of overlays. */
2534 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2537 Lisp_Object
**vec_ptr
;
2542 Lisp_Object tail
, overlay
, ostart
, oend
;
2545 Lisp_Object
*vec
= *vec_ptr
;
2548 int inhibit_storing
= 0;
2550 for (tail
= current_buffer
->overlays_before
;
2554 int startpos
, endpos
;
2556 overlay
= XCAR (tail
);
2558 ostart
= OVERLAY_START (overlay
);
2559 oend
= OVERLAY_END (overlay
);
2560 endpos
= OVERLAY_POSITION (oend
);
2567 startpos
= OVERLAY_POSITION (ostart
);
2568 /* Count an interval if it either overlaps the range
2569 or is empty at the start of the range. */
2570 if ((beg
< endpos
&& startpos
< end
)
2571 || (startpos
== endpos
&& beg
== endpos
))
2575 /* The supplied vector is full.
2576 Either make it bigger, or don't store any more in it. */
2579 *len_ptr
= len
*= 2;
2580 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2584 inhibit_storing
= 1;
2587 if (!inhibit_storing
)
2589 /* Keep counting overlays even if we can't return them all. */
2592 else if (startpos
< next
)
2596 for (tail
= current_buffer
->overlays_after
;
2600 int startpos
, endpos
;
2602 overlay
= XCAR (tail
);
2604 ostart
= OVERLAY_START (overlay
);
2605 oend
= OVERLAY_END (overlay
);
2606 startpos
= OVERLAY_POSITION (ostart
);
2609 if (startpos
< next
)
2613 endpos
= OVERLAY_POSITION (oend
);
2614 /* Count an interval if it either overlaps the range
2615 or is empty at the start of the range. */
2616 if ((beg
< endpos
&& startpos
< end
)
2617 || (startpos
== endpos
&& beg
== endpos
))
2623 *len_ptr
= len
*= 2;
2624 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2628 inhibit_storing
= 1;
2631 if (!inhibit_storing
)
2635 else if (endpos
< beg
&& endpos
> prev
)
2647 /* Return non-zero if there exists an overlay with a non-nil
2648 `mouse-face' property overlapping OVERLAY. */
2651 mouse_face_overlay_overlaps (overlay
)
2652 Lisp_Object overlay
;
2654 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2655 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2657 Lisp_Object
*v
, tem
;
2660 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2661 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2664 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2665 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2668 for (i
= 0; i
< n
; ++i
)
2669 if (!EQ (v
[i
], overlay
)
2670 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2679 /* Fast function to just test if we're at an overlay boundary. */
2681 overlay_touches_p (pos
)
2684 Lisp_Object tail
, overlay
;
2686 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2691 overlay
= XCAR (tail
);
2692 if (!GC_OVERLAYP (overlay
))
2695 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2698 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2702 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2707 overlay
= XCAR (tail
);
2708 if (!GC_OVERLAYP (overlay
))
2711 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2714 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2722 Lisp_Object overlay
;
2728 compare_overlays (v1
, v2
)
2729 const void *v1
, *v2
;
2731 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2732 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2733 if (s1
->priority
!= s2
->priority
)
2734 return s1
->priority
- s2
->priority
;
2735 if (s1
->beg
!= s2
->beg
)
2736 return s1
->beg
- s2
->beg
;
2737 if (s1
->end
!= s2
->end
)
2738 return s2
->end
- s1
->end
;
2742 /* Sort an array of overlays by priority. The array is modified in place.
2743 The return value is the new size; this may be smaller than the original
2744 size if some of the overlays were invalid or were window-specific. */
2746 sort_overlays (overlay_vec
, noverlays
, w
)
2747 Lisp_Object
*overlay_vec
;
2752 struct sortvec
*sortvec
;
2753 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2755 /* Put the valid and relevant overlays into sortvec. */
2757 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2760 Lisp_Object overlay
;
2762 overlay
= overlay_vec
[i
];
2763 if (OVERLAY_VALID (overlay
)
2764 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2765 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2767 /* If we're interested in a specific window, then ignore
2768 overlays that are limited to some other window. */
2773 window
= Foverlay_get (overlay
, Qwindow
);
2774 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2778 /* This overlay is good and counts: put it into sortvec. */
2779 sortvec
[j
].overlay
= overlay
;
2780 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2781 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2782 tem
= Foverlay_get (overlay
, Qpriority
);
2784 sortvec
[j
].priority
= XINT (tem
);
2786 sortvec
[j
].priority
= 0;
2792 /* Sort the overlays into the proper order: increasing priority. */
2795 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2797 for (i
= 0; i
< noverlays
; i
++)
2798 overlay_vec
[i
] = sortvec
[i
].overlay
;
2804 Lisp_Object string
, string2
;
2811 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2812 int size
; /* Allocated length of that array. */
2813 int used
; /* How much of the array is currently in use. */
2814 int bytes
; /* Total length of the strings in buf. */
2817 /* Buffers for storing information about the overlays touching a given
2818 position. These could be automatic variables in overlay_strings, but
2819 it's more efficient to hold onto the memory instead of repeatedly
2820 allocating and freeing it. */
2821 static struct sortstrlist overlay_heads
, overlay_tails
;
2822 static unsigned char *overlay_str_buf
;
2824 /* Allocated length of overlay_str_buf. */
2825 static int overlay_str_len
;
2827 /* A comparison function suitable for passing to qsort. */
2829 cmp_for_strings (as1
, as2
)
2832 struct sortstr
*s1
= (struct sortstr
*)as1
;
2833 struct sortstr
*s2
= (struct sortstr
*)as2
;
2834 if (s1
->size
!= s2
->size
)
2835 return s2
->size
- s1
->size
;
2836 if (s1
->priority
!= s2
->priority
)
2837 return s1
->priority
- s2
->priority
;
2842 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2843 struct sortstrlist
*ssl
;
2844 Lisp_Object str
, str2
, pri
;
2849 if (ssl
->used
== ssl
->size
)
2855 ssl
->buf
= ((struct sortstr
*)
2856 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2858 ssl
->buf
[ssl
->used
].string
= str
;
2859 ssl
->buf
[ssl
->used
].string2
= str2
;
2860 ssl
->buf
[ssl
->used
].size
= size
;
2861 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2864 if (NILP (current_buffer
->enable_multibyte_characters
))
2865 nbytes
= XSTRING (str
)->size
;
2866 else if (! STRING_MULTIBYTE (str
))
2867 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2868 STRING_BYTES (XSTRING (str
)));
2870 nbytes
= STRING_BYTES (XSTRING (str
));
2872 ssl
->bytes
+= nbytes
;
2876 if (NILP (current_buffer
->enable_multibyte_characters
))
2877 nbytes
= XSTRING (str2
)->size
;
2878 else if (! STRING_MULTIBYTE (str2
))
2879 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2880 STRING_BYTES (XSTRING (str2
)));
2882 nbytes
= STRING_BYTES (XSTRING (str2
));
2884 ssl
->bytes
+= nbytes
;
2888 /* Return the concatenation of the strings associated with overlays that
2889 begin or end at POS, ignoring overlays that are specific to a window
2890 other than W. The strings are concatenated in the appropriate order:
2891 shorter overlays nest inside longer ones, and higher priority inside
2892 lower. Normally all of the after-strings come first, but zero-sized
2893 overlays have their after-strings ride along with the before-strings
2894 because it would look strange to print them inside-out.
2896 Returns the string length, and stores the contents indirectly through
2897 PSTR, if that variable is non-null. The string may be overwritten by
2898 subsequent calls. */
2901 overlay_strings (pos
, w
, pstr
)
2904 unsigned char **pstr
;
2906 Lisp_Object ov
, overlay
, window
, str
;
2907 int startpos
, endpos
;
2908 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2910 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2911 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2912 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCDR (ov
))
2914 overlay
= XCAR (ov
);
2915 if (!OVERLAYP (overlay
))
2918 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2919 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2922 if (endpos
!= pos
&& startpos
!= pos
)
2924 window
= Foverlay_get (overlay
, Qwindow
);
2925 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2928 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2929 record_overlay_string (&overlay_heads
, str
,
2931 ? Foverlay_get (overlay
, Qafter_string
)
2933 Foverlay_get (overlay
, Qpriority
),
2935 else if (endpos
== pos
2936 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2937 record_overlay_string (&overlay_tails
, str
, Qnil
,
2938 Foverlay_get (overlay
, Qpriority
),
2941 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCDR (ov
))
2943 overlay
= XCAR (ov
);
2944 if (!OVERLAYP (overlay
))
2947 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2948 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2951 if (endpos
!= pos
&& startpos
!= pos
)
2953 window
= Foverlay_get (overlay
, Qwindow
);
2954 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2957 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2958 record_overlay_string (&overlay_heads
, str
,
2960 ? Foverlay_get (overlay
, Qafter_string
)
2962 Foverlay_get (overlay
, Qpriority
),
2964 else if (endpos
== pos
2965 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2966 record_overlay_string (&overlay_tails
, str
, Qnil
,
2967 Foverlay_get (overlay
, Qpriority
),
2970 if (overlay_tails
.used
> 1)
2971 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2973 if (overlay_heads
.used
> 1)
2974 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2976 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2981 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2983 if (total
> overlay_str_len
)
2985 overlay_str_len
= total
;
2986 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2989 p
= overlay_str_buf
;
2990 for (i
= overlay_tails
.used
; --i
>= 0;)
2993 tem
= overlay_tails
.buf
[i
].string
;
2994 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2995 STRING_BYTES (XSTRING (tem
)),
2996 STRING_MULTIBYTE (tem
), multibyte
);
2999 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3002 tem
= overlay_heads
.buf
[i
].string
;
3003 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
3004 STRING_BYTES (XSTRING (tem
)),
3005 STRING_MULTIBYTE (tem
), multibyte
);
3007 tem
= overlay_heads
.buf
[i
].string2
;
3010 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
3011 STRING_BYTES (XSTRING (tem
)),
3012 STRING_MULTIBYTE (tem
), multibyte
);
3016 if (p
!= overlay_str_buf
+ total
)
3019 *pstr
= overlay_str_buf
;
3025 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3028 recenter_overlay_lists (buf
, pos
)
3032 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
3034 /* See if anything in overlays_before should move to overlays_after. */
3036 /* We don't strictly need prev in this loop; it should always be nil.
3037 But we use it for symmetry and in case that should cease to be true
3038 with some future change. */
3040 for (tail
= buf
->overlays_before
;
3042 prev
= tail
, tail
= next
)
3045 overlay
= XCAR (tail
);
3047 /* If the overlay is not valid, get rid of it. */
3048 if (!OVERLAY_VALID (overlay
))
3053 /* Splice the cons cell TAIL out of overlays_before. */
3057 buf
->overlays_before
= next
;
3063 beg
= OVERLAY_START (overlay
);
3064 end
= OVERLAY_END (overlay
);
3066 if (OVERLAY_POSITION (end
) > pos
)
3068 /* OVERLAY needs to be moved. */
3069 int where
= OVERLAY_POSITION (beg
);
3070 Lisp_Object other
, other_prev
;
3072 /* Splice the cons cell TAIL out of overlays_before. */
3074 XSETCDR (prev
, next
);
3076 buf
->overlays_before
= next
;
3078 /* Search thru overlays_after for where to put it. */
3080 for (other
= buf
->overlays_after
;
3082 other_prev
= other
, other
= XCDR (other
))
3084 Lisp_Object otherbeg
, otheroverlay
;
3086 otheroverlay
= XCAR (other
);
3087 if (! OVERLAY_VALID (otheroverlay
))
3090 otherbeg
= OVERLAY_START (otheroverlay
);
3091 if (OVERLAY_POSITION (otherbeg
) >= where
)
3095 /* Add TAIL to overlays_after before OTHER. */
3096 XSETCDR (tail
, other
);
3097 if (!NILP (other_prev
))
3098 XSETCDR (other_prev
, tail
);
3100 buf
->overlays_after
= tail
;
3104 /* We've reached the things that should stay in overlays_before.
3105 All the rest of overlays_before must end even earlier,
3110 /* See if anything in overlays_after should be in overlays_before. */
3112 for (tail
= buf
->overlays_after
;
3114 prev
= tail
, tail
= next
)
3117 overlay
= XCAR (tail
);
3119 /* If the overlay is not valid, get rid of it. */
3120 if (!OVERLAY_VALID (overlay
))
3125 /* Splice the cons cell TAIL out of overlays_after. */
3129 buf
->overlays_after
= next
;
3135 beg
= OVERLAY_START (overlay
);
3136 end
= OVERLAY_END (overlay
);
3138 /* Stop looking, when we know that nothing further
3139 can possibly end before POS. */
3140 if (OVERLAY_POSITION (beg
) > pos
)
3143 if (OVERLAY_POSITION (end
) <= pos
)
3145 /* OVERLAY needs to be moved. */
3146 int where
= OVERLAY_POSITION (end
);
3147 Lisp_Object other
, other_prev
;
3149 /* Splice the cons cell TAIL out of overlays_after. */
3151 XSETCDR (prev
, next
);
3153 buf
->overlays_after
= next
;
3155 /* Search thru overlays_before for where to put it. */
3157 for (other
= buf
->overlays_before
;
3159 other_prev
= other
, other
= XCDR (other
))
3161 Lisp_Object otherend
, otheroverlay
;
3163 otheroverlay
= XCAR (other
);
3164 if (! OVERLAY_VALID (otheroverlay
))
3167 otherend
= OVERLAY_END (otheroverlay
);
3168 if (OVERLAY_POSITION (otherend
) <= where
)
3172 /* Add TAIL to overlays_before before OTHER. */
3173 XSETCDR (tail
, other
);
3174 if (!NILP (other_prev
))
3175 XSETCDR (other_prev
, tail
);
3177 buf
->overlays_before
= tail
;
3182 XSETFASTINT (buf
->overlay_center
, pos
);
3186 adjust_overlays_for_insert (pos
, length
)
3190 /* After an insertion, the lists are still sorted properly,
3191 but we may need to update the value of the overlay center. */
3192 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
3193 XSETFASTINT (current_buffer
->overlay_center
,
3194 XFASTINT (current_buffer
->overlay_center
) + length
);
3198 adjust_overlays_for_delete (pos
, length
)
3202 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
3203 /* The deletion was to our right. No change needed; the before- and
3204 after-lists are still consistent. */
3206 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
3207 /* The deletion was to our left. We need to adjust the center value
3208 to account for the change in position, but the lists are consistent
3209 given the new value. */
3210 XSETFASTINT (current_buffer
->overlay_center
,
3211 XFASTINT (current_buffer
->overlay_center
) - length
);
3213 /* We're right in the middle. There might be things on the after-list
3214 that now belong on the before-list. Recentering will move them,
3215 and also update the center point. */
3216 recenter_overlay_lists (current_buffer
, pos
);
3219 /* Fix up overlays that were garbled as a result of permuting markers
3220 in the range START through END. Any overlay with at least one
3221 endpoint in this range will need to be unlinked from the overlay
3222 list and reinserted in its proper place.
3223 Such an overlay might even have negative size at this point.
3224 If so, we'll reverse the endpoints. Can you think of anything
3225 better to do in this situation? */
3227 fix_overlays_in_range (start
, end
)
3228 register int start
, end
;
3230 Lisp_Object overlay
;
3231 Lisp_Object before_list
, after_list
;
3232 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
3233 int startpos
, endpos
;
3235 /* This algorithm shifts links around instead of consing and GCing.
3236 The loop invariant is that before_list (resp. after_list) is a
3237 well-formed list except that its last element, the one that
3238 *pbefore (resp. *pafter) points to, is still uninitialized.
3239 So it's not a bug that before_list isn't initialized, although
3240 it may look strange. */
3241 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
3243 overlay
= XCAR (*ptail
);
3244 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3247 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3249 || (startpos
>= start
&& startpos
< end
))
3251 /* If the overlay is backwards, fix that now. */
3252 if (startpos
> endpos
)
3255 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3257 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3259 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3261 /* Add it to the end of the wrong list. Later on,
3262 recenter_overlay_lists will move it to the right place. */
3263 if (endpos
< XINT (current_buffer
->overlay_center
))
3266 pafter
= &XCDR (*ptail
);
3271 pbefore
= &XCDR (*ptail
);
3273 *ptail
= XCDR (*ptail
);
3276 ptail
= &XCDR (*ptail
);
3278 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
3280 overlay
= XCAR (*ptail
);
3281 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3282 if (startpos
>= end
)
3284 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3285 if (startpos
>= start
3286 || (endpos
>= start
&& endpos
< end
))
3288 if (startpos
> endpos
)
3291 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3293 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3295 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3297 if (endpos
< XINT (current_buffer
->overlay_center
))
3300 pafter
= &XCDR (*ptail
);
3305 pbefore
= &XCDR (*ptail
);
3307 *ptail
= XCDR (*ptail
);
3310 ptail
= &XCDR (*ptail
);
3313 /* Splice the constructed (wrong) lists into the buffer's lists,
3314 and let the recenter function make it sane again. */
3315 *pbefore
= current_buffer
->overlays_before
;
3316 current_buffer
->overlays_before
= before_list
;
3317 recenter_overlay_lists (current_buffer
,
3318 XINT (current_buffer
->overlay_center
));
3320 *pafter
= current_buffer
->overlays_after
;
3321 current_buffer
->overlays_after
= after_list
;
3322 recenter_overlay_lists (current_buffer
,
3323 XINT (current_buffer
->overlay_center
));
3326 /* We have two types of overlay: the one whose ending marker is
3327 after-insertion-marker (this is the usual case) and the one whose
3328 ending marker is before-insertion-marker. When `overlays_before'
3329 contains overlays of the latter type and the former type in this
3330 order and both overlays end at inserting position, inserting a text
3331 increases only the ending marker of the latter type, which results
3332 in incorrect ordering of `overlays_before'.
3334 This function fixes ordering of overlays in the slot
3335 `overlays_before' of the buffer *BP. Before the insertion, `point'
3336 was at PREV, and now is at POS. */
3339 fix_overlays_before (bp
, prev
, pos
)
3343 Lisp_Object
*tailp
= &bp
->overlays_before
;
3344 Lisp_Object
*right_place
;
3347 /* After the insertion, the several overlays may be in incorrect
3348 order. The possibility is that, in the list `overlays_before',
3349 an overlay which ends at POS appears after an overlay which ends
3350 at PREV. Since POS is greater than PREV, we must fix the
3351 ordering of these overlays, by moving overlays ends at POS before
3352 the overlays ends at PREV. */
3354 /* At first, find a place where disordered overlays should be linked
3355 in. It is where an overlay which end before POS exists. (i.e. an
3356 overlay whose ending marker is after-insertion-marker if disorder
3358 while (!NILP (*tailp
)
3359 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp
))))
3361 tailp
= &XCDR (*tailp
);
3363 /* If we don't find such an overlay,
3364 or the found one ends before PREV,
3365 or the found one is the last one in the list,
3366 we don't have to fix anything. */
3369 || NILP (XCDR (*tailp
)))
3372 right_place
= tailp
;
3373 tailp
= &XCDR (*tailp
);
3375 /* Now, end position of overlays in the list *TAILP should be before
3376 or equal to PREV. In the loop, an overlay which ends at POS is
3377 moved ahead to the place pointed by RIGHT_PLACE. If we found an
3378 overlay which ends before PREV, the remaining overlays are in
3380 while (!NILP (*tailp
))
3382 end
= OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp
)));
3385 { /* This overlay is disordered. */
3386 Lisp_Object found
= *tailp
;
3388 /* Unlink the found overlay. */
3389 *tailp
= XCDR (found
);
3390 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
3391 XCDR (found
) = *right_place
;
3392 /* Link it into the right place. */
3393 *right_place
= found
;
3395 else if (end
== prev
)
3396 tailp
= &XCDR (*tailp
);
3397 else /* No more disordered overlay. */
3402 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3403 doc
: /* Return t if OBJECT is an overlay. */)
3407 return (OVERLAYP (object
) ? Qt
: Qnil
);
3410 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3411 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3412 If omitted, BUFFER defaults to the current buffer.
3413 BEG and END may be integers or markers.
3414 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3415 front delimiter advance when text is inserted there.
3416 The fifth arg REAR-ADVANCE, if non-nil, makes the
3417 rear delimiter advance when text is inserted there. */)
3418 (beg
, end
, buffer
, front_advance
, rear_advance
)
3419 Lisp_Object beg
, end
, buffer
;
3420 Lisp_Object front_advance
, rear_advance
;
3422 Lisp_Object overlay
;
3426 XSETBUFFER (buffer
, current_buffer
);
3428 CHECK_BUFFER (buffer
);
3430 && ! EQ (Fmarker_buffer (beg
), buffer
))
3431 error ("Marker points into wrong buffer");
3433 && ! EQ (Fmarker_buffer (end
), buffer
))
3434 error ("Marker points into wrong buffer");
3436 CHECK_NUMBER_COERCE_MARKER (beg
);
3437 CHECK_NUMBER_COERCE_MARKER (end
);
3439 if (XINT (beg
) > XINT (end
))
3442 temp
= beg
; beg
= end
; end
= temp
;
3445 b
= XBUFFER (buffer
);
3447 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3448 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3450 if (!NILP (front_advance
))
3451 XMARKER (beg
)->insertion_type
= 1;
3452 if (!NILP (rear_advance
))
3453 XMARKER (end
)->insertion_type
= 1;
3455 overlay
= allocate_misc ();
3456 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3457 XOVERLAY (overlay
)->start
= beg
;
3458 XOVERLAY (overlay
)->end
= end
;
3459 XOVERLAY (overlay
)->plist
= Qnil
;
3461 /* Put the new overlay on the wrong list. */
3462 end
= OVERLAY_END (overlay
);
3463 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3464 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3466 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3468 /* This puts it in the right list, and in the right order. */
3469 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3471 /* We don't need to redisplay the region covered by the overlay, because
3472 the overlay has no properties at the moment. */
3477 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3480 modify_overlay (buf
, start
, end
)
3491 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3493 /* If this is a buffer not in the selected window,
3494 we must do other windows. */
3495 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3496 windows_or_buffers_changed
= 1;
3497 /* If multiple windows show this buffer, we must do other windows. */
3498 else if (buffer_shared
> 1)
3499 windows_or_buffers_changed
= 1;
3501 ++BUF_OVERLAY_MODIFF (buf
);
3505 Lisp_Object
Fdelete_overlay ();
3507 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3508 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3509 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3510 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3512 (overlay
, beg
, end
, buffer
)
3513 Lisp_Object overlay
, beg
, end
, buffer
;
3515 struct buffer
*b
, *ob
;
3516 Lisp_Object obuffer
;
3517 int count
= specpdl_ptr
- specpdl
;
3519 CHECK_OVERLAY (overlay
);
3521 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3523 XSETBUFFER (buffer
, current_buffer
);
3524 CHECK_BUFFER (buffer
);
3527 && ! EQ (Fmarker_buffer (beg
), buffer
))
3528 error ("Marker points into wrong buffer");
3530 && ! EQ (Fmarker_buffer (end
), buffer
))
3531 error ("Marker points into wrong buffer");
3533 CHECK_NUMBER_COERCE_MARKER (beg
);
3534 CHECK_NUMBER_COERCE_MARKER (end
);
3536 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3537 return Fdelete_overlay (overlay
);
3539 if (XINT (beg
) > XINT (end
))
3542 temp
= beg
; beg
= end
; end
= temp
;
3545 specbind (Qinhibit_quit
, Qt
);
3547 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3548 b
= XBUFFER (buffer
);
3549 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3551 /* If the overlay has changed buffers, do a thorough redisplay. */
3552 if (!EQ (buffer
, obuffer
))
3554 /* Redisplay where the overlay was. */
3555 if (!NILP (obuffer
))
3560 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3561 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3563 modify_overlay (ob
, o_beg
, o_end
);
3566 /* Redisplay where the overlay is going to be. */
3567 modify_overlay (b
, XINT (beg
), XINT (end
));
3570 /* Redisplay the area the overlay has just left, or just enclosed. */
3574 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3575 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3577 if (o_beg
== XINT (beg
))
3578 modify_overlay (b
, o_end
, XINT (end
));
3579 else if (o_end
== XINT (end
))
3580 modify_overlay (b
, o_beg
, XINT (beg
));
3583 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3584 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3585 modify_overlay (b
, o_beg
, o_end
);
3589 if (!NILP (obuffer
))
3591 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3592 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3595 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3596 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3598 /* Put the overlay on the wrong list. */
3599 end
= OVERLAY_END (overlay
);
3600 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3601 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3603 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3605 /* This puts it in the right list, and in the right order. */
3606 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3608 return unbind_to (count
, overlay
);
3611 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3612 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3614 Lisp_Object overlay
;
3618 int count
= specpdl_ptr
- specpdl
;
3620 CHECK_OVERLAY (overlay
);
3622 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3626 b
= XBUFFER (buffer
);
3627 specbind (Qinhibit_quit
, Qt
);
3629 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3630 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3632 marker_position (OVERLAY_START (overlay
)),
3633 marker_position (OVERLAY_END (overlay
)));
3634 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3635 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3637 /* When deleting an overlay with before or after strings, turn off
3638 display optimizations for the affected buffer, on the basis that
3639 these strings may contain newlines. This is easier to do than to
3640 check for that situation during redisplay. */
3641 if (!windows_or_buffers_changed
3642 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3643 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3644 b
->prevent_redisplay_optimizations_p
= 1;
3646 return unbind_to (count
, Qnil
);
3649 /* Overlay dissection functions. */
3651 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3652 doc
: /* Return the position at which OVERLAY starts. */)
3654 Lisp_Object overlay
;
3656 CHECK_OVERLAY (overlay
);
3658 return (Fmarker_position (OVERLAY_START (overlay
)));
3661 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3662 doc
: /* Return the position at which OVERLAY ends. */)
3664 Lisp_Object overlay
;
3666 CHECK_OVERLAY (overlay
);
3668 return (Fmarker_position (OVERLAY_END (overlay
)));
3671 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3672 doc
: /* Return the buffer OVERLAY belongs to. */)
3674 Lisp_Object overlay
;
3676 CHECK_OVERLAY (overlay
);
3678 return Fmarker_buffer (OVERLAY_START (overlay
));
3681 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3682 doc
: /* Return a list of the properties on OVERLAY.
3683 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3686 Lisp_Object overlay
;
3688 CHECK_OVERLAY (overlay
);
3690 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3694 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3695 doc
: /* Return a list of the overlays that contain position POS. */)
3700 Lisp_Object
*overlay_vec
;
3704 CHECK_NUMBER_COERCE_MARKER (pos
);
3707 /* We can't use alloca here because overlays_at can call xrealloc. */
3708 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3710 /* Put all the overlays we want in a vector in overlay_vec.
3711 Store the length in len. */
3712 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3713 (int *) 0, (int *) 0, 0);
3715 /* Make a list of them all. */
3716 result
= Flist (noverlays
, overlay_vec
);
3718 xfree (overlay_vec
);
3722 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3723 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3724 Overlap means that at least one character is contained within the overlay
3725 and also contained within the specified region.
3726 Empty overlays are included in the result if they are located at BEG
3727 or between BEG and END. */)
3729 Lisp_Object beg
, end
;
3732 Lisp_Object
*overlay_vec
;
3736 CHECK_NUMBER_COERCE_MARKER (beg
);
3737 CHECK_NUMBER_COERCE_MARKER (end
);
3740 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3742 /* Put all the overlays we want in a vector in overlay_vec.
3743 Store the length in len. */
3744 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3745 (int *) 0, (int *) 0);
3747 /* Make a list of them all. */
3748 result
= Flist (noverlays
, overlay_vec
);
3750 xfree (overlay_vec
);
3754 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3756 doc
: /* Return the next position after POS where an overlay starts or ends.
3757 If there are no more overlay boundaries after POS, return (point-max). */)
3763 Lisp_Object
*overlay_vec
;
3767 CHECK_NUMBER_COERCE_MARKER (pos
);
3770 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3772 /* Put all the overlays we want in a vector in overlay_vec.
3773 Store the length in len.
3774 endpos gets the position where the next overlay starts. */
3775 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3776 &endpos
, (int *) 0, 1);
3778 /* If any of these overlays ends before endpos,
3779 use its ending point instead. */
3780 for (i
= 0; i
< noverlays
; i
++)
3785 oend
= OVERLAY_END (overlay_vec
[i
]);
3786 oendpos
= OVERLAY_POSITION (oend
);
3787 if (oendpos
< endpos
)
3791 xfree (overlay_vec
);
3792 return make_number (endpos
);
3795 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3796 Sprevious_overlay_change
, 1, 1, 0,
3797 doc
: /* Return the previous position before POS where an overlay starts or ends.
3798 If there are no more overlay boundaries before POS, return (point-min). */)
3804 Lisp_Object
*overlay_vec
;
3807 CHECK_NUMBER_COERCE_MARKER (pos
);
3809 /* At beginning of buffer, we know the answer;
3810 avoid bug subtracting 1 below. */
3811 if (XINT (pos
) == BEGV
)
3815 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3817 /* Put all the overlays we want in a vector in overlay_vec.
3818 Store the length in len.
3819 prevpos gets the position of the previous change. */
3820 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3821 (int *) 0, &prevpos
, 1);
3823 xfree (overlay_vec
);
3824 return make_number (prevpos
);
3827 /* These functions are for debugging overlays. */
3829 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3830 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3831 The car has all the overlays before the overlay center;
3832 the cdr has all the overlays after the overlay center.
3833 Recentering overlays moves overlays between these lists.
3834 The lists you get are copies, so that changing them has no effect.
3835 However, the overlays you get are the real objects that the buffer uses. */)
3838 Lisp_Object before
, after
;
3839 before
= current_buffer
->overlays_before
;
3841 before
= Fcopy_sequence (before
);
3842 after
= current_buffer
->overlays_after
;
3844 after
= Fcopy_sequence (after
);
3846 return Fcons (before
, after
);
3849 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3850 doc
: /* Recenter the overlays of the current buffer around position POS. */)
3854 CHECK_NUMBER_COERCE_MARKER (pos
);
3856 recenter_overlay_lists (current_buffer
, XINT (pos
));
3860 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3861 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
3863 Lisp_Object overlay
, prop
;
3865 Lisp_Object plist
, fallback
;
3867 CHECK_OVERLAY (overlay
);
3871 for (plist
= XOVERLAY (overlay
)->plist
;
3872 CONSP (plist
) && CONSP (XCDR (plist
));
3873 plist
= XCDR (XCDR (plist
)))
3875 if (EQ (XCAR (plist
), prop
))
3876 return XCAR (XCDR (plist
));
3877 else if (EQ (XCAR (plist
), Qcategory
))
3880 tem
= Fcar (Fcdr (plist
));
3882 fallback
= Fget (tem
, prop
);
3889 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3890 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
3891 (overlay
, prop
, value
)
3892 Lisp_Object overlay
, prop
, value
;
3894 Lisp_Object tail
, buffer
;
3897 CHECK_OVERLAY (overlay
);
3899 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3901 for (tail
= XOVERLAY (overlay
)->plist
;
3902 CONSP (tail
) && CONSP (XCDR (tail
));
3903 tail
= XCDR (XCDR (tail
)))
3904 if (EQ (XCAR (tail
), prop
))
3906 changed
= !EQ (XCAR (XCDR (tail
)), value
);
3907 XSETCAR (XCDR (tail
), value
);
3910 /* It wasn't in the list, so add it to the front. */
3911 changed
= !NILP (value
);
3912 XOVERLAY (overlay
)->plist
3913 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3915 if (! NILP (buffer
))
3918 modify_overlay (XBUFFER (buffer
),
3919 marker_position (OVERLAY_START (overlay
)),
3920 marker_position (OVERLAY_END (overlay
)));
3921 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3922 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3923 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3924 Fdelete_overlay (overlay
);
3929 /* Subroutine of report_overlay_modification. */
3931 /* Lisp vector holding overlay hook functions to call.
3932 Vector elements come in pairs.
3933 Each even-index element is a list of hook functions.
3934 The following odd-index element is the overlay they came from.
3936 Before the buffer change, we fill in this vector
3937 as we call overlay hook functions.
3938 After the buffer change, we get the functions to call from this vector.
3939 This way we always call the same functions before and after the change. */
3940 static Lisp_Object last_overlay_modification_hooks
;
3942 /* Number of elements actually used in last_overlay_modification_hooks. */
3943 static int last_overlay_modification_hooks_used
;
3945 /* Add one functionlist/overlay pair
3946 to the end of last_overlay_modification_hooks. */
3949 add_overlay_mod_hooklist (functionlist
, overlay
)
3950 Lisp_Object functionlist
, overlay
;
3952 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3954 if (last_overlay_modification_hooks_used
== oldsize
)
3957 old
= last_overlay_modification_hooks
;
3958 last_overlay_modification_hooks
3959 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3960 bcopy (XVECTOR (old
)->contents
,
3961 XVECTOR (last_overlay_modification_hooks
)->contents
,
3962 sizeof (Lisp_Object
) * oldsize
);
3964 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3965 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3968 /* Run the modification-hooks of overlays that include
3969 any part of the text in START to END.
3970 If this change is an insertion, also
3971 run the insert-before-hooks of overlay starting at END,
3972 and the insert-after-hooks of overlay ending at START.
3974 This is called both before and after the modification.
3975 AFTER is nonzero when we call after the modification.
3977 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3978 When AFTER is nonzero, they are the start position,
3979 the position after the inserted new text,
3980 and the length of deleted or replaced old text. */
3983 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3984 Lisp_Object start
, end
;
3986 Lisp_Object arg1
, arg2
, arg3
;
3988 Lisp_Object prop
, overlay
, tail
;
3989 /* 1 if this change is an insertion. */
3990 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3992 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3996 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
4000 /* Call the functions recorded in last_overlay_modification_hooks
4001 rather than scanning the overlays again.
4002 First copy the vector contents, in case some of these hooks
4003 do subsequent modification of the buffer. */
4004 int size
= last_overlay_modification_hooks_used
;
4005 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4008 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4009 copy
, size
* sizeof (Lisp_Object
));
4011 gcpro1
.nvars
= size
;
4013 for (i
= 0; i
< size
;)
4015 Lisp_Object prop
, overlay
;
4017 overlay
= copy
[i
++];
4018 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4024 /* We are being called before a change.
4025 Scan the overlays to find the functions to call. */
4026 last_overlay_modification_hooks_used
= 0;
4028 for (tail
= current_buffer
->overlays_before
;
4032 int startpos
, endpos
;
4033 Lisp_Object ostart
, oend
;
4035 overlay
= XCAR (tail
);
4037 ostart
= OVERLAY_START (overlay
);
4038 oend
= OVERLAY_END (overlay
);
4039 endpos
= OVERLAY_POSITION (oend
);
4040 if (XFASTINT (start
) > endpos
)
4042 startpos
= OVERLAY_POSITION (ostart
);
4043 if (insertion
&& (XFASTINT (start
) == startpos
4044 || XFASTINT (end
) == startpos
))
4046 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4049 /* Copy TAIL in case the hook recenters the overlay lists. */
4051 tail
= Fcopy_sequence (tail
);
4053 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4056 if (insertion
&& (XFASTINT (start
) == endpos
4057 || XFASTINT (end
) == endpos
))
4059 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4063 tail
= Fcopy_sequence (tail
);
4065 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4068 /* Test for intersecting intervals. This does the right thing
4069 for both insertion and deletion. */
4070 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4072 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4076 tail
= Fcopy_sequence (tail
);
4078 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4084 for (tail
= current_buffer
->overlays_after
;
4088 int startpos
, endpos
;
4089 Lisp_Object ostart
, oend
;
4091 overlay
= XCAR (tail
);
4093 ostart
= OVERLAY_START (overlay
);
4094 oend
= OVERLAY_END (overlay
);
4095 startpos
= OVERLAY_POSITION (ostart
);
4096 endpos
= OVERLAY_POSITION (oend
);
4097 if (XFASTINT (end
) < startpos
)
4099 if (insertion
&& (XFASTINT (start
) == startpos
4100 || XFASTINT (end
) == startpos
))
4102 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4106 tail
= Fcopy_sequence (tail
);
4108 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4111 if (insertion
&& (XFASTINT (start
) == endpos
4112 || XFASTINT (end
) == endpos
))
4114 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4118 tail
= Fcopy_sequence (tail
);
4120 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4123 /* Test for intersecting intervals. This does the right thing
4124 for both insertion and deletion. */
4125 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4127 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4131 tail
= Fcopy_sequence (tail
);
4133 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4142 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4143 Lisp_Object list
, overlay
;
4145 Lisp_Object arg1
, arg2
, arg3
;
4147 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4149 GCPRO4 (list
, arg1
, arg2
, arg3
);
4151 add_overlay_mod_hooklist (list
, overlay
);
4153 while (!NILP (list
))
4156 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4158 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4164 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4167 evaporate_overlays (pos
)
4170 Lisp_Object tail
, overlay
, hit_list
;
4173 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
4174 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
4178 overlay
= XCAR (tail
);
4179 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4182 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4183 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4184 hit_list
= Fcons (overlay
, hit_list
);
4187 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
4191 overlay
= XCAR (tail
);
4192 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4195 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4196 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4197 hit_list
= Fcons (overlay
, hit_list
);
4199 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4200 Fdelete_overlay (XCAR (hit_list
));
4203 /* Somebody has tried to store a value with an unacceptable type
4204 in the slot with offset OFFSET. */
4207 buffer_slot_type_mismatch (offset
)
4213 switch (XINT (PER_BUFFER_TYPE (offset
)))
4216 type_name
= "integers";
4220 type_name
= "strings";
4224 type_name
= "symbols";
4231 sym
= PER_BUFFER_SYMBOL (offset
);
4232 error ("Only %s should be stored in the buffer-local variable %s",
4233 type_name
, XSYMBOL (sym
)->name
->data
);
4237 /***********************************************************************
4238 Allocation with mmap
4239 ***********************************************************************/
4241 #ifdef USE_MMAP_FOR_BUFFERS
4243 #include <sys/types.h>
4244 #include <sys/mman.h>
4247 #ifdef MAP_ANONYMOUS
4248 #define MAP_ANON MAP_ANONYMOUS
4255 #define MAP_FAILED ((void *) -1)
4268 /* Memory is allocated in regions which are mapped using mmap(2).
4269 The current implementation lets the system select mapped
4270 addresses; we're not using MAP_FIXED in general, except when
4271 trying to enlarge regions.
4273 Each mapped region starts with a mmap_region structure, the user
4274 area starts after that structure, aligned to MEM_ALIGN.
4276 +-----------------------+
4277 | struct mmap_info + |
4279 +-----------------------+
4283 +-----------------------+ */
4287 /* User-specified size. */
4288 size_t nbytes_specified
;
4290 /* Number of bytes mapped */
4291 size_t nbytes_mapped
;
4293 /* Pointer to the location holding the address of the memory
4294 allocated with the mmap'd block. The variable actually points
4295 after this structure. */
4298 /* Next and previous in list of all mmap'd regions. */
4299 struct mmap_region
*next
, *prev
;
4302 /* Doubly-linked list of mmap'd regions. */
4304 static struct mmap_region
*mmap_regions
;
4306 /* File descriptor for mmap. If we don't have anonymous mapping,
4307 /dev/zero will be opened on it. */
4311 /* Temporary storage for mmap_set_vars, see there. */
4313 static struct mmap_region
*mmap_regions_1
;
4314 static int mmap_fd_1
;
4316 /* Page size on this system. */
4318 static int mmap_page_size
;
4320 /* 1 means mmap has been intialized. */
4322 static int mmap_initialized_p
;
4324 /* Value is X rounded up to the next multiple of N. */
4326 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4328 /* Size of mmap_region structure plus padding. */
4330 #define MMAP_REGION_STRUCT_SIZE \
4331 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4333 /* Given a pointer P to the start of the user-visible part of a mapped
4334 region, return a pointer to the start of the region. */
4336 #define MMAP_REGION(P) \
4337 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4339 /* Given a pointer P to the start of a mapped region, return a pointer
4340 to the start of the user-visible part of the region. */
4342 #define MMAP_USER_AREA(P) \
4343 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4345 #define MEM_ALIGN sizeof (double)
4347 /* Function prototypes. */
4349 static int mmap_free_1
P_ ((struct mmap_region
*));
4350 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4351 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4352 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4353 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4354 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4355 static void mmap_init
P_ ((void));
4358 /* Return a region overlapping address range START...END, or null if
4359 none. END is not including, i.e. the last byte in the range
4362 static struct mmap_region
*
4363 mmap_find (start
, end
)
4364 POINTER_TYPE
*start
, *end
;
4366 struct mmap_region
*r
;
4367 char *s
= (char *) start
, *e
= (char *) end
;
4369 for (r
= mmap_regions
; r
; r
= r
->next
)
4371 char *rstart
= (char *) r
;
4372 char *rend
= rstart
+ r
->nbytes_mapped
;
4374 if (/* First byte of range, i.e. START, in this region? */
4375 (s
>= rstart
&& s
< rend
)
4376 /* Last byte of range, i.e. END - 1, in this region? */
4377 || (e
> rstart
&& e
<= rend
)
4378 /* First byte of this region in the range? */
4379 || (rstart
>= s
&& rstart
< e
)
4380 /* Last byte of this region in the range? */
4381 || (rend
> s
&& rend
<= e
))
4389 /* Unmap a region. P is a pointer to the start of the user-araa of
4390 the region. Value is non-zero if successful. */
4394 struct mmap_region
*r
;
4397 r
->next
->prev
= r
->prev
;
4399 r
->prev
->next
= r
->next
;
4401 mmap_regions
= r
->next
;
4403 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4405 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4413 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4414 Value is non-zero if successful. */
4417 mmap_enlarge (r
, npages
)
4418 struct mmap_region
*r
;
4421 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4427 /* Unmap pages at the end of the region. */
4428 nbytes
= - npages
* mmap_page_size
;
4429 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4430 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4433 r
->nbytes_mapped
-= nbytes
;
4437 else if (npages
> 0)
4439 struct mmap_region
*r2
;
4441 nbytes
= npages
* mmap_page_size
;
4443 /* Try to map additional pages at the end of the region. We
4444 cannot do this if the address range is already occupied by
4445 something else because mmap deletes any previous mapping.
4446 I'm not sure this is worth doing, let's see. */
4447 r2
= mmap_find (region_end
, region_end
+ nbytes
);
4452 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4453 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4454 if (p
== MAP_FAILED
)
4455 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4456 else if (p
!= (POINTER_TYPE
*) region_end
)
4458 /* Kernels are free to choose a different address. In
4459 that case, unmap what we've mapped above; we have
4461 if (munmap (p
, nbytes
) == -1)
4462 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4466 r
->nbytes_mapped
+= nbytes
;
4476 /* Set or reset variables holding references to mapped regions. If
4477 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4478 non-zero, set all variables to the start of the user-areas
4481 This function is called from Fdump_emacs to ensure that the dumped
4482 Emacs doesn't contain references to memory that won't be mapped
4483 when Emacs starts. */
4486 mmap_set_vars (restore_p
)
4489 struct mmap_region
*r
;
4493 mmap_regions
= mmap_regions_1
;
4494 mmap_fd
= mmap_fd_1
;
4495 for (r
= mmap_regions
; r
; r
= r
->next
)
4496 *r
->var
= MMAP_USER_AREA (r
);
4500 for (r
= mmap_regions
; r
; r
= r
->next
)
4502 mmap_regions_1
= mmap_regions
;
4503 mmap_regions
= NULL
;
4504 mmap_fd_1
= mmap_fd
;
4510 /* Allocate a block of storage large enough to hold NBYTES bytes of
4511 data. A pointer to the data is returned in *VAR. VAR is thus the
4512 address of some variable which will use the data area.
4514 The allocation of 0 bytes is valid.
4516 If we can't allocate the necessary memory, set *VAR to null, and
4519 static POINTER_TYPE
*
4520 mmap_alloc (var
, nbytes
)
4529 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4530 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4533 if (p
== MAP_FAILED
)
4535 if (errno
!= ENOMEM
)
4536 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4541 struct mmap_region
*r
= (struct mmap_region
*) p
;
4543 r
->nbytes_specified
= nbytes
;
4544 r
->nbytes_mapped
= map
;
4547 r
->next
= mmap_regions
;
4552 p
= MMAP_USER_AREA (p
);
4559 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4560 resize it to size NBYTES. Change *VAR to reflect the new block,
4561 and return this value. If more memory cannot be allocated, then
4562 leave *VAR unchanged, and return null. */
4564 static POINTER_TYPE
*
4565 mmap_realloc (var
, nbytes
)
4569 POINTER_TYPE
*result
;
4574 result
= mmap_alloc (var
, nbytes
);
4575 else if (nbytes
== 0)
4578 result
= mmap_alloc (var
, nbytes
);
4582 struct mmap_region
*r
= MMAP_REGION (*var
);
4583 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4588 POINTER_TYPE
*old_ptr
= *var
;
4590 /* Try to map additional pages at the end of the region.
4591 If that fails, allocate a new region, copy data
4592 from the old region, then free it. */
4593 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4596 r
->nbytes_specified
= nbytes
;
4597 *var
= result
= old_ptr
;
4599 else if (mmap_alloc (var
, nbytes
))
4601 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4602 mmap_free_1 (MMAP_REGION (old_ptr
));
4604 r
= MMAP_REGION (result
);
4605 r
->nbytes_specified
= nbytes
;
4613 else if (room
- nbytes
>= mmap_page_size
)
4615 /* Shrinking by at least a page. Let's give some
4616 memory back to the system. */
4617 mmap_enlarge (r
, - (room
- nbytes
) / mmap_page_size
);
4619 r
->nbytes_specified
= nbytes
;
4623 /* Leave it alone. */
4625 r
->nbytes_specified
= nbytes
;
4633 /* Free a block of relocatable storage whose data is pointed to by
4634 PTR. Store 0 in *PTR to show there's no block allocated. */
4644 mmap_free_1 (MMAP_REGION (*var
));
4650 /* Perform necessary intializations for the use of mmap. */
4656 /* The value of mmap_fd is initially 0 in temacs, and -1
4657 in a dumped Emacs. */
4660 /* No anonymous mmap -- we need the file descriptor. */
4661 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4663 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4665 #endif /* MAP_ANON == 0 */
4667 if (mmap_initialized_p
)
4669 mmap_initialized_p
= 1;
4675 mmap_page_size
= getpagesize ();
4678 #endif /* USE_MMAP_FOR_BUFFERS */
4682 /***********************************************************************
4683 Buffer-text Allocation
4684 ***********************************************************************/
4687 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4688 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4689 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4690 #endif /* REL_ALLOC */
4693 /* Allocate NBYTES bytes for buffer B's text buffer. */
4696 alloc_buffer_text (b
, nbytes
)
4703 #if defined USE_MMAP_FOR_BUFFERS
4704 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4705 #elif defined REL_ALLOC
4706 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4708 p
= xmalloc (nbytes
);
4717 b
->text
->beg
= (unsigned char *) p
;
4721 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4725 enlarge_buffer_text (b
, delta
)
4730 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4733 #if defined USE_MMAP_FOR_BUFFERS
4734 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4735 #elif defined REL_ALLOC
4736 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4738 p
= xrealloc (b
->text
->beg
, nbytes
);
4747 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4752 /* Free buffer B's text buffer. */
4755 free_buffer_text (b
)
4760 #if defined USE_MMAP_FOR_BUFFERS
4761 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4762 #elif defined REL_ALLOC
4763 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4765 xfree (b
->text
->beg
);
4768 BUF_BEG_ADDR (b
) = NULL
;
4774 /***********************************************************************
4776 ***********************************************************************/
4783 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4785 /* Make sure all markable slots in buffer_defaults
4786 are initialized reasonably, so mark_buffer won't choke. */
4787 reset_buffer (&buffer_defaults
);
4788 reset_buffer_local_variables (&buffer_defaults
, 1);
4789 reset_buffer (&buffer_local_symbols
);
4790 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4791 /* Prevent GC from getting confused. */
4792 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4793 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4794 BUF_INTERVALS (&buffer_defaults
) = 0;
4795 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4796 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4797 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4799 /* Set up the default values of various buffer slots. */
4800 /* Must do these before making the first buffer! */
4802 /* real setup is done in bindings.el */
4803 buffer_defaults
.mode_line_format
= build_string ("%-");
4804 buffer_defaults
.header_line_format
= Qnil
;
4805 buffer_defaults
.abbrev_mode
= Qnil
;
4806 buffer_defaults
.overwrite_mode
= Qnil
;
4807 buffer_defaults
.case_fold_search
= Qt
;
4808 buffer_defaults
.auto_fill_function
= Qnil
;
4809 buffer_defaults
.selective_display
= Qnil
;
4811 buffer_defaults
.selective_display_ellipses
= Qt
;
4813 buffer_defaults
.abbrev_table
= Qnil
;
4814 buffer_defaults
.display_table
= Qnil
;
4815 buffer_defaults
.undo_list
= Qnil
;
4816 buffer_defaults
.mark_active
= Qnil
;
4817 buffer_defaults
.file_format
= Qnil
;
4818 buffer_defaults
.overlays_before
= Qnil
;
4819 buffer_defaults
.overlays_after
= Qnil
;
4820 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
4822 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4823 buffer_defaults
.truncate_lines
= Qnil
;
4824 buffer_defaults
.ctl_arrow
= Qt
;
4825 buffer_defaults
.direction_reversed
= Qnil
;
4826 buffer_defaults
.cursor_type
= Qt
;
4827 buffer_defaults
.extra_line_spacing
= Qnil
;
4830 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4832 buffer_defaults
.enable_multibyte_characters
= Qt
;
4833 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4834 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4835 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4836 buffer_defaults
.cache_long_line_scans
= Qnil
;
4837 buffer_defaults
.file_truename
= Qnil
;
4838 XSETFASTINT (buffer_defaults
.display_count
, 0);
4839 buffer_defaults
.indicate_empty_lines
= Qnil
;
4840 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4841 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4842 buffer_defaults
.display_time
= Qnil
;
4844 /* Assign the local-flags to the slots that have default values.
4845 The local flag is a bit that is used in the buffer
4846 to say that it has its own local value for the slot.
4847 The local flag bits are in the local_var_flags slot of the buffer. */
4849 /* Nothing can work if this isn't true */
4850 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4852 /* 0 means not a lisp var, -1 means always local, else mask */
4853 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4854 XSETINT (buffer_local_flags
.filename
, -1);
4855 XSETINT (buffer_local_flags
.directory
, -1);
4856 XSETINT (buffer_local_flags
.backed_up
, -1);
4857 XSETINT (buffer_local_flags
.save_length
, -1);
4858 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
4859 XSETINT (buffer_local_flags
.read_only
, -1);
4860 XSETINT (buffer_local_flags
.major_mode
, -1);
4861 XSETINT (buffer_local_flags
.mode_name
, -1);
4862 XSETINT (buffer_local_flags
.undo_list
, -1);
4863 XSETINT (buffer_local_flags
.mark_active
, -1);
4864 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
4865 XSETINT (buffer_local_flags
.file_truename
, -1);
4866 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
4867 XSETINT (buffer_local_flags
.file_format
, -1);
4868 XSETINT (buffer_local_flags
.display_count
, -1);
4869 XSETINT (buffer_local_flags
.display_time
, -1);
4870 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
4873 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
4874 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
4875 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
4876 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
4877 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
4878 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
4880 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
4882 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
4883 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
4884 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
4885 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
4886 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
4887 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
4888 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
4890 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
4891 /* Make this one a permanent local. */
4892 buffer_permanent_local_flags
[idx
++] = 1;
4894 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
4895 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
4896 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
4897 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
4898 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
4899 /* Make this one a permanent local. */
4900 buffer_permanent_local_flags
[idx
++] = 1;
4901 XSETFASTINT (buffer_local_flags
.left_margin_width
, idx
); ++idx
;
4902 XSETFASTINT (buffer_local_flags
.right_margin_width
, idx
); ++idx
;
4903 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
4904 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
4905 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
4906 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
4907 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
4908 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
4910 /* Need more room? */
4911 if (idx
>= MAX_PER_BUFFER_VARS
)
4913 last_per_buffer_idx
= idx
;
4915 Vbuffer_alist
= Qnil
;
4919 QSFundamental
= build_string ("Fundamental");
4921 Qfundamental_mode
= intern ("fundamental-mode");
4922 buffer_defaults
.major_mode
= Qfundamental_mode
;
4924 Qmode_class
= intern ("mode-class");
4926 Qprotected_field
= intern ("protected-field");
4928 Qpermanent_local
= intern ("permanent-local");
4930 Qkill_buffer_hook
= intern ("kill-buffer-hook");
4932 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
4934 /* super-magic invisible buffer */
4935 Vbuffer_alist
= Qnil
;
4937 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4939 inhibit_modification_hooks
= 0;
4945 char buf
[MAXPATHLEN
+ 1];
4947 struct stat dotstat
, pwdstat
;
4951 #ifdef USE_MMAP_FOR_BUFFERS
4953 /* When using the ralloc implementation based on mmap(2), buffer
4954 text pointers will have been set to null in the dumped Emacs.
4958 for (b
= all_buffers
; b
; b
= b
->next
)
4959 if (b
->text
->beg
== NULL
)
4960 enlarge_buffer_text (b
, 0);
4962 #endif /* USE_MMAP_FOR_BUFFERS */
4964 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4965 if (NILP (buffer_defaults
.enable_multibyte_characters
))
4966 Fset_buffer_multibyte (Qnil
);
4968 /* If PWD is accurate, use it instead of calling getwd. This is faster
4969 when PWD is right, and may avoid a fatal error. */
4970 if ((pwd
= getenv ("PWD")) != 0
4971 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
4972 && stat (pwd
, &pwdstat
) == 0
4973 && stat (".", &dotstat
) == 0
4974 && dotstat
.st_ino
== pwdstat
.st_ino
4975 && dotstat
.st_dev
== pwdstat
.st_dev
4976 && strlen (pwd
) < MAXPATHLEN
)
4979 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
4980 fatal ("`getcwd' failed: %s\n", strerror (errno
));
4982 else if (getwd (buf
) == 0)
4983 fatal ("`getwd' failed: %s\n", buf
);
4987 /* Maybe this should really use some standard subroutine
4988 whose definition is filename syntax dependent. */
4990 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
4992 buf
[rc
] = DIRECTORY_SEP
;
4995 #endif /* not VMS */
4997 current_buffer
->directory
= build_string (buf
);
4999 /* Add /: to the front of the name
5000 if it would otherwise be treated as magic. */
5001 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5003 /* If the default dir is just /, TEMP is non-nil
5004 because of the ange-ftp completion handler.
5005 However, it is not necessary to turn / into /:/.
5006 So avoid doing that. */
5007 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
5008 current_buffer
->directory
5009 = concat2 (build_string ("/:"), current_buffer
->directory
);
5011 temp
= get_minibuffer (0);
5012 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5015 /* initialize the buffer routines */
5019 staticpro (&last_overlay_modification_hooks
);
5020 last_overlay_modification_hooks
5021 = Fmake_vector (make_number (10), Qnil
);
5023 staticpro (&Vbuffer_defaults
);
5024 staticpro (&Vbuffer_local_symbols
);
5025 staticpro (&Qfundamental_mode
);
5026 staticpro (&Qmode_class
);
5027 staticpro (&QSFundamental
);
5028 staticpro (&Vbuffer_alist
);
5029 staticpro (&Qprotected_field
);
5030 staticpro (&Qpermanent_local
);
5031 staticpro (&Qkill_buffer_hook
);
5032 Qoverlayp
= intern ("overlayp");
5033 staticpro (&Qoverlayp
);
5034 Qevaporate
= intern ("evaporate");
5035 staticpro (&Qevaporate
);
5036 Qmodification_hooks
= intern ("modification-hooks");
5037 staticpro (&Qmodification_hooks
);
5038 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5039 staticpro (&Qinsert_in_front_hooks
);
5040 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5041 staticpro (&Qinsert_behind_hooks
);
5042 Qget_file_buffer
= intern ("get-file-buffer");
5043 staticpro (&Qget_file_buffer
);
5044 Qpriority
= intern ("priority");
5045 staticpro (&Qpriority
);
5046 Qwindow
= intern ("window");
5047 staticpro (&Qwindow
);
5048 Qbefore_string
= intern ("before-string");
5049 staticpro (&Qbefore_string
);
5050 Qafter_string
= intern ("after-string");
5051 staticpro (&Qafter_string
);
5052 Qfirst_change_hook
= intern ("first-change-hook");
5053 staticpro (&Qfirst_change_hook
);
5054 Qbefore_change_functions
= intern ("before-change-functions");
5055 staticpro (&Qbefore_change_functions
);
5056 Qafter_change_functions
= intern ("after-change-functions");
5057 staticpro (&Qafter_change_functions
);
5059 Fput (Qprotected_field
, Qerror_conditions
,
5060 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5061 Fput (Qprotected_field
, Qerror_message
,
5062 build_string ("Attempt to modify a protected field"));
5064 /* All these use DEFVAR_LISP_NOPRO because the slots in
5065 buffer_defaults will all be marked via Vbuffer_defaults. */
5067 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5068 &buffer_defaults
.mode_line_format
,
5069 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5070 This is the same as (default-value 'mode-line-format). */);
5072 DEFVAR_LISP_NOPRO ("default-header-line-format",
5073 &buffer_defaults
.header_line_format
,
5074 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5075 This is the same as (default-value 'header-line-format). */);
5077 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5078 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5079 This is the same as (default-value 'cursor-type). */);
5081 DEFVAR_LISP_NOPRO ("default-line-spacing",
5082 &buffer_defaults
.extra_line_spacing
,
5083 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5084 This is the same as (default-value 'line-spacing). */);
5086 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5087 &buffer_defaults
.abbrev_mode
,
5088 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5089 This is the same as (default-value 'abbrev-mode). */);
5091 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5092 &buffer_defaults
.ctl_arrow
,
5093 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5094 This is the same as (default-value 'ctl-arrow). */);
5096 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5097 &buffer_defaults
.direction_reversed
,
5098 doc
: /* Default value of `direction_reversed' for buffers that do not override it.
5099 This is the same as (default-value 'direction-reversed). */);
5101 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5102 &buffer_defaults
.enable_multibyte_characters
,
5103 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5104 This is the same as (default-value 'enable-multibyte-characters). */);
5106 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5107 &buffer_defaults
.buffer_file_coding_system
,
5108 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5109 This is the same as (default-value 'buffer-file-coding-system). */);
5111 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5112 &buffer_defaults
.truncate_lines
,
5113 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5114 This is the same as (default-value 'truncate-lines). */);
5116 DEFVAR_LISP_NOPRO ("default-fill-column",
5117 &buffer_defaults
.fill_column
,
5118 doc
: /* Default value of `fill-column' for buffers that do not override it.
5119 This is the same as (default-value 'fill-column). */);
5121 DEFVAR_LISP_NOPRO ("default-left-margin",
5122 &buffer_defaults
.left_margin
,
5123 doc
: /* Default value of `left-margin' for buffers that do not override it.
5124 This is the same as (default-value 'left-margin). */);
5126 DEFVAR_LISP_NOPRO ("default-tab-width",
5127 &buffer_defaults
.tab_width
,
5128 doc
: /* Default value of `tab-width' for buffers that do not override it.
5129 This is the same as (default-value 'tab-width). */);
5131 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5132 &buffer_defaults
.case_fold_search
,
5133 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5134 This is the same as (default-value 'case-fold-search). */);
5137 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5138 &buffer_defaults
.buffer_file_type
,
5139 doc
: /* Default file type for buffers that do not override it.
5140 This is the same as (default-value 'buffer-file-type).
5141 The file type is nil for text, t for binary. */);
5144 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5145 &buffer_defaults
.left_margin_width
,
5146 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5147 This is the same as (default-value 'left-margin-width). */);
5149 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5150 &buffer_defaults
.right_margin_width
,
5151 doc
: /* Default value of `right_margin_width' for buffers that don't override it.
5152 This is the same as (default-value 'right-margin-width). */);
5154 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5155 &buffer_defaults
.indicate_empty_lines
,
5156 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5157 This is the same as (default-value 'indicate-empty-lines). */);
5159 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5160 &buffer_defaults
.scroll_up_aggressively
,
5161 doc
: /* Default value of `scroll-up-aggressively' for buffers that
5162 don't override it. This is the same as (default-value
5163 'scroll-up-aggressively). */);
5165 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5166 &buffer_defaults
.scroll_down_aggressively
,
5167 doc
: /* Default value of `scroll-down-aggressively' for buffers that
5168 don't override it. This is the same as (default-value
5169 'scroll-down-aggressively). */);
5171 DEFVAR_PER_BUFFER ("header-line-format",
5172 ¤t_buffer
->header_line_format
,
5174 doc
: /* Analogous to `mode-line-format', but for the mode line that can be
5175 displayed at the top of a window. */);
5177 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5179 doc
: /* Template for displaying mode line for current buffer.
5180 Each buffer has its own value of this variable.
5181 Value may be nil, a string, a symbol or a list or cons cell.
5182 A value of nil means don't display a mode line.
5183 For a symbol, its value is used (but it is ignored if t or nil).
5184 A string appearing directly as the value of a symbol is processed verbatim
5185 in that the %-constructs below are not recognized.
5186 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5187 is used as a mode line element.
5188 For a list whose car is a symbol, the symbol's value is taken,
5189 and if that is non-nil, the cadr of the list is processed recursively.
5190 Otherwise, the caddr of the list (if there is one) is processed.
5191 For a list whose car is a string or list, each element is processed
5192 recursively and the results are effectively concatenated.
5193 For a list whose car is an integer, the cdr of the list is processed
5194 and padded (if the number is positive) or truncated (if negative)
5195 to the width specified by that number.
5196 A string is printed verbatim in the mode line except for %-constructs:
5197 (%-constructs are allowed when the string is the entire mode-line-format
5198 or when it is found in a cons-cell or a list)
5199 %b -- print buffer name. %f -- print visited file name.
5200 %F -- print frame name.
5201 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5202 %& is like %*, but ignore read-only-ness.
5203 % means buffer is read-only and * means it is modified.
5204 For a modified read-only buffer, %* gives % and %+ gives *.
5205 %s -- print process status. %l -- print the current line number.
5206 %c -- print the current column number (this makes editing slower).
5207 To make the column number update correctly in all cases,
5208 `column-number-mode' must be non-nil.
5209 %p -- print percent of buffer above top of window, or Top, Bot or All.
5210 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5211 or print Bottom or All.
5212 %m -- print the mode name.
5213 %n -- print Narrow if appropriate.
5214 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5215 %Z -- like %z, but including the end-of-line format.
5216 %[ -- print one [ for each recursive editing level. %] similar.
5217 %% -- print %. %- -- print infinitely many dashes.
5218 Decimal digits after the % specify field width to which to pad. */);
5220 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5221 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5222 nil here means use current buffer's major mode. */);
5224 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5225 make_number (Lisp_Symbol
),
5226 doc
: /* Symbol for current buffer's major mode. */);
5228 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5229 make_number (Lisp_String
),
5230 doc
: /* Pretty name of current buffer's major mode (a string). */);
5232 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5233 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5235 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5237 doc
: /* *Non-nil if searches and matches should ignore case. */);
5239 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5240 make_number (Lisp_Int
),
5241 doc
: /* *Column beyond which automatic line-wrapping should happen. */);
5243 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5244 make_number (Lisp_Int
),
5245 doc
: /* *Column for the default indent-line-function to indent to.
5246 Linefeed indents to this column in Fundamental mode. */);
5248 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5249 make_number (Lisp_Int
),
5250 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5252 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5253 doc
: /* *Non-nil means display control chars with uparrow.
5254 A value of nil means use backslash and octal digits.
5255 This variable does not apply to characters whose display is specified
5256 in the current display table (if there is one). */);
5258 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5259 ¤t_buffer
->enable_multibyte_characters
,
5261 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5262 Otherwise they are regarded as unibyte. This affects the display,
5263 file I/O and the behavior of various editing commands.
5265 This variable is buffer-local but you cannot set it directly;
5266 use the function `set-buffer-multibyte' to change a buffer's representation.
5267 Changing its default value with `setq-default' is supported.
5268 See also variable `default-enable-multibyte-characters' and Info node
5269 `(elisp)Text Representations'. */);
5271 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5272 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5273 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5274 This variable applies to saving the buffer, and also to `write-region'
5275 and other functions that use `write-region'.
5276 It does not apply to sending output to subprocesses, however.
5278 If this is nil, the buffer is saved without any code conversion
5279 unless some coding system is specified in `file-coding-system-alist'
5280 for the buffer file.
5282 The variable `coding-system-for-write', if non-nil, overrides this variable.
5284 This variable is never applied to a way of decoding a file while reading it. */);
5286 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5288 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5290 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5291 doc
: /* *Non-nil means do not display continuation lines;
5292 give each line of text one screen line.
5294 Note that this is overridden by the variable
5295 `truncate-partial-width-windows' if that variable is non-nil
5296 and this buffer is not full-frame width. */);
5299 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5301 doc
: /* Non-nil if the visited file is a binary file.
5302 This variable is meaningful on MS-DOG and Windows NT.
5303 On those systems, it is automatically local in every buffer.
5304 On other systems, this variable is normally always nil. */);
5307 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5308 make_number (Lisp_String
),
5309 doc
: /* Name of default directory of current buffer. Should end with slash.
5310 To interactively change the default directory, use command `cd'. */);
5312 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5314 doc
: /* Function called (if non-nil) to perform auto-fill.
5315 It is called after self-inserting any character specified in
5316 the `auto-fill-chars' table.
5317 NOTE: This variable is not a hook;
5318 its value may not be a list of functions. */);
5320 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5321 make_number (Lisp_String
),
5322 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5324 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5325 make_number (Lisp_String
),
5326 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5327 The truename of a file is calculated by `file-truename'
5328 and then abbreviated with `abbreviate-file-name'. */);
5330 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5331 ¤t_buffer
->auto_save_file_name
,
5332 make_number (Lisp_String
),
5333 doc
: /* Name of file for auto-saving current buffer,
5334 or nil if buffer should not be auto-saved. */);
5336 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5337 doc
: /* Non-nil if this buffer is read-only. */);
5339 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5340 doc
: /* Non-nil if this buffer's file has been backed up.
5341 Backing up is done before the first time the file is saved. */);
5343 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5344 make_number (Lisp_Int
),
5345 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5348 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5350 doc
: /* Non-nil enables selective display:
5351 Integer N as value means display only lines
5352 that start with less than n columns of space.
5353 A value of t means, after a ^M, all the rest of the line is invisible.
5354 Then ^M's in the file are written into files as newlines. */);
5357 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5358 ¤t_buffer
->selective_display_ellipses
,
5360 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5363 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5364 doc
: /* Non-nil if self-insertion should replace existing text.
5365 The value should be one of `overwrite-mode-textual',
5366 `overwrite-mode-binary', or nil.
5367 If it is `overwrite-mode-textual', self-insertion still
5368 inserts at the end of a line, and inserts when point is before a tab,
5369 until the tab is filled in.
5370 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5372 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5374 doc
: /* Display table that controls display of the contents of current buffer.
5376 If this variable is nil, the value of `standard-display-table' is used.
5377 Each window can have its own, overriding display table, see
5378 `set-window-display-table' and `window-display-table'.
5380 The display table is a char-table created with `make-display-table'.
5381 A char-table is an array indexed by character codes. Normal array
5382 primitives `aref' and `aset' can be used to access elements of a char-table.
5384 Each of the char-table elements control how to display the corresponding
5385 text character: the element at index C in the table says how to display
5386 the character whose code is C. Each element should be a vector of
5387 characters or nil. nil means display the character in the default fashion;
5388 otherwise, the characters from the vector are delivered to the screen
5389 instead of the original character.
5391 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5392 a capital Y instead of each X character.
5394 In addition, a char-table has six extra slots to control the display of:
5396 the end of a truncated screen line (extra-slot 0, a single character);
5397 the end of a continued line (extra-slot 1, a single character);
5398 the escape character used to display character codes in octal
5399 (extra-slot 2, a single character);
5400 the character used as an arrow for control characters (extra-slot 3,
5401 a single character);
5402 the decoration indicating the presence of invisible lines (extra-slot 4,
5403 a vector of characters);
5404 the character used to draw the border between side-by-side windows
5405 (extra-slot 5, a single character).
5407 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5409 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_width
,
5411 doc
: /* *Width of left marginal area for display of a buffer.
5412 A value of nil means no marginal area. */);
5414 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_width
,
5416 doc
: /* *Width of right marginal area for display of a buffer.
5417 A value of nil means no marginal area. */);
5419 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5420 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5421 doc
: /* *Visually indicate empty lines after the buffer end.
5422 If non-nil, a bitmap is displayed in the left fringe of a window on
5423 window-systems. */);
5425 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5426 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5427 doc
: /* *If a number, scroll display up aggressively.
5428 If scrolling a window because point is above the window start, choose
5429 a new window start so that point ends up that fraction of the window's
5430 height from the top of the window. */);
5432 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5433 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5434 doc
: /* *If a number, scroll display down aggressively.
5435 If scrolling a window because point is below the window end, choose
5436 a new window start so that point ends up that fraction of the window's
5437 height from the bottom of the window. */);
5439 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5443 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5444 doc
: /* List of functions to call before each text change.
5445 Two arguments are passed to each function: the positions of
5446 the beginning and end of the range of old text to be changed.
5447 \(For an insertion, the beginning and end are at the same place.)
5448 No information is given about the length of the text after the change.
5450 Buffer changes made while executing the `before-change-functions'
5451 don't call any before-change or after-change functions.
5452 That's because these variables are temporarily set to nil.
5453 As a result, a hook function cannot straightforwardly alter the value of
5454 these variables. See the Emacs Lisp manual for a way of
5455 accomplishing an equivalent result by using other variables.
5457 If an unhandled error happens in running these functions,
5458 the variable's value remains nil. That prevents the error
5459 from happening repeatedly and making Emacs nonfunctional. */);
5460 Vbefore_change_functions
= Qnil
;
5462 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5463 doc
: /* List of function to call after each text change.
5464 Three arguments are passed to each function: the positions of
5465 the beginning and end of the range of changed text,
5466 and the length in bytes of the pre-change text replaced by that range.
5467 \(For an insertion, the pre-change length is zero;
5468 for a deletion, that length is the number of bytes deleted,
5469 and the post-change beginning and end are at the same place.)
5471 Buffer changes made while executing the `after-change-functions'
5472 don't call any before-change or after-change functions.
5473 That's because these variables are temporarily set to nil.
5474 As a result, a hook function cannot straightforwardly alter the value of
5475 these variables. See the Emacs Lisp manual for a way of
5476 accomplishing an equivalent result by using other variables.
5478 If an unhandled error happens in running these functions,
5479 the variable's value remains nil. That prevents the error
5480 from happening repeatedly and making Emacs nonfunctional. */);
5481 Vafter_change_functions
= Qnil
;
5483 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5484 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5485 The functions are run using the `run-hooks' function. */);
5486 Vfirst_change_hook
= Qnil
;
5488 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5489 doc
: /* List of undo entries in current buffer.
5490 Recent changes come first; older changes follow newer.
5492 An entry (BEG . END) represents an insertion which begins at
5493 position BEG and ends at position END.
5495 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5496 from (abs POSITION). If POSITION is positive, point was at the front
5497 of the text being deleted; if negative, point was at the end.
5499 An entry (t HIGH . LOW) indicates that the buffer previously had
5500 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5501 of the visited file's modification time, as of that time. If the
5502 modification time of the most recent save is different, this entry is
5505 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5506 was modified between BEG and END. PROPERTY is the property name,
5507 and VALUE is the old value.
5509 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5510 was adjusted in position by the offset DISTANCE (an integer).
5512 An entry of the form POSITION indicates that point was at the buffer
5513 location given by the integer. Undoing an entry of this form places
5516 nil marks undo boundaries. The undo command treats the changes
5517 between two undo boundaries as a single step to be undone.
5519 If the value of the variable is t, undo information is not recorded. */);
5521 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5522 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5524 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5525 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5527 Normally, the line-motion functions work by scanning the buffer for
5528 newlines. Columnar operations (like move-to-column and
5529 compute-motion) also work by scanning the buffer, summing character
5530 widths as they go. This works well for ordinary text, but if the
5531 buffer's lines are very long (say, more than 500 characters), these
5532 motion functions will take longer to execute. Emacs may also take
5533 longer to update the display.
5535 If cache-long-line-scans is non-nil, these motion functions cache the
5536 results of their scans, and consult the cache to avoid rescanning
5537 regions of the buffer until the text is modified. The caches are most
5538 beneficial when they prevent the most searching---that is, when the
5539 buffer contains long lines and large regions of characters with the
5540 same, fixed screen width.
5542 When cache-long-line-scans is non-nil, processing short lines will
5543 become slightly slower (because of the overhead of consulting the
5544 cache), and the caches will use memory roughly proportional to the
5545 number of newlines and characters whose screen width varies.
5547 The caches require no explicit maintenance; their accuracy is
5548 maintained internally by the Emacs primitives. Enabling or disabling
5549 the cache should not affect the behavior of any of the motion
5550 functions; it should only affect their performance. */);
5552 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5553 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5555 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5556 doc
: /* List of formats to use when saving this buffer.
5557 Formats are defined by `format-alist'. This variable is
5558 set when a file is visited. Automatically local in all buffers. */);
5560 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5561 ¤t_buffer
->invisibility_spec
, Qnil
,
5562 doc
: /* Invisibility spec of this buffer.
5563 The default is t, which means that text is invisible
5564 if it has a non-nil `invisible' property.
5565 If the value is a list, a text character is invisible if its `invisible'
5566 property is an element in that list.
5567 If an element is a cons cell of the form (PROP . ELLIPSIS),
5568 then characters with property value PROP are invisible,
5569 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5571 DEFVAR_PER_BUFFER ("buffer-display-count",
5572 ¤t_buffer
->display_count
, Qnil
,
5573 doc
: /* A number incremented each time this buffer is displayed in a window.
5574 The function `set-window-buffer' increments it. */);
5576 DEFVAR_PER_BUFFER ("buffer-display-time",
5577 ¤t_buffer
->display_time
, Qnil
,
5578 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5579 The function `set-window-buffer' updates this variable
5580 to the value obtained by calling `current-time'.
5581 If the buffer has never been shown in a window, the value is nil. */);
5583 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5584 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5585 Non-nil also enables highlighting of the region whenever the mark is active.
5586 The variable `highlight-nonselected-windows' controls whether to highlight
5587 all windows or just the selected window. */);
5588 Vtransient_mark_mode
= Qnil
;
5590 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5591 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5592 If the value is t, disregard `buffer-read-only' and all `read-only'
5593 text properties. If the value is a list, disregard `buffer-read-only'
5594 and disregard a `read-only' text property if the property value
5595 is a member of the list. */);
5596 Vinhibit_read_only
= Qnil
;
5598 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5599 doc
: /* Cursor to use in window displaying this buffer.
5600 Values are interpreted as follows:
5602 t use the cursor specified for the frame
5603 nil don't display a cursor
5604 `bar' display a bar cursor with default width
5605 (bar . WIDTH) display a bar cursor with width WIDTH
5606 others display a box cursor. */);
5608 DEFVAR_PER_BUFFER ("line-spacing",
5609 ¤t_buffer
->extra_line_spacing
, Qnil
,
5610 doc
: /* Additional space to put between lines when displaying a buffer.
5611 The space is measured in pixels, and put below lines on window systems. */);
5613 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5614 doc
: /* List of functions called with no args to query before killing a buffer. */);
5615 Vkill_buffer_query_functions
= Qnil
;
5617 defsubr (&Sbuffer_live_p
);
5618 defsubr (&Sbuffer_list
);
5619 defsubr (&Sget_buffer
);
5620 defsubr (&Sget_file_buffer
);
5621 defsubr (&Sget_buffer_create
);
5622 defsubr (&Smake_indirect_buffer
);
5623 defsubr (&Sgenerate_new_buffer_name
);
5624 defsubr (&Sbuffer_name
);
5625 /*defsubr (&Sbuffer_number);*/
5626 defsubr (&Sbuffer_file_name
);
5627 defsubr (&Sbuffer_base_buffer
);
5628 defsubr (&Sbuffer_local_value
);
5629 defsubr (&Sbuffer_local_variables
);
5630 defsubr (&Sbuffer_modified_p
);
5631 defsubr (&Sset_buffer_modified_p
);
5632 defsubr (&Sbuffer_modified_tick
);
5633 defsubr (&Srename_buffer
);
5634 defsubr (&Sother_buffer
);
5635 defsubr (&Sbuffer_disable_undo
);
5636 defsubr (&Sbuffer_enable_undo
);
5637 defsubr (&Skill_buffer
);
5638 defsubr (&Sset_buffer_major_mode
);
5639 defsubr (&Sswitch_to_buffer
);
5640 defsubr (&Spop_to_buffer
);
5641 defsubr (&Scurrent_buffer
);
5642 defsubr (&Sset_buffer
);
5643 defsubr (&Sbarf_if_buffer_read_only
);
5644 defsubr (&Sbury_buffer
);
5645 defsubr (&Serase_buffer
);
5646 defsubr (&Sset_buffer_multibyte
);
5647 defsubr (&Skill_all_local_variables
);
5649 defsubr (&Soverlayp
);
5650 defsubr (&Smake_overlay
);
5651 defsubr (&Sdelete_overlay
);
5652 defsubr (&Smove_overlay
);
5653 defsubr (&Soverlay_start
);
5654 defsubr (&Soverlay_end
);
5655 defsubr (&Soverlay_buffer
);
5656 defsubr (&Soverlay_properties
);
5657 defsubr (&Soverlays_at
);
5658 defsubr (&Soverlays_in
);
5659 defsubr (&Snext_overlay_change
);
5660 defsubr (&Sprevious_overlay_change
);
5661 defsubr (&Soverlay_recenter
);
5662 defsubr (&Soverlay_lists
);
5663 defsubr (&Soverlay_get
);
5664 defsubr (&Soverlay_put
);
5665 defsubr (&Srestore_buffer_modified_p
);
5671 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
5672 initial_define_key (control_x_map
, 'k', "kill-buffer");
5674 /* This must not be in syms_of_buffer, because Qdisabled is not
5675 initialized when that function gets called. */
5676 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);