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
);
223 CHECK_FRAME (frame
, 1);
225 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
227 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
229 while (! NILP (tail
))
231 general
= Fdelq (XCAR (tail
), general
);
234 return nconc2 (framelist
, general
);
240 /* Like Fassoc, but use Fstring_equal to compare
241 (which ignores text properties),
242 and don't ever QUIT. */
245 assoc_ignore_text_properties (key
, list
)
246 register Lisp_Object key
;
249 register Lisp_Object tail
;
250 for (tail
= list
; !NILP (tail
); tail
= Fcdr (tail
))
252 register Lisp_Object elt
, tem
;
254 tem
= Fstring_equal (Fcar (elt
), key
);
261 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
262 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
;
270 CHECK_STRING (name
, 0);
272 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
275 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
276 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
, 0);
287 filename
= Fexpand_file_name (filename
, Qnil
);
289 /* If the file name has special constructs in it,
290 call the corresponding file handler. */
291 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
293 return call2 (handler
, Qget_file_buffer
, filename
);
295 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
297 buf
= Fcdr (XCAR (tail
));
298 if (!BUFFERP (buf
)) continue;
299 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
300 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
308 get_truename_buffer (filename
)
309 register Lisp_Object filename
;
311 register Lisp_Object tail
, buf
, tem
;
313 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
315 buf
= Fcdr (XCAR (tail
));
316 if (!BUFFERP (buf
)) continue;
317 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
318 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
325 /* Incremented for each buffer created, to assign the buffer number. */
328 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
329 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
;
742 CHECK_STRING (name
, 0);
744 tem
= Fget_buffer (name
);
751 sprintf (number
, "<%d>", ++count
);
752 gentemp
= concat2 (name
, build_string (number
));
753 tem
= Fstring_equal (gentemp
, ignore
);
756 tem
= Fget_buffer (gentemp
);
763 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
764 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
, 0);
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
, 0);
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
, 0);
802 base
= XBUFFER (buffer
)->base_buffer
;
807 XSETBUFFER (base_buffer
, base
);
811 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
812 Sbuffer_local_variables
, 0, 1, 0,
813 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
814 Most elements look like (SYMBOL . VALUE), describing one variable.
815 For a symbol that is locally unbound, just the symbol appears in the value.
816 Note that storing new VALUEs in these elements doesn't change the variables.
817 No argument or nil as argument means use current buffer as BUFFER. */)
819 register Lisp_Object buffer
;
821 register struct buffer
*buf
;
822 register Lisp_Object result
;
825 buf
= current_buffer
;
828 CHECK_BUFFER (buffer
, 0);
829 buf
= XBUFFER (buffer
);
835 register Lisp_Object tail
;
836 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
838 Lisp_Object val
, elt
;
842 /* Reference each variable in the alist in buf.
843 If inquiring about the current buffer, this gets the current values,
844 so store them into the alist so the alist is up to date.
845 If inquiring about some other buffer, this swaps out any values
846 for that buffer, making the alist up to date automatically. */
847 val
= find_symbol_value (XCAR (elt
));
848 /* Use the current buffer value only if buf is the current buffer. */
849 if (buf
!= current_buffer
)
852 /* If symbol is unbound, put just the symbol in the list. */
853 if (EQ (val
, Qunbound
))
854 result
= Fcons (XCAR (elt
), result
);
855 /* Otherwise, put (symbol . value) in the list. */
857 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
861 /* Add on all the variables stored in special slots. */
865 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
866 offset
< sizeof (struct buffer
);
867 /* sizeof EMACS_INT == sizeof Lisp_Object */
868 offset
+= (sizeof (EMACS_INT
)))
870 idx
= PER_BUFFER_IDX (offset
);
871 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
872 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
873 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
874 PER_BUFFER_VALUE (buf
, offset
)),
883 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
885 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
886 No argument or nil as argument means use current buffer as BUFFER. */)
888 register Lisp_Object buffer
;
890 register struct buffer
*buf
;
892 buf
= current_buffer
;
895 CHECK_BUFFER (buffer
, 0);
896 buf
= XBUFFER (buffer
);
899 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
902 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
904 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
905 A non-nil FLAG means mark the buffer modified. */)
907 register Lisp_Object flag
;
909 register int already
;
910 register Lisp_Object fn
;
911 Lisp_Object buffer
, window
;
913 #ifdef CLASH_DETECTION
914 /* If buffer becoming modified, lock the file.
915 If buffer becoming unmodified, unlock the file. */
917 fn
= current_buffer
->file_truename
;
918 /* Test buffer-file-name so that binding it to nil is effective. */
919 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
921 already
= SAVE_MODIFF
< MODIFF
;
922 if (!already
&& !NILP (flag
))
924 else if (already
&& NILP (flag
))
927 #endif /* CLASH_DETECTION */
929 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
931 /* Set update_mode_lines only if buffer is displayed in some window.
932 Packages like jit-lock or lazy-lock preserve a buffer's modified
933 state by recording/restoring the state around blocks of code.
934 Setting update_mode_lines makes redisplay consider all windows
935 (on all frames). Stealth fontification of buffers not displayed
936 would incur additional redisplay costs if we'd set
937 update_modes_lines unconditionally.
939 Ideally, I think there should be another mechanism for fontifying
940 buffers without "modifying" buffers, or redisplay should be
941 smarter about updating the `*' in mode lines. --gerd */
942 XSETBUFFER (buffer
, current_buffer
);
943 window
= Fget_buffer_window (buffer
, Qt
);
944 if (WINDOWP (window
))
947 current_buffer
->prevent_redisplay_optimizations_p
= 1;
953 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
954 Srestore_buffer_modified_p
, 1, 1, 0,
955 doc
: /* Like `set-buffer-modified-p', with a differences concerning redisplay.
956 It is not ensured that mode lines will be updated to show the modified
957 state of the current buffer. Use with care. */)
961 #ifdef CLASH_DETECTION
964 /* If buffer becoming modified, lock the file.
965 If buffer becoming unmodified, unlock the file. */
967 fn
= current_buffer
->file_truename
;
968 /* Test buffer-file-name so that binding it to nil is effective. */
969 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
971 int already
= SAVE_MODIFF
< MODIFF
;
972 if (!already
&& !NILP (flag
))
974 else if (already
&& NILP (flag
))
977 #endif /* CLASH_DETECTION */
979 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
983 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
985 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
986 Each buffer has a tick counter which is incremented each time the text in
987 that buffer is changed. It wraps around occasionally.
988 No argument or nil as argument means use current buffer as BUFFER. */)
990 register Lisp_Object buffer
;
992 register struct buffer
*buf
;
994 buf
= current_buffer
;
997 CHECK_BUFFER (buffer
, 0);
998 buf
= XBUFFER (buffer
);
1001 return make_number (BUF_MODIFF (buf
));
1004 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1005 "sRename buffer (to new name): \nP",
1006 doc
: /* Change current buffer's name to NEWNAME (a string).
1007 If second arg UNIQUE is nil or omitted, it is an error if a
1008 buffer named NEWNAME already exists.
1009 If UNIQUE is non-nil, come up with a new name using
1010 `generate-new-buffer-name'.
1011 Interactively, you can set UNIQUE with a prefix argument.
1012 We return the name we actually gave the buffer.
1013 This does not change the name of the visited file (if any). */)
1015 register Lisp_Object newname
, unique
;
1017 register Lisp_Object tem
, buf
;
1019 CHECK_STRING (newname
, 0);
1021 if (XSTRING (newname
)->size
== 0)
1022 error ("Empty string is invalid as a buffer name");
1024 tem
= Fget_buffer (newname
);
1027 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1028 rename the buffer automatically so you can create another
1029 with the original name. It makes UNIQUE equivalent to
1030 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1031 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1032 return current_buffer
->name
;
1034 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1036 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
1039 current_buffer
->name
= newname
;
1041 /* Catch redisplay's attention. Unless we do this, the mode lines for
1042 any windows displaying current_buffer will stay unchanged. */
1043 update_mode_lines
++;
1045 XSETBUFFER (buf
, current_buffer
);
1046 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1047 if (NILP (current_buffer
->filename
)
1048 && !NILP (current_buffer
->auto_save_file_name
))
1049 call0 (intern ("rename-auto-save-file"));
1050 /* Refetch since that last call may have done GC. */
1051 return current_buffer
->name
;
1054 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1055 doc
: /* Return most recently selected buffer other than BUFFER.
1056 Buffers not visible in windows are preferred to visible buffers,
1057 unless optional second argument VISIBLE-OK is non-nil.
1058 If the optional third argument FRAME is non-nil, use that frame's
1059 buffer list instead of the selected frame's buffer list.
1060 If no other buffer exists, the buffer `*scratch*' is returned.
1061 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1062 (buffer
, visible_ok
, frame
)
1063 register Lisp_Object buffer
, visible_ok
, frame
;
1065 Lisp_Object
Fset_buffer_major_mode ();
1066 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1070 frame
= selected_frame
;
1072 tail
= Vbuffer_alist
;
1073 pred
= frame_buffer_predicate (frame
);
1075 /* Consider buffers that have been seen in the selected frame
1076 before other buffers. */
1078 tem
= frame_buffer_list (frame
);
1082 if (BUFFERP (XCAR (tem
)))
1083 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1086 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1088 for (; !NILP (tail
); tail
= Fcdr (tail
))
1090 buf
= Fcdr (Fcar (tail
));
1091 if (EQ (buf
, buffer
))
1093 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
1095 /* If the selected frame has a buffer_predicate,
1096 disregard buffers that don't fit the predicate. */
1099 tem
= call1 (pred
, buf
);
1104 if (NILP (visible_ok
))
1105 tem
= Fget_buffer_window (buf
, Qvisible
);
1110 if (NILP (notsogood
))
1113 if (!NILP (notsogood
))
1115 buf
= Fget_buffer (build_string ("*scratch*"));
1118 buf
= Fget_buffer_create (build_string ("*scratch*"));
1119 Fset_buffer_major_mode (buf
);
1124 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
1126 doc
: /* Make BUFFER stop keeping undo information.
1127 No argument or nil as argument means do this for the current buffer. */)
1129 register Lisp_Object buffer
;
1131 Lisp_Object real_buffer
;
1134 XSETBUFFER (real_buffer
, current_buffer
);
1137 real_buffer
= Fget_buffer (buffer
);
1138 if (NILP (real_buffer
))
1142 XBUFFER (real_buffer
)->undo_list
= Qt
;
1147 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1149 doc
: /* Start keeping undo information for buffer BUFFER.
1150 No argument or nil as argument means do this for the current buffer. */)
1152 register Lisp_Object buffer
;
1154 Lisp_Object real_buffer
;
1157 XSETBUFFER (real_buffer
, current_buffer
);
1160 real_buffer
= Fget_buffer (buffer
);
1161 if (NILP (real_buffer
))
1165 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1166 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1172 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1173 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1174 The buffer being killed will be current while the hook is running.\n\
1177 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1178 doc
: /* Kill the buffer BUFFER.
1179 The argument may be a buffer or may be the name of a buffer.
1180 An argument of nil means kill the current buffer.
1182 Value is t if the buffer is actually killed, nil if user says no.
1184 The value of `kill-buffer-hook' (which may be local to that buffer),
1185 if not void, is a list of functions to be called, with no arguments,
1186 before the buffer is actually killed. The buffer to be killed is current
1187 when the hook functions are called.
1189 Any processes that have this buffer as the `process-buffer' are killed
1195 register struct buffer
*b
;
1196 register Lisp_Object tem
;
1197 register struct Lisp_Marker
*m
;
1198 struct gcpro gcpro1
;
1201 buf
= Fcurrent_buffer ();
1203 buf
= Fget_buffer (buffer
);
1209 /* Avoid trouble for buffer already dead. */
1213 /* Query if the buffer is still modified. */
1214 if (INTERACTIVE
&& !NILP (b
->filename
)
1215 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1218 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
1219 XSTRING (b
->name
)->data
));
1225 /* Run hooks with the buffer to be killed the current buffer. */
1227 int count
= specpdl_ptr
- specpdl
;
1230 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1231 set_buffer_internal (b
);
1233 /* First run the query functions; if any query is answered no,
1234 don't kill the buffer. */
1235 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
1237 tem
= call0 (Fcar (list
));
1239 return unbind_to (count
, Qnil
);
1242 /* Then run the hooks. */
1243 if (!NILP (Vrun_hooks
))
1244 call1 (Vrun_hooks
, Qkill_buffer_hook
);
1245 unbind_to (count
, Qnil
);
1248 /* We have no more questions to ask. Verify that it is valid
1249 to kill the buffer. This must be done after the questions
1250 since anything can happen within do_yes_or_no_p. */
1252 /* Don't kill the minibuffer now current. */
1253 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1259 /* When we kill a base buffer, kill all its indirect buffers.
1260 We do it at this stage so nothing terrible happens if they
1261 ask questions or their hooks get errors. */
1262 if (! b
->base_buffer
)
1264 struct buffer
*other
;
1268 for (other
= all_buffers
; other
; other
= other
->next
)
1269 /* all_buffers contains dead buffers too;
1270 don't re-kill them. */
1271 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1274 XSETBUFFER (buf
, other
);
1281 /* Make this buffer not be current.
1282 In the process, notice if this is the sole visible buffer
1283 and give up if so. */
1284 if (b
== current_buffer
)
1286 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1288 if (b
== current_buffer
)
1292 /* Notice if the buffer to kill is the sole visible buffer
1293 when we're currently in the mini-buffer, and give up if so. */
1294 XSETBUFFER (tem
, current_buffer
);
1295 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1297 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1302 /* Now there is no question: we can kill the buffer. */
1304 #ifdef CLASH_DETECTION
1305 /* Unlock this buffer's file, if it is locked. */
1307 #endif /* CLASH_DETECTION */
1309 kill_buffer_processes (buf
);
1311 tem
= Vinhibit_quit
;
1313 replace_buffer_in_all_windows (buf
);
1314 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1315 frames_discard_buffer (buf
);
1316 Vinhibit_quit
= tem
;
1318 /* Delete any auto-save file, if we saved it in this session. */
1319 if (STRINGP (b
->auto_save_file_name
)
1320 && b
->auto_save_modified
!= 0
1321 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
)
1324 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1326 internal_delete_file (b
->auto_save_file_name
);
1331 /* Unchain all markers that belong to this indirect buffer.
1332 Don't unchain the markers that belong to the base buffer
1333 or its other indirect buffers. */
1334 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1340 unchain_marker (tem
);
1346 /* Unchain all markers of this buffer and its indirect buffers.
1347 and leave them pointing nowhere. */
1348 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1355 BUF_MARKERS (b
) = Qnil
;
1356 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1358 /* Perhaps we should explicitly free the interval tree here... */
1361 /* Reset the local variables, so that this buffer's local values
1362 won't be protected from GC. They would be protected
1363 if they happened to remain encached in their symbols.
1364 This gets rid of them for certain. */
1365 swap_out_buffer_local_variables (b
);
1366 reset_buffer_local_variables (b
, 1);
1371 if (! b
->base_buffer
)
1372 free_buffer_text (b
);
1374 if (b
->newline_cache
)
1376 free_region_cache (b
->newline_cache
);
1377 b
->newline_cache
= 0;
1379 if (b
->width_run_cache
)
1381 free_region_cache (b
->width_run_cache
);
1382 b
->width_run_cache
= 0;
1384 b
->width_table
= Qnil
;
1386 b
->undo_list
= Qnil
;
1391 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1392 we do this each time BUF is selected visibly, the more recently
1393 selected buffers are always closer to the front of the list. This
1394 means that other_buffer is more likely to choose a relevant buffer. */
1400 register Lisp_Object link
, prev
;
1402 frame
= selected_frame
;
1405 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1407 if (EQ (XCDR (XCAR (link
)), buf
))
1412 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1413 we cannot use Fdelq itself here because it allows quitting. */
1416 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1418 XSETCDR (prev
, XCDR (XCDR (prev
)));
1420 XSETCDR (link
, Vbuffer_alist
);
1421 Vbuffer_alist
= link
;
1423 /* Now move this buffer to the front of frame_buffer_list also. */
1426 for (link
= frame_buffer_list (frame
); CONSP (link
);
1429 if (EQ (XCAR (link
), buf
))
1434 /* Effectively do delq. */
1439 set_frame_buffer_list (frame
,
1440 XCDR (frame_buffer_list (frame
)));
1442 XSETCDR (prev
, XCDR (XCDR (prev
)));
1444 XSETCDR (link
, frame_buffer_list (frame
));
1445 set_frame_buffer_list (frame
, link
);
1448 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1451 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1452 doc
: /* Set an appropriate major mode for BUFFER.
1453 For the *scratch* buffer, use `initial-major-mode', otherwise chose a mode
1454 according to `default-major-mode'.
1455 Use this function before selecting the buffer, since it may need to inspect
1456 the current buffer's major mode. */)
1461 Lisp_Object function
;
1463 if (STRINGP (XBUFFER (buffer
)->name
)
1464 && strcmp (XSTRING (XBUFFER (buffer
)->name
)->data
, "*scratch*") == 0)
1465 function
= find_symbol_value (intern ("initial-major-mode"));
1468 function
= buffer_defaults
.major_mode
;
1470 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1471 function
= current_buffer
->major_mode
;
1474 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1477 count
= specpdl_ptr
- specpdl
;
1479 /* To select a nonfundamental mode,
1480 select the buffer temporarily and then call the mode function. */
1482 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1484 Fset_buffer (buffer
);
1487 return unbind_to (count
, Qnil
);
1490 /* If switching buffers in WINDOW would be an error, return
1491 a C string saying what the error would be. */
1494 no_switch_window (window
)
1498 if (EQ (minibuf_window
, window
))
1499 return "Cannot switch buffers in minibuffer window";
1500 tem
= Fwindow_dedicated_p (window
);
1502 return "Cannot switch buffers in a dedicated window";
1506 /* Switch to buffer BUFFER in the selected window.
1507 If NORECORD is non-nil, don't call record_buffer. */
1510 switch_to_buffer_1 (buffer
, norecord
)
1511 Lisp_Object buffer
, norecord
;
1513 register Lisp_Object buf
;
1516 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1519 buf
= Fget_buffer (buffer
);
1522 buf
= Fget_buffer_create (buffer
);
1523 Fset_buffer_major_mode (buf
);
1527 if (NILP (norecord
))
1528 record_buffer (buf
);
1530 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1531 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1538 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1539 doc
: /* Select buffer BUFFER in the current window.
1540 BUFFER may be a buffer or a buffer name.
1541 Optional second arg NORECORD non-nil means
1542 do not put this buffer at the front of the list of recently selected ones.
1544 WARNING: This is NOT the way to work on another buffer temporarily
1545 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1546 the window-buffer correspondences. */)
1548 Lisp_Object buffer
, norecord
;
1552 err
= no_switch_window (selected_window
);
1553 if (err
) error (err
);
1555 return switch_to_buffer_1 (buffer
, norecord
);
1558 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1559 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1560 If BUFFER is nil, then some other buffer is chosen.
1561 If `pop-up-windows' is non-nil, windows can be split to do this.
1562 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1563 window even if BUFFER is already visible in the selected window.
1564 This uses the function `display-buffer' as a subroutine; see the documentation
1565 of `display-buffer' for additional customization information.
1567 Optional third arg NORECORD non-nil means
1568 do not put this buffer at the front of the list of recently selected ones. */)
1569 (buffer
, other_window
, norecord
)
1570 Lisp_Object buffer
, other_window
, norecord
;
1572 register Lisp_Object buf
;
1574 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1577 buf
= Fget_buffer (buffer
);
1580 buf
= Fget_buffer_create (buffer
);
1581 Fset_buffer_major_mode (buf
);
1585 if (NILP (norecord
))
1586 /* This seems bogus since Fselect_window will call record_buffer anyway. */
1587 record_buffer (buf
);
1588 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1592 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1593 doc
: /* Return the current buffer as a Lisp object. */)
1596 register Lisp_Object buf
;
1597 XSETBUFFER (buf
, current_buffer
);
1601 /* Set the current buffer to B.
1603 We previously set windows_or_buffers_changed here to invalidate
1604 global unchanged information in beg_unchanged and end_unchanged.
1605 This is no longer necessary because we now compute unchanged
1606 information on a buffer-basis. Every action affecting other
1607 windows than the selected one requires a select_window at some
1608 time, and that increments windows_or_buffers_changed. */
1611 set_buffer_internal (b
)
1612 register struct buffer
*b
;
1614 if (current_buffer
!= b
)
1615 set_buffer_internal_1 (b
);
1618 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1619 This is used by redisplay. */
1622 set_buffer_internal_1 (b
)
1623 register struct buffer
*b
;
1625 register struct buffer
*old_buf
;
1626 register Lisp_Object tail
, valcontents
;
1629 #ifdef USE_MMAP_FOR_BUFFERS
1630 if (b
->text
->beg
== NULL
)
1631 enlarge_buffer_text (b
, 0);
1632 #endif /* USE_MMAP_FOR_BUFFERS */
1634 if (current_buffer
== b
)
1637 old_buf
= current_buffer
;
1639 last_known_column_point
= -1; /* invalidate indentation cache */
1643 /* Put the undo list back in the base buffer, so that it appears
1644 that an indirect buffer shares the undo list of its base. */
1645 if (old_buf
->base_buffer
)
1646 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1648 /* If the old current buffer has markers to record PT, BEGV and ZV
1649 when it is not current, update them now. */
1650 if (! NILP (old_buf
->pt_marker
))
1653 XSETBUFFER (obuf
, old_buf
);
1654 set_marker_both (old_buf
->pt_marker
, obuf
,
1655 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1657 if (! NILP (old_buf
->begv_marker
))
1660 XSETBUFFER (obuf
, old_buf
);
1661 set_marker_both (old_buf
->begv_marker
, obuf
,
1662 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1664 if (! NILP (old_buf
->zv_marker
))
1667 XSETBUFFER (obuf
, old_buf
);
1668 set_marker_both (old_buf
->zv_marker
, obuf
,
1669 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1673 /* Get the undo list from the base buffer, so that it appears
1674 that an indirect buffer shares the undo list of its base. */
1676 b
->undo_list
= b
->base_buffer
->undo_list
;
1678 /* If the new current buffer has markers to record PT, BEGV and ZV
1679 when it is not current, fetch them now. */
1680 if (! NILP (b
->pt_marker
))
1682 BUF_PT (b
) = marker_position (b
->pt_marker
);
1683 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1685 if (! NILP (b
->begv_marker
))
1687 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1688 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1690 if (! NILP (b
->zv_marker
))
1692 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1693 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1696 /* Look down buffer's list of local Lisp variables
1697 to find and update any that forward into C variables. */
1699 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1701 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1702 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1703 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1704 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1705 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1706 /* Just reference the variable
1707 to cause it to become set for this buffer. */
1708 Fsymbol_value (XCAR (XCAR (tail
)));
1711 /* Do the same with any others that were local to the previous buffer */
1714 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1716 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1717 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1718 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1719 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1720 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1721 /* Just reference the variable
1722 to cause it to become set for this buffer. */
1723 Fsymbol_value (XCAR (XCAR (tail
)));
1727 /* Switch to buffer B temporarily for redisplay purposes.
1728 This avoids certain things that don't need to be done within redisplay. */
1734 register struct buffer
*old_buf
;
1736 if (current_buffer
== b
)
1739 old_buf
= current_buffer
;
1744 /* If the old current buffer has markers to record PT, BEGV and ZV
1745 when it is not current, update them now. */
1746 if (! NILP (old_buf
->pt_marker
))
1749 XSETBUFFER (obuf
, old_buf
);
1750 set_marker_both (old_buf
->pt_marker
, obuf
,
1751 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1753 if (! NILP (old_buf
->begv_marker
))
1756 XSETBUFFER (obuf
, old_buf
);
1757 set_marker_both (old_buf
->begv_marker
, obuf
,
1758 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1760 if (! NILP (old_buf
->zv_marker
))
1763 XSETBUFFER (obuf
, old_buf
);
1764 set_marker_both (old_buf
->zv_marker
, obuf
,
1765 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1769 /* If the new current buffer has markers to record PT, BEGV and ZV
1770 when it is not current, fetch them now. */
1771 if (! NILP (b
->pt_marker
))
1773 BUF_PT (b
) = marker_position (b
->pt_marker
);
1774 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1776 if (! NILP (b
->begv_marker
))
1778 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1779 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1781 if (! NILP (b
->zv_marker
))
1783 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1784 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1788 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1789 doc
: /* Make the buffer BUFFER current for editing operations.
1790 BUFFER may be a buffer or the name of an existing buffer.
1791 See also `save-excursion' when you want to make a buffer current temporarily.
1792 This function does not display the buffer, so its effect ends
1793 when the current command terminates.
1794 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1796 register Lisp_Object buffer
;
1798 register Lisp_Object buf
;
1799 buf
= Fget_buffer (buffer
);
1802 if (NILP (XBUFFER (buf
)->name
))
1803 error ("Selecting deleted buffer");
1804 set_buffer_internal (XBUFFER (buf
));
1808 /* Set the current buffer to BUFFER provided it is alive. */
1811 set_buffer_if_live (buffer
)
1814 if (! NILP (XBUFFER (buffer
)->name
))
1815 Fset_buffer (buffer
);
1819 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1820 Sbarf_if_buffer_read_only
, 0, 0, 0,
1821 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1824 if (!NILP (current_buffer
->read_only
)
1825 && NILP (Vinhibit_read_only
))
1826 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1830 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1831 doc
: /* Put BUFFER at the end of the list of all buffers.
1832 There it is the least likely candidate for `other-buffer' to return;
1833 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1834 If BUFFER is nil or omitted, bury the current buffer.
1835 Also, if BUFFER is nil or omitted, remove the current buffer from the
1836 selected window if it is displayed there. */)
1838 register Lisp_Object buffer
;
1840 /* Figure out what buffer we're going to bury. */
1844 XSETBUFFER (buffer
, current_buffer
);
1846 tem
= Fwindow_buffer (selected_window
);
1847 /* If we're burying the current buffer, unshow it. */
1848 if (EQ (buffer
, tem
))
1849 if (NILP (Fwindow_dedicated_p (selected_window
)))
1850 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1851 else if (NILP (XWINDOW (selected_window
)->parent
))
1852 Ficonify_frame (Fwindow_frame (selected_window
));
1854 Fdelete_window (selected_window
);
1860 buf1
= Fget_buffer (buffer
);
1866 /* Move buffer to the end of the buffer list. Do nothing if the
1867 buffer is killed. */
1868 if (!NILP (XBUFFER (buffer
)->name
))
1870 Lisp_Object aelt
, link
;
1872 aelt
= Frassq (buffer
, Vbuffer_alist
);
1873 link
= Fmemq (aelt
, Vbuffer_alist
);
1874 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1875 XSETCDR (link
, Qnil
);
1876 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1878 frames_bury_buffer (buffer
);
1884 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1885 doc
: /* Delete the entire contents of the current buffer.
1886 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1887 so the buffer is truly empty after this. */)
1894 current_buffer
->last_window_start
= 1;
1895 /* Prevent warnings, or suspension of auto saving, that would happen
1896 if future size is less than past size. Use of erase-buffer
1897 implies that the future text is not really related to the past text. */
1898 XSETFASTINT (current_buffer
->save_length
, 0);
1903 validate_region (b
, e
)
1904 register Lisp_Object
*b
, *e
;
1906 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1907 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1909 if (XINT (*b
) > XINT (*e
))
1912 tem
= *b
; *b
= *e
; *e
= tem
;
1915 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1916 && XINT (*e
) <= ZV
))
1917 args_out_of_range (*b
, *e
);
1920 /* Advance BYTE_POS up to a character boundary
1921 and return the adjusted position. */
1924 advance_to_char_boundary (byte_pos
)
1929 if (byte_pos
== BEG
)
1930 /* Beginning of buffer is always a character boundary. */
1933 c
= FETCH_BYTE (byte_pos
);
1934 if (! CHAR_HEAD_P (c
))
1936 /* We should advance BYTE_POS only when C is a constituent of a
1937 multibyte sequence. */
1938 int orig_byte_pos
= byte_pos
;
1943 c
= FETCH_BYTE (byte_pos
);
1945 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
1947 if (byte_pos
< orig_byte_pos
)
1948 byte_pos
= orig_byte_pos
;
1949 /* If C is a constituent of a multibyte sequence, BYTE_POS was
1950 surely advance to the correct character boundary. If C is
1951 not, BYTE_POS was unchanged. */
1957 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
1959 doc
: /* Set the multibyte flag of the current buffer to FLAG.
1960 If FLAG is t, this makes the buffer a multibyte buffer.
1961 If FLAG is nil, this makes the buffer a single-byte buffer.
1962 The buffer contents remain unchanged as a sequence of bytes
1963 but the contents viewed as characters do change. */)
1967 Lisp_Object tail
, markers
;
1968 struct buffer
*other
;
1969 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
1970 int begv
= BEGV
, zv
= ZV
;
1971 int narrowed
= (BEG
!= begv
|| Z
!= zv
);
1972 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
1974 if (current_buffer
->base_buffer
)
1975 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
1977 /* Do nothing if nothing actually changes. */
1978 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
1981 /* It would be better to update the list,
1982 but this is good enough for now. */
1984 current_buffer
->undo_list
= Qt
;
1986 /* If the cached position is for this buffer, clear it out. */
1987 clear_charpos_cache (current_buffer
);
1997 /* Do this first, so it can use CHAR_TO_BYTE
1998 to calculate the old correspondences. */
1999 set_intervals_multibyte (0);
2001 current_buffer
->enable_multibyte_characters
= Qnil
;
2007 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2009 tail
= BUF_MARKERS (current_buffer
);
2010 while (! NILP (tail
))
2012 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
2013 tail
= XMARKER (tail
)->chain
;
2016 /* Convert multibyte form of 8-bit characters to unibyte. */
2031 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2032 p
+= bytes
, pos
+= bytes
;
2035 c
= STRING_CHAR (p
, stop
- pos
);
2036 /* Delete all bytes for this 8-bit character but the
2037 last one, and change the last one to the charcter
2040 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2052 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2060 /* Be sure not to have a multibyte sequence striding over the GAP.
2061 Ex: We change this: "...abc\201 _GAP_ \241def..."
2062 to: "...abc _GAP_ \201\241def..." */
2064 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2065 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2067 unsigned char *p
= GPT_ADDR
- 1;
2069 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2070 if (BASE_LEADING_CODE_P (*p
))
2072 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2074 move_gap_both (new_gpt
, new_gpt
);
2078 /* Make the buffer contents valid as multibyte by converting
2079 8-bit characters to multibyte form. */
2095 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2096 p
+= bytes
, pos
+= bytes
;
2099 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2101 bytes
= CHAR_STRING (*p
, tmp
);
2103 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2105 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2106 /* Now the gap is after the just inserted data. */
2123 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2125 /* Do this first, so that chars_in_text asks the right question.
2126 set_intervals_multibyte needs it too. */
2127 current_buffer
->enable_multibyte_characters
= Qt
;
2129 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2130 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2132 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2134 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2135 if (BEGV_BYTE
> GPT_BYTE
)
2136 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2138 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2140 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2141 if (ZV_BYTE
> GPT_BYTE
)
2142 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2144 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2147 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2150 if (pt_byte
> GPT_BYTE
)
2151 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2153 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2154 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2157 tail
= markers
= BUF_MARKERS (current_buffer
);
2159 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2160 getting confused by the markers that have not yet been updated.
2161 It is also a signal that it should never create a marker. */
2162 BUF_MARKERS (current_buffer
) = Qnil
;
2164 while (! NILP (tail
))
2166 XMARKER (tail
)->bytepos
2167 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
2168 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
2170 tail
= XMARKER (tail
)->chain
;
2173 /* Make sure no markers were put on the chain
2174 while the chain value was incorrect. */
2175 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
2178 BUF_MARKERS (current_buffer
) = markers
;
2180 /* Do this last, so it can calculate the new correspondences
2181 between chars and bytes. */
2182 set_intervals_multibyte (1);
2186 current_buffer
->undo_list
= Qnil
;
2188 /* Changing the multibyteness of a buffer means that all windows
2189 showing that buffer must be updated thoroughly. */
2190 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2191 ++windows_or_buffers_changed
;
2193 /* Copy this buffer's new multibyte status
2194 into all of its indirect buffers. */
2195 for (other
= all_buffers
; other
; other
= other
->next
)
2196 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2198 other
->enable_multibyte_characters
2199 = current_buffer
->enable_multibyte_characters
;
2200 other
->prevent_redisplay_optimizations_p
= 1;
2203 /* Restore the modifiedness of the buffer. */
2204 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2205 Fset_buffer_modified_p (Qnil
);
2210 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2212 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2213 Most local variable bindings are eliminated so that the default values
2214 become effective once more. Also, the syntax table is set from
2215 `standard-syntax-table', the local keymap is set to nil,
2216 and the abbrev table from `fundamental-mode-abbrev-table'.
2217 This function also forces redisplay of the mode line.
2219 Every function to select a new major mode starts by
2220 calling this function.
2222 As a special exception, local variables whose names have
2223 a non-nil `permanent-local' property are not eliminated by this function.
2225 The first thing this function does is run
2226 the normal hook `change-major-mode-hook'. */)
2229 register Lisp_Object alist
, sym
, tem
;
2232 if (!NILP (Vrun_hooks
))
2233 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2234 oalist
= current_buffer
->local_var_alist
;
2236 /* Make sure none of the bindings in oalist
2237 remain swapped in, in their symbols. */
2239 swap_out_buffer_local_variables (current_buffer
);
2241 /* Actually eliminate all local bindings of this buffer. */
2243 reset_buffer_local_variables (current_buffer
, 0);
2245 /* Redisplay mode lines; we are changing major mode. */
2247 update_mode_lines
++;
2249 /* Any which are supposed to be permanent,
2250 make local again, with the same values they had. */
2252 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2254 sym
= XCAR (XCAR (alist
));
2255 tem
= Fget (sym
, Qpermanent_local
);
2258 Fmake_local_variable (sym
);
2259 Fset (sym
, XCDR (XCAR (alist
)));
2263 /* Force mode-line redisplay. Useful here because all major mode
2264 commands call this function. */
2265 update_mode_lines
++;
2270 /* Make sure no local variables remain set up with buffer B
2271 for their current values. */
2274 swap_out_buffer_local_variables (b
)
2277 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2279 XSETBUFFER (buffer
, b
);
2280 oalist
= b
->local_var_alist
;
2282 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2284 sym
= XCAR (XCAR (alist
));
2286 /* Need not do anything if some other buffer's binding is now encached. */
2287 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2288 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2290 /* Symbol is set up for this buffer's old local value.
2291 Set it up for the current buffer with the default value. */
2293 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2294 /* Store the symbol's current value into the alist entry
2295 it is currently set up for. This is so that, if the
2296 local is marked permanent, and we make it local again
2297 later in Fkill_all_local_variables, we don't lose the value. */
2298 XSETCDR (XCAR (tem
),
2299 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2300 /* Switch to the symbol's default-value alist entry. */
2302 /* Mark it as current for buffer B. */
2303 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2304 /* Store the current value into any forwarding in the symbol. */
2305 store_symval_forwarding (sym
,
2306 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2312 /* Find all the overlays in the current buffer that contain position POS.
2313 Return the number found, and store them in a vector in *VEC_PTR.
2314 Store in *LEN_PTR the size allocated for the vector.
2315 Store in *NEXT_PTR the next position after POS where an overlay starts,
2316 or ZV if there are no more overlays.
2317 Store in *PREV_PTR the previous position before POS where an overlay ends,
2318 or where an overlay starts which ends at or after POS;
2319 or BEGV if there are no such overlays.
2320 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2322 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2323 when this function is called.
2325 If EXTEND is non-zero, we make the vector bigger if necessary.
2326 If EXTEND is zero, we never extend the vector,
2327 and we store only as many overlays as will fit.
2328 But we still return the total number of overlays.
2330 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2331 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2332 default (BEGV or ZV). */
2335 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2338 Lisp_Object
**vec_ptr
;
2344 Lisp_Object tail
, overlay
, start
, end
;
2347 Lisp_Object
*vec
= *vec_ptr
;
2350 int inhibit_storing
= 0;
2352 for (tail
= current_buffer
->overlays_before
;
2356 int startpos
, endpos
;
2358 overlay
= XCAR (tail
);
2360 start
= OVERLAY_START (overlay
);
2361 end
= OVERLAY_END (overlay
);
2362 endpos
= OVERLAY_POSITION (end
);
2369 startpos
= OVERLAY_POSITION (start
);
2370 /* This one ends at or after POS
2371 so its start counts for PREV_PTR if it's before POS. */
2372 if (prev
< startpos
&& startpos
< pos
)
2376 if (startpos
<= pos
)
2380 /* The supplied vector is full.
2381 Either make it bigger, or don't store any more in it. */
2384 /* Make it work with an initial len == 0. */
2389 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2393 inhibit_storing
= 1;
2396 if (!inhibit_storing
)
2398 /* Keep counting overlays even if we can't return them all. */
2401 else if (startpos
< next
)
2405 for (tail
= current_buffer
->overlays_after
;
2409 int startpos
, endpos
;
2411 overlay
= XCAR (tail
);
2413 start
= OVERLAY_START (overlay
);
2414 end
= OVERLAY_END (overlay
);
2415 startpos
= OVERLAY_POSITION (start
);
2418 if (startpos
< next
)
2422 endpos
= OVERLAY_POSITION (end
);
2429 *len_ptr
= len
*= 2;
2432 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2436 inhibit_storing
= 1;
2439 if (!inhibit_storing
)
2443 if (startpos
< pos
&& startpos
> prev
)
2446 else if (endpos
< pos
&& endpos
> prev
)
2448 else if (endpos
== pos
&& startpos
> prev
2449 && (!change_req
|| startpos
< pos
))
2460 /* Find all the overlays in the current buffer that overlap the range BEG-END
2461 or are empty at BEG.
2463 Return the number found, and store them in a vector in *VEC_PTR.
2464 Store in *LEN_PTR the size allocated for the vector.
2465 Store in *NEXT_PTR the next position after POS where an overlay starts,
2466 or ZV if there are no more overlays.
2467 Store in *PREV_PTR the previous position before POS where an overlay ends,
2468 or BEGV if there are no previous overlays.
2469 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2471 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2472 when this function is called.
2474 If EXTEND is non-zero, we make the vector bigger if necessary.
2475 If EXTEND is zero, we never extend the vector,
2476 and we store only as many overlays as will fit.
2477 But we still return the total number of overlays. */
2480 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2483 Lisp_Object
**vec_ptr
;
2488 Lisp_Object tail
, overlay
, ostart
, oend
;
2491 Lisp_Object
*vec
= *vec_ptr
;
2494 int inhibit_storing
= 0;
2496 for (tail
= current_buffer
->overlays_before
;
2500 int startpos
, endpos
;
2502 overlay
= XCAR (tail
);
2504 ostart
= OVERLAY_START (overlay
);
2505 oend
= OVERLAY_END (overlay
);
2506 endpos
= OVERLAY_POSITION (oend
);
2513 startpos
= OVERLAY_POSITION (ostart
);
2514 /* Count an interval if it either overlaps the range
2515 or is empty at the start of the range. */
2516 if ((beg
< endpos
&& startpos
< end
)
2517 || (startpos
== endpos
&& beg
== endpos
))
2521 /* The supplied vector is full.
2522 Either make it bigger, or don't store any more in it. */
2525 *len_ptr
= len
*= 2;
2526 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2530 inhibit_storing
= 1;
2533 if (!inhibit_storing
)
2535 /* Keep counting overlays even if we can't return them all. */
2538 else if (startpos
< next
)
2542 for (tail
= current_buffer
->overlays_after
;
2546 int startpos
, endpos
;
2548 overlay
= XCAR (tail
);
2550 ostart
= OVERLAY_START (overlay
);
2551 oend
= OVERLAY_END (overlay
);
2552 startpos
= OVERLAY_POSITION (ostart
);
2555 if (startpos
< next
)
2559 endpos
= OVERLAY_POSITION (oend
);
2560 /* Count an interval if it either overlaps the range
2561 or is empty at the start of the range. */
2562 if ((beg
< endpos
&& startpos
< end
)
2563 || (startpos
== endpos
&& beg
== endpos
))
2569 *len_ptr
= len
*= 2;
2570 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2574 inhibit_storing
= 1;
2577 if (!inhibit_storing
)
2581 else if (endpos
< beg
&& endpos
> prev
)
2593 /* Return non-zero if there exists an overlay with a non-nil
2594 `mouse-face' property overlapping OVERLAY. */
2597 mouse_face_overlay_overlaps (overlay
)
2598 Lisp_Object overlay
;
2600 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2601 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2603 Lisp_Object
*v
, tem
;
2606 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2607 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2610 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2611 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2614 for (i
= 0; i
< n
; ++i
)
2615 if (!EQ (v
[i
], overlay
)
2616 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2625 /* Fast function to just test if we're at an overlay boundary. */
2627 overlay_touches_p (pos
)
2630 Lisp_Object tail
, overlay
;
2632 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2637 overlay
= XCAR (tail
);
2638 if (!GC_OVERLAYP (overlay
))
2641 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2644 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2648 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2653 overlay
= XCAR (tail
);
2654 if (!GC_OVERLAYP (overlay
))
2657 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2660 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2668 Lisp_Object overlay
;
2674 compare_overlays (v1
, v2
)
2675 const void *v1
, *v2
;
2677 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2678 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2679 if (s1
->priority
!= s2
->priority
)
2680 return s1
->priority
- s2
->priority
;
2681 if (s1
->beg
!= s2
->beg
)
2682 return s1
->beg
- s2
->beg
;
2683 if (s1
->end
!= s2
->end
)
2684 return s2
->end
- s1
->end
;
2688 /* Sort an array of overlays by priority. The array is modified in place.
2689 The return value is the new size; this may be smaller than the original
2690 size if some of the overlays were invalid or were window-specific. */
2692 sort_overlays (overlay_vec
, noverlays
, w
)
2693 Lisp_Object
*overlay_vec
;
2698 struct sortvec
*sortvec
;
2699 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2701 /* Put the valid and relevant overlays into sortvec. */
2703 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2706 Lisp_Object overlay
;
2708 overlay
= overlay_vec
[i
];
2709 if (OVERLAY_VALID (overlay
)
2710 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2711 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2713 /* If we're interested in a specific window, then ignore
2714 overlays that are limited to some other window. */
2719 window
= Foverlay_get (overlay
, Qwindow
);
2720 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2724 /* This overlay is good and counts: put it into sortvec. */
2725 sortvec
[j
].overlay
= overlay
;
2726 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2727 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2728 tem
= Foverlay_get (overlay
, Qpriority
);
2730 sortvec
[j
].priority
= XINT (tem
);
2732 sortvec
[j
].priority
= 0;
2738 /* Sort the overlays into the proper order: increasing priority. */
2741 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2743 for (i
= 0; i
< noverlays
; i
++)
2744 overlay_vec
[i
] = sortvec
[i
].overlay
;
2750 Lisp_Object string
, string2
;
2757 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2758 int size
; /* Allocated length of that array. */
2759 int used
; /* How much of the array is currently in use. */
2760 int bytes
; /* Total length of the strings in buf. */
2763 /* Buffers for storing information about the overlays touching a given
2764 position. These could be automatic variables in overlay_strings, but
2765 it's more efficient to hold onto the memory instead of repeatedly
2766 allocating and freeing it. */
2767 static struct sortstrlist overlay_heads
, overlay_tails
;
2768 static unsigned char *overlay_str_buf
;
2770 /* Allocated length of overlay_str_buf. */
2771 static int overlay_str_len
;
2773 /* A comparison function suitable for passing to qsort. */
2775 cmp_for_strings (as1
, as2
)
2778 struct sortstr
*s1
= (struct sortstr
*)as1
;
2779 struct sortstr
*s2
= (struct sortstr
*)as2
;
2780 if (s1
->size
!= s2
->size
)
2781 return s2
->size
- s1
->size
;
2782 if (s1
->priority
!= s2
->priority
)
2783 return s1
->priority
- s2
->priority
;
2788 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2789 struct sortstrlist
*ssl
;
2790 Lisp_Object str
, str2
, pri
;
2795 if (ssl
->used
== ssl
->size
)
2801 ssl
->buf
= ((struct sortstr
*)
2802 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2804 ssl
->buf
[ssl
->used
].string
= str
;
2805 ssl
->buf
[ssl
->used
].string2
= str2
;
2806 ssl
->buf
[ssl
->used
].size
= size
;
2807 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2810 if (NILP (current_buffer
->enable_multibyte_characters
))
2811 nbytes
= XSTRING (str
)->size
;
2812 else if (! STRING_MULTIBYTE (str
))
2813 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2814 STRING_BYTES (XSTRING (str
)));
2816 nbytes
= STRING_BYTES (XSTRING (str
));
2818 ssl
->bytes
+= nbytes
;
2822 if (NILP (current_buffer
->enable_multibyte_characters
))
2823 nbytes
= XSTRING (str2
)->size
;
2824 else if (! STRING_MULTIBYTE (str2
))
2825 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2826 STRING_BYTES (XSTRING (str2
)));
2828 nbytes
= STRING_BYTES (XSTRING (str2
));
2830 ssl
->bytes
+= nbytes
;
2834 /* Return the concatenation of the strings associated with overlays that
2835 begin or end at POS, ignoring overlays that are specific to a window
2836 other than W. The strings are concatenated in the appropriate order:
2837 shorter overlays nest inside longer ones, and higher priority inside
2838 lower. Normally all of the after-strings come first, but zero-sized
2839 overlays have their after-strings ride along with the before-strings
2840 because it would look strange to print them inside-out.
2842 Returns the string length, and stores the contents indirectly through
2843 PSTR, if that variable is non-null. The string may be overwritten by
2844 subsequent calls. */
2847 overlay_strings (pos
, w
, pstr
)
2850 unsigned char **pstr
;
2852 Lisp_Object ov
, overlay
, window
, str
;
2853 int startpos
, endpos
;
2854 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2856 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2857 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2858 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCDR (ov
))
2860 overlay
= XCAR (ov
);
2861 if (!OVERLAYP (overlay
))
2864 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2865 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2868 if (endpos
!= pos
&& startpos
!= pos
)
2870 window
= Foverlay_get (overlay
, Qwindow
);
2871 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2874 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2875 record_overlay_string (&overlay_heads
, str
,
2877 ? Foverlay_get (overlay
, Qafter_string
)
2879 Foverlay_get (overlay
, Qpriority
),
2881 else if (endpos
== pos
2882 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2883 record_overlay_string (&overlay_tails
, str
, Qnil
,
2884 Foverlay_get (overlay
, Qpriority
),
2887 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCDR (ov
))
2889 overlay
= XCAR (ov
);
2890 if (!OVERLAYP (overlay
))
2893 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2894 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2897 if (endpos
!= pos
&& startpos
!= pos
)
2899 window
= Foverlay_get (overlay
, Qwindow
);
2900 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2903 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2904 record_overlay_string (&overlay_heads
, str
,
2906 ? Foverlay_get (overlay
, Qafter_string
)
2908 Foverlay_get (overlay
, Qpriority
),
2910 else if (endpos
== pos
2911 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2912 record_overlay_string (&overlay_tails
, str
, Qnil
,
2913 Foverlay_get (overlay
, Qpriority
),
2916 if (overlay_tails
.used
> 1)
2917 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2919 if (overlay_heads
.used
> 1)
2920 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2922 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2927 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2929 if (total
> overlay_str_len
)
2931 overlay_str_len
= total
;
2932 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2935 p
= overlay_str_buf
;
2936 for (i
= overlay_tails
.used
; --i
>= 0;)
2939 tem
= overlay_tails
.buf
[i
].string
;
2940 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2941 STRING_BYTES (XSTRING (tem
)),
2942 STRING_MULTIBYTE (tem
), multibyte
);
2945 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2948 tem
= overlay_heads
.buf
[i
].string
;
2949 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2950 STRING_BYTES (XSTRING (tem
)),
2951 STRING_MULTIBYTE (tem
), multibyte
);
2953 tem
= overlay_heads
.buf
[i
].string2
;
2956 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2957 STRING_BYTES (XSTRING (tem
)),
2958 STRING_MULTIBYTE (tem
), multibyte
);
2962 if (p
!= overlay_str_buf
+ total
)
2965 *pstr
= overlay_str_buf
;
2971 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2974 recenter_overlay_lists (buf
, pos
)
2978 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2980 /* See if anything in overlays_before should move to overlays_after. */
2982 /* We don't strictly need prev in this loop; it should always be nil.
2983 But we use it for symmetry and in case that should cease to be true
2984 with some future change. */
2986 for (tail
= buf
->overlays_before
;
2988 prev
= tail
, tail
= next
)
2991 overlay
= XCAR (tail
);
2993 /* If the overlay is not valid, get rid of it. */
2994 if (!OVERLAY_VALID (overlay
))
2999 /* Splice the cons cell TAIL out of overlays_before. */
3003 buf
->overlays_before
= next
;
3009 beg
= OVERLAY_START (overlay
);
3010 end
= OVERLAY_END (overlay
);
3012 if (OVERLAY_POSITION (end
) > pos
)
3014 /* OVERLAY needs to be moved. */
3015 int where
= OVERLAY_POSITION (beg
);
3016 Lisp_Object other
, other_prev
;
3018 /* Splice the cons cell TAIL out of overlays_before. */
3020 XSETCDR (prev
, next
);
3022 buf
->overlays_before
= next
;
3024 /* Search thru overlays_after for where to put it. */
3026 for (other
= buf
->overlays_after
;
3028 other_prev
= other
, other
= XCDR (other
))
3030 Lisp_Object otherbeg
, otheroverlay
;
3032 otheroverlay
= XCAR (other
);
3033 if (! OVERLAY_VALID (otheroverlay
))
3036 otherbeg
= OVERLAY_START (otheroverlay
);
3037 if (OVERLAY_POSITION (otherbeg
) >= where
)
3041 /* Add TAIL to overlays_after before OTHER. */
3042 XSETCDR (tail
, other
);
3043 if (!NILP (other_prev
))
3044 XSETCDR (other_prev
, tail
);
3046 buf
->overlays_after
= tail
;
3050 /* We've reached the things that should stay in overlays_before.
3051 All the rest of overlays_before must end even earlier,
3056 /* See if anything in overlays_after should be in overlays_before. */
3058 for (tail
= buf
->overlays_after
;
3060 prev
= tail
, tail
= next
)
3063 overlay
= XCAR (tail
);
3065 /* If the overlay is not valid, get rid of it. */
3066 if (!OVERLAY_VALID (overlay
))
3071 /* Splice the cons cell TAIL out of overlays_after. */
3075 buf
->overlays_after
= next
;
3081 beg
= OVERLAY_START (overlay
);
3082 end
= OVERLAY_END (overlay
);
3084 /* Stop looking, when we know that nothing further
3085 can possibly end before POS. */
3086 if (OVERLAY_POSITION (beg
) > pos
)
3089 if (OVERLAY_POSITION (end
) <= pos
)
3091 /* OVERLAY needs to be moved. */
3092 int where
= OVERLAY_POSITION (end
);
3093 Lisp_Object other
, other_prev
;
3095 /* Splice the cons cell TAIL out of overlays_after. */
3097 XSETCDR (prev
, next
);
3099 buf
->overlays_after
= next
;
3101 /* Search thru overlays_before for where to put it. */
3103 for (other
= buf
->overlays_before
;
3105 other_prev
= other
, other
= XCDR (other
))
3107 Lisp_Object otherend
, otheroverlay
;
3109 otheroverlay
= XCAR (other
);
3110 if (! OVERLAY_VALID (otheroverlay
))
3113 otherend
= OVERLAY_END (otheroverlay
);
3114 if (OVERLAY_POSITION (otherend
) <= where
)
3118 /* Add TAIL to overlays_before before OTHER. */
3119 XSETCDR (tail
, other
);
3120 if (!NILP (other_prev
))
3121 XSETCDR (other_prev
, tail
);
3123 buf
->overlays_before
= tail
;
3128 XSETFASTINT (buf
->overlay_center
, pos
);
3132 adjust_overlays_for_insert (pos
, length
)
3136 /* After an insertion, the lists are still sorted properly,
3137 but we may need to update the value of the overlay center. */
3138 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
3139 XSETFASTINT (current_buffer
->overlay_center
,
3140 XFASTINT (current_buffer
->overlay_center
) + length
);
3144 adjust_overlays_for_delete (pos
, length
)
3148 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
3149 /* The deletion was to our right. No change needed; the before- and
3150 after-lists are still consistent. */
3152 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
3153 /* The deletion was to our left. We need to adjust the center value
3154 to account for the change in position, but the lists are consistent
3155 given the new value. */
3156 XSETFASTINT (current_buffer
->overlay_center
,
3157 XFASTINT (current_buffer
->overlay_center
) - length
);
3159 /* We're right in the middle. There might be things on the after-list
3160 that now belong on the before-list. Recentering will move them,
3161 and also update the center point. */
3162 recenter_overlay_lists (current_buffer
, pos
);
3165 /* Fix up overlays that were garbled as a result of permuting markers
3166 in the range START through END. Any overlay with at least one
3167 endpoint in this range will need to be unlinked from the overlay
3168 list and reinserted in its proper place.
3169 Such an overlay might even have negative size at this point.
3170 If so, we'll reverse the endpoints. Can you think of anything
3171 better to do in this situation? */
3173 fix_overlays_in_range (start
, end
)
3174 register int start
, end
;
3176 Lisp_Object overlay
;
3177 Lisp_Object before_list
, after_list
;
3178 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
3179 int startpos
, endpos
;
3181 /* This algorithm shifts links around instead of consing and GCing.
3182 The loop invariant is that before_list (resp. after_list) is a
3183 well-formed list except that its last element, the one that
3184 *pbefore (resp. *pafter) points to, is still uninitialized.
3185 So it's not a bug that before_list isn't initialized, although
3186 it may look strange. */
3187 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
3189 overlay
= XCAR (*ptail
);
3190 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3193 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3195 || (startpos
>= start
&& startpos
< end
))
3197 /* If the overlay is backwards, fix that now. */
3198 if (startpos
> endpos
)
3201 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3203 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3205 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3207 /* Add it to the end of the wrong list. Later on,
3208 recenter_overlay_lists will move it to the right place. */
3209 if (endpos
< XINT (current_buffer
->overlay_center
))
3212 pafter
= &XCDR (*ptail
);
3217 pbefore
= &XCDR (*ptail
);
3219 *ptail
= XCDR (*ptail
);
3222 ptail
= &XCDR (*ptail
);
3224 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
3226 overlay
= XCAR (*ptail
);
3227 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3228 if (startpos
>= end
)
3230 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3231 if (startpos
>= start
3232 || (endpos
>= start
&& endpos
< end
))
3234 if (startpos
> endpos
)
3237 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3239 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3241 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3243 if (endpos
< XINT (current_buffer
->overlay_center
))
3246 pafter
= &XCDR (*ptail
);
3251 pbefore
= &XCDR (*ptail
);
3253 *ptail
= XCDR (*ptail
);
3256 ptail
= &XCDR (*ptail
);
3259 /* Splice the constructed (wrong) lists into the buffer's lists,
3260 and let the recenter function make it sane again. */
3261 *pbefore
= current_buffer
->overlays_before
;
3262 current_buffer
->overlays_before
= before_list
;
3263 recenter_overlay_lists (current_buffer
,
3264 XINT (current_buffer
->overlay_center
));
3266 *pafter
= current_buffer
->overlays_after
;
3267 current_buffer
->overlays_after
= after_list
;
3268 recenter_overlay_lists (current_buffer
,
3269 XINT (current_buffer
->overlay_center
));
3272 /* We have two types of overlay: the one whose ending marker is
3273 after-insertion-marker (this is the usual case) and the one whose
3274 ending marker is before-insertion-marker. When `overlays_before'
3275 contains overlays of the latter type and the former type in this
3276 order and both overlays end at inserting position, inserting a text
3277 increases only the ending marker of the latter type, which results
3278 in incorrect ordering of `overlays_before'.
3280 This function fixes ordering of overlays in the slot
3281 `overlays_before' of the buffer *BP. Before the insertion, `point'
3282 was at PREV, and now is at POS. */
3285 fix_overlays_before (bp
, prev
, pos
)
3289 Lisp_Object
*tailp
= &bp
->overlays_before
;
3290 Lisp_Object
*right_place
;
3293 /* After the insertion, the several overlays may be in incorrect
3294 order. The possibility is that, in the list `overlays_before',
3295 an overlay which ends at POS appears after an overlay which ends
3296 at PREV. Since POS is greater than PREV, we must fix the
3297 ordering of these overlays, by moving overlays ends at POS before
3298 the overlays ends at PREV. */
3300 /* At first, find a place where disordered overlays should be linked
3301 in. It is where an overlay which end before POS exists. (i.e. an
3302 overlay whose ending marker is after-insertion-marker if disorder
3304 while (!NILP (*tailp
)
3305 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp
))))
3307 tailp
= &XCDR (*tailp
);
3309 /* If we don't find such an overlay,
3310 or the found one ends before PREV,
3311 or the found one is the last one in the list,
3312 we don't have to fix anything. */
3315 || NILP (XCDR (*tailp
)))
3318 right_place
= tailp
;
3319 tailp
= &XCDR (*tailp
);
3321 /* Now, end position of overlays in the list *TAILP should be before
3322 or equal to PREV. In the loop, an overlay which ends at POS is
3323 moved ahead to the place pointed by RIGHT_PLACE. If we found an
3324 overlay which ends before PREV, the remaining overlays are in
3326 while (!NILP (*tailp
))
3328 end
= OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp
)));
3331 { /* This overlay is disordered. */
3332 Lisp_Object found
= *tailp
;
3334 /* Unlink the found overlay. */
3335 *tailp
= XCDR (found
);
3336 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
3337 XCDR (found
) = *right_place
;
3338 /* Link it into the right place. */
3339 *right_place
= found
;
3341 else if (end
== prev
)
3342 tailp
= &XCDR (*tailp
);
3343 else /* No more disordered overlay. */
3348 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3349 doc
: /* Return t if OBJECT is an overlay. */)
3353 return (OVERLAYP (object
) ? Qt
: Qnil
);
3356 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3357 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3358 If omitted, BUFFER defaults to the current buffer.
3359 BEG and END may be integers or markers.
3360 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3361 front delimiter advance when text is inserted there.
3362 The fifth arg REAR-ADVANCE, if non-nil, makes the
3363 rear delimiter advance when text is inserted there. */)
3364 (beg
, end
, buffer
, front_advance
, rear_advance
)
3365 Lisp_Object beg
, end
, buffer
;
3366 Lisp_Object front_advance
, rear_advance
;
3368 Lisp_Object overlay
;
3372 XSETBUFFER (buffer
, current_buffer
);
3374 CHECK_BUFFER (buffer
, 2);
3376 && ! EQ (Fmarker_buffer (beg
), buffer
))
3377 error ("Marker points into wrong buffer");
3379 && ! EQ (Fmarker_buffer (end
), buffer
))
3380 error ("Marker points into wrong buffer");
3382 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3383 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3385 if (XINT (beg
) > XINT (end
))
3388 temp
= beg
; beg
= end
; end
= temp
;
3391 b
= XBUFFER (buffer
);
3393 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3394 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3396 if (!NILP (front_advance
))
3397 XMARKER (beg
)->insertion_type
= 1;
3398 if (!NILP (rear_advance
))
3399 XMARKER (end
)->insertion_type
= 1;
3401 overlay
= allocate_misc ();
3402 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3403 XOVERLAY (overlay
)->start
= beg
;
3404 XOVERLAY (overlay
)->end
= end
;
3405 XOVERLAY (overlay
)->plist
= Qnil
;
3407 /* Put the new overlay on the wrong list. */
3408 end
= OVERLAY_END (overlay
);
3409 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3410 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3412 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3414 /* This puts it in the right list, and in the right order. */
3415 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3417 /* We don't need to redisplay the region covered by the overlay, because
3418 the overlay has no properties at the moment. */
3423 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3426 modify_overlay (buf
, start
, end
)
3437 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3439 /* If this is a buffer not in the selected window,
3440 we must do other windows. */
3441 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3442 windows_or_buffers_changed
= 1;
3443 /* If multiple windows show this buffer, we must do other windows. */
3444 else if (buffer_shared
> 1)
3445 windows_or_buffers_changed
= 1;
3447 ++BUF_OVERLAY_MODIFF (buf
);
3451 Lisp_Object
Fdelete_overlay ();
3453 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3454 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3455 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3456 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3458 (overlay
, beg
, end
, buffer
)
3459 Lisp_Object overlay
, beg
, end
, buffer
;
3461 struct buffer
*b
, *ob
;
3462 Lisp_Object obuffer
;
3463 int count
= specpdl_ptr
- specpdl
;
3465 CHECK_OVERLAY (overlay
, 0);
3467 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3469 XSETBUFFER (buffer
, current_buffer
);
3470 CHECK_BUFFER (buffer
, 3);
3473 && ! EQ (Fmarker_buffer (beg
), buffer
))
3474 error ("Marker points into wrong buffer");
3476 && ! EQ (Fmarker_buffer (end
), buffer
))
3477 error ("Marker points into wrong buffer");
3479 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3480 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3482 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3483 return Fdelete_overlay (overlay
);
3485 if (XINT (beg
) > XINT (end
))
3488 temp
= beg
; beg
= end
; end
= temp
;
3491 specbind (Qinhibit_quit
, Qt
);
3493 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3494 b
= XBUFFER (buffer
);
3495 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3497 /* If the overlay has changed buffers, do a thorough redisplay. */
3498 if (!EQ (buffer
, obuffer
))
3500 /* Redisplay where the overlay was. */
3501 if (!NILP (obuffer
))
3506 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3507 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3509 modify_overlay (ob
, o_beg
, o_end
);
3512 /* Redisplay where the overlay is going to be. */
3513 modify_overlay (b
, XINT (beg
), XINT (end
));
3516 /* Redisplay the area the overlay has just left, or just enclosed. */
3520 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3521 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3523 if (o_beg
== XINT (beg
))
3524 modify_overlay (b
, o_end
, XINT (end
));
3525 else if (o_end
== XINT (end
))
3526 modify_overlay (b
, o_beg
, XINT (beg
));
3529 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3530 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3531 modify_overlay (b
, o_beg
, o_end
);
3535 if (!NILP (obuffer
))
3537 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3538 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3541 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3542 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3544 /* Put the overlay on the wrong list. */
3545 end
= OVERLAY_END (overlay
);
3546 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3547 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3549 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3551 /* This puts it in the right list, and in the right order. */
3552 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3554 return unbind_to (count
, overlay
);
3557 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3558 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3560 Lisp_Object overlay
;
3564 int count
= specpdl_ptr
- specpdl
;
3566 CHECK_OVERLAY (overlay
, 0);
3568 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3572 b
= XBUFFER (buffer
);
3573 specbind (Qinhibit_quit
, Qt
);
3575 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3576 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3578 marker_position (OVERLAY_START (overlay
)),
3579 marker_position (OVERLAY_END (overlay
)));
3580 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3581 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3583 /* When deleting an overlay with before or after strings, turn off
3584 display optimizations for the affected buffer, on the basis that
3585 these strings may contain newlines. This is easier to do than to
3586 check for that situation during redisplay. */
3587 if (!windows_or_buffers_changed
3588 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3589 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3590 b
->prevent_redisplay_optimizations_p
= 1;
3592 return unbind_to (count
, Qnil
);
3595 /* Overlay dissection functions. */
3597 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3598 doc
: /* Return the position at which OVERLAY starts. */)
3600 Lisp_Object overlay
;
3602 CHECK_OVERLAY (overlay
, 0);
3604 return (Fmarker_position (OVERLAY_START (overlay
)));
3607 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3608 doc
: /* Return the position at which OVERLAY ends. */)
3610 Lisp_Object overlay
;
3612 CHECK_OVERLAY (overlay
, 0);
3614 return (Fmarker_position (OVERLAY_END (overlay
)));
3617 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3618 doc
: /* Return the buffer OVERLAY belongs to. */)
3620 Lisp_Object overlay
;
3622 CHECK_OVERLAY (overlay
, 0);
3624 return Fmarker_buffer (OVERLAY_START (overlay
));
3627 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3628 doc
: /* Return a list of the properties on OVERLAY.
3629 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3632 Lisp_Object overlay
;
3634 CHECK_OVERLAY (overlay
, 0);
3636 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3640 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3641 doc
: /* Return a list of the overlays that contain position POS. */)
3646 Lisp_Object
*overlay_vec
;
3650 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3653 /* We can't use alloca here because overlays_at can call xrealloc. */
3654 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3656 /* Put all the overlays we want in a vector in overlay_vec.
3657 Store the length in len. */
3658 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3659 (int *) 0, (int *) 0, 0);
3661 /* Make a list of them all. */
3662 result
= Flist (noverlays
, overlay_vec
);
3664 xfree (overlay_vec
);
3668 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3669 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3670 Overlap means that at least one character is contained within the overlay
3671 and also contained within the specified region.
3672 Empty overlays are included in the result if they are located at BEG
3673 or between BEG and END. */)
3675 Lisp_Object beg
, end
;
3678 Lisp_Object
*overlay_vec
;
3682 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
3683 CHECK_NUMBER_COERCE_MARKER (end
, 0);
3686 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3688 /* Put all the overlays we want in a vector in overlay_vec.
3689 Store the length in len. */
3690 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3691 (int *) 0, (int *) 0);
3693 /* Make a list of them all. */
3694 result
= Flist (noverlays
, overlay_vec
);
3696 xfree (overlay_vec
);
3700 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3702 doc
: /* Return the next position after POS where an overlay starts or ends.
3703 If there are no more overlay boundaries after POS, return (point-max). */)
3709 Lisp_Object
*overlay_vec
;
3713 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3716 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3718 /* Put all the overlays we want in a vector in overlay_vec.
3719 Store the length in len.
3720 endpos gets the position where the next overlay starts. */
3721 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3722 &endpos
, (int *) 0, 1);
3724 /* If any of these overlays ends before endpos,
3725 use its ending point instead. */
3726 for (i
= 0; i
< noverlays
; i
++)
3731 oend
= OVERLAY_END (overlay_vec
[i
]);
3732 oendpos
= OVERLAY_POSITION (oend
);
3733 if (oendpos
< endpos
)
3737 xfree (overlay_vec
);
3738 return make_number (endpos
);
3741 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3742 Sprevious_overlay_change
, 1, 1, 0,
3743 doc
: /* Return the previous position before POS where an overlay starts or ends.
3744 If there are no more overlay boundaries before POS, return (point-min). */)
3750 Lisp_Object
*overlay_vec
;
3753 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3755 /* At beginning of buffer, we know the answer;
3756 avoid bug subtracting 1 below. */
3757 if (XINT (pos
) == BEGV
)
3761 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3763 /* Put all the overlays we want in a vector in overlay_vec.
3764 Store the length in len.
3765 prevpos gets the position of the previous change. */
3766 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3767 (int *) 0, &prevpos
, 1);
3769 xfree (overlay_vec
);
3770 return make_number (prevpos
);
3773 /* These functions are for debugging overlays. */
3775 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3776 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3777 The car has all the overlays before the overlay center;
3778 the cdr has all the overlays after the overlay center.
3779 Recentering overlays moves overlays between these lists.
3780 The lists you get are copies, so that changing them has no effect.
3781 However, the overlays you get are the real objects that the buffer uses. */)
3784 Lisp_Object before
, after
;
3785 before
= current_buffer
->overlays_before
;
3787 before
= Fcopy_sequence (before
);
3788 after
= current_buffer
->overlays_after
;
3790 after
= Fcopy_sequence (after
);
3792 return Fcons (before
, after
);
3795 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3796 doc
: /* Recenter the overlays of the current buffer around position POS. */)
3800 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3802 recenter_overlay_lists (current_buffer
, XINT (pos
));
3806 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3807 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
3809 Lisp_Object overlay
, prop
;
3811 Lisp_Object plist
, fallback
;
3813 CHECK_OVERLAY (overlay
, 0);
3817 for (plist
= XOVERLAY (overlay
)->plist
;
3818 CONSP (plist
) && CONSP (XCDR (plist
));
3819 plist
= XCDR (XCDR (plist
)))
3821 if (EQ (XCAR (plist
), prop
))
3822 return XCAR (XCDR (plist
));
3823 else if (EQ (XCAR (plist
), Qcategory
))
3826 tem
= Fcar (Fcdr (plist
));
3828 fallback
= Fget (tem
, prop
);
3835 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3836 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
3837 (overlay
, prop
, value
)
3838 Lisp_Object overlay
, prop
, value
;
3840 Lisp_Object tail
, buffer
;
3843 CHECK_OVERLAY (overlay
, 0);
3845 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3847 for (tail
= XOVERLAY (overlay
)->plist
;
3848 CONSP (tail
) && CONSP (XCDR (tail
));
3849 tail
= XCDR (XCDR (tail
)))
3850 if (EQ (XCAR (tail
), prop
))
3852 changed
= !EQ (XCAR (XCDR (tail
)), value
);
3853 XSETCAR (XCDR (tail
), value
);
3856 /* It wasn't in the list, so add it to the front. */
3857 changed
= !NILP (value
);
3858 XOVERLAY (overlay
)->plist
3859 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3861 if (! NILP (buffer
))
3864 modify_overlay (XBUFFER (buffer
),
3865 marker_position (OVERLAY_START (overlay
)),
3866 marker_position (OVERLAY_END (overlay
)));
3867 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3868 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3869 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3870 Fdelete_overlay (overlay
);
3875 /* Subroutine of report_overlay_modification. */
3877 /* Lisp vector holding overlay hook functions to call.
3878 Vector elements come in pairs.
3879 Each even-index element is a list of hook functions.
3880 The following odd-index element is the overlay they came from.
3882 Before the buffer change, we fill in this vector
3883 as we call overlay hook functions.
3884 After the buffer change, we get the functions to call from this vector.
3885 This way we always call the same functions before and after the change. */
3886 static Lisp_Object last_overlay_modification_hooks
;
3888 /* Number of elements actually used in last_overlay_modification_hooks. */
3889 static int last_overlay_modification_hooks_used
;
3891 /* Add one functionlist/overlay pair
3892 to the end of last_overlay_modification_hooks. */
3895 add_overlay_mod_hooklist (functionlist
, overlay
)
3896 Lisp_Object functionlist
, overlay
;
3898 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3900 if (last_overlay_modification_hooks_used
== oldsize
)
3903 old
= last_overlay_modification_hooks
;
3904 last_overlay_modification_hooks
3905 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3906 bcopy (XVECTOR (old
)->contents
,
3907 XVECTOR (last_overlay_modification_hooks
)->contents
,
3908 sizeof (Lisp_Object
) * oldsize
);
3910 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3911 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3914 /* Run the modification-hooks of overlays that include
3915 any part of the text in START to END.
3916 If this change is an insertion, also
3917 run the insert-before-hooks of overlay starting at END,
3918 and the insert-after-hooks of overlay ending at START.
3920 This is called both before and after the modification.
3921 AFTER is nonzero when we call after the modification.
3923 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3924 When AFTER is nonzero, they are the start position,
3925 the position after the inserted new text,
3926 and the length of deleted or replaced old text. */
3929 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3930 Lisp_Object start
, end
;
3932 Lisp_Object arg1
, arg2
, arg3
;
3934 Lisp_Object prop
, overlay
, tail
;
3935 /* 1 if this change is an insertion. */
3936 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3938 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3942 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3946 /* Call the functions recorded in last_overlay_modification_hooks
3947 rather than scanning the overlays again.
3948 First copy the vector contents, in case some of these hooks
3949 do subsequent modification of the buffer. */
3950 int size
= last_overlay_modification_hooks_used
;
3951 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3954 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3955 copy
, size
* sizeof (Lisp_Object
));
3957 gcpro1
.nvars
= size
;
3959 for (i
= 0; i
< size
;)
3961 Lisp_Object prop
, overlay
;
3963 overlay
= copy
[i
++];
3964 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3970 /* We are being called before a change.
3971 Scan the overlays to find the functions to call. */
3972 last_overlay_modification_hooks_used
= 0;
3974 for (tail
= current_buffer
->overlays_before
;
3978 int startpos
, endpos
;
3979 Lisp_Object ostart
, oend
;
3981 overlay
= XCAR (tail
);
3983 ostart
= OVERLAY_START (overlay
);
3984 oend
= OVERLAY_END (overlay
);
3985 endpos
= OVERLAY_POSITION (oend
);
3986 if (XFASTINT (start
) > endpos
)
3988 startpos
= OVERLAY_POSITION (ostart
);
3989 if (insertion
&& (XFASTINT (start
) == startpos
3990 || XFASTINT (end
) == startpos
))
3992 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3995 /* Copy TAIL in case the hook recenters the overlay lists. */
3997 tail
= Fcopy_sequence (tail
);
3999 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4002 if (insertion
&& (XFASTINT (start
) == endpos
4003 || XFASTINT (end
) == endpos
))
4005 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4009 tail
= Fcopy_sequence (tail
);
4011 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4014 /* Test for intersecting intervals. This does the right thing
4015 for both insertion and deletion. */
4016 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4018 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4022 tail
= Fcopy_sequence (tail
);
4024 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4030 for (tail
= current_buffer
->overlays_after
;
4034 int startpos
, endpos
;
4035 Lisp_Object ostart
, oend
;
4037 overlay
= XCAR (tail
);
4039 ostart
= OVERLAY_START (overlay
);
4040 oend
= OVERLAY_END (overlay
);
4041 startpos
= OVERLAY_POSITION (ostart
);
4042 endpos
= OVERLAY_POSITION (oend
);
4043 if (XFASTINT (end
) < startpos
)
4045 if (insertion
&& (XFASTINT (start
) == startpos
4046 || XFASTINT (end
) == startpos
))
4048 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4052 tail
= Fcopy_sequence (tail
);
4054 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4057 if (insertion
&& (XFASTINT (start
) == endpos
4058 || XFASTINT (end
) == endpos
))
4060 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4064 tail
= Fcopy_sequence (tail
);
4066 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4069 /* Test for intersecting intervals. This does the right thing
4070 for both insertion and deletion. */
4071 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4073 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4077 tail
= Fcopy_sequence (tail
);
4079 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4088 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4089 Lisp_Object list
, overlay
;
4091 Lisp_Object arg1
, arg2
, arg3
;
4093 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4095 GCPRO4 (list
, arg1
, arg2
, arg3
);
4097 add_overlay_mod_hooklist (list
, overlay
);
4099 while (!NILP (list
))
4102 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4104 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4110 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4113 evaporate_overlays (pos
)
4116 Lisp_Object tail
, overlay
, hit_list
;
4119 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
4120 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
4124 overlay
= XCAR (tail
);
4125 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4128 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4129 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4130 hit_list
= Fcons (overlay
, hit_list
);
4133 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
4137 overlay
= XCAR (tail
);
4138 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4141 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4142 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4143 hit_list
= Fcons (overlay
, hit_list
);
4145 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4146 Fdelete_overlay (XCAR (hit_list
));
4149 /* Somebody has tried to store a value with an unacceptable type
4150 in the slot with offset OFFSET. */
4153 buffer_slot_type_mismatch (offset
)
4159 switch (XINT (PER_BUFFER_TYPE (offset
)))
4162 type_name
= "integers";
4166 type_name
= "strings";
4170 type_name
= "symbols";
4177 sym
= PER_BUFFER_SYMBOL (offset
);
4178 error ("Only %s should be stored in the buffer-local variable %s",
4179 type_name
, XSYMBOL (sym
)->name
->data
);
4183 /***********************************************************************
4184 Allocation with mmap
4185 ***********************************************************************/
4187 #ifdef USE_MMAP_FOR_BUFFERS
4189 #include <sys/types.h>
4190 #include <sys/mman.h>
4193 #ifdef MAP_ANONYMOUS
4194 #define MAP_ANON MAP_ANONYMOUS
4201 #define MAP_FAILED ((void *) -1)
4214 /* Memory is allocated in regions which are mapped using mmap(2).
4215 The current implementation lets the system select mapped
4216 addresses; we're not using MAP_FIXED in general, except when
4217 trying to enlarge regions.
4219 Each mapped region starts with a mmap_region structure, the user
4220 area starts after that structure, aligned to MEM_ALIGN.
4222 +-----------------------+
4223 | struct mmap_info + |
4225 +-----------------------+
4229 +-----------------------+ */
4233 /* User-specified size. */
4234 size_t nbytes_specified
;
4236 /* Number of bytes mapped */
4237 size_t nbytes_mapped
;
4239 /* Pointer to the location holding the address of the memory
4240 allocated with the mmap'd block. The variable actually points
4241 after this structure. */
4244 /* Next and previous in list of all mmap'd regions. */
4245 struct mmap_region
*next
, *prev
;
4248 /* Doubly-linked list of mmap'd regions. */
4250 static struct mmap_region
*mmap_regions
;
4252 /* File descriptor for mmap. If we don't have anonymous mapping,
4253 /dev/zero will be opened on it. */
4257 /* Temporary storage for mmap_set_vars, see there. */
4259 static struct mmap_region
*mmap_regions_1
;
4260 static int mmap_fd_1
;
4262 /* Page size on this system. */
4264 static int mmap_page_size
;
4266 /* 1 means mmap has been intialized. */
4268 static int mmap_initialized_p
;
4270 /* Value is X rounded up to the next multiple of N. */
4272 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4274 /* Size of mmap_region structure plus padding. */
4276 #define MMAP_REGION_STRUCT_SIZE \
4277 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4279 /* Given a pointer P to the start of the user-visible part of a mapped
4280 region, return a pointer to the start of the region. */
4282 #define MMAP_REGION(P) \
4283 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4285 /* Given a pointer P to the start of a mapped region, return a pointer
4286 to the start of the user-visible part of the region. */
4288 #define MMAP_USER_AREA(P) \
4289 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4291 #define MEM_ALIGN sizeof (double)
4293 /* Function prototypes. */
4295 static int mmap_free_1
P_ ((struct mmap_region
*));
4296 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4297 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4298 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4299 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4300 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4301 static void mmap_init
P_ ((void));
4304 /* Return a region overlapping address range START...END, or null if
4305 none. END is not including, i.e. the last byte in the range
4308 static struct mmap_region
*
4309 mmap_find (start
, end
)
4310 POINTER_TYPE
*start
, *end
;
4312 struct mmap_region
*r
;
4313 char *s
= (char *) start
, *e
= (char *) end
;
4315 for (r
= mmap_regions
; r
; r
= r
->next
)
4317 char *rstart
= (char *) r
;
4318 char *rend
= rstart
+ r
->nbytes_mapped
;
4320 if (/* First byte of range, i.e. START, in this region? */
4321 (s
>= rstart
&& s
< rend
)
4322 /* Last byte of range, i.e. END - 1, in this region? */
4323 || (e
> rstart
&& e
<= rend
)
4324 /* First byte of this region in the range? */
4325 || (rstart
>= s
&& rstart
< e
)
4326 /* Last byte of this region in the range? */
4327 || (rend
> s
&& rend
<= e
))
4335 /* Unmap a region. P is a pointer to the start of the user-araa of
4336 the region. Value is non-zero if successful. */
4340 struct mmap_region
*r
;
4343 r
->next
->prev
= r
->prev
;
4345 r
->prev
->next
= r
->next
;
4347 mmap_regions
= r
->next
;
4349 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4351 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4359 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4360 Value is non-zero if successful. */
4363 mmap_enlarge (r
, npages
)
4364 struct mmap_region
*r
;
4367 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4373 /* Unmap pages at the end of the region. */
4374 nbytes
= - npages
* mmap_page_size
;
4375 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4376 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4379 r
->nbytes_mapped
-= nbytes
;
4383 else if (npages
> 0)
4385 struct mmap_region
*r2
;
4387 nbytes
= npages
* mmap_page_size
;
4389 /* Try to map additional pages at the end of the region. We
4390 cannot do this if the address range is already occupied by
4391 something else because mmap deletes any previous mapping.
4392 I'm not sure this is worth doing, let's see. */
4393 r2
= mmap_find (region_end
, region_end
+ nbytes
);
4398 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4399 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4400 if (p
== MAP_FAILED
)
4401 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4402 else if (p
!= (POINTER_TYPE
*) region_end
)
4404 /* Kernels are free to choose a different address. In
4405 that case, unmap what we've mapped above; we have
4407 if (munmap (p
, nbytes
) == -1)
4408 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4412 r
->nbytes_mapped
+= nbytes
;
4422 /* Set or reset variables holding references to mapped regions. If
4423 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4424 non-zero, set all variables to the start of the user-areas
4427 This function is called from Fdump_emacs to ensure that the dumped
4428 Emacs doesn't contain references to memory that won't be mapped
4429 when Emacs starts. */
4432 mmap_set_vars (restore_p
)
4435 struct mmap_region
*r
;
4439 mmap_regions
= mmap_regions_1
;
4440 mmap_fd
= mmap_fd_1
;
4441 for (r
= mmap_regions
; r
; r
= r
->next
)
4442 *r
->var
= MMAP_USER_AREA (r
);
4446 for (r
= mmap_regions
; r
; r
= r
->next
)
4448 mmap_regions_1
= mmap_regions
;
4449 mmap_regions
= NULL
;
4450 mmap_fd_1
= mmap_fd
;
4456 /* Allocate a block of storage large enough to hold NBYTES bytes of
4457 data. A pointer to the data is returned in *VAR. VAR is thus the
4458 address of some variable which will use the data area.
4460 The allocation of 0 bytes is valid.
4462 If we can't allocate the necessary memory, set *VAR to null, and
4465 static POINTER_TYPE
*
4466 mmap_alloc (var
, nbytes
)
4475 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4476 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4479 if (p
== MAP_FAILED
)
4481 if (errno
!= ENOMEM
)
4482 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4487 struct mmap_region
*r
= (struct mmap_region
*) p
;
4489 r
->nbytes_specified
= nbytes
;
4490 r
->nbytes_mapped
= map
;
4493 r
->next
= mmap_regions
;
4498 p
= MMAP_USER_AREA (p
);
4505 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4506 resize it to size NBYTES. Change *VAR to reflect the new block,
4507 and return this value. If more memory cannot be allocated, then
4508 leave *VAR unchanged, and return null. */
4510 static POINTER_TYPE
*
4511 mmap_realloc (var
, nbytes
)
4515 POINTER_TYPE
*result
;
4520 result
= mmap_alloc (var
, nbytes
);
4521 else if (nbytes
== 0)
4524 result
= mmap_alloc (var
, nbytes
);
4528 struct mmap_region
*r
= MMAP_REGION (*var
);
4529 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4534 POINTER_TYPE
*old_ptr
= *var
;
4536 /* Try to map additional pages at the end of the region.
4537 If that fails, allocate a new region, copy data
4538 from the old region, then free it. */
4539 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4542 r
->nbytes_specified
= nbytes
;
4543 *var
= result
= old_ptr
;
4545 else if (mmap_alloc (var
, nbytes
))
4547 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4548 mmap_free_1 (MMAP_REGION (old_ptr
));
4550 r
= MMAP_REGION (result
);
4551 r
->nbytes_specified
= nbytes
;
4559 else if (room
- nbytes
>= mmap_page_size
)
4561 /* Shrinking by at least a page. Let's give some
4562 memory back to the system. */
4563 mmap_enlarge (r
, - (room
- nbytes
) / mmap_page_size
);
4565 r
->nbytes_specified
= nbytes
;
4569 /* Leave it alone. */
4571 r
->nbytes_specified
= nbytes
;
4579 /* Free a block of relocatable storage whose data is pointed to by
4580 PTR. Store 0 in *PTR to show there's no block allocated. */
4590 mmap_free_1 (MMAP_REGION (*var
));
4596 /* Perform necessary intializations for the use of mmap. */
4602 /* The value of mmap_fd is initially 0 in temacs, and -1
4603 in a dumped Emacs. */
4606 /* No anonymous mmap -- we need the file descriptor. */
4607 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4609 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4611 #endif /* MAP_ANON == 0 */
4613 if (mmap_initialized_p
)
4615 mmap_initialized_p
= 1;
4621 mmap_page_size
= getpagesize ();
4624 #endif /* USE_MMAP_FOR_BUFFERS */
4628 /***********************************************************************
4629 Buffer-text Allocation
4630 ***********************************************************************/
4633 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4634 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4635 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4636 #endif /* REL_ALLOC */
4639 /* Allocate NBYTES bytes for buffer B's text buffer. */
4642 alloc_buffer_text (b
, nbytes
)
4649 #if defined USE_MMAP_FOR_BUFFERS
4650 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4651 #elif defined REL_ALLOC
4652 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4654 p
= xmalloc (nbytes
);
4663 b
->text
->beg
= (unsigned char *) p
;
4667 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4671 enlarge_buffer_text (b
, delta
)
4676 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4679 #if defined USE_MMAP_FOR_BUFFERS
4680 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4681 #elif defined REL_ALLOC
4682 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4684 p
= xrealloc (b
->text
->beg
, nbytes
);
4693 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4698 /* Free buffer B's text buffer. */
4701 free_buffer_text (b
)
4706 #if defined USE_MMAP_FOR_BUFFERS
4707 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4708 #elif defined REL_ALLOC
4709 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4711 xfree (b
->text
->beg
);
4714 BUF_BEG_ADDR (b
) = NULL
;
4720 /***********************************************************************
4722 ***********************************************************************/
4729 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4731 /* Make sure all markable slots in buffer_defaults
4732 are initialized reasonably, so mark_buffer won't choke. */
4733 reset_buffer (&buffer_defaults
);
4734 reset_buffer_local_variables (&buffer_defaults
, 1);
4735 reset_buffer (&buffer_local_symbols
);
4736 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4737 /* Prevent GC from getting confused. */
4738 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4739 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4740 BUF_INTERVALS (&buffer_defaults
) = 0;
4741 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4742 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4743 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4745 /* Set up the default values of various buffer slots. */
4746 /* Must do these before making the first buffer! */
4748 /* real setup is done in bindings.el */
4749 buffer_defaults
.mode_line_format
= build_string ("%-");
4750 buffer_defaults
.header_line_format
= Qnil
;
4751 buffer_defaults
.abbrev_mode
= Qnil
;
4752 buffer_defaults
.overwrite_mode
= Qnil
;
4753 buffer_defaults
.case_fold_search
= Qt
;
4754 buffer_defaults
.auto_fill_function
= Qnil
;
4755 buffer_defaults
.selective_display
= Qnil
;
4757 buffer_defaults
.selective_display_ellipses
= Qt
;
4759 buffer_defaults
.abbrev_table
= Qnil
;
4760 buffer_defaults
.display_table
= Qnil
;
4761 buffer_defaults
.undo_list
= Qnil
;
4762 buffer_defaults
.mark_active
= Qnil
;
4763 buffer_defaults
.file_format
= Qnil
;
4764 buffer_defaults
.overlays_before
= Qnil
;
4765 buffer_defaults
.overlays_after
= Qnil
;
4766 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
4768 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4769 buffer_defaults
.truncate_lines
= Qnil
;
4770 buffer_defaults
.ctl_arrow
= Qt
;
4771 buffer_defaults
.direction_reversed
= Qnil
;
4772 buffer_defaults
.cursor_type
= Qt
;
4773 buffer_defaults
.extra_line_spacing
= Qnil
;
4776 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4778 buffer_defaults
.enable_multibyte_characters
= Qt
;
4779 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4780 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4781 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4782 buffer_defaults
.cache_long_line_scans
= Qnil
;
4783 buffer_defaults
.file_truename
= Qnil
;
4784 XSETFASTINT (buffer_defaults
.display_count
, 0);
4785 buffer_defaults
.indicate_empty_lines
= Qnil
;
4786 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4787 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4788 buffer_defaults
.display_time
= Qnil
;
4790 /* Assign the local-flags to the slots that have default values.
4791 The local flag is a bit that is used in the buffer
4792 to say that it has its own local value for the slot.
4793 The local flag bits are in the local_var_flags slot of the buffer. */
4795 /* Nothing can work if this isn't true */
4796 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4798 /* 0 means not a lisp var, -1 means always local, else mask */
4799 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4800 XSETINT (buffer_local_flags
.filename
, -1);
4801 XSETINT (buffer_local_flags
.directory
, -1);
4802 XSETINT (buffer_local_flags
.backed_up
, -1);
4803 XSETINT (buffer_local_flags
.save_length
, -1);
4804 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
4805 XSETINT (buffer_local_flags
.read_only
, -1);
4806 XSETINT (buffer_local_flags
.major_mode
, -1);
4807 XSETINT (buffer_local_flags
.mode_name
, -1);
4808 XSETINT (buffer_local_flags
.undo_list
, -1);
4809 XSETINT (buffer_local_flags
.mark_active
, -1);
4810 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
4811 XSETINT (buffer_local_flags
.file_truename
, -1);
4812 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
4813 XSETINT (buffer_local_flags
.file_format
, -1);
4814 XSETINT (buffer_local_flags
.display_count
, -1);
4815 XSETINT (buffer_local_flags
.display_time
, -1);
4816 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
4819 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
4820 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
4821 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
4822 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
4823 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
4824 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
4826 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
4828 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
4829 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
4830 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
4831 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
4832 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
4833 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
4834 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
4836 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
4837 /* Make this one a permanent local. */
4838 buffer_permanent_local_flags
[idx
++] = 1;
4840 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
4841 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
4842 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
4843 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
4844 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
4845 /* Make this one a permanent local. */
4846 buffer_permanent_local_flags
[idx
++] = 1;
4847 XSETFASTINT (buffer_local_flags
.left_margin_width
, idx
); ++idx
;
4848 XSETFASTINT (buffer_local_flags
.right_margin_width
, idx
); ++idx
;
4849 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
4850 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
4851 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
4852 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
4853 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
4854 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
4856 /* Need more room? */
4857 if (idx
>= MAX_PER_BUFFER_VARS
)
4859 last_per_buffer_idx
= idx
;
4861 Vbuffer_alist
= Qnil
;
4865 QSFundamental
= build_string ("Fundamental");
4867 Qfundamental_mode
= intern ("fundamental-mode");
4868 buffer_defaults
.major_mode
= Qfundamental_mode
;
4870 Qmode_class
= intern ("mode-class");
4872 Qprotected_field
= intern ("protected-field");
4874 Qpermanent_local
= intern ("permanent-local");
4876 Qkill_buffer_hook
= intern ("kill-buffer-hook");
4878 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
4880 /* super-magic invisible buffer */
4881 Vbuffer_alist
= Qnil
;
4883 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4885 inhibit_modification_hooks
= 0;
4891 char buf
[MAXPATHLEN
+ 1];
4893 struct stat dotstat
, pwdstat
;
4897 #ifdef USE_MMAP_FOR_BUFFERS
4899 /* When using the ralloc implementation based on mmap(2), buffer
4900 text pointers will have been set to null in the dumped Emacs.
4904 for (b
= all_buffers
; b
; b
= b
->next
)
4905 if (b
->text
->beg
== NULL
)
4906 enlarge_buffer_text (b
, 0);
4908 #endif /* USE_MMAP_FOR_BUFFERS */
4910 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4911 if (NILP (buffer_defaults
.enable_multibyte_characters
))
4912 Fset_buffer_multibyte (Qnil
);
4914 /* If PWD is accurate, use it instead of calling getwd. This is faster
4915 when PWD is right, and may avoid a fatal error. */
4916 if ((pwd
= getenv ("PWD")) != 0
4917 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
4918 && stat (pwd
, &pwdstat
) == 0
4919 && stat (".", &dotstat
) == 0
4920 && dotstat
.st_ino
== pwdstat
.st_ino
4921 && dotstat
.st_dev
== pwdstat
.st_dev
4922 && strlen (pwd
) < MAXPATHLEN
)
4925 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
4926 fatal ("`getcwd' failed: %s\n", strerror (errno
));
4928 else if (getwd (buf
) == 0)
4929 fatal ("`getwd' failed: %s\n", buf
);
4933 /* Maybe this should really use some standard subroutine
4934 whose definition is filename syntax dependent. */
4936 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
4938 buf
[rc
] = DIRECTORY_SEP
;
4941 #endif /* not VMS */
4943 current_buffer
->directory
= build_string (buf
);
4945 /* Add /: to the front of the name
4946 if it would otherwise be treated as magic. */
4947 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
4949 /* If the default dir is just /, TEMP is non-nil
4950 because of the ange-ftp completion handler.
4951 However, it is not necessary to turn / into /:/.
4952 So avoid doing that. */
4953 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
4954 current_buffer
->directory
4955 = concat2 (build_string ("/:"), current_buffer
->directory
);
4957 temp
= get_minibuffer (0);
4958 XBUFFER (temp
)->directory
= current_buffer
->directory
;
4961 /* initialize the buffer routines */
4965 staticpro (&last_overlay_modification_hooks
);
4966 last_overlay_modification_hooks
4967 = Fmake_vector (make_number (10), Qnil
);
4969 staticpro (&Vbuffer_defaults
);
4970 staticpro (&Vbuffer_local_symbols
);
4971 staticpro (&Qfundamental_mode
);
4972 staticpro (&Qmode_class
);
4973 staticpro (&QSFundamental
);
4974 staticpro (&Vbuffer_alist
);
4975 staticpro (&Qprotected_field
);
4976 staticpro (&Qpermanent_local
);
4977 staticpro (&Qkill_buffer_hook
);
4978 Qoverlayp
= intern ("overlayp");
4979 staticpro (&Qoverlayp
);
4980 Qevaporate
= intern ("evaporate");
4981 staticpro (&Qevaporate
);
4982 Qmodification_hooks
= intern ("modification-hooks");
4983 staticpro (&Qmodification_hooks
);
4984 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
4985 staticpro (&Qinsert_in_front_hooks
);
4986 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
4987 staticpro (&Qinsert_behind_hooks
);
4988 Qget_file_buffer
= intern ("get-file-buffer");
4989 staticpro (&Qget_file_buffer
);
4990 Qpriority
= intern ("priority");
4991 staticpro (&Qpriority
);
4992 Qwindow
= intern ("window");
4993 staticpro (&Qwindow
);
4994 Qbefore_string
= intern ("before-string");
4995 staticpro (&Qbefore_string
);
4996 Qafter_string
= intern ("after-string");
4997 staticpro (&Qafter_string
);
4998 Qfirst_change_hook
= intern ("first-change-hook");
4999 staticpro (&Qfirst_change_hook
);
5000 Qbefore_change_functions
= intern ("before-change-functions");
5001 staticpro (&Qbefore_change_functions
);
5002 Qafter_change_functions
= intern ("after-change-functions");
5003 staticpro (&Qafter_change_functions
);
5005 Fput (Qprotected_field
, Qerror_conditions
,
5006 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5007 Fput (Qprotected_field
, Qerror_message
,
5008 build_string ("Attempt to modify a protected field"));
5010 /* All these use DEFVAR_LISP_NOPRO because the slots in
5011 buffer_defaults will all be marked via Vbuffer_defaults. */
5013 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5014 &buffer_defaults
.mode_line_format
,
5015 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5016 This is the same as (default-value 'mode-line-format). */);
5018 DEFVAR_LISP_NOPRO ("default-header-line-format",
5019 &buffer_defaults
.header_line_format
,
5020 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5021 This is the same as (default-value 'header-line-format). */);
5023 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5024 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5025 This is the same as (default-value 'cursor-type). */);
5027 DEFVAR_LISP_NOPRO ("default-line-spacing",
5028 &buffer_defaults
.extra_line_spacing
,
5029 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5030 This is the same as (default-value 'line-spacing). */);
5032 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5033 &buffer_defaults
.abbrev_mode
,
5034 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5035 This is the same as (default-value 'abbrev-mode). */);
5037 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5038 &buffer_defaults
.ctl_arrow
,
5039 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5040 This is the same as (default-value 'ctl-arrow). */);
5042 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5043 &buffer_defaults
.direction_reversed
,
5044 doc
: /* Default value of `direction_reversed' for buffers that do not override it.
5045 This is the same as (default-value 'direction-reversed). */);
5047 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5048 &buffer_defaults
.enable_multibyte_characters
,
5049 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5050 This is the same as (default-value 'enable-multibyte-characters). */);
5052 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5053 &buffer_defaults
.buffer_file_coding_system
,
5054 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5055 This is the same as (default-value 'buffer-file-coding-system). */);
5057 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5058 &buffer_defaults
.truncate_lines
,
5059 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5060 This is the same as (default-value 'truncate-lines). */);
5062 DEFVAR_LISP_NOPRO ("default-fill-column",
5063 &buffer_defaults
.fill_column
,
5064 doc
: /* Default value of `fill-column' for buffers that do not override it.
5065 This is the same as (default-value 'fill-column). */);
5067 DEFVAR_LISP_NOPRO ("default-left-margin",
5068 &buffer_defaults
.left_margin
,
5069 doc
: /* Default value of `left-margin' for buffers that do not override it.
5070 This is the same as (default-value 'left-margin). */);
5072 DEFVAR_LISP_NOPRO ("default-tab-width",
5073 &buffer_defaults
.tab_width
,
5074 doc
: /* Default value of `tab-width' for buffers that do not override it.
5075 This is the same as (default-value 'tab-width). */);
5077 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5078 &buffer_defaults
.case_fold_search
,
5079 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5080 This is the same as (default-value 'case-fold-search). */);
5083 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5084 &buffer_defaults
.buffer_file_type
,
5085 doc
: /* Default file type for buffers that do not override it.
5086 This is the same as (default-value 'buffer-file-type).
5087 The file type is nil for text, t for binary. */);
5090 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5091 &buffer_defaults
.left_margin_width
,
5092 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5093 This is the same as (default-value 'left-margin-width). */);
5095 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5096 &buffer_defaults
.right_margin_width
,
5097 doc
: /* Default value of `right_margin_width' for buffers that don't override it.
5098 This is the same as (default-value 'right-margin-width). */);
5100 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5101 &buffer_defaults
.indicate_empty_lines
,
5102 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5103 This is the same as (default-value 'indicate-empty-lines). */);
5105 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5106 &buffer_defaults
.scroll_up_aggressively
,
5107 doc
: /* Default value of `scroll-up-aggressively' for buffers that
5108 don't override it. This is the same as (default-value
5109 'scroll-up-aggressively). */);
5111 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5112 &buffer_defaults
.scroll_down_aggressively
,
5113 doc
: /* Default value of `scroll-down-aggressively' for buffers that
5114 don't override it. This is the same as (default-value
5115 'scroll-down-aggressively). */);
5117 DEFVAR_PER_BUFFER ("header-line-format",
5118 ¤t_buffer
->header_line_format
,
5120 doc
: /* Analogous to `mode-line-format', but for the mode line that can be
5121 displayed at the top of a window. */);
5123 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5125 doc
: /* Template for displaying mode line for current buffer.
5126 Each buffer has its own value of this variable.
5127 Value may be nil, a string, a symbol or a list or cons cell.
5128 A value of nil means don't display a mode line.
5129 For a symbol, its value is used (but it is ignored if t or nil).
5130 A string appearing directly as the value of a symbol is processed verbatim
5131 in that the %-constructs below are not recognized.
5132 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5133 is used as a mode line element.
5134 For a list whose car is a symbol, the symbol's value is taken,
5135 and if that is non-nil, the cadr of the list is processed recursively.
5136 Otherwise, the caddr of the list (if there is one) is processed.
5137 For a list whose car is a string or list, each element is processed
5138 recursively and the results are effectively concatenated.
5139 For a list whose car is an integer, the cdr of the list is processed
5140 and padded (if the number is positive) or truncated (if negative)
5141 to the width specified by that number.
5142 A string is printed verbatim in the mode line except for %-constructs:
5143 (%-constructs are allowed when the string is the entire mode-line-format
5144 or when it is found in a cons-cell or a list)
5145 %b -- print buffer name. %f -- print visited file name.
5146 %F -- print frame name.
5147 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5148 %& is like %*, but ignore read-only-ness.
5149 % means buffer is read-only and * means it is modified.
5150 For a modified read-only buffer, %* gives % and %+ gives *.
5151 %s -- print process status. %l -- print the current line number.
5152 %c -- print the current column number (this makes editing slower).
5153 To make the column number update correctly in all cases,
5154 `column-number-mode' must be non-nil.
5155 %p -- print percent of buffer above top of window, or Top, Bot or All.
5156 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5157 or print Bottom or All.
5158 %m -- print the mode name.
5159 %n -- print Narrow if appropriate.
5160 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5161 %Z -- like %z, but including the end-of-line format.
5162 %[ -- print one [ for each recursive editing level. %] similar.
5163 %% -- print %. %- -- print infinitely many dashes.
5164 Decimal digits after the % specify field width to which to pad. */);
5166 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5167 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5168 nil here means use current buffer's major mode. */);
5170 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5171 make_number (Lisp_Symbol
),
5172 doc
: /* Symbol for current buffer's major mode. */);
5174 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5175 make_number (Lisp_String
),
5176 doc
: /* Pretty name of current buffer's major mode (a string). */);
5178 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5179 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5181 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5183 doc
: /* *Non-nil if searches and matches should ignore case. */);
5185 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5186 make_number (Lisp_Int
),
5187 doc
: /* *Column beyond which automatic line-wrapping should happen. */);
5189 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5190 make_number (Lisp_Int
),
5191 doc
: /* *Column for the default indent-line-function to indent to.
5192 Linefeed indents to this column in Fundamental mode. */);
5194 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5195 make_number (Lisp_Int
),
5196 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5198 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5199 doc
: /* *Non-nil means display control chars with uparrow.
5200 A value of nil means use backslash and octal digits.
5201 This variable does not apply to characters whose display is specified
5202 in the current display table (if there is one). */);
5204 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5205 ¤t_buffer
->enable_multibyte_characters
,
5207 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5208 Otherwise they are regarded as unibyte. This affects the display,
5209 file I/O and the behavior of various editing commands.
5211 This variable is buffer-local but you cannot set it directly;
5212 use the function `set-buffer-multibyte' to change a buffer's representation.
5213 Changing its default value with `setq-default' is supported.
5214 See also variable `default-enable-multibyte-characters' and Info node
5215 `(elisp)Text Representations'. */);
5217 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5218 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5219 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5220 This variable applies to saving the buffer, and also to `write-region'
5221 and other functions that use `write-region'.
5222 It does not apply to sending output to subprocesses, however.
5224 If this is nil, the buffer is saved without any code conversion
5225 unless some coding system is specified in `file-coding-system-alist'
5226 for the buffer file.
5228 The variable `coding-system-for-write', if non-nil, overrides this variable.
5230 This variable is never applied to a way of decoding a file while reading it. */);
5232 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5234 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5236 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5237 doc
: /* *Non-nil means do not display continuation lines;
5238 give each line of text one screen line.
5240 Note that this is overridden by the variable
5241 `truncate-partial-width-windows' if that variable is non-nil
5242 and this buffer is not full-frame width. */);
5245 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5247 doc
: /* Non-nil if the visited file is a binary file.
5248 This variable is meaningful on MS-DOG and Windows NT.
5249 On those systems, it is automatically local in every buffer.
5250 On other systems, this variable is normally always nil. */);
5253 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5254 make_number (Lisp_String
),
5255 doc
: /* Name of default directory of current buffer. Should end with slash.
5256 To interactively change the default directory, use command `cd'. */);
5258 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5260 doc
: /* Function called (if non-nil) to perform auto-fill.
5261 It is called after self-inserting any character specified in
5262 the `auto-fill-chars' table.
5263 NOTE: This variable is not a hook;
5264 its value may not be a list of functions. */);
5266 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5267 make_number (Lisp_String
),
5268 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5270 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5271 make_number (Lisp_String
),
5272 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5273 The truename of a file is calculated by `file-truename'
5274 and then abbreviated with `abbreviate-file-name'. */);
5276 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5277 ¤t_buffer
->auto_save_file_name
,
5278 make_number (Lisp_String
),
5279 doc
: /* Name of file for auto-saving current buffer,
5280 or nil if buffer should not be auto-saved. */);
5282 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5283 doc
: /* Non-nil if this buffer is read-only. */);
5285 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5286 doc
: /* Non-nil if this buffer's file has been backed up.
5287 Backing up is done before the first time the file is saved. */);
5289 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5290 make_number (Lisp_Int
),
5291 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5294 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5296 doc
: /* Non-nil enables selective display:
5297 Integer N as value means display only lines
5298 that start with less than n columns of space.
5299 A value of t means, after a ^M, all the rest of the line is invisible.
5300 Then ^M's in the file are written into files as newlines. */);
5303 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5304 ¤t_buffer
->selective_display_ellipses
,
5306 doc
: /* t means display ... on previous line when a line is invisible. */);
5309 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5310 doc
: /* Non-nil if self-insertion should replace existing text.
5311 The value should be one of `overwrite-mode-textual',
5312 `overwrite-mode-binary', or nil.
5313 If it is `overwrite-mode-textual', self-insertion still
5314 inserts at the end of a line, and inserts when point is before a tab,
5315 until the tab is filled in.
5316 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5318 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5320 doc
: /* Display table that controls display of the contents of current buffer.
5322 If this variable is nil, the value of `standard-display-table' is used.
5323 Each window can have its own, overriding display table, see
5324 `set-window-display-table' and `window-display-table'.
5326 The display table is a char-table created with `make-display-table'.
5327 A char-table is an array indexed by character codes. Normal array
5328 primitives `aref' and `aset' can be used to access elements of a char-table.
5330 Each of the char-table elements control how to display the corresponding
5331 text character: the element at index C in the table says how to display
5332 the character whose code is C. Each element should be a vector of
5333 characters or nil. nil means display the character in the default fashion;
5334 otherwise, the characters from the vector are delivered to the screen
5335 instead of the original character.
5337 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5338 a capital Y instead of each X character.
5340 In addition, a char-table has six extra slots to control the display of:
5342 the end of a truncated screen line (extra-slot 0, a single character);
5343 the end of a continued line (extra-slot 1, a single character);
5344 the escape character used to display character codes in octal
5345 (extra-slot 2, a single character);
5346 the character used as an arrow for control characters (extra-slot 3,
5347 a single character);
5348 the decoration indicating the presence of invisible lines (extra-slot 4,
5349 a vector of characters);
5350 the character used to draw the border between side-by-side windows
5351 (extra-slot 5, a single character).
5353 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5355 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_width
,
5357 doc
: /* *Width of left marginal area for display of a buffer.
5358 A value of nil means no marginal area. */);
5360 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_width
,
5362 doc
: /* *Width of right marginal area for display of a buffer.
5363 A value of nil means no marginal area. */);
5365 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5366 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5367 doc
: /* *Visually indicate empty lines after the buffer end.
5368 If non-nil, a bitmap is displayed in the left fringe of a window on
5369 window-systems. */);
5371 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5372 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5373 doc
: /* *If a number, scroll display up aggressively.
5374 If scrolling a window because point is above the window start, choose
5375 a new window start so that point ends up that fraction of the window's
5376 height from the top of the window. */);
5378 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5379 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5380 doc
: /* *If a number, scroll display down aggressively.
5381 If scrolling a window because point is below the window end, choose
5382 a new window start so that point ends up that fraction of the window's
5383 height from the bottom of the window. */);
5385 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5389 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5390 doc
: /* List of functions to call before each text change.
5391 Two arguments are passed to each function: the positions of
5392 the beginning and end of the range of old text to be changed.
5393 \(For an insertion, the beginning and end are at the same place.)
5394 No information is given about the length of the text after the change.
5396 Buffer changes made while executing the `before-change-functions'
5397 don't call any before-change or after-change functions.
5398 That's because these variables are temporarily set to nil.
5399 As a result, a hook function cannot straightforwardly alter the value of
5400 these variables. See the Emacs Lisp manual for a way of
5401 accomplishing an equivalent result by using other variables.
5403 If an unhandled error happens in running these functions,
5404 the variable's value remains nil. That prevents the error
5405 from happening repeatedly and making Emacs nonfunctional. */);
5406 Vbefore_change_functions
= Qnil
;
5408 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5409 doc
: /* List of function to call after each text change.
5410 Three arguments are passed to each function: the positions of
5411 the beginning and end of the range of changed text,
5412 and the length in bytes of the pre-change text replaced by that range.
5413 \(For an insertion, the pre-change length is zero;
5414 for a deletion, that length is the number of bytes deleted,
5415 and the post-change beginning and end are at the same place.)
5417 Buffer changes made while executing the `after-change-functions'
5418 don't call any before-change or after-change functions.
5419 That's because these variables are temporarily set to nil.
5420 As a result, a hook function cannot straightforwardly alter the value of
5421 these variables. See the Emacs Lisp manual for a way of
5422 accomplishing an equivalent result by using other variables.
5424 If an unhandled error happens in running these functions,
5425 the variable's value remains nil. That prevents the error
5426 from happening repeatedly and making Emacs nonfunctional. */);
5427 Vafter_change_functions
= Qnil
;
5429 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5430 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5431 The functions are run using the `run-hooks' function. */);
5432 Vfirst_change_hook
= Qnil
;
5434 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5435 doc
: /* List of undo entries in current buffer.
5436 Recent changes come first; older changes follow newer.
5438 An entry (BEG . END) represents an insertion which begins at
5439 position BEG and ends at position END.
5441 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5442 from (abs POSITION). If POSITION is positive, point was at the front
5443 of the text being deleted; if negative, point was at the end.
5445 An entry (t HIGH . LOW) indicates that the buffer previously had
5446 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5447 of the visited file's modification time, as of that time. If the
5448 modification time of the most recent save is different, this entry is
5451 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5452 was modified between BEG and END. PROPERTY is the property name,
5453 and VALUE is the old value.
5455 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5456 was adjusted in position by the offset DISTANCE (an integer).
5458 An entry of the form POSITION indicates that point was at the buffer
5459 location given by the integer. Undoing an entry of this form places
5462 nil marks undo boundaries. The undo command treats the changes
5463 between two undo boundaries as a single step to be undone.
5465 If the value of the variable is t, undo information is not recorded. */);
5467 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5468 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5470 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5471 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5473 Normally, the line-motion functions work by scanning the buffer for
5474 newlines. Columnar operations (like move-to-column and
5475 compute-motion) also work by scanning the buffer, summing character
5476 widths as they go. This works well for ordinary text, but if the
5477 buffer's lines are very long (say, more than 500 characters), these
5478 motion functions will take longer to execute. Emacs may also take
5479 longer to update the display.
5481 If cache-long-line-scans is non-nil, these motion functions cache the
5482 results of their scans, and consult the cache to avoid rescanning
5483 regions of the buffer until the text is modified. The caches are most
5484 beneficial when they prevent the most searching---that is, when the
5485 buffer contains long lines and large regions of characters with the
5486 same, fixed screen width.
5488 When cache-long-line-scans is non-nil, processing short lines will
5489 become slightly slower (because of the overhead of consulting the
5490 cache), and the caches will use memory roughly proportional to the
5491 number of newlines and characters whose screen width varies.
5493 The caches require no explicit maintenance; their accuracy is
5494 maintained internally by the Emacs primitives. Enabling or disabling
5495 the cache should not affect the behavior of any of the motion
5496 functions; it should only affect their performance. */);
5498 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5499 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5501 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5502 doc
: /* List of formats to use when saving this buffer.
5503 Formats are defined by `format-alist'. This variable is
5504 set when a file is visited. Automatically local in all buffers. */);
5506 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5507 ¤t_buffer
->invisibility_spec
, Qnil
,
5508 doc
: /* Invisibility spec of this buffer.
5509 The default is t, which means that text is invisible
5510 if it has a non-nil `invisible' property.
5511 If the value is a list, a text character is invisible if its `invisible'
5512 property is an element in that list.
5513 If an element is a cons cell of the form (PROP . ELLIPSIS),
5514 then characters with property value PROP are invisible,
5515 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5517 DEFVAR_PER_BUFFER ("buffer-display-count",
5518 ¤t_buffer
->display_count
, Qnil
,
5519 doc
: /* A number incremented each time this buffer is displayed in a window.
5520 The function `set-window-buffer' increments it. */);
5522 DEFVAR_PER_BUFFER ("buffer-display-time",
5523 ¤t_buffer
->display_time
, Qnil
,
5524 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5525 The function `set-window-buffer' updates this variable
5526 to the value obtained by calling `current-time'.
5527 If the buffer has never been shown in a window, the value is nil. */);
5529 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5530 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5531 Non-nil also enables highlighting of the region whenever the mark is active.
5532 The variable `highlight-nonselected-windows' controls whether to highlight
5533 all windows or just the selected window. */);
5534 Vtransient_mark_mode
= Qnil
;
5536 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5537 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5538 If the value is t, disregard `buffer-read-only' and all `read-only'
5539 text properties. If the value is a list, disregard `buffer-read-only'
5540 and disregard a `read-only' text property if the property value
5541 is a member of the list. */);
5542 Vinhibit_read_only
= Qnil
;
5544 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5545 doc
: /* Cursor to use in window displaying this buffer.
5546 Values are interpreted as follows:
5548 t use the cursor specified for the frame
5549 nil don't display a cursor
5550 `bar' display a bar cursor with default width
5551 (bar . WIDTH) display a bar cursor with width WIDTH
5552 others display a box cursor. */);
5554 DEFVAR_PER_BUFFER ("line-spacing",
5555 ¤t_buffer
->extra_line_spacing
, Qnil
,
5556 doc
: /* Additional space to put between lines when displaying a buffer.
5557 The space is measured in pixels, and put below lines on window systems. */);
5559 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5560 doc
: /* List of functions called with no args to query before killing a buffer. */);
5561 Vkill_buffer_query_functions
= Qnil
;
5563 defsubr (&Sbuffer_live_p
);
5564 defsubr (&Sbuffer_list
);
5565 defsubr (&Sget_buffer
);
5566 defsubr (&Sget_file_buffer
);
5567 defsubr (&Sget_buffer_create
);
5568 defsubr (&Smake_indirect_buffer
);
5569 defsubr (&Sgenerate_new_buffer_name
);
5570 defsubr (&Sbuffer_name
);
5571 /*defsubr (&Sbuffer_number);*/
5572 defsubr (&Sbuffer_file_name
);
5573 defsubr (&Sbuffer_base_buffer
);
5574 defsubr (&Sbuffer_local_variables
);
5575 defsubr (&Sbuffer_modified_p
);
5576 defsubr (&Sset_buffer_modified_p
);
5577 defsubr (&Sbuffer_modified_tick
);
5578 defsubr (&Srename_buffer
);
5579 defsubr (&Sother_buffer
);
5580 defsubr (&Sbuffer_disable_undo
);
5581 defsubr (&Sbuffer_enable_undo
);
5582 defsubr (&Skill_buffer
);
5583 defsubr (&Sset_buffer_major_mode
);
5584 defsubr (&Sswitch_to_buffer
);
5585 defsubr (&Spop_to_buffer
);
5586 defsubr (&Scurrent_buffer
);
5587 defsubr (&Sset_buffer
);
5588 defsubr (&Sbarf_if_buffer_read_only
);
5589 defsubr (&Sbury_buffer
);
5590 defsubr (&Serase_buffer
);
5591 defsubr (&Sset_buffer_multibyte
);
5592 defsubr (&Skill_all_local_variables
);
5594 defsubr (&Soverlayp
);
5595 defsubr (&Smake_overlay
);
5596 defsubr (&Sdelete_overlay
);
5597 defsubr (&Smove_overlay
);
5598 defsubr (&Soverlay_start
);
5599 defsubr (&Soverlay_end
);
5600 defsubr (&Soverlay_buffer
);
5601 defsubr (&Soverlay_properties
);
5602 defsubr (&Soverlays_at
);
5603 defsubr (&Soverlays_in
);
5604 defsubr (&Snext_overlay_change
);
5605 defsubr (&Sprevious_overlay_change
);
5606 defsubr (&Soverlay_recenter
);
5607 defsubr (&Soverlay_lists
);
5608 defsubr (&Soverlay_get
);
5609 defsubr (&Soverlay_put
);
5610 defsubr (&Srestore_buffer_modified_p
);
5616 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
5617 initial_define_key (control_x_map
, 'k', "kill-buffer");
5619 /* This must not be in syms_of_buffer, because Qdisabled is not
5620 initialized when that function gets called. */
5621 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);