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., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include <sys/types.h>
26 #include <sys/param.h>
35 /* in 4.1 [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;
634 clone_per_buffer_values (b
->base_buffer
, b
);
640 delete_all_overlays (b
)
645 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
646 have to empty the list, otherwise we end up with overlays that
647 think they belong to this buffer while the buffer doesn't know about
649 while (b
->overlays_before
)
651 XSETMISC (overlay
, b
->overlays_before
);
652 Fdelete_overlay (overlay
);
654 while (b
->overlays_after
)
656 XSETMISC (overlay
, b
->overlays_after
);
657 Fdelete_overlay (overlay
);
659 eassert (b
->overlays_before
== NULL
);
660 eassert (b
->overlays_after
== NULL
);
663 /* Reinitialize everything about a buffer except its name and contents
665 If called on an already-initialized buffer, the list of overlays
666 should be deleted before calling this function, otherwise we end up
667 with overlays that claim to belong to the buffer but the buffer
668 claims it doesn't belong to it. */
672 register struct buffer
*b
;
675 b
->file_truename
= Qnil
;
676 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
678 XSETFASTINT (b
->save_length
, 0);
679 b
->last_window_start
= 1;
680 /* It is more conservative to start out "changed" than "unchanged". */
682 b
->prevent_redisplay_optimizations_p
= 1;
684 b
->auto_save_modified
= 0;
685 b
->auto_save_failure_time
= -1;
686 b
->auto_save_file_name
= Qnil
;
688 b
->overlays_before
= NULL
;
689 b
->overlays_after
= NULL
;
690 b
->overlay_center
= BEG
;
691 b
->mark_active
= Qnil
;
692 b
->point_before_scroll
= Qnil
;
693 b
->file_format
= Qnil
;
694 b
->auto_save_file_format
= Qt
;
695 b
->last_selected_window
= Qnil
;
696 XSETINT (b
->display_count
, 0);
697 b
->display_time
= Qnil
;
698 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
699 b
->cursor_type
= buffer_defaults
.cursor_type
;
700 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
702 b
->display_error_modiff
= 0;
705 /* Reset buffer B's local variables info.
706 Don't use this on a buffer that has already been in use;
707 it does not treat permanent locals consistently.
708 Instead, use Fkill_all_local_variables.
710 If PERMANENT_TOO is 1, then we reset permanent built-in
711 buffer-local variables. If PERMANENT_TOO is 0,
712 we preserve those. */
715 reset_buffer_local_variables (b
, permanent_too
)
716 register struct buffer
*b
;
722 /* Reset the major mode to Fundamental, together with all the
723 things that depend on the major mode.
724 default-major-mode is handled at a higher level.
725 We ignore it here. */
726 b
->major_mode
= Qfundamental_mode
;
728 b
->mode_name
= QSFundamental
;
729 b
->minor_modes
= Qnil
;
731 /* If the standard case table has been altered and invalidated,
732 fix up its insides first. */
733 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
734 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
735 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
736 Fset_standard_case_table (Vascii_downcase_table
);
738 b
->downcase_table
= Vascii_downcase_table
;
739 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
740 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
741 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
742 b
->invisibility_spec
= Qt
;
744 b
->buffer_file_type
= Qnil
;
747 /* Reset all (or most) per-buffer variables to their defaults. */
748 b
->local_var_alist
= Qnil
;
749 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
750 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
751 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
753 /* For each slot that has a default value,
754 copy that into the slot. */
756 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
758 offset
+= sizeof (Lisp_Object
))
760 int idx
= PER_BUFFER_IDX (offset
);
763 || buffer_permanent_local_flags
[idx
] == 0))
764 /* Is -2 used anywhere? */
766 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
770 /* We split this away from generate-new-buffer, because rename-buffer
771 and set-visited-file-name ought to be able to use this to really
772 rename the buffer properly. */
774 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
776 doc
: /* Return a string that is the name of no existing buffer based on NAME.
777 If there is no live buffer named NAME, then return NAME.
778 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
779 \(starting at 2) until an unused name is found, and then return that name.
780 Optional second argument IGNORE specifies a name that is okay to use
781 \(if it is in the sequence to be tried)
782 even if a buffer with that name exists. */)
784 register Lisp_Object name
, ignore
;
786 register Lisp_Object gentemp
, tem
;
792 tem
= Fstring_equal (name
, ignore
);
795 tem
= Fget_buffer (name
);
802 sprintf (number
, "<%d>", ++count
);
803 gentemp
= concat2 (name
, build_string (number
));
804 tem
= Fstring_equal (gentemp
, ignore
);
807 tem
= Fget_buffer (gentemp
);
814 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
815 doc
: /* Return the name of BUFFER, as a string.
816 With no argument or nil as argument, return the name of the current buffer. */)
818 register Lisp_Object buffer
;
821 return current_buffer
->name
;
822 CHECK_BUFFER (buffer
);
823 return XBUFFER (buffer
)->name
;
826 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
827 doc
: /* Return name of file BUFFER is visiting, or nil if none.
828 No argument or nil as argument means use the current buffer. */)
830 register Lisp_Object buffer
;
833 return current_buffer
->filename
;
834 CHECK_BUFFER (buffer
);
835 return XBUFFER (buffer
)->filename
;
838 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
840 doc
: /* Return the base buffer of indirect buffer BUFFER.
841 If BUFFER is not indirect, return nil.
842 BUFFER defaults to the current buffer. */)
844 register Lisp_Object buffer
;
847 Lisp_Object base_buffer
;
850 base
= current_buffer
->base_buffer
;
853 CHECK_BUFFER (buffer
);
854 base
= XBUFFER (buffer
)->base_buffer
;
859 XSETBUFFER (base_buffer
, base
);
863 DEFUN ("buffer-local-value", Fbuffer_local_value
,
864 Sbuffer_local_value
, 2, 2, 0,
865 doc
: /* Return the value of VARIABLE in BUFFER.
866 If VARIABLE does not have a buffer-local binding in BUFFER, the value
867 is the default binding of variable. */)
869 register Lisp_Object symbol
;
870 register Lisp_Object buffer
;
872 register struct buffer
*buf
;
873 register Lisp_Object result
;
875 CHECK_SYMBOL (symbol
);
876 CHECK_BUFFER (buffer
);
877 buf
= XBUFFER (buffer
);
879 /* Look in local_var_list */
880 result
= Fassoc (symbol
, buf
->local_var_alist
);
886 /* Look in special slots */
887 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
888 offset
< sizeof (struct buffer
);
889 /* sizeof EMACS_INT == sizeof Lisp_Object */
890 offset
+= (sizeof (EMACS_INT
)))
892 idx
= PER_BUFFER_IDX (offset
);
893 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
894 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
895 && EQ (PER_BUFFER_SYMBOL (offset
), symbol
))
897 result
= PER_BUFFER_VALUE (buf
, offset
);
904 result
= Fdefault_value (symbol
);
908 Lisp_Object valcontents
;
909 Lisp_Object current_alist_element
;
911 /* What binding is loaded right now? */
912 valcontents
= SYMBOL_VALUE (symbol
);
913 current_alist_element
914 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
916 /* The value of the currently loaded binding is not
917 stored in it, but rather in the realvalue slot.
918 Store that value into the binding it belongs to
919 in case that is the one we are about to use. */
921 Fsetcdr (current_alist_element
,
922 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
924 /* Now get the (perhaps updated) value out of the binding. */
925 result
= XCDR (result
);
928 if (EQ (result
, Qunbound
))
929 return Fsignal (Qvoid_variable
, Fcons (symbol
, Qnil
));
934 /* Return an alist of the Lisp-level buffer-local bindings of
935 buffer BUF. That is, do't include the variables maintained
936 in special slots in the buffer object. */
939 buffer_lisp_local_variables (buf
)
942 Lisp_Object result
= Qnil
;
943 register Lisp_Object tail
;
944 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
946 Lisp_Object val
, elt
;
950 /* Reference each variable in the alist in buf.
951 If inquiring about the current buffer, this gets the current values,
952 so store them into the alist so the alist is up to date.
953 If inquiring about some other buffer, this swaps out any values
954 for that buffer, making the alist up to date automatically. */
955 val
= find_symbol_value (XCAR (elt
));
956 /* Use the current buffer value only if buf is the current buffer. */
957 if (buf
!= current_buffer
)
960 /* If symbol is unbound, put just the symbol in the list. */
961 if (EQ (val
, Qunbound
))
962 result
= Fcons (XCAR (elt
), result
);
963 /* Otherwise, put (symbol . value) in the list. */
965 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
971 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
972 Sbuffer_local_variables
, 0, 1, 0,
973 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
974 Most elements look like (SYMBOL . VALUE), describing one variable.
975 For a symbol that is locally unbound, just the symbol appears in the value.
976 Note that storing new VALUEs in these elements doesn't change the variables.
977 No argument or nil as argument means use current buffer as BUFFER. */)
979 register Lisp_Object buffer
;
981 register struct buffer
*buf
;
982 register Lisp_Object result
;
985 buf
= current_buffer
;
988 CHECK_BUFFER (buffer
);
989 buf
= XBUFFER (buffer
);
992 result
= buffer_lisp_local_variables (buf
);
994 /* Add on all the variables stored in special slots. */
998 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
999 offset
< sizeof (struct buffer
);
1000 /* sizeof EMACS_INT == sizeof Lisp_Object */
1001 offset
+= (sizeof (EMACS_INT
)))
1003 idx
= PER_BUFFER_IDX (offset
);
1004 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1005 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1006 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1007 PER_BUFFER_VALUE (buf
, offset
)),
1015 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1017 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1018 No argument or nil as argument means use current buffer as BUFFER. */)
1020 register Lisp_Object buffer
;
1022 register struct buffer
*buf
;
1024 buf
= current_buffer
;
1027 CHECK_BUFFER (buffer
);
1028 buf
= XBUFFER (buffer
);
1031 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1034 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1036 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1037 A non-nil FLAG means mark the buffer modified. */)
1039 register Lisp_Object flag
;
1041 register int already
;
1042 register Lisp_Object fn
;
1043 Lisp_Object buffer
, window
;
1045 #ifdef CLASH_DETECTION
1046 /* If buffer becoming modified, lock the file.
1047 If buffer becoming unmodified, unlock the file. */
1049 fn
= current_buffer
->file_truename
;
1050 /* Test buffer-file-name so that binding it to nil is effective. */
1051 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1053 already
= SAVE_MODIFF
< MODIFF
;
1054 if (!already
&& !NILP (flag
))
1056 else if (already
&& NILP (flag
))
1059 #endif /* CLASH_DETECTION */
1061 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1063 /* Set update_mode_lines only if buffer is displayed in some window.
1064 Packages like jit-lock or lazy-lock preserve a buffer's modified
1065 state by recording/restoring the state around blocks of code.
1066 Setting update_mode_lines makes redisplay consider all windows
1067 (on all frames). Stealth fontification of buffers not displayed
1068 would incur additional redisplay costs if we'd set
1069 update_modes_lines unconditionally.
1071 Ideally, I think there should be another mechanism for fontifying
1072 buffers without "modifying" buffers, or redisplay should be
1073 smarter about updating the `*' in mode lines. --gerd */
1074 XSETBUFFER (buffer
, current_buffer
);
1075 window
= Fget_buffer_window (buffer
, Qt
);
1076 if (WINDOWP (window
))
1078 ++update_mode_lines
;
1079 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1085 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1086 Srestore_buffer_modified_p
, 1, 1, 0,
1087 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1088 It is not ensured that mode lines will be updated to show the modified
1089 state of the current buffer. Use with care. */)
1093 #ifdef CLASH_DETECTION
1096 /* If buffer becoming modified, lock the file.
1097 If buffer becoming unmodified, unlock the file. */
1099 fn
= current_buffer
->file_truename
;
1100 /* Test buffer-file-name so that binding it to nil is effective. */
1101 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1103 int already
= SAVE_MODIFF
< MODIFF
;
1104 if (!already
&& !NILP (flag
))
1106 else if (already
&& NILP (flag
))
1109 #endif /* CLASH_DETECTION */
1111 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1115 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1117 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1118 Each buffer has a tick counter which is incremented each time the text in
1119 that buffer is changed. It wraps around occasionally.
1120 No argument or nil as argument means use current buffer as BUFFER. */)
1122 register Lisp_Object buffer
;
1124 register struct buffer
*buf
;
1126 buf
= current_buffer
;
1129 CHECK_BUFFER (buffer
);
1130 buf
= XBUFFER (buffer
);
1133 return make_number (BUF_MODIFF (buf
));
1136 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1137 "sRename buffer (to new name): \nP",
1138 doc
: /* Change current buffer's name to NEWNAME (a string).
1139 If second arg UNIQUE is nil or omitted, it is an error if a
1140 buffer named NEWNAME already exists.
1141 If UNIQUE is non-nil, come up with a new name using
1142 `generate-new-buffer-name'.
1143 Interactively, you can set UNIQUE with a prefix argument.
1144 We return the name we actually gave the buffer.
1145 This does not change the name of the visited file (if any). */)
1147 register Lisp_Object newname
, unique
;
1149 register Lisp_Object tem
, buf
;
1151 CHECK_STRING (newname
);
1153 if (SCHARS (newname
) == 0)
1154 error ("Empty string is invalid as a buffer name");
1156 tem
= Fget_buffer (newname
);
1159 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1160 rename the buffer automatically so you can create another
1161 with the original name. It makes UNIQUE equivalent to
1162 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1163 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1164 return current_buffer
->name
;
1166 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1168 error ("Buffer name `%s' is in use", SDATA (newname
));
1171 current_buffer
->name
= newname
;
1173 /* Catch redisplay's attention. Unless we do this, the mode lines for
1174 any windows displaying current_buffer will stay unchanged. */
1175 update_mode_lines
++;
1177 XSETBUFFER (buf
, current_buffer
);
1178 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1179 if (NILP (current_buffer
->filename
)
1180 && !NILP (current_buffer
->auto_save_file_name
))
1181 call0 (intern ("rename-auto-save-file"));
1182 /* Refetch since that last call may have done GC. */
1183 return current_buffer
->name
;
1186 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1187 doc
: /* Return most recently selected buffer other than BUFFER.
1188 Buffers not visible in windows are preferred to visible buffers,
1189 unless optional second argument VISIBLE-OK is non-nil.
1190 If the optional third argument FRAME is non-nil, use that frame's
1191 buffer list instead of the selected frame's buffer list.
1192 If no other buffer exists, the buffer `*scratch*' is returned.
1193 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1194 (buffer
, visible_ok
, frame
)
1195 register Lisp_Object buffer
, visible_ok
, frame
;
1197 Lisp_Object
Fset_buffer_major_mode ();
1198 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1202 frame
= selected_frame
;
1204 tail
= Vbuffer_alist
;
1205 pred
= frame_buffer_predicate (frame
);
1207 /* Consider buffers that have been seen in the selected frame
1208 before other buffers. */
1210 tem
= frame_buffer_list (frame
);
1214 if (BUFFERP (XCAR (tem
)))
1215 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1218 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1220 for (; CONSP (tail
); tail
= XCDR (tail
))
1222 buf
= Fcdr (XCAR (tail
));
1223 if (EQ (buf
, buffer
))
1227 if (NILP (XBUFFER (buf
)->name
))
1229 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1231 /* If the selected frame has a buffer_predicate,
1232 disregard buffers that don't fit the predicate. */
1235 tem
= call1 (pred
, buf
);
1240 if (NILP (visible_ok
))
1241 tem
= Fget_buffer_window (buf
, Qvisible
);
1246 if (NILP (notsogood
))
1249 if (!NILP (notsogood
))
1251 buf
= Fget_buffer (build_string ("*scratch*"));
1254 buf
= Fget_buffer_create (build_string ("*scratch*"));
1255 Fset_buffer_major_mode (buf
);
1260 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1262 doc
: /* Start keeping undo information for buffer BUFFER.
1263 No argument or nil as argument means do this for the current buffer. */)
1265 register Lisp_Object buffer
;
1267 Lisp_Object real_buffer
;
1270 XSETBUFFER (real_buffer
, current_buffer
);
1273 real_buffer
= Fget_buffer (buffer
);
1274 if (NILP (real_buffer
))
1278 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1279 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1285 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1286 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1287 The buffer being killed will be current while the hook is running.\n\
1290 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1291 doc
: /* Kill the buffer BUFFER.
1292 The argument may be a buffer or may be the name of a buffer.
1293 An argument of nil means kill the current buffer.
1295 Value is t if the buffer is actually killed, nil if user says no.
1297 The value of `kill-buffer-hook' (which may be local to that buffer),
1298 if not void, is a list of functions to be called, with no arguments,
1299 before the buffer is actually killed. The buffer to be killed is current
1300 when the hook functions are called.
1302 Any processes that have this buffer as the `process-buffer' are killed
1308 register struct buffer
*b
;
1309 register Lisp_Object tem
;
1310 register struct Lisp_Marker
*m
;
1311 struct gcpro gcpro1
;
1314 buf
= Fcurrent_buffer ();
1316 buf
= Fget_buffer (buffer
);
1322 /* Avoid trouble for buffer already dead. */
1326 /* Query if the buffer is still modified. */
1327 if (INTERACTIVE
&& !NILP (b
->filename
)
1328 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1331 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1332 b
->name
, make_number (0)));
1338 /* Run hooks with the buffer to be killed the current buffer. */
1340 int count
= SPECPDL_INDEX ();
1341 Lisp_Object arglist
[1];
1343 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1344 set_buffer_internal (b
);
1346 /* First run the query functions; if any query is answered no,
1347 don't kill the buffer. */
1348 arglist
[0] = Qkill_buffer_query_functions
;
1349 if (NILP (Frun_hook_with_args_until_failure (1, arglist
)))
1350 return unbind_to (count
, Qnil
);
1352 /* Then run the hooks. */
1353 Frun_hooks (1, &Qkill_buffer_hook
);
1354 unbind_to (count
, Qnil
);
1357 /* We have no more questions to ask. Verify that it is valid
1358 to kill the buffer. This must be done after the questions
1359 since anything can happen within do_yes_or_no_p. */
1361 /* Don't kill the minibuffer now current. */
1362 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1368 /* When we kill a base buffer, kill all its indirect buffers.
1369 We do it at this stage so nothing terrible happens if they
1370 ask questions or their hooks get errors. */
1371 if (! b
->base_buffer
)
1373 struct buffer
*other
;
1377 for (other
= all_buffers
; other
; other
= other
->next
)
1378 /* all_buffers contains dead buffers too;
1379 don't re-kill them. */
1380 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1383 XSETBUFFER (buf
, other
);
1390 /* Make this buffer not be current.
1391 In the process, notice if this is the sole visible buffer
1392 and give up if so. */
1393 if (b
== current_buffer
)
1395 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1397 if (b
== current_buffer
)
1401 /* Notice if the buffer to kill is the sole visible buffer
1402 when we're currently in the mini-buffer, and give up if so. */
1403 XSETBUFFER (tem
, current_buffer
);
1404 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1406 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1411 /* Now there is no question: we can kill the buffer. */
1413 #ifdef CLASH_DETECTION
1414 /* Unlock this buffer's file, if it is locked. */
1416 #endif /* CLASH_DETECTION */
1418 kill_buffer_processes (buf
);
1419 clear_charpos_cache (b
);
1421 tem
= Vinhibit_quit
;
1423 replace_buffer_in_all_windows (buf
);
1424 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1425 frames_discard_buffer (buf
);
1426 Vinhibit_quit
= tem
;
1428 /* Delete any auto-save file, if we saved it in this session.
1429 But not if the buffer is modified. */
1430 if (STRINGP (b
->auto_save_file_name
)
1431 && b
->auto_save_modified
!= 0
1432 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1433 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1434 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1437 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1439 internal_delete_file (b
->auto_save_file_name
);
1444 /* Unchain all markers that belong to this indirect buffer.
1445 Don't unchain the markers that belong to the base buffer
1446 or its other indirect buffers. */
1447 for (m
= BUF_MARKERS (b
); m
; )
1449 struct Lisp_Marker
*next
= m
->next
;
1457 /* Unchain all markers of this buffer and its indirect buffers.
1458 and leave them pointing nowhere. */
1459 for (m
= BUF_MARKERS (b
); m
; )
1461 struct Lisp_Marker
*next
= m
->next
;
1466 BUF_MARKERS (b
) = NULL
;
1467 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1469 /* Perhaps we should explicitly free the interval tree here... */
1472 /* Reset the local variables, so that this buffer's local values
1473 won't be protected from GC. They would be protected
1474 if they happened to remain encached in their symbols.
1475 This gets rid of them for certain. */
1476 swap_out_buffer_local_variables (b
);
1477 reset_buffer_local_variables (b
, 1);
1482 if (! b
->base_buffer
)
1483 free_buffer_text (b
);
1485 if (b
->newline_cache
)
1487 free_region_cache (b
->newline_cache
);
1488 b
->newline_cache
= 0;
1490 if (b
->width_run_cache
)
1492 free_region_cache (b
->width_run_cache
);
1493 b
->width_run_cache
= 0;
1495 b
->width_table
= Qnil
;
1497 b
->undo_list
= Qnil
;
1502 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1503 we do this each time BUF is selected visibly, the more recently
1504 selected buffers are always closer to the front of the list. This
1505 means that other_buffer is more likely to choose a relevant buffer. */
1511 register Lisp_Object link
, prev
;
1513 frame
= selected_frame
;
1516 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1518 if (EQ (XCDR (XCAR (link
)), buf
))
1523 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1524 we cannot use Fdelq itself here because it allows quitting. */
1527 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1529 XSETCDR (prev
, XCDR (XCDR (prev
)));
1531 XSETCDR (link
, Vbuffer_alist
);
1532 Vbuffer_alist
= link
;
1534 /* Now move this buffer to the front of frame_buffer_list also. */
1537 for (link
= frame_buffer_list (frame
); CONSP (link
);
1540 if (EQ (XCAR (link
), buf
))
1545 /* Effectively do delq. */
1550 set_frame_buffer_list (frame
,
1551 XCDR (frame_buffer_list (frame
)));
1553 XSETCDR (prev
, XCDR (XCDR (prev
)));
1555 XSETCDR (link
, frame_buffer_list (frame
));
1556 set_frame_buffer_list (frame
, link
);
1559 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1562 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1563 doc
: /* Set an appropriate major mode for BUFFER.
1564 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1565 according to `default-major-mode'.
1566 Use this function before selecting the buffer, since it may need to inspect
1567 the current buffer's major mode. */)
1572 Lisp_Object function
;
1574 if (STRINGP (XBUFFER (buffer
)->name
)
1575 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1576 function
= find_symbol_value (intern ("initial-major-mode"));
1579 function
= buffer_defaults
.major_mode
;
1581 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1582 function
= current_buffer
->major_mode
;
1585 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1588 count
= SPECPDL_INDEX ();
1590 /* To select a nonfundamental mode,
1591 select the buffer temporarily and then call the mode function. */
1593 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1595 Fset_buffer (buffer
);
1598 return unbind_to (count
, Qnil
);
1601 /* If switching buffers in WINDOW would be an error, return
1602 a C string saying what the error would be. */
1605 no_switch_window (window
)
1609 if (EQ (minibuf_window
, window
))
1610 return "Cannot switch buffers in minibuffer window";
1611 tem
= Fwindow_dedicated_p (window
);
1613 return "Cannot switch buffers in a dedicated window";
1617 /* Switch to buffer BUFFER in the selected window.
1618 If NORECORD is non-nil, don't call record_buffer. */
1621 switch_to_buffer_1 (buffer
, norecord
)
1622 Lisp_Object buffer
, norecord
;
1624 register Lisp_Object buf
;
1627 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1630 buf
= Fget_buffer (buffer
);
1633 buf
= Fget_buffer_create (buffer
);
1634 Fset_buffer_major_mode (buf
);
1638 if (NILP (norecord
))
1639 record_buffer (buf
);
1641 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1642 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1649 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1650 doc
: /* Select buffer BUFFER in the current window.
1651 If BUFFER does not identify an existing buffer,
1652 then this function creates a buffer with that name.
1654 When called from Lisp, BUFFER may be a buffer, a string \(a buffer name),
1655 or nil. If BUFFER is nil, then this function chooses a buffer
1656 using `other-buffer'.
1657 Optional second arg NORECORD non-nil means
1658 do not put this buffer at the front of the list of recently selected ones.
1659 This function returns the buffer it switched to.
1661 WARNING: This is NOT the way to work on another buffer temporarily
1662 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1663 the window-buffer correspondences. */)
1665 Lisp_Object buffer
, norecord
;
1669 if (EQ (buffer
, Fwindow_buffer (selected_window
)))
1670 /* Basically a NOP. Avoid signalling an error if the selected window
1671 is dedicated, or a minibuffer, ... */
1672 return Fset_buffer (buffer
);
1674 err
= no_switch_window (selected_window
);
1675 if (err
) error (err
);
1677 return switch_to_buffer_1 (buffer
, norecord
);
1680 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1681 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1682 BUFFER may be a buffer, a string \(a buffer name), or nil.
1683 If BUFFER is a string which is not the name of an existing buffer,
1684 then this function creates a buffer with that name.
1685 If BUFFER is nil, then it chooses some other buffer.
1686 If `pop-up-windows' is non-nil, windows can be split to do this.
1687 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1688 window even if BUFFER is already visible in the selected window,
1689 and ignore `same-window-regexps' and `same-window-buffer-names'.
1690 This function returns the buffer it switched to.
1691 This uses the function `display-buffer' as a subroutine; see the documentation
1692 of `display-buffer' for additional customization information.
1694 Optional third arg NORECORD non-nil means
1695 do not put this buffer at the front of the list of recently selected ones. */)
1696 (buffer
, other_window
, norecord
)
1697 Lisp_Object buffer
, other_window
, norecord
;
1699 register Lisp_Object buf
;
1701 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1704 buf
= Fget_buffer (buffer
);
1707 buf
= Fget_buffer_create (buffer
);
1708 Fset_buffer_major_mode (buf
);
1712 if (NILP (norecord
))
1713 /* Why bother ? Fselect_window will do it for us anyway. -stef */
1714 record_buffer (buf
);
1715 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
), norecord
);
1719 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1720 doc
: /* Return the current buffer as a Lisp object. */)
1723 register Lisp_Object buf
;
1724 XSETBUFFER (buf
, current_buffer
);
1728 /* Set the current buffer to B.
1730 We previously set windows_or_buffers_changed here to invalidate
1731 global unchanged information in beg_unchanged and end_unchanged.
1732 This is no longer necessary because we now compute unchanged
1733 information on a buffer-basis. Every action affecting other
1734 windows than the selected one requires a select_window at some
1735 time, and that increments windows_or_buffers_changed. */
1738 set_buffer_internal (b
)
1739 register struct buffer
*b
;
1741 if (current_buffer
!= b
)
1742 set_buffer_internal_1 (b
);
1745 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1746 This is used by redisplay. */
1749 set_buffer_internal_1 (b
)
1750 register struct buffer
*b
;
1752 register struct buffer
*old_buf
;
1753 register Lisp_Object tail
, valcontents
;
1756 #ifdef USE_MMAP_FOR_BUFFERS
1757 if (b
->text
->beg
== NULL
)
1758 enlarge_buffer_text (b
, 0);
1759 #endif /* USE_MMAP_FOR_BUFFERS */
1761 if (current_buffer
== b
)
1764 old_buf
= current_buffer
;
1766 last_known_column_point
= -1; /* invalidate indentation cache */
1770 /* Put the undo list back in the base buffer, so that it appears
1771 that an indirect buffer shares the undo list of its base. */
1772 if (old_buf
->base_buffer
)
1773 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1775 /* If the old current buffer has markers to record PT, BEGV and ZV
1776 when it is not current, update them now. */
1777 if (! NILP (old_buf
->pt_marker
))
1780 XSETBUFFER (obuf
, old_buf
);
1781 set_marker_both (old_buf
->pt_marker
, obuf
,
1782 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1784 if (! NILP (old_buf
->begv_marker
))
1787 XSETBUFFER (obuf
, old_buf
);
1788 set_marker_both (old_buf
->begv_marker
, obuf
,
1789 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1791 if (! NILP (old_buf
->zv_marker
))
1794 XSETBUFFER (obuf
, old_buf
);
1795 set_marker_both (old_buf
->zv_marker
, obuf
,
1796 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1800 /* Get the undo list from the base buffer, so that it appears
1801 that an indirect buffer shares the undo list of its base. */
1803 b
->undo_list
= b
->base_buffer
->undo_list
;
1805 /* If the new current buffer has markers to record PT, BEGV and ZV
1806 when it is not current, fetch them now. */
1807 if (! NILP (b
->pt_marker
))
1809 BUF_PT (b
) = marker_position (b
->pt_marker
);
1810 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1812 if (! NILP (b
->begv_marker
))
1814 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1815 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1817 if (! NILP (b
->zv_marker
))
1819 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1820 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1823 /* Look down buffer's list of local Lisp variables
1824 to find and update any that forward into C variables. */
1826 for (tail
= b
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1828 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1829 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1830 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1831 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1832 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1833 /* Just reference the variable
1834 to cause it to become set for this buffer. */
1835 Fsymbol_value (XCAR (XCAR (tail
)));
1838 /* Do the same with any others that were local to the previous buffer */
1841 for (tail
= old_buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1843 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1844 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1845 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1846 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1847 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1848 /* Just reference the variable
1849 to cause it to become set for this buffer. */
1850 Fsymbol_value (XCAR (XCAR (tail
)));
1854 /* Switch to buffer B temporarily for redisplay purposes.
1855 This avoids certain things that don't need to be done within redisplay. */
1861 register struct buffer
*old_buf
;
1863 if (current_buffer
== b
)
1866 old_buf
= current_buffer
;
1871 /* If the old current buffer has markers to record PT, BEGV and ZV
1872 when it is not current, update them now. */
1873 if (! NILP (old_buf
->pt_marker
))
1876 XSETBUFFER (obuf
, old_buf
);
1877 set_marker_both (old_buf
->pt_marker
, obuf
,
1878 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1880 if (! NILP (old_buf
->begv_marker
))
1883 XSETBUFFER (obuf
, old_buf
);
1884 set_marker_both (old_buf
->begv_marker
, obuf
,
1885 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1887 if (! NILP (old_buf
->zv_marker
))
1890 XSETBUFFER (obuf
, old_buf
);
1891 set_marker_both (old_buf
->zv_marker
, obuf
,
1892 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1896 /* If the new current buffer has markers to record PT, BEGV and ZV
1897 when it is not current, fetch them now. */
1898 if (! NILP (b
->pt_marker
))
1900 BUF_PT (b
) = marker_position (b
->pt_marker
);
1901 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1903 if (! NILP (b
->begv_marker
))
1905 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1906 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1908 if (! NILP (b
->zv_marker
))
1910 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1911 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1915 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1916 doc
: /* Make the buffer BUFFER current for editing operations.
1917 BUFFER may be a buffer or the name of an existing buffer.
1918 See also `save-excursion' when you want to make a buffer current temporarily.
1919 This function does not display the buffer, so its effect ends
1920 when the current command terminates.
1921 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1923 register Lisp_Object buffer
;
1925 register Lisp_Object buf
;
1926 buf
= Fget_buffer (buffer
);
1929 if (NILP (XBUFFER (buf
)->name
))
1930 error ("Selecting deleted buffer");
1931 set_buffer_internal (XBUFFER (buf
));
1935 /* Set the current buffer to BUFFER provided it is alive. */
1938 set_buffer_if_live (buffer
)
1941 if (! NILP (XBUFFER (buffer
)->name
))
1942 Fset_buffer (buffer
);
1946 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1947 Sbarf_if_buffer_read_only
, 0, 0, 0,
1948 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1951 if (!NILP (current_buffer
->read_only
)
1952 && NILP (Vinhibit_read_only
))
1953 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1957 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1958 doc
: /* Put BUFFER at the end of the list of all buffers.
1959 There it is the least likely candidate for `other-buffer' to return;
1960 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1961 You can specify a buffer name as BUFFER, or an actual buffer object.
1962 If BUFFER is nil or omitted, bury the current buffer.
1963 Also, if BUFFER is nil or omitted, remove the current buffer from the
1964 selected window if it is displayed there. */)
1966 register Lisp_Object buffer
;
1968 /* Figure out what buffer we're going to bury. */
1972 XSETBUFFER (buffer
, current_buffer
);
1974 tem
= Fwindow_buffer (selected_window
);
1975 /* If we're burying the current buffer, unshow it. */
1976 if (EQ (buffer
, tem
))
1978 if (NILP (Fwindow_dedicated_p (selected_window
)))
1979 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1980 else if (NILP (XWINDOW (selected_window
)->parent
))
1981 Ficonify_frame (Fwindow_frame (selected_window
));
1983 Fdelete_window (selected_window
);
1990 buf1
= Fget_buffer (buffer
);
1996 /* Move buffer to the end of the buffer list. Do nothing if the
1997 buffer is killed. */
1998 if (!NILP (XBUFFER (buffer
)->name
))
2000 Lisp_Object aelt
, link
;
2002 aelt
= Frassq (buffer
, Vbuffer_alist
);
2003 link
= Fmemq (aelt
, Vbuffer_alist
);
2004 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
2005 XSETCDR (link
, Qnil
);
2006 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
2008 /* Removing BUFFER from frame-specific lists
2009 has the effect of putting BUFFER at the end
2010 of the combined list in each frame. */
2011 frames_discard_buffer (buffer
);
2017 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2018 doc
: /* Delete the entire contents of the current buffer.
2019 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2020 so the buffer is truly empty after this. */)
2027 current_buffer
->last_window_start
= 1;
2028 /* Prevent warnings, or suspension of auto saving, that would happen
2029 if future size is less than past size. Use of erase-buffer
2030 implies that the future text is not really related to the past text. */
2031 XSETFASTINT (current_buffer
->save_length
, 0);
2036 validate_region (b
, e
)
2037 register Lisp_Object
*b
, *e
;
2039 CHECK_NUMBER_COERCE_MARKER (*b
);
2040 CHECK_NUMBER_COERCE_MARKER (*e
);
2042 if (XINT (*b
) > XINT (*e
))
2045 tem
= *b
; *b
= *e
; *e
= tem
;
2048 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2049 && XINT (*e
) <= ZV
))
2050 args_out_of_range (*b
, *e
);
2053 /* Advance BYTE_POS up to a character boundary
2054 and return the adjusted position. */
2057 advance_to_char_boundary (byte_pos
)
2062 if (byte_pos
== BEG
)
2063 /* Beginning of buffer is always a character boundary. */
2066 c
= FETCH_BYTE (byte_pos
);
2067 if (! CHAR_HEAD_P (c
))
2069 /* We should advance BYTE_POS only when C is a constituent of a
2070 multibyte sequence. */
2071 int orig_byte_pos
= byte_pos
;
2076 c
= FETCH_BYTE (byte_pos
);
2078 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2080 if (byte_pos
< orig_byte_pos
)
2081 byte_pos
= orig_byte_pos
;
2082 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2083 surely advance to the correct character boundary. If C is
2084 not, BYTE_POS was unchanged. */
2090 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2092 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2093 If FLAG is t, this makes the buffer a multibyte buffer.
2094 If FLAG is nil, this makes the buffer a single-byte buffer.
2095 In these cases, the buffer contents remain unchanged as a sequence of
2096 bytes but the contents viewed as characters do change.
2097 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2098 all eight-bit bytes to eight-bit characters.
2099 If the multibyte flag was really changed, undo information of the
2100 current buffer is cleared. */)
2104 struct Lisp_Marker
*tail
, *markers
;
2105 struct buffer
*other
;
2106 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2108 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2109 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2111 if (current_buffer
->base_buffer
)
2112 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2114 /* Do nothing if nothing actually changes. */
2115 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2118 /* It would be better to update the list,
2119 but this is good enough for now. */
2121 current_buffer
->undo_list
= Qt
;
2123 /* If the cached position is for this buffer, clear it out. */
2124 clear_charpos_cache (current_buffer
);
2127 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2129 begv
= BEGV
, zv
= ZV
;
2139 /* Do this first, so it can use CHAR_TO_BYTE
2140 to calculate the old correspondences. */
2141 set_intervals_multibyte (0);
2143 current_buffer
->enable_multibyte_characters
= Qnil
;
2149 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2152 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2153 tail
->charpos
= tail
->bytepos
;
2155 /* Convert multibyte form of 8-bit characters to unibyte. */
2170 if (ASCII_BYTE_P (*p
))
2172 else if (CHAR_BYTE8_HEAD_P (*p
))
2174 c
= STRING_CHAR_AND_LENGTH (p
, stop
- pos
, bytes
);
2175 /* Delete all bytes for this 8-bit character but the
2176 last one, and change the last one to the charcter
2179 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2191 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2192 p
+= bytes
, pos
+= bytes
;
2196 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2202 unsigned char *p
, *pend
;
2204 /* Be sure not to have a multibyte sequence striding over the GAP.
2205 Ex: We change this: "...abc\302 _GAP_ \241def..."
2206 to: "...abc _GAP_ \302\241def..." */
2209 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2210 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2212 unsigned char *p
= GPT_ADDR
- 1;
2214 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2215 if (BASE_LEADING_CODE_P (*p
))
2217 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2219 move_gap_both (new_gpt
, new_gpt
);
2223 /* Make the buffer contents valid as multibyte by converting
2224 8-bit characters to multibyte form. */
2242 if (ASCII_BYTE_P (*p
))
2244 else if (EQ (flag
, Qt
) && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2245 p
+= bytes
, pos
+= bytes
;
2248 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2251 c
= BYTE8_TO_CHAR (*p
);
2252 bytes
= CHAR_STRING (c
, tmp
);
2254 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2256 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2257 /* Now the gap is after the just inserted data. */
2275 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2277 /* Do this first, so that chars_in_text asks the right question.
2278 set_intervals_multibyte needs it too. */
2279 current_buffer
->enable_multibyte_characters
= Qt
;
2281 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2282 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2284 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2286 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2287 if (BEGV_BYTE
> GPT_BYTE
)
2288 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2290 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2292 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2293 if (ZV_BYTE
> GPT_BYTE
)
2294 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2296 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2299 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2302 if (pt_byte
> GPT_BYTE
)
2303 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2305 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2306 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2309 tail
= markers
= BUF_MARKERS (current_buffer
);
2311 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2312 getting confused by the markers that have not yet been updated.
2313 It is also a signal that it should never create a marker. */
2314 BUF_MARKERS (current_buffer
) = NULL
;
2316 for (; tail
; tail
= tail
->next
)
2318 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2319 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2322 /* Make sure no markers were put on the chain
2323 while the chain value was incorrect. */
2324 if (BUF_MARKERS (current_buffer
))
2327 BUF_MARKERS (current_buffer
) = markers
;
2329 /* Do this last, so it can calculate the new correspondences
2330 between chars and bytes. */
2331 set_intervals_multibyte (1);
2335 current_buffer
->undo_list
= Qnil
;
2337 /* Changing the multibyteness of a buffer means that all windows
2338 showing that buffer must be updated thoroughly. */
2339 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2340 ++windows_or_buffers_changed
;
2342 /* Copy this buffer's new multibyte status
2343 into all of its indirect buffers. */
2344 for (other
= all_buffers
; other
; other
= other
->next
)
2345 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2347 other
->enable_multibyte_characters
2348 = current_buffer
->enable_multibyte_characters
;
2349 other
->prevent_redisplay_optimizations_p
= 1;
2352 /* Restore the modifiedness of the buffer. */
2353 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2354 Fset_buffer_modified_p (Qnil
);
2357 /* Update coding systems of this buffer's process (if any). */
2359 Lisp_Object process
;
2361 process
= Fget_buffer_process (Fcurrent_buffer ());
2362 if (PROCESSP (process
))
2363 setup_process_coding_systems (process
);
2365 #endif /* subprocesses */
2370 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2372 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2373 Most local variable bindings are eliminated so that the default values
2374 become effective once more. Also, the syntax table is set from
2375 `standard-syntax-table', the local keymap is set to nil,
2376 and the abbrev table from `fundamental-mode-abbrev-table'.
2377 This function also forces redisplay of the mode line.
2379 Every function to select a new major mode starts by
2380 calling this function.
2382 As a special exception, local variables whose names have
2383 a non-nil `permanent-local' property are not eliminated by this function.
2385 The first thing this function does is run
2386 the normal hook `change-major-mode-hook'. */)
2389 register Lisp_Object alist
, sym
, tem
;
2392 if (!NILP (Vrun_hooks
))
2393 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2394 oalist
= current_buffer
->local_var_alist
;
2396 /* Make sure none of the bindings in oalist
2397 remain swapped in, in their symbols. */
2399 swap_out_buffer_local_variables (current_buffer
);
2401 /* Actually eliminate all local bindings of this buffer. */
2403 reset_buffer_local_variables (current_buffer
, 0);
2405 /* Any which are supposed to be permanent,
2406 make local again, with the same values they had. */
2408 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2410 sym
= XCAR (XCAR (alist
));
2411 tem
= Fget (sym
, Qpermanent_local
);
2414 Fmake_local_variable (sym
);
2415 Fset (sym
, XCDR (XCAR (alist
)));
2419 /* Force mode-line redisplay. Useful here because all major mode
2420 commands call this function. */
2421 update_mode_lines
++;
2426 /* Make sure no local variables remain set up with buffer B
2427 for their current values. */
2430 swap_out_buffer_local_variables (b
)
2433 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2435 XSETBUFFER (buffer
, b
);
2436 oalist
= b
->local_var_alist
;
2438 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2440 sym
= XCAR (XCAR (alist
));
2442 /* Need not do anything if some other buffer's binding is now encached. */
2443 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2444 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2446 /* Symbol is set up for this buffer's old local value.
2447 Set it up for the current buffer with the default value. */
2449 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2450 /* Store the symbol's current value into the alist entry
2451 it is currently set up for. This is so that, if the
2452 local is marked permanent, and we make it local again
2453 later in Fkill_all_local_variables, we don't lose the value. */
2454 XSETCDR (XCAR (tem
),
2455 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2456 /* Switch to the symbol's default-value alist entry. */
2458 /* Mark it as current for buffer B. */
2459 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2460 /* Store the current value into any forwarding in the symbol. */
2461 store_symval_forwarding (sym
,
2462 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2468 /* Find all the overlays in the current buffer that contain position POS.
2469 Return the number found, and store them in a vector in *VEC_PTR.
2470 Store in *LEN_PTR the size allocated for the vector.
2471 Store in *NEXT_PTR the next position after POS where an overlay starts,
2472 or ZV if there are no more overlays.
2473 Store in *PREV_PTR the previous position before POS where an overlay ends,
2474 or where an overlay starts which ends at or after POS;
2475 or BEGV if there are no such overlays.
2476 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2478 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2479 when this function is called.
2481 If EXTEND is non-zero, we make the vector bigger if necessary.
2482 If EXTEND is zero, we never extend the vector,
2483 and we store only as many overlays as will fit.
2484 But we still return the total number of overlays.
2486 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2487 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2488 default (BEGV or ZV). */
2491 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2494 Lisp_Object
**vec_ptr
;
2500 Lisp_Object overlay
, start
, end
;
2501 struct Lisp_Overlay
*tail
;
2504 Lisp_Object
*vec
= *vec_ptr
;
2507 int inhibit_storing
= 0;
2509 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2511 int startpos
, endpos
;
2513 XSETMISC (overlay
, tail
);
2515 start
= OVERLAY_START (overlay
);
2516 end
= OVERLAY_END (overlay
);
2517 endpos
= OVERLAY_POSITION (end
);
2524 startpos
= OVERLAY_POSITION (start
);
2525 /* This one ends at or after POS
2526 so its start counts for PREV_PTR if it's before POS. */
2527 if (prev
< startpos
&& startpos
< pos
)
2531 if (startpos
<= pos
)
2535 /* The supplied vector is full.
2536 Either make it bigger, or don't store any more in it. */
2539 /* Make it work with an initial len == 0. */
2544 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2548 inhibit_storing
= 1;
2551 if (!inhibit_storing
)
2553 /* Keep counting overlays even if we can't return them all. */
2556 else if (startpos
< next
)
2560 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2562 int startpos
, endpos
;
2564 XSETMISC (overlay
, tail
);
2566 start
= OVERLAY_START (overlay
);
2567 end
= OVERLAY_END (overlay
);
2568 startpos
= OVERLAY_POSITION (start
);
2571 if (startpos
< next
)
2575 endpos
= OVERLAY_POSITION (end
);
2582 /* Make it work with an initial len == 0. */
2587 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2591 inhibit_storing
= 1;
2594 if (!inhibit_storing
)
2598 if (startpos
< pos
&& startpos
> prev
)
2601 else if (endpos
< pos
&& endpos
> prev
)
2603 else if (endpos
== pos
&& startpos
> prev
2604 && (!change_req
|| startpos
< pos
))
2615 /* Find all the overlays in the current buffer that overlap the range BEG-END
2616 or are empty at BEG.
2618 Return the number found, and store them in a vector in *VEC_PTR.
2619 Store in *LEN_PTR the size allocated for the vector.
2620 Store in *NEXT_PTR the next position after POS where an overlay starts,
2621 or ZV if there are no more overlays.
2622 Store in *PREV_PTR the previous position before POS where an overlay ends,
2623 or BEGV if there are no previous overlays.
2624 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2626 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2627 when this function is called.
2629 If EXTEND is non-zero, we make the vector bigger if necessary.
2630 If EXTEND is zero, we never extend the vector,
2631 and we store only as many overlays as will fit.
2632 But we still return the total number of overlays. */
2635 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2638 Lisp_Object
**vec_ptr
;
2643 Lisp_Object overlay
, ostart
, oend
;
2644 struct Lisp_Overlay
*tail
;
2647 Lisp_Object
*vec
= *vec_ptr
;
2650 int inhibit_storing
= 0;
2652 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2654 int startpos
, endpos
;
2656 XSETMISC (overlay
, tail
);
2658 ostart
= OVERLAY_START (overlay
);
2659 oend
= OVERLAY_END (overlay
);
2660 endpos
= OVERLAY_POSITION (oend
);
2667 startpos
= OVERLAY_POSITION (ostart
);
2668 /* Count an interval if it either overlaps the range
2669 or is empty at the start of the range. */
2670 if ((beg
< endpos
&& startpos
< end
)
2671 || (startpos
== endpos
&& beg
== endpos
))
2675 /* The supplied vector is full.
2676 Either make it bigger, or don't store any more in it. */
2679 /* Make it work with an initial len == 0. */
2684 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2688 inhibit_storing
= 1;
2691 if (!inhibit_storing
)
2693 /* Keep counting overlays even if we can't return them all. */
2696 else if (startpos
< next
)
2700 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2702 int startpos
, endpos
;
2704 XSETMISC (overlay
, tail
);
2706 ostart
= OVERLAY_START (overlay
);
2707 oend
= OVERLAY_END (overlay
);
2708 startpos
= OVERLAY_POSITION (ostart
);
2711 if (startpos
< next
)
2715 endpos
= OVERLAY_POSITION (oend
);
2716 /* Count an interval if it either overlaps the range
2717 or is empty at the start of the range. */
2718 if ((beg
< endpos
&& startpos
< end
)
2719 || (startpos
== endpos
&& beg
== endpos
))
2725 /* Make it work with an initial len == 0. */
2730 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2734 inhibit_storing
= 1;
2737 if (!inhibit_storing
)
2741 else if (endpos
< beg
&& endpos
> prev
)
2753 /* Return non-zero if there exists an overlay with a non-nil
2754 `mouse-face' property overlapping OVERLAY. */
2757 mouse_face_overlay_overlaps (overlay
)
2758 Lisp_Object overlay
;
2760 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2761 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2763 Lisp_Object
*v
, tem
;
2766 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2767 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2770 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2771 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2774 for (i
= 0; i
< n
; ++i
)
2775 if (!EQ (v
[i
], overlay
)
2776 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2785 /* Fast function to just test if we're at an overlay boundary. */
2787 overlay_touches_p (pos
)
2790 Lisp_Object overlay
;
2791 struct Lisp_Overlay
*tail
;
2793 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2797 XSETMISC (overlay
,tail
);
2798 if (!GC_OVERLAYP (overlay
))
2801 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2804 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2808 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2812 XSETMISC (overlay
, tail
);
2813 if (!GC_OVERLAYP (overlay
))
2816 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2819 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2827 Lisp_Object overlay
;
2833 compare_overlays (v1
, v2
)
2834 const void *v1
, *v2
;
2836 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2837 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2838 if (s1
->priority
!= s2
->priority
)
2839 return s1
->priority
- s2
->priority
;
2840 if (s1
->beg
!= s2
->beg
)
2841 return s1
->beg
- s2
->beg
;
2842 if (s1
->end
!= s2
->end
)
2843 return s2
->end
- s1
->end
;
2847 /* Sort an array of overlays by priority. The array is modified in place.
2848 The return value is the new size; this may be smaller than the original
2849 size if some of the overlays were invalid or were window-specific. */
2851 sort_overlays (overlay_vec
, noverlays
, w
)
2852 Lisp_Object
*overlay_vec
;
2857 struct sortvec
*sortvec
;
2858 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2860 /* Put the valid and relevant overlays into sortvec. */
2862 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2865 Lisp_Object overlay
;
2867 overlay
= overlay_vec
[i
];
2868 if (OVERLAY_VALID (overlay
)
2869 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2870 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2872 /* If we're interested in a specific window, then ignore
2873 overlays that are limited to some other window. */
2878 window
= Foverlay_get (overlay
, Qwindow
);
2879 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2883 /* This overlay is good and counts: put it into sortvec. */
2884 sortvec
[j
].overlay
= overlay
;
2885 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2886 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2887 tem
= Foverlay_get (overlay
, Qpriority
);
2889 sortvec
[j
].priority
= XINT (tem
);
2891 sortvec
[j
].priority
= 0;
2897 /* Sort the overlays into the proper order: increasing priority. */
2900 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2902 for (i
= 0; i
< noverlays
; i
++)
2903 overlay_vec
[i
] = sortvec
[i
].overlay
;
2909 Lisp_Object string
, string2
;
2916 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2917 int size
; /* Allocated length of that array. */
2918 int used
; /* How much of the array is currently in use. */
2919 int bytes
; /* Total length of the strings in buf. */
2922 /* Buffers for storing information about the overlays touching a given
2923 position. These could be automatic variables in overlay_strings, but
2924 it's more efficient to hold onto the memory instead of repeatedly
2925 allocating and freeing it. */
2926 static struct sortstrlist overlay_heads
, overlay_tails
;
2927 static unsigned char *overlay_str_buf
;
2929 /* Allocated length of overlay_str_buf. */
2930 static int overlay_str_len
;
2932 /* A comparison function suitable for passing to qsort. */
2934 cmp_for_strings (as1
, as2
)
2937 struct sortstr
*s1
= (struct sortstr
*)as1
;
2938 struct sortstr
*s2
= (struct sortstr
*)as2
;
2939 if (s1
->size
!= s2
->size
)
2940 return s2
->size
- s1
->size
;
2941 if (s1
->priority
!= s2
->priority
)
2942 return s1
->priority
- s2
->priority
;
2947 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2948 struct sortstrlist
*ssl
;
2949 Lisp_Object str
, str2
, pri
;
2954 if (ssl
->used
== ssl
->size
)
2960 ssl
->buf
= ((struct sortstr
*)
2961 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2963 ssl
->buf
[ssl
->used
].string
= str
;
2964 ssl
->buf
[ssl
->used
].string2
= str2
;
2965 ssl
->buf
[ssl
->used
].size
= size
;
2966 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2969 if (NILP (current_buffer
->enable_multibyte_characters
))
2970 nbytes
= SCHARS (str
);
2971 else if (! STRING_MULTIBYTE (str
))
2972 nbytes
= count_size_as_multibyte (SDATA (str
),
2975 nbytes
= SBYTES (str
);
2977 ssl
->bytes
+= nbytes
;
2981 if (NILP (current_buffer
->enable_multibyte_characters
))
2982 nbytes
= SCHARS (str2
);
2983 else if (! STRING_MULTIBYTE (str2
))
2984 nbytes
= count_size_as_multibyte (SDATA (str2
),
2987 nbytes
= SBYTES (str2
);
2989 ssl
->bytes
+= nbytes
;
2993 /* Return the concatenation of the strings associated with overlays that
2994 begin or end at POS, ignoring overlays that are specific to a window
2995 other than W. The strings are concatenated in the appropriate order:
2996 shorter overlays nest inside longer ones, and higher priority inside
2997 lower. Normally all of the after-strings come first, but zero-sized
2998 overlays have their after-strings ride along with the before-strings
2999 because it would look strange to print them inside-out.
3001 Returns the string length, and stores the contents indirectly through
3002 PSTR, if that variable is non-null. The string may be overwritten by
3003 subsequent calls. */
3006 overlay_strings (pos
, w
, pstr
)
3009 unsigned char **pstr
;
3011 Lisp_Object overlay
, window
, str
;
3012 struct Lisp_Overlay
*ov
;
3013 int startpos
, endpos
;
3014 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
3016 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3017 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3018 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3020 XSETMISC (overlay
, ov
);
3021 eassert (OVERLAYP (overlay
));
3023 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3024 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3027 if (endpos
!= pos
&& startpos
!= pos
)
3029 window
= Foverlay_get (overlay
, Qwindow
);
3030 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3033 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3034 record_overlay_string (&overlay_heads
, str
,
3036 ? Foverlay_get (overlay
, Qafter_string
)
3038 Foverlay_get (overlay
, Qpriority
),
3040 else if (endpos
== pos
3041 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3042 record_overlay_string (&overlay_tails
, str
, Qnil
,
3043 Foverlay_get (overlay
, Qpriority
),
3046 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3048 XSETMISC (overlay
, ov
);
3049 eassert (OVERLAYP (overlay
));
3051 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3052 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3055 if (endpos
!= pos
&& startpos
!= pos
)
3057 window
= Foverlay_get (overlay
, Qwindow
);
3058 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3061 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3062 record_overlay_string (&overlay_heads
, str
,
3064 ? Foverlay_get (overlay
, Qafter_string
)
3066 Foverlay_get (overlay
, Qpriority
),
3068 else if (endpos
== pos
3069 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3070 record_overlay_string (&overlay_tails
, str
, Qnil
,
3071 Foverlay_get (overlay
, Qpriority
),
3074 if (overlay_tails
.used
> 1)
3075 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3077 if (overlay_heads
.used
> 1)
3078 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3080 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3085 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3087 if (total
> overlay_str_len
)
3089 overlay_str_len
= total
;
3090 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3093 p
= overlay_str_buf
;
3094 for (i
= overlay_tails
.used
; --i
>= 0;)
3097 tem
= overlay_tails
.buf
[i
].string
;
3098 nbytes
= copy_text (SDATA (tem
), p
,
3100 STRING_MULTIBYTE (tem
), multibyte
);
3103 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3106 tem
= overlay_heads
.buf
[i
].string
;
3107 nbytes
= copy_text (SDATA (tem
), p
,
3109 STRING_MULTIBYTE (tem
), multibyte
);
3111 tem
= overlay_heads
.buf
[i
].string2
;
3114 nbytes
= copy_text (SDATA (tem
), p
,
3116 STRING_MULTIBYTE (tem
), multibyte
);
3120 if (p
!= overlay_str_buf
+ total
)
3123 *pstr
= overlay_str_buf
;
3129 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3132 recenter_overlay_lists (buf
, pos
)
3136 Lisp_Object overlay
, beg
, end
;
3137 struct Lisp_Overlay
*prev
, *tail
, *next
;
3139 /* See if anything in overlays_before should move to overlays_after. */
3141 /* We don't strictly need prev in this loop; it should always be nil.
3142 But we use it for symmetry and in case that should cease to be true
3143 with some future change. */
3145 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3148 XSETMISC (overlay
, tail
);
3150 /* If the overlay is not valid, get rid of it. */
3151 if (!OVERLAY_VALID (overlay
))
3156 /* Splice the cons cell TAIL out of overlays_before. */
3160 buf
->overlays_before
= next
;
3166 beg
= OVERLAY_START (overlay
);
3167 end
= OVERLAY_END (overlay
);
3169 if (OVERLAY_POSITION (end
) > pos
)
3171 /* OVERLAY needs to be moved. */
3172 int where
= OVERLAY_POSITION (beg
);
3173 struct Lisp_Overlay
*other
, *other_prev
;
3175 /* Splice the cons cell TAIL out of overlays_before. */
3179 buf
->overlays_before
= next
;
3181 /* Search thru overlays_after for where to put it. */
3183 for (other
= buf
->overlays_after
; other
;
3184 other_prev
= other
, other
= other
->next
)
3186 Lisp_Object otherbeg
, otheroverlay
;
3188 XSETMISC (otheroverlay
, other
);
3189 eassert (OVERLAY_VALID (otheroverlay
));
3191 otherbeg
= OVERLAY_START (otheroverlay
);
3192 if (OVERLAY_POSITION (otherbeg
) >= where
)
3196 /* Add TAIL to overlays_after before OTHER. */
3199 other_prev
->next
= tail
;
3201 buf
->overlays_after
= tail
;
3205 /* We've reached the things that should stay in overlays_before.
3206 All the rest of overlays_before must end even earlier,
3211 /* See if anything in overlays_after should be in overlays_before. */
3213 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3216 XSETMISC (overlay
, tail
);
3218 /* If the overlay is not valid, get rid of it. */
3219 if (!OVERLAY_VALID (overlay
))
3224 /* Splice the cons cell TAIL out of overlays_after. */
3228 buf
->overlays_after
= next
;
3234 beg
= OVERLAY_START (overlay
);
3235 end
= OVERLAY_END (overlay
);
3237 /* Stop looking, when we know that nothing further
3238 can possibly end before POS. */
3239 if (OVERLAY_POSITION (beg
) > pos
)
3242 if (OVERLAY_POSITION (end
) <= pos
)
3244 /* OVERLAY needs to be moved. */
3245 int where
= OVERLAY_POSITION (end
);
3246 struct Lisp_Overlay
*other
, *other_prev
;
3248 /* Splice the cons cell TAIL out of overlays_after. */
3252 buf
->overlays_after
= next
;
3254 /* Search thru overlays_before for where to put it. */
3256 for (other
= buf
->overlays_before
; other
;
3257 other_prev
= other
, other
= other
->next
)
3259 Lisp_Object otherend
, otheroverlay
;
3261 XSETMISC (otheroverlay
, other
);
3262 eassert (OVERLAY_VALID (otheroverlay
));
3264 otherend
= OVERLAY_END (otheroverlay
);
3265 if (OVERLAY_POSITION (otherend
) <= where
)
3269 /* Add TAIL to overlays_before before OTHER. */
3272 other_prev
->next
= tail
;
3274 buf
->overlays_before
= tail
;
3279 buf
->overlay_center
= pos
;
3283 adjust_overlays_for_insert (pos
, length
)
3287 /* After an insertion, the lists are still sorted properly,
3288 but we may need to update the value of the overlay center. */
3289 if (current_buffer
->overlay_center
>= pos
)
3290 current_buffer
->overlay_center
+= length
;
3294 adjust_overlays_for_delete (pos
, length
)
3298 if (current_buffer
->overlay_center
< pos
)
3299 /* The deletion was to our right. No change needed; the before- and
3300 after-lists are still consistent. */
3302 else if (current_buffer
->overlay_center
> pos
+ length
)
3303 /* The deletion was to our left. We need to adjust the center value
3304 to account for the change in position, but the lists are consistent
3305 given the new value. */
3306 current_buffer
->overlay_center
-= length
;
3308 /* We're right in the middle. There might be things on the after-list
3309 that now belong on the before-list. Recentering will move them,
3310 and also update the center point. */
3311 recenter_overlay_lists (current_buffer
, pos
);
3314 /* Fix up overlays that were garbled as a result of permuting markers
3315 in the range START through END. Any overlay with at least one
3316 endpoint in this range will need to be unlinked from the overlay
3317 list and reinserted in its proper place.
3318 Such an overlay might even have negative size at this point.
3319 If so, we'll make the overlay empty. */
3321 fix_start_end_in_overlays (start
, end
)
3322 register int start
, end
;
3324 Lisp_Object overlay
;
3325 struct Lisp_Overlay
*before_list
, *after_list
;
3326 /* These are either nil, indicating that before_list or after_list
3327 should be assigned, or the cons cell the cdr of which should be
3329 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3330 /* 'Parent', likewise, indicates a cons cell or
3331 current_buffer->overlays_before or overlays_after, depending
3332 which loop we're in. */
3333 struct Lisp_Overlay
*tail
, *parent
;
3334 int startpos
, endpos
;
3336 /* This algorithm shifts links around instead of consing and GCing.
3337 The loop invariant is that before_list (resp. after_list) is a
3338 well-formed list except that its last element, the CDR of beforep
3339 (resp. afterp) if beforep (afterp) isn't nil or before_list
3340 (after_list) if it is, is still uninitialized. So it's not a bug
3341 that before_list isn't initialized, although it may look
3343 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3345 XSETMISC (overlay
, tail
);
3347 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3348 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3350 /* If the overlay is backwards, make it empty. */
3351 if (endpos
< startpos
)
3354 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3362 || (startpos
>= start
&& startpos
< end
))
3364 /* Add it to the end of the wrong list. Later on,
3365 recenter_overlay_lists will move it to the right place. */
3366 if (endpos
< current_buffer
->overlay_center
)
3371 afterp
->next
= tail
;
3379 beforep
->next
= tail
;
3383 current_buffer
->overlays_before
= tail
->next
;
3385 parent
->next
= tail
->next
;
3389 parent
= tail
, tail
= parent
->next
;
3391 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3393 XSETMISC (overlay
, tail
);
3395 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3396 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3398 /* If the overlay is backwards, make it empty. */
3399 if (endpos
< startpos
)
3402 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3406 if (startpos
>= end
)
3409 if (startpos
>= start
3410 || (endpos
>= start
&& endpos
< end
))
3412 if (endpos
< current_buffer
->overlay_center
)
3417 afterp
->next
= tail
;
3425 beforep
->next
= tail
;
3429 current_buffer
->overlays_after
= tail
->next
;
3431 parent
->next
= tail
->next
;
3435 parent
= tail
, tail
= parent
->next
;
3438 /* Splice the constructed (wrong) lists into the buffer's lists,
3439 and let the recenter function make it sane again. */
3442 beforep
->next
= current_buffer
->overlays_before
;
3443 current_buffer
->overlays_before
= before_list
;
3445 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3449 afterp
->next
= current_buffer
->overlays_after
;
3450 current_buffer
->overlays_after
= after_list
;
3452 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3455 /* We have two types of overlay: the one whose ending marker is
3456 after-insertion-marker (this is the usual case) and the one whose
3457 ending marker is before-insertion-marker. When `overlays_before'
3458 contains overlays of the latter type and the former type in this
3459 order and both overlays end at inserting position, inserting a text
3460 increases only the ending marker of the latter type, which results
3461 in incorrect ordering of `overlays_before'.
3463 This function fixes ordering of overlays in the slot
3464 `overlays_before' of the buffer *BP. Before the insertion, `point'
3465 was at PREV, and now is at POS. */
3468 fix_overlays_before (bp
, prev
, pos
)
3470 EMACS_INT prev
, pos
;
3472 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3473 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3477 /* After the insertion, the several overlays may be in incorrect
3478 order. The possibility is that, in the list `overlays_before',
3479 an overlay which ends at POS appears after an overlay which ends
3480 at PREV. Since POS is greater than PREV, we must fix the
3481 ordering of these overlays, by moving overlays ends at POS before
3482 the overlays ends at PREV. */
3484 /* At first, find a place where disordered overlays should be linked
3485 in. It is where an overlay which end before POS exists. (i.e. an
3486 overlay whose ending marker is after-insertion-marker if disorder
3489 && (XSETMISC (tem
, tail
),
3490 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3496 /* If we don't find such an overlay,
3497 or the found one ends before PREV,
3498 or the found one is the last one in the list,
3499 we don't have to fix anything. */
3500 if (!tail
|| end
< prev
|| !tail
->next
)
3503 right_pair
= parent
;
3507 /* Now, end position of overlays in the list TAIL should be before
3508 or equal to PREV. In the loop, an overlay which ends at POS is
3509 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3510 we found an overlay which ends before PREV, the remaining
3511 overlays are in correct order. */
3514 XSETMISC (tem
, tail
);
3515 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3518 { /* This overlay is disordered. */
3519 struct Lisp_Overlay
*found
= tail
;
3521 /* Unlink the found overlay. */
3523 parent
->next
= tail
;
3524 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3525 and link it into the right place. */
3528 found
->next
= bp
->overlays_before
;
3529 bp
->overlays_before
= found
;
3533 found
->next
= right_pair
->next
;
3534 right_pair
->next
= found
;
3537 else if (end
== prev
)
3542 else /* No more disordered overlay. */
3547 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3548 doc
: /* Return t if OBJECT is an overlay. */)
3552 return (OVERLAYP (object
) ? Qt
: Qnil
);
3555 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3556 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3557 If omitted, BUFFER defaults to the current buffer.
3558 BEG and END may be integers or markers.
3559 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3560 front delimiter advance when text is inserted there.
3561 The fifth arg REAR-ADVANCE, if non-nil, makes the
3562 rear delimiter advance when text is inserted there. */)
3563 (beg
, end
, buffer
, front_advance
, rear_advance
)
3564 Lisp_Object beg
, end
, buffer
;
3565 Lisp_Object front_advance
, rear_advance
;
3567 Lisp_Object overlay
;
3571 XSETBUFFER (buffer
, current_buffer
);
3573 CHECK_BUFFER (buffer
);
3575 && ! EQ (Fmarker_buffer (beg
), buffer
))
3576 error ("Marker points into wrong buffer");
3578 && ! EQ (Fmarker_buffer (end
), buffer
))
3579 error ("Marker points into wrong buffer");
3581 CHECK_NUMBER_COERCE_MARKER (beg
);
3582 CHECK_NUMBER_COERCE_MARKER (end
);
3584 if (XINT (beg
) > XINT (end
))
3587 temp
= beg
; beg
= end
; end
= temp
;
3590 b
= XBUFFER (buffer
);
3592 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3593 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3595 if (!NILP (front_advance
))
3596 XMARKER (beg
)->insertion_type
= 1;
3597 if (!NILP (rear_advance
))
3598 XMARKER (end
)->insertion_type
= 1;
3600 overlay
= allocate_misc ();
3601 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3602 XOVERLAY (overlay
)->start
= beg
;
3603 XOVERLAY (overlay
)->end
= end
;
3604 XOVERLAY (overlay
)->plist
= Qnil
;
3605 XOVERLAY (overlay
)->next
= NULL
;
3607 /* Put the new overlay on the wrong list. */
3608 end
= OVERLAY_END (overlay
);
3609 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3611 if (b
->overlays_after
)
3612 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3613 b
->overlays_after
= XOVERLAY (overlay
);
3617 if (b
->overlays_before
)
3618 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3619 b
->overlays_before
= XOVERLAY (overlay
);
3622 /* This puts it in the right list, and in the right order. */
3623 recenter_overlay_lists (b
, b
->overlay_center
);
3625 /* We don't need to redisplay the region covered by the overlay, because
3626 the overlay has no properties at the moment. */
3631 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3634 modify_overlay (buf
, start
, end
)
3636 EMACS_INT start
, end
;
3645 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3647 /* If this is a buffer not in the selected window,
3648 we must do other windows. */
3649 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3650 windows_or_buffers_changed
= 1;
3651 /* If multiple windows show this buffer, we must do other windows. */
3652 else if (buffer_shared
> 1)
3653 windows_or_buffers_changed
= 1;
3655 ++BUF_OVERLAY_MODIFF (buf
);
3659 Lisp_Object
Fdelete_overlay ();
3661 static struct Lisp_Overlay
*
3662 unchain_overlay (list
, overlay
)
3663 struct Lisp_Overlay
*list
, *overlay
;
3665 struct Lisp_Overlay
*tmp
, *prev
;
3666 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3670 prev
->next
= tmp
->next
;
3673 overlay
->next
= NULL
;
3679 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3680 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3681 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3682 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3684 (overlay
, beg
, end
, buffer
)
3685 Lisp_Object overlay
, beg
, end
, buffer
;
3687 struct buffer
*b
, *ob
;
3688 Lisp_Object obuffer
;
3689 int count
= SPECPDL_INDEX ();
3691 CHECK_OVERLAY (overlay
);
3693 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3695 XSETBUFFER (buffer
, current_buffer
);
3696 CHECK_BUFFER (buffer
);
3699 && ! EQ (Fmarker_buffer (beg
), buffer
))
3700 error ("Marker points into wrong buffer");
3702 && ! EQ (Fmarker_buffer (end
), buffer
))
3703 error ("Marker points into wrong buffer");
3705 CHECK_NUMBER_COERCE_MARKER (beg
);
3706 CHECK_NUMBER_COERCE_MARKER (end
);
3708 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3709 return Fdelete_overlay (overlay
);
3711 if (XINT (beg
) > XINT (end
))
3714 temp
= beg
; beg
= end
; end
= temp
;
3717 specbind (Qinhibit_quit
, Qt
);
3719 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3720 b
= XBUFFER (buffer
);
3721 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3723 /* If the overlay has changed buffers, do a thorough redisplay. */
3724 if (!EQ (buffer
, obuffer
))
3726 /* Redisplay where the overlay was. */
3727 if (!NILP (obuffer
))
3732 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3733 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3735 modify_overlay (ob
, o_beg
, o_end
);
3738 /* Redisplay where the overlay is going to be. */
3739 modify_overlay (b
, XINT (beg
), XINT (end
));
3742 /* Redisplay the area the overlay has just left, or just enclosed. */
3746 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3747 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3749 if (o_beg
== XINT (beg
))
3750 modify_overlay (b
, o_end
, XINT (end
));
3751 else if (o_end
== XINT (end
))
3752 modify_overlay (b
, o_beg
, XINT (beg
));
3755 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3756 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3757 modify_overlay (b
, o_beg
, o_end
);
3761 if (!NILP (obuffer
))
3764 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3766 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3767 eassert (XOVERLAY (overlay
)->next
== NULL
);
3770 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3771 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3773 /* Put the overlay on the wrong list. */
3774 end
= OVERLAY_END (overlay
);
3775 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3777 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3778 b
->overlays_after
= XOVERLAY (overlay
);
3782 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3783 b
->overlays_before
= XOVERLAY (overlay
);
3786 /* This puts it in the right list, and in the right order. */
3787 recenter_overlay_lists (b
, b
->overlay_center
);
3789 return unbind_to (count
, overlay
);
3792 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3793 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3795 Lisp_Object overlay
;
3799 int count
= SPECPDL_INDEX ();
3801 CHECK_OVERLAY (overlay
);
3803 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3807 b
= XBUFFER (buffer
);
3808 specbind (Qinhibit_quit
, Qt
);
3810 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3811 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3812 eassert (XOVERLAY (overlay
)->next
== NULL
);
3814 marker_position (OVERLAY_START (overlay
)),
3815 marker_position (OVERLAY_END (overlay
)));
3816 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3817 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3819 /* When deleting an overlay with before or after strings, turn off
3820 display optimizations for the affected buffer, on the basis that
3821 these strings may contain newlines. This is easier to do than to
3822 check for that situation during redisplay. */
3823 if (!windows_or_buffers_changed
3824 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3825 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3826 b
->prevent_redisplay_optimizations_p
= 1;
3828 return unbind_to (count
, Qnil
);
3831 /* Overlay dissection functions. */
3833 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3834 doc
: /* Return the position at which OVERLAY starts. */)
3836 Lisp_Object overlay
;
3838 CHECK_OVERLAY (overlay
);
3840 return (Fmarker_position (OVERLAY_START (overlay
)));
3843 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3844 doc
: /* Return the position at which OVERLAY ends. */)
3846 Lisp_Object overlay
;
3848 CHECK_OVERLAY (overlay
);
3850 return (Fmarker_position (OVERLAY_END (overlay
)));
3853 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3854 doc
: /* Return the buffer OVERLAY belongs to.
3855 Return nil if OVERLAY has been deleted. */)
3857 Lisp_Object overlay
;
3859 CHECK_OVERLAY (overlay
);
3861 return Fmarker_buffer (OVERLAY_START (overlay
));
3864 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3865 doc
: /* Return a list of the properties on OVERLAY.
3866 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3869 Lisp_Object overlay
;
3871 CHECK_OVERLAY (overlay
);
3873 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3877 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3878 doc
: /* Return a list of the overlays that contain position POS. */)
3883 Lisp_Object
*overlay_vec
;
3887 CHECK_NUMBER_COERCE_MARKER (pos
);
3890 /* We can't use alloca here because overlays_at can call xrealloc. */
3891 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3893 /* Put all the overlays we want in a vector in overlay_vec.
3894 Store the length in len. */
3895 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3896 (int *) 0, (int *) 0, 0);
3898 /* Make a list of them all. */
3899 result
= Flist (noverlays
, overlay_vec
);
3901 xfree (overlay_vec
);
3905 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3906 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3907 Overlap means that at least one character is contained within the overlay
3908 and also contained within the specified region.
3909 Empty overlays are included in the result if they are located at BEG
3910 or between BEG and END. */)
3912 Lisp_Object beg
, end
;
3915 Lisp_Object
*overlay_vec
;
3919 CHECK_NUMBER_COERCE_MARKER (beg
);
3920 CHECK_NUMBER_COERCE_MARKER (end
);
3923 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3925 /* Put all the overlays we want in a vector in overlay_vec.
3926 Store the length in len. */
3927 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3928 (int *) 0, (int *) 0);
3930 /* Make a list of them all. */
3931 result
= Flist (noverlays
, overlay_vec
);
3933 xfree (overlay_vec
);
3937 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3939 doc
: /* Return the next position after POS where an overlay starts or ends.
3940 If there are no more overlay boundaries after POS, return (point-max). */)
3946 Lisp_Object
*overlay_vec
;
3950 CHECK_NUMBER_COERCE_MARKER (pos
);
3953 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3955 /* Put all the overlays we want in a vector in overlay_vec.
3956 Store the length in len.
3957 endpos gets the position where the next overlay starts. */
3958 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3959 &endpos
, (int *) 0, 1);
3961 /* If any of these overlays ends before endpos,
3962 use its ending point instead. */
3963 for (i
= 0; i
< noverlays
; i
++)
3968 oend
= OVERLAY_END (overlay_vec
[i
]);
3969 oendpos
= OVERLAY_POSITION (oend
);
3970 if (oendpos
< endpos
)
3974 xfree (overlay_vec
);
3975 return make_number (endpos
);
3978 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3979 Sprevious_overlay_change
, 1, 1, 0,
3980 doc
: /* Return the previous position before POS where an overlay starts or ends.
3981 If there are no more overlay boundaries before POS, return (point-min). */)
3987 Lisp_Object
*overlay_vec
;
3990 CHECK_NUMBER_COERCE_MARKER (pos
);
3992 /* At beginning of buffer, we know the answer;
3993 avoid bug subtracting 1 below. */
3994 if (XINT (pos
) == BEGV
)
3998 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4000 /* Put all the overlays we want in a vector in overlay_vec.
4001 Store the length in len.
4002 prevpos gets the position of the previous change. */
4003 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4004 (int *) 0, &prevpos
, 1);
4006 xfree (overlay_vec
);
4007 return make_number (prevpos
);
4010 /* These functions are for debugging overlays. */
4012 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4013 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4014 The car has all the overlays before the overlay center;
4015 the cdr has all the overlays after the overlay center.
4016 Recentering overlays moves overlays between these lists.
4017 The lists you get are copies, so that changing them has no effect.
4018 However, the overlays you get are the real objects that the buffer uses. */)
4021 struct Lisp_Overlay
*ol
;
4022 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4023 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4026 before
= Fcons (tmp
, before
);
4028 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4031 after
= Fcons (tmp
, after
);
4033 return Fcons (Fnreverse (before
), Fnreverse (after
));
4036 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4037 doc
: /* Recenter the overlays of the current buffer around position POS.
4038 That makes overlay lookup faster for positions near POS (but perhaps slower
4039 for positions far away from POS). */)
4043 CHECK_NUMBER_COERCE_MARKER (pos
);
4045 recenter_overlay_lists (current_buffer
, XINT (pos
));
4049 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4050 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4052 Lisp_Object overlay
, prop
;
4054 CHECK_OVERLAY (overlay
);
4055 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4058 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4059 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4060 (overlay
, prop
, value
)
4061 Lisp_Object overlay
, prop
, value
;
4063 Lisp_Object tail
, buffer
;
4066 CHECK_OVERLAY (overlay
);
4068 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4070 for (tail
= XOVERLAY (overlay
)->plist
;
4071 CONSP (tail
) && CONSP (XCDR (tail
));
4072 tail
= XCDR (XCDR (tail
)))
4073 if (EQ (XCAR (tail
), prop
))
4075 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4076 XSETCAR (XCDR (tail
), value
);
4079 /* It wasn't in the list, so add it to the front. */
4080 changed
= !NILP (value
);
4081 XOVERLAY (overlay
)->plist
4082 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4084 if (! NILP (buffer
))
4087 modify_overlay (XBUFFER (buffer
),
4088 marker_position (OVERLAY_START (overlay
)),
4089 marker_position (OVERLAY_END (overlay
)));
4090 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4091 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4092 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4093 Fdelete_overlay (overlay
);
4098 /* Subroutine of report_overlay_modification. */
4100 /* Lisp vector holding overlay hook functions to call.
4101 Vector elements come in pairs.
4102 Each even-index element is a list of hook functions.
4103 The following odd-index element is the overlay they came from.
4105 Before the buffer change, we fill in this vector
4106 as we call overlay hook functions.
4107 After the buffer change, we get the functions to call from this vector.
4108 This way we always call the same functions before and after the change. */
4109 static Lisp_Object last_overlay_modification_hooks
;
4111 /* Number of elements actually used in last_overlay_modification_hooks. */
4112 static int last_overlay_modification_hooks_used
;
4114 /* Add one functionlist/overlay pair
4115 to the end of last_overlay_modification_hooks. */
4118 add_overlay_mod_hooklist (functionlist
, overlay
)
4119 Lisp_Object functionlist
, overlay
;
4121 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4123 if (last_overlay_modification_hooks_used
== oldsize
)
4126 old
= last_overlay_modification_hooks
;
4127 last_overlay_modification_hooks
4128 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
4129 bcopy (XVECTOR (old
)->contents
,
4130 XVECTOR (last_overlay_modification_hooks
)->contents
,
4131 sizeof (Lisp_Object
) * oldsize
);
4133 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = functionlist
;
4134 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = overlay
;
4137 /* Run the modification-hooks of overlays that include
4138 any part of the text in START to END.
4139 If this change is an insertion, also
4140 run the insert-before-hooks of overlay starting at END,
4141 and the insert-after-hooks of overlay ending at START.
4143 This is called both before and after the modification.
4144 AFTER is nonzero when we call after the modification.
4146 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4147 When AFTER is nonzero, they are the start position,
4148 the position after the inserted new text,
4149 and the length of deleted or replaced old text. */
4152 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4153 Lisp_Object start
, end
;
4155 Lisp_Object arg1
, arg2
, arg3
;
4157 Lisp_Object prop
, overlay
;
4158 struct Lisp_Overlay
*tail
;
4159 /* 1 if this change is an insertion. */
4160 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4161 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4166 /* We used to run the functions as soon as we found them and only register
4167 them in last_overlay_modification_hooks for the purpose of the `after'
4168 case. But running elisp code as we traverse the list of overlays is
4169 painful because the list can be modified by the elisp code so we had to
4170 copy at several places. We now simply do a read-only traversal that
4171 only collects the functions to run and we run them afterwards. It's
4172 simpler, especially since all the code was already there. -stef */
4176 /* We are being called before a change.
4177 Scan the overlays to find the functions to call. */
4178 last_overlay_modification_hooks_used
= 0;
4179 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4181 int startpos
, endpos
;
4182 Lisp_Object ostart
, oend
;
4184 XSETMISC (overlay
, tail
);
4186 ostart
= OVERLAY_START (overlay
);
4187 oend
= OVERLAY_END (overlay
);
4188 endpos
= OVERLAY_POSITION (oend
);
4189 if (XFASTINT (start
) > endpos
)
4191 startpos
= OVERLAY_POSITION (ostart
);
4192 if (insertion
&& (XFASTINT (start
) == startpos
4193 || XFASTINT (end
) == startpos
))
4195 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4197 add_overlay_mod_hooklist (prop
, overlay
);
4199 if (insertion
&& (XFASTINT (start
) == endpos
4200 || XFASTINT (end
) == endpos
))
4202 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4204 add_overlay_mod_hooklist (prop
, overlay
);
4206 /* Test for intersecting intervals. This does the right thing
4207 for both insertion and deletion. */
4208 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4210 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4212 add_overlay_mod_hooklist (prop
, overlay
);
4216 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4218 int startpos
, endpos
;
4219 Lisp_Object ostart
, oend
;
4221 XSETMISC (overlay
, tail
);
4223 ostart
= OVERLAY_START (overlay
);
4224 oend
= OVERLAY_END (overlay
);
4225 startpos
= OVERLAY_POSITION (ostart
);
4226 endpos
= OVERLAY_POSITION (oend
);
4227 if (XFASTINT (end
) < startpos
)
4229 if (insertion
&& (XFASTINT (start
) == startpos
4230 || XFASTINT (end
) == startpos
))
4232 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4234 add_overlay_mod_hooklist (prop
, overlay
);
4236 if (insertion
&& (XFASTINT (start
) == endpos
4237 || XFASTINT (end
) == endpos
))
4239 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4241 add_overlay_mod_hooklist (prop
, overlay
);
4243 /* Test for intersecting intervals. This does the right thing
4244 for both insertion and deletion. */
4245 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4247 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4249 add_overlay_mod_hooklist (prop
, overlay
);
4254 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4256 /* Call the functions recorded in last_overlay_modification_hooks.
4257 First copy the vector contents, in case some of these hooks
4258 do subsequent modification of the buffer. */
4259 int size
= last_overlay_modification_hooks_used
;
4260 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4263 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4264 copy
, size
* sizeof (Lisp_Object
));
4266 gcpro1
.nvars
= size
;
4268 for (i
= 0; i
< size
;)
4270 Lisp_Object prop
, overlay
;
4272 overlay
= copy
[i
++];
4273 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4280 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4281 Lisp_Object list
, overlay
;
4283 Lisp_Object arg1
, arg2
, arg3
;
4285 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4287 GCPRO4 (list
, arg1
, arg2
, arg3
);
4289 while (CONSP (list
))
4292 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4294 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4300 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4303 evaporate_overlays (pos
)
4306 Lisp_Object overlay
, hit_list
;
4307 struct Lisp_Overlay
*tail
;
4310 if (pos
<= current_buffer
->overlay_center
)
4311 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4314 XSETMISC (overlay
, tail
);
4315 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4318 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4319 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4320 hit_list
= Fcons (overlay
, hit_list
);
4323 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4326 XSETMISC (overlay
, tail
);
4327 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4330 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4331 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4332 hit_list
= Fcons (overlay
, hit_list
);
4334 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4335 Fdelete_overlay (XCAR (hit_list
));
4338 /* Somebody has tried to store a value with an unacceptable type
4339 in the slot with offset OFFSET. */
4342 buffer_slot_type_mismatch (offset
)
4348 switch (XINT (PER_BUFFER_TYPE (offset
)))
4351 type_name
= "integers";
4355 type_name
= "strings";
4359 type_name
= "symbols";
4366 sym
= PER_BUFFER_SYMBOL (offset
);
4367 error ("Only %s should be stored in the buffer-local variable %s",
4368 type_name
, SDATA (SYMBOL_NAME (sym
)));
4372 /***********************************************************************
4373 Allocation with mmap
4374 ***********************************************************************/
4376 #ifdef USE_MMAP_FOR_BUFFERS
4378 #include <sys/types.h>
4379 #include <sys/mman.h>
4382 #ifdef MAP_ANONYMOUS
4383 #define MAP_ANON MAP_ANONYMOUS
4390 #define MAP_FAILED ((void *) -1)
4403 /* Memory is allocated in regions which are mapped using mmap(2).
4404 The current implementation lets the system select mapped
4405 addresses; we're not using MAP_FIXED in general, except when
4406 trying to enlarge regions.
4408 Each mapped region starts with a mmap_region structure, the user
4409 area starts after that structure, aligned to MEM_ALIGN.
4411 +-----------------------+
4412 | struct mmap_info + |
4414 +-----------------------+
4418 +-----------------------+ */
4422 /* User-specified size. */
4423 size_t nbytes_specified
;
4425 /* Number of bytes mapped */
4426 size_t nbytes_mapped
;
4428 /* Pointer to the location holding the address of the memory
4429 allocated with the mmap'd block. The variable actually points
4430 after this structure. */
4433 /* Next and previous in list of all mmap'd regions. */
4434 struct mmap_region
*next
, *prev
;
4437 /* Doubly-linked list of mmap'd regions. */
4439 static struct mmap_region
*mmap_regions
;
4441 /* File descriptor for mmap. If we don't have anonymous mapping,
4442 /dev/zero will be opened on it. */
4446 /* Temporary storage for mmap_set_vars, see there. */
4448 static struct mmap_region
*mmap_regions_1
;
4449 static int mmap_fd_1
;
4451 /* Page size on this system. */
4453 static int mmap_page_size
;
4455 /* 1 means mmap has been intialized. */
4457 static int mmap_initialized_p
;
4459 /* Value is X rounded up to the next multiple of N. */
4461 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4463 /* Size of mmap_region structure plus padding. */
4465 #define MMAP_REGION_STRUCT_SIZE \
4466 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4468 /* Given a pointer P to the start of the user-visible part of a mapped
4469 region, return a pointer to the start of the region. */
4471 #define MMAP_REGION(P) \
4472 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4474 /* Given a pointer P to the start of a mapped region, return a pointer
4475 to the start of the user-visible part of the region. */
4477 #define MMAP_USER_AREA(P) \
4478 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4480 #define MEM_ALIGN sizeof (double)
4482 /* Predicate returning true if part of the address range [START .. END]
4483 is currently mapped. Used to prevent overwriting an existing
4486 Default is to conservativly assume the address range is occupied by
4487 something else. This can be overridden by system configuration
4488 files if system-specific means to determine this exists. */
4490 #ifndef MMAP_ALLOCATED_P
4491 #define MMAP_ALLOCATED_P(start, end) 1
4494 /* Function prototypes. */
4496 static int mmap_free_1
P_ ((struct mmap_region
*));
4497 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4498 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4499 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4500 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4501 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4502 static void mmap_init
P_ ((void));
4505 /* Return a region overlapping address range START...END, or null if
4506 none. END is not including, i.e. the last byte in the range
4509 static struct mmap_region
*
4510 mmap_find (start
, end
)
4511 POINTER_TYPE
*start
, *end
;
4513 struct mmap_region
*r
;
4514 char *s
= (char *) start
, *e
= (char *) end
;
4516 for (r
= mmap_regions
; r
; r
= r
->next
)
4518 char *rstart
= (char *) r
;
4519 char *rend
= rstart
+ r
->nbytes_mapped
;
4521 if (/* First byte of range, i.e. START, in this region? */
4522 (s
>= rstart
&& s
< rend
)
4523 /* Last byte of range, i.e. END - 1, in this region? */
4524 || (e
> rstart
&& e
<= rend
)
4525 /* First byte of this region in the range? */
4526 || (rstart
>= s
&& rstart
< e
)
4527 /* Last byte of this region in the range? */
4528 || (rend
> s
&& rend
<= e
))
4536 /* Unmap a region. P is a pointer to the start of the user-araa of
4537 the region. Value is non-zero if successful. */
4541 struct mmap_region
*r
;
4544 r
->next
->prev
= r
->prev
;
4546 r
->prev
->next
= r
->next
;
4548 mmap_regions
= r
->next
;
4550 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4552 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4560 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4561 Value is non-zero if successful. */
4564 mmap_enlarge (r
, npages
)
4565 struct mmap_region
*r
;
4568 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4574 /* Unmap pages at the end of the region. */
4575 nbytes
= - npages
* mmap_page_size
;
4576 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4577 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4580 r
->nbytes_mapped
-= nbytes
;
4584 else if (npages
> 0)
4586 nbytes
= npages
* mmap_page_size
;
4588 /* Try to map additional pages at the end of the region. We
4589 cannot do this if the address range is already occupied by
4590 something else because mmap deletes any previous mapping.
4591 I'm not sure this is worth doing, let's see. */
4592 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4596 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4597 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4598 if (p
== MAP_FAILED
)
4599 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4600 else if (p
!= (POINTER_TYPE
*) region_end
)
4602 /* Kernels are free to choose a different address. In
4603 that case, unmap what we've mapped above; we have
4605 if (munmap (p
, nbytes
) == -1)
4606 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4610 r
->nbytes_mapped
+= nbytes
;
4620 /* Set or reset variables holding references to mapped regions. If
4621 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4622 non-zero, set all variables to the start of the user-areas
4625 This function is called from Fdump_emacs to ensure that the dumped
4626 Emacs doesn't contain references to memory that won't be mapped
4627 when Emacs starts. */
4630 mmap_set_vars (restore_p
)
4633 struct mmap_region
*r
;
4637 mmap_regions
= mmap_regions_1
;
4638 mmap_fd
= mmap_fd_1
;
4639 for (r
= mmap_regions
; r
; r
= r
->next
)
4640 *r
->var
= MMAP_USER_AREA (r
);
4644 for (r
= mmap_regions
; r
; r
= r
->next
)
4646 mmap_regions_1
= mmap_regions
;
4647 mmap_regions
= NULL
;
4648 mmap_fd_1
= mmap_fd
;
4654 /* Allocate a block of storage large enough to hold NBYTES bytes of
4655 data. A pointer to the data is returned in *VAR. VAR is thus the
4656 address of some variable which will use the data area.
4658 The allocation of 0 bytes is valid.
4660 If we can't allocate the necessary memory, set *VAR to null, and
4663 static POINTER_TYPE
*
4664 mmap_alloc (var
, nbytes
)
4673 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4674 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4677 if (p
== MAP_FAILED
)
4679 if (errno
!= ENOMEM
)
4680 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4685 struct mmap_region
*r
= (struct mmap_region
*) p
;
4687 r
->nbytes_specified
= nbytes
;
4688 r
->nbytes_mapped
= map
;
4691 r
->next
= mmap_regions
;
4696 p
= MMAP_USER_AREA (p
);
4703 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4704 resize it to size NBYTES. Change *VAR to reflect the new block,
4705 and return this value. If more memory cannot be allocated, then
4706 leave *VAR unchanged, and return null. */
4708 static POINTER_TYPE
*
4709 mmap_realloc (var
, nbytes
)
4713 POINTER_TYPE
*result
;
4718 result
= mmap_alloc (var
, nbytes
);
4719 else if (nbytes
== 0)
4722 result
= mmap_alloc (var
, nbytes
);
4726 struct mmap_region
*r
= MMAP_REGION (*var
);
4727 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4732 POINTER_TYPE
*old_ptr
= *var
;
4734 /* Try to map additional pages at the end of the region.
4735 If that fails, allocate a new region, copy data
4736 from the old region, then free it. */
4737 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4740 r
->nbytes_specified
= nbytes
;
4741 *var
= result
= old_ptr
;
4743 else if (mmap_alloc (var
, nbytes
))
4745 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4746 mmap_free_1 (MMAP_REGION (old_ptr
));
4748 r
= MMAP_REGION (result
);
4749 r
->nbytes_specified
= nbytes
;
4757 else if (room
- nbytes
>= mmap_page_size
)
4759 /* Shrinking by at least a page. Let's give some
4760 memory back to the system.
4762 The extra parens are to make the division happens first,
4763 on positive values, so we know it will round towards
4765 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4767 r
->nbytes_specified
= nbytes
;
4771 /* Leave it alone. */
4773 r
->nbytes_specified
= nbytes
;
4781 /* Free a block of relocatable storage whose data is pointed to by
4782 PTR. Store 0 in *PTR to show there's no block allocated. */
4792 mmap_free_1 (MMAP_REGION (*var
));
4798 /* Perform necessary intializations for the use of mmap. */
4804 /* The value of mmap_fd is initially 0 in temacs, and -1
4805 in a dumped Emacs. */
4808 /* No anonymous mmap -- we need the file descriptor. */
4809 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4811 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4813 #endif /* MAP_ANON == 0 */
4815 if (mmap_initialized_p
)
4817 mmap_initialized_p
= 1;
4823 mmap_page_size
= getpagesize ();
4826 #endif /* USE_MMAP_FOR_BUFFERS */
4830 /***********************************************************************
4831 Buffer-text Allocation
4832 ***********************************************************************/
4835 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4836 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4837 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4838 #endif /* REL_ALLOC */
4841 /* Allocate NBYTES bytes for buffer B's text buffer. */
4844 alloc_buffer_text (b
, nbytes
)
4851 #if defined USE_MMAP_FOR_BUFFERS
4852 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4853 #elif defined REL_ALLOC
4854 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4856 p
= xmalloc (nbytes
);
4865 b
->text
->beg
= (unsigned char *) p
;
4869 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4873 enlarge_buffer_text (b
, delta
)
4878 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4881 #if defined USE_MMAP_FOR_BUFFERS
4882 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4883 #elif defined REL_ALLOC
4884 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4886 p
= xrealloc (b
->text
->beg
, nbytes
);
4895 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4900 /* Free buffer B's text buffer. */
4903 free_buffer_text (b
)
4908 #if defined USE_MMAP_FOR_BUFFERS
4909 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4910 #elif defined REL_ALLOC
4911 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4913 xfree (b
->text
->beg
);
4916 BUF_BEG_ADDR (b
) = NULL
;
4922 /***********************************************************************
4924 ***********************************************************************/
4931 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4933 /* Make sure all markable slots in buffer_defaults
4934 are initialized reasonably, so mark_buffer won't choke. */
4935 reset_buffer (&buffer_defaults
);
4936 reset_buffer_local_variables (&buffer_defaults
, 1);
4937 reset_buffer (&buffer_local_symbols
);
4938 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4939 /* Prevent GC from getting confused. */
4940 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4941 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4942 BUF_INTERVALS (&buffer_defaults
) = 0;
4943 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4944 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4945 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4947 /* Set up the default values of various buffer slots. */
4948 /* Must do these before making the first buffer! */
4950 /* real setup is done in bindings.el */
4951 buffer_defaults
.mode_line_format
= build_string ("%-");
4952 buffer_defaults
.header_line_format
= Qnil
;
4953 buffer_defaults
.abbrev_mode
= Qnil
;
4954 buffer_defaults
.overwrite_mode
= Qnil
;
4955 buffer_defaults
.case_fold_search
= Qt
;
4956 buffer_defaults
.auto_fill_function
= Qnil
;
4957 buffer_defaults
.selective_display
= Qnil
;
4959 buffer_defaults
.selective_display_ellipses
= Qt
;
4961 buffer_defaults
.abbrev_table
= Qnil
;
4962 buffer_defaults
.display_table
= Qnil
;
4963 buffer_defaults
.undo_list
= Qnil
;
4964 buffer_defaults
.mark_active
= Qnil
;
4965 buffer_defaults
.file_format
= Qnil
;
4966 buffer_defaults
.auto_save_file_format
= Qt
;
4967 buffer_defaults
.overlays_before
= NULL
;
4968 buffer_defaults
.overlays_after
= NULL
;
4969 buffer_defaults
.overlay_center
= BEG
;
4971 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4972 buffer_defaults
.truncate_lines
= Qnil
;
4973 buffer_defaults
.ctl_arrow
= Qt
;
4974 buffer_defaults
.direction_reversed
= Qnil
;
4975 buffer_defaults
.cursor_type
= Qt
;
4976 buffer_defaults
.extra_line_spacing
= Qnil
;
4979 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4981 buffer_defaults
.enable_multibyte_characters
= Qt
;
4982 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4983 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4984 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4985 buffer_defaults
.cache_long_line_scans
= Qnil
;
4986 buffer_defaults
.file_truename
= Qnil
;
4987 XSETFASTINT (buffer_defaults
.display_count
, 0);
4988 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
4989 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
4990 buffer_defaults
.left_fringe_width
= Qnil
;
4991 buffer_defaults
.right_fringe_width
= Qnil
;
4992 buffer_defaults
.fringes_outside_margins
= Qnil
;
4993 buffer_defaults
.scroll_bar_width
= Qnil
;
4994 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
4995 buffer_defaults
.indicate_empty_lines
= Qnil
;
4996 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
4997 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4998 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4999 buffer_defaults
.display_time
= Qnil
;
5001 /* Assign the local-flags to the slots that have default values.
5002 The local flag is a bit that is used in the buffer
5003 to say that it has its own local value for the slot.
5004 The local flag bits are in the local_var_flags slot of the buffer. */
5006 /* Nothing can work if this isn't true */
5007 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
5009 /* 0 means not a lisp var, -1 means always local, else mask */
5010 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
5011 XSETINT (buffer_local_flags
.filename
, -1);
5012 XSETINT (buffer_local_flags
.directory
, -1);
5013 XSETINT (buffer_local_flags
.backed_up
, -1);
5014 XSETINT (buffer_local_flags
.save_length
, -1);
5015 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
5016 XSETINT (buffer_local_flags
.read_only
, -1);
5017 XSETINT (buffer_local_flags
.major_mode
, -1);
5018 XSETINT (buffer_local_flags
.mode_name
, -1);
5019 XSETINT (buffer_local_flags
.undo_list
, -1);
5020 XSETINT (buffer_local_flags
.mark_active
, -1);
5021 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
5022 XSETINT (buffer_local_flags
.file_truename
, -1);
5023 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
5024 XSETINT (buffer_local_flags
.file_format
, -1);
5025 XSETINT (buffer_local_flags
.auto_save_file_format
, -1);
5026 XSETINT (buffer_local_flags
.display_count
, -1);
5027 XSETINT (buffer_local_flags
.display_time
, -1);
5028 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
5031 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
5032 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
5033 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5034 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5035 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5036 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5038 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5040 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5041 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5042 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5043 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5044 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5045 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5046 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5048 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5049 /* Make this one a permanent local. */
5050 buffer_permanent_local_flags
[idx
++] = 1;
5052 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5053 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5054 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5055 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
5056 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5057 /* Make this one a permanent local. */
5058 buffer_permanent_local_flags
[idx
++] = 1;
5059 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5060 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5061 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5062 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5063 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5064 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5065 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5066 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5067 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5068 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5069 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5070 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5071 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5072 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5074 /* Need more room? */
5075 if (idx
>= MAX_PER_BUFFER_VARS
)
5077 last_per_buffer_idx
= idx
;
5079 Vbuffer_alist
= Qnil
;
5083 QSFundamental
= build_string ("Fundamental");
5085 Qfundamental_mode
= intern ("fundamental-mode");
5086 buffer_defaults
.major_mode
= Qfundamental_mode
;
5088 Qmode_class
= intern ("mode-class");
5090 Qprotected_field
= intern ("protected-field");
5092 Qpermanent_local
= intern ("permanent-local");
5094 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5095 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5097 Qucs_set_table_for_input
= intern ("ucs-set-table-for-input");
5099 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
5101 /* super-magic invisible buffer */
5102 Vbuffer_alist
= Qnil
;
5104 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5106 inhibit_modification_hooks
= 0;
5112 char buf
[MAXPATHLEN
+ 1];
5114 struct stat dotstat
, pwdstat
;
5118 #ifdef USE_MMAP_FOR_BUFFERS
5120 /* When using the ralloc implementation based on mmap(2), buffer
5121 text pointers will have been set to null in the dumped Emacs.
5125 for (b
= all_buffers
; b
; b
= b
->next
)
5126 if (b
->text
->beg
== NULL
)
5127 enlarge_buffer_text (b
, 0);
5129 #endif /* USE_MMAP_FOR_BUFFERS */
5131 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5132 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5133 Fset_buffer_multibyte (Qnil
);
5135 /* If PWD is accurate, use it instead of calling getwd. PWD is
5136 sometimes a nicer name, and using it may avoid a fatal error if a
5137 parent directory is searchable but not readable. */
5138 if ((pwd
= getenv ("PWD")) != 0
5139 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
5140 && stat (pwd
, &pwdstat
) == 0
5141 && stat (".", &dotstat
) == 0
5142 && dotstat
.st_ino
== pwdstat
.st_ino
5143 && dotstat
.st_dev
== pwdstat
.st_dev
5144 && strlen (pwd
) < MAXPATHLEN
)
5147 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
5148 fatal ("`getcwd' failed: %s\n", strerror (errno
));
5150 else if (getwd (buf
) == 0)
5151 fatal ("`getwd' failed: %s\n", buf
);
5155 /* Maybe this should really use some standard subroutine
5156 whose definition is filename syntax dependent. */
5158 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
5160 buf
[rc
] = DIRECTORY_SEP
;
5163 #endif /* not VMS */
5165 current_buffer
->directory
= make_unibyte_string (buf
, strlen (buf
));
5166 if (! NILP (buffer_defaults
.enable_multibyte_characters
))
5167 /* At this momemnt, we still don't know how to decode the
5168 direcotry name. So, we keep the bytes in multibyte form so
5169 that ENCODE_FILE correctly gets the original bytes. */
5170 current_buffer
->directory
5171 = string_to_multibyte (current_buffer
->directory
);
5173 /* Add /: to the front of the name
5174 if it would otherwise be treated as magic. */
5175 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5177 /* If the default dir is just /, TEMP is non-nil
5178 because of the ange-ftp completion handler.
5179 However, it is not necessary to turn / into /:/.
5180 So avoid doing that. */
5181 && strcmp ("/", SDATA (current_buffer
->directory
)))
5182 current_buffer
->directory
5183 = concat2 (build_string ("/:"), current_buffer
->directory
);
5185 temp
= get_minibuffer (0);
5186 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5189 /* initialize the buffer routines */
5193 staticpro (&last_overlay_modification_hooks
);
5194 last_overlay_modification_hooks
5195 = Fmake_vector (make_number (10), Qnil
);
5197 staticpro (&Vbuffer_defaults
);
5198 staticpro (&Vbuffer_local_symbols
);
5199 staticpro (&Qfundamental_mode
);
5200 staticpro (&Qmode_class
);
5201 staticpro (&QSFundamental
);
5202 staticpro (&Vbuffer_alist
);
5203 staticpro (&Qprotected_field
);
5204 staticpro (&Qpermanent_local
);
5205 staticpro (&Qkill_buffer_hook
);
5206 Qoverlayp
= intern ("overlayp");
5207 staticpro (&Qoverlayp
);
5208 Qevaporate
= intern ("evaporate");
5209 staticpro (&Qevaporate
);
5210 Qmodification_hooks
= intern ("modification-hooks");
5211 staticpro (&Qmodification_hooks
);
5212 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5213 staticpro (&Qinsert_in_front_hooks
);
5214 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5215 staticpro (&Qinsert_behind_hooks
);
5216 Qget_file_buffer
= intern ("get-file-buffer");
5217 staticpro (&Qget_file_buffer
);
5218 Qpriority
= intern ("priority");
5219 staticpro (&Qpriority
);
5220 Qwindow
= intern ("window");
5221 staticpro (&Qwindow
);
5222 Qbefore_string
= intern ("before-string");
5223 staticpro (&Qbefore_string
);
5224 Qafter_string
= intern ("after-string");
5225 staticpro (&Qafter_string
);
5226 Qfirst_change_hook
= intern ("first-change-hook");
5227 staticpro (&Qfirst_change_hook
);
5228 Qbefore_change_functions
= intern ("before-change-functions");
5229 staticpro (&Qbefore_change_functions
);
5230 Qafter_change_functions
= intern ("after-change-functions");
5231 staticpro (&Qafter_change_functions
);
5232 staticpro (&Qucs_set_table_for_input
);
5234 Qkill_buffer_query_functions
= intern ("kill-buffer-query-functions");
5235 staticpro (&Qkill_buffer_query_functions
);
5237 Fput (Qprotected_field
, Qerror_conditions
,
5238 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5239 Fput (Qprotected_field
, Qerror_message
,
5240 build_string ("Attempt to modify a protected field"));
5242 /* All these use DEFVAR_LISP_NOPRO because the slots in
5243 buffer_defaults will all be marked via Vbuffer_defaults. */
5245 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5246 &buffer_defaults
.mode_line_format
,
5247 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5248 This is the same as (default-value 'mode-line-format). */);
5250 DEFVAR_LISP_NOPRO ("default-header-line-format",
5251 &buffer_defaults
.header_line_format
,
5252 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5253 This is the same as (default-value 'header-line-format). */);
5255 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5256 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5257 This is the same as (default-value 'cursor-type). */);
5259 DEFVAR_LISP_NOPRO ("default-line-spacing",
5260 &buffer_defaults
.extra_line_spacing
,
5261 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5262 This is the same as (default-value 'line-spacing). */);
5264 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5265 &buffer_defaults
.abbrev_mode
,
5266 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5267 This is the same as (default-value 'abbrev-mode). */);
5269 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5270 &buffer_defaults
.ctl_arrow
,
5271 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5272 This is the same as (default-value 'ctl-arrow). */);
5274 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5275 &buffer_defaults
.direction_reversed
,
5276 doc
: /* Default value of `direction-reversed' for buffers that do not override it.
5277 This is the same as (default-value 'direction-reversed). */);
5279 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5280 &buffer_defaults
.enable_multibyte_characters
,
5281 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5282 This is the same as (default-value 'enable-multibyte-characters). */);
5284 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5285 &buffer_defaults
.buffer_file_coding_system
,
5286 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5287 This is the same as (default-value 'buffer-file-coding-system). */);
5289 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5290 &buffer_defaults
.truncate_lines
,
5291 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5292 This is the same as (default-value 'truncate-lines). */);
5294 DEFVAR_LISP_NOPRO ("default-fill-column",
5295 &buffer_defaults
.fill_column
,
5296 doc
: /* Default value of `fill-column' for buffers that do not override it.
5297 This is the same as (default-value 'fill-column). */);
5299 DEFVAR_LISP_NOPRO ("default-left-margin",
5300 &buffer_defaults
.left_margin
,
5301 doc
: /* Default value of `left-margin' for buffers that do not override it.
5302 This is the same as (default-value 'left-margin). */);
5304 DEFVAR_LISP_NOPRO ("default-tab-width",
5305 &buffer_defaults
.tab_width
,
5306 doc
: /* Default value of `tab-width' for buffers that do not override it.
5307 This is the same as (default-value 'tab-width). */);
5309 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5310 &buffer_defaults
.case_fold_search
,
5311 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5312 This is the same as (default-value 'case-fold-search). */);
5315 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5316 &buffer_defaults
.buffer_file_type
,
5317 doc
: /* Default file type for buffers that do not override it.
5318 This is the same as (default-value 'buffer-file-type).
5319 The file type is nil for text, t for binary. */);
5322 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5323 &buffer_defaults
.left_margin_cols
,
5324 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5325 This is the same as (default-value 'left-margin-width). */);
5327 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5328 &buffer_defaults
.right_margin_cols
,
5329 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5330 This is the same as (default-value 'right-margin-width). */);
5332 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5333 &buffer_defaults
.left_fringe_width
,
5334 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5335 This is the same as (default-value 'left-fringe-width). */);
5337 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5338 &buffer_defaults
.right_fringe_width
,
5339 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5340 This is the same as (default-value 'right-fringe-width). */);
5342 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5343 &buffer_defaults
.fringes_outside_margins
,
5344 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5345 This is the same as (default-value 'fringes-outside-margins). */);
5347 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5348 &buffer_defaults
.scroll_bar_width
,
5349 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5350 This is the same as (default-value 'scroll-bar-width). */);
5352 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5353 &buffer_defaults
.vertical_scroll_bar_type
,
5354 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5355 This is the same as (default-value 'vertical-scroll-bar). */);
5357 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5358 &buffer_defaults
.indicate_empty_lines
,
5359 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5360 This is the same as (default-value 'indicate-empty-lines). */);
5362 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5363 &buffer_defaults
.indicate_buffer_boundaries
,
5364 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5365 This is the same as (default-value 'indicate-buffer-boundaries). */);
5367 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5368 &buffer_defaults
.scroll_up_aggressively
,
5369 doc
: /* Default value of `scroll-up-aggressively'.
5370 This value applies in buffers that don't have their own local values.
5371 This variable is an alias for (default-value 'scroll-up-aggressively). */);
5373 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5374 &buffer_defaults
.scroll_down_aggressively
,
5375 doc
: /* Default value of `scroll-down-aggressively'.
5376 This value applies in buffers that don't have their own local values.
5377 This variable is an alias for (default-value 'scroll-down-aggressively). */);
5379 DEFVAR_PER_BUFFER ("header-line-format",
5380 ¤t_buffer
->header_line_format
,
5382 doc
: /* Analogous to `mode-line-format', but controls the header line.
5383 The header line appears, optionally, at the top of a window;
5384 the mode line appears at the bottom. */);
5386 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5388 doc
: /* Template for displaying mode line for current buffer.
5389 Each buffer has its own value of this variable.
5390 Value may be nil, a string, a symbol or a list or cons cell.
5391 A value of nil means don't display a mode line.
5392 For a symbol, its value is used (but it is ignored if t or nil).
5393 A string appearing directly as the value of a symbol is processed verbatim
5394 in that the %-constructs below are not recognized.
5395 Note that unless the symbol is marked as a `risky-local-variable', all
5396 properties in any strings, as well as all :eval and :propertize forms
5397 in the value of that symbol will be ignored.
5398 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5399 is used as a mode line element. Be careful--FORM should not load any files,
5400 because that can cause an infinite recursion.
5401 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5402 with the specified properties PROPS applied.
5403 For a list whose car is a symbol, the symbol's value is taken,
5404 and if that is non-nil, the cadr of the list is processed recursively.
5405 Otherwise, the caddr of the list (if there is one) is processed.
5406 For a list whose car is a string or list, each element is processed
5407 recursively and the results are effectively concatenated.
5408 For a list whose car is an integer, the cdr of the list is processed
5409 and padded (if the number is positive) or truncated (if negative)
5410 to the width specified by that number.
5411 A string is printed verbatim in the mode line except for %-constructs:
5412 (%-constructs are allowed when the string is the entire mode-line-format
5413 or when it is found in a cons-cell or a list)
5414 %b -- print buffer name. %f -- print visited file name.
5415 %F -- print frame name.
5416 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5417 %& is like %*, but ignore read-only-ness.
5418 % means buffer is read-only and * means it is modified.
5419 For a modified read-only buffer, %* gives % and %+ gives *.
5420 %s -- print process status. %l -- print the current line number.
5421 %c -- print the current column number (this makes editing slower).
5422 To make the column number update correctly in all cases,
5423 `column-number-mode' must be non-nil.
5424 %i -- print the size of the buffer.
5425 %I -- like %i, but use k, M, G, etc., to abbreviate.
5426 %p -- print percent of buffer above top of window, or Top, Bot or All.
5427 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5428 or print Bottom or All.
5429 %m -- print the mode name.
5430 %n -- print Narrow if appropriate.
5431 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5432 %Z -- like %z, but including the end-of-line format.
5433 %[ -- print one [ for each recursive editing level. %] similar.
5434 %% -- print %. %- -- print infinitely many dashes.
5435 Decimal digits after the % specify field width to which to pad. */);
5437 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5438 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5439 nil here means use current buffer's major mode, provided it is not
5440 marked as "special".
5442 When a mode is used by default, `find-file' switches to it
5443 before it reads the contents into the buffer and before
5444 it finishes setting up the buffer. Thus, the mode and
5445 its hooks should not expect certain variables such as
5446 `buffer-read-only' and `buffer-file-coding-system' to be set up. */);
5448 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5449 make_number (Lisp_Symbol
),
5450 doc
: /* Symbol for current buffer's major mode. */);
5452 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5454 doc
: /* Pretty name of current buffer's major mode (a string). */);
5456 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5457 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5459 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5461 doc
: /* *Non-nil if searches and matches should ignore case. */);
5463 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5464 make_number (Lisp_Int
),
5465 doc
: /* *Column beyond which automatic line-wrapping should happen.
5466 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5468 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5469 make_number (Lisp_Int
),
5470 doc
: /* *Column for the default indent-line-function to indent to.
5471 Linefeed indents to this column in Fundamental mode. */);
5473 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5474 make_number (Lisp_Int
),
5475 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5477 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5478 doc
: /* *Non-nil means display control chars with uparrow.
5479 A value of nil means use backslash and octal digits.
5480 This variable does not apply to characters whose display is specified
5481 in the current display table (if there is one). */);
5483 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5484 ¤t_buffer
->enable_multibyte_characters
,
5486 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5487 Otherwise they are regarded as unibyte. This affects the display,
5488 file I/O and the behavior of various editing commands.
5490 This variable is buffer-local but you cannot set it directly;
5491 use the function `set-buffer-multibyte' to change a buffer's representation.
5492 Changing its default value with `setq-default' is supported.
5493 See also variable `default-enable-multibyte-characters' and Info node
5494 `(elisp)Text Representations'. */);
5495 XSYMBOL (intern ("enable-multibyte-characters"))->constant
= 1;
5497 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5498 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5499 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5500 This variable applies to saving the buffer, and also to `write-region'
5501 and other functions that use `write-region'.
5502 It does not apply to sending output to subprocesses, however.
5504 If this is nil, the buffer is saved without any code conversion
5505 unless some coding system is specified in `file-coding-system-alist'
5506 for the buffer file.
5508 If the text to be saved cannot be encoded as specified by this variable,
5509 an alternative encoding is selected by `select-safe-coding-system', which see.
5511 The variable `coding-system-for-write', if non-nil, overrides this variable.
5513 This variable is never applied to a way of decoding a file while reading it. */);
5515 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5517 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5519 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5520 doc
: /* *Non-nil means do not display continuation lines.
5521 Instead, give each line of text just one screen line.
5523 Note that this is overridden by the variable
5524 `truncate-partial-width-windows' if that variable is non-nil
5525 and this buffer is not full-frame width. */);
5528 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5530 doc
: /* Non-nil if the visited file is a binary file.
5531 This variable is meaningful on MS-DOG and Windows NT.
5532 On those systems, it is automatically local in every buffer.
5533 On other systems, this variable is normally always nil. */);
5536 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5537 make_number (Lisp_String
),
5538 doc
: /* Name of default directory of current buffer. Should end with slash.
5539 To interactively change the default directory, use command `cd'. */);
5541 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5543 doc
: /* Function called (if non-nil) to perform auto-fill.
5544 It is called after self-inserting any character specified in
5545 the `auto-fill-chars' table.
5546 NOTE: This variable is not a hook;
5547 its value may not be a list of functions. */);
5549 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5550 make_number (Lisp_String
),
5551 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5553 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5554 make_number (Lisp_String
),
5555 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5556 The truename of a file is calculated by `file-truename'
5557 and then abbreviated with `abbreviate-file-name'. */);
5559 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5560 ¤t_buffer
->auto_save_file_name
,
5561 make_number (Lisp_String
),
5562 doc
: /* Name of file for auto-saving current buffer.
5563 If it is nil, that means don't auto-save this buffer. */);
5565 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5566 doc
: /* Non-nil if this buffer is read-only. */);
5568 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5569 doc
: /* Non-nil if this buffer's file has been backed up.
5570 Backing up is done before the first time the file is saved. */);
5572 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5573 make_number (Lisp_Int
),
5574 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5577 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5579 doc
: /* Non-nil enables selective display.
5580 An Integer N as value means display only lines
5581 that start with less than n columns of space.
5582 A value of t means that the character ^M makes itself and
5583 all the rest of the line invisible; also, when saving the buffer
5584 in a file, save the ^M as a newline. */);
5587 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5588 ¤t_buffer
->selective_display_ellipses
,
5590 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5593 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5594 doc
: /* Non-nil if self-insertion should replace existing text.
5595 The value should be one of `overwrite-mode-textual',
5596 `overwrite-mode-binary', or nil.
5597 If it is `overwrite-mode-textual', self-insertion still
5598 inserts at the end of a line, and inserts when point is before a tab,
5599 until the tab is filled in.
5600 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5602 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5604 doc
: /* Display table that controls display of the contents of current buffer.
5606 If this variable is nil, the value of `standard-display-table' is used.
5607 Each window can have its own, overriding display table, see
5608 `set-window-display-table' and `window-display-table'.
5610 The display table is a char-table created with `make-display-table'.
5611 A char-table is an array indexed by character codes. Normal array
5612 primitives `aref' and `aset' can be used to access elements of a char-table.
5614 Each of the char-table elements control how to display the corresponding
5615 text character: the element at index C in the table says how to display
5616 the character whose code is C. Each element should be a vector of
5617 characters or nil. nil means display the character in the default fashion;
5618 otherwise, the characters from the vector are delivered to the screen
5619 instead of the original character.
5621 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5622 a capital Y instead of each X character.
5624 In addition, a char-table has six extra slots to control the display of:
5626 the end of a truncated screen line (extra-slot 0, a single character);
5627 the end of a continued line (extra-slot 1, a single character);
5628 the escape character used to display character codes in octal
5629 (extra-slot 2, a single character);
5630 the character used as an arrow for control characters (extra-slot 3,
5631 a single character);
5632 the decoration indicating the presence of invisible lines (extra-slot 4,
5633 a vector of characters);
5634 the character used to draw the border between side-by-side windows
5635 (extra-slot 5, a single character).
5637 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5639 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5641 doc
: /* *Width of left marginal area for display of a buffer.
5642 A value of nil means no marginal area. */);
5644 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5646 doc
: /* *Width of right marginal area for display of a buffer.
5647 A value of nil means no marginal area. */);
5649 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5651 doc
: /* *Width of this buffer's left fringe (in pixels).
5652 A value of 0 means no left fringe is shown in this buffer's window.
5653 A value of nil means to use the left fringe width from the window's frame. */);
5655 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5657 doc
: /* *Width of this buffer's right fringe (in pixels).
5658 A value of 0 means no right fringe is shown in this buffer's window.
5659 A value of nil means to use the right fringe width from the window's frame. */);
5661 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5663 doc
: /* *Non-nil means to display fringes outside display margins.
5664 A value of nil means to display fringes between margins and buffer text. */);
5666 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5668 doc
: /* *Width of this buffer's scroll bars in pixels.
5669 A value of nil means to use the scroll bar width from the window's frame. */);
5671 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5673 doc
: /* *Position of this buffer's vertical scroll bar.
5674 The value takes effect whenever you tell a window to display this buffer;
5675 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5677 A value of `left' or `right' means put the vertical scroll bar at that side
5678 of the window; a value of nil means don't show any vertical scroll bars.
5679 A value of t (the default) means do whatever the window's frame specifies. */);
5681 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5682 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5683 doc
: /* *Visually indicate empty lines after the buffer end.
5684 If non-nil, a bitmap is displayed in the left fringe of a window on
5685 window-systems. */);
5687 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5688 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
5689 doc
: /* *Visually indicate buffer boundaries and scrolling.
5690 If non-nil, the first and last line of the buffer are marked in the fringe
5691 of a window on window-systems with angle bitmaps, or if the window can be
5692 scrolled, the top and bottom line of the window are marked with up and down
5695 If value is a symbol `left' or `right', both angle and arrow bitmaps
5696 are displayed in the left or right fringe, resp. Any other value
5697 that doesn't look like an alist means display the angle bitmaps in
5698 the left fringe but no arrows.
5700 You can exercise more precise control by using an alist as the
5701 value. Each alist element (INDICATOR . POSITION) specifies
5702 where to show one of the indicators. INDICATOR is one of `top',
5703 `bottom', `up', `down', or t, which specifies the default position,
5704 and POSITION is one of `left', `right', or nil, meaning do not show
5707 For example, ((top . left) (t . right)) places the top angle bitmap in
5708 left fringe, the bottom angle bitmap in right fringe, and both arrow
5709 bitmaps in right fringe. To show just the angle bitmaps in the left
5710 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5712 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5713 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5714 doc
: /* How far to scroll windows upward.
5715 If you move point off the bottom, the window scrolls automatically.
5716 This variable controls how far it scrolls. nil, the default,
5717 means scroll to center point. A fraction means scroll to put point
5718 that fraction of the window's height from the bottom of the window.
5719 When the value is 0.0, point goes at the bottom line, which in the simple
5720 case that you moved off with C-f means scrolling just one line. 1.0 means
5721 point goes at the top, so that in that simple case, the window
5722 window scrolls by a full window height. Meaningful values are
5723 between 0.0 and 1.0, inclusive. */);
5725 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5726 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5727 doc
: /* How far to scroll windows downward.
5728 If you move point off the top, the window scrolls automatically.
5729 This variable controls how far it scrolls. nil, the default,
5730 means scroll to center point. A fraction means scroll to put point
5731 that fraction of the window's height from the top of the window.
5732 When the value is 0.0, point goes at the top line, which in the simple
5733 case that you moved off with C-b means scrolling just one line. 1.0 means
5734 point goes at the bottom, so that in that simple case, the window
5735 window scrolls by a full window height. Meaningful values are
5736 between 0.0 and 1.0, inclusive. */);
5738 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5742 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5743 doc
: /* List of functions to call before each text change.
5744 Two arguments are passed to each function: the positions of
5745 the beginning and end of the range of old text to be changed.
5746 \(For an insertion, the beginning and end are at the same place.)
5747 No information is given about the length of the text after the change.
5749 Buffer changes made while executing the `before-change-functions'
5750 don't call any before-change or after-change functions.
5751 That's because these variables are temporarily set to nil.
5752 As a result, a hook function cannot straightforwardly alter the value of
5753 these variables. See the Emacs Lisp manual for a way of
5754 accomplishing an equivalent result by using other variables.
5756 If an unhandled error happens in running these functions,
5757 the variable's value remains nil. That prevents the error
5758 from happening repeatedly and making Emacs nonfunctional. */);
5759 Vbefore_change_functions
= Qnil
;
5761 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5762 doc
: /* List of functions to call after each text change.
5763 Three arguments are passed to each function: the positions of
5764 the beginning and end of the range of changed text,
5765 and the length in bytes of the pre-change text replaced by that range.
5766 \(For an insertion, the pre-change length is zero;
5767 for a deletion, that length is the number of bytes deleted,
5768 and the post-change beginning and end are at the same place.)
5770 Buffer changes made while executing the `after-change-functions'
5771 don't call any before-change or after-change functions.
5772 That's because these variables are temporarily set to nil.
5773 As a result, a hook function cannot straightforwardly alter the value of
5774 these variables. See the Emacs Lisp manual for a way of
5775 accomplishing an equivalent result by using other variables.
5777 If an unhandled error happens in running these functions,
5778 the variable's value remains nil. That prevents the error
5779 from happening repeatedly and making Emacs nonfunctional. */);
5780 Vafter_change_functions
= Qnil
;
5782 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5783 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5784 The functions are run using the `run-hooks' function. */);
5785 Vfirst_change_hook
= Qnil
;
5787 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5788 doc
: /* List of undo entries in current buffer.
5789 Recent changes come first; older changes follow newer.
5791 An entry (BEG . END) represents an insertion which begins at
5792 position BEG and ends at position END.
5794 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5795 from (abs POSITION). If POSITION is positive, point was at the front
5796 of the text being deleted; if negative, point was at the end.
5798 An entry (t HIGH . LOW) indicates that the buffer previously had
5799 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5800 of the visited file's modification time, as of that time. If the
5801 modification time of the most recent save is different, this entry is
5804 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5805 was modified between BEG and END. PROPERTY is the property name,
5806 and VALUE is the old value.
5808 An entry (apply FUN-NAME . ARGS) means undo the change with
5809 \(apply FUN-NAME ARGS).
5811 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5812 in the active region. BEG and END is the range affected by this entry
5813 and DELTA is the number of bytes added or deleted in that range by
5816 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5817 was adjusted in position by the offset DISTANCE (an integer).
5819 An entry of the form POSITION indicates that point was at the buffer
5820 location given by the integer. Undoing an entry of this form places
5823 nil marks undo boundaries. The undo command treats the changes
5824 between two undo boundaries as a single step to be undone.
5826 If the value of the variable is t, undo information is not recorded. */);
5828 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5829 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5831 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5832 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5834 Normally, the line-motion functions work by scanning the buffer for
5835 newlines. Columnar operations (like `move-to-column' and
5836 `compute-motion') also work by scanning the buffer, summing character
5837 widths as they go. This works well for ordinary text, but if the
5838 buffer's lines are very long (say, more than 500 characters), these
5839 motion functions will take longer to execute. Emacs may also take
5840 longer to update the display.
5842 If `cache-long-line-scans' is non-nil, these motion functions cache the
5843 results of their scans, and consult the cache to avoid rescanning
5844 regions of the buffer until the text is modified. The caches are most
5845 beneficial when they prevent the most searching---that is, when the
5846 buffer contains long lines and large regions of characters with the
5847 same, fixed screen width.
5849 When `cache-long-line-scans' is non-nil, processing short lines will
5850 become slightly slower (because of the overhead of consulting the
5851 cache), and the caches will use memory roughly proportional to the
5852 number of newlines and characters whose screen width varies.
5854 The caches require no explicit maintenance; their accuracy is
5855 maintained internally by the Emacs primitives. Enabling or disabling
5856 the cache should not affect the behavior of any of the motion
5857 functions; it should only affect their performance. */);
5859 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5860 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5862 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5863 doc
: /* List of formats to use when saving this buffer.
5864 Formats are defined by `format-alist'. This variable is
5865 set when a file is visited. */);
5867 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5868 ¤t_buffer
->auto_save_file_format
, Qnil
,
5869 doc
: /* *Format in which to write auto-save files.
5870 Should be a list of symbols naming formats that are defined in `format-alist'.
5871 If it is t, which is the default, auto-save files are written in the
5872 same format as a regular save would use. */);
5874 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5875 ¤t_buffer
->invisibility_spec
, Qnil
,
5876 doc
: /* Invisibility spec of this buffer.
5877 The default is t, which means that text is invisible
5878 if it has a non-nil `invisible' property.
5879 If the value is a list, a text character is invisible if its `invisible'
5880 property is an element in that list.
5881 If an element is a cons cell of the form (PROP . ELLIPSIS),
5882 then characters with property value PROP are invisible,
5883 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5885 DEFVAR_PER_BUFFER ("buffer-display-count",
5886 ¤t_buffer
->display_count
, Qnil
,
5887 doc
: /* A number incremented each time this buffer is displayed in a window.
5888 The function `set-window-buffer' increments it. */);
5890 DEFVAR_PER_BUFFER ("buffer-display-time",
5891 ¤t_buffer
->display_time
, Qnil
,
5892 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5893 The function `set-window-buffer' updates this variable
5894 to the value obtained by calling `current-time'.
5895 If the buffer has never been shown in a window, the value is nil. */);
5897 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5898 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5899 Non-nil also enables highlighting of the region whenever the mark is active.
5900 The variable `highlight-nonselected-windows' controls whether to highlight
5901 all windows or just the selected window.
5903 If the value is `lambda', that enables Transient Mark mode temporarily
5904 until the next buffer modification. If a command sets the value to `only',
5905 that enables Transient Mark mode for the following command only.
5906 During that following command, the value of `transient-mark-mode'
5907 is `identity'. If it is still `identity' at the end of that command,
5908 it changes to nil. */);
5909 Vtransient_mark_mode
= Qnil
;
5911 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5912 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5913 If the value is t, disregard `buffer-read-only' and all `read-only'
5914 text properties. If the value is a list, disregard `buffer-read-only'
5915 and disregard a `read-only' text property if the property value
5916 is a member of the list. */);
5917 Vinhibit_read_only
= Qnil
;
5919 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5920 doc
: /* Cursor to use when this buffer is in the selected window.
5921 Values are interpreted as follows:
5923 t use the cursor specified for the frame
5924 nil don't display a cursor
5925 box display a filled box cursor
5926 hollow display a hollow box cursor
5927 bar display a vertical bar cursor with default width
5928 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5929 hbar display a horizontal bar cursor with default width
5930 (hbar . WIDTH) display a horizontal bar cursor with width WIDTH
5931 ANYTHING ELSE display a hollow box cursor.
5933 When the buffer is displayed in a nonselected window,
5934 this variable has no effect; the cursor appears as a hollow box. */);
5936 DEFVAR_PER_BUFFER ("line-spacing",
5937 ¤t_buffer
->extra_line_spacing
, Qnil
,
5938 doc
: /* Additional space to put between lines when displaying a buffer.
5939 The space is measured in pixels, and put below lines on window systems.
5940 If value is a floating point number, it specifies the spacing relative
5941 to the default frame line height. */);
5943 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5944 doc
: /* List of functions called with no args to query before killing a buffer. */);
5945 Vkill_buffer_query_functions
= Qnil
;
5947 defsubr (&Sbuffer_live_p
);
5948 defsubr (&Sbuffer_list
);
5949 defsubr (&Sget_buffer
);
5950 defsubr (&Sget_file_buffer
);
5951 defsubr (&Sget_buffer_create
);
5952 defsubr (&Smake_indirect_buffer
);
5953 defsubr (&Sgenerate_new_buffer_name
);
5954 defsubr (&Sbuffer_name
);
5955 /*defsubr (&Sbuffer_number);*/
5956 defsubr (&Sbuffer_file_name
);
5957 defsubr (&Sbuffer_base_buffer
);
5958 defsubr (&Sbuffer_local_value
);
5959 defsubr (&Sbuffer_local_variables
);
5960 defsubr (&Sbuffer_modified_p
);
5961 defsubr (&Sset_buffer_modified_p
);
5962 defsubr (&Sbuffer_modified_tick
);
5963 defsubr (&Srename_buffer
);
5964 defsubr (&Sother_buffer
);
5965 defsubr (&Sbuffer_enable_undo
);
5966 defsubr (&Skill_buffer
);
5967 defsubr (&Sset_buffer_major_mode
);
5968 defsubr (&Sswitch_to_buffer
);
5969 defsubr (&Spop_to_buffer
);
5970 defsubr (&Scurrent_buffer
);
5971 defsubr (&Sset_buffer
);
5972 defsubr (&Sbarf_if_buffer_read_only
);
5973 defsubr (&Sbury_buffer
);
5974 defsubr (&Serase_buffer
);
5975 defsubr (&Sset_buffer_multibyte
);
5976 defsubr (&Skill_all_local_variables
);
5978 defsubr (&Soverlayp
);
5979 defsubr (&Smake_overlay
);
5980 defsubr (&Sdelete_overlay
);
5981 defsubr (&Smove_overlay
);
5982 defsubr (&Soverlay_start
);
5983 defsubr (&Soverlay_end
);
5984 defsubr (&Soverlay_buffer
);
5985 defsubr (&Soverlay_properties
);
5986 defsubr (&Soverlays_at
);
5987 defsubr (&Soverlays_in
);
5988 defsubr (&Snext_overlay_change
);
5989 defsubr (&Sprevious_overlay_change
);
5990 defsubr (&Soverlay_recenter
);
5991 defsubr (&Soverlay_lists
);
5992 defsubr (&Soverlay_get
);
5993 defsubr (&Soverlay_put
);
5994 defsubr (&Srestore_buffer_modified_p
);
6000 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6001 initial_define_key (control_x_map
, 'k', "kill-buffer");
6003 /* This must not be in syms_of_buffer, because Qdisabled is not
6004 initialized when that function gets called. */
6005 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
6008 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
6009 (do not change this comment) */