1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994,
3 1995, 1997, 1998, 1999, 2000, 2001, 2002,
4 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
25 #include <sys/types.h>
27 #include <sys/param.h>
41 #include "intervals.h"
45 #include "character.h"
46 #include "region-cache.h"
48 #include "blockinput.h"
53 struct buffer
*current_buffer
; /* the current buffer */
55 /* First buffer in chain of all buffers (in reverse order of creation).
56 Threaded through ->next. */
58 struct buffer
*all_buffers
;
60 /* This structure holds the default values of the buffer-local variables
61 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
62 The default value occupies the same slot in this structure
63 as an individual buffer's value occupies in that buffer.
64 Setting the default value also goes through the alist of buffers
65 and stores into each buffer that does not say it has a local value. */
67 DECL_ALIGN (struct buffer
, buffer_defaults
);
69 /* A Lisp_Object pointer to the above, used for staticpro */
71 static Lisp_Object Vbuffer_defaults
;
73 /* This structure marks which slots in a buffer have corresponding
74 default values in buffer_defaults.
75 Each such slot has a nonzero value in this structure.
76 The value has only one nonzero bit.
78 When a buffer has its own local value for a slot,
79 the entry for that slot (found in the same slot in this structure)
80 is turned on in the buffer's local_flags array.
82 If a slot in this structure is -1, then even though there may
83 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
84 and the corresponding slot in buffer_defaults is not used.
86 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
87 but there is a default value which is copied into each buffer.
89 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
90 zero, that is a bug */
92 struct buffer buffer_local_flags
;
94 /* This structure holds the names of symbols whose values may be
95 buffer-local. It is indexed and accessed in the same way as the above. */
97 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
99 /* A Lisp_Object pointer to the above, used for staticpro */
100 static Lisp_Object Vbuffer_local_symbols
;
102 /* This structure holds the required types for the values in the
103 buffer-local slots. If a slot contains Qnil, then the
104 corresponding buffer slot may contain a value of any type. If a
105 slot contains an integer, then prospective values' tags must be
106 equal to that integer (except nil is always allowed).
107 When a tag does not match, the function
108 buffer_slot_type_mismatch will signal an error.
110 If a slot here contains -1, the corresponding variable is read-only. */
111 struct buffer buffer_local_types
;
113 /* Flags indicating which built-in buffer-local variables
114 are permanent locals. */
115 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
117 /* Number of per-buffer variables used. */
119 int last_per_buffer_idx
;
121 Lisp_Object
Fset_buffer ();
122 void set_buffer_internal ();
123 void set_buffer_internal_1 ();
124 static void call_overlay_mod_hooks ();
125 static void swap_out_buffer_local_variables ();
126 static void reset_buffer_local_variables ();
128 /* Alist of all buffer names vs the buffers. */
129 /* This used to be a variable, but is no longer,
130 to prevent lossage due to user rplac'ing this alist or its elements. */
131 Lisp_Object Vbuffer_alist
;
133 /* Functions to call before and after each text change. */
134 Lisp_Object Vbefore_change_functions
;
135 Lisp_Object Vafter_change_functions
;
137 Lisp_Object Vtransient_mark_mode
;
139 /* t means ignore all read-only text properties.
140 A list means ignore such a property if its value is a member of the list.
141 Any non-nil value means ignore buffer-read-only. */
142 Lisp_Object Vinhibit_read_only
;
144 /* List of functions to call that can query about killing a buffer.
145 If any of these functions returns nil, we don't kill it. */
146 Lisp_Object Vkill_buffer_query_functions
;
147 Lisp_Object Qkill_buffer_query_functions
;
149 /* Hook run before changing a major mode. */
150 Lisp_Object Vchange_major_mode_hook
, Qchange_major_mode_hook
;
152 /* List of functions to call before changing an unmodified buffer. */
153 Lisp_Object Vfirst_change_hook
;
155 Lisp_Object Qfirst_change_hook
;
156 Lisp_Object Qbefore_change_functions
;
157 Lisp_Object Qafter_change_functions
;
158 Lisp_Object Qucs_set_table_for_input
;
160 /* If nonzero, all modification hooks are suppressed. */
161 int inhibit_modification_hooks
;
163 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
165 Lisp_Object Qprotected_field
;
167 Lisp_Object QSFundamental
; /* A string "Fundamental" */
169 Lisp_Object Qkill_buffer_hook
;
171 Lisp_Object Qget_file_buffer
;
173 Lisp_Object Qoverlayp
;
175 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
177 Lisp_Object Qmodification_hooks
;
178 Lisp_Object Qinsert_in_front_hooks
;
179 Lisp_Object Qinsert_behind_hooks
;
181 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
182 static void free_buffer_text
P_ ((struct buffer
*b
));
183 static struct Lisp_Overlay
* copy_overlays
P_ ((struct buffer
*, struct Lisp_Overlay
*));
184 static void modify_overlay
P_ ((struct buffer
*, EMACS_INT
, EMACS_INT
));
185 static Lisp_Object buffer_lisp_local_variables
P_ ((struct buffer
*));
187 extern char * emacs_strerror
P_ ((int));
189 /* For debugging; temporary. See set_buffer_internal. */
190 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
197 error ("No buffer named %s", SDATA (spec
));
198 error ("Invalid buffer argument");
201 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
202 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
203 Value is nil if OBJECT is not a buffer or if it has been killed. */)
207 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
211 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
212 doc
: /* Return a list of all existing live buffers.
213 If the optional arg FRAME is a frame, we return the buffer list
214 in the proper order for that frame: the buffers in FRAME's `buffer-list'
215 frame parameter come first, followed by the rest of the buffers. */)
220 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
224 Lisp_Object framelist
, prevlist
, tail
;
229 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
230 prevlist
= Fnreverse (Fcopy_sequence (XFRAME (frame
)->buried_buffer_list
));
232 /* Remove from GENERAL any buffer that duplicates one in
233 FRAMELIST or PREVLIST. */
237 general
= Fdelq (XCAR (tail
), general
);
243 general
= Fdelq (XCAR (tail
), general
);
250 return Fnconc (3, args
);
256 /* Like Fassoc, but use Fstring_equal to compare
257 (which ignores text properties),
258 and don't ever QUIT. */
261 assoc_ignore_text_properties (key
, list
)
262 register Lisp_Object key
;
265 register Lisp_Object tail
;
266 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
268 register Lisp_Object elt
, tem
;
270 tem
= Fstring_equal (Fcar (elt
), key
);
277 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
278 doc
: /* Return the buffer named NAME (a string).
279 If there is no live buffer named NAME, return nil.
280 NAME may also be a buffer; if so, the value is that buffer. */)
282 register Lisp_Object name
;
288 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
291 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
292 doc
: /* Return the buffer visiting file FILENAME (a string).
293 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
294 If there is no such live buffer, return nil.
295 See also `find-buffer-visiting'. */)
297 register Lisp_Object filename
;
299 register Lisp_Object tail
, buf
, tem
;
302 CHECK_STRING (filename
);
303 filename
= Fexpand_file_name (filename
, Qnil
);
305 /* If the file name has special constructs in it,
306 call the corresponding file handler. */
307 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
309 return call2 (handler
, Qget_file_buffer
, filename
);
311 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
313 buf
= Fcdr (XCAR (tail
));
314 if (!BUFFERP (buf
)) continue;
315 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
316 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
324 get_truename_buffer (filename
)
325 register Lisp_Object filename
;
327 register Lisp_Object tail
, buf
, tem
;
329 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
331 buf
= Fcdr (XCAR (tail
));
332 if (!BUFFERP (buf
)) continue;
333 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
334 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
341 /* Incremented for each buffer created, to assign the buffer number. */
344 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
345 doc
: /* Return the buffer named NAME, or create such a buffer and return it.
346 A new buffer is created if there is no live buffer named NAME.
347 If NAME starts with a space, the new buffer does not keep undo information.
348 If NAME is a buffer instead of a string, then it is the value returned.
349 The value is never nil. */)
351 register Lisp_Object name
;
353 register Lisp_Object buf
;
354 register struct buffer
*b
;
356 buf
= Fget_buffer (name
);
360 if (SCHARS (name
) == 0)
361 error ("Empty string for buffer name is not allowed");
363 b
= (struct buffer
*) allocate_buffer ();
365 /* An ordinary buffer uses its own struct buffer_text. */
366 b
->text
= &b
->own_text
;
369 BUF_GAP_SIZE (b
) = 20;
371 /* We allocate extra 1-byte at the tail and keep it always '\0' for
372 anchoring a search. */
373 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
375 if (! BUF_BEG_ADDR (b
))
376 buffer_memory_full ();
383 BUF_PT_BYTE (b
) = BEG_BYTE
;
384 BUF_GPT_BYTE (b
) = BEG_BYTE
;
385 BUF_BEGV_BYTE (b
) = BEG_BYTE
;
386 BUF_ZV_BYTE (b
) = BEG_BYTE
;
387 BUF_Z_BYTE (b
) = BEG_BYTE
;
389 BUF_CHARS_MODIFF (b
) = 1;
390 BUF_OVERLAY_MODIFF (b
) = 1;
391 BUF_SAVE_MODIFF (b
) = 1;
392 BUF_INTERVALS (b
) = 0;
393 BUF_UNCHANGED_MODIFIED (b
) = 1;
394 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
395 BUF_END_UNCHANGED (b
) = 0;
396 BUF_BEG_UNCHANGED (b
) = 0;
397 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
399 b
->newline_cache
= 0;
400 b
->width_run_cache
= 0;
401 b
->width_table
= Qnil
;
402 b
->prevent_redisplay_optimizations_p
= 1;
404 /* Put this on the chain of all buffers including killed ones. */
405 b
->next
= all_buffers
;
408 /* An ordinary buffer normally doesn't need markers
409 to handle BEGV and ZV. */
411 b
->begv_marker
= Qnil
;
414 name
= Fcopy_sequence (name
);
415 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
418 b
->undo_list
= (SREF (name
, 0) != ' ') ? Qnil
: Qt
;
421 reset_buffer_local_variables (b
, 1);
423 b
->mark
= Fmake_marker ();
424 BUF_MARKERS (b
) = NULL
;
427 /* Put this in the alist of all live buffers. */
429 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
431 /* An error in calling the function here (should someone redefine it)
432 can lead to infinite regress until you run out of stack. rms
433 says that's not worth protecting against. */
434 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
435 /* buf is on buffer-alist, so no gcpro. */
436 call1 (Qucs_set_table_for_input
, buf
);
442 /* Return a list of overlays which is a copy of the overlay list
443 LIST, but for buffer B. */
445 static struct Lisp_Overlay
*
446 copy_overlays (b
, list
)
448 struct Lisp_Overlay
*list
;
451 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
453 XSETBUFFER (buffer
, b
);
455 for (; list
; list
= list
->next
)
457 Lisp_Object overlay
, start
, end
, old_overlay
;
460 XSETMISC (old_overlay
, list
);
461 charpos
= marker_position (OVERLAY_START (old_overlay
));
462 start
= Fmake_marker ();
463 Fset_marker (start
, make_number (charpos
), buffer
);
464 XMARKER (start
)->insertion_type
465 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
467 charpos
= marker_position (OVERLAY_END (old_overlay
));
468 end
= Fmake_marker ();
469 Fset_marker (end
, make_number (charpos
), buffer
);
470 XMARKER (end
)->insertion_type
471 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
473 overlay
= allocate_misc ();
474 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
475 OVERLAY_START (overlay
) = start
;
476 OVERLAY_END (overlay
) = end
;
477 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
478 XOVERLAY (overlay
)->next
= NULL
;
481 tail
= tail
->next
= XOVERLAY (overlay
);
483 result
= tail
= XOVERLAY (overlay
);
490 /* Clone per-buffer values of buffer FROM.
492 Buffer TO gets the same per-buffer values as FROM, with the
493 following exceptions: (1) TO's name is left untouched, (2) markers
494 are copied and made to refer to TO, and (3) overlay lists are
498 clone_per_buffer_values (from
, to
)
499 struct buffer
*from
, *to
;
501 Lisp_Object to_buffer
;
504 XSETBUFFER (to_buffer
, to
);
506 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
508 offset
+= sizeof (Lisp_Object
))
512 obj
= PER_BUFFER_VALUE (from
, offset
);
515 struct Lisp_Marker
*m
= XMARKER (obj
);
516 obj
= Fmake_marker ();
517 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
518 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
521 PER_BUFFER_VALUE (to
, offset
) = obj
;
524 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
526 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
527 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
529 /* Get (a copy of) the alist of Lisp-level local variables of FROM
530 and install that in TO. */
531 to
->local_var_alist
= buffer_lisp_local_variables (from
);
534 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
536 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
537 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
538 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
539 NAME should be a string which is not the name of an existing buffer.
540 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
541 such as major and minor modes, in the indirect buffer.
542 CLONE nil means the indirect buffer's state is reset to default values. */)
543 (base_buffer
, name
, clone
)
544 Lisp_Object base_buffer
, name
, clone
;
546 Lisp_Object buf
, tem
;
550 buf
= Fget_buffer (name
);
552 error ("Buffer name `%s' is in use", SDATA (name
));
555 base_buffer
= Fget_buffer (base_buffer
);
556 if (NILP (base_buffer
))
557 error ("No such buffer: `%s'", SDATA (tem
));
558 if (NILP (XBUFFER (base_buffer
)->name
))
559 error ("Base buffer has been killed");
561 if (SCHARS (name
) == 0)
562 error ("Empty string for buffer name is not allowed");
564 b
= (struct buffer
*) allocate_buffer ();
566 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
567 ? XBUFFER (base_buffer
)->base_buffer
568 : XBUFFER (base_buffer
));
570 /* Use the base buffer's text object. */
571 b
->text
= b
->base_buffer
->text
;
573 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
574 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
575 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
576 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
577 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
578 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
580 b
->newline_cache
= 0;
581 b
->width_run_cache
= 0;
582 b
->width_table
= Qnil
;
584 /* Put this on the chain of all buffers including killed ones. */
585 b
->next
= all_buffers
;
588 name
= Fcopy_sequence (name
);
589 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
593 reset_buffer_local_variables (b
, 1);
595 /* Put this in the alist of all live buffers. */
597 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
599 b
->mark
= Fmake_marker ();
602 /* The multibyte status belongs to the base buffer. */
603 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
605 /* Make sure the base buffer has markers for its narrowing. */
606 if (NILP (b
->base_buffer
->pt_marker
))
608 b
->base_buffer
->pt_marker
= Fmake_marker ();
609 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
610 BUF_PT (b
->base_buffer
),
611 BUF_PT_BYTE (b
->base_buffer
));
613 if (NILP (b
->base_buffer
->begv_marker
))
615 b
->base_buffer
->begv_marker
= Fmake_marker ();
616 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
617 BUF_BEGV (b
->base_buffer
),
618 BUF_BEGV_BYTE (b
->base_buffer
));
620 if (NILP (b
->base_buffer
->zv_marker
))
622 b
->base_buffer
->zv_marker
= Fmake_marker ();
623 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
624 BUF_ZV (b
->base_buffer
),
625 BUF_ZV_BYTE (b
->base_buffer
));
626 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
631 /* Give the indirect buffer markers for its narrowing. */
632 b
->pt_marker
= Fmake_marker ();
633 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
634 b
->begv_marker
= Fmake_marker ();
635 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
636 b
->zv_marker
= Fmake_marker ();
637 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
638 XMARKER (b
->zv_marker
)->insertion_type
= 1;
642 struct buffer
*old_b
= current_buffer
;
644 clone_per_buffer_values (b
->base_buffer
, b
);
646 b
->file_truename
= Qnil
;
647 b
->display_count
= make_number (0);
649 b
->auto_save_file_name
= Qnil
;
650 set_buffer_internal_1 (b
);
651 Fset (intern ("buffer-save-without-query"), Qnil
);
652 Fset (intern ("buffer-file-number"), Qnil
);
653 Fset (intern ("buffer-stale-function"), Qnil
);
654 set_buffer_internal_1 (old_b
);
661 delete_all_overlays (b
)
666 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
667 have to empty the list, otherwise we end up with overlays that
668 think they belong to this buffer while the buffer doesn't know about
670 while (b
->overlays_before
)
672 XSETMISC (overlay
, b
->overlays_before
);
673 Fdelete_overlay (overlay
);
675 while (b
->overlays_after
)
677 XSETMISC (overlay
, b
->overlays_after
);
678 Fdelete_overlay (overlay
);
680 eassert (b
->overlays_before
== NULL
);
681 eassert (b
->overlays_after
== NULL
);
684 /* Reinitialize everything about a buffer except its name and contents
686 If called on an already-initialized buffer, the list of overlays
687 should be deleted before calling this function, otherwise we end up
688 with overlays that claim to belong to the buffer but the buffer
689 claims it doesn't belong to it. */
693 register struct buffer
*b
;
696 b
->file_truename
= Qnil
;
697 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
699 XSETFASTINT (b
->save_length
, 0);
700 b
->last_window_start
= 1;
701 /* It is more conservative to start out "changed" than "unchanged". */
703 b
->prevent_redisplay_optimizations_p
= 1;
705 b
->auto_save_modified
= 0;
706 b
->auto_save_failure_time
= -1;
707 b
->auto_save_file_name
= Qnil
;
709 b
->overlays_before
= NULL
;
710 b
->overlays_after
= NULL
;
711 b
->overlay_center
= BEG
;
712 b
->mark_active
= Qnil
;
713 b
->point_before_scroll
= Qnil
;
714 b
->file_format
= Qnil
;
715 b
->auto_save_file_format
= Qt
;
716 b
->last_selected_window
= Qnil
;
717 XSETINT (b
->display_count
, 0);
718 b
->display_time
= Qnil
;
719 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
720 b
->cursor_type
= buffer_defaults
.cursor_type
;
721 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
723 b
->display_error_modiff
= 0;
726 /* Reset buffer B's local variables info.
727 Don't use this on a buffer that has already been in use;
728 it does not treat permanent locals consistently.
729 Instead, use Fkill_all_local_variables.
731 If PERMANENT_TOO is 1, then we reset permanent built-in
732 buffer-local variables. If PERMANENT_TOO is 0,
733 we preserve those. */
736 reset_buffer_local_variables (b
, permanent_too
)
737 register struct buffer
*b
;
743 /* Reset the major mode to Fundamental, together with all the
744 things that depend on the major mode.
745 default-major-mode is handled at a higher level.
746 We ignore it here. */
747 b
->major_mode
= Qfundamental_mode
;
749 b
->mode_name
= QSFundamental
;
750 b
->minor_modes
= Qnil
;
752 /* If the standard case table has been altered and invalidated,
753 fix up its insides first. */
754 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
755 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
756 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
757 Fset_standard_case_table (Vascii_downcase_table
);
759 b
->downcase_table
= Vascii_downcase_table
;
760 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
761 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
762 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
763 b
->invisibility_spec
= Qt
;
765 b
->buffer_file_type
= Qnil
;
768 /* Reset all (or most) per-buffer variables to their defaults. */
769 b
->local_var_alist
= Qnil
;
770 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
771 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
772 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
774 /* For each slot that has a default value,
775 copy that into the slot. */
777 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
779 offset
+= sizeof (Lisp_Object
))
781 int idx
= PER_BUFFER_IDX (offset
);
784 || buffer_permanent_local_flags
[idx
] == 0))
785 /* Is -2 used anywhere? */
787 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
791 /* We split this away from generate-new-buffer, because rename-buffer
792 and set-visited-file-name ought to be able to use this to really
793 rename the buffer properly. */
795 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
797 doc
: /* Return a string that is the name of no existing buffer based on NAME.
798 If there is no live buffer named NAME, then return NAME.
799 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
800 \(starting at 2) until an unused name is found, and then return that name.
801 Optional second argument IGNORE specifies a name that is okay to use (if
802 it is in the sequence to be tried) even if a buffer with that name exists. */)
804 register Lisp_Object name
, ignore
;
806 register Lisp_Object gentemp
, tem
;
812 tem
= Fstring_equal (name
, ignore
);
815 tem
= Fget_buffer (name
);
822 sprintf (number
, "<%d>", ++count
);
823 gentemp
= concat2 (name
, build_string (number
));
824 tem
= Fstring_equal (gentemp
, ignore
);
827 tem
= Fget_buffer (gentemp
);
834 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
835 doc
: /* Return the name of BUFFER, as a string.
836 With no argument or nil as argument, return the name of the current buffer. */)
838 register Lisp_Object buffer
;
841 return current_buffer
->name
;
842 CHECK_BUFFER (buffer
);
843 return XBUFFER (buffer
)->name
;
846 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
847 doc
: /* Return name of file BUFFER is visiting, or nil if none.
848 No argument or nil as argument means use the current buffer. */)
850 register Lisp_Object buffer
;
853 return current_buffer
->filename
;
854 CHECK_BUFFER (buffer
);
855 return XBUFFER (buffer
)->filename
;
858 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
860 doc
: /* Return the base buffer of indirect buffer BUFFER.
861 If BUFFER is not indirect, return nil.
862 BUFFER defaults to the current buffer. */)
864 register Lisp_Object buffer
;
867 Lisp_Object base_buffer
;
870 base
= current_buffer
->base_buffer
;
873 CHECK_BUFFER (buffer
);
874 base
= XBUFFER (buffer
)->base_buffer
;
879 XSETBUFFER (base_buffer
, base
);
883 DEFUN ("buffer-local-value", Fbuffer_local_value
,
884 Sbuffer_local_value
, 2, 2, 0,
885 doc
: /* Return the value of VARIABLE in BUFFER.
886 If VARIABLE does not have a buffer-local binding in BUFFER, the value
887 is the default binding of the variable. */)
889 register Lisp_Object variable
;
890 register Lisp_Object buffer
;
892 register struct buffer
*buf
;
893 register Lisp_Object result
;
895 CHECK_SYMBOL (variable
);
896 CHECK_BUFFER (buffer
);
897 buf
= XBUFFER (buffer
);
899 if (SYMBOLP (variable
))
900 variable
= indirect_variable (variable
);
902 /* Look in local_var_list */
903 result
= Fassoc (variable
, buf
->local_var_alist
);
909 /* Look in special slots */
910 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
911 offset
< sizeof (struct buffer
);
912 /* sizeof EMACS_INT == sizeof Lisp_Object */
913 offset
+= (sizeof (EMACS_INT
)))
915 idx
= PER_BUFFER_IDX (offset
);
916 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
917 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
918 && EQ (PER_BUFFER_SYMBOL (offset
), variable
))
920 result
= PER_BUFFER_VALUE (buf
, offset
);
927 result
= Fdefault_value (variable
);
931 Lisp_Object valcontents
;
932 Lisp_Object current_alist_element
;
934 /* What binding is loaded right now? */
935 valcontents
= SYMBOL_VALUE (variable
);
936 current_alist_element
937 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
939 /* The value of the currently loaded binding is not
940 stored in it, but rather in the realvalue slot.
941 Store that value into the binding it belongs to
942 in case that is the one we are about to use. */
944 Fsetcdr (current_alist_element
,
945 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
947 /* Now get the (perhaps updated) value out of the binding. */
948 result
= XCDR (result
);
951 if (!EQ (result
, Qunbound
))
954 xsignal1 (Qvoid_variable
, variable
);
957 /* Return an alist of the Lisp-level buffer-local bindings of
958 buffer BUF. That is, don't include the variables maintained
959 in special slots in the buffer object. */
962 buffer_lisp_local_variables (buf
)
965 Lisp_Object result
= Qnil
;
966 register Lisp_Object tail
;
967 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
969 Lisp_Object val
, elt
;
973 /* Reference each variable in the alist in buf.
974 If inquiring about the current buffer, this gets the current values,
975 so store them into the alist so the alist is up to date.
976 If inquiring about some other buffer, this swaps out any values
977 for that buffer, making the alist up to date automatically. */
978 val
= find_symbol_value (XCAR (elt
));
979 /* Use the current buffer value only if buf is the current buffer. */
980 if (buf
!= current_buffer
)
983 /* If symbol is unbound, put just the symbol in the list. */
984 if (EQ (val
, Qunbound
))
985 result
= Fcons (XCAR (elt
), result
);
986 /* Otherwise, put (symbol . value) in the list. */
988 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
994 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
995 Sbuffer_local_variables
, 0, 1, 0,
996 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
997 Most elements look like (SYMBOL . VALUE), describing one variable.
998 For a symbol that is locally unbound, just the symbol appears in the value.
999 Note that storing new VALUEs in these elements doesn't change the variables.
1000 No argument or nil as argument means use current buffer as BUFFER. */)
1002 register Lisp_Object buffer
;
1004 register struct buffer
*buf
;
1005 register Lisp_Object result
;
1008 buf
= current_buffer
;
1011 CHECK_BUFFER (buffer
);
1012 buf
= XBUFFER (buffer
);
1015 result
= buffer_lisp_local_variables (buf
);
1017 /* Add on all the variables stored in special slots. */
1021 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
1022 offset
< sizeof (struct buffer
);
1023 /* sizeof EMACS_INT == sizeof Lisp_Object */
1024 offset
+= (sizeof (EMACS_INT
)))
1026 idx
= PER_BUFFER_IDX (offset
);
1027 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1028 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1029 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1030 PER_BUFFER_VALUE (buf
, offset
)),
1038 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1040 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1041 No argument or nil as argument means use current buffer as BUFFER. */)
1043 register Lisp_Object buffer
;
1045 register struct buffer
*buf
;
1047 buf
= current_buffer
;
1050 CHECK_BUFFER (buffer
);
1051 buf
= XBUFFER (buffer
);
1054 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1057 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1059 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1060 A non-nil FLAG means mark the buffer modified. */)
1062 register Lisp_Object flag
;
1064 register int already
;
1065 register Lisp_Object fn
;
1066 Lisp_Object buffer
, window
;
1068 #ifdef CLASH_DETECTION
1069 /* If buffer becoming modified, lock the file.
1070 If buffer becoming unmodified, unlock the file. */
1072 fn
= current_buffer
->file_truename
;
1073 /* Test buffer-file-name so that binding it to nil is effective. */
1074 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1076 already
= SAVE_MODIFF
< MODIFF
;
1077 if (!already
&& !NILP (flag
))
1079 else if (already
&& NILP (flag
))
1082 #endif /* CLASH_DETECTION */
1084 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1086 /* Set update_mode_lines only if buffer is displayed in some window.
1087 Packages like jit-lock or lazy-lock preserve a buffer's modified
1088 state by recording/restoring the state around blocks of code.
1089 Setting update_mode_lines makes redisplay consider all windows
1090 (on all frames). Stealth fontification of buffers not displayed
1091 would incur additional redisplay costs if we'd set
1092 update_modes_lines unconditionally.
1094 Ideally, I think there should be another mechanism for fontifying
1095 buffers without "modifying" buffers, or redisplay should be
1096 smarter about updating the `*' in mode lines. --gerd */
1097 XSETBUFFER (buffer
, current_buffer
);
1098 window
= Fget_buffer_window (buffer
, Qt
);
1099 if (WINDOWP (window
))
1101 ++update_mode_lines
;
1102 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1108 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1109 Srestore_buffer_modified_p
, 1, 1, 0,
1110 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1111 It is not ensured that mode lines will be updated to show the modified
1112 state of the current buffer. Use with care. */)
1116 #ifdef CLASH_DETECTION
1119 /* If buffer becoming modified, lock the file.
1120 If buffer becoming unmodified, unlock the file. */
1122 fn
= current_buffer
->file_truename
;
1123 /* Test buffer-file-name so that binding it to nil is effective. */
1124 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1126 int already
= SAVE_MODIFF
< MODIFF
;
1127 if (!already
&& !NILP (flag
))
1129 else if (already
&& NILP (flag
))
1132 #endif /* CLASH_DETECTION */
1134 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1138 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1140 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1141 Each buffer has a tick counter which is incremented each time the
1142 text in that buffer is changed. It wraps around occasionally.
1143 No argument or nil as argument means use current buffer as BUFFER. */)
1145 register Lisp_Object buffer
;
1147 register struct buffer
*buf
;
1149 buf
= current_buffer
;
1152 CHECK_BUFFER (buffer
);
1153 buf
= XBUFFER (buffer
);
1156 return make_number (BUF_MODIFF (buf
));
1159 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1160 Sbuffer_chars_modified_tick
, 0, 1, 0,
1161 doc
: /* Return BUFFER's character-change tick counter.
1162 Each buffer has a character-change tick counter, which is set to the
1163 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1164 time text in that buffer is inserted or deleted. By comparing the
1165 values returned by two individual calls of `buffer-chars-modified-tick',
1166 you can tell whether a character change occurred in that buffer in
1167 between these calls. No argument or nil as argument means use current
1168 buffer as BUFFER. */)
1170 register Lisp_Object buffer
;
1172 register struct buffer
*buf
;
1174 buf
= current_buffer
;
1177 CHECK_BUFFER (buffer
);
1178 buf
= XBUFFER (buffer
);
1181 return make_number (BUF_CHARS_MODIFF (buf
));
1184 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1185 "sRename buffer (to new name): \nP",
1186 doc
: /* Change current buffer's name to NEWNAME (a string).
1187 If second arg UNIQUE is nil or omitted, it is an error if a
1188 buffer named NEWNAME already exists.
1189 If UNIQUE is non-nil, come up with a new name using
1190 `generate-new-buffer-name'.
1191 Interactively, you can set UNIQUE with a prefix argument.
1192 We return the name we actually gave the buffer.
1193 This does not change the name of the visited file (if any). */)
1195 register Lisp_Object newname
, unique
;
1197 register Lisp_Object tem
, buf
;
1199 CHECK_STRING (newname
);
1201 if (SCHARS (newname
) == 0)
1202 error ("Empty string is invalid as a buffer name");
1204 tem
= Fget_buffer (newname
);
1207 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1208 rename the buffer automatically so you can create another
1209 with the original name. It makes UNIQUE equivalent to
1210 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1211 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1212 return current_buffer
->name
;
1214 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1216 error ("Buffer name `%s' is in use", SDATA (newname
));
1219 current_buffer
->name
= newname
;
1221 /* Catch redisplay's attention. Unless we do this, the mode lines for
1222 any windows displaying current_buffer will stay unchanged. */
1223 update_mode_lines
++;
1225 XSETBUFFER (buf
, current_buffer
);
1226 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1227 if (NILP (current_buffer
->filename
)
1228 && !NILP (current_buffer
->auto_save_file_name
))
1229 call0 (intern ("rename-auto-save-file"));
1230 /* Refetch since that last call may have done GC. */
1231 return current_buffer
->name
;
1234 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1235 doc
: /* Return most recently selected buffer other than BUFFER.
1236 Buffers not visible in windows are preferred to visible buffers,
1237 unless optional second argument VISIBLE-OK is non-nil.
1238 If the optional third argument FRAME is non-nil, use that frame's
1239 buffer list instead of the selected frame's buffer list.
1240 If no other buffer exists, the buffer `*scratch*' is returned.
1241 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1242 (buffer
, visible_ok
, frame
)
1243 register Lisp_Object buffer
, visible_ok
, frame
;
1245 Lisp_Object
Fset_buffer_major_mode ();
1246 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1250 frame
= selected_frame
;
1252 tail
= Vbuffer_alist
;
1253 pred
= frame_buffer_predicate (frame
);
1255 /* Consider buffers that have been seen in the selected frame
1256 before other buffers. */
1258 tem
= frame_buffer_list (frame
);
1262 if (BUFFERP (XCAR (tem
)))
1263 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1266 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1268 for (; CONSP (tail
); tail
= XCDR (tail
))
1270 buf
= Fcdr (XCAR (tail
));
1271 if (EQ (buf
, buffer
))
1275 if (NILP (XBUFFER (buf
)->name
))
1277 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1279 /* If the selected frame has a buffer_predicate,
1280 disregard buffers that don't fit the predicate. */
1283 tem
= call1 (pred
, buf
);
1288 if (NILP (visible_ok
))
1289 tem
= Fget_buffer_window (buf
, Qvisible
);
1294 if (NILP (notsogood
))
1297 if (!NILP (notsogood
))
1299 buf
= Fget_buffer (build_string ("*scratch*"));
1302 buf
= Fget_buffer_create (build_string ("*scratch*"));
1303 Fset_buffer_major_mode (buf
);
1308 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1310 doc
: /* Start keeping undo information for buffer BUFFER.
1311 No argument or nil as argument means do this for the current buffer. */)
1313 register Lisp_Object buffer
;
1315 Lisp_Object real_buffer
;
1318 XSETBUFFER (real_buffer
, current_buffer
);
1321 real_buffer
= Fget_buffer (buffer
);
1322 if (NILP (real_buffer
))
1326 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1327 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1333 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1334 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1335 The buffer being killed will be current while the hook is running.\n\
1338 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1339 doc
: /* Kill the buffer BUFFER.
1340 The argument may be a buffer or the name of a buffer.
1341 With a nil argument, kill the current buffer.
1343 Value is t if the buffer is actually killed, nil otherwise.
1345 The functions in `kill-buffer-query-functions' are called with BUFFER as
1346 the current buffer. If any of them returns nil, the buffer is not killed.
1348 The hook `kill-buffer-hook' is run before the buffer is actually killed.
1349 The buffer being killed will be current while the hook is running.
1351 Any processes that have this buffer as the `process-buffer' are killed
1357 register struct buffer
*b
;
1358 register Lisp_Object tem
;
1359 register struct Lisp_Marker
*m
;
1360 struct gcpro gcpro1
;
1363 buf
= Fcurrent_buffer ();
1365 buf
= Fget_buffer (buffer
);
1371 /* Avoid trouble for buffer already dead. */
1375 /* Query if the buffer is still modified. */
1376 if (INTERACTIVE
&& !NILP (b
->filename
)
1377 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1380 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1381 b
->name
, make_number (0)));
1387 /* Run hooks with the buffer to be killed the current buffer. */
1389 int count
= SPECPDL_INDEX ();
1390 Lisp_Object arglist
[1];
1392 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1393 set_buffer_internal (b
);
1395 /* First run the query functions; if any query is answered no,
1396 don't kill the buffer. */
1397 arglist
[0] = Qkill_buffer_query_functions
;
1398 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1400 return unbind_to (count
, Qnil
);
1402 /* Then run the hooks. */
1403 Frun_hooks (1, &Qkill_buffer_hook
);
1404 unbind_to (count
, Qnil
);
1407 /* We have no more questions to ask. Verify that it is valid
1408 to kill the buffer. This must be done after the questions
1409 since anything can happen within do_yes_or_no_p. */
1411 /* Don't kill the minibuffer now current. */
1412 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1418 /* When we kill a base buffer, kill all its indirect buffers.
1419 We do it at this stage so nothing terrible happens if they
1420 ask questions or their hooks get errors. */
1421 if (! b
->base_buffer
)
1423 struct buffer
*other
;
1427 for (other
= all_buffers
; other
; other
= other
->next
)
1428 /* all_buffers contains dead buffers too;
1429 don't re-kill them. */
1430 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1433 XSETBUFFER (buf
, other
);
1440 /* Make this buffer not be current.
1441 In the process, notice if this is the sole visible buffer
1442 and give up if so. */
1443 if (b
== current_buffer
)
1445 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1447 if (b
== current_buffer
)
1451 /* Notice if the buffer to kill is the sole visible buffer
1452 when we're currently in the mini-buffer, and give up if so. */
1453 XSETBUFFER (tem
, current_buffer
);
1454 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1456 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1461 /* Now there is no question: we can kill the buffer. */
1463 #ifdef CLASH_DETECTION
1464 /* Unlock this buffer's file, if it is locked. */
1466 #endif /* CLASH_DETECTION */
1469 kill_buffer_processes (buf
);
1472 /* Killing buffer processes may run sentinels which may
1473 have called kill-buffer. */
1478 clear_charpos_cache (b
);
1480 tem
= Vinhibit_quit
;
1482 replace_buffer_in_all_windows (buf
);
1483 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1484 frames_discard_buffer (buf
);
1485 Vinhibit_quit
= tem
;
1487 /* Delete any auto-save file, if we saved it in this session.
1488 But not if the buffer is modified. */
1489 if (STRINGP (b
->auto_save_file_name
)
1490 && b
->auto_save_modified
!= 0
1491 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1492 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1493 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1496 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1498 internal_delete_file (b
->auto_save_file_name
);
1503 /* Unchain all markers that belong to this indirect buffer.
1504 Don't unchain the markers that belong to the base buffer
1505 or its other indirect buffers. */
1506 for (m
= BUF_MARKERS (b
); m
; )
1508 struct Lisp_Marker
*next
= m
->next
;
1516 /* Unchain all markers of this buffer and its indirect buffers.
1517 and leave them pointing nowhere. */
1518 for (m
= BUF_MARKERS (b
); m
; )
1520 struct Lisp_Marker
*next
= m
->next
;
1525 BUF_MARKERS (b
) = NULL
;
1526 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1528 /* Perhaps we should explicitly free the interval tree here... */
1531 /* Reset the local variables, so that this buffer's local values
1532 won't be protected from GC. They would be protected
1533 if they happened to remain encached in their symbols.
1534 This gets rid of them for certain. */
1535 swap_out_buffer_local_variables (b
);
1536 reset_buffer_local_variables (b
, 1);
1541 if (! b
->base_buffer
)
1542 free_buffer_text (b
);
1544 if (b
->newline_cache
)
1546 free_region_cache (b
->newline_cache
);
1547 b
->newline_cache
= 0;
1549 if (b
->width_run_cache
)
1551 free_region_cache (b
->width_run_cache
);
1552 b
->width_run_cache
= 0;
1554 b
->width_table
= Qnil
;
1556 b
->undo_list
= Qnil
;
1561 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1562 we do this each time BUF is selected visibly, the more recently
1563 selected buffers are always closer to the front of the list. This
1564 means that other_buffer is more likely to choose a relevant buffer. */
1570 register Lisp_Object link
, prev
;
1572 frame
= selected_frame
;
1575 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1577 if (EQ (XCDR (XCAR (link
)), buf
))
1582 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1583 we cannot use Fdelq itself here because it allows quitting. */
1586 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1588 XSETCDR (prev
, XCDR (XCDR (prev
)));
1590 XSETCDR (link
, Vbuffer_alist
);
1591 Vbuffer_alist
= link
;
1593 /* Effectively do a delq on buried_buffer_list. */
1596 for (link
= XFRAME (frame
)->buried_buffer_list
; CONSP (link
);
1599 if (EQ (XCAR (link
), buf
))
1602 XFRAME (frame
)->buried_buffer_list
= XCDR (link
);
1604 XSETCDR (prev
, XCDR (XCDR (prev
)));
1610 /* Now move this buffer to the front of frame_buffer_list also. */
1613 for (link
= frame_buffer_list (frame
); CONSP (link
);
1616 if (EQ (XCAR (link
), buf
))
1621 /* Effectively do delq. */
1626 set_frame_buffer_list (frame
,
1627 XCDR (frame_buffer_list (frame
)));
1629 XSETCDR (prev
, XCDR (XCDR (prev
)));
1631 XSETCDR (link
, frame_buffer_list (frame
));
1632 set_frame_buffer_list (frame
, link
);
1635 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1638 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1639 doc
: /* Set an appropriate major mode for BUFFER.
1640 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1641 according to `default-major-mode'.
1642 Use this function before selecting the buffer, since it may need to inspect
1643 the current buffer's major mode. */)
1648 Lisp_Object function
;
1650 CHECK_BUFFER (buffer
);
1652 if (STRINGP (XBUFFER (buffer
)->name
)
1653 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1654 function
= find_symbol_value (intern ("initial-major-mode"));
1657 function
= buffer_defaults
.major_mode
;
1659 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1660 function
= current_buffer
->major_mode
;
1663 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1666 count
= SPECPDL_INDEX ();
1668 /* To select a nonfundamental mode,
1669 select the buffer temporarily and then call the mode function. */
1671 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1673 Fset_buffer (buffer
);
1676 return unbind_to (count
, Qnil
);
1679 /* If switching buffers in WINDOW would be an error, return
1680 a C string saying what the error would be. */
1683 no_switch_window (window
)
1687 if (EQ (minibuf_window
, window
))
1688 return "Cannot switch buffers in minibuffer window";
1689 tem
= Fwindow_dedicated_p (window
);
1691 return "Cannot switch buffers in a dedicated window";
1695 /* Switch to buffer BUFFER in the selected window.
1696 If NORECORD is non-nil, don't call record_buffer. */
1699 switch_to_buffer_1 (buffer
, norecord
)
1700 Lisp_Object buffer
, norecord
;
1702 register Lisp_Object buf
;
1705 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1708 buf
= Fget_buffer (buffer
);
1711 buf
= Fget_buffer_create (buffer
);
1712 Fset_buffer_major_mode (buf
);
1716 if (NILP (norecord
))
1717 record_buffer (buf
);
1719 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1720 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1727 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1728 doc
: /* Select buffer BUFFER in the current window.
1729 If BUFFER does not identify an existing buffer,
1730 then this function creates a buffer with that name.
1732 When called from Lisp, BUFFER may be a buffer, a string \(a buffer name),
1733 or nil. If BUFFER is nil, then this function chooses a buffer
1734 using `other-buffer'.
1735 Optional second arg NORECORD non-nil means
1736 do not put this buffer at the front of the list of recently selected ones.
1737 This function returns the buffer it switched to.
1739 WARNING: This is NOT the way to work on another buffer temporarily
1740 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1741 the window-buffer correspondences. */)
1743 Lisp_Object buffer
, norecord
;
1747 if (EQ (buffer
, Fwindow_buffer (selected_window
)))
1749 /* Basically a NOP. Avoid signalling an error in the case where
1750 the selected window is dedicated, or a minibuffer. */
1752 /* But do put this buffer at the front of the buffer list,
1753 unless that has been inhibited. Note that even if
1754 BUFFER is at the front of the main buffer-list already,
1755 we still want to move it to the front of the frame's buffer list. */
1756 if (NILP (norecord
))
1757 record_buffer (buffer
);
1758 return Fset_buffer (buffer
);
1761 err
= no_switch_window (selected_window
);
1762 if (err
) error (err
);
1764 return switch_to_buffer_1 (buffer
, norecord
);
1767 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1768 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1769 BUFFER may be a buffer, a string \(a buffer name), or nil.
1770 If BUFFER is a string which is not the name of an existing buffer,
1771 then this function creates a buffer with that name.
1772 If BUFFER is nil, then it chooses some other buffer.
1773 If `pop-up-windows' is non-nil, windows can be split to do this.
1774 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1775 window even if BUFFER is already visible in the selected window,
1776 and ignore `same-window-regexps' and `same-window-buffer-names'.
1777 This function returns the buffer it switched to.
1778 This uses the function `display-buffer' as a subroutine; see the documentation
1779 of `display-buffer' for additional customization information.
1781 Optional third arg NORECORD non-nil means
1782 do not put this buffer at the front of the list of recently selected ones. */)
1783 (buffer
, other_window
, norecord
)
1784 Lisp_Object buffer
, other_window
, norecord
;
1786 register Lisp_Object buf
;
1788 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1791 buf
= Fget_buffer (buffer
);
1794 buf
= Fget_buffer_create (buffer
);
1795 Fset_buffer_major_mode (buf
);
1799 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
), norecord
);
1803 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1804 doc
: /* Return the current buffer as a Lisp object. */)
1807 register Lisp_Object buf
;
1808 XSETBUFFER (buf
, current_buffer
);
1812 /* Set the current buffer to B.
1814 We previously set windows_or_buffers_changed here to invalidate
1815 global unchanged information in beg_unchanged and end_unchanged.
1816 This is no longer necessary because we now compute unchanged
1817 information on a buffer-basis. Every action affecting other
1818 windows than the selected one requires a select_window at some
1819 time, and that increments windows_or_buffers_changed. */
1822 set_buffer_internal (b
)
1823 register struct buffer
*b
;
1825 if (current_buffer
!= b
)
1826 set_buffer_internal_1 (b
);
1829 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1830 This is used by redisplay. */
1833 set_buffer_internal_1 (b
)
1834 register struct buffer
*b
;
1836 register struct buffer
*old_buf
;
1837 register Lisp_Object tail
, valcontents
;
1840 #ifdef USE_MMAP_FOR_BUFFERS
1841 if (b
->text
->beg
== NULL
)
1842 enlarge_buffer_text (b
, 0);
1843 #endif /* USE_MMAP_FOR_BUFFERS */
1845 if (current_buffer
== b
)
1848 old_buf
= current_buffer
;
1850 last_known_column_point
= -1; /* invalidate indentation cache */
1854 /* Put the undo list back in the base buffer, so that it appears
1855 that an indirect buffer shares the undo list of its base. */
1856 if (old_buf
->base_buffer
)
1857 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1859 /* If the old current buffer has markers to record PT, BEGV and ZV
1860 when it is not current, update them now. */
1861 if (! NILP (old_buf
->pt_marker
))
1864 XSETBUFFER (obuf
, old_buf
);
1865 set_marker_both (old_buf
->pt_marker
, obuf
,
1866 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1868 if (! NILP (old_buf
->begv_marker
))
1871 XSETBUFFER (obuf
, old_buf
);
1872 set_marker_both (old_buf
->begv_marker
, obuf
,
1873 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1875 if (! NILP (old_buf
->zv_marker
))
1878 XSETBUFFER (obuf
, old_buf
);
1879 set_marker_both (old_buf
->zv_marker
, obuf
,
1880 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1884 /* Get the undo list from the base buffer, so that it appears
1885 that an indirect buffer shares the undo list of its base. */
1887 b
->undo_list
= b
->base_buffer
->undo_list
;
1889 /* If the new current buffer has markers to record PT, BEGV and ZV
1890 when it is not current, fetch them now. */
1891 if (! NILP (b
->pt_marker
))
1893 BUF_PT (b
) = marker_position (b
->pt_marker
);
1894 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1896 if (! NILP (b
->begv_marker
))
1898 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1899 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1901 if (! NILP (b
->zv_marker
))
1903 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1904 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1907 /* Look down buffer's list of local Lisp variables
1908 to find and update any that forward into C variables. */
1910 for (tail
= b
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1912 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1913 if ((BUFFER_LOCAL_VALUEP (valcontents
))
1914 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1915 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1916 /* Just reference the variable
1917 to cause it to become set for this buffer. */
1918 Fsymbol_value (XCAR (XCAR (tail
)));
1921 /* Do the same with any others that were local to the previous buffer */
1924 for (tail
= old_buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1926 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1927 if ((BUFFER_LOCAL_VALUEP (valcontents
))
1928 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1929 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1930 /* Just reference the variable
1931 to cause it to become set for this buffer. */
1932 Fsymbol_value (XCAR (XCAR (tail
)));
1936 /* Switch to buffer B temporarily for redisplay purposes.
1937 This avoids certain things that don't need to be done within redisplay. */
1943 register struct buffer
*old_buf
;
1945 if (current_buffer
== b
)
1948 old_buf
= current_buffer
;
1953 /* If the old current buffer has markers to record PT, BEGV and ZV
1954 when it is not current, update them now. */
1955 if (! NILP (old_buf
->pt_marker
))
1958 XSETBUFFER (obuf
, old_buf
);
1959 set_marker_both (old_buf
->pt_marker
, obuf
,
1960 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1962 if (! NILP (old_buf
->begv_marker
))
1965 XSETBUFFER (obuf
, old_buf
);
1966 set_marker_both (old_buf
->begv_marker
, obuf
,
1967 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1969 if (! NILP (old_buf
->zv_marker
))
1972 XSETBUFFER (obuf
, old_buf
);
1973 set_marker_both (old_buf
->zv_marker
, obuf
,
1974 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1978 /* If the new current buffer has markers to record PT, BEGV and ZV
1979 when it is not current, fetch them now. */
1980 if (! NILP (b
->pt_marker
))
1982 BUF_PT (b
) = marker_position (b
->pt_marker
);
1983 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1985 if (! NILP (b
->begv_marker
))
1987 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1988 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1990 if (! NILP (b
->zv_marker
))
1992 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1993 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1997 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1998 doc
: /* Make the buffer BUFFER current for editing operations.
1999 BUFFER may be a buffer or the name of an existing buffer.
2000 See also `save-excursion' when you want to make a buffer current temporarily.
2001 This function does not display the buffer, so its effect ends
2002 when the current command terminates.
2003 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
2005 register Lisp_Object buffer
;
2007 register Lisp_Object buf
;
2008 buf
= Fget_buffer (buffer
);
2011 if (NILP (XBUFFER (buf
)->name
))
2012 error ("Selecting deleted buffer");
2013 set_buffer_internal (XBUFFER (buf
));
2017 /* Set the current buffer to BUFFER provided it is alive. */
2020 set_buffer_if_live (buffer
)
2023 if (! NILP (XBUFFER (buffer
)->name
))
2024 Fset_buffer (buffer
);
2028 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
2029 Sbarf_if_buffer_read_only
, 0, 0, 0,
2030 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
2033 if (!NILP (current_buffer
->read_only
)
2034 && NILP (Vinhibit_read_only
))
2035 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
2039 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
2040 doc
: /* Put BUFFER at the end of the list of all buffers.
2041 There it is the least likely candidate for `other-buffer' to return;
2042 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
2043 You can specify a buffer name as BUFFER, or an actual buffer object.
2044 If BUFFER is nil or omitted, bury the current buffer.
2045 Also, if BUFFER is nil or omitted, remove the current buffer from the
2046 selected window if it is displayed there. */)
2048 register Lisp_Object buffer
;
2050 /* Figure out what buffer we're going to bury. */
2054 XSETBUFFER (buffer
, current_buffer
);
2056 tem
= Fwindow_buffer (selected_window
);
2057 /* If we're burying the current buffer, unshow it. */
2058 if (EQ (buffer
, tem
))
2060 if (NILP (Fwindow_dedicated_p (selected_window
)))
2061 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
2062 else if (NILP (XWINDOW (selected_window
)->parent
))
2063 Ficonify_frame (Fwindow_frame (selected_window
));
2065 Fdelete_window (selected_window
);
2072 buf1
= Fget_buffer (buffer
);
2078 /* Move buffer to the end of the buffer list. Do nothing if the
2079 buffer is killed. */
2080 if (!NILP (XBUFFER (buffer
)->name
))
2082 Lisp_Object aelt
, link
;
2084 aelt
= Frassq (buffer
, Vbuffer_alist
);
2085 link
= Fmemq (aelt
, Vbuffer_alist
);
2086 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
2087 XSETCDR (link
, Qnil
);
2088 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
2090 XFRAME (selected_frame
)->buffer_list
2091 = Fdelq (buffer
, XFRAME (selected_frame
)->buffer_list
);
2092 XFRAME (selected_frame
)->buried_buffer_list
2093 = Fcons (buffer
, Fdelq (buffer
, XFRAME (selected_frame
)->buried_buffer_list
));
2099 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2100 doc
: /* Delete the entire contents of the current buffer.
2101 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2102 so the buffer is truly empty after this. */)
2109 current_buffer
->last_window_start
= 1;
2110 /* Prevent warnings, or suspension of auto saving, that would happen
2111 if future size is less than past size. Use of erase-buffer
2112 implies that the future text is not really related to the past text. */
2113 XSETFASTINT (current_buffer
->save_length
, 0);
2118 validate_region (b
, e
)
2119 register Lisp_Object
*b
, *e
;
2121 CHECK_NUMBER_COERCE_MARKER (*b
);
2122 CHECK_NUMBER_COERCE_MARKER (*e
);
2124 if (XINT (*b
) > XINT (*e
))
2127 tem
= *b
; *b
= *e
; *e
= tem
;
2130 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2131 && XINT (*e
) <= ZV
))
2132 args_out_of_range (*b
, *e
);
2135 /* Advance BYTE_POS up to a character boundary
2136 and return the adjusted position. */
2139 advance_to_char_boundary (byte_pos
)
2144 if (byte_pos
== BEG
)
2145 /* Beginning of buffer is always a character boundary. */
2148 c
= FETCH_BYTE (byte_pos
);
2149 if (! CHAR_HEAD_P (c
))
2151 /* We should advance BYTE_POS only when C is a constituent of a
2152 multibyte sequence. */
2153 int orig_byte_pos
= byte_pos
;
2158 c
= FETCH_BYTE (byte_pos
);
2160 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2162 if (byte_pos
< orig_byte_pos
)
2163 byte_pos
= orig_byte_pos
;
2164 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2165 surely advance to the correct character boundary. If C is
2166 not, BYTE_POS was unchanged. */
2172 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2174 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2175 If FLAG is t, this makes the buffer a multibyte buffer.
2176 If FLAG is nil, this makes the buffer a single-byte buffer.
2177 In these cases, the buffer contents remain unchanged as a sequence of
2178 bytes but the contents viewed as characters do change.
2179 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2180 all eight-bit bytes to eight-bit characters.
2181 If the multibyte flag was really changed, undo information of the
2182 current buffer is cleared. */)
2186 struct Lisp_Marker
*tail
, *markers
;
2187 struct buffer
*other
;
2189 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2190 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2191 Lisp_Object old_undo
= current_buffer
->undo_list
;
2192 struct gcpro gcpro1
;
2194 if (current_buffer
->base_buffer
)
2195 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2197 /* Do nothing if nothing actually changes. */
2198 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2203 /* Don't record these buffer changes. We will put a special undo entry
2205 current_buffer
->undo_list
= Qt
;
2207 /* If the cached position is for this buffer, clear it out. */
2208 clear_charpos_cache (current_buffer
);
2211 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2213 begv
= BEGV
, zv
= ZV
;
2223 /* Do this first, so it can use CHAR_TO_BYTE
2224 to calculate the old correspondences. */
2225 set_intervals_multibyte (0);
2227 current_buffer
->enable_multibyte_characters
= Qnil
;
2233 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2236 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2237 tail
->charpos
= tail
->bytepos
;
2239 /* Convert multibyte form of 8-bit characters to unibyte. */
2254 if (ASCII_BYTE_P (*p
))
2256 else if (CHAR_BYTE8_HEAD_P (*p
))
2258 c
= STRING_CHAR_AND_LENGTH (p
, stop
- pos
, bytes
);
2259 /* Delete all bytes for this 8-bit character but the
2260 last one, and change the last one to the charcter
2263 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2275 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2276 p
+= bytes
, pos
+= bytes
;
2280 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2286 unsigned char *p
, *pend
;
2288 /* Be sure not to have a multibyte sequence striding over the GAP.
2289 Ex: We change this: "...abc\302 _GAP_ \241def..."
2290 to: "...abc _GAP_ \302\241def..." */
2293 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2294 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2296 unsigned char *p
= GPT_ADDR
- 1;
2298 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2299 if (BASE_LEADING_CODE_P (*p
))
2301 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2303 move_gap_both (new_gpt
, new_gpt
);
2307 /* Make the buffer contents valid as multibyte by converting
2308 8-bit characters to multibyte form. */
2326 if (ASCII_BYTE_P (*p
))
2328 else if (EQ (flag
, Qt
) && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2329 p
+= bytes
, pos
+= bytes
;
2332 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2335 c
= BYTE8_TO_CHAR (*p
);
2336 bytes
= CHAR_STRING (c
, tmp
);
2338 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2340 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2341 /* Now the gap is after the just inserted data. */
2359 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2361 /* Do this first, so that chars_in_text asks the right question.
2362 set_intervals_multibyte needs it too. */
2363 current_buffer
->enable_multibyte_characters
= Qt
;
2365 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2366 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2368 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2370 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2371 if (BEGV_BYTE
> GPT_BYTE
)
2372 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2374 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2376 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2377 if (ZV_BYTE
> GPT_BYTE
)
2378 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2380 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2383 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2386 if (pt_byte
> GPT_BYTE
)
2387 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2389 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2390 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2393 tail
= markers
= BUF_MARKERS (current_buffer
);
2395 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2396 getting confused by the markers that have not yet been updated.
2397 It is also a signal that it should never create a marker. */
2398 BUF_MARKERS (current_buffer
) = NULL
;
2400 for (; tail
; tail
= tail
->next
)
2402 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2403 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2406 /* Make sure no markers were put on the chain
2407 while the chain value was incorrect. */
2408 if (BUF_MARKERS (current_buffer
))
2411 BUF_MARKERS (current_buffer
) = markers
;
2413 /* Do this last, so it can calculate the new correspondences
2414 between chars and bytes. */
2415 set_intervals_multibyte (1);
2418 if (!EQ (old_undo
, Qt
))
2420 /* Represent all the above changes by a special undo entry. */
2421 extern Lisp_Object Qapply
;
2422 current_buffer
->undo_list
= Fcons (list3 (Qapply
,
2423 intern ("set-buffer-multibyte"),
2424 NILP (flag
) ? Qt
: Qnil
),
2430 /* Changing the multibyteness of a buffer means that all windows
2431 showing that buffer must be updated thoroughly. */
2432 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2433 ++windows_or_buffers_changed
;
2435 /* Copy this buffer's new multibyte status
2436 into all of its indirect buffers. */
2437 for (other
= all_buffers
; other
; other
= other
->next
)
2438 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2440 other
->enable_multibyte_characters
2441 = current_buffer
->enable_multibyte_characters
;
2442 other
->prevent_redisplay_optimizations_p
= 1;
2445 /* Restore the modifiedness of the buffer. */
2446 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2447 Fset_buffer_modified_p (Qnil
);
2450 /* Update coding systems of this buffer's process (if any). */
2452 Lisp_Object process
;
2454 process
= Fget_buffer_process (Fcurrent_buffer ());
2455 if (PROCESSP (process
))
2456 setup_process_coding_systems (process
);
2458 #endif /* subprocesses */
2463 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2465 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2466 Most local variable bindings are eliminated so that the default values
2467 become effective once more. Also, the syntax table is set from
2468 `standard-syntax-table', the local keymap is set to nil,
2469 and the abbrev table from `fundamental-mode-abbrev-table'.
2470 This function also forces redisplay of the mode line.
2472 Every function to select a new major mode starts by
2473 calling this function.
2475 As a special exception, local variables whose names have
2476 a non-nil `permanent-local' property are not eliminated by this function.
2478 The first thing this function does is run
2479 the normal hook `change-major-mode-hook'. */)
2482 register Lisp_Object alist
, sym
, tem
;
2485 if (!NILP (Vrun_hooks
))
2486 call1 (Vrun_hooks
, Qchange_major_mode_hook
);
2487 oalist
= current_buffer
->local_var_alist
;
2489 /* Make sure none of the bindings in oalist
2490 remain swapped in, in their symbols. */
2492 swap_out_buffer_local_variables (current_buffer
);
2494 /* Actually eliminate all local bindings of this buffer. */
2496 reset_buffer_local_variables (current_buffer
, 0);
2498 /* Any which are supposed to be permanent,
2499 make local again, with the same values they had. */
2501 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2503 sym
= XCAR (XCAR (alist
));
2504 tem
= Fget (sym
, Qpermanent_local
);
2507 Fmake_local_variable (sym
);
2508 Fset (sym
, XCDR (XCAR (alist
)));
2512 /* Force mode-line redisplay. Useful here because all major mode
2513 commands call this function. */
2514 update_mode_lines
++;
2519 /* Make sure no local variables remain set up with buffer B
2520 for their current values. */
2523 swap_out_buffer_local_variables (b
)
2526 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2528 XSETBUFFER (buffer
, b
);
2529 oalist
= b
->local_var_alist
;
2531 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2533 sym
= XCAR (XCAR (alist
));
2535 /* Need not do anything if some other buffer's binding is now encached. */
2536 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2537 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2539 /* Symbol is set up for this buffer's old local value.
2540 Set it up for the current buffer with the default value. */
2542 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2543 /* Store the symbol's current value into the alist entry
2544 it is currently set up for. This is so that, if the
2545 local is marked permanent, and we make it local again
2546 later in Fkill_all_local_variables, we don't lose the value. */
2547 XSETCDR (XCAR (tem
),
2548 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2549 /* Switch to the symbol's default-value alist entry. */
2551 /* Mark it as current for buffer B. */
2552 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2553 /* Store the current value into any forwarding in the symbol. */
2554 store_symval_forwarding (sym
,
2555 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2561 /* Find all the overlays in the current buffer that contain position POS.
2562 Return the number found, and store them in a vector in *VEC_PTR.
2563 Store in *LEN_PTR the size allocated for the vector.
2564 Store in *NEXT_PTR the next position after POS where an overlay starts,
2565 or ZV if there are no more overlays between POS and ZV.
2566 Store in *PREV_PTR the previous position before POS where an overlay ends,
2567 or where an overlay starts which ends at or after POS;
2568 or BEGV if there are no such overlays from BEGV to POS.
2569 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2571 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2572 when this function is called.
2574 If EXTEND is non-zero, we make the vector bigger if necessary.
2575 If EXTEND is zero, we never extend the vector,
2576 and we store only as many overlays as will fit.
2577 But we still return the total number of overlays.
2579 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2580 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2581 default (BEGV or ZV). */
2584 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2587 Lisp_Object
**vec_ptr
;
2593 Lisp_Object overlay
, start
, end
;
2594 struct Lisp_Overlay
*tail
;
2597 Lisp_Object
*vec
= *vec_ptr
;
2600 int inhibit_storing
= 0;
2602 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2604 int startpos
, endpos
;
2606 XSETMISC (overlay
, tail
);
2608 start
= OVERLAY_START (overlay
);
2609 end
= OVERLAY_END (overlay
);
2610 endpos
= OVERLAY_POSITION (end
);
2617 startpos
= OVERLAY_POSITION (start
);
2618 /* This one ends at or after POS
2619 so its start counts for PREV_PTR if it's before POS. */
2620 if (prev
< startpos
&& startpos
< pos
)
2624 if (startpos
<= pos
)
2628 /* The supplied vector is full.
2629 Either make it bigger, or don't store any more in it. */
2632 /* Make it work with an initial len == 0. */
2637 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2641 inhibit_storing
= 1;
2644 if (!inhibit_storing
)
2646 /* Keep counting overlays even if we can't return them all. */
2649 else if (startpos
< next
)
2653 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2655 int startpos
, endpos
;
2657 XSETMISC (overlay
, tail
);
2659 start
= OVERLAY_START (overlay
);
2660 end
= OVERLAY_END (overlay
);
2661 startpos
= OVERLAY_POSITION (start
);
2664 if (startpos
< next
)
2668 endpos
= OVERLAY_POSITION (end
);
2675 /* Make it work with an initial len == 0. */
2680 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2684 inhibit_storing
= 1;
2687 if (!inhibit_storing
)
2691 if (startpos
< pos
&& startpos
> prev
)
2694 else if (endpos
< pos
&& endpos
> prev
)
2696 else if (endpos
== pos
&& startpos
> prev
2697 && (!change_req
|| startpos
< pos
))
2708 /* Find all the overlays in the current buffer that overlap the range BEG-END
2709 or are empty at BEG.
2711 Return the number found, and store them in a vector in *VEC_PTR.
2712 Store in *LEN_PTR the size allocated for the vector.
2713 Store in *NEXT_PTR the next position after POS where an overlay starts,
2714 or ZV if there are no more overlays.
2715 Store in *PREV_PTR the previous position before POS where an overlay ends,
2716 or BEGV if there are no previous overlays.
2717 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2719 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2720 when this function is called.
2722 If EXTEND is non-zero, we make the vector bigger if necessary.
2723 If EXTEND is zero, we never extend the vector,
2724 and we store only as many overlays as will fit.
2725 But we still return the total number of overlays. */
2728 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2731 Lisp_Object
**vec_ptr
;
2736 Lisp_Object overlay
, ostart
, oend
;
2737 struct Lisp_Overlay
*tail
;
2740 Lisp_Object
*vec
= *vec_ptr
;
2743 int inhibit_storing
= 0;
2745 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2747 int startpos
, endpos
;
2749 XSETMISC (overlay
, tail
);
2751 ostart
= OVERLAY_START (overlay
);
2752 oend
= OVERLAY_END (overlay
);
2753 endpos
= OVERLAY_POSITION (oend
);
2760 startpos
= OVERLAY_POSITION (ostart
);
2761 /* Count an interval if it either overlaps the range
2762 or is empty at the start of the range. */
2763 if ((beg
< endpos
&& startpos
< end
)
2764 || (startpos
== endpos
&& beg
== endpos
))
2768 /* The supplied vector is full.
2769 Either make it bigger, or don't store any more in it. */
2772 /* Make it work with an initial len == 0. */
2777 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2781 inhibit_storing
= 1;
2784 if (!inhibit_storing
)
2786 /* Keep counting overlays even if we can't return them all. */
2789 else if (startpos
< next
)
2793 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2795 int startpos
, endpos
;
2797 XSETMISC (overlay
, tail
);
2799 ostart
= OVERLAY_START (overlay
);
2800 oend
= OVERLAY_END (overlay
);
2801 startpos
= OVERLAY_POSITION (ostart
);
2804 if (startpos
< next
)
2808 endpos
= OVERLAY_POSITION (oend
);
2809 /* Count an interval if it either overlaps the range
2810 or is empty at the start of the range. */
2811 if ((beg
< endpos
&& startpos
< end
)
2812 || (startpos
== endpos
&& beg
== endpos
))
2818 /* Make it work with an initial len == 0. */
2823 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2827 inhibit_storing
= 1;
2830 if (!inhibit_storing
)
2834 else if (endpos
< beg
&& endpos
> prev
)
2846 /* Return non-zero if there exists an overlay with a non-nil
2847 `mouse-face' property overlapping OVERLAY. */
2850 mouse_face_overlay_overlaps (overlay
)
2851 Lisp_Object overlay
;
2853 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2854 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2856 Lisp_Object
*v
, tem
;
2859 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2860 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2863 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2864 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2867 for (i
= 0; i
< n
; ++i
)
2868 if (!EQ (v
[i
], overlay
)
2869 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2878 /* Fast function to just test if we're at an overlay boundary. */
2880 overlay_touches_p (pos
)
2883 Lisp_Object overlay
;
2884 struct Lisp_Overlay
*tail
;
2886 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2890 XSETMISC (overlay
,tail
);
2891 if (!OVERLAYP (overlay
))
2894 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2897 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2901 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2905 XSETMISC (overlay
, tail
);
2906 if (!OVERLAYP (overlay
))
2909 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2912 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2920 Lisp_Object overlay
;
2926 compare_overlays (v1
, v2
)
2927 const void *v1
, *v2
;
2929 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2930 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2931 if (s1
->priority
!= s2
->priority
)
2932 return s1
->priority
- s2
->priority
;
2933 if (s1
->beg
!= s2
->beg
)
2934 return s1
->beg
- s2
->beg
;
2935 if (s1
->end
!= s2
->end
)
2936 return s2
->end
- s1
->end
;
2940 /* Sort an array of overlays by priority. The array is modified in place.
2941 The return value is the new size; this may be smaller than the original
2942 size if some of the overlays were invalid or were window-specific. */
2944 sort_overlays (overlay_vec
, noverlays
, w
)
2945 Lisp_Object
*overlay_vec
;
2950 struct sortvec
*sortvec
;
2951 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2953 /* Put the valid and relevant overlays into sortvec. */
2955 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2958 Lisp_Object overlay
;
2960 overlay
= overlay_vec
[i
];
2961 if (OVERLAY_VALID (overlay
)
2962 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2963 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2965 /* If we're interested in a specific window, then ignore
2966 overlays that are limited to some other window. */
2971 window
= Foverlay_get (overlay
, Qwindow
);
2972 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2976 /* This overlay is good and counts: put it into sortvec. */
2977 sortvec
[j
].overlay
= overlay
;
2978 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2979 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2980 tem
= Foverlay_get (overlay
, Qpriority
);
2982 sortvec
[j
].priority
= XINT (tem
);
2984 sortvec
[j
].priority
= 0;
2990 /* Sort the overlays into the proper order: increasing priority. */
2993 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2995 for (i
= 0; i
< noverlays
; i
++)
2996 overlay_vec
[i
] = sortvec
[i
].overlay
;
3002 Lisp_Object string
, string2
;
3009 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
3010 int size
; /* Allocated length of that array. */
3011 int used
; /* How much of the array is currently in use. */
3012 int bytes
; /* Total length of the strings in buf. */
3015 /* Buffers for storing information about the overlays touching a given
3016 position. These could be automatic variables in overlay_strings, but
3017 it's more efficient to hold onto the memory instead of repeatedly
3018 allocating and freeing it. */
3019 static struct sortstrlist overlay_heads
, overlay_tails
;
3020 static unsigned char *overlay_str_buf
;
3022 /* Allocated length of overlay_str_buf. */
3023 static int overlay_str_len
;
3025 /* A comparison function suitable for passing to qsort. */
3027 cmp_for_strings (as1
, as2
)
3030 struct sortstr
*s1
= (struct sortstr
*)as1
;
3031 struct sortstr
*s2
= (struct sortstr
*)as2
;
3032 if (s1
->size
!= s2
->size
)
3033 return s2
->size
- s1
->size
;
3034 if (s1
->priority
!= s2
->priority
)
3035 return s1
->priority
- s2
->priority
;
3040 record_overlay_string (ssl
, str
, str2
, pri
, size
)
3041 struct sortstrlist
*ssl
;
3042 Lisp_Object str
, str2
, pri
;
3047 if (ssl
->used
== ssl
->size
)
3053 ssl
->buf
= ((struct sortstr
*)
3054 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
3056 ssl
->buf
[ssl
->used
].string
= str
;
3057 ssl
->buf
[ssl
->used
].string2
= str2
;
3058 ssl
->buf
[ssl
->used
].size
= size
;
3059 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
3062 if (NILP (current_buffer
->enable_multibyte_characters
))
3063 nbytes
= SCHARS (str
);
3064 else if (! STRING_MULTIBYTE (str
))
3065 nbytes
= count_size_as_multibyte (SDATA (str
),
3068 nbytes
= SBYTES (str
);
3070 ssl
->bytes
+= nbytes
;
3074 if (NILP (current_buffer
->enable_multibyte_characters
))
3075 nbytes
= SCHARS (str2
);
3076 else if (! STRING_MULTIBYTE (str2
))
3077 nbytes
= count_size_as_multibyte (SDATA (str2
),
3080 nbytes
= SBYTES (str2
);
3082 ssl
->bytes
+= nbytes
;
3086 /* Return the concatenation of the strings associated with overlays that
3087 begin or end at POS, ignoring overlays that are specific to a window
3088 other than W. The strings are concatenated in the appropriate order:
3089 shorter overlays nest inside longer ones, and higher priority inside
3090 lower. Normally all of the after-strings come first, but zero-sized
3091 overlays have their after-strings ride along with the before-strings
3092 because it would look strange to print them inside-out.
3094 Returns the string length, and stores the contents indirectly through
3095 PSTR, if that variable is non-null. The string may be overwritten by
3096 subsequent calls. */
3099 overlay_strings (pos
, w
, pstr
)
3102 unsigned char **pstr
;
3104 Lisp_Object overlay
, window
, str
;
3105 struct Lisp_Overlay
*ov
;
3106 int startpos
, endpos
;
3107 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
3109 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3110 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3111 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3113 XSETMISC (overlay
, ov
);
3114 eassert (OVERLAYP (overlay
));
3116 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3117 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3120 if (endpos
!= pos
&& startpos
!= pos
)
3122 window
= Foverlay_get (overlay
, Qwindow
);
3123 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3126 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3127 record_overlay_string (&overlay_heads
, str
,
3129 ? Foverlay_get (overlay
, Qafter_string
)
3131 Foverlay_get (overlay
, Qpriority
),
3133 else if (endpos
== pos
3134 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3135 record_overlay_string (&overlay_tails
, str
, Qnil
,
3136 Foverlay_get (overlay
, Qpriority
),
3139 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3141 XSETMISC (overlay
, ov
);
3142 eassert (OVERLAYP (overlay
));
3144 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3145 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3148 if (endpos
!= pos
&& startpos
!= pos
)
3150 window
= Foverlay_get (overlay
, Qwindow
);
3151 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3154 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3155 record_overlay_string (&overlay_heads
, str
,
3157 ? Foverlay_get (overlay
, Qafter_string
)
3159 Foverlay_get (overlay
, Qpriority
),
3161 else if (endpos
== pos
3162 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3163 record_overlay_string (&overlay_tails
, str
, Qnil
,
3164 Foverlay_get (overlay
, Qpriority
),
3167 if (overlay_tails
.used
> 1)
3168 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3170 if (overlay_heads
.used
> 1)
3171 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3173 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3178 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3180 if (total
> overlay_str_len
)
3182 overlay_str_len
= total
;
3183 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3186 p
= overlay_str_buf
;
3187 for (i
= overlay_tails
.used
; --i
>= 0;)
3190 tem
= overlay_tails
.buf
[i
].string
;
3191 nbytes
= copy_text (SDATA (tem
), p
,
3193 STRING_MULTIBYTE (tem
), multibyte
);
3196 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3199 tem
= overlay_heads
.buf
[i
].string
;
3200 nbytes
= copy_text (SDATA (tem
), p
,
3202 STRING_MULTIBYTE (tem
), multibyte
);
3204 tem
= overlay_heads
.buf
[i
].string2
;
3207 nbytes
= copy_text (SDATA (tem
), p
,
3209 STRING_MULTIBYTE (tem
), multibyte
);
3213 if (p
!= overlay_str_buf
+ total
)
3216 *pstr
= overlay_str_buf
;
3222 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3225 recenter_overlay_lists (buf
, pos
)
3229 Lisp_Object overlay
, beg
, end
;
3230 struct Lisp_Overlay
*prev
, *tail
, *next
;
3232 /* See if anything in overlays_before should move to overlays_after. */
3234 /* We don't strictly need prev in this loop; it should always be nil.
3235 But we use it for symmetry and in case that should cease to be true
3236 with some future change. */
3238 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3241 XSETMISC (overlay
, tail
);
3243 /* If the overlay is not valid, get rid of it. */
3244 if (!OVERLAY_VALID (overlay
))
3249 /* Splice the cons cell TAIL out of overlays_before. */
3253 buf
->overlays_before
= next
;
3259 beg
= OVERLAY_START (overlay
);
3260 end
= OVERLAY_END (overlay
);
3262 if (OVERLAY_POSITION (end
) > pos
)
3264 /* OVERLAY needs to be moved. */
3265 int where
= OVERLAY_POSITION (beg
);
3266 struct Lisp_Overlay
*other
, *other_prev
;
3268 /* Splice the cons cell TAIL out of overlays_before. */
3272 buf
->overlays_before
= next
;
3274 /* Search thru overlays_after for where to put it. */
3276 for (other
= buf
->overlays_after
; other
;
3277 other_prev
= other
, other
= other
->next
)
3279 Lisp_Object otherbeg
, otheroverlay
;
3281 XSETMISC (otheroverlay
, other
);
3282 eassert (OVERLAY_VALID (otheroverlay
));
3284 otherbeg
= OVERLAY_START (otheroverlay
);
3285 if (OVERLAY_POSITION (otherbeg
) >= where
)
3289 /* Add TAIL to overlays_after before OTHER. */
3292 other_prev
->next
= tail
;
3294 buf
->overlays_after
= tail
;
3298 /* We've reached the things that should stay in overlays_before.
3299 All the rest of overlays_before must end even earlier,
3304 /* See if anything in overlays_after should be in overlays_before. */
3306 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3309 XSETMISC (overlay
, tail
);
3311 /* If the overlay is not valid, get rid of it. */
3312 if (!OVERLAY_VALID (overlay
))
3317 /* Splice the cons cell TAIL out of overlays_after. */
3321 buf
->overlays_after
= next
;
3327 beg
= OVERLAY_START (overlay
);
3328 end
= OVERLAY_END (overlay
);
3330 /* Stop looking, when we know that nothing further
3331 can possibly end before POS. */
3332 if (OVERLAY_POSITION (beg
) > pos
)
3335 if (OVERLAY_POSITION (end
) <= pos
)
3337 /* OVERLAY needs to be moved. */
3338 int where
= OVERLAY_POSITION (end
);
3339 struct Lisp_Overlay
*other
, *other_prev
;
3341 /* Splice the cons cell TAIL out of overlays_after. */
3345 buf
->overlays_after
= next
;
3347 /* Search thru overlays_before for where to put it. */
3349 for (other
= buf
->overlays_before
; other
;
3350 other_prev
= other
, other
= other
->next
)
3352 Lisp_Object otherend
, otheroverlay
;
3354 XSETMISC (otheroverlay
, other
);
3355 eassert (OVERLAY_VALID (otheroverlay
));
3357 otherend
= OVERLAY_END (otheroverlay
);
3358 if (OVERLAY_POSITION (otherend
) <= where
)
3362 /* Add TAIL to overlays_before before OTHER. */
3365 other_prev
->next
= tail
;
3367 buf
->overlays_before
= tail
;
3372 buf
->overlay_center
= pos
;
3376 adjust_overlays_for_insert (pos
, length
)
3380 /* After an insertion, the lists are still sorted properly,
3381 but we may need to update the value of the overlay center. */
3382 if (current_buffer
->overlay_center
>= pos
)
3383 current_buffer
->overlay_center
+= length
;
3387 adjust_overlays_for_delete (pos
, length
)
3391 if (current_buffer
->overlay_center
< pos
)
3392 /* The deletion was to our right. No change needed; the before- and
3393 after-lists are still consistent. */
3395 else if (current_buffer
->overlay_center
> pos
+ length
)
3396 /* The deletion was to our left. We need to adjust the center value
3397 to account for the change in position, but the lists are consistent
3398 given the new value. */
3399 current_buffer
->overlay_center
-= length
;
3401 /* We're right in the middle. There might be things on the after-list
3402 that now belong on the before-list. Recentering will move them,
3403 and also update the center point. */
3404 recenter_overlay_lists (current_buffer
, pos
);
3407 /* Fix up overlays that were garbled as a result of permuting markers
3408 in the range START through END. Any overlay with at least one
3409 endpoint in this range will need to be unlinked from the overlay
3410 list and reinserted in its proper place.
3411 Such an overlay might even have negative size at this point.
3412 If so, we'll make the overlay empty. */
3414 fix_start_end_in_overlays (start
, end
)
3415 register int start
, end
;
3417 Lisp_Object overlay
;
3418 struct Lisp_Overlay
*before_list
, *after_list
;
3419 /* These are either nil, indicating that before_list or after_list
3420 should be assigned, or the cons cell the cdr of which should be
3422 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3423 /* 'Parent', likewise, indicates a cons cell or
3424 current_buffer->overlays_before or overlays_after, depending
3425 which loop we're in. */
3426 struct Lisp_Overlay
*tail
, *parent
;
3427 int startpos
, endpos
;
3429 /* This algorithm shifts links around instead of consing and GCing.
3430 The loop invariant is that before_list (resp. after_list) is a
3431 well-formed list except that its last element, the CDR of beforep
3432 (resp. afterp) if beforep (afterp) isn't nil or before_list
3433 (after_list) if it is, is still uninitialized. So it's not a bug
3434 that before_list isn't initialized, although it may look
3436 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3438 XSETMISC (overlay
, tail
);
3440 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3441 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3443 /* If the overlay is backwards, make it empty. */
3444 if (endpos
< startpos
)
3447 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3455 || (startpos
>= start
&& startpos
< end
))
3457 /* Add it to the end of the wrong list. Later on,
3458 recenter_overlay_lists will move it to the right place. */
3459 if (endpos
< current_buffer
->overlay_center
)
3464 afterp
->next
= tail
;
3472 beforep
->next
= tail
;
3476 current_buffer
->overlays_before
= tail
->next
;
3478 parent
->next
= tail
->next
;
3482 parent
= tail
, tail
= parent
->next
;
3484 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3486 XSETMISC (overlay
, tail
);
3488 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3489 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3491 /* If the overlay is backwards, make it empty. */
3492 if (endpos
< startpos
)
3495 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3499 if (startpos
>= end
)
3502 if (startpos
>= start
3503 || (endpos
>= start
&& endpos
< end
))
3505 if (endpos
< current_buffer
->overlay_center
)
3510 afterp
->next
= tail
;
3518 beforep
->next
= tail
;
3522 current_buffer
->overlays_after
= tail
->next
;
3524 parent
->next
= tail
->next
;
3528 parent
= tail
, tail
= parent
->next
;
3531 /* Splice the constructed (wrong) lists into the buffer's lists,
3532 and let the recenter function make it sane again. */
3535 beforep
->next
= current_buffer
->overlays_before
;
3536 current_buffer
->overlays_before
= before_list
;
3538 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3542 afterp
->next
= current_buffer
->overlays_after
;
3543 current_buffer
->overlays_after
= after_list
;
3545 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3548 /* We have two types of overlay: the one whose ending marker is
3549 after-insertion-marker (this is the usual case) and the one whose
3550 ending marker is before-insertion-marker. When `overlays_before'
3551 contains overlays of the latter type and the former type in this
3552 order and both overlays end at inserting position, inserting a text
3553 increases only the ending marker of the latter type, which results
3554 in incorrect ordering of `overlays_before'.
3556 This function fixes ordering of overlays in the slot
3557 `overlays_before' of the buffer *BP. Before the insertion, `point'
3558 was at PREV, and now is at POS. */
3561 fix_overlays_before (bp
, prev
, pos
)
3563 EMACS_INT prev
, pos
;
3565 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3566 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3570 /* After the insertion, the several overlays may be in incorrect
3571 order. The possibility is that, in the list `overlays_before',
3572 an overlay which ends at POS appears after an overlay which ends
3573 at PREV. Since POS is greater than PREV, we must fix the
3574 ordering of these overlays, by moving overlays ends at POS before
3575 the overlays ends at PREV. */
3577 /* At first, find a place where disordered overlays should be linked
3578 in. It is where an overlay which end before POS exists. (i.e. an
3579 overlay whose ending marker is after-insertion-marker if disorder
3582 && (XSETMISC (tem
, tail
),
3583 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3589 /* If we don't find such an overlay,
3590 or the found one ends before PREV,
3591 or the found one is the last one in the list,
3592 we don't have to fix anything. */
3593 if (!tail
|| end
< prev
|| !tail
->next
)
3596 right_pair
= parent
;
3600 /* Now, end position of overlays in the list TAIL should be before
3601 or equal to PREV. In the loop, an overlay which ends at POS is
3602 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3603 we found an overlay which ends before PREV, the remaining
3604 overlays are in correct order. */
3607 XSETMISC (tem
, tail
);
3608 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3611 { /* This overlay is disordered. */
3612 struct Lisp_Overlay
*found
= tail
;
3614 /* Unlink the found overlay. */
3616 parent
->next
= tail
;
3617 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3618 and link it into the right place. */
3621 found
->next
= bp
->overlays_before
;
3622 bp
->overlays_before
= found
;
3626 found
->next
= right_pair
->next
;
3627 right_pair
->next
= found
;
3630 else if (end
== prev
)
3635 else /* No more disordered overlay. */
3640 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3641 doc
: /* Return t if OBJECT is an overlay. */)
3645 return (OVERLAYP (object
) ? Qt
: Qnil
);
3648 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3649 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3650 If omitted, BUFFER defaults to the current buffer.
3651 BEG and END may be integers or markers.
3652 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3653 for the front of the overlay advance when text is inserted there
3654 \(which means the text *is not* included in the overlay).
3655 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3656 for the rear of the overlay advance when text is inserted there
3657 \(which means the text *is* included in the overlay). */)
3658 (beg
, end
, buffer
, front_advance
, rear_advance
)
3659 Lisp_Object beg
, end
, buffer
;
3660 Lisp_Object front_advance
, rear_advance
;
3662 Lisp_Object overlay
;
3666 XSETBUFFER (buffer
, current_buffer
);
3668 CHECK_BUFFER (buffer
);
3670 && ! EQ (Fmarker_buffer (beg
), buffer
))
3671 error ("Marker points into wrong buffer");
3673 && ! EQ (Fmarker_buffer (end
), buffer
))
3674 error ("Marker points into wrong buffer");
3676 CHECK_NUMBER_COERCE_MARKER (beg
);
3677 CHECK_NUMBER_COERCE_MARKER (end
);
3679 if (XINT (beg
) > XINT (end
))
3682 temp
= beg
; beg
= end
; end
= temp
;
3685 b
= XBUFFER (buffer
);
3687 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3688 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3690 if (!NILP (front_advance
))
3691 XMARKER (beg
)->insertion_type
= 1;
3692 if (!NILP (rear_advance
))
3693 XMARKER (end
)->insertion_type
= 1;
3695 overlay
= allocate_misc ();
3696 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3697 XOVERLAY (overlay
)->start
= beg
;
3698 XOVERLAY (overlay
)->end
= end
;
3699 XOVERLAY (overlay
)->plist
= Qnil
;
3700 XOVERLAY (overlay
)->next
= NULL
;
3702 /* Put the new overlay on the wrong list. */
3703 end
= OVERLAY_END (overlay
);
3704 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3706 if (b
->overlays_after
)
3707 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3708 b
->overlays_after
= XOVERLAY (overlay
);
3712 if (b
->overlays_before
)
3713 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3714 b
->overlays_before
= XOVERLAY (overlay
);
3717 /* This puts it in the right list, and in the right order. */
3718 recenter_overlay_lists (b
, b
->overlay_center
);
3720 /* We don't need to redisplay the region covered by the overlay, because
3721 the overlay has no properties at the moment. */
3726 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3729 modify_overlay (buf
, start
, end
)
3731 EMACS_INT start
, end
;
3740 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3742 /* If this is a buffer not in the selected window,
3743 we must do other windows. */
3744 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3745 windows_or_buffers_changed
= 1;
3746 /* If multiple windows show this buffer, we must do other windows. */
3747 else if (buffer_shared
> 1)
3748 windows_or_buffers_changed
= 1;
3749 /* If we modify an overlay at the end of the buffer, we cannot
3750 be sure that window end is still valid. */
3751 else if (end
>= ZV
&& start
<= ZV
)
3752 windows_or_buffers_changed
= 1;
3754 ++BUF_OVERLAY_MODIFF (buf
);
3758 Lisp_Object
Fdelete_overlay ();
3760 static struct Lisp_Overlay
*
3761 unchain_overlay (list
, overlay
)
3762 struct Lisp_Overlay
*list
, *overlay
;
3764 struct Lisp_Overlay
*tmp
, *prev
;
3765 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3769 prev
->next
= tmp
->next
;
3772 overlay
->next
= NULL
;
3778 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3779 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3780 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3781 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3783 (overlay
, beg
, end
, buffer
)
3784 Lisp_Object overlay
, beg
, end
, buffer
;
3786 struct buffer
*b
, *ob
;
3787 Lisp_Object obuffer
;
3788 int count
= SPECPDL_INDEX ();
3790 CHECK_OVERLAY (overlay
);
3792 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3794 XSETBUFFER (buffer
, current_buffer
);
3795 CHECK_BUFFER (buffer
);
3798 && ! EQ (Fmarker_buffer (beg
), buffer
))
3799 error ("Marker points into wrong buffer");
3801 && ! EQ (Fmarker_buffer (end
), buffer
))
3802 error ("Marker points into wrong buffer");
3804 CHECK_NUMBER_COERCE_MARKER (beg
);
3805 CHECK_NUMBER_COERCE_MARKER (end
);
3807 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3808 return Fdelete_overlay (overlay
);
3810 if (XINT (beg
) > XINT (end
))
3813 temp
= beg
; beg
= end
; end
= temp
;
3816 specbind (Qinhibit_quit
, Qt
);
3818 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3819 b
= XBUFFER (buffer
);
3820 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3822 /* If the overlay has changed buffers, do a thorough redisplay. */
3823 if (!EQ (buffer
, obuffer
))
3825 /* Redisplay where the overlay was. */
3826 if (!NILP (obuffer
))
3831 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3832 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3834 modify_overlay (ob
, o_beg
, o_end
);
3837 /* Redisplay where the overlay is going to be. */
3838 modify_overlay (b
, XINT (beg
), XINT (end
));
3841 /* Redisplay the area the overlay has just left, or just enclosed. */
3845 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3846 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3848 if (o_beg
== XINT (beg
))
3849 modify_overlay (b
, o_end
, XINT (end
));
3850 else if (o_end
== XINT (end
))
3851 modify_overlay (b
, o_beg
, XINT (beg
));
3854 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3855 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3856 modify_overlay (b
, o_beg
, o_end
);
3860 if (!NILP (obuffer
))
3863 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3865 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3866 eassert (XOVERLAY (overlay
)->next
== NULL
);
3869 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3870 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3872 /* Put the overlay on the wrong list. */
3873 end
= OVERLAY_END (overlay
);
3874 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3876 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3877 b
->overlays_after
= XOVERLAY (overlay
);
3881 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3882 b
->overlays_before
= XOVERLAY (overlay
);
3885 /* This puts it in the right list, and in the right order. */
3886 recenter_overlay_lists (b
, b
->overlay_center
);
3888 return unbind_to (count
, overlay
);
3891 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3892 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3894 Lisp_Object overlay
;
3898 int count
= SPECPDL_INDEX ();
3900 CHECK_OVERLAY (overlay
);
3902 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3906 b
= XBUFFER (buffer
);
3907 specbind (Qinhibit_quit
, Qt
);
3909 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3910 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3911 eassert (XOVERLAY (overlay
)->next
== NULL
);
3913 marker_position (OVERLAY_START (overlay
)),
3914 marker_position (OVERLAY_END (overlay
)));
3915 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3916 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3918 /* When deleting an overlay with before or after strings, turn off
3919 display optimizations for the affected buffer, on the basis that
3920 these strings may contain newlines. This is easier to do than to
3921 check for that situation during redisplay. */
3922 if (!windows_or_buffers_changed
3923 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3924 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3925 b
->prevent_redisplay_optimizations_p
= 1;
3927 return unbind_to (count
, Qnil
);
3930 /* Overlay dissection functions. */
3932 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3933 doc
: /* Return the position at which OVERLAY starts. */)
3935 Lisp_Object overlay
;
3937 CHECK_OVERLAY (overlay
);
3939 return (Fmarker_position (OVERLAY_START (overlay
)));
3942 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3943 doc
: /* Return the position at which OVERLAY ends. */)
3945 Lisp_Object overlay
;
3947 CHECK_OVERLAY (overlay
);
3949 return (Fmarker_position (OVERLAY_END (overlay
)));
3952 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3953 doc
: /* Return the buffer OVERLAY belongs to.
3954 Return nil if OVERLAY has been deleted. */)
3956 Lisp_Object overlay
;
3958 CHECK_OVERLAY (overlay
);
3960 return Fmarker_buffer (OVERLAY_START (overlay
));
3963 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3964 doc
: /* Return a list of the properties on OVERLAY.
3965 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3968 Lisp_Object overlay
;
3970 CHECK_OVERLAY (overlay
);
3972 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3976 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3977 doc
: /* Return a list of the overlays that contain the character at POS. */)
3982 Lisp_Object
*overlay_vec
;
3986 CHECK_NUMBER_COERCE_MARKER (pos
);
3989 /* We can't use alloca here because overlays_at can call xrealloc. */
3990 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3992 /* Put all the overlays we want in a vector in overlay_vec.
3993 Store the length in len. */
3994 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3995 (int *) 0, (int *) 0, 0);
3997 /* Make a list of them all. */
3998 result
= Flist (noverlays
, overlay_vec
);
4000 xfree (overlay_vec
);
4004 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
4005 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
4006 Overlap means that at least one character is contained within the overlay
4007 and also contained within the specified region.
4008 Empty overlays are included in the result if they are located at BEG
4009 or between BEG and END. */)
4011 Lisp_Object beg
, end
;
4014 Lisp_Object
*overlay_vec
;
4018 CHECK_NUMBER_COERCE_MARKER (beg
);
4019 CHECK_NUMBER_COERCE_MARKER (end
);
4022 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4024 /* Put all the overlays we want in a vector in overlay_vec.
4025 Store the length in len. */
4026 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
4027 (int *) 0, (int *) 0);
4029 /* Make a list of them all. */
4030 result
= Flist (noverlays
, overlay_vec
);
4032 xfree (overlay_vec
);
4036 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
4038 doc
: /* Return the next position after POS where an overlay starts or ends.
4039 If there are no overlay boundaries from POS to (point-max),
4040 the value is (point-max). */)
4046 Lisp_Object
*overlay_vec
;
4050 CHECK_NUMBER_COERCE_MARKER (pos
);
4053 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4055 /* Put all the overlays we want in a vector in overlay_vec.
4056 Store the length in len.
4057 endpos gets the position where the next overlay starts. */
4058 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4059 &endpos
, (int *) 0, 1);
4061 /* If any of these overlays ends before endpos,
4062 use its ending point instead. */
4063 for (i
= 0; i
< noverlays
; i
++)
4068 oend
= OVERLAY_END (overlay_vec
[i
]);
4069 oendpos
= OVERLAY_POSITION (oend
);
4070 if (oendpos
< endpos
)
4074 xfree (overlay_vec
);
4075 return make_number (endpos
);
4078 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
4079 Sprevious_overlay_change
, 1, 1, 0,
4080 doc
: /* Return the previous position before POS where an overlay starts or ends.
4081 If there are no overlay boundaries from (point-min) to POS,
4082 the value is (point-min). */)
4088 Lisp_Object
*overlay_vec
;
4091 CHECK_NUMBER_COERCE_MARKER (pos
);
4093 /* At beginning of buffer, we know the answer;
4094 avoid bug subtracting 1 below. */
4095 if (XINT (pos
) == BEGV
)
4099 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4101 /* Put all the overlays we want in a vector in overlay_vec.
4102 Store the length in len.
4103 prevpos gets the position of the previous change. */
4104 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4105 (int *) 0, &prevpos
, 1);
4107 xfree (overlay_vec
);
4108 return make_number (prevpos
);
4111 /* These functions are for debugging overlays. */
4113 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4114 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4115 The car has all the overlays before the overlay center;
4116 the cdr has all the overlays after the overlay center.
4117 Recentering overlays moves overlays between these lists.
4118 The lists you get are copies, so that changing them has no effect.
4119 However, the overlays you get are the real objects that the buffer uses. */)
4122 struct Lisp_Overlay
*ol
;
4123 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4124 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4127 before
= Fcons (tmp
, before
);
4129 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4132 after
= Fcons (tmp
, after
);
4134 return Fcons (Fnreverse (before
), Fnreverse (after
));
4137 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4138 doc
: /* Recenter the overlays of the current buffer around position POS.
4139 That makes overlay lookup faster for positions near POS (but perhaps slower
4140 for positions far away from POS). */)
4144 CHECK_NUMBER_COERCE_MARKER (pos
);
4146 recenter_overlay_lists (current_buffer
, XINT (pos
));
4150 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4151 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4153 Lisp_Object overlay
, prop
;
4155 CHECK_OVERLAY (overlay
);
4156 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4159 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4160 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4161 (overlay
, prop
, value
)
4162 Lisp_Object overlay
, prop
, value
;
4164 Lisp_Object tail
, buffer
;
4167 CHECK_OVERLAY (overlay
);
4169 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4171 for (tail
= XOVERLAY (overlay
)->plist
;
4172 CONSP (tail
) && CONSP (XCDR (tail
));
4173 tail
= XCDR (XCDR (tail
)))
4174 if (EQ (XCAR (tail
), prop
))
4176 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4177 XSETCAR (XCDR (tail
), value
);
4180 /* It wasn't in the list, so add it to the front. */
4181 changed
= !NILP (value
);
4182 XOVERLAY (overlay
)->plist
4183 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4185 if (! NILP (buffer
))
4188 modify_overlay (XBUFFER (buffer
),
4189 marker_position (OVERLAY_START (overlay
)),
4190 marker_position (OVERLAY_END (overlay
)));
4191 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4192 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4193 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4194 Fdelete_overlay (overlay
);
4200 /* Subroutine of report_overlay_modification. */
4202 /* Lisp vector holding overlay hook functions to call.
4203 Vector elements come in pairs.
4204 Each even-index element is a list of hook functions.
4205 The following odd-index element is the overlay they came from.
4207 Before the buffer change, we fill in this vector
4208 as we call overlay hook functions.
4209 After the buffer change, we get the functions to call from this vector.
4210 This way we always call the same functions before and after the change. */
4211 static Lisp_Object last_overlay_modification_hooks
;
4213 /* Number of elements actually used in last_overlay_modification_hooks. */
4214 static int last_overlay_modification_hooks_used
;
4216 /* Add one functionlist/overlay pair
4217 to the end of last_overlay_modification_hooks. */
4220 add_overlay_mod_hooklist (functionlist
, overlay
)
4221 Lisp_Object functionlist
, overlay
;
4223 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4225 if (last_overlay_modification_hooks_used
== oldsize
)
4226 last_overlay_modification_hooks
= larger_vector
4227 (last_overlay_modification_hooks
, oldsize
* 2, Qnil
);
4228 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = functionlist
;
4229 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = overlay
;
4232 /* Run the modification-hooks of overlays that include
4233 any part of the text in START to END.
4234 If this change is an insertion, also
4235 run the insert-before-hooks of overlay starting at END,
4236 and the insert-after-hooks of overlay ending at START.
4238 This is called both before and after the modification.
4239 AFTER is nonzero when we call after the modification.
4241 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4242 When AFTER is nonzero, they are the start position,
4243 the position after the inserted new text,
4244 and the length of deleted or replaced old text. */
4247 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4248 Lisp_Object start
, end
;
4250 Lisp_Object arg1
, arg2
, arg3
;
4252 Lisp_Object prop
, overlay
;
4253 struct Lisp_Overlay
*tail
;
4254 /* 1 if this change is an insertion. */
4255 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4256 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4261 /* We used to run the functions as soon as we found them and only register
4262 them in last_overlay_modification_hooks for the purpose of the `after'
4263 case. But running elisp code as we traverse the list of overlays is
4264 painful because the list can be modified by the elisp code so we had to
4265 copy at several places. We now simply do a read-only traversal that
4266 only collects the functions to run and we run them afterwards. It's
4267 simpler, especially since all the code was already there. -stef */
4271 /* We are being called before a change.
4272 Scan the overlays to find the functions to call. */
4273 last_overlay_modification_hooks_used
= 0;
4274 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4276 int startpos
, endpos
;
4277 Lisp_Object ostart
, oend
;
4279 XSETMISC (overlay
, tail
);
4281 ostart
= OVERLAY_START (overlay
);
4282 oend
= OVERLAY_END (overlay
);
4283 endpos
= OVERLAY_POSITION (oend
);
4284 if (XFASTINT (start
) > endpos
)
4286 startpos
= OVERLAY_POSITION (ostart
);
4287 if (insertion
&& (XFASTINT (start
) == startpos
4288 || XFASTINT (end
) == startpos
))
4290 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4292 add_overlay_mod_hooklist (prop
, overlay
);
4294 if (insertion
&& (XFASTINT (start
) == endpos
4295 || XFASTINT (end
) == endpos
))
4297 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4299 add_overlay_mod_hooklist (prop
, overlay
);
4301 /* Test for intersecting intervals. This does the right thing
4302 for both insertion and deletion. */
4303 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4305 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4307 add_overlay_mod_hooklist (prop
, overlay
);
4311 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4313 int startpos
, endpos
;
4314 Lisp_Object ostart
, oend
;
4316 XSETMISC (overlay
, tail
);
4318 ostart
= OVERLAY_START (overlay
);
4319 oend
= OVERLAY_END (overlay
);
4320 startpos
= OVERLAY_POSITION (ostart
);
4321 endpos
= OVERLAY_POSITION (oend
);
4322 if (XFASTINT (end
) < startpos
)
4324 if (insertion
&& (XFASTINT (start
) == startpos
4325 || XFASTINT (end
) == startpos
))
4327 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4329 add_overlay_mod_hooklist (prop
, overlay
);
4331 if (insertion
&& (XFASTINT (start
) == endpos
4332 || XFASTINT (end
) == endpos
))
4334 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4336 add_overlay_mod_hooklist (prop
, overlay
);
4338 /* Test for intersecting intervals. This does the right thing
4339 for both insertion and deletion. */
4340 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4342 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4344 add_overlay_mod_hooklist (prop
, overlay
);
4349 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4351 /* Call the functions recorded in last_overlay_modification_hooks.
4352 First copy the vector contents, in case some of these hooks
4353 do subsequent modification of the buffer. */
4354 int size
= last_overlay_modification_hooks_used
;
4355 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4358 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4359 copy
, size
* sizeof (Lisp_Object
));
4361 gcpro1
.nvars
= size
;
4363 for (i
= 0; i
< size
;)
4365 Lisp_Object prop
, overlay
;
4367 overlay
= copy
[i
++];
4368 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4375 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4376 Lisp_Object list
, overlay
;
4378 Lisp_Object arg1
, arg2
, arg3
;
4380 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4382 GCPRO4 (list
, arg1
, arg2
, arg3
);
4384 while (CONSP (list
))
4387 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4389 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4395 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4398 evaporate_overlays (pos
)
4401 Lisp_Object overlay
, hit_list
;
4402 struct Lisp_Overlay
*tail
;
4405 if (pos
<= current_buffer
->overlay_center
)
4406 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4409 XSETMISC (overlay
, tail
);
4410 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4413 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4414 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4415 hit_list
= Fcons (overlay
, hit_list
);
4418 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4421 XSETMISC (overlay
, tail
);
4422 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4425 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4426 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4427 hit_list
= Fcons (overlay
, hit_list
);
4429 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4430 Fdelete_overlay (XCAR (hit_list
));
4433 /* Somebody has tried to store a value with an unacceptable type
4434 in the slot with offset OFFSET. */
4437 buffer_slot_type_mismatch (offset
)
4443 switch (XINT (PER_BUFFER_TYPE (offset
)))
4446 type_name
= "integers";
4450 type_name
= "strings";
4454 type_name
= "symbols";
4461 sym
= PER_BUFFER_SYMBOL (offset
);
4462 error ("Only %s should be stored in the buffer-local variable %s",
4463 type_name
, SDATA (SYMBOL_NAME (sym
)));
4467 /***********************************************************************
4468 Allocation with mmap
4469 ***********************************************************************/
4471 #ifdef USE_MMAP_FOR_BUFFERS
4473 #include <sys/types.h>
4474 #include <sys/mman.h>
4477 #ifdef MAP_ANONYMOUS
4478 #define MAP_ANON MAP_ANONYMOUS
4485 #define MAP_FAILED ((void *) -1)
4498 /* Memory is allocated in regions which are mapped using mmap(2).
4499 The current implementation lets the system select mapped
4500 addresses; we're not using MAP_FIXED in general, except when
4501 trying to enlarge regions.
4503 Each mapped region starts with a mmap_region structure, the user
4504 area starts after that structure, aligned to MEM_ALIGN.
4506 +-----------------------+
4507 | struct mmap_info + |
4509 +-----------------------+
4513 +-----------------------+ */
4517 /* User-specified size. */
4518 size_t nbytes_specified
;
4520 /* Number of bytes mapped */
4521 size_t nbytes_mapped
;
4523 /* Pointer to the location holding the address of the memory
4524 allocated with the mmap'd block. The variable actually points
4525 after this structure. */
4528 /* Next and previous in list of all mmap'd regions. */
4529 struct mmap_region
*next
, *prev
;
4532 /* Doubly-linked list of mmap'd regions. */
4534 static struct mmap_region
*mmap_regions
;
4536 /* File descriptor for mmap. If we don't have anonymous mapping,
4537 /dev/zero will be opened on it. */
4541 /* Temporary storage for mmap_set_vars, see there. */
4543 static struct mmap_region
*mmap_regions_1
;
4544 static int mmap_fd_1
;
4546 /* Page size on this system. */
4548 static int mmap_page_size
;
4550 /* 1 means mmap has been intialized. */
4552 static int mmap_initialized_p
;
4554 /* Value is X rounded up to the next multiple of N. */
4556 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4558 /* Size of mmap_region structure plus padding. */
4560 #define MMAP_REGION_STRUCT_SIZE \
4561 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4563 /* Given a pointer P to the start of the user-visible part of a mapped
4564 region, return a pointer to the start of the region. */
4566 #define MMAP_REGION(P) \
4567 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4569 /* Given a pointer P to the start of a mapped region, return a pointer
4570 to the start of the user-visible part of the region. */
4572 #define MMAP_USER_AREA(P) \
4573 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4575 #define MEM_ALIGN sizeof (double)
4577 /* Predicate returning true if part of the address range [START .. END]
4578 is currently mapped. Used to prevent overwriting an existing
4581 Default is to conservativly assume the address range is occupied by
4582 something else. This can be overridden by system configuration
4583 files if system-specific means to determine this exists. */
4585 #ifndef MMAP_ALLOCATED_P
4586 #define MMAP_ALLOCATED_P(start, end) 1
4589 /* Function prototypes. */
4591 static int mmap_free_1
P_ ((struct mmap_region
*));
4592 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4593 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4594 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4595 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4596 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4597 static void mmap_init
P_ ((void));
4600 /* Return a region overlapping address range START...END, or null if
4601 none. END is not including, i.e. the last byte in the range
4604 static struct mmap_region
*
4605 mmap_find (start
, end
)
4606 POINTER_TYPE
*start
, *end
;
4608 struct mmap_region
*r
;
4609 char *s
= (char *) start
, *e
= (char *) end
;
4611 for (r
= mmap_regions
; r
; r
= r
->next
)
4613 char *rstart
= (char *) r
;
4614 char *rend
= rstart
+ r
->nbytes_mapped
;
4616 if (/* First byte of range, i.e. START, in this region? */
4617 (s
>= rstart
&& s
< rend
)
4618 /* Last byte of range, i.e. END - 1, in this region? */
4619 || (e
> rstart
&& e
<= rend
)
4620 /* First byte of this region in the range? */
4621 || (rstart
>= s
&& rstart
< e
)
4622 /* Last byte of this region in the range? */
4623 || (rend
> s
&& rend
<= e
))
4631 /* Unmap a region. P is a pointer to the start of the user-araa of
4632 the region. Value is non-zero if successful. */
4636 struct mmap_region
*r
;
4639 r
->next
->prev
= r
->prev
;
4641 r
->prev
->next
= r
->next
;
4643 mmap_regions
= r
->next
;
4645 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4647 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4655 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4656 Value is non-zero if successful. */
4659 mmap_enlarge (r
, npages
)
4660 struct mmap_region
*r
;
4663 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4669 /* Unmap pages at the end of the region. */
4670 nbytes
= - npages
* mmap_page_size
;
4671 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4672 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4675 r
->nbytes_mapped
-= nbytes
;
4679 else if (npages
> 0)
4681 nbytes
= npages
* mmap_page_size
;
4683 /* Try to map additional pages at the end of the region. We
4684 cannot do this if the address range is already occupied by
4685 something else because mmap deletes any previous mapping.
4686 I'm not sure this is worth doing, let's see. */
4687 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4691 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4692 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4693 if (p
== MAP_FAILED
)
4694 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4695 else if (p
!= (POINTER_TYPE
*) region_end
)
4697 /* Kernels are free to choose a different address. In
4698 that case, unmap what we've mapped above; we have
4700 if (munmap (p
, nbytes
) == -1)
4701 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4705 r
->nbytes_mapped
+= nbytes
;
4715 /* Set or reset variables holding references to mapped regions. If
4716 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4717 non-zero, set all variables to the start of the user-areas
4720 This function is called from Fdump_emacs to ensure that the dumped
4721 Emacs doesn't contain references to memory that won't be mapped
4722 when Emacs starts. */
4725 mmap_set_vars (restore_p
)
4728 struct mmap_region
*r
;
4732 mmap_regions
= mmap_regions_1
;
4733 mmap_fd
= mmap_fd_1
;
4734 for (r
= mmap_regions
; r
; r
= r
->next
)
4735 *r
->var
= MMAP_USER_AREA (r
);
4739 for (r
= mmap_regions
; r
; r
= r
->next
)
4741 mmap_regions_1
= mmap_regions
;
4742 mmap_regions
= NULL
;
4743 mmap_fd_1
= mmap_fd
;
4749 /* Allocate a block of storage large enough to hold NBYTES bytes of
4750 data. A pointer to the data is returned in *VAR. VAR is thus the
4751 address of some variable which will use the data area.
4753 The allocation of 0 bytes is valid.
4755 If we can't allocate the necessary memory, set *VAR to null, and
4758 static POINTER_TYPE
*
4759 mmap_alloc (var
, nbytes
)
4768 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4769 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4772 if (p
== MAP_FAILED
)
4774 if (errno
!= ENOMEM
)
4775 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4780 struct mmap_region
*r
= (struct mmap_region
*) p
;
4782 r
->nbytes_specified
= nbytes
;
4783 r
->nbytes_mapped
= map
;
4786 r
->next
= mmap_regions
;
4791 p
= MMAP_USER_AREA (p
);
4798 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4799 resize it to size NBYTES. Change *VAR to reflect the new block,
4800 and return this value. If more memory cannot be allocated, then
4801 leave *VAR unchanged, and return null. */
4803 static POINTER_TYPE
*
4804 mmap_realloc (var
, nbytes
)
4808 POINTER_TYPE
*result
;
4813 result
= mmap_alloc (var
, nbytes
);
4814 else if (nbytes
== 0)
4817 result
= mmap_alloc (var
, nbytes
);
4821 struct mmap_region
*r
= MMAP_REGION (*var
);
4822 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4827 POINTER_TYPE
*old_ptr
= *var
;
4829 /* Try to map additional pages at the end of the region.
4830 If that fails, allocate a new region, copy data
4831 from the old region, then free it. */
4832 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4835 r
->nbytes_specified
= nbytes
;
4836 *var
= result
= old_ptr
;
4838 else if (mmap_alloc (var
, nbytes
))
4840 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4841 mmap_free_1 (MMAP_REGION (old_ptr
));
4843 r
= MMAP_REGION (result
);
4844 r
->nbytes_specified
= nbytes
;
4852 else if (room
- nbytes
>= mmap_page_size
)
4854 /* Shrinking by at least a page. Let's give some
4855 memory back to the system.
4857 The extra parens are to make the division happens first,
4858 on positive values, so we know it will round towards
4860 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4862 r
->nbytes_specified
= nbytes
;
4866 /* Leave it alone. */
4868 r
->nbytes_specified
= nbytes
;
4876 /* Free a block of relocatable storage whose data is pointed to by
4877 PTR. Store 0 in *PTR to show there's no block allocated. */
4887 mmap_free_1 (MMAP_REGION (*var
));
4893 /* Perform necessary intializations for the use of mmap. */
4899 /* The value of mmap_fd is initially 0 in temacs, and -1
4900 in a dumped Emacs. */
4903 /* No anonymous mmap -- we need the file descriptor. */
4904 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4906 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4908 #endif /* MAP_ANON == 0 */
4910 if (mmap_initialized_p
)
4912 mmap_initialized_p
= 1;
4918 mmap_page_size
= getpagesize ();
4921 #endif /* USE_MMAP_FOR_BUFFERS */
4925 /***********************************************************************
4926 Buffer-text Allocation
4927 ***********************************************************************/
4930 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4931 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4932 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4933 #endif /* REL_ALLOC */
4936 /* Allocate NBYTES bytes for buffer B's text buffer. */
4939 alloc_buffer_text (b
, nbytes
)
4946 #if defined USE_MMAP_FOR_BUFFERS
4947 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4948 #elif defined REL_ALLOC
4949 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4951 p
= xmalloc (nbytes
);
4960 b
->text
->beg
= (unsigned char *) p
;
4964 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4968 enlarge_buffer_text (b
, delta
)
4973 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4976 #if defined USE_MMAP_FOR_BUFFERS
4977 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4978 #elif defined REL_ALLOC
4979 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4981 p
= xrealloc (b
->text
->beg
, nbytes
);
4990 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4995 /* Free buffer B's text buffer. */
4998 free_buffer_text (b
)
5003 #if defined USE_MMAP_FOR_BUFFERS
5004 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
5005 #elif defined REL_ALLOC
5006 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
5008 xfree (b
->text
->beg
);
5011 BUF_BEG_ADDR (b
) = NULL
;
5017 /***********************************************************************
5019 ***********************************************************************/
5026 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
5028 /* Make sure all markable slots in buffer_defaults
5029 are initialized reasonably, so mark_buffer won't choke. */
5030 reset_buffer (&buffer_defaults
);
5031 reset_buffer_local_variables (&buffer_defaults
, 1);
5032 reset_buffer (&buffer_local_symbols
);
5033 reset_buffer_local_variables (&buffer_local_symbols
, 1);
5034 /* Prevent GC from getting confused. */
5035 buffer_defaults
.text
= &buffer_defaults
.own_text
;
5036 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
5037 BUF_INTERVALS (&buffer_defaults
) = 0;
5038 BUF_INTERVALS (&buffer_local_symbols
) = 0;
5039 XSETPVECTYPE (&buffer_defaults
, PVEC_BUFFER
);
5040 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
5041 XSETPVECTYPE (&buffer_local_symbols
, PVEC_BUFFER
);
5042 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
5044 /* Set up the default values of various buffer slots. */
5045 /* Must do these before making the first buffer! */
5047 /* real setup is done in bindings.el */
5048 buffer_defaults
.mode_line_format
= build_string ("%-");
5049 buffer_defaults
.header_line_format
= Qnil
;
5050 buffer_defaults
.abbrev_mode
= Qnil
;
5051 buffer_defaults
.overwrite_mode
= Qnil
;
5052 buffer_defaults
.case_fold_search
= Qt
;
5053 buffer_defaults
.auto_fill_function
= Qnil
;
5054 buffer_defaults
.selective_display
= Qnil
;
5056 buffer_defaults
.selective_display_ellipses
= Qt
;
5058 buffer_defaults
.abbrev_table
= Qnil
;
5059 buffer_defaults
.display_table
= Qnil
;
5060 buffer_defaults
.undo_list
= Qnil
;
5061 buffer_defaults
.mark_active
= Qnil
;
5062 buffer_defaults
.file_format
= Qnil
;
5063 buffer_defaults
.auto_save_file_format
= Qt
;
5064 buffer_defaults
.overlays_before
= NULL
;
5065 buffer_defaults
.overlays_after
= NULL
;
5066 buffer_defaults
.overlay_center
= BEG
;
5068 XSETFASTINT (buffer_defaults
.tab_width
, 8);
5069 buffer_defaults
.truncate_lines
= Qnil
;
5070 buffer_defaults
.ctl_arrow
= Qt
;
5071 buffer_defaults
.direction_reversed
= Qnil
;
5072 buffer_defaults
.cursor_type
= Qt
;
5073 buffer_defaults
.extra_line_spacing
= Qnil
;
5074 buffer_defaults
.cursor_in_non_selected_windows
= Qt
;
5077 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
5079 buffer_defaults
.enable_multibyte_characters
= Qt
;
5080 buffer_defaults
.buffer_file_coding_system
= Qnil
;
5081 XSETFASTINT (buffer_defaults
.fill_column
, 70);
5082 XSETFASTINT (buffer_defaults
.left_margin
, 0);
5083 buffer_defaults
.cache_long_line_scans
= Qnil
;
5084 buffer_defaults
.file_truename
= Qnil
;
5085 XSETFASTINT (buffer_defaults
.display_count
, 0);
5086 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
5087 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
5088 buffer_defaults
.left_fringe_width
= Qnil
;
5089 buffer_defaults
.right_fringe_width
= Qnil
;
5090 buffer_defaults
.fringes_outside_margins
= Qnil
;
5091 buffer_defaults
.scroll_bar_width
= Qnil
;
5092 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
5093 buffer_defaults
.indicate_empty_lines
= Qnil
;
5094 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
5095 buffer_defaults
.fringe_indicator_alist
= Qnil
;
5096 buffer_defaults
.fringe_cursor_alist
= Qnil
;
5097 buffer_defaults
.scroll_up_aggressively
= Qnil
;
5098 buffer_defaults
.scroll_down_aggressively
= Qnil
;
5099 buffer_defaults
.display_time
= Qnil
;
5101 /* Assign the local-flags to the slots that have default values.
5102 The local flag is a bit that is used in the buffer
5103 to say that it has its own local value for the slot.
5104 The local flag bits are in the local_var_flags slot of the buffer. */
5106 /* Nothing can work if this isn't true */
5107 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
5109 /* 0 means not a lisp var, -1 means always local, else mask */
5110 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
5111 XSETINT (buffer_local_flags
.filename
, -1);
5112 XSETINT (buffer_local_flags
.directory
, -1);
5113 XSETINT (buffer_local_flags
.backed_up
, -1);
5114 XSETINT (buffer_local_flags
.save_length
, -1);
5115 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
5116 XSETINT (buffer_local_flags
.read_only
, -1);
5117 XSETINT (buffer_local_flags
.major_mode
, -1);
5118 XSETINT (buffer_local_flags
.mode_name
, -1);
5119 XSETINT (buffer_local_flags
.undo_list
, -1);
5120 XSETINT (buffer_local_flags
.mark_active
, -1);
5121 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
5122 XSETINT (buffer_local_flags
.file_truename
, -1);
5123 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
5124 XSETINT (buffer_local_flags
.file_format
, -1);
5125 XSETINT (buffer_local_flags
.auto_save_file_format
, -1);
5126 XSETINT (buffer_local_flags
.display_count
, -1);
5127 XSETINT (buffer_local_flags
.display_time
, -1);
5128 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
5131 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
5132 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
5133 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5134 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5135 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5136 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5138 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5140 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5141 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5142 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5143 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5144 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5145 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5146 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5148 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5149 /* Make this one a permanent local. */
5150 buffer_permanent_local_flags
[idx
++] = 1;
5152 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5153 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5154 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5155 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
5156 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5157 /* Make this one a permanent local. */
5158 buffer_permanent_local_flags
[idx
++] = 1;
5159 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5160 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5161 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5162 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5163 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5164 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5165 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5166 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5167 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5168 XSETFASTINT (buffer_local_flags
.fringe_indicator_alist
, idx
); ++idx
;
5169 XSETFASTINT (buffer_local_flags
.fringe_cursor_alist
, idx
); ++idx
;
5170 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5171 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5172 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5173 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5174 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5175 XSETFASTINT (buffer_local_flags
.cursor_in_non_selected_windows
, idx
); ++idx
;
5177 /* Need more room? */
5178 if (idx
>= MAX_PER_BUFFER_VARS
)
5180 last_per_buffer_idx
= idx
;
5182 Vbuffer_alist
= Qnil
;
5186 QSFundamental
= build_string ("Fundamental");
5188 Qfundamental_mode
= intern ("fundamental-mode");
5189 buffer_defaults
.major_mode
= Qfundamental_mode
;
5191 Qmode_class
= intern ("mode-class");
5193 Qprotected_field
= intern ("protected-field");
5195 Qpermanent_local
= intern ("permanent-local");
5197 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5198 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5200 Qucs_set_table_for_input
= intern ("ucs-set-table-for-input");
5202 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
5204 /* super-magic invisible buffer */
5205 Vbuffer_alist
= Qnil
;
5207 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5209 inhibit_modification_hooks
= 0;
5219 #ifdef USE_MMAP_FOR_BUFFERS
5221 /* When using the ralloc implementation based on mmap(2), buffer
5222 text pointers will have been set to null in the dumped Emacs.
5226 for (b
= all_buffers
; b
; b
= b
->next
)
5227 if (b
->text
->beg
== NULL
)
5228 enlarge_buffer_text (b
, 0);
5230 #endif /* USE_MMAP_FOR_BUFFERS */
5232 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5233 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5234 Fset_buffer_multibyte (Qnil
);
5236 pwd
= get_current_dir_name ();
5239 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5242 /* Maybe this should really use some standard subroutine
5243 whose definition is filename syntax dependent. */
5245 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5247 /* Grow buffer to add directory separator and '\0'. */
5248 pwd
= (char *) xrealloc (pwd
, len
+ 2);
5249 pwd
[len
] = DIRECTORY_SEP
;
5250 pwd
[len
+ 1] = '\0';
5252 #endif /* not VMS */
5254 current_buffer
->directory
= make_unibyte_string (pwd
, strlen (pwd
));
5255 if (! NILP (buffer_defaults
.enable_multibyte_characters
))
5256 /* At this moment, we still don't know how to decode the
5257 directory name. So, we keep the bytes in multibyte form so
5258 that ENCODE_FILE correctly gets the original bytes. */
5259 current_buffer
->directory
5260 = string_to_multibyte (current_buffer
->directory
);
5262 /* Add /: to the front of the name
5263 if it would otherwise be treated as magic. */
5264 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5266 /* If the default dir is just /, TEMP is non-nil
5267 because of the ange-ftp completion handler.
5268 However, it is not necessary to turn / into /:/.
5269 So avoid doing that. */
5270 && strcmp ("/", SDATA (current_buffer
->directory
)))
5271 current_buffer
->directory
5272 = concat2 (build_string ("/:"), current_buffer
->directory
);
5274 temp
= get_minibuffer (0);
5275 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5280 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5281 Object stored in the current buffer. address is the address of the slot
5282 in the buffer that is current now. */
5284 /* TYPE is nil for a general Lisp variable.
5285 An integer specifies a type; then only LIsp values
5286 with that type code are allowed (except that nil is allowed too).
5287 LNAME is the LIsp-level variable name.
5288 VNAME is the name of the buffer slot.
5289 DOC is a dummy where you write the doc string as a comment. */
5290 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5291 defvar_per_buffer (lname, vname, type, 0)
5294 defvar_per_buffer (namestring
, address
, type
, doc
)
5296 Lisp_Object
*address
;
5300 Lisp_Object sym
, val
;
5303 sym
= intern (namestring
);
5304 val
= allocate_misc ();
5305 offset
= (char *)address
- (char *)current_buffer
;
5307 XMISCTYPE (val
) = Lisp_Misc_Buffer_Objfwd
;
5308 XBUFFER_OBJFWD (val
)->offset
= offset
;
5309 SET_SYMBOL_VALUE (sym
, val
);
5310 PER_BUFFER_SYMBOL (offset
) = sym
;
5311 PER_BUFFER_TYPE (offset
) = type
;
5313 if (PER_BUFFER_IDX (offset
) == 0)
5314 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5315 slot of buffer_local_flags */
5320 /* initialize the buffer routines */
5324 staticpro (&last_overlay_modification_hooks
);
5325 last_overlay_modification_hooks
5326 = Fmake_vector (make_number (10), Qnil
);
5328 staticpro (&Vbuffer_defaults
);
5329 staticpro (&Vbuffer_local_symbols
);
5330 staticpro (&Qfundamental_mode
);
5331 staticpro (&Qmode_class
);
5332 staticpro (&QSFundamental
);
5333 staticpro (&Vbuffer_alist
);
5334 staticpro (&Qprotected_field
);
5335 staticpro (&Qpermanent_local
);
5336 staticpro (&Qkill_buffer_hook
);
5337 Qoverlayp
= intern ("overlayp");
5338 staticpro (&Qoverlayp
);
5339 Qevaporate
= intern ("evaporate");
5340 staticpro (&Qevaporate
);
5341 Qmodification_hooks
= intern ("modification-hooks");
5342 staticpro (&Qmodification_hooks
);
5343 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5344 staticpro (&Qinsert_in_front_hooks
);
5345 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5346 staticpro (&Qinsert_behind_hooks
);
5347 Qget_file_buffer
= intern ("get-file-buffer");
5348 staticpro (&Qget_file_buffer
);
5349 Qpriority
= intern ("priority");
5350 staticpro (&Qpriority
);
5351 Qwindow
= intern ("window");
5352 staticpro (&Qwindow
);
5353 Qbefore_string
= intern ("before-string");
5354 staticpro (&Qbefore_string
);
5355 Qafter_string
= intern ("after-string");
5356 staticpro (&Qafter_string
);
5357 Qfirst_change_hook
= intern ("first-change-hook");
5358 staticpro (&Qfirst_change_hook
);
5359 Qbefore_change_functions
= intern ("before-change-functions");
5360 staticpro (&Qbefore_change_functions
);
5361 Qafter_change_functions
= intern ("after-change-functions");
5362 staticpro (&Qafter_change_functions
);
5363 staticpro (&Qucs_set_table_for_input
);
5365 Qkill_buffer_query_functions
= intern ("kill-buffer-query-functions");
5366 staticpro (&Qkill_buffer_query_functions
);
5368 Fput (Qprotected_field
, Qerror_conditions
,
5369 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5370 Fput (Qprotected_field
, Qerror_message
,
5371 build_string ("Attempt to modify a protected field"));
5373 /* All these use DEFVAR_LISP_NOPRO because the slots in
5374 buffer_defaults will all be marked via Vbuffer_defaults. */
5376 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5377 &buffer_defaults
.mode_line_format
,
5378 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5379 This is the same as (default-value 'mode-line-format). */);
5381 DEFVAR_LISP_NOPRO ("default-header-line-format",
5382 &buffer_defaults
.header_line_format
,
5383 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5384 This is the same as (default-value 'header-line-format). */);
5386 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5387 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5388 This is the same as (default-value 'cursor-type). */);
5390 DEFVAR_LISP_NOPRO ("default-line-spacing",
5391 &buffer_defaults
.extra_line_spacing
,
5392 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5393 This is the same as (default-value 'line-spacing). */);
5395 DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows",
5396 &buffer_defaults
.cursor_in_non_selected_windows
,
5397 doc
: /* Default value of `cursor-in-non-selected-windows'.
5398 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5400 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5401 &buffer_defaults
.abbrev_mode
,
5402 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5403 This is the same as (default-value 'abbrev-mode). */);
5405 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5406 &buffer_defaults
.ctl_arrow
,
5407 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5408 This is the same as (default-value 'ctl-arrow). */);
5410 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5411 &buffer_defaults
.direction_reversed
,
5412 doc
: /* Default value of `direction-reversed' for buffers that do not override it.
5413 This is the same as (default-value 'direction-reversed). */);
5415 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5416 &buffer_defaults
.enable_multibyte_characters
,
5417 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5418 This is the same as (default-value 'enable-multibyte-characters). */);
5420 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5421 &buffer_defaults
.buffer_file_coding_system
,
5422 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5423 This is the same as (default-value 'buffer-file-coding-system). */);
5425 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5426 &buffer_defaults
.truncate_lines
,
5427 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5428 This is the same as (default-value 'truncate-lines). */);
5430 DEFVAR_LISP_NOPRO ("default-fill-column",
5431 &buffer_defaults
.fill_column
,
5432 doc
: /* Default value of `fill-column' for buffers that do not override it.
5433 This is the same as (default-value 'fill-column). */);
5435 DEFVAR_LISP_NOPRO ("default-left-margin",
5436 &buffer_defaults
.left_margin
,
5437 doc
: /* Default value of `left-margin' for buffers that do not override it.
5438 This is the same as (default-value 'left-margin). */);
5440 DEFVAR_LISP_NOPRO ("default-tab-width",
5441 &buffer_defaults
.tab_width
,
5442 doc
: /* Default value of `tab-width' for buffers that do not override it.
5443 This is the same as (default-value 'tab-width). */);
5445 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5446 &buffer_defaults
.case_fold_search
,
5447 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5448 This is the same as (default-value 'case-fold-search). */);
5451 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5452 &buffer_defaults
.buffer_file_type
,
5453 doc
: /* Default file type for buffers that do not override it.
5454 This is the same as (default-value 'buffer-file-type).
5455 The file type is nil for text, t for binary. */);
5458 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5459 &buffer_defaults
.left_margin_cols
,
5460 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5461 This is the same as (default-value 'left-margin-width). */);
5463 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5464 &buffer_defaults
.right_margin_cols
,
5465 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5466 This is the same as (default-value 'right-margin-width). */);
5468 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5469 &buffer_defaults
.left_fringe_width
,
5470 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5471 This is the same as (default-value 'left-fringe-width). */);
5473 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5474 &buffer_defaults
.right_fringe_width
,
5475 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5476 This is the same as (default-value 'right-fringe-width). */);
5478 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5479 &buffer_defaults
.fringes_outside_margins
,
5480 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5481 This is the same as (default-value 'fringes-outside-margins). */);
5483 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5484 &buffer_defaults
.scroll_bar_width
,
5485 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5486 This is the same as (default-value 'scroll-bar-width). */);
5488 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5489 &buffer_defaults
.vertical_scroll_bar_type
,
5490 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5491 This is the same as (default-value 'vertical-scroll-bar). */);
5493 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5494 &buffer_defaults
.indicate_empty_lines
,
5495 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5496 This is the same as (default-value 'indicate-empty-lines). */);
5498 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5499 &buffer_defaults
.indicate_buffer_boundaries
,
5500 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5501 This is the same as (default-value 'indicate-buffer-boundaries). */);
5503 DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist",
5504 &buffer_defaults
.fringe_indicator_alist
,
5505 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5506 This is the same as (default-value 'fringe-indicator-alist'). */);
5508 DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist",
5509 &buffer_defaults
.fringe_cursor_alist
,
5510 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5511 This is the same as (default-value 'fringe-cursor-alist'). */);
5513 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5514 &buffer_defaults
.scroll_up_aggressively
,
5515 doc
: /* Default value of `scroll-up-aggressively'.
5516 This value applies in buffers that don't have their own local values.
5517 This is the same as (default-value 'scroll-up-aggressively). */);
5519 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5520 &buffer_defaults
.scroll_down_aggressively
,
5521 doc
: /* Default value of `scroll-down-aggressively'.
5522 This value applies in buffers that don't have their own local values.
5523 This is the same as (default-value 'scroll-down-aggressively). */);
5525 DEFVAR_PER_BUFFER ("header-line-format",
5526 ¤t_buffer
->header_line_format
,
5528 doc
: /* Analogous to `mode-line-format', but controls the header line.
5529 The header line appears, optionally, at the top of a window;
5530 the mode line appears at the bottom. */);
5532 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5534 doc
: /* Template for displaying mode line for current buffer.
5535 Each buffer has its own value of this variable.
5536 Value may be nil, a string, a symbol or a list or cons cell.
5537 A value of nil means don't display a mode line.
5538 For a symbol, its value is used (but it is ignored if t or nil).
5539 A string appearing directly as the value of a symbol is processed verbatim
5540 in that the %-constructs below are not recognized.
5541 Note that unless the symbol is marked as a `risky-local-variable', all
5542 properties in any strings, as well as all :eval and :propertize forms
5543 in the value of that symbol will be ignored.
5544 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5545 is used as a mode line element. Be careful--FORM should not load any files,
5546 because that can cause an infinite recursion.
5547 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5548 with the specified properties PROPS applied.
5549 For a list whose car is a symbol, the symbol's value is taken,
5550 and if that is non-nil, the cadr of the list is processed recursively.
5551 Otherwise, the caddr of the list (if there is one) is processed.
5552 For a list whose car is a string or list, each element is processed
5553 recursively and the results are effectively concatenated.
5554 For a list whose car is an integer, the cdr of the list is processed
5555 and padded (if the number is positive) or truncated (if negative)
5556 to the width specified by that number.
5557 A string is printed verbatim in the mode line except for %-constructs:
5558 (%-constructs are allowed when the string is the entire mode-line-format
5559 or when it is found in a cons-cell or a list)
5560 %b -- print buffer name. %f -- print visited file name.
5561 %F -- print frame name.
5562 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5563 %& is like %*, but ignore read-only-ness.
5564 % means buffer is read-only and * means it is modified.
5565 For a modified read-only buffer, %* gives % and %+ gives *.
5566 %s -- print process status. %l -- print the current line number.
5567 %c -- print the current column number (this makes editing slower).
5568 To make the column number update correctly in all cases,
5569 `column-number-mode' must be non-nil.
5570 %i -- print the size of the buffer.
5571 %I -- like %i, but use k, M, G, etc., to abbreviate.
5572 %p -- print percent of buffer above top of window, or Top, Bot or All.
5573 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5574 or print Bottom or All.
5575 %n -- print Narrow if appropriate.
5576 %t -- visited file is text or binary (if OS supports this distinction).
5577 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5578 %Z -- like %z, but including the end-of-line format.
5579 %e -- print error message about full memory.
5580 %@ -- print @ or hyphen. @ means that default-directory is on a
5582 %[ -- print one [ for each recursive editing level. %] similar.
5583 %% -- print %. %- -- print infinitely many dashes.
5584 Decimal digits after the % specify field width to which to pad. */);
5586 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5587 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5588 A value of nil means use current buffer's major mode,
5589 provided it is not marked as "special".
5591 When a mode is used by default, `find-file' switches to it
5592 before it reads the contents into the buffer and before
5593 it finishes setting up the buffer. Thus, the mode and
5594 its hooks should not expect certain variables such as
5595 `buffer-read-only' and `buffer-file-coding-system' to be set up. */);
5597 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5598 make_number (Lisp_Symbol
),
5599 doc
: /* Symbol for current buffer's major mode. */);
5601 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5603 doc
: /* Pretty name of current buffer's major mode (a string). */);
5605 DEFVAR_PER_BUFFER ("local-abbrev-table", ¤t_buffer
->abbrev_table
, Qnil
,
5606 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5608 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5609 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5611 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5613 doc
: /* *Non-nil if searches and matches should ignore case. */);
5615 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5616 make_number (Lisp_Int
),
5617 doc
: /* *Column beyond which automatic line-wrapping should happen.
5618 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5620 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5621 make_number (Lisp_Int
),
5622 doc
: /* *Column for the default `indent-line-function' to indent to.
5623 Linefeed indents to this column in Fundamental mode. */);
5625 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5626 make_number (Lisp_Int
),
5627 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5629 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5630 doc
: /* *Non-nil means display control chars with uparrow.
5631 A value of nil means use backslash and octal digits.
5632 This variable does not apply to characters whose display is specified
5633 in the current display table (if there is one). */);
5635 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5636 ¤t_buffer
->enable_multibyte_characters
,
5638 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5639 Otherwise they are regarded as unibyte. This affects the display,
5640 file I/O and the behavior of various editing commands.
5642 This variable is buffer-local but you cannot set it directly;
5643 use the function `set-buffer-multibyte' to change a buffer's representation.
5644 Changing its default value with `setq-default' is supported.
5645 See also variable `default-enable-multibyte-characters' and Info node
5646 `(elisp)Text Representations'. */);
5647 XSYMBOL (intern ("enable-multibyte-characters"))->constant
= 1;
5649 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5650 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5651 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5652 This variable applies to saving the buffer, and also to `write-region'
5653 and other functions that use `write-region'.
5654 It does not apply to sending output to subprocesses, however.
5656 If this is nil, the buffer is saved without any code conversion
5657 unless some coding system is specified in `file-coding-system-alist'
5658 for the buffer file.
5660 If the text to be saved cannot be encoded as specified by this variable,
5661 an alternative encoding is selected by `select-safe-coding-system', which see.
5663 The variable `coding-system-for-write', if non-nil, overrides this variable.
5665 This variable is never applied to a way of decoding a file while reading it. */);
5667 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5669 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5671 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5672 doc
: /* *Non-nil means do not display continuation lines.
5673 Instead, give each line of text just one screen line.
5675 Note that this is overridden by the variable
5676 `truncate-partial-width-windows' if that variable is non-nil
5677 and this buffer is not full-frame width. */);
5680 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5682 doc
: /* Non-nil if the visited file is a binary file.
5683 This variable is meaningful on MS-DOG and Windows NT.
5684 On those systems, it is automatically local in every buffer.
5685 On other systems, this variable is normally always nil. */);
5688 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5689 make_number (Lisp_String
),
5690 doc
: /* Name of default directory of current buffer. Should end with slash.
5691 To interactively change the default directory, use command `cd'. */);
5693 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5695 doc
: /* Function called (if non-nil) to perform auto-fill.
5696 It is called after self-inserting any character specified in
5697 the `auto-fill-chars' table.
5698 NOTE: This variable is not a hook;
5699 its value may not be a list of functions. */);
5701 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5702 make_number (Lisp_String
),
5703 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5705 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5706 make_number (Lisp_String
),
5707 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5708 The truename of a file is calculated by `file-truename'
5709 and then abbreviated with `abbreviate-file-name'. */);
5711 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5712 ¤t_buffer
->auto_save_file_name
,
5713 make_number (Lisp_String
),
5714 doc
: /* Name of file for auto-saving current buffer.
5715 If it is nil, that means don't auto-save this buffer. */);
5717 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5718 doc
: /* Non-nil if this buffer is read-only. */);
5720 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5721 doc
: /* Non-nil if this buffer's file has been backed up.
5722 Backing up is done before the first time the file is saved. */);
5724 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5725 make_number (Lisp_Int
),
5726 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5729 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5731 doc
: /* Non-nil enables selective display.
5732 An integer N as value means display only lines
5733 that start with less than N columns of space.
5734 A value of t means that the character ^M makes itself and
5735 all the rest of the line invisible; also, when saving the buffer
5736 in a file, save the ^M as a newline. */);
5739 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5740 ¤t_buffer
->selective_display_ellipses
,
5742 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5745 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5746 doc
: /* Non-nil if self-insertion should replace existing text.
5747 The value should be one of `overwrite-mode-textual',
5748 `overwrite-mode-binary', or nil.
5749 If it is `overwrite-mode-textual', self-insertion still
5750 inserts at the end of a line, and inserts when point is before a tab,
5751 until the tab is filled in.
5752 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5754 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5756 doc
: /* Display table that controls display of the contents of current buffer.
5758 If this variable is nil, the value of `standard-display-table' is used.
5759 Each window can have its own, overriding display table, see
5760 `set-window-display-table' and `window-display-table'.
5762 The display table is a char-table created with `make-display-table'.
5763 A char-table is an array indexed by character codes. Normal array
5764 primitives `aref' and `aset' can be used to access elements of a char-table.
5766 Each of the char-table elements control how to display the corresponding
5767 text character: the element at index C in the table says how to display
5768 the character whose code is C. Each element should be a vector of
5769 characters or nil. The value nil means display the character in the
5770 default fashion; otherwise, the characters from the vector are delivered
5771 to the screen instead of the original character.
5773 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5774 to display a capital Y instead of each X character.
5776 In addition, a char-table has six extra slots to control the display of:
5778 the end of a truncated screen line (extra-slot 0, a single character);
5779 the end of a continued line (extra-slot 1, a single character);
5780 the escape character used to display character codes in octal
5781 (extra-slot 2, a single character);
5782 the character used as an arrow for control characters (extra-slot 3,
5783 a single character);
5784 the decoration indicating the presence of invisible lines (extra-slot 4,
5785 a vector of characters);
5786 the character used to draw the border between side-by-side windows
5787 (extra-slot 5, a single character).
5789 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5791 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5793 doc
: /* *Width of left marginal area for display of a buffer.
5794 A value of nil means no marginal area. */);
5796 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5798 doc
: /* *Width of right marginal area for display of a buffer.
5799 A value of nil means no marginal area. */);
5801 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5803 doc
: /* *Width of this buffer's left fringe (in pixels).
5804 A value of 0 means no left fringe is shown in this buffer's window.
5805 A value of nil means to use the left fringe width from the window's frame. */);
5807 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5809 doc
: /* *Width of this buffer's right fringe (in pixels).
5810 A value of 0 means no right fringe is shown in this buffer's window.
5811 A value of nil means to use the right fringe width from the window's frame. */);
5813 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5815 doc
: /* *Non-nil means to display fringes outside display margins.
5816 A value of nil means to display fringes between margins and buffer text. */);
5818 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5820 doc
: /* *Width of this buffer's scroll bars in pixels.
5821 A value of nil means to use the scroll bar width from the window's frame. */);
5823 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5825 doc
: /* *Position of this buffer's vertical scroll bar.
5826 The value takes effect whenever you tell a window to display this buffer;
5827 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5829 A value of `left' or `right' means put the vertical scroll bar at that side
5830 of the window; a value of nil means don't show any vertical scroll bars.
5831 A value of t (the default) means do whatever the window's frame specifies. */);
5833 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5834 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5835 doc
: /* *Visually indicate empty lines after the buffer end.
5836 If non-nil, a bitmap is displayed in the left fringe of a window on
5837 window-systems. */);
5839 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5840 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
5841 doc
: /* *Visually indicate buffer boundaries and scrolling.
5842 If non-nil, the first and last line of the buffer are marked in the fringe
5843 of a window on window-systems with angle bitmaps, or if the window can be
5844 scrolled, the top and bottom line of the window are marked with up and down
5847 If value is a symbol `left' or `right', both angle and arrow bitmaps
5848 are displayed in the left or right fringe, resp. Any other value
5849 that doesn't look like an alist means display the angle bitmaps in
5850 the left fringe but no arrows.
5852 You can exercise more precise control by using an alist as the
5853 value. Each alist element (INDICATOR . POSITION) specifies
5854 where to show one of the indicators. INDICATOR is one of `top',
5855 `bottom', `up', `down', or t, which specifies the default position,
5856 and POSITION is one of `left', `right', or nil, meaning do not show
5859 For example, ((top . left) (t . right)) places the top angle bitmap in
5860 left fringe, the bottom angle bitmap in right fringe, and both arrow
5861 bitmaps in right fringe. To show just the angle bitmaps in the left
5862 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5864 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5865 ¤t_buffer
->fringe_indicator_alist
, Qnil
,
5866 doc
: /* *Mapping from logical to physical fringe indicator bitmaps.
5867 The value is an alist where each element (INDICATOR . BITMAPS)
5868 specifies the fringe bitmaps used to display a specific logical
5871 INDICATOR specifies the logical indicator type which is one of the
5872 following symbols: `truncation' , `continuation', `overlay-arrow',
5873 `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'.
5875 BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5876 the actual bitmap shown in the left or right fringe for the logical
5877 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5878 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5879 are used only for the `bottom' and `one-line' indicators when the last
5880 \(only) line in has no final newline. BITMAPS may also be a single
5881 symbol which is used in both left and right fringes. */);
5883 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5884 ¤t_buffer
->fringe_cursor_alist
, Qnil
,
5885 doc
: /* *Mapping from logical to physical fringe cursor bitmaps.
5886 The value is an alist where each element (CURSOR . BITMAP)
5887 specifies the fringe bitmaps used to display a specific logical
5888 cursor type in the fringe.
5890 CURSOR specifies the logical cursor type which is one of the following
5891 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5892 one is used to show a hollow cursor on narrow lines display lines
5893 where the normal hollow cursor will not fit.
5895 BITMAP is the corresponding fringe bitmap shown for the logical
5898 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5899 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5900 doc
: /* How far to scroll windows upward.
5901 If you move point off the bottom, the window scrolls automatically.
5902 This variable controls how far it scrolls. The value nil, the default,
5903 means scroll to center point. A fraction means scroll to put point
5904 that fraction of the window's height from the bottom of the window.
5905 When the value is 0.0, point goes at the bottom line, which in the simple
5906 case that you moved off with C-f means scrolling just one line. 1.0 means
5907 point goes at the top, so that in that simple case, the window
5908 scrolls by a full window height. Meaningful values are
5909 between 0.0 and 1.0, inclusive. */);
5911 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5912 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5913 doc
: /* How far to scroll windows downward.
5914 If you move point off the top, the window scrolls automatically.
5915 This variable controls how far it scrolls. The value nil, the default,
5916 means scroll to center point. A fraction means scroll to put point
5917 that fraction of the window's height from the top of the window.
5918 When the value is 0.0, point goes at the top line, which in the simple
5919 case that you moved off with C-b means scrolling just one line. 1.0 means
5920 point goes at the bottom, so that in that simple case, the window
5921 scrolls by a full window height. Meaningful values are
5922 between 0.0 and 1.0, inclusive. */);
5924 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5928 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5929 doc
: /* List of functions to call before each text change.
5930 Two arguments are passed to each function: the positions of
5931 the beginning and end of the range of old text to be changed.
5932 \(For an insertion, the beginning and end are at the same place.)
5933 No information is given about the length of the text after the change.
5935 Buffer changes made while executing the `before-change-functions'
5936 don't call any before-change or after-change functions.
5937 That's because these variables are temporarily set to nil.
5938 As a result, a hook function cannot straightforwardly alter the value of
5939 these variables. See the Emacs Lisp manual for a way of
5940 accomplishing an equivalent result by using other variables.
5942 If an unhandled error happens in running these functions,
5943 the variable's value remains nil. That prevents the error
5944 from happening repeatedly and making Emacs nonfunctional. */);
5945 Vbefore_change_functions
= Qnil
;
5947 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5948 doc
: /* List of functions to call after each text change.
5949 Three arguments are passed to each function: the positions of
5950 the beginning and end of the range of changed text,
5951 and the length in bytes of the pre-change text replaced by that range.
5952 \(For an insertion, the pre-change length is zero;
5953 for a deletion, that length is the number of bytes deleted,
5954 and the post-change beginning and end are at the same place.)
5956 Buffer changes made while executing the `after-change-functions'
5957 don't call any before-change or after-change functions.
5958 That's because these variables are temporarily set to nil.
5959 As a result, a hook function cannot straightforwardly alter the value of
5960 these variables. See the Emacs Lisp manual for a way of
5961 accomplishing an equivalent result by using other variables.
5963 If an unhandled error happens in running these functions,
5964 the variable's value remains nil. That prevents the error
5965 from happening repeatedly and making Emacs nonfunctional. */);
5966 Vafter_change_functions
= Qnil
;
5968 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5969 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5970 The functions are run using the `run-hooks' function. */);
5971 Vfirst_change_hook
= Qnil
;
5973 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5974 doc
: /* List of undo entries in current buffer.
5975 Recent changes come first; older changes follow newer.
5977 An entry (BEG . END) represents an insertion which begins at
5978 position BEG and ends at position END.
5980 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5981 from (abs POSITION). If POSITION is positive, point was at the front
5982 of the text being deleted; if negative, point was at the end.
5984 An entry (t HIGH . LOW) indicates that the buffer previously had
5985 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5986 of the visited file's modification time, as of that time. If the
5987 modification time of the most recent save is different, this entry is
5990 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5991 was modified between BEG and END. PROPERTY is the property name,
5992 and VALUE is the old value.
5994 An entry (apply FUN-NAME . ARGS) means undo the change with
5995 \(apply FUN-NAME ARGS).
5997 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5998 in the active region. BEG and END is the range affected by this entry
5999 and DELTA is the number of bytes added or deleted in that range by
6002 An entry (MARKER . DISTANCE) indicates that the marker MARKER
6003 was adjusted in position by the offset DISTANCE (an integer).
6005 An entry of the form POSITION indicates that point was at the buffer
6006 location given by the integer. Undoing an entry of this form places
6009 Entries with value `nil' mark undo boundaries. The undo command treats
6010 the changes between two undo boundaries as a single step to be undone.
6012 If the value of the variable is t, undo information is not recorded. */);
6014 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
6015 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
6017 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
6018 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
6020 Normally, the line-motion functions work by scanning the buffer for
6021 newlines. Columnar operations (like `move-to-column' and
6022 `compute-motion') also work by scanning the buffer, summing character
6023 widths as they go. This works well for ordinary text, but if the
6024 buffer's lines are very long (say, more than 500 characters), these
6025 motion functions will take longer to execute. Emacs may also take
6026 longer to update the display.
6028 If `cache-long-line-scans' is non-nil, these motion functions cache the
6029 results of their scans, and consult the cache to avoid rescanning
6030 regions of the buffer until the text is modified. The caches are most
6031 beneficial when they prevent the most searching---that is, when the
6032 buffer contains long lines and large regions of characters with the
6033 same, fixed screen width.
6035 When `cache-long-line-scans' is non-nil, processing short lines will
6036 become slightly slower (because of the overhead of consulting the
6037 cache), and the caches will use memory roughly proportional to the
6038 number of newlines and characters whose screen width varies.
6040 The caches require no explicit maintenance; their accuracy is
6041 maintained internally by the Emacs primitives. Enabling or disabling
6042 the cache should not affect the behavior of any of the motion
6043 functions; it should only affect their performance. */);
6045 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
6046 doc
: /* Value of point before the last series of scroll operations, or nil. */);
6048 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
6049 doc
: /* List of formats to use when saving this buffer.
6050 Formats are defined by `format-alist'. This variable is
6051 set when a file is visited. */);
6053 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
6054 ¤t_buffer
->auto_save_file_format
, Qnil
,
6055 doc
: /* *Format in which to write auto-save files.
6056 Should be a list of symbols naming formats that are defined in `format-alist'.
6057 If it is t, which is the default, auto-save files are written in the
6058 same format as a regular save would use. */);
6060 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
6061 ¤t_buffer
->invisibility_spec
, Qnil
,
6062 doc
: /* Invisibility spec of this buffer.
6063 The default is t, which means that text is invisible
6064 if it has a non-nil `invisible' property.
6065 If the value is a list, a text character is invisible if its `invisible'
6066 property is an element in that list (or is a list with members in common).
6067 If an element is a cons cell of the form (PROP . ELLIPSIS),
6068 then characters with property value PROP are invisible,
6069 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
6071 DEFVAR_PER_BUFFER ("buffer-display-count",
6072 ¤t_buffer
->display_count
, Qnil
,
6073 doc
: /* A number incremented each time this buffer is displayed in a window.
6074 The function `set-window-buffer' increments it. */);
6076 DEFVAR_PER_BUFFER ("buffer-display-time",
6077 ¤t_buffer
->display_time
, Qnil
,
6078 doc
: /* Time stamp updated each time this buffer is displayed in a window.
6079 The function `set-window-buffer' updates this variable
6080 to the value obtained by calling `current-time'.
6081 If the buffer has never been shown in a window, the value is nil. */);
6083 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
6084 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
6085 Non-nil also enables highlighting of the region whenever the mark is active.
6086 The variable `highlight-nonselected-windows' controls whether to highlight
6087 all windows or just the selected window.
6089 If the value is `lambda', that enables Transient Mark mode temporarily
6090 until the next buffer modification. If a command sets the value to `only',
6091 that enables Transient Mark mode for the following command only.
6092 During that following command, the value of `transient-mark-mode'
6093 is `identity'. If it is still `identity' at the end of that command,
6094 it changes to nil. */);
6095 Vtransient_mark_mode
= Qnil
;
6097 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
6098 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
6099 If the value is t, disregard `buffer-read-only' and all `read-only'
6100 text properties. If the value is a list, disregard `buffer-read-only'
6101 and disregard a `read-only' text property if the property value
6102 is a member of the list. */);
6103 Vinhibit_read_only
= Qnil
;
6105 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
6106 doc
: /* Cursor to use when this buffer is in the selected window.
6107 Values are interpreted as follows:
6109 t use the cursor specified for the frame
6110 nil don't display a cursor
6111 box display a filled box cursor
6112 hollow display a hollow box cursor
6113 bar display a vertical bar cursor with default width
6114 (bar . WIDTH) display a vertical bar cursor with width WIDTH
6115 hbar display a horizontal bar cursor with default height
6116 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
6117 ANYTHING ELSE display a hollow box cursor
6119 When the buffer is displayed in a nonselected window,
6120 this variable has no effect; the cursor appears as a hollow box. */);
6122 DEFVAR_PER_BUFFER ("line-spacing",
6123 ¤t_buffer
->extra_line_spacing
, Qnil
,
6124 doc
: /* Additional space to put between lines when displaying a buffer.
6125 The space is measured in pixels, and put below lines on window systems.
6126 If value is a floating point number, it specifies the spacing relative
6127 to the default frame line height. A value of nil means add no extra space. */);
6129 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
6130 ¤t_buffer
->cursor_in_non_selected_windows
, Qnil
,
6131 doc
: /* *Cursor type to display in non-selected windows.
6132 The value t means to use hollow box cursor. See `cursor-type' for other values. */);
6134 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
6135 doc
: /* List of functions called with no args to query before killing a buffer.
6136 The buffer being killed will be current while the functions are running.
6137 If any of them returns nil, the buffer is not killed. */);
6138 Vkill_buffer_query_functions
= Qnil
;
6140 DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook
,
6141 doc
: /* Normal hook run before changing the major mode of a buffer.
6142 The function `kill-all-local-variables' runs this before doing anything else. */);
6143 Vchange_major_mode_hook
= Qnil
;
6144 Qchange_major_mode_hook
= intern ("change-major-mode-hook");
6145 staticpro (&Qchange_major_mode_hook
);
6147 defsubr (&Sbuffer_live_p
);
6148 defsubr (&Sbuffer_list
);
6149 defsubr (&Sget_buffer
);
6150 defsubr (&Sget_file_buffer
);
6151 defsubr (&Sget_buffer_create
);
6152 defsubr (&Smake_indirect_buffer
);
6153 defsubr (&Sgenerate_new_buffer_name
);
6154 defsubr (&Sbuffer_name
);
6155 /*defsubr (&Sbuffer_number);*/
6156 defsubr (&Sbuffer_file_name
);
6157 defsubr (&Sbuffer_base_buffer
);
6158 defsubr (&Sbuffer_local_value
);
6159 defsubr (&Sbuffer_local_variables
);
6160 defsubr (&Sbuffer_modified_p
);
6161 defsubr (&Sset_buffer_modified_p
);
6162 defsubr (&Sbuffer_modified_tick
);
6163 defsubr (&Sbuffer_chars_modified_tick
);
6164 defsubr (&Srename_buffer
);
6165 defsubr (&Sother_buffer
);
6166 defsubr (&Sbuffer_enable_undo
);
6167 defsubr (&Skill_buffer
);
6168 defsubr (&Sset_buffer_major_mode
);
6169 defsubr (&Sswitch_to_buffer
);
6170 defsubr (&Spop_to_buffer
);
6171 defsubr (&Scurrent_buffer
);
6172 defsubr (&Sset_buffer
);
6173 defsubr (&Sbarf_if_buffer_read_only
);
6174 defsubr (&Sbury_buffer
);
6175 defsubr (&Serase_buffer
);
6176 defsubr (&Sset_buffer_multibyte
);
6177 defsubr (&Skill_all_local_variables
);
6179 defsubr (&Soverlayp
);
6180 defsubr (&Smake_overlay
);
6181 defsubr (&Sdelete_overlay
);
6182 defsubr (&Smove_overlay
);
6183 defsubr (&Soverlay_start
);
6184 defsubr (&Soverlay_end
);
6185 defsubr (&Soverlay_buffer
);
6186 defsubr (&Soverlay_properties
);
6187 defsubr (&Soverlays_at
);
6188 defsubr (&Soverlays_in
);
6189 defsubr (&Snext_overlay_change
);
6190 defsubr (&Sprevious_overlay_change
);
6191 defsubr (&Soverlay_recenter
);
6192 defsubr (&Soverlay_lists
);
6193 defsubr (&Soverlay_get
);
6194 defsubr (&Soverlay_put
);
6195 defsubr (&Srestore_buffer_modified_p
);
6201 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6202 initial_define_key (control_x_map
, 'k', "kill-buffer");
6204 /* This must not be in syms_of_buffer, because Qdisabled is not
6205 initialized when that function gets called. */
6206 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
6209 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
6210 (do not change this comment) */