1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 89, 93, 94, 95, 97, 98, 99,
3 2000, 01, 02, 03, 04, 2005 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
24 #include <sys/types.h>
26 #include <sys/param.h>
35 /* in 4.1 [probably SunOS? -stef] , param.h fails to define this. */
36 #define MAXPATHLEN 1024
37 #endif /* not MAXPATHLEN */
44 #include "intervals.h"
48 #include "character.h"
49 #include "region-cache.h"
51 #include "blockinput.h"
56 struct buffer
*current_buffer
; /* the current buffer */
58 /* First buffer in chain of all buffers (in reverse order of creation).
59 Threaded through ->next. */
61 struct buffer
*all_buffers
;
63 /* This structure holds the default values of the buffer-local variables
64 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
65 The default value occupies the same slot in this structure
66 as an individual buffer's value occupies in that buffer.
67 Setting the default value also goes through the alist of buffers
68 and stores into each buffer that does not say it has a local value. */
70 DECL_ALIGN (struct buffer
, buffer_defaults
);
72 /* A Lisp_Object pointer to the above, used for staticpro */
74 static Lisp_Object Vbuffer_defaults
;
76 /* This structure marks which slots in a buffer have corresponding
77 default values in buffer_defaults.
78 Each such slot has a nonzero value in this structure.
79 The value has only one nonzero bit.
81 When a buffer has its own local value for a slot,
82 the entry for that slot (found in the same slot in this structure)
83 is turned on in the buffer's local_flags array.
85 If a slot in this structure is -1, then even though there may
86 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
87 and the corresponding slot in buffer_defaults is not used.
89 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
90 but there is a default value which is copied into each buffer.
92 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
93 zero, that is a bug */
95 struct buffer buffer_local_flags
;
97 /* This structure holds the names of symbols whose values may be
98 buffer-local. It is indexed and accessed in the same way as the above. */
100 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
102 /* A Lisp_Object pointer to the above, used for staticpro */
103 static Lisp_Object Vbuffer_local_symbols
;
105 /* This structure holds the required types for the values in the
106 buffer-local slots. If a slot contains Qnil, then the
107 corresponding buffer slot may contain a value of any type. If a
108 slot contains an integer, then prospective values' tags must be
109 equal to that integer (except nil is always allowed).
110 When a tag does not match, the function
111 buffer_slot_type_mismatch will signal an error.
113 If a slot here contains -1, the corresponding variable is read-only. */
114 struct buffer buffer_local_types
;
116 /* Flags indicating which built-in buffer-local variables
117 are permanent locals. */
118 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
120 /* Number of per-buffer variables used. */
122 int last_per_buffer_idx
;
124 Lisp_Object
Fset_buffer ();
125 void set_buffer_internal ();
126 void set_buffer_internal_1 ();
127 static void call_overlay_mod_hooks ();
128 static void swap_out_buffer_local_variables ();
129 static void reset_buffer_local_variables ();
131 /* Alist of all buffer names vs the buffers. */
132 /* This used to be a variable, but is no longer,
133 to prevent lossage due to user rplac'ing this alist or its elements. */
134 Lisp_Object Vbuffer_alist
;
136 /* Functions to call before and after each text change. */
137 Lisp_Object Vbefore_change_functions
;
138 Lisp_Object Vafter_change_functions
;
140 Lisp_Object Vtransient_mark_mode
;
142 /* t means ignore all read-only text properties.
143 A list means ignore such a property if its value is a member of the list.
144 Any non-nil value means ignore buffer-read-only. */
145 Lisp_Object Vinhibit_read_only
;
147 /* List of functions to call that can query about killing a buffer.
148 If any of these functions returns nil, we don't kill it. */
149 Lisp_Object Vkill_buffer_query_functions
;
150 Lisp_Object Qkill_buffer_query_functions
;
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. */)
219 Lisp_Object framelist
, general
;
220 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
228 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
230 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
232 while (! NILP (tail
))
234 general
= Fdelq (XCAR (tail
), general
);
237 return nconc2 (framelist
, general
);
243 /* Like Fassoc, but use Fstring_equal to compare
244 (which ignores text properties),
245 and don't ever QUIT. */
248 assoc_ignore_text_properties (key
, list
)
249 register Lisp_Object key
;
252 register Lisp_Object tail
;
253 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
255 register Lisp_Object elt
, tem
;
257 tem
= Fstring_equal (Fcar (elt
), key
);
264 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
265 doc
: /* Return the buffer named NAME (a string).
266 If there is no live buffer named NAME, return nil.
267 NAME may also be a buffer; if so, the value is that buffer. */)
269 register Lisp_Object name
;
275 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
278 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
279 doc
: /* Return the buffer visiting file FILENAME (a string).
280 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
281 If there is no such live buffer, return nil.
282 See also `find-buffer-visiting'. */)
284 register Lisp_Object filename
;
286 register Lisp_Object tail
, buf
, tem
;
289 CHECK_STRING (filename
);
290 filename
= Fexpand_file_name (filename
, Qnil
);
292 /* If the file name has special constructs in it,
293 call the corresponding file handler. */
294 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
296 return call2 (handler
, Qget_file_buffer
, filename
);
298 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
300 buf
= Fcdr (XCAR (tail
));
301 if (!BUFFERP (buf
)) continue;
302 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
303 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
311 get_truename_buffer (filename
)
312 register Lisp_Object filename
;
314 register Lisp_Object tail
, buf
, tem
;
316 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
318 buf
= Fcdr (XCAR (tail
));
319 if (!BUFFERP (buf
)) continue;
320 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
321 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
328 /* Incremented for each buffer created, to assign the buffer number. */
331 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
332 doc
: /* Return the buffer named NAME, or create such a buffer and return it.
333 A new buffer is created if there is no live buffer named NAME.
334 If NAME starts with a space, the new buffer does not keep undo information.
335 If NAME is a buffer instead of a string, then it is the value returned.
336 The value is never nil. */)
338 register Lisp_Object name
;
340 register Lisp_Object buf
;
341 register struct buffer
*b
;
343 buf
= Fget_buffer (name
);
347 if (SCHARS (name
) == 0)
348 error ("Empty string for buffer name is not allowed");
350 b
= (struct buffer
*) allocate_buffer ();
352 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
354 /* An ordinary buffer uses its own struct buffer_text. */
355 b
->text
= &b
->own_text
;
358 BUF_GAP_SIZE (b
) = 20;
360 /* We allocate extra 1-byte at the tail and keep it always '\0' for
361 anchoring a search. */
362 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
364 if (! BUF_BEG_ADDR (b
))
365 buffer_memory_full ();
372 BUF_PT_BYTE (b
) = BEG_BYTE
;
373 BUF_GPT_BYTE (b
) = BEG_BYTE
;
374 BUF_BEGV_BYTE (b
) = BEG_BYTE
;
375 BUF_ZV_BYTE (b
) = BEG_BYTE
;
376 BUF_Z_BYTE (b
) = BEG_BYTE
;
378 BUF_OVERLAY_MODIFF (b
) = 1;
379 BUF_SAVE_MODIFF (b
) = 1;
380 BUF_INTERVALS (b
) = 0;
381 BUF_UNCHANGED_MODIFIED (b
) = 1;
382 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
383 BUF_END_UNCHANGED (b
) = 0;
384 BUF_BEG_UNCHANGED (b
) = 0;
385 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
387 b
->newline_cache
= 0;
388 b
->width_run_cache
= 0;
389 b
->width_table
= Qnil
;
390 b
->prevent_redisplay_optimizations_p
= 1;
392 /* Put this on the chain of all buffers including killed ones. */
393 b
->next
= all_buffers
;
396 /* An ordinary buffer normally doesn't need markers
397 to handle BEGV and ZV. */
399 b
->begv_marker
= Qnil
;
402 name
= Fcopy_sequence (name
);
403 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
406 if (SREF (name
, 0) != ' ')
412 reset_buffer_local_variables (b
, 1);
414 b
->mark
= Fmake_marker ();
415 BUF_MARKERS (b
) = NULL
;
418 /* Put this in the alist of all live buffers. */
420 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
422 /* An error in calling the function here (should someone redfine it)
423 can lead to infinite regress until you run out of stack. rms
424 says that's not worth protecting against. */
425 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
426 /* buf is on buffer-alist, so no gcpro. */
427 call1 (Qucs_set_table_for_input
, buf
);
433 /* Return a list of overlays which is a copy of the overlay list
434 LIST, but for buffer B. */
436 static struct Lisp_Overlay
*
437 copy_overlays (b
, list
)
439 struct Lisp_Overlay
*list
;
442 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
444 XSETBUFFER (buffer
, b
);
446 for (; list
; list
= list
->next
)
448 Lisp_Object overlay
, start
, end
, old_overlay
;
451 XSETMISC (old_overlay
, list
);
452 charpos
= marker_position (OVERLAY_START (old_overlay
));
453 start
= Fmake_marker ();
454 Fset_marker (start
, make_number (charpos
), buffer
);
455 XMARKER (start
)->insertion_type
456 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
458 charpos
= marker_position (OVERLAY_END (old_overlay
));
459 end
= Fmake_marker ();
460 Fset_marker (end
, make_number (charpos
), buffer
);
461 XMARKER (end
)->insertion_type
462 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
464 overlay
= allocate_misc ();
465 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
466 OVERLAY_START (overlay
) = start
;
467 OVERLAY_END (overlay
) = end
;
468 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
469 XOVERLAY (overlay
)->next
= NULL
;
472 tail
= tail
->next
= XOVERLAY (overlay
);
474 result
= tail
= XOVERLAY (overlay
);
481 /* Clone per-buffer values of buffer FROM.
483 Buffer TO gets the same per-buffer values as FROM, with the
484 following exceptions: (1) TO's name is left untouched, (2) markers
485 are copied and made to refer to TO, and (3) overlay lists are
489 clone_per_buffer_values (from
, to
)
490 struct buffer
*from
, *to
;
492 Lisp_Object to_buffer
, tem
;
495 XSETBUFFER (to_buffer
, to
);
497 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
499 offset
+= sizeof (Lisp_Object
))
503 obj
= PER_BUFFER_VALUE (from
, offset
);
506 struct Lisp_Marker
*m
= XMARKER (obj
);
507 obj
= Fmake_marker ();
508 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
509 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
512 PER_BUFFER_VALUE (to
, offset
) = obj
;
515 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
517 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
518 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
520 /* Get (a copy of) the alist of Lisp-level local variables of FROM
521 and install that in TO. */
522 to
->local_var_alist
= buffer_lisp_local_variables (from
);
525 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
527 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
528 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
529 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
530 NAME should be a string which is not the name of an existing buffer.
531 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
532 such as major and minor modes, in the indirect buffer.
533 CLONE nil means the indirect buffer's state is reset to default values. */)
534 (base_buffer
, name
, clone
)
535 Lisp_Object base_buffer
, name
, clone
;
537 Lisp_Object buf
, tem
;
541 buf
= Fget_buffer (name
);
543 error ("Buffer name `%s' is in use", SDATA (name
));
546 base_buffer
= Fget_buffer (base_buffer
);
547 if (NILP (base_buffer
))
548 error ("No such buffer: `%s'", SDATA (tem
));
549 if (NILP (XBUFFER (base_buffer
)->name
))
550 error ("Base buffer has been killed");
552 if (SCHARS (name
) == 0)
553 error ("Empty string for buffer name is not allowed");
555 b
= (struct buffer
*) allocate_buffer ();
556 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
558 if (XBUFFER (base_buffer
)->base_buffer
)
559 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
561 b
->base_buffer
= XBUFFER (base_buffer
);
563 /* Use the base buffer's text object. */
564 b
->text
= b
->base_buffer
->text
;
566 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
567 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
568 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
569 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
570 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
571 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
573 b
->newline_cache
= 0;
574 b
->width_run_cache
= 0;
575 b
->width_table
= Qnil
;
577 /* Put this on the chain of all buffers including killed ones. */
578 b
->next
= all_buffers
;
581 name
= Fcopy_sequence (name
);
582 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
586 reset_buffer_local_variables (b
, 1);
588 /* Put this in the alist of all live buffers. */
590 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
592 b
->mark
= Fmake_marker ();
595 /* The multibyte status belongs to the base buffer. */
596 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
598 /* Make sure the base buffer has markers for its narrowing. */
599 if (NILP (b
->base_buffer
->pt_marker
))
601 b
->base_buffer
->pt_marker
= Fmake_marker ();
602 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
603 BUF_PT (b
->base_buffer
),
604 BUF_PT_BYTE (b
->base_buffer
));
606 if (NILP (b
->base_buffer
->begv_marker
))
608 b
->base_buffer
->begv_marker
= Fmake_marker ();
609 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
610 BUF_BEGV (b
->base_buffer
),
611 BUF_BEGV_BYTE (b
->base_buffer
));
613 if (NILP (b
->base_buffer
->zv_marker
))
615 b
->base_buffer
->zv_marker
= Fmake_marker ();
616 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
617 BUF_ZV (b
->base_buffer
),
618 BUF_ZV_BYTE (b
->base_buffer
));
619 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
624 /* Give the indirect buffer markers for its narrowing. */
625 b
->pt_marker
= Fmake_marker ();
626 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
627 b
->begv_marker
= Fmake_marker ();
628 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
629 b
->zv_marker
= Fmake_marker ();
630 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
631 XMARKER (b
->zv_marker
)->insertion_type
= 1;
635 struct buffer
*old_b
= current_buffer
;
637 clone_per_buffer_values (b
->base_buffer
, b
);
639 b
->file_truename
= Qnil
;
640 b
->display_count
= make_number (0);
642 b
->auto_save_file_name
= Qnil
;
643 set_buffer_internal_1 (b
);
644 Fset (intern ("buffer-save-without-query"), Qnil
);
645 Fset (intern ("buffer-file-number"), Qnil
);
646 Fset (intern ("buffer-stale-function"), Qnil
);
647 set_buffer_internal_1 (old_b
);
654 delete_all_overlays (b
)
659 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
660 have to empty the list, otherwise we end up with overlays that
661 think they belong to this buffer while the buffer doesn't know about
663 while (b
->overlays_before
)
665 XSETMISC (overlay
, b
->overlays_before
);
666 Fdelete_overlay (overlay
);
668 while (b
->overlays_after
)
670 XSETMISC (overlay
, b
->overlays_after
);
671 Fdelete_overlay (overlay
);
673 eassert (b
->overlays_before
== NULL
);
674 eassert (b
->overlays_after
== NULL
);
677 /* Reinitialize everything about a buffer except its name and contents
679 If called on an already-initialized buffer, the list of overlays
680 should be deleted before calling this function, otherwise we end up
681 with overlays that claim to belong to the buffer but the buffer
682 claims it doesn't belong to it. */
686 register struct buffer
*b
;
689 b
->file_truename
= Qnil
;
690 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
692 XSETFASTINT (b
->save_length
, 0);
693 b
->last_window_start
= 1;
694 /* It is more conservative to start out "changed" than "unchanged". */
696 b
->prevent_redisplay_optimizations_p
= 1;
698 b
->auto_save_modified
= 0;
699 b
->auto_save_failure_time
= -1;
700 b
->auto_save_file_name
= Qnil
;
702 b
->overlays_before
= NULL
;
703 b
->overlays_after
= NULL
;
704 b
->overlay_center
= BEG
;
705 b
->mark_active
= Qnil
;
706 b
->point_before_scroll
= Qnil
;
707 b
->file_format
= Qnil
;
708 b
->auto_save_file_format
= Qt
;
709 b
->last_selected_window
= Qnil
;
710 XSETINT (b
->display_count
, 0);
711 b
->display_time
= Qnil
;
712 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
713 b
->cursor_type
= buffer_defaults
.cursor_type
;
714 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
716 b
->display_error_modiff
= 0;
719 /* Reset buffer B's local variables info.
720 Don't use this on a buffer that has already been in use;
721 it does not treat permanent locals consistently.
722 Instead, use Fkill_all_local_variables.
724 If PERMANENT_TOO is 1, then we reset permanent built-in
725 buffer-local variables. If PERMANENT_TOO is 0,
726 we preserve those. */
729 reset_buffer_local_variables (b
, permanent_too
)
730 register struct buffer
*b
;
736 /* Reset the major mode to Fundamental, together with all the
737 things that depend on the major mode.
738 default-major-mode is handled at a higher level.
739 We ignore it here. */
740 b
->major_mode
= Qfundamental_mode
;
742 b
->mode_name
= QSFundamental
;
743 b
->minor_modes
= Qnil
;
745 /* If the standard case table has been altered and invalidated,
746 fix up its insides first. */
747 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
748 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
749 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
750 Fset_standard_case_table (Vascii_downcase_table
);
752 b
->downcase_table
= Vascii_downcase_table
;
753 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
754 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
755 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
756 b
->invisibility_spec
= Qt
;
758 b
->buffer_file_type
= Qnil
;
761 /* Reset all (or most) per-buffer variables to their defaults. */
762 b
->local_var_alist
= Qnil
;
763 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
764 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
765 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
767 /* For each slot that has a default value,
768 copy that into the slot. */
770 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
772 offset
+= sizeof (Lisp_Object
))
774 int idx
= PER_BUFFER_IDX (offset
);
777 || buffer_permanent_local_flags
[idx
] == 0))
778 /* Is -2 used anywhere? */
780 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
784 /* We split this away from generate-new-buffer, because rename-buffer
785 and set-visited-file-name ought to be able to use this to really
786 rename the buffer properly. */
788 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
790 doc
: /* Return a string that is the name of no existing buffer based on NAME.
791 If there is no live buffer named NAME, then return NAME.
792 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
793 \(starting at 2) until an unused name is found, and then return that name.
794 Optional second argument IGNORE specifies a name that is okay to use
795 \(if it is in the sequence to be tried)
796 even if a buffer with that name exists. */)
798 register Lisp_Object name
, ignore
;
800 register Lisp_Object gentemp
, tem
;
806 tem
= Fstring_equal (name
, ignore
);
809 tem
= Fget_buffer (name
);
816 sprintf (number
, "<%d>", ++count
);
817 gentemp
= concat2 (name
, build_string (number
));
818 tem
= Fstring_equal (gentemp
, ignore
);
821 tem
= Fget_buffer (gentemp
);
828 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
829 doc
: /* Return the name of BUFFER, as a string.
830 With no argument or nil as argument, return the name of the current buffer. */)
832 register Lisp_Object buffer
;
835 return current_buffer
->name
;
836 CHECK_BUFFER (buffer
);
837 return XBUFFER (buffer
)->name
;
840 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
841 doc
: /* Return name of file BUFFER is visiting, or nil if none.
842 No argument or nil as argument means use the current buffer. */)
844 register Lisp_Object buffer
;
847 return current_buffer
->filename
;
848 CHECK_BUFFER (buffer
);
849 return XBUFFER (buffer
)->filename
;
852 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
854 doc
: /* Return the base buffer of indirect buffer BUFFER.
855 If BUFFER is not indirect, return nil.
856 BUFFER defaults to the current buffer. */)
858 register Lisp_Object buffer
;
861 Lisp_Object base_buffer
;
864 base
= current_buffer
->base_buffer
;
867 CHECK_BUFFER (buffer
);
868 base
= XBUFFER (buffer
)->base_buffer
;
873 XSETBUFFER (base_buffer
, base
);
877 DEFUN ("buffer-local-value", Fbuffer_local_value
,
878 Sbuffer_local_value
, 2, 2, 0,
879 doc
: /* Return the value of VARIABLE in BUFFER.
880 If VARIABLE does not have a buffer-local binding in BUFFER, the value
881 is the default binding of the variable. */)
883 register Lisp_Object variable
;
884 register Lisp_Object buffer
;
886 register struct buffer
*buf
;
887 register Lisp_Object result
;
889 CHECK_SYMBOL (variable
);
890 CHECK_BUFFER (buffer
);
891 buf
= XBUFFER (buffer
);
893 if (SYMBOLP (variable
))
894 variable
= indirect_variable (variable
);
896 /* Look in local_var_list */
897 result
= Fassoc (variable
, buf
->local_var_alist
);
903 /* Look in special slots */
904 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
905 offset
< sizeof (struct buffer
);
906 /* sizeof EMACS_INT == sizeof Lisp_Object */
907 offset
+= (sizeof (EMACS_INT
)))
909 idx
= PER_BUFFER_IDX (offset
);
910 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
911 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
912 && EQ (PER_BUFFER_SYMBOL (offset
), variable
))
914 result
= PER_BUFFER_VALUE (buf
, offset
);
921 result
= Fdefault_value (variable
);
925 Lisp_Object valcontents
;
926 Lisp_Object current_alist_element
;
928 /* What binding is loaded right now? */
929 valcontents
= SYMBOL_VALUE (variable
);
930 current_alist_element
931 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
933 /* The value of the currently loaded binding is not
934 stored in it, but rather in the realvalue slot.
935 Store that value into the binding it belongs to
936 in case that is the one we are about to use. */
938 Fsetcdr (current_alist_element
,
939 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
941 /* Now get the (perhaps updated) value out of the binding. */
942 result
= XCDR (result
);
945 if (EQ (result
, Qunbound
))
946 return Fsignal (Qvoid_variable
, Fcons (variable
, Qnil
));
951 /* Return an alist of the Lisp-level buffer-local bindings of
952 buffer BUF. That is, don't include the variables maintained
953 in special slots in the buffer object. */
956 buffer_lisp_local_variables (buf
)
959 Lisp_Object result
= Qnil
;
960 register Lisp_Object tail
;
961 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
963 Lisp_Object val
, elt
;
967 /* Reference each variable in the alist in buf.
968 If inquiring about the current buffer, this gets the current values,
969 so store them into the alist so the alist is up to date.
970 If inquiring about some other buffer, this swaps out any values
971 for that buffer, making the alist up to date automatically. */
972 val
= find_symbol_value (XCAR (elt
));
973 /* Use the current buffer value only if buf is the current buffer. */
974 if (buf
!= current_buffer
)
977 /* If symbol is unbound, put just the symbol in the list. */
978 if (EQ (val
, Qunbound
))
979 result
= Fcons (XCAR (elt
), result
);
980 /* Otherwise, put (symbol . value) in the list. */
982 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
988 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
989 Sbuffer_local_variables
, 0, 1, 0,
990 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
991 Most elements look like (SYMBOL . VALUE), describing one variable.
992 For a symbol that is locally unbound, just the symbol appears in the value.
993 Note that storing new VALUEs in these elements doesn't change the variables.
994 No argument or nil as argument means use current buffer as BUFFER. */)
996 register Lisp_Object buffer
;
998 register struct buffer
*buf
;
999 register Lisp_Object result
;
1002 buf
= current_buffer
;
1005 CHECK_BUFFER (buffer
);
1006 buf
= XBUFFER (buffer
);
1009 result
= buffer_lisp_local_variables (buf
);
1011 /* Add on all the variables stored in special slots. */
1015 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
1016 offset
< sizeof (struct buffer
);
1017 /* sizeof EMACS_INT == sizeof Lisp_Object */
1018 offset
+= (sizeof (EMACS_INT
)))
1020 idx
= PER_BUFFER_IDX (offset
);
1021 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1022 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1023 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1024 PER_BUFFER_VALUE (buf
, offset
)),
1032 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1034 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1035 No argument or nil as argument means use current buffer as BUFFER. */)
1037 register Lisp_Object buffer
;
1039 register struct buffer
*buf
;
1041 buf
= current_buffer
;
1044 CHECK_BUFFER (buffer
);
1045 buf
= XBUFFER (buffer
);
1048 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1051 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1053 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1054 A non-nil FLAG means mark the buffer modified. */)
1056 register Lisp_Object flag
;
1058 register int already
;
1059 register Lisp_Object fn
;
1060 Lisp_Object buffer
, window
;
1062 #ifdef CLASH_DETECTION
1063 /* If buffer becoming modified, lock the file.
1064 If buffer becoming unmodified, unlock the file. */
1066 fn
= current_buffer
->file_truename
;
1067 /* Test buffer-file-name so that binding it to nil is effective. */
1068 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1070 already
= SAVE_MODIFF
< MODIFF
;
1071 if (!already
&& !NILP (flag
))
1073 else if (already
&& NILP (flag
))
1076 #endif /* CLASH_DETECTION */
1078 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1080 /* Set update_mode_lines only if buffer is displayed in some window.
1081 Packages like jit-lock or lazy-lock preserve a buffer's modified
1082 state by recording/restoring the state around blocks of code.
1083 Setting update_mode_lines makes redisplay consider all windows
1084 (on all frames). Stealth fontification of buffers not displayed
1085 would incur additional redisplay costs if we'd set
1086 update_modes_lines unconditionally.
1088 Ideally, I think there should be another mechanism for fontifying
1089 buffers without "modifying" buffers, or redisplay should be
1090 smarter about updating the `*' in mode lines. --gerd */
1091 XSETBUFFER (buffer
, current_buffer
);
1092 window
= Fget_buffer_window (buffer
, Qt
);
1093 if (WINDOWP (window
))
1095 ++update_mode_lines
;
1096 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1102 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1103 Srestore_buffer_modified_p
, 1, 1, 0,
1104 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1105 It is not ensured that mode lines will be updated to show the modified
1106 state of the current buffer. Use with care. */)
1110 #ifdef CLASH_DETECTION
1113 /* If buffer becoming modified, lock the file.
1114 If buffer becoming unmodified, unlock the file. */
1116 fn
= current_buffer
->file_truename
;
1117 /* Test buffer-file-name so that binding it to nil is effective. */
1118 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1120 int already
= SAVE_MODIFF
< MODIFF
;
1121 if (!already
&& !NILP (flag
))
1123 else if (already
&& NILP (flag
))
1126 #endif /* CLASH_DETECTION */
1128 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1132 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1134 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1135 Each buffer has a tick counter which is incremented each time the text in
1136 that buffer is changed. It wraps around occasionally.
1137 No argument or nil as argument means use current buffer as BUFFER. */)
1139 register Lisp_Object buffer
;
1141 register struct buffer
*buf
;
1143 buf
= current_buffer
;
1146 CHECK_BUFFER (buffer
);
1147 buf
= XBUFFER (buffer
);
1150 return make_number (BUF_MODIFF (buf
));
1153 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1154 "sRename buffer (to new name): \nP",
1155 doc
: /* Change current buffer's name to NEWNAME (a string).
1156 If second arg UNIQUE is nil or omitted, it is an error if a
1157 buffer named NEWNAME already exists.
1158 If UNIQUE is non-nil, come up with a new name using
1159 `generate-new-buffer-name'.
1160 Interactively, you can set UNIQUE with a prefix argument.
1161 We return the name we actually gave the buffer.
1162 This does not change the name of the visited file (if any). */)
1164 register Lisp_Object newname
, unique
;
1166 register Lisp_Object tem
, buf
;
1168 CHECK_STRING (newname
);
1170 if (SCHARS (newname
) == 0)
1171 error ("Empty string is invalid as a buffer name");
1173 tem
= Fget_buffer (newname
);
1176 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1177 rename the buffer automatically so you can create another
1178 with the original name. It makes UNIQUE equivalent to
1179 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1180 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1181 return current_buffer
->name
;
1183 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1185 error ("Buffer name `%s' is in use", SDATA (newname
));
1188 current_buffer
->name
= newname
;
1190 /* Catch redisplay's attention. Unless we do this, the mode lines for
1191 any windows displaying current_buffer will stay unchanged. */
1192 update_mode_lines
++;
1194 XSETBUFFER (buf
, current_buffer
);
1195 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1196 if (NILP (current_buffer
->filename
)
1197 && !NILP (current_buffer
->auto_save_file_name
))
1198 call0 (intern ("rename-auto-save-file"));
1199 /* Refetch since that last call may have done GC. */
1200 return current_buffer
->name
;
1203 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1204 doc
: /* Return most recently selected buffer other than BUFFER.
1205 Buffers not visible in windows are preferred to visible buffers,
1206 unless optional second argument VISIBLE-OK is non-nil.
1207 If the optional third argument FRAME is non-nil, use that frame's
1208 buffer list instead of the selected frame's buffer list.
1209 If no other buffer exists, the buffer `*scratch*' is returned.
1210 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1211 (buffer
, visible_ok
, frame
)
1212 register Lisp_Object buffer
, visible_ok
, frame
;
1214 Lisp_Object
Fset_buffer_major_mode ();
1215 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1219 frame
= selected_frame
;
1221 tail
= Vbuffer_alist
;
1222 pred
= frame_buffer_predicate (frame
);
1224 /* Consider buffers that have been seen in the selected frame
1225 before other buffers. */
1227 tem
= frame_buffer_list (frame
);
1231 if (BUFFERP (XCAR (tem
)))
1232 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1235 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1237 for (; CONSP (tail
); tail
= XCDR (tail
))
1239 buf
= Fcdr (XCAR (tail
));
1240 if (EQ (buf
, buffer
))
1244 if (NILP (XBUFFER (buf
)->name
))
1246 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1248 /* If the selected frame has a buffer_predicate,
1249 disregard buffers that don't fit the predicate. */
1252 tem
= call1 (pred
, buf
);
1257 if (NILP (visible_ok
))
1258 tem
= Fget_buffer_window (buf
, Qvisible
);
1263 if (NILP (notsogood
))
1266 if (!NILP (notsogood
))
1268 buf
= Fget_buffer (build_string ("*scratch*"));
1271 buf
= Fget_buffer_create (build_string ("*scratch*"));
1272 Fset_buffer_major_mode (buf
);
1277 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1279 doc
: /* Start keeping undo information for buffer BUFFER.
1280 No argument or nil as argument means do this for the current buffer. */)
1282 register Lisp_Object buffer
;
1284 Lisp_Object real_buffer
;
1287 XSETBUFFER (real_buffer
, current_buffer
);
1290 real_buffer
= Fget_buffer (buffer
);
1291 if (NILP (real_buffer
))
1295 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1296 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1302 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1303 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1304 The buffer being killed will be current while the hook is running.\n\
1307 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1308 doc
: /* Kill the buffer BUFFER.
1309 The argument may be a buffer or may be the name of a buffer.
1310 An argument of nil means kill the current buffer.
1312 Value is t if the buffer is actually killed, nil if user says no.
1314 The value of `kill-buffer-hook' (which may be local to that buffer),
1315 if not void, is a list of functions to be called, with no arguments,
1316 before the buffer is actually killed. The buffer to be killed is current
1317 when the hook functions are called.
1319 Any processes that have this buffer as the `process-buffer' are killed
1325 register struct buffer
*b
;
1326 register Lisp_Object tem
;
1327 register struct Lisp_Marker
*m
;
1328 struct gcpro gcpro1
;
1331 buf
= Fcurrent_buffer ();
1333 buf
= Fget_buffer (buffer
);
1339 /* Avoid trouble for buffer already dead. */
1343 /* Query if the buffer is still modified. */
1344 if (INTERACTIVE
&& !NILP (b
->filename
)
1345 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1348 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1349 b
->name
, make_number (0)));
1355 /* Run hooks with the buffer to be killed the current buffer. */
1357 int count
= SPECPDL_INDEX ();
1358 Lisp_Object arglist
[1];
1360 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1361 set_buffer_internal (b
);
1363 /* First run the query functions; if any query is answered no,
1364 don't kill the buffer. */
1365 arglist
[0] = Qkill_buffer_query_functions
;
1366 if (NILP (Frun_hook_with_args_until_failure (1, arglist
)))
1367 return unbind_to (count
, Qnil
);
1369 /* Then run the hooks. */
1370 Frun_hooks (1, &Qkill_buffer_hook
);
1371 unbind_to (count
, Qnil
);
1374 /* We have no more questions to ask. Verify that it is valid
1375 to kill the buffer. This must be done after the questions
1376 since anything can happen within do_yes_or_no_p. */
1378 /* Don't kill the minibuffer now current. */
1379 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1385 /* When we kill a base buffer, kill all its indirect buffers.
1386 We do it at this stage so nothing terrible happens if they
1387 ask questions or their hooks get errors. */
1388 if (! b
->base_buffer
)
1390 struct buffer
*other
;
1394 for (other
= all_buffers
; other
; other
= other
->next
)
1395 /* all_buffers contains dead buffers too;
1396 don't re-kill them. */
1397 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1400 XSETBUFFER (buf
, other
);
1407 /* Make this buffer not be current.
1408 In the process, notice if this is the sole visible buffer
1409 and give up if so. */
1410 if (b
== current_buffer
)
1412 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1414 if (b
== current_buffer
)
1418 /* Notice if the buffer to kill is the sole visible buffer
1419 when we're currently in the mini-buffer, and give up if so. */
1420 XSETBUFFER (tem
, current_buffer
);
1421 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1423 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1428 /* Now there is no question: we can kill the buffer. */
1430 #ifdef CLASH_DETECTION
1431 /* Unlock this buffer's file, if it is locked. */
1433 #endif /* CLASH_DETECTION */
1435 kill_buffer_processes (buf
);
1436 clear_charpos_cache (b
);
1438 tem
= Vinhibit_quit
;
1440 replace_buffer_in_all_windows (buf
);
1441 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1442 frames_discard_buffer (buf
);
1443 Vinhibit_quit
= tem
;
1445 /* Delete any auto-save file, if we saved it in this session.
1446 But not if the buffer is modified. */
1447 if (STRINGP (b
->auto_save_file_name
)
1448 && b
->auto_save_modified
!= 0
1449 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1450 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1451 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1454 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1456 internal_delete_file (b
->auto_save_file_name
);
1461 /* Unchain all markers that belong to this indirect buffer.
1462 Don't unchain the markers that belong to the base buffer
1463 or its other indirect buffers. */
1464 for (m
= BUF_MARKERS (b
); m
; )
1466 struct Lisp_Marker
*next
= m
->next
;
1474 /* Unchain all markers of this buffer and its indirect buffers.
1475 and leave them pointing nowhere. */
1476 for (m
= BUF_MARKERS (b
); m
; )
1478 struct Lisp_Marker
*next
= m
->next
;
1483 BUF_MARKERS (b
) = NULL
;
1484 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1486 /* Perhaps we should explicitly free the interval tree here... */
1489 /* Reset the local variables, so that this buffer's local values
1490 won't be protected from GC. They would be protected
1491 if they happened to remain encached in their symbols.
1492 This gets rid of them for certain. */
1493 swap_out_buffer_local_variables (b
);
1494 reset_buffer_local_variables (b
, 1);
1499 if (! b
->base_buffer
)
1500 free_buffer_text (b
);
1502 if (b
->newline_cache
)
1504 free_region_cache (b
->newline_cache
);
1505 b
->newline_cache
= 0;
1507 if (b
->width_run_cache
)
1509 free_region_cache (b
->width_run_cache
);
1510 b
->width_run_cache
= 0;
1512 b
->width_table
= Qnil
;
1514 b
->undo_list
= Qnil
;
1519 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1520 we do this each time BUF is selected visibly, the more recently
1521 selected buffers are always closer to the front of the list. This
1522 means that other_buffer is more likely to choose a relevant buffer. */
1528 register Lisp_Object link
, prev
;
1530 frame
= selected_frame
;
1533 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1535 if (EQ (XCDR (XCAR (link
)), buf
))
1540 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1541 we cannot use Fdelq itself here because it allows quitting. */
1544 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1546 XSETCDR (prev
, XCDR (XCDR (prev
)));
1548 XSETCDR (link
, Vbuffer_alist
);
1549 Vbuffer_alist
= link
;
1551 /* Now move this buffer to the front of frame_buffer_list also. */
1554 for (link
= frame_buffer_list (frame
); CONSP (link
);
1557 if (EQ (XCAR (link
), buf
))
1562 /* Effectively do delq. */
1567 set_frame_buffer_list (frame
,
1568 XCDR (frame_buffer_list (frame
)));
1570 XSETCDR (prev
, XCDR (XCDR (prev
)));
1572 XSETCDR (link
, frame_buffer_list (frame
));
1573 set_frame_buffer_list (frame
, link
);
1576 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1579 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1580 doc
: /* Set an appropriate major mode for BUFFER.
1581 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1582 according to `default-major-mode'.
1583 Use this function before selecting the buffer, since it may need to inspect
1584 the current buffer's major mode. */)
1589 Lisp_Object function
;
1591 if (STRINGP (XBUFFER (buffer
)->name
)
1592 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1593 function
= find_symbol_value (intern ("initial-major-mode"));
1596 function
= buffer_defaults
.major_mode
;
1598 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1599 function
= current_buffer
->major_mode
;
1602 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1605 count
= SPECPDL_INDEX ();
1607 /* To select a nonfundamental mode,
1608 select the buffer temporarily and then call the mode function. */
1610 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1612 Fset_buffer (buffer
);
1615 return unbind_to (count
, Qnil
);
1618 /* If switching buffers in WINDOW would be an error, return
1619 a C string saying what the error would be. */
1622 no_switch_window (window
)
1626 if (EQ (minibuf_window
, window
))
1627 return "Cannot switch buffers in minibuffer window";
1628 tem
= Fwindow_dedicated_p (window
);
1630 return "Cannot switch buffers in a dedicated window";
1634 /* Switch to buffer BUFFER in the selected window.
1635 If NORECORD is non-nil, don't call record_buffer. */
1638 switch_to_buffer_1 (buffer
, norecord
)
1639 Lisp_Object buffer
, norecord
;
1641 register Lisp_Object buf
;
1644 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1647 buf
= Fget_buffer (buffer
);
1650 buf
= Fget_buffer_create (buffer
);
1651 Fset_buffer_major_mode (buf
);
1655 if (NILP (norecord
))
1656 record_buffer (buf
);
1658 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1659 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1666 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1667 doc
: /* Select buffer BUFFER in the current window.
1668 If BUFFER does not identify an existing buffer,
1669 then this function creates a buffer with that name.
1671 When called from Lisp, BUFFER may be a buffer, a string \(a buffer name),
1672 or nil. If BUFFER is nil, then this function chooses a buffer
1673 using `other-buffer'.
1674 Optional second arg NORECORD non-nil means
1675 do not put this buffer at the front of the list of recently selected ones.
1676 This function returns the buffer it switched to.
1678 WARNING: This is NOT the way to work on another buffer temporarily
1679 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1680 the window-buffer correspondences. */)
1682 Lisp_Object buffer
, norecord
;
1686 if (EQ (buffer
, Fwindow_buffer (selected_window
)))
1687 /* Basically a NOP. Avoid signalling an error if the selected window
1688 is dedicated, or a minibuffer, ... */
1689 return Fset_buffer (buffer
);
1691 err
= no_switch_window (selected_window
);
1692 if (err
) error (err
);
1694 return switch_to_buffer_1 (buffer
, norecord
);
1697 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1698 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1699 BUFFER may be a buffer, a string \(a buffer name), or nil.
1700 If BUFFER is a string which is not the name of an existing buffer,
1701 then this function creates a buffer with that name.
1702 If BUFFER is nil, then it chooses some other buffer.
1703 If `pop-up-windows' is non-nil, windows can be split to do this.
1704 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1705 window even if BUFFER is already visible in the selected window,
1706 and ignore `same-window-regexps' and `same-window-buffer-names'.
1707 This function returns the buffer it switched to.
1708 This uses the function `display-buffer' as a subroutine; see the documentation
1709 of `display-buffer' for additional customization information.
1711 Optional third arg NORECORD non-nil means
1712 do not put this buffer at the front of the list of recently selected ones. */)
1713 (buffer
, other_window
, norecord
)
1714 Lisp_Object buffer
, other_window
, norecord
;
1716 register Lisp_Object buf
;
1718 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1721 buf
= Fget_buffer (buffer
);
1724 buf
= Fget_buffer_create (buffer
);
1725 Fset_buffer_major_mode (buf
);
1729 if (NILP (norecord
))
1730 /* Why bother ? Fselect_window will do it for us anyway. -stef */
1731 record_buffer (buf
);
1732 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
), norecord
);
1736 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1737 doc
: /* Return the current buffer as a Lisp object. */)
1740 register Lisp_Object buf
;
1741 XSETBUFFER (buf
, current_buffer
);
1745 /* Set the current buffer to B.
1747 We previously set windows_or_buffers_changed here to invalidate
1748 global unchanged information in beg_unchanged and end_unchanged.
1749 This is no longer necessary because we now compute unchanged
1750 information on a buffer-basis. Every action affecting other
1751 windows than the selected one requires a select_window at some
1752 time, and that increments windows_or_buffers_changed. */
1755 set_buffer_internal (b
)
1756 register struct buffer
*b
;
1758 if (current_buffer
!= b
)
1759 set_buffer_internal_1 (b
);
1762 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1763 This is used by redisplay. */
1766 set_buffer_internal_1 (b
)
1767 register struct buffer
*b
;
1769 register struct buffer
*old_buf
;
1770 register Lisp_Object tail
, valcontents
;
1773 #ifdef USE_MMAP_FOR_BUFFERS
1774 if (b
->text
->beg
== NULL
)
1775 enlarge_buffer_text (b
, 0);
1776 #endif /* USE_MMAP_FOR_BUFFERS */
1778 if (current_buffer
== b
)
1781 old_buf
= current_buffer
;
1783 last_known_column_point
= -1; /* invalidate indentation cache */
1787 /* Put the undo list back in the base buffer, so that it appears
1788 that an indirect buffer shares the undo list of its base. */
1789 if (old_buf
->base_buffer
)
1790 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1792 /* If the old current buffer has markers to record PT, BEGV and ZV
1793 when it is not current, update them now. */
1794 if (! NILP (old_buf
->pt_marker
))
1797 XSETBUFFER (obuf
, old_buf
);
1798 set_marker_both (old_buf
->pt_marker
, obuf
,
1799 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1801 if (! NILP (old_buf
->begv_marker
))
1804 XSETBUFFER (obuf
, old_buf
);
1805 set_marker_both (old_buf
->begv_marker
, obuf
,
1806 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1808 if (! NILP (old_buf
->zv_marker
))
1811 XSETBUFFER (obuf
, old_buf
);
1812 set_marker_both (old_buf
->zv_marker
, obuf
,
1813 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1817 /* Get the undo list from the base buffer, so that it appears
1818 that an indirect buffer shares the undo list of its base. */
1820 b
->undo_list
= b
->base_buffer
->undo_list
;
1822 /* If the new current buffer has markers to record PT, BEGV and ZV
1823 when it is not current, fetch them now. */
1824 if (! NILP (b
->pt_marker
))
1826 BUF_PT (b
) = marker_position (b
->pt_marker
);
1827 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1829 if (! NILP (b
->begv_marker
))
1831 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1832 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1834 if (! NILP (b
->zv_marker
))
1836 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1837 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1840 /* Look down buffer's list of local Lisp variables
1841 to find and update any that forward into C variables. */
1843 for (tail
= b
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1845 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1846 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1847 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1848 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1849 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1850 /* Just reference the variable
1851 to cause it to become set for this buffer. */
1852 Fsymbol_value (XCAR (XCAR (tail
)));
1855 /* Do the same with any others that were local to the previous buffer */
1858 for (tail
= old_buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1860 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1861 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1862 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1863 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1864 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1865 /* Just reference the variable
1866 to cause it to become set for this buffer. */
1867 Fsymbol_value (XCAR (XCAR (tail
)));
1871 /* Switch to buffer B temporarily for redisplay purposes.
1872 This avoids certain things that don't need to be done within redisplay. */
1878 register struct buffer
*old_buf
;
1880 if (current_buffer
== b
)
1883 old_buf
= current_buffer
;
1888 /* If the old current buffer has markers to record PT, BEGV and ZV
1889 when it is not current, update them now. */
1890 if (! NILP (old_buf
->pt_marker
))
1893 XSETBUFFER (obuf
, old_buf
);
1894 set_marker_both (old_buf
->pt_marker
, obuf
,
1895 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1897 if (! NILP (old_buf
->begv_marker
))
1900 XSETBUFFER (obuf
, old_buf
);
1901 set_marker_both (old_buf
->begv_marker
, obuf
,
1902 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1904 if (! NILP (old_buf
->zv_marker
))
1907 XSETBUFFER (obuf
, old_buf
);
1908 set_marker_both (old_buf
->zv_marker
, obuf
,
1909 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1913 /* If the new current buffer has markers to record PT, BEGV and ZV
1914 when it is not current, fetch them now. */
1915 if (! NILP (b
->pt_marker
))
1917 BUF_PT (b
) = marker_position (b
->pt_marker
);
1918 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1920 if (! NILP (b
->begv_marker
))
1922 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1923 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1925 if (! NILP (b
->zv_marker
))
1927 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1928 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1932 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1933 doc
: /* Make the buffer BUFFER current for editing operations.
1934 BUFFER may be a buffer or the name of an existing buffer.
1935 See also `save-excursion' when you want to make a buffer current temporarily.
1936 This function does not display the buffer, so its effect ends
1937 when the current command terminates.
1938 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1940 register Lisp_Object buffer
;
1942 register Lisp_Object buf
;
1943 buf
= Fget_buffer (buffer
);
1946 if (NILP (XBUFFER (buf
)->name
))
1947 error ("Selecting deleted buffer");
1948 set_buffer_internal (XBUFFER (buf
));
1952 /* Set the current buffer to BUFFER provided it is alive. */
1955 set_buffer_if_live (buffer
)
1958 if (! NILP (XBUFFER (buffer
)->name
))
1959 Fset_buffer (buffer
);
1963 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1964 Sbarf_if_buffer_read_only
, 0, 0, 0,
1965 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1968 if (!NILP (current_buffer
->read_only
)
1969 && NILP (Vinhibit_read_only
))
1970 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1974 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1975 doc
: /* Put BUFFER at the end of the list of all buffers.
1976 There it is the least likely candidate for `other-buffer' to return;
1977 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1978 You can specify a buffer name as BUFFER, or an actual buffer object.
1979 If BUFFER is nil or omitted, bury the current buffer.
1980 Also, if BUFFER is nil or omitted, remove the current buffer from the
1981 selected window if it is displayed there. */)
1983 register Lisp_Object buffer
;
1985 /* Figure out what buffer we're going to bury. */
1989 XSETBUFFER (buffer
, current_buffer
);
1991 tem
= Fwindow_buffer (selected_window
);
1992 /* If we're burying the current buffer, unshow it. */
1993 if (EQ (buffer
, tem
))
1995 if (NILP (Fwindow_dedicated_p (selected_window
)))
1996 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1997 else if (NILP (XWINDOW (selected_window
)->parent
))
1998 Ficonify_frame (Fwindow_frame (selected_window
));
2000 Fdelete_window (selected_window
);
2007 buf1
= Fget_buffer (buffer
);
2013 /* Move buffer to the end of the buffer list. Do nothing if the
2014 buffer is killed. */
2015 if (!NILP (XBUFFER (buffer
)->name
))
2017 Lisp_Object aelt
, link
;
2019 aelt
= Frassq (buffer
, Vbuffer_alist
);
2020 link
= Fmemq (aelt
, Vbuffer_alist
);
2021 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
2022 XSETCDR (link
, Qnil
);
2023 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
2025 /* Removing BUFFER from frame-specific lists
2026 has the effect of putting BUFFER at the end
2027 of the combined list in each frame. */
2028 frames_discard_buffer (buffer
);
2034 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2035 doc
: /* Delete the entire contents of the current buffer.
2036 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2037 so the buffer is truly empty after this. */)
2044 current_buffer
->last_window_start
= 1;
2045 /* Prevent warnings, or suspension of auto saving, that would happen
2046 if future size is less than past size. Use of erase-buffer
2047 implies that the future text is not really related to the past text. */
2048 XSETFASTINT (current_buffer
->save_length
, 0);
2053 validate_region (b
, e
)
2054 register Lisp_Object
*b
, *e
;
2056 CHECK_NUMBER_COERCE_MARKER (*b
);
2057 CHECK_NUMBER_COERCE_MARKER (*e
);
2059 if (XINT (*b
) > XINT (*e
))
2062 tem
= *b
; *b
= *e
; *e
= tem
;
2065 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2066 && XINT (*e
) <= ZV
))
2067 args_out_of_range (*b
, *e
);
2070 /* Advance BYTE_POS up to a character boundary
2071 and return the adjusted position. */
2074 advance_to_char_boundary (byte_pos
)
2079 if (byte_pos
== BEG
)
2080 /* Beginning of buffer is always a character boundary. */
2083 c
= FETCH_BYTE (byte_pos
);
2084 if (! CHAR_HEAD_P (c
))
2086 /* We should advance BYTE_POS only when C is a constituent of a
2087 multibyte sequence. */
2088 int orig_byte_pos
= byte_pos
;
2093 c
= FETCH_BYTE (byte_pos
);
2095 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2097 if (byte_pos
< orig_byte_pos
)
2098 byte_pos
= orig_byte_pos
;
2099 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2100 surely advance to the correct character boundary. If C is
2101 not, BYTE_POS was unchanged. */
2107 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2109 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2110 If FLAG is t, this makes the buffer a multibyte buffer.
2111 If FLAG is nil, this makes the buffer a single-byte buffer.
2112 In these cases, the buffer contents remain unchanged as a sequence of
2113 bytes but the contents viewed as characters do change.
2114 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2115 all eight-bit bytes to eight-bit characters.
2116 If the multibyte flag was really changed, undo information of the
2117 current buffer is cleared. */)
2121 struct Lisp_Marker
*tail
, *markers
;
2122 struct buffer
*other
;
2123 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2125 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2126 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2128 if (current_buffer
->base_buffer
)
2129 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2131 /* Do nothing if nothing actually changes. */
2132 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2135 /* It would be better to update the list,
2136 but this is good enough for now. */
2138 current_buffer
->undo_list
= Qt
;
2140 /* If the cached position is for this buffer, clear it out. */
2141 clear_charpos_cache (current_buffer
);
2144 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2146 begv
= BEGV
, zv
= ZV
;
2156 /* Do this first, so it can use CHAR_TO_BYTE
2157 to calculate the old correspondences. */
2158 set_intervals_multibyte (0);
2160 current_buffer
->enable_multibyte_characters
= Qnil
;
2166 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2169 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2170 tail
->charpos
= tail
->bytepos
;
2172 /* Convert multibyte form of 8-bit characters to unibyte. */
2187 if (ASCII_BYTE_P (*p
))
2189 else if (CHAR_BYTE8_HEAD_P (*p
))
2191 c
= STRING_CHAR_AND_LENGTH (p
, stop
- pos
, bytes
);
2192 /* Delete all bytes for this 8-bit character but the
2193 last one, and change the last one to the charcter
2196 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2208 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2209 p
+= bytes
, pos
+= bytes
;
2213 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2219 unsigned char *p
, *pend
;
2221 /* Be sure not to have a multibyte sequence striding over the GAP.
2222 Ex: We change this: "...abc\302 _GAP_ \241def..."
2223 to: "...abc _GAP_ \302\241def..." */
2226 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2227 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2229 unsigned char *p
= GPT_ADDR
- 1;
2231 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2232 if (BASE_LEADING_CODE_P (*p
))
2234 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2236 move_gap_both (new_gpt
, new_gpt
);
2240 /* Make the buffer contents valid as multibyte by converting
2241 8-bit characters to multibyte form. */
2259 if (ASCII_BYTE_P (*p
))
2261 else if (EQ (flag
, Qt
) && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2262 p
+= bytes
, pos
+= bytes
;
2265 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2268 c
= BYTE8_TO_CHAR (*p
);
2269 bytes
= CHAR_STRING (c
, tmp
);
2271 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2273 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2274 /* Now the gap is after the just inserted data. */
2292 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2294 /* Do this first, so that chars_in_text asks the right question.
2295 set_intervals_multibyte needs it too. */
2296 current_buffer
->enable_multibyte_characters
= Qt
;
2298 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2299 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2301 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2303 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2304 if (BEGV_BYTE
> GPT_BYTE
)
2305 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2307 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2309 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2310 if (ZV_BYTE
> GPT_BYTE
)
2311 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2313 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2316 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2319 if (pt_byte
> GPT_BYTE
)
2320 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2322 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2323 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2326 tail
= markers
= BUF_MARKERS (current_buffer
);
2328 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2329 getting confused by the markers that have not yet been updated.
2330 It is also a signal that it should never create a marker. */
2331 BUF_MARKERS (current_buffer
) = NULL
;
2333 for (; tail
; tail
= tail
->next
)
2335 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2336 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2339 /* Make sure no markers were put on the chain
2340 while the chain value was incorrect. */
2341 if (BUF_MARKERS (current_buffer
))
2344 BUF_MARKERS (current_buffer
) = markers
;
2346 /* Do this last, so it can calculate the new correspondences
2347 between chars and bytes. */
2348 set_intervals_multibyte (1);
2352 current_buffer
->undo_list
= Qnil
;
2354 /* Changing the multibyteness of a buffer means that all windows
2355 showing that buffer must be updated thoroughly. */
2356 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2357 ++windows_or_buffers_changed
;
2359 /* Copy this buffer's new multibyte status
2360 into all of its indirect buffers. */
2361 for (other
= all_buffers
; other
; other
= other
->next
)
2362 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2364 other
->enable_multibyte_characters
2365 = current_buffer
->enable_multibyte_characters
;
2366 other
->prevent_redisplay_optimizations_p
= 1;
2369 /* Restore the modifiedness of the buffer. */
2370 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2371 Fset_buffer_modified_p (Qnil
);
2374 /* Update coding systems of this buffer's process (if any). */
2376 Lisp_Object process
;
2378 process
= Fget_buffer_process (Fcurrent_buffer ());
2379 if (PROCESSP (process
))
2380 setup_process_coding_systems (process
);
2382 #endif /* subprocesses */
2387 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2389 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2390 Most local variable bindings are eliminated so that the default values
2391 become effective once more. Also, the syntax table is set from
2392 `standard-syntax-table', the local keymap is set to nil,
2393 and the abbrev table from `fundamental-mode-abbrev-table'.
2394 This function also forces redisplay of the mode line.
2396 Every function to select a new major mode starts by
2397 calling this function.
2399 As a special exception, local variables whose names have
2400 a non-nil `permanent-local' property are not eliminated by this function.
2402 The first thing this function does is run
2403 the normal hook `change-major-mode-hook'. */)
2406 register Lisp_Object alist
, sym
, tem
;
2409 if (!NILP (Vrun_hooks
))
2410 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2411 oalist
= current_buffer
->local_var_alist
;
2413 /* Make sure none of the bindings in oalist
2414 remain swapped in, in their symbols. */
2416 swap_out_buffer_local_variables (current_buffer
);
2418 /* Actually eliminate all local bindings of this buffer. */
2420 reset_buffer_local_variables (current_buffer
, 0);
2422 /* Any which are supposed to be permanent,
2423 make local again, with the same values they had. */
2425 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2427 sym
= XCAR (XCAR (alist
));
2428 tem
= Fget (sym
, Qpermanent_local
);
2431 Fmake_local_variable (sym
);
2432 Fset (sym
, XCDR (XCAR (alist
)));
2436 /* Force mode-line redisplay. Useful here because all major mode
2437 commands call this function. */
2438 update_mode_lines
++;
2443 /* Make sure no local variables remain set up with buffer B
2444 for their current values. */
2447 swap_out_buffer_local_variables (b
)
2450 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2452 XSETBUFFER (buffer
, b
);
2453 oalist
= b
->local_var_alist
;
2455 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2457 sym
= XCAR (XCAR (alist
));
2459 /* Need not do anything if some other buffer's binding is now encached. */
2460 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2461 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2463 /* Symbol is set up for this buffer's old local value.
2464 Set it up for the current buffer with the default value. */
2466 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2467 /* Store the symbol's current value into the alist entry
2468 it is currently set up for. This is so that, if the
2469 local is marked permanent, and we make it local again
2470 later in Fkill_all_local_variables, we don't lose the value. */
2471 XSETCDR (XCAR (tem
),
2472 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2473 /* Switch to the symbol's default-value alist entry. */
2475 /* Mark it as current for buffer B. */
2476 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2477 /* Store the current value into any forwarding in the symbol. */
2478 store_symval_forwarding (sym
,
2479 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2485 /* Find all the overlays in the current buffer that contain position POS.
2486 Return the number found, and store them in a vector in *VEC_PTR.
2487 Store in *LEN_PTR the size allocated for the vector.
2488 Store in *NEXT_PTR the next position after POS where an overlay starts,
2489 or ZV if there are no more overlays.
2490 Store in *PREV_PTR the previous position before POS where an overlay ends,
2491 or where an overlay starts which ends at or after POS;
2492 or BEGV if there are no such overlays.
2493 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2495 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2496 when this function is called.
2498 If EXTEND is non-zero, we make the vector bigger if necessary.
2499 If EXTEND is zero, we never extend the vector,
2500 and we store only as many overlays as will fit.
2501 But we still return the total number of overlays.
2503 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2504 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2505 default (BEGV or ZV). */
2508 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2511 Lisp_Object
**vec_ptr
;
2517 Lisp_Object overlay
, start
, end
;
2518 struct Lisp_Overlay
*tail
;
2521 Lisp_Object
*vec
= *vec_ptr
;
2524 int inhibit_storing
= 0;
2526 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2528 int startpos
, endpos
;
2530 XSETMISC (overlay
, tail
);
2532 start
= OVERLAY_START (overlay
);
2533 end
= OVERLAY_END (overlay
);
2534 endpos
= OVERLAY_POSITION (end
);
2541 startpos
= OVERLAY_POSITION (start
);
2542 /* This one ends at or after POS
2543 so its start counts for PREV_PTR if it's before POS. */
2544 if (prev
< startpos
&& startpos
< pos
)
2548 if (startpos
<= pos
)
2552 /* The supplied vector is full.
2553 Either make it bigger, or don't store any more in it. */
2556 /* Make it work with an initial len == 0. */
2561 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2565 inhibit_storing
= 1;
2568 if (!inhibit_storing
)
2570 /* Keep counting overlays even if we can't return them all. */
2573 else if (startpos
< next
)
2577 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2579 int startpos
, endpos
;
2581 XSETMISC (overlay
, tail
);
2583 start
= OVERLAY_START (overlay
);
2584 end
= OVERLAY_END (overlay
);
2585 startpos
= OVERLAY_POSITION (start
);
2588 if (startpos
< next
)
2592 endpos
= OVERLAY_POSITION (end
);
2599 /* Make it work with an initial len == 0. */
2604 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2608 inhibit_storing
= 1;
2611 if (!inhibit_storing
)
2615 if (startpos
< pos
&& startpos
> prev
)
2618 else if (endpos
< pos
&& endpos
> prev
)
2620 else if (endpos
== pos
&& startpos
> prev
2621 && (!change_req
|| startpos
< pos
))
2632 /* Find all the overlays in the current buffer that overlap the range BEG-END
2633 or are empty at BEG.
2635 Return the number found, and store them in a vector in *VEC_PTR.
2636 Store in *LEN_PTR the size allocated for the vector.
2637 Store in *NEXT_PTR the next position after POS where an overlay starts,
2638 or ZV if there are no more overlays.
2639 Store in *PREV_PTR the previous position before POS where an overlay ends,
2640 or BEGV if there are no previous overlays.
2641 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2643 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2644 when this function is called.
2646 If EXTEND is non-zero, we make the vector bigger if necessary.
2647 If EXTEND is zero, we never extend the vector,
2648 and we store only as many overlays as will fit.
2649 But we still return the total number of overlays. */
2652 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2655 Lisp_Object
**vec_ptr
;
2660 Lisp_Object overlay
, ostart
, oend
;
2661 struct Lisp_Overlay
*tail
;
2664 Lisp_Object
*vec
= *vec_ptr
;
2667 int inhibit_storing
= 0;
2669 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2671 int startpos
, endpos
;
2673 XSETMISC (overlay
, tail
);
2675 ostart
= OVERLAY_START (overlay
);
2676 oend
= OVERLAY_END (overlay
);
2677 endpos
= OVERLAY_POSITION (oend
);
2684 startpos
= OVERLAY_POSITION (ostart
);
2685 /* Count an interval if it either overlaps the range
2686 or is empty at the start of the range. */
2687 if ((beg
< endpos
&& startpos
< end
)
2688 || (startpos
== endpos
&& beg
== endpos
))
2692 /* The supplied vector is full.
2693 Either make it bigger, or don't store any more in it. */
2696 /* Make it work with an initial len == 0. */
2701 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2705 inhibit_storing
= 1;
2708 if (!inhibit_storing
)
2710 /* Keep counting overlays even if we can't return them all. */
2713 else if (startpos
< next
)
2717 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2719 int startpos
, endpos
;
2721 XSETMISC (overlay
, tail
);
2723 ostart
= OVERLAY_START (overlay
);
2724 oend
= OVERLAY_END (overlay
);
2725 startpos
= OVERLAY_POSITION (ostart
);
2728 if (startpos
< next
)
2732 endpos
= OVERLAY_POSITION (oend
);
2733 /* Count an interval if it either overlaps the range
2734 or is empty at the start of the range. */
2735 if ((beg
< endpos
&& startpos
< end
)
2736 || (startpos
== endpos
&& beg
== endpos
))
2742 /* Make it work with an initial len == 0. */
2747 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2751 inhibit_storing
= 1;
2754 if (!inhibit_storing
)
2758 else if (endpos
< beg
&& endpos
> prev
)
2770 /* Return non-zero if there exists an overlay with a non-nil
2771 `mouse-face' property overlapping OVERLAY. */
2774 mouse_face_overlay_overlaps (overlay
)
2775 Lisp_Object overlay
;
2777 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2778 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2780 Lisp_Object
*v
, tem
;
2783 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2784 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2787 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2788 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2791 for (i
= 0; i
< n
; ++i
)
2792 if (!EQ (v
[i
], overlay
)
2793 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2802 /* Fast function to just test if we're at an overlay boundary. */
2804 overlay_touches_p (pos
)
2807 Lisp_Object overlay
;
2808 struct Lisp_Overlay
*tail
;
2810 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2814 XSETMISC (overlay
,tail
);
2815 if (!GC_OVERLAYP (overlay
))
2818 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2821 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2825 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2829 XSETMISC (overlay
, tail
);
2830 if (!GC_OVERLAYP (overlay
))
2833 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2836 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2844 Lisp_Object overlay
;
2850 compare_overlays (v1
, v2
)
2851 const void *v1
, *v2
;
2853 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2854 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2855 if (s1
->priority
!= s2
->priority
)
2856 return s1
->priority
- s2
->priority
;
2857 if (s1
->beg
!= s2
->beg
)
2858 return s1
->beg
- s2
->beg
;
2859 if (s1
->end
!= s2
->end
)
2860 return s2
->end
- s1
->end
;
2864 /* Sort an array of overlays by priority. The array is modified in place.
2865 The return value is the new size; this may be smaller than the original
2866 size if some of the overlays were invalid or were window-specific. */
2868 sort_overlays (overlay_vec
, noverlays
, w
)
2869 Lisp_Object
*overlay_vec
;
2874 struct sortvec
*sortvec
;
2875 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2877 /* Put the valid and relevant overlays into sortvec. */
2879 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2882 Lisp_Object overlay
;
2884 overlay
= overlay_vec
[i
];
2885 if (OVERLAY_VALID (overlay
)
2886 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2887 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2889 /* If we're interested in a specific window, then ignore
2890 overlays that are limited to some other window. */
2895 window
= Foverlay_get (overlay
, Qwindow
);
2896 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2900 /* This overlay is good and counts: put it into sortvec. */
2901 sortvec
[j
].overlay
= overlay
;
2902 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2903 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2904 tem
= Foverlay_get (overlay
, Qpriority
);
2906 sortvec
[j
].priority
= XINT (tem
);
2908 sortvec
[j
].priority
= 0;
2914 /* Sort the overlays into the proper order: increasing priority. */
2917 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2919 for (i
= 0; i
< noverlays
; i
++)
2920 overlay_vec
[i
] = sortvec
[i
].overlay
;
2926 Lisp_Object string
, string2
;
2933 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2934 int size
; /* Allocated length of that array. */
2935 int used
; /* How much of the array is currently in use. */
2936 int bytes
; /* Total length of the strings in buf. */
2939 /* Buffers for storing information about the overlays touching a given
2940 position. These could be automatic variables in overlay_strings, but
2941 it's more efficient to hold onto the memory instead of repeatedly
2942 allocating and freeing it. */
2943 static struct sortstrlist overlay_heads
, overlay_tails
;
2944 static unsigned char *overlay_str_buf
;
2946 /* Allocated length of overlay_str_buf. */
2947 static int overlay_str_len
;
2949 /* A comparison function suitable for passing to qsort. */
2951 cmp_for_strings (as1
, as2
)
2954 struct sortstr
*s1
= (struct sortstr
*)as1
;
2955 struct sortstr
*s2
= (struct sortstr
*)as2
;
2956 if (s1
->size
!= s2
->size
)
2957 return s2
->size
- s1
->size
;
2958 if (s1
->priority
!= s2
->priority
)
2959 return s1
->priority
- s2
->priority
;
2964 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2965 struct sortstrlist
*ssl
;
2966 Lisp_Object str
, str2
, pri
;
2971 if (ssl
->used
== ssl
->size
)
2977 ssl
->buf
= ((struct sortstr
*)
2978 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2980 ssl
->buf
[ssl
->used
].string
= str
;
2981 ssl
->buf
[ssl
->used
].string2
= str2
;
2982 ssl
->buf
[ssl
->used
].size
= size
;
2983 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2986 if (NILP (current_buffer
->enable_multibyte_characters
))
2987 nbytes
= SCHARS (str
);
2988 else if (! STRING_MULTIBYTE (str
))
2989 nbytes
= count_size_as_multibyte (SDATA (str
),
2992 nbytes
= SBYTES (str
);
2994 ssl
->bytes
+= nbytes
;
2998 if (NILP (current_buffer
->enable_multibyte_characters
))
2999 nbytes
= SCHARS (str2
);
3000 else if (! STRING_MULTIBYTE (str2
))
3001 nbytes
= count_size_as_multibyte (SDATA (str2
),
3004 nbytes
= SBYTES (str2
);
3006 ssl
->bytes
+= nbytes
;
3010 /* Return the concatenation of the strings associated with overlays that
3011 begin or end at POS, ignoring overlays that are specific to a window
3012 other than W. The strings are concatenated in the appropriate order:
3013 shorter overlays nest inside longer ones, and higher priority inside
3014 lower. Normally all of the after-strings come first, but zero-sized
3015 overlays have their after-strings ride along with the before-strings
3016 because it would look strange to print them inside-out.
3018 Returns the string length, and stores the contents indirectly through
3019 PSTR, if that variable is non-null. The string may be overwritten by
3020 subsequent calls. */
3023 overlay_strings (pos
, w
, pstr
)
3026 unsigned char **pstr
;
3028 Lisp_Object overlay
, window
, str
;
3029 struct Lisp_Overlay
*ov
;
3030 int startpos
, endpos
;
3031 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
3033 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3034 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3035 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3037 XSETMISC (overlay
, ov
);
3038 eassert (OVERLAYP (overlay
));
3040 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3041 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3044 if (endpos
!= pos
&& startpos
!= pos
)
3046 window
= Foverlay_get (overlay
, Qwindow
);
3047 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3050 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3051 record_overlay_string (&overlay_heads
, str
,
3053 ? Foverlay_get (overlay
, Qafter_string
)
3055 Foverlay_get (overlay
, Qpriority
),
3057 else if (endpos
== pos
3058 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3059 record_overlay_string (&overlay_tails
, str
, Qnil
,
3060 Foverlay_get (overlay
, Qpriority
),
3063 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3065 XSETMISC (overlay
, ov
);
3066 eassert (OVERLAYP (overlay
));
3068 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3069 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3072 if (endpos
!= pos
&& startpos
!= pos
)
3074 window
= Foverlay_get (overlay
, Qwindow
);
3075 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3078 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3079 record_overlay_string (&overlay_heads
, str
,
3081 ? Foverlay_get (overlay
, Qafter_string
)
3083 Foverlay_get (overlay
, Qpriority
),
3085 else if (endpos
== pos
3086 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3087 record_overlay_string (&overlay_tails
, str
, Qnil
,
3088 Foverlay_get (overlay
, Qpriority
),
3091 if (overlay_tails
.used
> 1)
3092 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3094 if (overlay_heads
.used
> 1)
3095 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3097 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3102 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3104 if (total
> overlay_str_len
)
3106 overlay_str_len
= total
;
3107 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3110 p
= overlay_str_buf
;
3111 for (i
= overlay_tails
.used
; --i
>= 0;)
3114 tem
= overlay_tails
.buf
[i
].string
;
3115 nbytes
= copy_text (SDATA (tem
), p
,
3117 STRING_MULTIBYTE (tem
), multibyte
);
3120 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3123 tem
= overlay_heads
.buf
[i
].string
;
3124 nbytes
= copy_text (SDATA (tem
), p
,
3126 STRING_MULTIBYTE (tem
), multibyte
);
3128 tem
= overlay_heads
.buf
[i
].string2
;
3131 nbytes
= copy_text (SDATA (tem
), p
,
3133 STRING_MULTIBYTE (tem
), multibyte
);
3137 if (p
!= overlay_str_buf
+ total
)
3140 *pstr
= overlay_str_buf
;
3146 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3149 recenter_overlay_lists (buf
, pos
)
3153 Lisp_Object overlay
, beg
, end
;
3154 struct Lisp_Overlay
*prev
, *tail
, *next
;
3156 /* See if anything in overlays_before should move to overlays_after. */
3158 /* We don't strictly need prev in this loop; it should always be nil.
3159 But we use it for symmetry and in case that should cease to be true
3160 with some future change. */
3162 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3165 XSETMISC (overlay
, tail
);
3167 /* If the overlay is not valid, get rid of it. */
3168 if (!OVERLAY_VALID (overlay
))
3173 /* Splice the cons cell TAIL out of overlays_before. */
3177 buf
->overlays_before
= next
;
3183 beg
= OVERLAY_START (overlay
);
3184 end
= OVERLAY_END (overlay
);
3186 if (OVERLAY_POSITION (end
) > pos
)
3188 /* OVERLAY needs to be moved. */
3189 int where
= OVERLAY_POSITION (beg
);
3190 struct Lisp_Overlay
*other
, *other_prev
;
3192 /* Splice the cons cell TAIL out of overlays_before. */
3196 buf
->overlays_before
= next
;
3198 /* Search thru overlays_after for where to put it. */
3200 for (other
= buf
->overlays_after
; other
;
3201 other_prev
= other
, other
= other
->next
)
3203 Lisp_Object otherbeg
, otheroverlay
;
3205 XSETMISC (otheroverlay
, other
);
3206 eassert (OVERLAY_VALID (otheroverlay
));
3208 otherbeg
= OVERLAY_START (otheroverlay
);
3209 if (OVERLAY_POSITION (otherbeg
) >= where
)
3213 /* Add TAIL to overlays_after before OTHER. */
3216 other_prev
->next
= tail
;
3218 buf
->overlays_after
= tail
;
3222 /* We've reached the things that should stay in overlays_before.
3223 All the rest of overlays_before must end even earlier,
3228 /* See if anything in overlays_after should be in overlays_before. */
3230 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3233 XSETMISC (overlay
, tail
);
3235 /* If the overlay is not valid, get rid of it. */
3236 if (!OVERLAY_VALID (overlay
))
3241 /* Splice the cons cell TAIL out of overlays_after. */
3245 buf
->overlays_after
= next
;
3251 beg
= OVERLAY_START (overlay
);
3252 end
= OVERLAY_END (overlay
);
3254 /* Stop looking, when we know that nothing further
3255 can possibly end before POS. */
3256 if (OVERLAY_POSITION (beg
) > pos
)
3259 if (OVERLAY_POSITION (end
) <= pos
)
3261 /* OVERLAY needs to be moved. */
3262 int where
= OVERLAY_POSITION (end
);
3263 struct Lisp_Overlay
*other
, *other_prev
;
3265 /* Splice the cons cell TAIL out of overlays_after. */
3269 buf
->overlays_after
= next
;
3271 /* Search thru overlays_before for where to put it. */
3273 for (other
= buf
->overlays_before
; other
;
3274 other_prev
= other
, other
= other
->next
)
3276 Lisp_Object otherend
, otheroverlay
;
3278 XSETMISC (otheroverlay
, other
);
3279 eassert (OVERLAY_VALID (otheroverlay
));
3281 otherend
= OVERLAY_END (otheroverlay
);
3282 if (OVERLAY_POSITION (otherend
) <= where
)
3286 /* Add TAIL to overlays_before before OTHER. */
3289 other_prev
->next
= tail
;
3291 buf
->overlays_before
= tail
;
3296 buf
->overlay_center
= pos
;
3300 adjust_overlays_for_insert (pos
, length
)
3304 /* After an insertion, the lists are still sorted properly,
3305 but we may need to update the value of the overlay center. */
3306 if (current_buffer
->overlay_center
>= pos
)
3307 current_buffer
->overlay_center
+= length
;
3311 adjust_overlays_for_delete (pos
, length
)
3315 if (current_buffer
->overlay_center
< pos
)
3316 /* The deletion was to our right. No change needed; the before- and
3317 after-lists are still consistent. */
3319 else if (current_buffer
->overlay_center
> pos
+ length
)
3320 /* The deletion was to our left. We need to adjust the center value
3321 to account for the change in position, but the lists are consistent
3322 given the new value. */
3323 current_buffer
->overlay_center
-= length
;
3325 /* We're right in the middle. There might be things on the after-list
3326 that now belong on the before-list. Recentering will move them,
3327 and also update the center point. */
3328 recenter_overlay_lists (current_buffer
, pos
);
3331 /* Fix up overlays that were garbled as a result of permuting markers
3332 in the range START through END. Any overlay with at least one
3333 endpoint in this range will need to be unlinked from the overlay
3334 list and reinserted in its proper place.
3335 Such an overlay might even have negative size at this point.
3336 If so, we'll make the overlay empty. */
3338 fix_start_end_in_overlays (start
, end
)
3339 register int start
, end
;
3341 Lisp_Object overlay
;
3342 struct Lisp_Overlay
*before_list
, *after_list
;
3343 /* These are either nil, indicating that before_list or after_list
3344 should be assigned, or the cons cell the cdr of which should be
3346 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3347 /* 'Parent', likewise, indicates a cons cell or
3348 current_buffer->overlays_before or overlays_after, depending
3349 which loop we're in. */
3350 struct Lisp_Overlay
*tail
, *parent
;
3351 int startpos
, endpos
;
3353 /* This algorithm shifts links around instead of consing and GCing.
3354 The loop invariant is that before_list (resp. after_list) is a
3355 well-formed list except that its last element, the CDR of beforep
3356 (resp. afterp) if beforep (afterp) isn't nil or before_list
3357 (after_list) if it is, is still uninitialized. So it's not a bug
3358 that before_list isn't initialized, although it may look
3360 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3362 XSETMISC (overlay
, tail
);
3364 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3365 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3367 /* If the overlay is backwards, make it empty. */
3368 if (endpos
< startpos
)
3371 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3379 || (startpos
>= start
&& startpos
< end
))
3381 /* Add it to the end of the wrong list. Later on,
3382 recenter_overlay_lists will move it to the right place. */
3383 if (endpos
< current_buffer
->overlay_center
)
3388 afterp
->next
= tail
;
3396 beforep
->next
= tail
;
3400 current_buffer
->overlays_before
= tail
->next
;
3402 parent
->next
= tail
->next
;
3406 parent
= tail
, tail
= parent
->next
;
3408 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3410 XSETMISC (overlay
, tail
);
3412 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3413 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3415 /* If the overlay is backwards, make it empty. */
3416 if (endpos
< startpos
)
3419 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3423 if (startpos
>= end
)
3426 if (startpos
>= start
3427 || (endpos
>= start
&& endpos
< end
))
3429 if (endpos
< current_buffer
->overlay_center
)
3434 afterp
->next
= tail
;
3442 beforep
->next
= tail
;
3446 current_buffer
->overlays_after
= tail
->next
;
3448 parent
->next
= tail
->next
;
3452 parent
= tail
, tail
= parent
->next
;
3455 /* Splice the constructed (wrong) lists into the buffer's lists,
3456 and let the recenter function make it sane again. */
3459 beforep
->next
= current_buffer
->overlays_before
;
3460 current_buffer
->overlays_before
= before_list
;
3462 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3466 afterp
->next
= current_buffer
->overlays_after
;
3467 current_buffer
->overlays_after
= after_list
;
3469 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3472 /* We have two types of overlay: the one whose ending marker is
3473 after-insertion-marker (this is the usual case) and the one whose
3474 ending marker is before-insertion-marker. When `overlays_before'
3475 contains overlays of the latter type and the former type in this
3476 order and both overlays end at inserting position, inserting a text
3477 increases only the ending marker of the latter type, which results
3478 in incorrect ordering of `overlays_before'.
3480 This function fixes ordering of overlays in the slot
3481 `overlays_before' of the buffer *BP. Before the insertion, `point'
3482 was at PREV, and now is at POS. */
3485 fix_overlays_before (bp
, prev
, pos
)
3487 EMACS_INT prev
, pos
;
3489 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3490 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3494 /* After the insertion, the several overlays may be in incorrect
3495 order. The possibility is that, in the list `overlays_before',
3496 an overlay which ends at POS appears after an overlay which ends
3497 at PREV. Since POS is greater than PREV, we must fix the
3498 ordering of these overlays, by moving overlays ends at POS before
3499 the overlays ends at PREV. */
3501 /* At first, find a place where disordered overlays should be linked
3502 in. It is where an overlay which end before POS exists. (i.e. an
3503 overlay whose ending marker is after-insertion-marker if disorder
3506 && (XSETMISC (tem
, tail
),
3507 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3513 /* If we don't find such an overlay,
3514 or the found one ends before PREV,
3515 or the found one is the last one in the list,
3516 we don't have to fix anything. */
3517 if (!tail
|| end
< prev
|| !tail
->next
)
3520 right_pair
= parent
;
3524 /* Now, end position of overlays in the list TAIL should be before
3525 or equal to PREV. In the loop, an overlay which ends at POS is
3526 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3527 we found an overlay which ends before PREV, the remaining
3528 overlays are in correct order. */
3531 XSETMISC (tem
, tail
);
3532 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3535 { /* This overlay is disordered. */
3536 struct Lisp_Overlay
*found
= tail
;
3538 /* Unlink the found overlay. */
3540 parent
->next
= tail
;
3541 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3542 and link it into the right place. */
3545 found
->next
= bp
->overlays_before
;
3546 bp
->overlays_before
= found
;
3550 found
->next
= right_pair
->next
;
3551 right_pair
->next
= found
;
3554 else if (end
== prev
)
3559 else /* No more disordered overlay. */
3564 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3565 doc
: /* Return t if OBJECT is an overlay. */)
3569 return (OVERLAYP (object
) ? Qt
: Qnil
);
3572 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3573 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3574 If omitted, BUFFER defaults to the current buffer.
3575 BEG and END may be integers or markers.
3576 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3577 for the front of the overlay advance when text is inserted there
3578 (which means the text *is not* included in the overlay).
3579 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3580 for the rear of the overlay advance when text is inserted there
3581 (which means the text *is* included in the overlay). */)
3582 (beg
, end
, buffer
, front_advance
, rear_advance
)
3583 Lisp_Object beg
, end
, buffer
;
3584 Lisp_Object front_advance
, rear_advance
;
3586 Lisp_Object overlay
;
3590 XSETBUFFER (buffer
, current_buffer
);
3592 CHECK_BUFFER (buffer
);
3594 && ! EQ (Fmarker_buffer (beg
), buffer
))
3595 error ("Marker points into wrong buffer");
3597 && ! EQ (Fmarker_buffer (end
), buffer
))
3598 error ("Marker points into wrong buffer");
3600 CHECK_NUMBER_COERCE_MARKER (beg
);
3601 CHECK_NUMBER_COERCE_MARKER (end
);
3603 if (XINT (beg
) > XINT (end
))
3606 temp
= beg
; beg
= end
; end
= temp
;
3609 b
= XBUFFER (buffer
);
3611 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3612 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3614 if (!NILP (front_advance
))
3615 XMARKER (beg
)->insertion_type
= 1;
3616 if (!NILP (rear_advance
))
3617 XMARKER (end
)->insertion_type
= 1;
3619 overlay
= allocate_misc ();
3620 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3621 XOVERLAY (overlay
)->start
= beg
;
3622 XOVERLAY (overlay
)->end
= end
;
3623 XOVERLAY (overlay
)->plist
= Qnil
;
3624 XOVERLAY (overlay
)->next
= NULL
;
3626 /* Put the new overlay on the wrong list. */
3627 end
= OVERLAY_END (overlay
);
3628 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3630 if (b
->overlays_after
)
3631 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3632 b
->overlays_after
= XOVERLAY (overlay
);
3636 if (b
->overlays_before
)
3637 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3638 b
->overlays_before
= XOVERLAY (overlay
);
3641 /* This puts it in the right list, and in the right order. */
3642 recenter_overlay_lists (b
, b
->overlay_center
);
3644 /* We don't need to redisplay the region covered by the overlay, because
3645 the overlay has no properties at the moment. */
3650 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3653 modify_overlay (buf
, start
, end
)
3655 EMACS_INT start
, end
;
3664 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3666 /* If this is a buffer not in the selected window,
3667 we must do other windows. */
3668 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3669 windows_or_buffers_changed
= 1;
3670 /* If multiple windows show this buffer, we must do other windows. */
3671 else if (buffer_shared
> 1)
3672 windows_or_buffers_changed
= 1;
3674 ++BUF_OVERLAY_MODIFF (buf
);
3678 Lisp_Object
Fdelete_overlay ();
3680 static struct Lisp_Overlay
*
3681 unchain_overlay (list
, overlay
)
3682 struct Lisp_Overlay
*list
, *overlay
;
3684 struct Lisp_Overlay
*tmp
, *prev
;
3685 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3689 prev
->next
= tmp
->next
;
3692 overlay
->next
= NULL
;
3698 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3699 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3700 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3701 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3703 (overlay
, beg
, end
, buffer
)
3704 Lisp_Object overlay
, beg
, end
, buffer
;
3706 struct buffer
*b
, *ob
;
3707 Lisp_Object obuffer
;
3708 int count
= SPECPDL_INDEX ();
3710 CHECK_OVERLAY (overlay
);
3712 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3714 XSETBUFFER (buffer
, current_buffer
);
3715 CHECK_BUFFER (buffer
);
3718 && ! EQ (Fmarker_buffer (beg
), buffer
))
3719 error ("Marker points into wrong buffer");
3721 && ! EQ (Fmarker_buffer (end
), buffer
))
3722 error ("Marker points into wrong buffer");
3724 CHECK_NUMBER_COERCE_MARKER (beg
);
3725 CHECK_NUMBER_COERCE_MARKER (end
);
3727 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3728 return Fdelete_overlay (overlay
);
3730 if (XINT (beg
) > XINT (end
))
3733 temp
= beg
; beg
= end
; end
= temp
;
3736 specbind (Qinhibit_quit
, Qt
);
3738 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3739 b
= XBUFFER (buffer
);
3740 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3742 /* If the overlay has changed buffers, do a thorough redisplay. */
3743 if (!EQ (buffer
, obuffer
))
3745 /* Redisplay where the overlay was. */
3746 if (!NILP (obuffer
))
3751 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3752 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3754 modify_overlay (ob
, o_beg
, o_end
);
3757 /* Redisplay where the overlay is going to be. */
3758 modify_overlay (b
, XINT (beg
), XINT (end
));
3761 /* Redisplay the area the overlay has just left, or just enclosed. */
3765 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3766 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3768 if (o_beg
== XINT (beg
))
3769 modify_overlay (b
, o_end
, XINT (end
));
3770 else if (o_end
== XINT (end
))
3771 modify_overlay (b
, o_beg
, XINT (beg
));
3774 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3775 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3776 modify_overlay (b
, o_beg
, o_end
);
3780 if (!NILP (obuffer
))
3783 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3785 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3786 eassert (XOVERLAY (overlay
)->next
== NULL
);
3789 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3790 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3792 /* Put the overlay on the wrong list. */
3793 end
= OVERLAY_END (overlay
);
3794 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3796 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3797 b
->overlays_after
= XOVERLAY (overlay
);
3801 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3802 b
->overlays_before
= XOVERLAY (overlay
);
3805 /* This puts it in the right list, and in the right order. */
3806 recenter_overlay_lists (b
, b
->overlay_center
);
3808 return unbind_to (count
, overlay
);
3811 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3812 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3814 Lisp_Object overlay
;
3818 int count
= SPECPDL_INDEX ();
3820 CHECK_OVERLAY (overlay
);
3822 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3826 b
= XBUFFER (buffer
);
3827 specbind (Qinhibit_quit
, Qt
);
3829 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3830 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3831 eassert (XOVERLAY (overlay
)->next
== NULL
);
3833 marker_position (OVERLAY_START (overlay
)),
3834 marker_position (OVERLAY_END (overlay
)));
3835 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3836 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3838 /* When deleting an overlay with before or after strings, turn off
3839 display optimizations for the affected buffer, on the basis that
3840 these strings may contain newlines. This is easier to do than to
3841 check for that situation during redisplay. */
3842 if (!windows_or_buffers_changed
3843 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3844 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3845 b
->prevent_redisplay_optimizations_p
= 1;
3847 return unbind_to (count
, Qnil
);
3850 /* Overlay dissection functions. */
3852 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3853 doc
: /* Return the position at which OVERLAY starts. */)
3855 Lisp_Object overlay
;
3857 CHECK_OVERLAY (overlay
);
3859 return (Fmarker_position (OVERLAY_START (overlay
)));
3862 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3863 doc
: /* Return the position at which OVERLAY ends. */)
3865 Lisp_Object overlay
;
3867 CHECK_OVERLAY (overlay
);
3869 return (Fmarker_position (OVERLAY_END (overlay
)));
3872 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3873 doc
: /* Return the buffer OVERLAY belongs to.
3874 Return nil if OVERLAY has been deleted. */)
3876 Lisp_Object overlay
;
3878 CHECK_OVERLAY (overlay
);
3880 return Fmarker_buffer (OVERLAY_START (overlay
));
3883 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3884 doc
: /* Return a list of the properties on OVERLAY.
3885 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3888 Lisp_Object overlay
;
3890 CHECK_OVERLAY (overlay
);
3892 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3896 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3897 doc
: /* Return a list of the overlays that contain position POS. */)
3902 Lisp_Object
*overlay_vec
;
3906 CHECK_NUMBER_COERCE_MARKER (pos
);
3909 /* We can't use alloca here because overlays_at can call xrealloc. */
3910 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3912 /* Put all the overlays we want in a vector in overlay_vec.
3913 Store the length in len. */
3914 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3915 (int *) 0, (int *) 0, 0);
3917 /* Make a list of them all. */
3918 result
= Flist (noverlays
, overlay_vec
);
3920 xfree (overlay_vec
);
3924 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3925 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3926 Overlap means that at least one character is contained within the overlay
3927 and also contained within the specified region.
3928 Empty overlays are included in the result if they are located at BEG
3929 or between BEG and END. */)
3931 Lisp_Object beg
, end
;
3934 Lisp_Object
*overlay_vec
;
3938 CHECK_NUMBER_COERCE_MARKER (beg
);
3939 CHECK_NUMBER_COERCE_MARKER (end
);
3942 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3944 /* Put all the overlays we want in a vector in overlay_vec.
3945 Store the length in len. */
3946 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3947 (int *) 0, (int *) 0);
3949 /* Make a list of them all. */
3950 result
= Flist (noverlays
, overlay_vec
);
3952 xfree (overlay_vec
);
3956 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3958 doc
: /* Return the next position after POS where an overlay starts or ends.
3959 If there are no more overlay boundaries after POS, return (point-max). */)
3965 Lisp_Object
*overlay_vec
;
3969 CHECK_NUMBER_COERCE_MARKER (pos
);
3972 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3974 /* Put all the overlays we want in a vector in overlay_vec.
3975 Store the length in len.
3976 endpos gets the position where the next overlay starts. */
3977 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3978 &endpos
, (int *) 0, 1);
3980 /* If any of these overlays ends before endpos,
3981 use its ending point instead. */
3982 for (i
= 0; i
< noverlays
; i
++)
3987 oend
= OVERLAY_END (overlay_vec
[i
]);
3988 oendpos
= OVERLAY_POSITION (oend
);
3989 if (oendpos
< endpos
)
3993 xfree (overlay_vec
);
3994 return make_number (endpos
);
3997 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3998 Sprevious_overlay_change
, 1, 1, 0,
3999 doc
: /* Return the previous position before POS where an overlay starts or ends.
4000 If there are no more overlay boundaries before POS, return (point-min). */)
4006 Lisp_Object
*overlay_vec
;
4009 CHECK_NUMBER_COERCE_MARKER (pos
);
4011 /* At beginning of buffer, we know the answer;
4012 avoid bug subtracting 1 below. */
4013 if (XINT (pos
) == BEGV
)
4017 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4019 /* Put all the overlays we want in a vector in overlay_vec.
4020 Store the length in len.
4021 prevpos gets the position of the previous change. */
4022 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4023 (int *) 0, &prevpos
, 1);
4025 xfree (overlay_vec
);
4026 return make_number (prevpos
);
4029 /* These functions are for debugging overlays. */
4031 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4032 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4033 The car has all the overlays before the overlay center;
4034 the cdr has all the overlays after the overlay center.
4035 Recentering overlays moves overlays between these lists.
4036 The lists you get are copies, so that changing them has no effect.
4037 However, the overlays you get are the real objects that the buffer uses. */)
4040 struct Lisp_Overlay
*ol
;
4041 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4042 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4045 before
= Fcons (tmp
, before
);
4047 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4050 after
= Fcons (tmp
, after
);
4052 return Fcons (Fnreverse (before
), Fnreverse (after
));
4055 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4056 doc
: /* Recenter the overlays of the current buffer around position POS.
4057 That makes overlay lookup faster for positions near POS (but perhaps slower
4058 for positions far away from POS). */)
4062 CHECK_NUMBER_COERCE_MARKER (pos
);
4064 recenter_overlay_lists (current_buffer
, XINT (pos
));
4068 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4069 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4071 Lisp_Object overlay
, prop
;
4073 CHECK_OVERLAY (overlay
);
4074 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4077 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4078 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4079 (overlay
, prop
, value
)
4080 Lisp_Object overlay
, prop
, value
;
4082 Lisp_Object tail
, buffer
;
4085 CHECK_OVERLAY (overlay
);
4087 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4089 for (tail
= XOVERLAY (overlay
)->plist
;
4090 CONSP (tail
) && CONSP (XCDR (tail
));
4091 tail
= XCDR (XCDR (tail
)))
4092 if (EQ (XCAR (tail
), prop
))
4094 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4095 XSETCAR (XCDR (tail
), value
);
4098 /* It wasn't in the list, so add it to the front. */
4099 changed
= !NILP (value
);
4100 XOVERLAY (overlay
)->plist
4101 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4103 if (! NILP (buffer
))
4106 modify_overlay (XBUFFER (buffer
),
4107 marker_position (OVERLAY_START (overlay
)),
4108 marker_position (OVERLAY_END (overlay
)));
4109 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4110 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4111 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4112 Fdelete_overlay (overlay
);
4117 /* Subroutine of report_overlay_modification. */
4119 /* Lisp vector holding overlay hook functions to call.
4120 Vector elements come in pairs.
4121 Each even-index element is a list of hook functions.
4122 The following odd-index element is the overlay they came from.
4124 Before the buffer change, we fill in this vector
4125 as we call overlay hook functions.
4126 After the buffer change, we get the functions to call from this vector.
4127 This way we always call the same functions before and after the change. */
4128 static Lisp_Object last_overlay_modification_hooks
;
4130 /* Number of elements actually used in last_overlay_modification_hooks. */
4131 static int last_overlay_modification_hooks_used
;
4133 /* Add one functionlist/overlay pair
4134 to the end of last_overlay_modification_hooks. */
4137 add_overlay_mod_hooklist (functionlist
, overlay
)
4138 Lisp_Object functionlist
, overlay
;
4140 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4142 if (last_overlay_modification_hooks_used
== oldsize
)
4145 old
= last_overlay_modification_hooks
;
4146 last_overlay_modification_hooks
4147 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
4148 bcopy (XVECTOR (old
)->contents
,
4149 XVECTOR (last_overlay_modification_hooks
)->contents
,
4150 sizeof (Lisp_Object
) * oldsize
);
4152 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = functionlist
;
4153 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = overlay
;
4156 /* Run the modification-hooks of overlays that include
4157 any part of the text in START to END.
4158 If this change is an insertion, also
4159 run the insert-before-hooks of overlay starting at END,
4160 and the insert-after-hooks of overlay ending at START.
4162 This is called both before and after the modification.
4163 AFTER is nonzero when we call after the modification.
4165 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4166 When AFTER is nonzero, they are the start position,
4167 the position after the inserted new text,
4168 and the length of deleted or replaced old text. */
4171 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4172 Lisp_Object start
, end
;
4174 Lisp_Object arg1
, arg2
, arg3
;
4176 Lisp_Object prop
, overlay
;
4177 struct Lisp_Overlay
*tail
;
4178 /* 1 if this change is an insertion. */
4179 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4180 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4185 /* We used to run the functions as soon as we found them and only register
4186 them in last_overlay_modification_hooks for the purpose of the `after'
4187 case. But running elisp code as we traverse the list of overlays is
4188 painful because the list can be modified by the elisp code so we had to
4189 copy at several places. We now simply do a read-only traversal that
4190 only collects the functions to run and we run them afterwards. It's
4191 simpler, especially since all the code was already there. -stef */
4195 /* We are being called before a change.
4196 Scan the overlays to find the functions to call. */
4197 last_overlay_modification_hooks_used
= 0;
4198 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4200 int startpos
, endpos
;
4201 Lisp_Object ostart
, oend
;
4203 XSETMISC (overlay
, tail
);
4205 ostart
= OVERLAY_START (overlay
);
4206 oend
= OVERLAY_END (overlay
);
4207 endpos
= OVERLAY_POSITION (oend
);
4208 if (XFASTINT (start
) > endpos
)
4210 startpos
= OVERLAY_POSITION (ostart
);
4211 if (insertion
&& (XFASTINT (start
) == startpos
4212 || XFASTINT (end
) == startpos
))
4214 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4216 add_overlay_mod_hooklist (prop
, overlay
);
4218 if (insertion
&& (XFASTINT (start
) == endpos
4219 || XFASTINT (end
) == endpos
))
4221 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4223 add_overlay_mod_hooklist (prop
, overlay
);
4225 /* Test for intersecting intervals. This does the right thing
4226 for both insertion and deletion. */
4227 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4229 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4231 add_overlay_mod_hooklist (prop
, overlay
);
4235 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4237 int startpos
, endpos
;
4238 Lisp_Object ostart
, oend
;
4240 XSETMISC (overlay
, tail
);
4242 ostart
= OVERLAY_START (overlay
);
4243 oend
= OVERLAY_END (overlay
);
4244 startpos
= OVERLAY_POSITION (ostart
);
4245 endpos
= OVERLAY_POSITION (oend
);
4246 if (XFASTINT (end
) < startpos
)
4248 if (insertion
&& (XFASTINT (start
) == startpos
4249 || XFASTINT (end
) == startpos
))
4251 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4253 add_overlay_mod_hooklist (prop
, overlay
);
4255 if (insertion
&& (XFASTINT (start
) == endpos
4256 || XFASTINT (end
) == endpos
))
4258 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4260 add_overlay_mod_hooklist (prop
, overlay
);
4262 /* Test for intersecting intervals. This does the right thing
4263 for both insertion and deletion. */
4264 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4266 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4268 add_overlay_mod_hooklist (prop
, overlay
);
4273 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4275 /* Call the functions recorded in last_overlay_modification_hooks.
4276 First copy the vector contents, in case some of these hooks
4277 do subsequent modification of the buffer. */
4278 int size
= last_overlay_modification_hooks_used
;
4279 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4282 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4283 copy
, size
* sizeof (Lisp_Object
));
4285 gcpro1
.nvars
= size
;
4287 for (i
= 0; i
< size
;)
4289 Lisp_Object prop
, overlay
;
4291 overlay
= copy
[i
++];
4292 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4299 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4300 Lisp_Object list
, overlay
;
4302 Lisp_Object arg1
, arg2
, arg3
;
4304 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4306 GCPRO4 (list
, arg1
, arg2
, arg3
);
4308 while (CONSP (list
))
4311 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4313 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4319 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4322 evaporate_overlays (pos
)
4325 Lisp_Object overlay
, hit_list
;
4326 struct Lisp_Overlay
*tail
;
4329 if (pos
<= current_buffer
->overlay_center
)
4330 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4333 XSETMISC (overlay
, tail
);
4334 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4337 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4338 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4339 hit_list
= Fcons (overlay
, hit_list
);
4342 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4345 XSETMISC (overlay
, tail
);
4346 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4349 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4350 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4351 hit_list
= Fcons (overlay
, hit_list
);
4353 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4354 Fdelete_overlay (XCAR (hit_list
));
4357 /* Somebody has tried to store a value with an unacceptable type
4358 in the slot with offset OFFSET. */
4361 buffer_slot_type_mismatch (offset
)
4367 switch (XINT (PER_BUFFER_TYPE (offset
)))
4370 type_name
= "integers";
4374 type_name
= "strings";
4378 type_name
= "symbols";
4385 sym
= PER_BUFFER_SYMBOL (offset
);
4386 error ("Only %s should be stored in the buffer-local variable %s",
4387 type_name
, SDATA (SYMBOL_NAME (sym
)));
4391 /***********************************************************************
4392 Allocation with mmap
4393 ***********************************************************************/
4395 #ifdef USE_MMAP_FOR_BUFFERS
4397 #include <sys/types.h>
4398 #include <sys/mman.h>
4401 #ifdef MAP_ANONYMOUS
4402 #define MAP_ANON MAP_ANONYMOUS
4409 #define MAP_FAILED ((void *) -1)
4422 /* Memory is allocated in regions which are mapped using mmap(2).
4423 The current implementation lets the system select mapped
4424 addresses; we're not using MAP_FIXED in general, except when
4425 trying to enlarge regions.
4427 Each mapped region starts with a mmap_region structure, the user
4428 area starts after that structure, aligned to MEM_ALIGN.
4430 +-----------------------+
4431 | struct mmap_info + |
4433 +-----------------------+
4437 +-----------------------+ */
4441 /* User-specified size. */
4442 size_t nbytes_specified
;
4444 /* Number of bytes mapped */
4445 size_t nbytes_mapped
;
4447 /* Pointer to the location holding the address of the memory
4448 allocated with the mmap'd block. The variable actually points
4449 after this structure. */
4452 /* Next and previous in list of all mmap'd regions. */
4453 struct mmap_region
*next
, *prev
;
4456 /* Doubly-linked list of mmap'd regions. */
4458 static struct mmap_region
*mmap_regions
;
4460 /* File descriptor for mmap. If we don't have anonymous mapping,
4461 /dev/zero will be opened on it. */
4465 /* Temporary storage for mmap_set_vars, see there. */
4467 static struct mmap_region
*mmap_regions_1
;
4468 static int mmap_fd_1
;
4470 /* Page size on this system. */
4472 static int mmap_page_size
;
4474 /* 1 means mmap has been intialized. */
4476 static int mmap_initialized_p
;
4478 /* Value is X rounded up to the next multiple of N. */
4480 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4482 /* Size of mmap_region structure plus padding. */
4484 #define MMAP_REGION_STRUCT_SIZE \
4485 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4487 /* Given a pointer P to the start of the user-visible part of a mapped
4488 region, return a pointer to the start of the region. */
4490 #define MMAP_REGION(P) \
4491 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4493 /* Given a pointer P to the start of a mapped region, return a pointer
4494 to the start of the user-visible part of the region. */
4496 #define MMAP_USER_AREA(P) \
4497 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4499 #define MEM_ALIGN sizeof (double)
4501 /* Predicate returning true if part of the address range [START .. END]
4502 is currently mapped. Used to prevent overwriting an existing
4505 Default is to conservativly assume the address range is occupied by
4506 something else. This can be overridden by system configuration
4507 files if system-specific means to determine this exists. */
4509 #ifndef MMAP_ALLOCATED_P
4510 #define MMAP_ALLOCATED_P(start, end) 1
4513 /* Function prototypes. */
4515 static int mmap_free_1
P_ ((struct mmap_region
*));
4516 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4517 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4518 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4519 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4520 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4521 static void mmap_init
P_ ((void));
4524 /* Return a region overlapping address range START...END, or null if
4525 none. END is not including, i.e. the last byte in the range
4528 static struct mmap_region
*
4529 mmap_find (start
, end
)
4530 POINTER_TYPE
*start
, *end
;
4532 struct mmap_region
*r
;
4533 char *s
= (char *) start
, *e
= (char *) end
;
4535 for (r
= mmap_regions
; r
; r
= r
->next
)
4537 char *rstart
= (char *) r
;
4538 char *rend
= rstart
+ r
->nbytes_mapped
;
4540 if (/* First byte of range, i.e. START, in this region? */
4541 (s
>= rstart
&& s
< rend
)
4542 /* Last byte of range, i.e. END - 1, in this region? */
4543 || (e
> rstart
&& e
<= rend
)
4544 /* First byte of this region in the range? */
4545 || (rstart
>= s
&& rstart
< e
)
4546 /* Last byte of this region in the range? */
4547 || (rend
> s
&& rend
<= e
))
4555 /* Unmap a region. P is a pointer to the start of the user-araa of
4556 the region. Value is non-zero if successful. */
4560 struct mmap_region
*r
;
4563 r
->next
->prev
= r
->prev
;
4565 r
->prev
->next
= r
->next
;
4567 mmap_regions
= r
->next
;
4569 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4571 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4579 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4580 Value is non-zero if successful. */
4583 mmap_enlarge (r
, npages
)
4584 struct mmap_region
*r
;
4587 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4593 /* Unmap pages at the end of the region. */
4594 nbytes
= - npages
* mmap_page_size
;
4595 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4596 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4599 r
->nbytes_mapped
-= nbytes
;
4603 else if (npages
> 0)
4605 nbytes
= npages
* mmap_page_size
;
4607 /* Try to map additional pages at the end of the region. We
4608 cannot do this if the address range is already occupied by
4609 something else because mmap deletes any previous mapping.
4610 I'm not sure this is worth doing, let's see. */
4611 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4615 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4616 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4617 if (p
== MAP_FAILED
)
4618 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4619 else if (p
!= (POINTER_TYPE
*) region_end
)
4621 /* Kernels are free to choose a different address. In
4622 that case, unmap what we've mapped above; we have
4624 if (munmap (p
, nbytes
) == -1)
4625 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4629 r
->nbytes_mapped
+= nbytes
;
4639 /* Set or reset variables holding references to mapped regions. If
4640 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4641 non-zero, set all variables to the start of the user-areas
4644 This function is called from Fdump_emacs to ensure that the dumped
4645 Emacs doesn't contain references to memory that won't be mapped
4646 when Emacs starts. */
4649 mmap_set_vars (restore_p
)
4652 struct mmap_region
*r
;
4656 mmap_regions
= mmap_regions_1
;
4657 mmap_fd
= mmap_fd_1
;
4658 for (r
= mmap_regions
; r
; r
= r
->next
)
4659 *r
->var
= MMAP_USER_AREA (r
);
4663 for (r
= mmap_regions
; r
; r
= r
->next
)
4665 mmap_regions_1
= mmap_regions
;
4666 mmap_regions
= NULL
;
4667 mmap_fd_1
= mmap_fd
;
4673 /* Allocate a block of storage large enough to hold NBYTES bytes of
4674 data. A pointer to the data is returned in *VAR. VAR is thus the
4675 address of some variable which will use the data area.
4677 The allocation of 0 bytes is valid.
4679 If we can't allocate the necessary memory, set *VAR to null, and
4682 static POINTER_TYPE
*
4683 mmap_alloc (var
, nbytes
)
4692 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4693 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4696 if (p
== MAP_FAILED
)
4698 if (errno
!= ENOMEM
)
4699 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4704 struct mmap_region
*r
= (struct mmap_region
*) p
;
4706 r
->nbytes_specified
= nbytes
;
4707 r
->nbytes_mapped
= map
;
4710 r
->next
= mmap_regions
;
4715 p
= MMAP_USER_AREA (p
);
4722 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4723 resize it to size NBYTES. Change *VAR to reflect the new block,
4724 and return this value. If more memory cannot be allocated, then
4725 leave *VAR unchanged, and return null. */
4727 static POINTER_TYPE
*
4728 mmap_realloc (var
, nbytes
)
4732 POINTER_TYPE
*result
;
4737 result
= mmap_alloc (var
, nbytes
);
4738 else if (nbytes
== 0)
4741 result
= mmap_alloc (var
, nbytes
);
4745 struct mmap_region
*r
= MMAP_REGION (*var
);
4746 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4751 POINTER_TYPE
*old_ptr
= *var
;
4753 /* Try to map additional pages at the end of the region.
4754 If that fails, allocate a new region, copy data
4755 from the old region, then free it. */
4756 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4759 r
->nbytes_specified
= nbytes
;
4760 *var
= result
= old_ptr
;
4762 else if (mmap_alloc (var
, nbytes
))
4764 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4765 mmap_free_1 (MMAP_REGION (old_ptr
));
4767 r
= MMAP_REGION (result
);
4768 r
->nbytes_specified
= nbytes
;
4776 else if (room
- nbytes
>= mmap_page_size
)
4778 /* Shrinking by at least a page. Let's give some
4779 memory back to the system.
4781 The extra parens are to make the division happens first,
4782 on positive values, so we know it will round towards
4784 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4786 r
->nbytes_specified
= nbytes
;
4790 /* Leave it alone. */
4792 r
->nbytes_specified
= nbytes
;
4800 /* Free a block of relocatable storage whose data is pointed to by
4801 PTR. Store 0 in *PTR to show there's no block allocated. */
4811 mmap_free_1 (MMAP_REGION (*var
));
4817 /* Perform necessary intializations for the use of mmap. */
4823 /* The value of mmap_fd is initially 0 in temacs, and -1
4824 in a dumped Emacs. */
4827 /* No anonymous mmap -- we need the file descriptor. */
4828 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4830 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4832 #endif /* MAP_ANON == 0 */
4834 if (mmap_initialized_p
)
4836 mmap_initialized_p
= 1;
4842 mmap_page_size
= getpagesize ();
4845 #endif /* USE_MMAP_FOR_BUFFERS */
4849 /***********************************************************************
4850 Buffer-text Allocation
4851 ***********************************************************************/
4854 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4855 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4856 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4857 #endif /* REL_ALLOC */
4860 /* Allocate NBYTES bytes for buffer B's text buffer. */
4863 alloc_buffer_text (b
, nbytes
)
4870 #if defined USE_MMAP_FOR_BUFFERS
4871 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4872 #elif defined REL_ALLOC
4873 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4875 p
= xmalloc (nbytes
);
4884 b
->text
->beg
= (unsigned char *) p
;
4888 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4892 enlarge_buffer_text (b
, delta
)
4897 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4900 #if defined USE_MMAP_FOR_BUFFERS
4901 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4902 #elif defined REL_ALLOC
4903 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4905 p
= xrealloc (b
->text
->beg
, nbytes
);
4914 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4919 /* Free buffer B's text buffer. */
4922 free_buffer_text (b
)
4927 #if defined USE_MMAP_FOR_BUFFERS
4928 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4929 #elif defined REL_ALLOC
4930 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4932 xfree (b
->text
->beg
);
4935 BUF_BEG_ADDR (b
) = NULL
;
4941 /***********************************************************************
4943 ***********************************************************************/
4950 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4952 /* Make sure all markable slots in buffer_defaults
4953 are initialized reasonably, so mark_buffer won't choke. */
4954 reset_buffer (&buffer_defaults
);
4955 reset_buffer_local_variables (&buffer_defaults
, 1);
4956 reset_buffer (&buffer_local_symbols
);
4957 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4958 /* Prevent GC from getting confused. */
4959 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4960 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4961 BUF_INTERVALS (&buffer_defaults
) = 0;
4962 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4963 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4964 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4966 /* Set up the default values of various buffer slots. */
4967 /* Must do these before making the first buffer! */
4969 /* real setup is done in bindings.el */
4970 buffer_defaults
.mode_line_format
= build_string ("%-");
4971 buffer_defaults
.header_line_format
= Qnil
;
4972 buffer_defaults
.abbrev_mode
= Qnil
;
4973 buffer_defaults
.overwrite_mode
= Qnil
;
4974 buffer_defaults
.case_fold_search
= Qt
;
4975 buffer_defaults
.auto_fill_function
= Qnil
;
4976 buffer_defaults
.selective_display
= Qnil
;
4978 buffer_defaults
.selective_display_ellipses
= Qt
;
4980 buffer_defaults
.abbrev_table
= Qnil
;
4981 buffer_defaults
.display_table
= Qnil
;
4982 buffer_defaults
.undo_list
= Qnil
;
4983 buffer_defaults
.mark_active
= Qnil
;
4984 buffer_defaults
.file_format
= Qnil
;
4985 buffer_defaults
.auto_save_file_format
= Qt
;
4986 buffer_defaults
.overlays_before
= NULL
;
4987 buffer_defaults
.overlays_after
= NULL
;
4988 buffer_defaults
.overlay_center
= BEG
;
4990 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4991 buffer_defaults
.truncate_lines
= Qnil
;
4992 buffer_defaults
.ctl_arrow
= Qt
;
4993 buffer_defaults
.direction_reversed
= Qnil
;
4994 buffer_defaults
.cursor_type
= Qt
;
4995 buffer_defaults
.extra_line_spacing
= Qnil
;
4996 buffer_defaults
.cursor_in_non_selected_windows
= Qt
;
4999 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
5001 buffer_defaults
.enable_multibyte_characters
= Qt
;
5002 buffer_defaults
.buffer_file_coding_system
= Qnil
;
5003 XSETFASTINT (buffer_defaults
.fill_column
, 70);
5004 XSETFASTINT (buffer_defaults
.left_margin
, 0);
5005 buffer_defaults
.cache_long_line_scans
= Qnil
;
5006 buffer_defaults
.file_truename
= Qnil
;
5007 XSETFASTINT (buffer_defaults
.display_count
, 0);
5008 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
5009 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
5010 buffer_defaults
.left_fringe_width
= Qnil
;
5011 buffer_defaults
.right_fringe_width
= Qnil
;
5012 buffer_defaults
.fringes_outside_margins
= Qnil
;
5013 buffer_defaults
.scroll_bar_width
= Qnil
;
5014 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
5015 buffer_defaults
.indicate_empty_lines
= Qnil
;
5016 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
5017 buffer_defaults
.scroll_up_aggressively
= Qnil
;
5018 buffer_defaults
.scroll_down_aggressively
= Qnil
;
5019 buffer_defaults
.display_time
= Qnil
;
5021 /* Assign the local-flags to the slots that have default values.
5022 The local flag is a bit that is used in the buffer
5023 to say that it has its own local value for the slot.
5024 The local flag bits are in the local_var_flags slot of the buffer. */
5026 /* Nothing can work if this isn't true */
5027 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
5029 /* 0 means not a lisp var, -1 means always local, else mask */
5030 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
5031 XSETINT (buffer_local_flags
.filename
, -1);
5032 XSETINT (buffer_local_flags
.directory
, -1);
5033 XSETINT (buffer_local_flags
.backed_up
, -1);
5034 XSETINT (buffer_local_flags
.save_length
, -1);
5035 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
5036 XSETINT (buffer_local_flags
.read_only
, -1);
5037 XSETINT (buffer_local_flags
.major_mode
, -1);
5038 XSETINT (buffer_local_flags
.mode_name
, -1);
5039 XSETINT (buffer_local_flags
.undo_list
, -1);
5040 XSETINT (buffer_local_flags
.mark_active
, -1);
5041 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
5042 XSETINT (buffer_local_flags
.file_truename
, -1);
5043 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
5044 XSETINT (buffer_local_flags
.file_format
, -1);
5045 XSETINT (buffer_local_flags
.auto_save_file_format
, -1);
5046 XSETINT (buffer_local_flags
.display_count
, -1);
5047 XSETINT (buffer_local_flags
.display_time
, -1);
5048 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
5051 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
5052 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
5053 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5054 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5055 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5056 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5058 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5060 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5061 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5062 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5063 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5064 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5065 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5066 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5068 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5069 /* Make this one a permanent local. */
5070 buffer_permanent_local_flags
[idx
++] = 1;
5072 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5073 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5074 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5075 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
5076 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5077 /* Make this one a permanent local. */
5078 buffer_permanent_local_flags
[idx
++] = 1;
5079 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5080 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5081 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5082 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5083 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5084 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5085 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5086 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5087 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5088 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5089 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5090 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5091 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5092 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5093 XSETFASTINT (buffer_local_flags
.cursor_in_non_selected_windows
, idx
); ++idx
;
5095 /* Need more room? */
5096 if (idx
>= MAX_PER_BUFFER_VARS
)
5098 last_per_buffer_idx
= idx
;
5100 Vbuffer_alist
= Qnil
;
5104 QSFundamental
= build_string ("Fundamental");
5106 Qfundamental_mode
= intern ("fundamental-mode");
5107 buffer_defaults
.major_mode
= Qfundamental_mode
;
5109 Qmode_class
= intern ("mode-class");
5111 Qprotected_field
= intern ("protected-field");
5113 Qpermanent_local
= intern ("permanent-local");
5115 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5116 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5118 Qucs_set_table_for_input
= intern ("ucs-set-table-for-input");
5120 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
5122 /* super-magic invisible buffer */
5123 Vbuffer_alist
= Qnil
;
5125 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5127 inhibit_modification_hooks
= 0;
5133 char buf
[MAXPATHLEN
+ 1];
5135 struct stat dotstat
, pwdstat
;
5139 #ifdef USE_MMAP_FOR_BUFFERS
5141 /* When using the ralloc implementation based on mmap(2), buffer
5142 text pointers will have been set to null in the dumped Emacs.
5146 for (b
= all_buffers
; b
; b
= b
->next
)
5147 if (b
->text
->beg
== NULL
)
5148 enlarge_buffer_text (b
, 0);
5150 #endif /* USE_MMAP_FOR_BUFFERS */
5152 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5153 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5154 Fset_buffer_multibyte (Qnil
);
5156 /* If PWD is accurate, use it instead of calling getwd. PWD is
5157 sometimes a nicer name, and using it may avoid a fatal error if a
5158 parent directory is searchable but not readable. */
5159 if ((pwd
= getenv ("PWD")) != 0
5160 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
5161 && stat (pwd
, &pwdstat
) == 0
5162 && stat (".", &dotstat
) == 0
5163 && dotstat
.st_ino
== pwdstat
.st_ino
5164 && dotstat
.st_dev
== pwdstat
.st_dev
5165 && strlen (pwd
) < MAXPATHLEN
)
5168 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
5169 fatal ("`getcwd' failed: %s\n", strerror (errno
));
5171 else if (getwd (buf
) == 0)
5172 fatal ("`getwd' failed: %s\n", buf
);
5176 /* Maybe this should really use some standard subroutine
5177 whose definition is filename syntax dependent. */
5179 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
5181 buf
[rc
] = DIRECTORY_SEP
;
5184 #endif /* not VMS */
5186 current_buffer
->directory
= make_unibyte_string (buf
, strlen (buf
));
5187 if (! NILP (buffer_defaults
.enable_multibyte_characters
))
5188 /* At this momemnt, we still don't know how to decode the
5189 direcotry name. So, we keep the bytes in multibyte form so
5190 that ENCODE_FILE correctly gets the original bytes. */
5191 current_buffer
->directory
5192 = string_to_multibyte (current_buffer
->directory
);
5194 /* Add /: to the front of the name
5195 if it would otherwise be treated as magic. */
5196 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5198 /* If the default dir is just /, TEMP is non-nil
5199 because of the ange-ftp completion handler.
5200 However, it is not necessary to turn / into /:/.
5201 So avoid doing that. */
5202 && strcmp ("/", SDATA (current_buffer
->directory
)))
5203 current_buffer
->directory
5204 = concat2 (build_string ("/:"), current_buffer
->directory
);
5206 temp
= get_minibuffer (0);
5207 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5210 /* initialize the buffer routines */
5214 staticpro (&last_overlay_modification_hooks
);
5215 last_overlay_modification_hooks
5216 = Fmake_vector (make_number (10), Qnil
);
5218 staticpro (&Vbuffer_defaults
);
5219 staticpro (&Vbuffer_local_symbols
);
5220 staticpro (&Qfundamental_mode
);
5221 staticpro (&Qmode_class
);
5222 staticpro (&QSFundamental
);
5223 staticpro (&Vbuffer_alist
);
5224 staticpro (&Qprotected_field
);
5225 staticpro (&Qpermanent_local
);
5226 staticpro (&Qkill_buffer_hook
);
5227 Qoverlayp
= intern ("overlayp");
5228 staticpro (&Qoverlayp
);
5229 Qevaporate
= intern ("evaporate");
5230 staticpro (&Qevaporate
);
5231 Qmodification_hooks
= intern ("modification-hooks");
5232 staticpro (&Qmodification_hooks
);
5233 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5234 staticpro (&Qinsert_in_front_hooks
);
5235 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5236 staticpro (&Qinsert_behind_hooks
);
5237 Qget_file_buffer
= intern ("get-file-buffer");
5238 staticpro (&Qget_file_buffer
);
5239 Qpriority
= intern ("priority");
5240 staticpro (&Qpriority
);
5241 Qwindow
= intern ("window");
5242 staticpro (&Qwindow
);
5243 Qbefore_string
= intern ("before-string");
5244 staticpro (&Qbefore_string
);
5245 Qafter_string
= intern ("after-string");
5246 staticpro (&Qafter_string
);
5247 Qfirst_change_hook
= intern ("first-change-hook");
5248 staticpro (&Qfirst_change_hook
);
5249 Qbefore_change_functions
= intern ("before-change-functions");
5250 staticpro (&Qbefore_change_functions
);
5251 Qafter_change_functions
= intern ("after-change-functions");
5252 staticpro (&Qafter_change_functions
);
5253 staticpro (&Qucs_set_table_for_input
);
5255 Qkill_buffer_query_functions
= intern ("kill-buffer-query-functions");
5256 staticpro (&Qkill_buffer_query_functions
);
5258 Fput (Qprotected_field
, Qerror_conditions
,
5259 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5260 Fput (Qprotected_field
, Qerror_message
,
5261 build_string ("Attempt to modify a protected field"));
5263 /* All these use DEFVAR_LISP_NOPRO because the slots in
5264 buffer_defaults will all be marked via Vbuffer_defaults. */
5266 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5267 &buffer_defaults
.mode_line_format
,
5268 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5269 This is the same as (default-value 'mode-line-format). */);
5271 DEFVAR_LISP_NOPRO ("default-header-line-format",
5272 &buffer_defaults
.header_line_format
,
5273 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5274 This is the same as (default-value 'header-line-format). */);
5276 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5277 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5278 This is the same as (default-value 'cursor-type). */);
5280 DEFVAR_LISP_NOPRO ("default-line-spacing",
5281 &buffer_defaults
.extra_line_spacing
,
5282 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5283 This is the same as (default-value 'line-spacing). */);
5285 DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows",
5286 &buffer_defaults
.cursor_in_non_selected_windows
,
5287 doc
: /* Default value of `cursor-in-non-selected-windows'.
5288 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5290 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5291 &buffer_defaults
.abbrev_mode
,
5292 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5293 This is the same as (default-value 'abbrev-mode). */);
5295 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5296 &buffer_defaults
.ctl_arrow
,
5297 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5298 This is the same as (default-value 'ctl-arrow). */);
5300 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5301 &buffer_defaults
.direction_reversed
,
5302 doc
: /* Default value of `direction-reversed' for buffers that do not override it.
5303 This is the same as (default-value 'direction-reversed). */);
5305 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5306 &buffer_defaults
.enable_multibyte_characters
,
5307 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5308 This is the same as (default-value 'enable-multibyte-characters). */);
5310 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5311 &buffer_defaults
.buffer_file_coding_system
,
5312 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5313 This is the same as (default-value 'buffer-file-coding-system). */);
5315 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5316 &buffer_defaults
.truncate_lines
,
5317 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5318 This is the same as (default-value 'truncate-lines). */);
5320 DEFVAR_LISP_NOPRO ("default-fill-column",
5321 &buffer_defaults
.fill_column
,
5322 doc
: /* Default value of `fill-column' for buffers that do not override it.
5323 This is the same as (default-value 'fill-column). */);
5325 DEFVAR_LISP_NOPRO ("default-left-margin",
5326 &buffer_defaults
.left_margin
,
5327 doc
: /* Default value of `left-margin' for buffers that do not override it.
5328 This is the same as (default-value 'left-margin). */);
5330 DEFVAR_LISP_NOPRO ("default-tab-width",
5331 &buffer_defaults
.tab_width
,
5332 doc
: /* Default value of `tab-width' for buffers that do not override it.
5333 This is the same as (default-value 'tab-width). */);
5335 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5336 &buffer_defaults
.case_fold_search
,
5337 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5338 This is the same as (default-value 'case-fold-search). */);
5341 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5342 &buffer_defaults
.buffer_file_type
,
5343 doc
: /* Default file type for buffers that do not override it.
5344 This is the same as (default-value 'buffer-file-type).
5345 The file type is nil for text, t for binary. */);
5348 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5349 &buffer_defaults
.left_margin_cols
,
5350 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5351 This is the same as (default-value 'left-margin-width). */);
5353 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5354 &buffer_defaults
.right_margin_cols
,
5355 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5356 This is the same as (default-value 'right-margin-width). */);
5358 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5359 &buffer_defaults
.left_fringe_width
,
5360 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5361 This is the same as (default-value 'left-fringe-width). */);
5363 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5364 &buffer_defaults
.right_fringe_width
,
5365 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5366 This is the same as (default-value 'right-fringe-width). */);
5368 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5369 &buffer_defaults
.fringes_outside_margins
,
5370 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5371 This is the same as (default-value 'fringes-outside-margins). */);
5373 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5374 &buffer_defaults
.scroll_bar_width
,
5375 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5376 This is the same as (default-value 'scroll-bar-width). */);
5378 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5379 &buffer_defaults
.vertical_scroll_bar_type
,
5380 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5381 This is the same as (default-value 'vertical-scroll-bar). */);
5383 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5384 &buffer_defaults
.indicate_empty_lines
,
5385 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5386 This is the same as (default-value 'indicate-empty-lines). */);
5388 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5389 &buffer_defaults
.indicate_buffer_boundaries
,
5390 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5391 This is the same as (default-value 'indicate-buffer-boundaries). */);
5393 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5394 &buffer_defaults
.scroll_up_aggressively
,
5395 doc
: /* Default value of `scroll-up-aggressively'.
5396 This value applies in buffers that don't have their own local values.
5397 This variable is an alias for (default-value 'scroll-up-aggressively). */);
5399 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5400 &buffer_defaults
.scroll_down_aggressively
,
5401 doc
: /* Default value of `scroll-down-aggressively'.
5402 This value applies in buffers that don't have their own local values.
5403 This variable is an alias for (default-value 'scroll-down-aggressively). */);
5405 DEFVAR_PER_BUFFER ("header-line-format",
5406 ¤t_buffer
->header_line_format
,
5408 doc
: /* Analogous to `mode-line-format', but controls the header line.
5409 The header line appears, optionally, at the top of a window;
5410 the mode line appears at the bottom. */);
5412 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5414 doc
: /* Template for displaying mode line for current buffer.
5415 Each buffer has its own value of this variable.
5416 Value may be nil, a string, a symbol or a list or cons cell.
5417 A value of nil means don't display a mode line.
5418 For a symbol, its value is used (but it is ignored if t or nil).
5419 A string appearing directly as the value of a symbol is processed verbatim
5420 in that the %-constructs below are not recognized.
5421 Note that unless the symbol is marked as a `risky-local-variable', all
5422 properties in any strings, as well as all :eval and :propertize forms
5423 in the value of that symbol will be ignored.
5424 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5425 is used as a mode line element. Be careful--FORM should not load any files,
5426 because that can cause an infinite recursion.
5427 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5428 with the specified properties PROPS applied.
5429 For a list whose car is a symbol, the symbol's value is taken,
5430 and if that is non-nil, the cadr of the list is processed recursively.
5431 Otherwise, the caddr of the list (if there is one) is processed.
5432 For a list whose car is a string or list, each element is processed
5433 recursively and the results are effectively concatenated.
5434 For a list whose car is an integer, the cdr of the list is processed
5435 and padded (if the number is positive) or truncated (if negative)
5436 to the width specified by that number.
5437 A string is printed verbatim in the mode line except for %-constructs:
5438 (%-constructs are allowed when the string is the entire mode-line-format
5439 or when it is found in a cons-cell or a list)
5440 %b -- print buffer name. %f -- print visited file name.
5441 %F -- print frame name.
5442 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5443 %& is like %*, but ignore read-only-ness.
5444 % means buffer is read-only and * means it is modified.
5445 For a modified read-only buffer, %* gives % and %+ gives *.
5446 %s -- print process status. %l -- print the current line number.
5447 %c -- print the current column number (this makes editing slower).
5448 To make the column number update correctly in all cases,
5449 `column-number-mode' must be non-nil.
5450 %i -- print the size of the buffer.
5451 %I -- like %i, but use k, M, G, etc., to abbreviate.
5452 %p -- print percent of buffer above top of window, or Top, Bot or All.
5453 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5454 or print Bottom or All.
5455 %m -- print the mode name.
5456 %n -- print Narrow if appropriate.
5457 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5458 %Z -- like %z, but including the end-of-line format.
5459 %[ -- print one [ for each recursive editing level. %] similar.
5460 %% -- print %. %- -- print infinitely many dashes.
5461 Decimal digits after the % specify field width to which to pad. */);
5463 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5464 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5465 nil here means use current buffer's major mode, provided it is not
5466 marked as "special".
5468 When a mode is used by default, `find-file' switches to it
5469 before it reads the contents into the buffer and before
5470 it finishes setting up the buffer. Thus, the mode and
5471 its hooks should not expect certain variables such as
5472 `buffer-read-only' and `buffer-file-coding-system' to be set up. */);
5474 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5475 make_number (Lisp_Symbol
),
5476 doc
: /* Symbol for current buffer's major mode. */);
5478 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5480 doc
: /* Pretty name of current buffer's major mode (a string). */);
5482 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5483 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5485 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5487 doc
: /* *Non-nil if searches and matches should ignore case. */);
5489 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5490 make_number (Lisp_Int
),
5491 doc
: /* *Column beyond which automatic line-wrapping should happen.
5492 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5494 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5495 make_number (Lisp_Int
),
5496 doc
: /* *Column for the default indent-line-function to indent to.
5497 Linefeed indents to this column in Fundamental mode. */);
5499 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5500 make_number (Lisp_Int
),
5501 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5503 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5504 doc
: /* *Non-nil means display control chars with uparrow.
5505 A value of nil means use backslash and octal digits.
5506 This variable does not apply to characters whose display is specified
5507 in the current display table (if there is one). */);
5509 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5510 ¤t_buffer
->enable_multibyte_characters
,
5512 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5513 Otherwise they are regarded as unibyte. This affects the display,
5514 file I/O and the behavior of various editing commands.
5516 This variable is buffer-local but you cannot set it directly;
5517 use the function `set-buffer-multibyte' to change a buffer's representation.
5518 Changing its default value with `setq-default' is supported.
5519 See also variable `default-enable-multibyte-characters' and Info node
5520 `(elisp)Text Representations'. */);
5521 XSYMBOL (intern ("enable-multibyte-characters"))->constant
= 1;
5523 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5524 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5525 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5526 This variable applies to saving the buffer, and also to `write-region'
5527 and other functions that use `write-region'.
5528 It does not apply to sending output to subprocesses, however.
5530 If this is nil, the buffer is saved without any code conversion
5531 unless some coding system is specified in `file-coding-system-alist'
5532 for the buffer file.
5534 If the text to be saved cannot be encoded as specified by this variable,
5535 an alternative encoding is selected by `select-safe-coding-system', which see.
5537 The variable `coding-system-for-write', if non-nil, overrides this variable.
5539 This variable is never applied to a way of decoding a file while reading it. */);
5541 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5543 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5545 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5546 doc
: /* *Non-nil means do not display continuation lines.
5547 Instead, give each line of text just one screen line.
5549 Note that this is overridden by the variable
5550 `truncate-partial-width-windows' if that variable is non-nil
5551 and this buffer is not full-frame width. */);
5554 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5556 doc
: /* Non-nil if the visited file is a binary file.
5557 This variable is meaningful on MS-DOG and Windows NT.
5558 On those systems, it is automatically local in every buffer.
5559 On other systems, this variable is normally always nil. */);
5562 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5563 make_number (Lisp_String
),
5564 doc
: /* Name of default directory of current buffer. Should end with slash.
5565 To interactively change the default directory, use command `cd'. */);
5567 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5569 doc
: /* Function called (if non-nil) to perform auto-fill.
5570 It is called after self-inserting any character specified in
5571 the `auto-fill-chars' table.
5572 NOTE: This variable is not a hook;
5573 its value may not be a list of functions. */);
5575 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5576 make_number (Lisp_String
),
5577 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5579 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5580 make_number (Lisp_String
),
5581 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5582 The truename of a file is calculated by `file-truename'
5583 and then abbreviated with `abbreviate-file-name'. */);
5585 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5586 ¤t_buffer
->auto_save_file_name
,
5587 make_number (Lisp_String
),
5588 doc
: /* Name of file for auto-saving current buffer.
5589 If it is nil, that means don't auto-save this buffer. */);
5591 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5592 doc
: /* Non-nil if this buffer is read-only. */);
5594 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5595 doc
: /* Non-nil if this buffer's file has been backed up.
5596 Backing up is done before the first time the file is saved. */);
5598 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5599 make_number (Lisp_Int
),
5600 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5603 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5605 doc
: /* Non-nil enables selective display.
5606 An Integer N as value means display only lines
5607 that start with less than n columns of space.
5608 A value of t means that the character ^M makes itself and
5609 all the rest of the line invisible; also, when saving the buffer
5610 in a file, save the ^M as a newline. */);
5613 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5614 ¤t_buffer
->selective_display_ellipses
,
5616 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5619 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5620 doc
: /* Non-nil if self-insertion should replace existing text.
5621 The value should be one of `overwrite-mode-textual',
5622 `overwrite-mode-binary', or nil.
5623 If it is `overwrite-mode-textual', self-insertion still
5624 inserts at the end of a line, and inserts when point is before a tab,
5625 until the tab is filled in.
5626 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5628 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5630 doc
: /* Display table that controls display of the contents of current buffer.
5632 If this variable is nil, the value of `standard-display-table' is used.
5633 Each window can have its own, overriding display table, see
5634 `set-window-display-table' and `window-display-table'.
5636 The display table is a char-table created with `make-display-table'.
5637 A char-table is an array indexed by character codes. Normal array
5638 primitives `aref' and `aset' can be used to access elements of a char-table.
5640 Each of the char-table elements control how to display the corresponding
5641 text character: the element at index C in the table says how to display
5642 the character whose code is C. Each element should be a vector of
5643 characters or nil. nil means display the character in the default fashion;
5644 otherwise, the characters from the vector are delivered to the screen
5645 instead of the original character.
5647 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5648 a capital Y instead of each X character.
5650 In addition, a char-table has six extra slots to control the display of:
5652 the end of a truncated screen line (extra-slot 0, a single character);
5653 the end of a continued line (extra-slot 1, a single character);
5654 the escape character used to display character codes in octal
5655 (extra-slot 2, a single character);
5656 the character used as an arrow for control characters (extra-slot 3,
5657 a single character);
5658 the decoration indicating the presence of invisible lines (extra-slot 4,
5659 a vector of characters);
5660 the character used to draw the border between side-by-side windows
5661 (extra-slot 5, a single character).
5663 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5665 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5667 doc
: /* *Width of left marginal area for display of a buffer.
5668 A value of nil means no marginal area. */);
5670 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5672 doc
: /* *Width of right marginal area for display of a buffer.
5673 A value of nil means no marginal area. */);
5675 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5677 doc
: /* *Width of this buffer's left fringe (in pixels).
5678 A value of 0 means no left fringe is shown in this buffer's window.
5679 A value of nil means to use the left fringe width from the window's frame. */);
5681 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5683 doc
: /* *Width of this buffer's right fringe (in pixels).
5684 A value of 0 means no right fringe is shown in this buffer's window.
5685 A value of nil means to use the right fringe width from the window's frame. */);
5687 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5689 doc
: /* *Non-nil means to display fringes outside display margins.
5690 A value of nil means to display fringes between margins and buffer text. */);
5692 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5694 doc
: /* *Width of this buffer's scroll bars in pixels.
5695 A value of nil means to use the scroll bar width from the window's frame. */);
5697 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5699 doc
: /* *Position of this buffer's vertical scroll bar.
5700 The value takes effect whenever you tell a window to display this buffer;
5701 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5703 A value of `left' or `right' means put the vertical scroll bar at that side
5704 of the window; a value of nil means don't show any vertical scroll bars.
5705 A value of t (the default) means do whatever the window's frame specifies. */);
5707 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5708 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5709 doc
: /* *Visually indicate empty lines after the buffer end.
5710 If non-nil, a bitmap is displayed in the left fringe of a window on
5711 window-systems. */);
5713 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5714 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
5715 doc
: /* *Visually indicate buffer boundaries and scrolling.
5716 If non-nil, the first and last line of the buffer are marked in the fringe
5717 of a window on window-systems with angle bitmaps, or if the window can be
5718 scrolled, the top and bottom line of the window are marked with up and down
5721 If value is a symbol `left' or `right', both angle and arrow bitmaps
5722 are displayed in the left or right fringe, resp. Any other value
5723 that doesn't look like an alist means display the angle bitmaps in
5724 the left fringe but no arrows.
5726 You can exercise more precise control by using an alist as the
5727 value. Each alist element (INDICATOR . POSITION) specifies
5728 where to show one of the indicators. INDICATOR is one of `top',
5729 `bottom', `up', `down', or t, which specifies the default position,
5730 and POSITION is one of `left', `right', or nil, meaning do not show
5733 For example, ((top . left) (t . right)) places the top angle bitmap in
5734 left fringe, the bottom angle bitmap in right fringe, and both arrow
5735 bitmaps in right fringe. To show just the angle bitmaps in the left
5736 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5738 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5739 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5740 doc
: /* How far to scroll windows upward.
5741 If you move point off the bottom, the window scrolls automatically.
5742 This variable controls how far it scrolls. nil, the default,
5743 means scroll to center point. A fraction means scroll to put point
5744 that fraction of the window's height from the bottom of the window.
5745 When the value is 0.0, point goes at the bottom line, which in the simple
5746 case that you moved off with C-f means scrolling just one line. 1.0 means
5747 point goes at the top, so that in that simple case, the window
5748 scrolls by a full window height. Meaningful values are
5749 between 0.0 and 1.0, inclusive. */);
5751 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5752 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5753 doc
: /* How far to scroll windows downward.
5754 If you move point off the top, the window scrolls automatically.
5755 This variable controls how far it scrolls. nil, the default,
5756 means scroll to center point. A fraction means scroll to put point
5757 that fraction of the window's height from the top of the window.
5758 When the value is 0.0, point goes at the top line, which in the simple
5759 case that you moved off with C-b means scrolling just one line. 1.0 means
5760 point goes at the bottom, so that in that simple case, the window
5761 scrolls by a full window height. Meaningful values are
5762 between 0.0 and 1.0, inclusive. */);
5764 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5768 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5769 doc
: /* List of functions to call before each text change.
5770 Two arguments are passed to each function: the positions of
5771 the beginning and end of the range of old text to be changed.
5772 \(For an insertion, the beginning and end are at the same place.)
5773 No information is given about the length of the text after the change.
5775 Buffer changes made while executing the `before-change-functions'
5776 don't call any before-change or after-change functions.
5777 That's because these variables are temporarily set to nil.
5778 As a result, a hook function cannot straightforwardly alter the value of
5779 these variables. See the Emacs Lisp manual for a way of
5780 accomplishing an equivalent result by using other variables.
5782 If an unhandled error happens in running these functions,
5783 the variable's value remains nil. That prevents the error
5784 from happening repeatedly and making Emacs nonfunctional. */);
5785 Vbefore_change_functions
= Qnil
;
5787 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5788 doc
: /* List of functions to call after each text change.
5789 Three arguments are passed to each function: the positions of
5790 the beginning and end of the range of changed text,
5791 and the length in bytes of the pre-change text replaced by that range.
5792 \(For an insertion, the pre-change length is zero;
5793 for a deletion, that length is the number of bytes deleted,
5794 and the post-change beginning and end are at the same place.)
5796 Buffer changes made while executing the `after-change-functions'
5797 don't call any before-change or after-change functions.
5798 That's because these variables are temporarily set to nil.
5799 As a result, a hook function cannot straightforwardly alter the value of
5800 these variables. See the Emacs Lisp manual for a way of
5801 accomplishing an equivalent result by using other variables.
5803 If an unhandled error happens in running these functions,
5804 the variable's value remains nil. That prevents the error
5805 from happening repeatedly and making Emacs nonfunctional. */);
5806 Vafter_change_functions
= Qnil
;
5808 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5809 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5810 The functions are run using the `run-hooks' function. */);
5811 Vfirst_change_hook
= Qnil
;
5813 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5814 doc
: /* List of undo entries in current buffer.
5815 Recent changes come first; older changes follow newer.
5817 An entry (BEG . END) represents an insertion which begins at
5818 position BEG and ends at position END.
5820 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5821 from (abs POSITION). If POSITION is positive, point was at the front
5822 of the text being deleted; if negative, point was at the end.
5824 An entry (t HIGH . LOW) indicates that the buffer previously had
5825 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5826 of the visited file's modification time, as of that time. If the
5827 modification time of the most recent save is different, this entry is
5830 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5831 was modified between BEG and END. PROPERTY is the property name,
5832 and VALUE is the old value.
5834 An entry (apply FUN-NAME . ARGS) means undo the change with
5835 \(apply FUN-NAME ARGS).
5837 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5838 in the active region. BEG and END is the range affected by this entry
5839 and DELTA is the number of bytes added or deleted in that range by
5842 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5843 was adjusted in position by the offset DISTANCE (an integer).
5845 An entry of the form POSITION indicates that point was at the buffer
5846 location given by the integer. Undoing an entry of this form places
5849 nil marks undo boundaries. The undo command treats the changes
5850 between two undo boundaries as a single step to be undone.
5852 If the value of the variable is t, undo information is not recorded. */);
5854 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5855 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5857 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5858 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5860 Normally, the line-motion functions work by scanning the buffer for
5861 newlines. Columnar operations (like `move-to-column' and
5862 `compute-motion') also work by scanning the buffer, summing character
5863 widths as they go. This works well for ordinary text, but if the
5864 buffer's lines are very long (say, more than 500 characters), these
5865 motion functions will take longer to execute. Emacs may also take
5866 longer to update the display.
5868 If `cache-long-line-scans' is non-nil, these motion functions cache the
5869 results of their scans, and consult the cache to avoid rescanning
5870 regions of the buffer until the text is modified. The caches are most
5871 beneficial when they prevent the most searching---that is, when the
5872 buffer contains long lines and large regions of characters with the
5873 same, fixed screen width.
5875 When `cache-long-line-scans' is non-nil, processing short lines will
5876 become slightly slower (because of the overhead of consulting the
5877 cache), and the caches will use memory roughly proportional to the
5878 number of newlines and characters whose screen width varies.
5880 The caches require no explicit maintenance; their accuracy is
5881 maintained internally by the Emacs primitives. Enabling or disabling
5882 the cache should not affect the behavior of any of the motion
5883 functions; it should only affect their performance. */);
5885 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5886 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5888 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5889 doc
: /* List of formats to use when saving this buffer.
5890 Formats are defined by `format-alist'. This variable is
5891 set when a file is visited. */);
5893 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5894 ¤t_buffer
->auto_save_file_format
, Qnil
,
5895 doc
: /* *Format in which to write auto-save files.
5896 Should be a list of symbols naming formats that are defined in `format-alist'.
5897 If it is t, which is the default, auto-save files are written in the
5898 same format as a regular save would use. */);
5900 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5901 ¤t_buffer
->invisibility_spec
, Qnil
,
5902 doc
: /* Invisibility spec of this buffer.
5903 The default is t, which means that text is invisible
5904 if it has a non-nil `invisible' property.
5905 If the value is a list, a text character is invisible if its `invisible'
5906 property is an element in that list.
5907 If an element is a cons cell of the form (PROP . ELLIPSIS),
5908 then characters with property value PROP are invisible,
5909 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5911 DEFVAR_PER_BUFFER ("buffer-display-count",
5912 ¤t_buffer
->display_count
, Qnil
,
5913 doc
: /* A number incremented each time this buffer is displayed in a window.
5914 The function `set-window-buffer' increments it. */);
5916 DEFVAR_PER_BUFFER ("buffer-display-time",
5917 ¤t_buffer
->display_time
, Qnil
,
5918 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5919 The function `set-window-buffer' updates this variable
5920 to the value obtained by calling `current-time'.
5921 If the buffer has never been shown in a window, the value is nil. */);
5923 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5924 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5925 Non-nil also enables highlighting of the region whenever the mark is active.
5926 The variable `highlight-nonselected-windows' controls whether to highlight
5927 all windows or just the selected window.
5929 If the value is `lambda', that enables Transient Mark mode temporarily
5930 until the next buffer modification. If a command sets the value to `only',
5931 that enables Transient Mark mode for the following command only.
5932 During that following command, the value of `transient-mark-mode'
5933 is `identity'. If it is still `identity' at the end of that command,
5934 it changes to nil. */);
5935 Vtransient_mark_mode
= Qnil
;
5937 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5938 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5939 If the value is t, disregard `buffer-read-only' and all `read-only'
5940 text properties. If the value is a list, disregard `buffer-read-only'
5941 and disregard a `read-only' text property if the property value
5942 is a member of the list. */);
5943 Vinhibit_read_only
= Qnil
;
5945 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5946 doc
: /* Cursor to use when this buffer is in the selected window.
5947 Values are interpreted as follows:
5949 t use the cursor specified for the frame
5950 nil don't display a cursor
5951 box display a filled box cursor
5952 hollow display a hollow box cursor
5953 bar display a vertical bar cursor with default width
5954 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5955 hbar display a horizontal bar cursor with default height
5956 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
5957 ANYTHING ELSE display a hollow box cursor
5959 When the buffer is displayed in a nonselected window,
5960 this variable has no effect; the cursor appears as a hollow box. */);
5962 DEFVAR_PER_BUFFER ("line-spacing",
5963 ¤t_buffer
->extra_line_spacing
, Qnil
,
5964 doc
: /* Additional space to put between lines when displaying a buffer.
5965 The space is measured in pixels, and put below lines on window systems.
5966 If value is a floating point number, it specifies the spacing relative
5967 to the default frame line height. */);
5969 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
5970 ¤t_buffer
->cursor_in_non_selected_windows
, Qnil
,
5971 doc
: /* *Cursor type to display in non-selected windows.
5972 t means to use hollow box cursor. See `cursor-type' for other values. */);
5974 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5975 doc
: /* List of functions called with no args to query before killing a buffer. */);
5976 Vkill_buffer_query_functions
= Qnil
;
5978 defsubr (&Sbuffer_live_p
);
5979 defsubr (&Sbuffer_list
);
5980 defsubr (&Sget_buffer
);
5981 defsubr (&Sget_file_buffer
);
5982 defsubr (&Sget_buffer_create
);
5983 defsubr (&Smake_indirect_buffer
);
5984 defsubr (&Sgenerate_new_buffer_name
);
5985 defsubr (&Sbuffer_name
);
5986 /*defsubr (&Sbuffer_number);*/
5987 defsubr (&Sbuffer_file_name
);
5988 defsubr (&Sbuffer_base_buffer
);
5989 defsubr (&Sbuffer_local_value
);
5990 defsubr (&Sbuffer_local_variables
);
5991 defsubr (&Sbuffer_modified_p
);
5992 defsubr (&Sset_buffer_modified_p
);
5993 defsubr (&Sbuffer_modified_tick
);
5994 defsubr (&Srename_buffer
);
5995 defsubr (&Sother_buffer
);
5996 defsubr (&Sbuffer_enable_undo
);
5997 defsubr (&Skill_buffer
);
5998 defsubr (&Sset_buffer_major_mode
);
5999 defsubr (&Sswitch_to_buffer
);
6000 defsubr (&Spop_to_buffer
);
6001 defsubr (&Scurrent_buffer
);
6002 defsubr (&Sset_buffer
);
6003 defsubr (&Sbarf_if_buffer_read_only
);
6004 defsubr (&Sbury_buffer
);
6005 defsubr (&Serase_buffer
);
6006 defsubr (&Sset_buffer_multibyte
);
6007 defsubr (&Skill_all_local_variables
);
6009 defsubr (&Soverlayp
);
6010 defsubr (&Smake_overlay
);
6011 defsubr (&Sdelete_overlay
);
6012 defsubr (&Smove_overlay
);
6013 defsubr (&Soverlay_start
);
6014 defsubr (&Soverlay_end
);
6015 defsubr (&Soverlay_buffer
);
6016 defsubr (&Soverlay_properties
);
6017 defsubr (&Soverlays_at
);
6018 defsubr (&Soverlays_in
);
6019 defsubr (&Snext_overlay_change
);
6020 defsubr (&Sprevious_overlay_change
);
6021 defsubr (&Soverlay_recenter
);
6022 defsubr (&Soverlay_lists
);
6023 defsubr (&Soverlay_get
);
6024 defsubr (&Soverlay_put
);
6025 defsubr (&Srestore_buffer_modified_p
);
6031 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6032 initial_define_key (control_x_map
, 'k', "kill-buffer");
6034 /* This must not be in syms_of_buffer, because Qdisabled is not
6035 initialized when that function gets called. */
6036 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
6039 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
6040 (do not change this comment) */