1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, 1995, 1997, 1998
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include <sys/types.h>
25 #include <sys/param.h>
31 /* in 4.1, param.h fails to define this. */
32 #define MAXPATHLEN 1024
33 #endif /* not MAXPATHLEN */
37 #include "intervals.h"
42 #include "region-cache.h"
44 #include "blockinput.h"
47 struct buffer
*current_buffer
; /* the current buffer */
49 /* First buffer in chain of all buffers (in reverse order of creation).
50 Threaded through ->next. */
52 struct buffer
*all_buffers
;
54 /* This structure holds the default values of the buffer-local variables
55 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
56 The default value occupies the same slot in this structure
57 as an individual buffer's value occupies in that buffer.
58 Setting the default value also goes through the alist of buffers
59 and stores into each buffer that does not say it has a local value. */
61 struct buffer buffer_defaults
;
63 /* A Lisp_Object pointer to the above, used for staticpro */
65 static Lisp_Object Vbuffer_defaults
;
67 /* This structure marks which slots in a buffer have corresponding
68 default values in buffer_defaults.
69 Each such slot has a nonzero value in this structure.
70 The value has only one nonzero bit.
72 When a buffer has its own local value for a slot,
73 the bit for that slot (found in the same slot in this structure)
74 is turned on in the buffer's local_var_flags slot.
76 If a slot in this structure is -1, then even though there may
77 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
78 and the corresponding slot in buffer_defaults is not used.
80 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
81 but there is a default value which is copied into each buffer.
83 If a slot in this structure is negative, then even though there may
84 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
85 and the corresponding slot in buffer_defaults is not used.
87 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
88 zero, that is a bug */
90 struct buffer buffer_local_flags
;
92 /* This structure holds the names of symbols whose values may be
93 buffer-local. It is indexed and accessed in the same way as the above. */
95 struct buffer buffer_local_symbols
;
96 /* A Lisp_Object pointer to the above, used for staticpro */
97 static Lisp_Object Vbuffer_local_symbols
;
99 /* This structure holds the required types for the values in the
100 buffer-local slots. If a slot contains Qnil, then the
101 corresponding buffer slot may contain a value of any type. If a
102 slot contains an integer, then prospective values' tags must be
103 equal to that integer. When a tag does not match, the function
104 buffer_slot_type_mismatch will signal an error. */
105 struct buffer buffer_local_types
;
107 /* Flags indicating which built-in buffer-local variables
108 are permanent locals. */
109 static int buffer_permanent_local_flags
;
111 Lisp_Object
Fset_buffer ();
112 void set_buffer_internal ();
113 void set_buffer_internal_1 ();
114 static void call_overlay_mod_hooks ();
115 static void swap_out_buffer_local_variables ();
116 static void reset_buffer_local_variables ();
118 /* Alist of all buffer names vs the buffers. */
119 /* This used to be a variable, but is no longer,
120 to prevent lossage due to user rplac'ing this alist or its elements. */
121 Lisp_Object Vbuffer_alist
;
123 /* Functions to call before and after each text change. */
124 Lisp_Object Vbefore_change_function
;
125 Lisp_Object Vafter_change_function
;
126 Lisp_Object Vbefore_change_functions
;
127 Lisp_Object Vafter_change_functions
;
129 Lisp_Object Vtransient_mark_mode
;
131 /* t means ignore all read-only text properties.
132 A list means ignore such a property if its value is a member of the list.
133 Any non-nil value means ignore buffer-read-only. */
134 Lisp_Object Vinhibit_read_only
;
136 /* List of functions to call that can query about killing a buffer.
137 If any of these functions returns nil, we don't kill it. */
138 Lisp_Object Vkill_buffer_query_functions
;
140 /* List of functions to call before changing an unmodified buffer. */
141 Lisp_Object Vfirst_change_hook
;
143 Lisp_Object Qfirst_change_hook
;
144 Lisp_Object Qbefore_change_functions
;
145 Lisp_Object Qafter_change_functions
;
147 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
149 Lisp_Object Qprotected_field
;
151 Lisp_Object QSFundamental
; /* A string "Fundamental" */
153 Lisp_Object Qkill_buffer_hook
;
155 Lisp_Object Qget_file_buffer
;
157 Lisp_Object Qoverlayp
;
159 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
161 Lisp_Object Qmodification_hooks
;
162 Lisp_Object Qinsert_in_front_hooks
;
163 Lisp_Object Qinsert_behind_hooks
;
165 /* For debugging; temporary. See set_buffer_internal. */
166 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
173 error ("No buffer named %s", XSTRING (spec
)->data
);
174 error ("Invalid buffer argument");
177 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
178 "Return non-nil if OBJECT is a buffer which has not been killed.\n\
179 Value is nil if OBJECT is not a buffer or if it has been killed.")
183 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
187 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
188 "Return a list of all existing live buffers.\n\
189 If the optional arg FRAME is a frame, we return that frame's buffer list.")
193 Lisp_Object framelist
, general
;
194 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
200 CHECK_FRAME (frame
, 1);
202 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
204 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
206 while (! NILP (tail
))
208 general
= Fdelq (XCONS (tail
)->car
, general
);
209 tail
= XCONS (tail
)->cdr
;
211 return nconc2 (framelist
, general
);
217 /* Like Fassoc, but use Fstring_equal to compare
218 (which ignores text properties),
219 and don't ever QUIT. */
222 assoc_ignore_text_properties (key
, list
)
223 register Lisp_Object key
;
226 register Lisp_Object tail
;
227 for (tail
= list
; !NILP (tail
); tail
= Fcdr (tail
))
229 register Lisp_Object elt
, tem
;
231 tem
= Fstring_equal (Fcar (elt
), key
);
238 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
239 "Return the buffer named NAME (a string).\n\
240 If there is no live buffer named NAME, return nil.\n\
241 NAME may also be a buffer; if so, the value is that buffer.")
243 register Lisp_Object name
;
247 CHECK_STRING (name
, 0);
249 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
252 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
253 "Return the buffer visiting file FILENAME (a string).\n\
254 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
255 If there is no such live buffer, return nil.\n\
256 See also `find-buffer-visiting'.")
258 register Lisp_Object filename
;
260 register Lisp_Object tail
, buf
, tem
;
263 CHECK_STRING (filename
, 0);
264 filename
= Fexpand_file_name (filename
, Qnil
);
266 /* If the file name has special constructs in it,
267 call the corresponding file handler. */
268 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
270 return call2 (handler
, Qget_file_buffer
, filename
);
272 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
274 buf
= Fcdr (XCONS (tail
)->car
);
275 if (!BUFFERP (buf
)) continue;
276 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
277 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
285 get_truename_buffer (filename
)
286 register Lisp_Object filename
;
288 register Lisp_Object tail
, buf
, tem
;
290 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
292 buf
= Fcdr (XCONS (tail
)->car
);
293 if (!BUFFERP (buf
)) continue;
294 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
295 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
302 /* Incremented for each buffer created, to assign the buffer number. */
305 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
306 "Return the buffer named NAME, or create such a buffer and return it.\n\
307 A new buffer is created if there is no live buffer named NAME.\n\
308 If NAME starts with a space, the new buffer does not keep undo information.\n\
309 If NAME is a buffer instead of a string, then it is the value returned.\n\
310 The value is never nil.")
312 register Lisp_Object name
;
314 register Lisp_Object buf
;
315 register struct buffer
*b
;
317 buf
= Fget_buffer (name
);
321 if (XSTRING (name
)->size
== 0)
322 error ("Empty string for buffer name is not allowed");
324 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
326 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
328 /* An ordinary buffer uses its own struct buffer_text. */
329 b
->text
= &b
->own_text
;
332 BUF_GAP_SIZE (b
) = 20;
334 /* We allocate extra 1-byte at the tail and keep it always '\0' for
335 anchoring a search. */
336 BUFFER_ALLOC (BUF_BEG_ADDR (b
), (BUF_GAP_SIZE (b
) + 1));
338 if (! BUF_BEG_ADDR (b
))
339 buffer_memory_full ();
347 BUF_GPT_BYTE (b
) = 1;
348 BUF_BEGV_BYTE (b
) = 1;
352 BUF_OVERLAY_MODIFF (b
) = 1;
353 BUF_SAVE_MODIFF (b
) = 1;
354 BUF_INTERVALS (b
) = 0;
355 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
357 b
->newline_cache
= 0;
358 b
->width_run_cache
= 0;
359 b
->width_table
= Qnil
;
361 /* Put this on the chain of all buffers including killed ones. */
362 b
->next
= all_buffers
;
365 /* An ordinary buffer normally doesn't need markers
366 to handle BEGV and ZV. */
368 b
->begv_marker
= Qnil
;
371 name
= Fcopy_sequence (name
);
372 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
375 if (XSTRING (name
)->data
[0] != ' ')
381 reset_buffer_local_variables (b
, 1);
383 /* Put this in the alist of all live buffers. */
385 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
387 b
->mark
= Fmake_marker ();
388 BUF_MARKERS (b
) = Qnil
;
393 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
, 2, 2,
394 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
395 "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\
396 BASE-BUFFER should be an existing buffer (or buffer name).\n\
397 NAME should be a string which is not the name of an existing buffer.")
399 register Lisp_Object base_buffer
, name
;
401 register Lisp_Object buf
;
402 register struct buffer
*b
;
404 buf
= Fget_buffer (name
);
406 error ("Buffer name `%s' is in use", XSTRING (name
)->data
);
408 base_buffer
= Fget_buffer (base_buffer
);
409 if (NILP (base_buffer
))
410 error ("No such buffer: `%s'",
411 XSTRING (XBUFFER (base_buffer
)->name
)->data
);
413 if (XSTRING (name
)->size
== 0)
414 error ("Empty string for buffer name is not allowed");
416 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
418 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
420 if (XBUFFER (base_buffer
)->base_buffer
)
421 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
423 b
->base_buffer
= XBUFFER (base_buffer
);
425 /* Use the base buffer's text object. */
426 b
->text
= b
->base_buffer
->text
;
428 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
429 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
430 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
431 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
432 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
433 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
435 b
->newline_cache
= 0;
436 b
->width_run_cache
= 0;
437 b
->width_table
= Qnil
;
439 /* Put this on the chain of all buffers including killed ones. */
440 b
->next
= all_buffers
;
443 name
= Fcopy_sequence (name
);
444 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
448 reset_buffer_local_variables (b
, 1);
450 /* Put this in the alist of all live buffers. */
452 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
454 b
->mark
= Fmake_marker ();
457 /* Make sure the base buffer has markers for its narrowing. */
458 if (NILP (b
->base_buffer
->pt_marker
))
460 b
->base_buffer
->pt_marker
= Fmake_marker ();
461 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
462 BUF_PT (b
->base_buffer
),
463 BUF_PT_BYTE (b
->base_buffer
));
465 if (NILP (b
->base_buffer
->begv_marker
))
467 b
->base_buffer
->begv_marker
= Fmake_marker ();
468 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
469 BUF_BEGV (b
->base_buffer
),
470 BUF_BEGV_BYTE (b
->base_buffer
));
472 if (NILP (b
->base_buffer
->zv_marker
))
474 b
->base_buffer
->zv_marker
= Fmake_marker ();
475 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
476 BUF_ZV (b
->base_buffer
),
477 BUF_ZV_BYTE (b
->base_buffer
));
478 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
481 /* Give the indirect buffer markers for its narrowing. */
482 b
->pt_marker
= Fmake_marker ();
483 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
484 b
->begv_marker
= Fmake_marker ();
485 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
486 b
->zv_marker
= Fmake_marker ();
487 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
488 XMARKER (b
->zv_marker
)->insertion_type
= 1;
493 /* Reinitialize everything about a buffer except its name and contents
494 and local variables. */
498 register struct buffer
*b
;
501 b
->file_truename
= Qnil
;
502 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
504 XSETFASTINT (b
->save_length
, 0);
505 b
->last_window_start
= 1;
506 /* It is more conservative to start out "changed" than "unchanged". */
509 b
->auto_save_modified
= 0;
510 b
->auto_save_failure_time
= -1;
511 b
->auto_save_file_name
= Qnil
;
513 b
->overlays_before
= Qnil
;
514 b
->overlays_after
= Qnil
;
515 XSETFASTINT (b
->overlay_center
, 1);
516 b
->mark_active
= Qnil
;
517 b
->point_before_scroll
= Qnil
;
518 b
->file_format
= Qnil
;
519 b
->last_selected_window
= Qnil
;
520 XSETINT (b
->display_count
, 0);
525 /* Reset buffer B's local variables info.
526 Don't use this on a buffer that has already been in use;
527 it does not treat permanent locals consistently.
528 Instead, use Fkill_all_local_variables.
530 If PERMANENT_TOO is 1, then we reset permanent built-in
531 buffer-local variables. If PERMANENT_TOO is 0,
532 we preserve those. */
535 reset_buffer_local_variables (b
, permanent_too
)
536 register struct buffer
*b
;
542 /* Decide which built-in local variables to reset. */
546 dont_reset
= buffer_permanent_local_flags
;
548 /* Reset the major mode to Fundamental, together with all the
549 things that depend on the major mode.
550 default-major-mode is handled at a higher level.
551 We ignore it here. */
552 b
->major_mode
= Qfundamental_mode
;
554 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
555 b
->mode_name
= QSFundamental
;
556 b
->minor_modes
= Qnil
;
558 /* If the standard case table has been altered and invalidated,
559 fix up its insides first. */
560 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
561 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
562 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
563 Fset_standard_case_table (Vascii_downcase_table
);
565 b
->downcase_table
= Vascii_downcase_table
;
566 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
567 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
568 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
569 b
->invisibility_spec
= Qt
;
571 b
->buffer_file_type
= Qnil
;
575 b
->sort_table
= XSTRING (Vascii_sort_table
);
576 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
579 /* Reset all (or most) per-buffer variables to their defaults. */
580 b
->local_var_alist
= Qnil
;
581 b
->local_var_flags
&= dont_reset
;
583 /* For each slot that has a default value,
584 copy that into the slot. */
586 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
587 offset
< sizeof (struct buffer
);
588 offset
+= sizeof (Lisp_Object
)) /* sizeof EMACS_INT == sizeof Lisp_Object */
590 int flag
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
592 /* Don't reset a permanent local. */
593 && ! (dont_reset
& flag
))
595 *(Lisp_Object
*)(offset
+ (char *)b
)
596 = *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
600 /* We split this away from generate-new-buffer, because rename-buffer
601 and set-visited-file-name ought to be able to use this to really
602 rename the buffer properly. */
604 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
606 "Return a string that is the name of no existing buffer based on NAME.\n\
607 If there is no live buffer named NAME, then return NAME.\n\
608 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
609 until an unused name is found, and then return that name.\n\
610 Optional second argument IGNORE specifies a name that is okay to use\n\
611 \(if it is in the sequence to be tried)\n\
612 even if a buffer with that name exists.")
614 register Lisp_Object name
, ignore
;
616 register Lisp_Object gentemp
, tem
;
620 CHECK_STRING (name
, 0);
622 tem
= Fget_buffer (name
);
629 sprintf (number
, "<%d>", ++count
);
630 gentemp
= concat2 (name
, build_string (number
));
631 tem
= Fstring_equal (gentemp
, ignore
);
634 tem
= Fget_buffer (gentemp
);
641 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
642 "Return the name of BUFFER, as a string.\n\
643 With no argument or nil as argument, return the name of the current buffer.")
645 register Lisp_Object buffer
;
648 return current_buffer
->name
;
649 CHECK_BUFFER (buffer
, 0);
650 return XBUFFER (buffer
)->name
;
653 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
654 "Return name of file BUFFER is visiting, or nil if none.\n\
655 No argument or nil as argument means use the current buffer.")
657 register Lisp_Object buffer
;
660 return current_buffer
->filename
;
661 CHECK_BUFFER (buffer
, 0);
662 return XBUFFER (buffer
)->filename
;
665 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
667 "Return the base buffer of indirect buffer BUFFER.\n\
668 If BUFFER is not indirect, return nil.")
670 register Lisp_Object buffer
;
673 Lisp_Object base_buffer
;
676 base
= current_buffer
->base_buffer
;
679 CHECK_BUFFER (buffer
, 0);
680 base
= XBUFFER (buffer
)->base_buffer
;
685 XSETBUFFER (base_buffer
, base
);
689 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
690 Sbuffer_local_variables
, 0, 1, 0,
691 "Return an alist of variables that are buffer-local in BUFFER.\n\
692 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
693 For a symbol that is locally unbound, just the symbol appears in the value.\n\
694 Note that storing new VALUEs in these elements doesn't change the variables.\n\
695 No argument or nil as argument means use current buffer as BUFFER.")
697 register Lisp_Object buffer
;
699 register struct buffer
*buf
;
700 register Lisp_Object result
;
703 buf
= current_buffer
;
706 CHECK_BUFFER (buffer
, 0);
707 buf
= XBUFFER (buffer
);
713 register Lisp_Object tail
;
714 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
716 Lisp_Object val
, elt
;
718 elt
= XCONS (tail
)->car
;
720 /* Reference each variable in the alist in buf.
721 If inquiring about the current buffer, this gets the current values,
722 so store them into the alist so the alist is up to date.
723 If inquiring about some other buffer, this swaps out any values
724 for that buffer, making the alist up to date automatically. */
725 val
= find_symbol_value (XCONS (elt
)->car
);
726 /* Use the current buffer value only if buf is the current buffer. */
727 if (buf
!= current_buffer
)
728 val
= XCONS (elt
)->cdr
;
730 /* If symbol is unbound, put just the symbol in the list. */
731 if (EQ (val
, Qunbound
))
732 result
= Fcons (XCONS (elt
)->car
, result
);
733 /* Otherwise, put (symbol . value) in the list. */
735 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
739 /* Add on all the variables stored in special slots. */
741 register int offset
, mask
;
743 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
744 offset
< sizeof (struct buffer
);
745 offset
+= (sizeof (EMACS_INT
))) /* sizeof EMACS_INT == sizeof Lisp_Object */
747 mask
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
748 if (mask
== -1 || (buf
->local_var_flags
& mask
))
749 if (SYMBOLP (*(Lisp_Object
*)(offset
750 + (char *)&buffer_local_symbols
)))
751 result
= Fcons (Fcons (*((Lisp_Object
*)
752 (offset
+ (char *)&buffer_local_symbols
)),
753 *(Lisp_Object
*)(offset
+ (char *)buf
)),
762 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
764 "Return t if BUFFER was modified since its file was last read or saved.\n\
765 No argument or nil as argument means use current buffer as BUFFER.")
767 register Lisp_Object buffer
;
769 register struct buffer
*buf
;
771 buf
= current_buffer
;
774 CHECK_BUFFER (buffer
, 0);
775 buf
= XBUFFER (buffer
);
778 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
781 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
783 "Mark current buffer as modified or unmodified according to FLAG.\n\
784 A non-nil FLAG means mark the buffer modified.")
786 register Lisp_Object flag
;
788 register int already
;
789 register Lisp_Object fn
;
791 #ifdef CLASH_DETECTION
792 /* If buffer becoming modified, lock the file.
793 If buffer becoming unmodified, unlock the file. */
795 fn
= current_buffer
->file_truename
;
798 already
= SAVE_MODIFF
< MODIFF
;
799 if (!already
&& !NILP (flag
))
801 else if (already
&& NILP (flag
))
804 #endif /* CLASH_DETECTION */
806 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
811 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
813 "Return BUFFER's tick counter, incremented for each change in text.\n\
814 Each buffer has a tick counter which is incremented each time the text in\n\
815 that buffer is changed. It wraps around occasionally.\n\
816 No argument or nil as argument means use current buffer as BUFFER.")
818 register Lisp_Object buffer
;
820 register struct buffer
*buf
;
822 buf
= current_buffer
;
825 CHECK_BUFFER (buffer
, 0);
826 buf
= XBUFFER (buffer
);
829 return make_number (BUF_MODIFF (buf
));
832 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
833 "sRename buffer (to new name): \nP",
834 "Change current buffer's name to NEWNAME (a string).\n\
835 If second arg UNIQUE is nil or omitted, it is an error if a\n\
836 buffer named NEWNAME already exists.\n\
837 If UNIQUE is non-nil, come up with a new name using\n\
838 `generate-new-buffer-name'.\n\
839 Interactively, you can set UNIQUE with a prefix argument.\n\
840 We return the name we actually gave the buffer.\n\
841 This does not change the name of the visited file (if any).")
843 register Lisp_Object newname
, unique
;
845 register Lisp_Object tem
, buf
;
847 CHECK_STRING (newname
, 0);
849 if (XSTRING (newname
)->size
== 0)
850 error ("Empty string is invalid as a buffer name");
852 tem
= Fget_buffer (newname
);
853 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
854 the buffer automatically so you can create another with the original name.
855 It makes UNIQUE equivalent to
856 (rename-buffer (generate-new-buffer-name NEWNAME)). */
857 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
858 return current_buffer
->name
;
862 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
864 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
867 current_buffer
->name
= newname
;
869 /* Catch redisplay's attention. Unless we do this, the mode lines for
870 any windows displaying current_buffer will stay unchanged. */
873 XSETBUFFER (buf
, current_buffer
);
874 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
875 if (NILP (current_buffer
->filename
)
876 && !NILP (current_buffer
->auto_save_file_name
))
877 call0 (intern ("rename-auto-save-file"));
878 /* Refetch since that last call may have done GC. */
879 return current_buffer
->name
;
882 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 2, 0,
883 "Return most recently selected buffer other than BUFFER.\n\
884 Buffers not visible in windows are preferred to visible buffers,\n\
885 unless optional second argument VISIBLE-OK is non-nil.\n\
886 If no other buffer exists, the buffer `*scratch*' is returned.\n\
887 If BUFFER is omitted or nil, some interesting buffer is returned.")
889 register Lisp_Object buffer
, visible_ok
;
891 Lisp_Object
Fset_buffer_major_mode ();
892 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
895 tail
= Vbuffer_alist
;
896 pred
= frame_buffer_predicate ();
898 /* Consider buffers that have been seen in the selected frame
899 before other buffers. */
901 tem
= frame_buffer_list ();
905 if (BUFFERP (XCONS (tem
)->car
))
906 add_ons
= Fcons (Fcons (Qnil
, XCONS (tem
)->car
), add_ons
);
907 tem
= XCONS (tem
)->cdr
;
909 tail
= nconc2 (Fnreverse (add_ons
), tail
);
911 for (; !NILP (tail
); tail
= Fcdr (tail
))
913 buf
= Fcdr (Fcar (tail
));
914 if (EQ (buf
, buffer
))
916 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
918 /* If the selected frame has a buffer_predicate,
919 disregard buffers that don't fit the predicate. */
922 tem
= call1 (pred
, buf
);
927 if (NILP (visible_ok
))
928 tem
= Fget_buffer_window (buf
, Qt
);
933 if (NILP (notsogood
))
936 if (!NILP (notsogood
))
938 buf
= Fget_buffer_create (build_string ("*scratch*"));
939 Fset_buffer_major_mode (buf
);
943 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
945 "Make BUFFER stop keeping undo information.\n\
946 No argument or nil as argument means do this for the current buffer.")
948 register Lisp_Object buffer
;
950 Lisp_Object real_buffer
;
953 XSETBUFFER (real_buffer
, current_buffer
);
956 real_buffer
= Fget_buffer (buffer
);
957 if (NILP (real_buffer
))
961 XBUFFER (real_buffer
)->undo_list
= Qt
;
966 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
968 "Start keeping undo information for buffer BUFFER.\n\
969 No argument or nil as argument means do this for the current buffer.")
971 register Lisp_Object buffer
;
973 Lisp_Object real_buffer
;
976 XSETBUFFER (real_buffer
, current_buffer
);
979 real_buffer
= Fget_buffer (buffer
);
980 if (NILP (real_buffer
))
984 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
985 XBUFFER (real_buffer
)->undo_list
= Qnil
;
991 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
992 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
993 The buffer being killed will be current while the hook is running.\n\
996 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
997 "Kill the buffer BUFFER.\n\
998 The argument may be a buffer or may be the name of a buffer.\n\
999 An argument of nil means kill the current buffer.\n\n\
1000 Value is t if the buffer is actually killed, nil if user says no.\n\n\
1001 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
1002 if not void, is a list of functions to be called, with no arguments,\n\
1003 before the buffer is actually killed. The buffer to be killed is current\n\
1004 when the hook functions are called.\n\n\
1005 Any processes that have this buffer as the `process-buffer' are killed\n\
1011 register struct buffer
*b
;
1012 register Lisp_Object tem
;
1013 register struct Lisp_Marker
*m
;
1014 struct gcpro gcpro1
, gcpro2
;
1017 buf
= Fcurrent_buffer ();
1019 buf
= Fget_buffer (buffer
);
1025 /* Avoid trouble for buffer already dead. */
1029 /* Query if the buffer is still modified. */
1030 if (INTERACTIVE
&& !NILP (b
->filename
)
1031 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1034 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
1035 XSTRING (b
->name
)->data
));
1041 /* Run hooks with the buffer to be killed the current buffer. */
1043 register Lisp_Object val
;
1044 int count
= specpdl_ptr
- specpdl
;
1047 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1048 set_buffer_internal (b
);
1050 /* First run the query functions; if any query is answered no,
1051 don't kill the buffer. */
1052 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
1054 tem
= call0 (Fcar (list
));
1056 return unbind_to (count
, Qnil
);
1059 /* Then run the hooks. */
1060 if (!NILP (Vrun_hooks
))
1061 call1 (Vrun_hooks
, Qkill_buffer_hook
);
1062 unbind_to (count
, Qnil
);
1065 /* We have no more questions to ask. Verify that it is valid
1066 to kill the buffer. This must be done after the questions
1067 since anything can happen within do_yes_or_no_p. */
1069 /* Don't kill the minibuffer now current. */
1070 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1076 /* When we kill a base buffer, kill all its indirect buffers.
1077 We do it at this stage so nothing terrible happens if they
1078 ask questions or their hooks get errors. */
1079 if (! b
->base_buffer
)
1081 struct buffer
*other
;
1085 for (other
= all_buffers
; other
; other
= other
->next
)
1086 /* all_buffers contains dead buffers too;
1087 don't re-kill them. */
1088 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1091 XSETBUFFER (buf
, other
);
1098 /* Make this buffer not be current.
1099 In the process, notice if this is the sole visible buffer
1100 and give up if so. */
1101 if (b
== current_buffer
)
1103 tem
= Fother_buffer (buf
, Qnil
);
1105 if (b
== current_buffer
)
1109 /* Now there is no question: we can kill the buffer. */
1111 #ifdef CLASH_DETECTION
1112 /* Unlock this buffer's file, if it is locked. */
1114 #endif /* CLASH_DETECTION */
1116 kill_buffer_processes (buf
);
1118 tem
= Vinhibit_quit
;
1120 replace_buffer_in_all_windows (buf
);
1121 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1122 frames_discard_buffer (buf
);
1123 Vinhibit_quit
= tem
;
1125 /* Delete any auto-save file, if we saved it in this session. */
1126 if (STRINGP (b
->auto_save_file_name
)
1127 && b
->auto_save_modified
!= 0
1128 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
)
1131 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1133 internal_delete_file (b
->auto_save_file_name
);
1138 /* Unchain all markers that belong to this indirect buffer.
1139 Don't unchain the markers that belong to the base buffer
1140 or its other indirect buffers. */
1141 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1147 unchain_marker (tem
);
1153 /* Unchain all markers of this buffer and its indirect buffers.
1154 and leave them pointing nowhere. */
1155 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1162 BUF_MARKERS (b
) = Qnil
;
1164 #ifdef USE_TEXT_PROPERTIES
1165 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1168 /* Perhaps we should explicitly free the interval tree here... */
1171 /* Reset the local variables, so that this buffer's local values
1172 won't be protected from GC. They would be protected
1173 if they happened to remain encached in their symbols.
1174 This gets rid of them for certain. */
1175 swap_out_buffer_local_variables (b
);
1176 reset_buffer_local_variables (b
, 1);
1181 if (! b
->base_buffer
)
1182 BUFFER_FREE (BUF_BEG_ADDR (b
));
1184 if (b
->newline_cache
)
1186 free_region_cache (b
->newline_cache
);
1187 b
->newline_cache
= 0;
1189 if (b
->width_run_cache
)
1191 free_region_cache (b
->width_run_cache
);
1192 b
->width_run_cache
= 0;
1194 b
->width_table
= Qnil
;
1196 b
->undo_list
= Qnil
;
1201 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1202 we do this each time BUF is selected visibly, the more recently
1203 selected buffers are always closer to the front of the list. This
1204 means that other_buffer is more likely to choose a relevant buffer. */
1210 register Lisp_Object link
, prev
;
1213 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
1215 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
1220 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1221 we cannot use Fdelq itself here because it allows quitting. */
1224 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
1226 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1228 XCONS (link
)->cdr
= Vbuffer_alist
;
1229 Vbuffer_alist
= link
;
1231 /* Now move this buffer to the front of frame_buffer_list also. */
1234 for (link
= frame_buffer_list (); CONSP (link
); link
= XCONS (link
)->cdr
)
1236 if (EQ (XCONS (link
)->car
, buf
))
1241 /* Effectively do delq. */
1246 set_frame_buffer_list (XCONS (frame_buffer_list ())->cdr
);
1248 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1250 XCONS (link
)->cdr
= frame_buffer_list ();
1251 set_frame_buffer_list (link
);
1254 set_frame_buffer_list (Fcons (buf
, frame_buffer_list ()));
1257 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1258 "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\
1259 Use this function before selecting the buffer, since it may need to inspect\n\
1260 the current buffer's major mode.")
1265 Lisp_Object function
;
1267 function
= buffer_defaults
.major_mode
;
1268 if (NILP (function
) && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1269 function
= current_buffer
->major_mode
;
1271 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1274 count
= specpdl_ptr
- specpdl
;
1276 /* To select a nonfundamental mode,
1277 select the buffer temporarily and then call the mode function. */
1279 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1281 Fset_buffer (buffer
);
1284 return unbind_to (count
, Qnil
);
1287 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1288 "Select buffer BUFFER in the current window.\n\
1289 BUFFER may be a buffer or a buffer name.\n\
1290 Optional second arg NORECORD non-nil means\n\
1291 do not put this buffer at the front of the list of recently selected ones.\n\
1293 WARNING: This is NOT the way to work on another buffer temporarily\n\
1294 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
1295 the window-buffer correspondences.")
1297 Lisp_Object buffer
, norecord
;
1299 register Lisp_Object buf
;
1302 if (EQ (minibuf_window
, selected_window
))
1303 error ("Cannot switch buffers in minibuffer window");
1304 tem
= Fwindow_dedicated_p (selected_window
);
1306 error ("Cannot switch buffers in a dedicated window");
1309 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
1312 buf
= Fget_buffer (buffer
);
1315 buf
= Fget_buffer_create (buffer
);
1316 Fset_buffer_major_mode (buf
);
1320 if (NILP (norecord
))
1321 record_buffer (buf
);
1323 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1324 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1331 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1332 "Select buffer BUFFER in some window, preferably a different one.\n\
1333 If BUFFER is nil, then some other buffer is chosen.\n\
1334 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
1335 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
1336 window even if BUFFER is already visible in the selected window.\n\
1337 This uses the function `display-buffer' as a subroutine; see the documentation\n\
1338 of `display-buffer' for additional customization information.\n\
1340 Optional third arg NORECORD non-nil means\n\
1341 do not put this buffer at the front of the list of recently selected ones.")
1342 (buffer
, other_window
, norecord
)
1343 Lisp_Object buffer
, other_window
, norecord
;
1345 register Lisp_Object buf
;
1347 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
1350 buf
= Fget_buffer (buffer
);
1353 buf
= Fget_buffer_create (buffer
);
1354 Fset_buffer_major_mode (buf
);
1358 if (NILP (norecord
))
1359 record_buffer (buf
);
1360 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1364 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1365 "Return the current buffer as a Lisp object.")
1368 register Lisp_Object buf
;
1369 XSETBUFFER (buf
, current_buffer
);
1373 /* Set the current buffer to B. */
1376 set_buffer_internal (b
)
1377 register struct buffer
*b
;
1379 register struct buffer
*old_buf
;
1380 register Lisp_Object tail
, valcontents
;
1383 if (current_buffer
== b
)
1386 windows_or_buffers_changed
= 1;
1387 set_buffer_internal_1 (b
);
1390 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1391 This is used by redisplay. */
1394 set_buffer_internal_1 (b
)
1395 register struct buffer
*b
;
1397 register struct buffer
*old_buf
;
1398 register Lisp_Object tail
, valcontents
;
1401 if (current_buffer
== b
)
1404 old_buf
= current_buffer
;
1406 last_known_column_point
= -1; /* invalidate indentation cache */
1410 /* Put the undo list back in the base buffer, so that it appears
1411 that an indirect buffer shares the undo list of its base. */
1412 if (old_buf
->base_buffer
)
1413 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1415 /* If the old current buffer has markers to record PT, BEGV and ZV
1416 when it is not current, update them now. */
1417 if (! NILP (old_buf
->pt_marker
))
1420 XSETBUFFER (obuf
, old_buf
);
1421 set_marker_both (old_buf
->pt_marker
, obuf
,
1422 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1424 if (! NILP (old_buf
->begv_marker
))
1427 XSETBUFFER (obuf
, old_buf
);
1428 set_marker_both (old_buf
->begv_marker
, obuf
,
1429 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1431 if (! NILP (old_buf
->zv_marker
))
1434 XSETBUFFER (obuf
, old_buf
);
1435 set_marker_both (old_buf
->zv_marker
, obuf
,
1436 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1440 /* Get the undo list from the base buffer, so that it appears
1441 that an indirect buffer shares the undo list of its base. */
1443 b
->undo_list
= b
->base_buffer
->undo_list
;
1445 /* If the new current buffer has markers to record PT, BEGV and ZV
1446 when it is not current, fetch them now. */
1447 if (! NILP (b
->pt_marker
))
1449 BUF_PT (b
) = marker_position (b
->pt_marker
);
1450 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1452 if (! NILP (b
->begv_marker
))
1454 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1455 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1457 if (! NILP (b
->zv_marker
))
1459 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1460 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1463 /* Look down buffer's list of local Lisp variables
1464 to find and update any that forward into C variables. */
1466 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1468 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1469 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1470 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1471 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->car
,
1472 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1473 /* Just reference the variable
1474 to cause it to become set for this buffer. */
1475 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1478 /* Do the same with any others that were local to the previous buffer */
1481 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1483 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1484 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1485 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1486 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->car
,
1487 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1488 /* Just reference the variable
1489 to cause it to become set for this buffer. */
1490 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1494 /* Switch to buffer B temporarily for redisplay purposes.
1495 This avoids certain things that don't need to be done within redisplay. */
1501 register struct buffer
*old_buf
;
1503 if (current_buffer
== b
)
1506 old_buf
= current_buffer
;
1511 /* If the old current buffer has markers to record PT, BEGV and ZV
1512 when it is not current, update them now. */
1513 if (! NILP (old_buf
->pt_marker
))
1516 XSETBUFFER (obuf
, old_buf
);
1517 set_marker_both (old_buf
->pt_marker
, obuf
,
1518 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1520 if (! NILP (old_buf
->begv_marker
))
1523 XSETBUFFER (obuf
, old_buf
);
1524 set_marker_both (old_buf
->begv_marker
, obuf
,
1525 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1527 if (! NILP (old_buf
->zv_marker
))
1530 XSETBUFFER (obuf
, old_buf
);
1531 set_marker_both (old_buf
->zv_marker
, obuf
,
1532 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1536 /* If the new current buffer has markers to record PT, BEGV and ZV
1537 when it is not current, fetch them now. */
1538 if (! NILP (b
->pt_marker
))
1540 BUF_PT (b
) = marker_position (b
->pt_marker
);
1541 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1543 if (! NILP (b
->begv_marker
))
1545 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1546 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1548 if (! NILP (b
->zv_marker
))
1550 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1551 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1555 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1556 "Make the buffer BUFFER current for editing operations.\n\
1557 BUFFER may be a buffer or the name of an existing buffer.\n\
1558 See also `save-excursion' when you want to make a buffer current temporarily.\n\
1559 This function does not display the buffer, so its effect ends\n\
1560 when the current command terminates.\n\
1561 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
1563 register Lisp_Object buffer
;
1565 register Lisp_Object buf
;
1566 buf
= Fget_buffer (buffer
);
1569 if (NILP (XBUFFER (buf
)->name
))
1570 error ("Selecting deleted buffer");
1571 set_buffer_internal (XBUFFER (buf
));
1575 /* Set the current buffer to BUFFER provided it is alive. */
1578 set_buffer_if_live (buffer
)
1581 if (! NILP (XBUFFER (buffer
)->name
))
1582 Fset_buffer (buffer
);
1586 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1587 Sbarf_if_buffer_read_only
, 0, 0, 0,
1588 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1591 if (!NILP (current_buffer
->read_only
)
1592 && NILP (Vinhibit_read_only
))
1593 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1597 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1598 "Put BUFFER at the end of the list of all buffers.\n\
1599 There it is the least likely candidate for `other-buffer' to return;\n\
1600 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1601 If BUFFER is nil or omitted, bury the current buffer.\n\
1602 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1603 selected window if it is displayed there.")
1605 register Lisp_Object buffer
;
1607 /* Figure out what buffer we're going to bury. */
1610 XSETBUFFER (buffer
, current_buffer
);
1612 /* If we're burying the current buffer, unshow it. */
1613 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
), Qnil
);
1619 buf1
= Fget_buffer (buffer
);
1625 /* Move buffer to the end of the buffer list. */
1627 register Lisp_Object aelt
, link
;
1629 aelt
= Frassq (buffer
, Vbuffer_alist
);
1630 link
= Fmemq (aelt
, Vbuffer_alist
);
1631 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1632 XCONS (link
)->cdr
= Qnil
;
1633 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1636 frames_bury_buffer (buffer
);
1641 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1642 "Delete the entire contents of the current buffer.\n\
1643 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1644 so the buffer is truly empty after this.")
1649 current_buffer
->last_window_start
= 1;
1650 /* Prevent warnings, or suspension of auto saving, that would happen
1651 if future size is less than past size. Use of erase-buffer
1652 implies that the future text is not really related to the past text. */
1653 XSETFASTINT (current_buffer
->save_length
, 0);
1658 validate_region (b
, e
)
1659 register Lisp_Object
*b
, *e
;
1661 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1662 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1664 if (XINT (*b
) > XINT (*e
))
1667 tem
= *b
; *b
= *e
; *e
= tem
;
1670 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1671 && XINT (*e
) <= ZV
))
1672 args_out_of_range (*b
, *e
);
1675 /* Advance BYTE_POS up to a character boundary
1676 and return the adjusted position. */
1679 advance_to_char_boundary (byte_pos
)
1686 int c
= FETCH_BYTE (pos
);
1687 if (SINGLE_BYTE_CHAR_P (c
))
1689 if (c
== LEADING_CODE_COMPOSITION
)
1691 if (BYTES_BY_CHAR_HEAD (c
) > 1)
1699 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
1701 "Set the multibyte flag of the current buffer to FLAG.\n\
1702 If FLAG is t, this makes the buffer a multibyte buffer.\n\
1703 If FLAG is nil, this makes the buffer a single-byte buffer.\n\
1704 The buffer contents remain unchanged as a sequence of bytes\n\
1705 but the contents viewed as characters do change.")
1709 Lisp_Object tail
, markers
;
1711 /* It would be better to update the list,
1712 but this is good enough for now. */
1713 if (! EQ (current_buffer
->undo_list
, Qt
))
1714 current_buffer
->undo_list
= Qnil
;
1716 /* If the cached position is for this buffer, clear it out. */
1717 clear_charpos_cache (current_buffer
);
1721 /* Do this first, so it can use CHAR_TO_BYTE
1722 to calculate the old correspondences. */
1723 set_intervals_multibyte (0);
1725 current_buffer
->enable_multibyte_characters
= Qnil
;
1731 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
1733 tail
= BUF_MARKERS (current_buffer
);
1734 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1736 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
1737 tail
= XMARKER (tail
)->chain
;
1742 /* Do this first, so that chars_in_text asks the right question.
1743 set_intervals_multibyte needs it too. */
1744 current_buffer
->enable_multibyte_characters
= Qt
;
1746 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
1747 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
1749 Z
= chars_in_text (GPT_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
1751 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
1752 if (BEGV_BYTE
> GPT_BYTE
)
1753 BEGV
= chars_in_text (GPT_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
1755 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
1757 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
1758 if (ZV_BYTE
> GPT_BYTE
)
1759 ZV
= chars_in_text (GPT_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
1761 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
1764 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
1767 if (pt_byte
> GPT_BYTE
)
1768 pt
= chars_in_text (GPT_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
1770 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
1771 TEMP_SET_PT_BOTH (pt
, pt_byte
);
1774 tail
= markers
= BUF_MARKERS (current_buffer
);
1775 BUF_MARKERS (current_buffer
) = Qnil
;
1777 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1779 XMARKER (tail
)->bytepos
1780 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
1781 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
1783 tail
= XMARKER (tail
)->chain
;
1785 BUF_MARKERS (current_buffer
) = markers
;
1787 /* Do this last, so it can calculate the new correspondences
1788 between chars and bytes. */
1789 set_intervals_multibyte (1);
1795 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1797 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1798 Most local variable bindings are eliminated so that the default values\n\
1799 become effective once more. Also, the syntax table is set from\n\
1800 `standard-syntax-table', the local keymap is set to nil,\n\
1801 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1802 This function also forces redisplay of the mode line.\n\
1804 Every function to select a new major mode starts by\n\
1805 calling this function.\n\n\
1806 As a special exception, local variables whose names have\n\
1807 a non-nil `permanent-local' property are not eliminated by this function.\n\
1809 The first thing this function does is run\n\
1810 the normal hook `change-major-mode-hook'.")
1813 register Lisp_Object alist
, sym
, tem
;
1816 if (!NILP (Vrun_hooks
))
1817 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1818 oalist
= current_buffer
->local_var_alist
;
1820 /* Make sure none of the bindings in oalist
1821 remain swapped in, in their symbols. */
1823 swap_out_buffer_local_variables (current_buffer
);
1825 /* Actually eliminate all local bindings of this buffer. */
1827 reset_buffer_local_variables (current_buffer
, 0);
1829 /* Redisplay mode lines; we are changing major mode. */
1831 update_mode_lines
++;
1833 /* Any which are supposed to be permanent,
1834 make local again, with the same values they had. */
1836 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1838 sym
= XCONS (XCONS (alist
)->car
)->car
;
1839 tem
= Fget (sym
, Qpermanent_local
);
1842 Fmake_local_variable (sym
);
1843 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1847 /* Force mode-line redisplay. Useful here because all major mode
1848 commands call this function. */
1849 update_mode_lines
++;
1854 /* Make sure no local variables remain set up with buffer B
1855 for their current values. */
1858 swap_out_buffer_local_variables (b
)
1861 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
1863 XSETBUFFER (buffer
, b
);
1864 oalist
= b
->local_var_alist
;
1866 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1868 sym
= XCONS (XCONS (alist
)->car
)->car
;
1870 /* Need not do anything if some other buffer's binding is now encached. */
1871 tem
= XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->car
;
1872 if (XBUFFER (tem
) == current_buffer
)
1874 /* Symbol is set up for this buffer's old local value.
1875 Set it up for the current buffer with the default value. */
1877 tem
= XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1878 /* Store the symbol's current value into the alist entry
1879 it is currently set up for. This is so that, if the
1880 local is marked permanent, and we make it local again
1881 later in Fkill_all_local_variables, we don't lose the value. */
1882 XCONS (XCONS (tem
)->car
)->cdr
1883 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->car
);
1884 /* Switch to the symbol's default-value alist entry. */
1885 XCONS (tem
)->car
= tem
;
1886 /* Mark it as current for buffer B. */
1887 XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->car
1889 /* Store the current value into any forwarding in the symbol. */
1890 store_symval_forwarding (sym
, XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->car
,
1896 /* Find all the overlays in the current buffer that contain position POS.
1897 Return the number found, and store them in a vector in *VEC_PTR.
1898 Store in *LEN_PTR the size allocated for the vector.
1899 Store in *NEXT_PTR the next position after POS where an overlay starts,
1900 or ZV if there are no more overlays.
1901 Store in *PREV_PTR the previous position before POS where an overlay ends,
1902 or BEGV if there are no previous overlays.
1903 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
1905 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1906 when this function is called.
1908 If EXTEND is non-zero, we make the vector bigger if necessary.
1909 If EXTEND is zero, we never extend the vector,
1910 and we store only as many overlays as will fit.
1911 But we still return the total number of overlays. */
1914 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
1917 Lisp_Object
**vec_ptr
;
1922 Lisp_Object tail
, overlay
, start
, end
, result
;
1925 Lisp_Object
*vec
= *vec_ptr
;
1928 int inhibit_storing
= 0;
1930 for (tail
= current_buffer
->overlays_before
;
1932 tail
= XCONS (tail
)->cdr
)
1934 int startpos
, endpos
;
1936 overlay
= XCONS (tail
)->car
;
1938 start
= OVERLAY_START (overlay
);
1939 end
= OVERLAY_END (overlay
);
1940 endpos
= OVERLAY_POSITION (end
);
1949 startpos
= OVERLAY_POSITION (start
);
1950 if (startpos
<= pos
)
1954 /* The supplied vector is full.
1955 Either make it bigger, or don't store any more in it. */
1958 *len_ptr
= len
*= 2;
1959 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1963 inhibit_storing
= 1;
1966 if (!inhibit_storing
)
1968 /* Keep counting overlays even if we can't return them all. */
1971 else if (startpos
< next
)
1975 for (tail
= current_buffer
->overlays_after
;
1977 tail
= XCONS (tail
)->cdr
)
1979 int startpos
, endpos
;
1981 overlay
= XCONS (tail
)->car
;
1983 start
= OVERLAY_START (overlay
);
1984 end
= OVERLAY_END (overlay
);
1985 startpos
= OVERLAY_POSITION (start
);
1988 if (startpos
< next
)
1992 endpos
= OVERLAY_POSITION (end
);
1999 *len_ptr
= len
*= 2;
2000 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2004 inhibit_storing
= 1;
2007 if (!inhibit_storing
)
2011 else if (endpos
< pos
&& endpos
> prev
)
2022 /* Find all the overlays in the current buffer that overlap the range BEG-END
2023 or are empty at BEG.
2025 Return the number found, and store them in a vector in *VEC_PTR.
2026 Store in *LEN_PTR the size allocated for the vector.
2027 Store in *NEXT_PTR the next position after POS where an overlay starts,
2028 or ZV if there are no more overlays.
2029 Store in *PREV_PTR the previous position before POS where an overlay ends,
2030 or BEGV if there are no previous overlays.
2031 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2033 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2034 when this function is called.
2036 If EXTEND is non-zero, we make the vector bigger if necessary.
2037 If EXTEND is zero, we never extend the vector,
2038 and we store only as many overlays as will fit.
2039 But we still return the total number of overlays. */
2042 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2045 Lisp_Object
**vec_ptr
;
2050 Lisp_Object tail
, overlay
, ostart
, oend
, result
;
2053 Lisp_Object
*vec
= *vec_ptr
;
2056 int inhibit_storing
= 0;
2058 for (tail
= current_buffer
->overlays_before
;
2060 tail
= XCONS (tail
)->cdr
)
2062 int startpos
, endpos
;
2064 overlay
= XCONS (tail
)->car
;
2066 ostart
= OVERLAY_START (overlay
);
2067 oend
= OVERLAY_END (overlay
);
2068 endpos
= OVERLAY_POSITION (oend
);
2075 startpos
= OVERLAY_POSITION (ostart
);
2076 /* Count an interval if it either overlaps the range
2077 or is empty at the start of the range. */
2078 if ((beg
< endpos
&& startpos
< end
)
2079 || (startpos
== endpos
&& beg
== endpos
))
2083 /* The supplied vector is full.
2084 Either make it bigger, or don't store any more in it. */
2087 *len_ptr
= len
*= 2;
2088 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2092 inhibit_storing
= 1;
2095 if (!inhibit_storing
)
2097 /* Keep counting overlays even if we can't return them all. */
2100 else if (startpos
< next
)
2104 for (tail
= current_buffer
->overlays_after
;
2106 tail
= XCONS (tail
)->cdr
)
2108 int startpos
, endpos
;
2110 overlay
= XCONS (tail
)->car
;
2112 ostart
= OVERLAY_START (overlay
);
2113 oend
= OVERLAY_END (overlay
);
2114 startpos
= OVERLAY_POSITION (ostart
);
2117 if (startpos
< next
)
2121 endpos
= OVERLAY_POSITION (oend
);
2122 /* Count an interval if it either overlaps the range
2123 or is empty at the start of the range. */
2124 if ((beg
< endpos
&& startpos
< end
)
2125 || (startpos
== endpos
&& beg
== endpos
))
2131 *len_ptr
= len
*= 2;
2132 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2136 inhibit_storing
= 1;
2139 if (!inhibit_storing
)
2143 else if (endpos
< beg
&& endpos
> prev
)
2154 /* Fast function to just test if we're at an overlay boundary. */
2156 overlay_touches_p (pos
)
2159 Lisp_Object tail
, overlay
;
2161 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2162 tail
= XCONS (tail
)->cdr
)
2166 overlay
= XCONS (tail
)->car
;
2167 if (!GC_OVERLAYP (overlay
))
2170 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2173 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2177 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2178 tail
= XCONS (tail
)->cdr
)
2182 overlay
= XCONS (tail
)->car
;
2183 if (!GC_OVERLAYP (overlay
))
2186 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2189 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2197 Lisp_Object overlay
;
2203 compare_overlays (s1
, s2
)
2204 struct sortvec
*s1
, *s2
;
2206 if (s1
->priority
!= s2
->priority
)
2207 return s1
->priority
- s2
->priority
;
2208 if (s1
->beg
!= s2
->beg
)
2209 return s1
->beg
- s2
->beg
;
2210 if (s1
->end
!= s2
->end
)
2211 return s2
->end
- s1
->end
;
2215 /* Sort an array of overlays by priority. The array is modified in place.
2216 The return value is the new size; this may be smaller than the original
2217 size if some of the overlays were invalid or were window-specific. */
2219 sort_overlays (overlay_vec
, noverlays
, w
)
2220 Lisp_Object
*overlay_vec
;
2225 struct sortvec
*sortvec
;
2226 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2228 /* Put the valid and relevant overlays into sortvec. */
2230 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2233 Lisp_Object overlay
;
2235 overlay
= overlay_vec
[i
];
2236 if (OVERLAY_VALID (overlay
)
2237 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2238 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2240 /* If we're interested in a specific window, then ignore
2241 overlays that are limited to some other window. */
2246 window
= Foverlay_get (overlay
, Qwindow
);
2247 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2251 /* This overlay is good and counts: put it into sortvec. */
2252 sortvec
[j
].overlay
= overlay
;
2253 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2254 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2255 tem
= Foverlay_get (overlay
, Qpriority
);
2257 sortvec
[j
].priority
= XINT (tem
);
2259 sortvec
[j
].priority
= 0;
2265 /* Sort the overlays into the proper order: increasing priority. */
2268 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2270 for (i
= 0; i
< noverlays
; i
++)
2271 overlay_vec
[i
] = sortvec
[i
].overlay
;
2277 Lisp_Object string
, string2
;
2284 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2285 int size
; /* Allocated length of that array. */
2286 int used
; /* How much of the array is currently in use. */
2287 int bytes
; /* Total length of the strings in buf. */
2290 /* Buffers for storing information about the overlays touching a given
2291 position. These could be automatic variables in overlay_strings, but
2292 it's more efficient to hold onto the memory instead of repeatedly
2293 allocating and freeing it. */
2294 static struct sortstrlist overlay_heads
, overlay_tails
;
2295 static unsigned char *overlay_str_buf
;
2297 /* Allocated length of overlay_str_buf. */
2298 static int overlay_str_len
;
2300 /* A comparison function suitable for passing to qsort. */
2302 cmp_for_strings (as1
, as2
)
2305 struct sortstr
*s1
= (struct sortstr
*)as1
;
2306 struct sortstr
*s2
= (struct sortstr
*)as2
;
2307 if (s1
->size
!= s2
->size
)
2308 return s2
->size
- s1
->size
;
2309 if (s1
->priority
!= s2
->priority
)
2310 return s1
->priority
- s2
->priority
;
2315 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2316 struct sortstrlist
*ssl
;
2317 Lisp_Object str
, str2
, pri
;
2322 if (ssl
->used
== ssl
->size
)
2328 ssl
->buf
= ((struct sortstr
*)
2329 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2331 ssl
->buf
[ssl
->used
].string
= str
;
2332 ssl
->buf
[ssl
->used
].string2
= str2
;
2333 ssl
->buf
[ssl
->used
].size
= size
;
2334 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2337 if (NILP (current_buffer
->enable_multibyte_characters
))
2338 nbytes
= XSTRING (str
)->size
;
2339 else if (! STRING_MULTIBYTE (str
))
2340 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2341 XSTRING (str
)->size_byte
);
2343 nbytes
= XSTRING (str
)->size_byte
;
2345 ssl
->bytes
+= nbytes
;
2349 if (NILP (current_buffer
->enable_multibyte_characters
))
2350 nbytes
= XSTRING (str2
)->size
;
2351 else if (! STRING_MULTIBYTE (str2
))
2352 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2353 XSTRING (str2
)->size_byte
);
2355 nbytes
= XSTRING (str2
)->size_byte
;
2357 ssl
->bytes
+= nbytes
;
2361 /* Return the concatenation of the strings associated with overlays that
2362 begin or end at POS, ignoring overlays that are specific to a window
2363 other than W. The strings are concatenated in the appropriate order:
2364 shorter overlays nest inside longer ones, and higher priority inside
2365 lower. Normally all of the after-strings come first, but zero-sized
2366 overlays have their after-strings ride along with the before-strings
2367 because it would look strange to print them inside-out.
2369 Returns the string length, and stores the contents indirectly through
2370 PSTR, if that variable is non-null. The string may be overwritten by
2371 subsequent calls. */
2374 overlay_strings (pos
, w
, pstr
)
2377 unsigned char **pstr
;
2379 Lisp_Object ov
, overlay
, window
, str
;
2380 int startpos
, endpos
;
2381 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2383 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2384 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2385 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2387 overlay
= XCONS (ov
)->car
;
2388 if (!OVERLAYP (overlay
))
2391 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2392 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2395 if (endpos
!= pos
&& startpos
!= pos
)
2397 window
= Foverlay_get (overlay
, Qwindow
);
2398 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2401 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2402 record_overlay_string (&overlay_heads
, str
,
2404 ? Foverlay_get (overlay
, Qafter_string
)
2406 Foverlay_get (overlay
, Qpriority
),
2408 else if (endpos
== pos
2409 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2410 record_overlay_string (&overlay_tails
, str
, Qnil
,
2411 Foverlay_get (overlay
, Qpriority
),
2414 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2416 overlay
= XCONS (ov
)->car
;
2417 if (!OVERLAYP (overlay
))
2420 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2421 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2424 if (endpos
!= pos
&& startpos
!= pos
)
2426 window
= Foverlay_get (overlay
, Qwindow
);
2427 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2430 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2431 record_overlay_string (&overlay_heads
, str
,
2433 ? Foverlay_get (overlay
, Qafter_string
)
2435 Foverlay_get (overlay
, Qpriority
),
2437 else if (endpos
== pos
2438 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2439 record_overlay_string (&overlay_tails
, str
, Qnil
,
2440 Foverlay_get (overlay
, Qpriority
),
2443 if (overlay_tails
.used
> 1)
2444 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2446 if (overlay_heads
.used
> 1)
2447 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2449 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2454 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2456 if (total
> overlay_str_len
)
2458 overlay_str_len
= total
;
2459 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2462 p
= overlay_str_buf
;
2463 for (i
= overlay_tails
.used
; --i
>= 0;)
2466 tem
= overlay_tails
.buf
[i
].string
;
2467 nbytes
= copy_text (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size_byte
,
2468 STRING_MULTIBYTE (tem
), multibyte
);
2471 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2474 tem
= overlay_heads
.buf
[i
].string
;
2475 nbytes
= copy_text (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size_byte
,
2476 STRING_MULTIBYTE (tem
), multibyte
);
2478 tem
= overlay_heads
.buf
[i
].string2
;
2481 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2482 XSTRING (tem
)->size_byte
,
2483 STRING_MULTIBYTE (tem
), multibyte
);
2487 if (p
!= overlay_str_buf
+ total
)
2490 *pstr
= overlay_str_buf
;
2496 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2499 recenter_overlay_lists (buf
, pos
)
2503 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2505 /* See if anything in overlays_before should move to overlays_after. */
2507 /* We don't strictly need prev in this loop; it should always be nil.
2508 But we use it for symmetry and in case that should cease to be true
2509 with some future change. */
2511 for (tail
= buf
->overlays_before
;
2513 prev
= tail
, tail
= next
)
2515 next
= XCONS (tail
)->cdr
;
2516 overlay
= XCONS (tail
)->car
;
2518 /* If the overlay is not valid, get rid of it. */
2519 if (!OVERLAY_VALID (overlay
))
2524 /* Splice the cons cell TAIL out of overlays_before. */
2526 XCONS (prev
)->cdr
= next
;
2528 buf
->overlays_before
= next
;
2534 beg
= OVERLAY_START (overlay
);
2535 end
= OVERLAY_END (overlay
);
2537 if (OVERLAY_POSITION (end
) > pos
)
2539 /* OVERLAY needs to be moved. */
2540 int where
= OVERLAY_POSITION (beg
);
2541 Lisp_Object other
, other_prev
;
2543 /* Splice the cons cell TAIL out of overlays_before. */
2545 XCONS (prev
)->cdr
= next
;
2547 buf
->overlays_before
= next
;
2549 /* Search thru overlays_after for where to put it. */
2551 for (other
= buf
->overlays_after
;
2553 other_prev
= other
, other
= XCONS (other
)->cdr
)
2555 Lisp_Object otherbeg
, otheroverlay
, follower
;
2558 otheroverlay
= XCONS (other
)->car
;
2559 if (! OVERLAY_VALID (otheroverlay
))
2562 otherbeg
= OVERLAY_START (otheroverlay
);
2563 if (OVERLAY_POSITION (otherbeg
) >= where
)
2567 /* Add TAIL to overlays_after before OTHER. */
2568 XCONS (tail
)->cdr
= other
;
2569 if (!NILP (other_prev
))
2570 XCONS (other_prev
)->cdr
= tail
;
2572 buf
->overlays_after
= tail
;
2576 /* We've reached the things that should stay in overlays_before.
2577 All the rest of overlays_before must end even earlier,
2582 /* See if anything in overlays_after should be in overlays_before. */
2584 for (tail
= buf
->overlays_after
;
2586 prev
= tail
, tail
= next
)
2588 next
= XCONS (tail
)->cdr
;
2589 overlay
= XCONS (tail
)->car
;
2591 /* If the overlay is not valid, get rid of it. */
2592 if (!OVERLAY_VALID (overlay
))
2597 /* Splice the cons cell TAIL out of overlays_after. */
2599 XCONS (prev
)->cdr
= next
;
2601 buf
->overlays_after
= next
;
2607 beg
= OVERLAY_START (overlay
);
2608 end
= OVERLAY_END (overlay
);
2610 /* Stop looking, when we know that nothing further
2611 can possibly end before POS. */
2612 if (OVERLAY_POSITION (beg
) > pos
)
2615 if (OVERLAY_POSITION (end
) <= pos
)
2617 /* OVERLAY needs to be moved. */
2618 int where
= OVERLAY_POSITION (end
);
2619 Lisp_Object other
, other_prev
;
2621 /* Splice the cons cell TAIL out of overlays_after. */
2623 XCONS (prev
)->cdr
= next
;
2625 buf
->overlays_after
= next
;
2627 /* Search thru overlays_before for where to put it. */
2629 for (other
= buf
->overlays_before
;
2631 other_prev
= other
, other
= XCONS (other
)->cdr
)
2633 Lisp_Object otherend
, otheroverlay
;
2636 otheroverlay
= XCONS (other
)->car
;
2637 if (! OVERLAY_VALID (otheroverlay
))
2640 otherend
= OVERLAY_END (otheroverlay
);
2641 if (OVERLAY_POSITION (otherend
) <= where
)
2645 /* Add TAIL to overlays_before before OTHER. */
2646 XCONS (tail
)->cdr
= other
;
2647 if (!NILP (other_prev
))
2648 XCONS (other_prev
)->cdr
= tail
;
2650 buf
->overlays_before
= tail
;
2655 XSETFASTINT (buf
->overlay_center
, pos
);
2659 adjust_overlays_for_insert (pos
, length
)
2663 /* After an insertion, the lists are still sorted properly,
2664 but we may need to update the value of the overlay center. */
2665 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
2666 XSETFASTINT (current_buffer
->overlay_center
,
2667 XFASTINT (current_buffer
->overlay_center
) + length
);
2671 adjust_overlays_for_delete (pos
, length
)
2675 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
2676 /* The deletion was to our right. No change needed; the before- and
2677 after-lists are still consistent. */
2679 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
2680 /* The deletion was to our left. We need to adjust the center value
2681 to account for the change in position, but the lists are consistent
2682 given the new value. */
2683 XSETFASTINT (current_buffer
->overlay_center
,
2684 XFASTINT (current_buffer
->overlay_center
) - length
);
2686 /* We're right in the middle. There might be things on the after-list
2687 that now belong on the before-list. Recentering will move them,
2688 and also update the center point. */
2689 recenter_overlay_lists (current_buffer
, pos
);
2692 /* Fix up overlays that were garbled as a result of permuting markers
2693 in the range START through END. Any overlay with at least one
2694 endpoint in this range will need to be unlinked from the overlay
2695 list and reinserted in its proper place.
2696 Such an overlay might even have negative size at this point.
2697 If so, we'll reverse the endpoints. Can you think of anything
2698 better to do in this situation? */
2700 fix_overlays_in_range (start
, end
)
2701 register int start
, end
;
2703 Lisp_Object tem
, overlay
;
2704 Lisp_Object before_list
, after_list
;
2705 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
2706 int startpos
, endpos
;
2708 /* This algorithm shifts links around instead of consing and GCing.
2709 The loop invariant is that before_list (resp. after_list) is a
2710 well-formed list except that its last element, the one that
2711 *pbefore (resp. *pafter) points to, is still uninitialized.
2712 So it's not a bug that before_list isn't initialized, although
2713 it may look strange. */
2714 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
2716 overlay
= XCONS (*ptail
)->car
;
2717 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2720 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2722 || (startpos
>= start
&& startpos
< end
))
2724 /* If the overlay is backwards, fix that now. */
2725 if (startpos
> endpos
)
2728 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2730 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2732 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2734 /* Add it to the end of the wrong list. Later on,
2735 recenter_overlay_lists will move it to the right place. */
2736 if (endpos
< XINT (current_buffer
->overlay_center
))
2739 pafter
= &XCONS (*ptail
)->cdr
;
2744 pbefore
= &XCONS (*ptail
)->cdr
;
2746 *ptail
= XCONS (*ptail
)->cdr
;
2749 ptail
= &XCONS (*ptail
)->cdr
;
2751 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
2753 overlay
= XCONS (*ptail
)->car
;
2754 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2755 if (startpos
>= end
)
2757 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2758 if (startpos
>= start
2759 || (endpos
>= start
&& endpos
< end
))
2761 if (startpos
> endpos
)
2764 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2766 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2768 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2770 if (endpos
< XINT (current_buffer
->overlay_center
))
2773 pafter
= &XCONS (*ptail
)->cdr
;
2778 pbefore
= &XCONS (*ptail
)->cdr
;
2780 *ptail
= XCONS (*ptail
)->cdr
;
2783 ptail
= &XCONS (*ptail
)->cdr
;
2786 /* Splice the constructed (wrong) lists into the buffer's lists,
2787 and let the recenter function make it sane again. */
2788 *pbefore
= current_buffer
->overlays_before
;
2789 current_buffer
->overlays_before
= before_list
;
2790 recenter_overlay_lists (current_buffer
,
2791 XINT (current_buffer
->overlay_center
));
2793 *pafter
= current_buffer
->overlays_after
;
2794 current_buffer
->overlays_after
= after_list
;
2795 recenter_overlay_lists (current_buffer
,
2796 XINT (current_buffer
->overlay_center
));
2799 /* We have two types of overlay: the one whose ending marker is
2800 after-insertion-marker (this is the usual case) and the one whose
2801 ending marker is before-insertion-marker. When `overlays_before'
2802 contains overlays of the latter type and the former type in this
2803 order and both overlays end at inserting position, inserting a text
2804 increases only the ending marker of the latter type, which results
2805 in incorrect ordering of `overlays_before'.
2807 This function fixes ordering of overlays in the slot
2808 `overlays_before' of the buffer *BP. Before the insertion, `point'
2809 was at PREV, and now is at POS. */
2812 fix_overlays_before (bp
, prev
, pos
)
2816 Lisp_Object
*tailp
= &bp
->overlays_before
;
2817 Lisp_Object
*right_place
;
2820 /* After the insertion, the several overlays may be in incorrect
2821 order. The possibility is that, in the list `overlays_before',
2822 an overlay which ends at POS appears after an overlay which ends
2823 at PREV. Since POS is greater than PREV, we must fix the
2824 ordering of these overlays, by moving overlays ends at POS before
2825 the overlays ends at PREV. */
2827 /* At first, find a place where disordered overlays should be linked
2828 in. It is where an overlay which end before POS exists. (i.e. an
2829 overlay whose ending marker is after-insertion-marker if disorder
2831 while (!NILP (*tailp
)
2832 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
)))
2834 tailp
= &XCONS (*tailp
)->cdr
;
2836 /* If we don't find such an overlay,
2837 or the found one ends before PREV,
2838 or the found one is the last one in the list,
2839 we don't have to fix anything. */
2842 || NILP (XCONS (*tailp
)->cdr
))
2845 right_place
= tailp
;
2846 tailp
= &XCONS (*tailp
)->cdr
;
2848 /* Now, end position of overlays in the list *TAILP should be before
2849 or equal to PREV. In the loop, an overlay which ends at POS is
2850 moved ahead to the place pointed by RIGHT_PLACE. If we found an
2851 overlay which ends before PREV, the remaining overlays are in
2853 while (!NILP (*tailp
))
2855 end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
));
2858 { /* This overlay is disordered. */
2859 Lisp_Object found
= *tailp
;
2861 /* Unlink the found overlay. */
2862 *tailp
= XCONS (found
)->cdr
;
2863 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
2864 XCONS (found
)->cdr
= *right_place
;
2865 /* Link it into the right place. */
2866 *right_place
= found
;
2868 else if (end
== prev
)
2869 tailp
= &XCONS (*tailp
)->cdr
;
2870 else /* No more disordered overlay. */
2875 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
2876 "Return t if OBJECT is an overlay.")
2880 return (OVERLAYP (object
) ? Qt
: Qnil
);
2883 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
2884 "Create a new overlay with range BEG to END in BUFFER.\n\
2885 If omitted, BUFFER defaults to the current buffer.\n\
2886 BEG and END may be integers or markers.\n\
2887 The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\
2888 front delimiter advance when text is inserted there.\n\
2889 The fifth arg REAR-ADVANCE, if non-nil, makes the\n\
2890 rear delimiter advance when text is inserted there.")
2891 (beg
, end
, buffer
, front_advance
, rear_advance
)
2892 Lisp_Object beg
, end
, buffer
;
2893 Lisp_Object front_advance
, rear_advance
;
2895 Lisp_Object overlay
;
2899 XSETBUFFER (buffer
, current_buffer
);
2901 CHECK_BUFFER (buffer
, 2);
2903 && ! EQ (Fmarker_buffer (beg
), buffer
))
2904 error ("Marker points into wrong buffer");
2906 && ! EQ (Fmarker_buffer (end
), buffer
))
2907 error ("Marker points into wrong buffer");
2909 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
2910 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2912 if (XINT (beg
) > XINT (end
))
2915 temp
= beg
; beg
= end
; end
= temp
;
2918 b
= XBUFFER (buffer
);
2920 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
2921 end
= Fset_marker (Fmake_marker (), end
, buffer
);
2923 if (!NILP (front_advance
))
2924 XMARKER (beg
)->insertion_type
= 1;
2925 if (!NILP (rear_advance
))
2926 XMARKER (end
)->insertion_type
= 1;
2928 overlay
= allocate_misc ();
2929 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
2930 XOVERLAY (overlay
)->start
= beg
;
2931 XOVERLAY (overlay
)->end
= end
;
2932 XOVERLAY (overlay
)->plist
= Qnil
;
2934 /* Put the new overlay on the wrong list. */
2935 end
= OVERLAY_END (overlay
);
2936 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
2937 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
2939 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
2941 /* This puts it in the right list, and in the right order. */
2942 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
2944 /* We don't need to redisplay the region covered by the overlay, because
2945 the overlay has no properties at the moment. */
2950 /* Mark a section of BUF as needing redisplay because of overlays changes. */
2953 modify_overlay (buf
, start
, end
)
2963 start
= end
; end
= temp
;
2966 /* If this is a buffer not in the selected window,
2967 we must do other windows. */
2968 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
2969 windows_or_buffers_changed
= 1;
2970 /* If it's not current, we can't use beg_unchanged, end_unchanged for it. */
2971 else if (buf
!= current_buffer
)
2972 windows_or_buffers_changed
= 1;
2973 /* If multiple windows show this buffer, we must do other windows. */
2974 else if (buffer_shared
> 1)
2975 windows_or_buffers_changed
= 1;
2978 if (unchanged_modified
== MODIFF
2979 && overlay_unchanged_modified
== OVERLAY_MODIFF
)
2981 beg_unchanged
= start
- BEG
;
2982 end_unchanged
= Z
- end
;
2986 if (Z
- end
< end_unchanged
)
2987 end_unchanged
= Z
- end
;
2988 if (start
- BEG
< beg_unchanged
)
2989 beg_unchanged
= start
- BEG
;
2993 ++BUF_OVERLAY_MODIFF (buf
);
2997 Lisp_Object
Fdelete_overlay ();
2999 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3000 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
3001 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
3002 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
3004 (overlay
, beg
, end
, buffer
)
3005 Lisp_Object overlay
, beg
, end
, buffer
;
3007 struct buffer
*b
, *ob
;
3008 Lisp_Object obuffer
;
3009 int count
= specpdl_ptr
- specpdl
;
3011 CHECK_OVERLAY (overlay
, 0);
3013 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3015 XSETBUFFER (buffer
, current_buffer
);
3016 CHECK_BUFFER (buffer
, 3);
3019 && ! EQ (Fmarker_buffer (beg
), buffer
))
3020 error ("Marker points into wrong buffer");
3022 && ! EQ (Fmarker_buffer (end
), buffer
))
3023 error ("Marker points into wrong buffer");
3025 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3026 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3028 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3029 return Fdelete_overlay (overlay
);
3031 if (XINT (beg
) > XINT (end
))
3034 temp
= beg
; beg
= end
; end
= temp
;
3037 specbind (Qinhibit_quit
, Qt
);
3039 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3040 b
= XBUFFER (buffer
);
3041 ob
= XBUFFER (obuffer
);
3043 /* If the overlay has changed buffers, do a thorough redisplay. */
3044 if (!EQ (buffer
, obuffer
))
3046 /* Redisplay where the overlay was. */
3047 if (!NILP (obuffer
))
3052 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3053 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3055 modify_overlay (ob
, o_beg
, o_end
);
3058 /* Redisplay where the overlay is going to be. */
3059 modify_overlay (b
, XINT (beg
), XINT (end
));
3062 /* Redisplay the area the overlay has just left, or just enclosed. */
3065 int change_beg
, change_end
;
3067 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3068 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3070 if (o_beg
== XINT (beg
))
3071 modify_overlay (b
, o_end
, XINT (end
));
3072 else if (o_end
== XINT (end
))
3073 modify_overlay (b
, o_beg
, XINT (beg
));
3076 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3077 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3078 modify_overlay (b
, o_beg
, o_end
);
3082 if (!NILP (obuffer
))
3084 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3085 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3088 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3089 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3091 /* Put the overlay on the wrong list. */
3092 end
= OVERLAY_END (overlay
);
3093 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3094 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3096 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3098 /* This puts it in the right list, and in the right order. */
3099 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3101 return unbind_to (count
, overlay
);
3104 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3105 "Delete the overlay OVERLAY from its buffer.")
3107 Lisp_Object overlay
;
3111 int count
= specpdl_ptr
- specpdl
;
3113 CHECK_OVERLAY (overlay
, 0);
3115 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3119 b
= XBUFFER (buffer
);
3121 specbind (Qinhibit_quit
, Qt
);
3123 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3124 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3127 marker_position (OVERLAY_START (overlay
)),
3128 marker_position (OVERLAY_END (overlay
)));
3130 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3131 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3133 return unbind_to (count
, Qnil
);
3136 /* Overlay dissection functions. */
3138 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3139 "Return the position at which OVERLAY starts.")
3141 Lisp_Object overlay
;
3143 CHECK_OVERLAY (overlay
, 0);
3145 return (Fmarker_position (OVERLAY_START (overlay
)));
3148 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3149 "Return the position at which OVERLAY ends.")
3151 Lisp_Object overlay
;
3153 CHECK_OVERLAY (overlay
, 0);
3155 return (Fmarker_position (OVERLAY_END (overlay
)));
3158 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3159 "Return the buffer OVERLAY belongs to.")
3161 Lisp_Object overlay
;
3163 CHECK_OVERLAY (overlay
, 0);
3165 return Fmarker_buffer (OVERLAY_START (overlay
));
3168 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3169 "Return a list of the properties on OVERLAY.\n\
3170 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
3173 Lisp_Object overlay
;
3175 CHECK_OVERLAY (overlay
, 0);
3177 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3181 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3182 "Return a list of the overlays that contain position POS.")
3187 Lisp_Object
*overlay_vec
;
3191 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3194 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3196 /* Put all the overlays we want in a vector in overlay_vec.
3197 Store the length in len. */
3198 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3199 (int *) 0, (int *) 0);
3201 /* Make a list of them all. */
3202 result
= Flist (noverlays
, overlay_vec
);
3204 xfree (overlay_vec
);
3208 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3209 "Return a list of the overlays that overlap the region BEG ... END.\n\
3210 Overlap means that at least one character is contained within the overlay\n\
3211 and also contained within the specified region.\n\
3212 Empty overlays are included in the result if they are located at BEG\n\
3213 or between BEG and END.")
3215 Lisp_Object beg
, end
;
3218 Lisp_Object
*overlay_vec
;
3222 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
3223 CHECK_NUMBER_COERCE_MARKER (end
, 0);
3226 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3228 /* Put all the overlays we want in a vector in overlay_vec.
3229 Store the length in len. */
3230 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3231 (int *) 0, (int *) 0);
3233 /* Make a list of them all. */
3234 result
= Flist (noverlays
, overlay_vec
);
3236 xfree (overlay_vec
);
3240 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3242 "Return the next position after POS where an overlay starts or ends.\n\
3243 If there are no more overlay boundaries after POS, return (point-max).")
3249 Lisp_Object
*overlay_vec
;
3253 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3256 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3258 /* Put all the overlays we want in a vector in overlay_vec.
3259 Store the length in len.
3260 endpos gets the position where the next overlay starts. */
3261 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3262 &endpos
, (int *) 0);
3264 /* If any of these overlays ends before endpos,
3265 use its ending point instead. */
3266 for (i
= 0; i
< noverlays
; i
++)
3271 oend
= OVERLAY_END (overlay_vec
[i
]);
3272 oendpos
= OVERLAY_POSITION (oend
);
3273 if (oendpos
< endpos
)
3277 xfree (overlay_vec
);
3278 return make_number (endpos
);
3281 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3282 Sprevious_overlay_change
, 1, 1, 0,
3283 "Return the previous position before POS where an overlay starts or ends.\n\
3284 If there are no more overlay boundaries before POS, return (point-min).")
3290 Lisp_Object
*overlay_vec
;
3295 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3298 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3300 /* At beginning of buffer, we know the answer;
3301 avoid bug subtracting 1 below. */
3302 if (XINT (pos
) == BEGV
)
3305 /* Put all the overlays we want in a vector in overlay_vec.
3306 Store the length in len.
3307 prevpos gets the position of an overlay end. */
3308 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3309 (int *) 0, &prevpos
);
3311 /* If any of these overlays starts after prevpos,
3312 maybe use its starting point instead. */
3313 for (i
= 0; i
< noverlays
; i
++)
3318 ostart
= OVERLAY_START (overlay_vec
[i
]);
3319 ostartpos
= OVERLAY_POSITION (ostart
);
3320 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
3321 prevpos
= ostartpos
;
3324 /* If any overlay ends at pos, consider its starting point too. */
3325 for (tail
= current_buffer
->overlays_before
;
3327 tail
= XCONS (tail
)->cdr
)
3329 Lisp_Object overlay
, ostart
;
3332 overlay
= XCONS (tail
)->car
;
3334 ostart
= OVERLAY_START (overlay
);
3335 ostartpos
= OVERLAY_POSITION (ostart
);
3336 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
3337 prevpos
= ostartpos
;
3340 xfree (overlay_vec
);
3341 return make_number (prevpos
);
3344 /* These functions are for debugging overlays. */
3346 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3347 "Return a pair of lists giving all the overlays of the current buffer.\n\
3348 The car has all the overlays before the overlay center;\n\
3349 the cdr has all the overlays after the overlay center.\n\
3350 Recentering overlays moves overlays between these lists.\n\
3351 The lists you get are copies, so that changing them has no effect.\n\
3352 However, the overlays you get are the real objects that the buffer uses.")
3355 Lisp_Object before
, after
;
3356 before
= current_buffer
->overlays_before
;
3358 before
= Fcopy_sequence (before
);
3359 after
= current_buffer
->overlays_after
;
3361 after
= Fcopy_sequence (after
);
3363 return Fcons (before
, after
);
3366 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3367 "Recenter the overlays of the current buffer around position POS.")
3371 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3373 recenter_overlay_lists (current_buffer
, XINT (pos
));
3377 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3378 "Get the property of overlay OVERLAY with property name PROP.")
3380 Lisp_Object overlay
, prop
;
3382 Lisp_Object plist
, fallback
;
3384 CHECK_OVERLAY (overlay
, 0);
3388 for (plist
= XOVERLAY (overlay
)->plist
;
3389 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
3390 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
3392 if (EQ (XCONS (plist
)->car
, prop
))
3393 return XCONS (XCONS (plist
)->cdr
)->car
;
3394 else if (EQ (XCONS (plist
)->car
, Qcategory
))
3397 tem
= Fcar (Fcdr (plist
));
3399 fallback
= Fget (tem
, prop
);
3406 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3407 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
3408 (overlay
, prop
, value
)
3409 Lisp_Object overlay
, prop
, value
;
3411 Lisp_Object tail
, buffer
;
3414 CHECK_OVERLAY (overlay
, 0);
3416 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3418 for (tail
= XOVERLAY (overlay
)->plist
;
3419 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
3420 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
3421 if (EQ (XCONS (tail
)->car
, prop
))
3423 changed
= !EQ (XCONS (XCONS (tail
)->cdr
)->car
, value
);
3424 XCONS (XCONS (tail
)->cdr
)->car
= value
;
3427 /* It wasn't in the list, so add it to the front. */
3428 changed
= !NILP (value
);
3429 XOVERLAY (overlay
)->plist
3430 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3432 if (! NILP (buffer
))
3435 modify_overlay (XBUFFER (buffer
),
3436 marker_position (OVERLAY_START (overlay
)),
3437 marker_position (OVERLAY_END (overlay
)));
3438 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3439 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3440 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3441 Fdelete_overlay (overlay
);
3446 /* Subroutine of report_overlay_modification. */
3448 /* Lisp vector holding overlay hook functions to call.
3449 Vector elements come in pairs.
3450 Each even-index element is a list of hook functions.
3451 The following odd-index element is the overlay they came from.
3453 Before the buffer change, we fill in this vector
3454 as we call overlay hook functions.
3455 After the buffer change, we get the functions to call from this vector.
3456 This way we always call the same functions before and after the change. */
3457 static Lisp_Object last_overlay_modification_hooks
;
3459 /* Number of elements actually used in last_overlay_modification_hooks. */
3460 static int last_overlay_modification_hooks_used
;
3462 /* Add one functionlist/overlay pair
3463 to the end of last_overlay_modification_hooks. */
3466 add_overlay_mod_hooklist (functionlist
, overlay
)
3467 Lisp_Object functionlist
, overlay
;
3469 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3471 if (last_overlay_modification_hooks_used
== oldsize
)
3474 old
= last_overlay_modification_hooks
;
3475 last_overlay_modification_hooks
3476 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3477 bcopy (XVECTOR (old
)->contents
,
3478 XVECTOR (last_overlay_modification_hooks
)->contents
,
3479 sizeof (Lisp_Object
) * oldsize
);
3481 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3482 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3485 /* Run the modification-hooks of overlays that include
3486 any part of the text in START to END.
3487 If this change is an insertion, also
3488 run the insert-before-hooks of overlay starting at END,
3489 and the insert-after-hooks of overlay ending at START.
3491 This is called both before and after the modification.
3492 AFTER is nonzero when we call after the modification.
3494 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3495 When AFTER is nonzero, they are the start position,
3496 the position after the inserted new text,
3497 and the length of deleted or replaced old text. */
3500 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3501 Lisp_Object start
, end
;
3503 Lisp_Object arg1
, arg2
, arg3
;
3505 Lisp_Object prop
, overlay
, tail
;
3506 /* 1 if this change is an insertion. */
3507 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3509 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3513 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3517 /* Call the functions recorded in last_overlay_modification_hooks
3518 rather than scanning the overlays again.
3519 First copy the vector contents, in case some of these hooks
3520 do subsequent modification of the buffer. */
3521 int size
= last_overlay_modification_hooks_used
;
3522 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3525 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3526 copy
, size
* sizeof (Lisp_Object
));
3528 gcpro1
.nvars
= size
;
3530 for (i
= 0; i
< size
;)
3532 Lisp_Object prop
, overlay
;
3534 overlay
= copy
[i
++];
3535 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3541 /* We are being called before a change.
3542 Scan the overlays to find the functions to call. */
3543 last_overlay_modification_hooks_used
= 0;
3545 for (tail
= current_buffer
->overlays_before
;
3547 tail
= XCONS (tail
)->cdr
)
3549 int startpos
, endpos
;
3550 Lisp_Object ostart
, oend
;
3552 overlay
= XCONS (tail
)->car
;
3554 ostart
= OVERLAY_START (overlay
);
3555 oend
= OVERLAY_END (overlay
);
3556 endpos
= OVERLAY_POSITION (oend
);
3557 if (XFASTINT (start
) > endpos
)
3559 startpos
= OVERLAY_POSITION (ostart
);
3560 if (insertion
&& (XFASTINT (start
) == startpos
3561 || XFASTINT (end
) == startpos
))
3563 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3566 /* Copy TAIL in case the hook recenters the overlay lists. */
3568 tail
= Fcopy_sequence (tail
);
3570 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3573 if (insertion
&& (XFASTINT (start
) == endpos
3574 || XFASTINT (end
) == endpos
))
3576 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3580 tail
= Fcopy_sequence (tail
);
3582 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3585 /* Test for intersecting intervals. This does the right thing
3586 for both insertion and deletion. */
3587 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3589 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3593 tail
= Fcopy_sequence (tail
);
3595 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3601 for (tail
= current_buffer
->overlays_after
;
3603 tail
= XCONS (tail
)->cdr
)
3605 int startpos
, endpos
;
3606 Lisp_Object ostart
, oend
;
3608 overlay
= XCONS (tail
)->car
;
3610 ostart
= OVERLAY_START (overlay
);
3611 oend
= OVERLAY_END (overlay
);
3612 startpos
= OVERLAY_POSITION (ostart
);
3613 endpos
= OVERLAY_POSITION (oend
);
3614 if (XFASTINT (end
) < startpos
)
3616 if (insertion
&& (XFASTINT (start
) == startpos
3617 || XFASTINT (end
) == startpos
))
3619 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3623 tail
= Fcopy_sequence (tail
);
3625 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3628 if (insertion
&& (XFASTINT (start
) == endpos
3629 || XFASTINT (end
) == endpos
))
3631 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3635 tail
= Fcopy_sequence (tail
);
3637 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3640 /* Test for intersecting intervals. This does the right thing
3641 for both insertion and deletion. */
3642 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3644 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3648 tail
= Fcopy_sequence (tail
);
3650 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3659 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
3660 Lisp_Object list
, overlay
;
3662 Lisp_Object arg1
, arg2
, arg3
;
3664 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3666 GCPRO4 (list
, arg1
, arg2
, arg3
);
3668 add_overlay_mod_hooklist (list
, overlay
);
3670 while (!NILP (list
))
3673 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
3675 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
3681 /* Delete any zero-sized overlays at position POS, if the `evaporate'
3684 evaporate_overlays (pos
)
3687 Lisp_Object tail
, overlay
, hit_list
;
3690 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
3691 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
3692 tail
= XCONS (tail
)->cdr
)
3695 overlay
= XCONS (tail
)->car
;
3696 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3699 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
3700 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3701 hit_list
= Fcons (overlay
, hit_list
);
3704 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
3705 tail
= XCONS (tail
)->cdr
)
3708 overlay
= XCONS (tail
)->car
;
3709 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3712 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
3713 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3714 hit_list
= Fcons (overlay
, hit_list
);
3716 for (; CONSP (hit_list
); hit_list
= XCONS (hit_list
)->cdr
)
3717 Fdelete_overlay (XCONS (hit_list
)->car
);
3720 /* Somebody has tried to store a value with an unacceptable type
3721 into the buffer-local slot with offset OFFSET. */
3723 buffer_slot_type_mismatch (offset
)
3728 sym
= *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
);
3729 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
3731 case Lisp_Int
: type_name
= "integers"; break;
3732 case Lisp_String
: type_name
= "strings"; break;
3733 case Lisp_Symbol
: type_name
= "symbols"; break;
3738 error ("only %s should be stored in the buffer-local variable %s",
3739 type_name
, XSYMBOL (sym
)->name
->data
);
3744 register Lisp_Object tem
;
3746 buffer_permanent_local_flags
= 0;
3748 /* Make sure all markable slots in buffer_defaults
3749 are initialized reasonably, so mark_buffer won't choke. */
3750 reset_buffer (&buffer_defaults
);
3751 reset_buffer_local_variables (&buffer_defaults
, 1);
3752 reset_buffer (&buffer_local_symbols
);
3753 reset_buffer_local_variables (&buffer_local_symbols
, 1);
3754 /* Prevent GC from getting confused. */
3755 buffer_defaults
.text
= &buffer_defaults
.own_text
;
3756 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
3757 #ifdef USE_TEXT_PROPERTIES
3758 BUF_INTERVALS (&buffer_defaults
) = 0;
3759 BUF_INTERVALS (&buffer_local_symbols
) = 0;
3761 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
3762 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
3764 /* Set up the default values of various buffer slots. */
3765 /* Must do these before making the first buffer! */
3767 /* real setup is done in loaddefs.el */
3768 buffer_defaults
.mode_line_format
= build_string ("%-");
3769 buffer_defaults
.abbrev_mode
= Qnil
;
3770 buffer_defaults
.overwrite_mode
= Qnil
;
3771 buffer_defaults
.case_fold_search
= Qt
;
3772 buffer_defaults
.auto_fill_function
= Qnil
;
3773 buffer_defaults
.selective_display
= Qnil
;
3775 buffer_defaults
.selective_display_ellipses
= Qt
;
3777 buffer_defaults
.abbrev_table
= Qnil
;
3778 buffer_defaults
.display_table
= Qnil
;
3779 buffer_defaults
.undo_list
= Qnil
;
3780 buffer_defaults
.mark_active
= Qnil
;
3781 buffer_defaults
.file_format
= Qnil
;
3782 buffer_defaults
.overlays_before
= Qnil
;
3783 buffer_defaults
.overlays_after
= Qnil
;
3784 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
3786 XSETFASTINT (buffer_defaults
.tab_width
, 8);
3787 buffer_defaults
.truncate_lines
= Qnil
;
3788 buffer_defaults
.ctl_arrow
= Qt
;
3789 buffer_defaults
.direction_reversed
= Qnil
;
3792 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
3794 buffer_defaults
.enable_multibyte_characters
= Qt
;
3795 buffer_defaults
.buffer_file_coding_system
= Qnil
;
3796 XSETFASTINT (buffer_defaults
.fill_column
, 70);
3797 XSETFASTINT (buffer_defaults
.left_margin
, 0);
3798 buffer_defaults
.cache_long_line_scans
= Qnil
;
3799 buffer_defaults
.file_truename
= Qnil
;
3800 XSETFASTINT (buffer_defaults
.display_count
, 0);
3802 /* Assign the local-flags to the slots that have default values.
3803 The local flag is a bit that is used in the buffer
3804 to say that it has its own local value for the slot.
3805 The local flag bits are in the local_var_flags slot of the buffer. */
3807 /* Nothing can work if this isn't true */
3808 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
3810 /* 0 means not a lisp var, -1 means always local, else mask */
3811 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
3812 XSETINT (buffer_local_flags
.filename
, -1);
3813 XSETINT (buffer_local_flags
.directory
, -1);
3814 XSETINT (buffer_local_flags
.backed_up
, -1);
3815 XSETINT (buffer_local_flags
.save_length
, -1);
3816 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
3817 XSETINT (buffer_local_flags
.read_only
, -1);
3818 XSETINT (buffer_local_flags
.major_mode
, -1);
3819 XSETINT (buffer_local_flags
.mode_name
, -1);
3820 XSETINT (buffer_local_flags
.undo_list
, -1);
3821 XSETINT (buffer_local_flags
.mark_active
, -1);
3822 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
3823 XSETINT (buffer_local_flags
.file_truename
, -1);
3824 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
3825 XSETINT (buffer_local_flags
.file_format
, -1);
3826 XSETINT (buffer_local_flags
.display_count
, -1);
3828 XSETFASTINT (buffer_local_flags
.mode_line_format
, 1);
3829 XSETFASTINT (buffer_local_flags
.abbrev_mode
, 2);
3830 XSETFASTINT (buffer_local_flags
.overwrite_mode
, 4);
3831 XSETFASTINT (buffer_local_flags
.case_fold_search
, 8);
3832 XSETFASTINT (buffer_local_flags
.auto_fill_function
, 0x10);
3833 XSETFASTINT (buffer_local_flags
.selective_display
, 0x20);
3835 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, 0x40);
3837 XSETFASTINT (buffer_local_flags
.tab_width
, 0x80);
3838 XSETFASTINT (buffer_local_flags
.truncate_lines
, 0x100);
3839 XSETFASTINT (buffer_local_flags
.ctl_arrow
, 0x200);
3840 XSETFASTINT (buffer_local_flags
.fill_column
, 0x400);
3841 XSETFASTINT (buffer_local_flags
.left_margin
, 0x800);
3842 XSETFASTINT (buffer_local_flags
.abbrev_table
, 0x1000);
3843 XSETFASTINT (buffer_local_flags
.display_table
, 0x2000);
3845 XSETFASTINT (buffer_local_flags
.buffer_file_type
, 0x4000);
3846 /* Make this one a permanent local. */
3847 buffer_permanent_local_flags
|= 0x4000;
3849 XSETFASTINT (buffer_local_flags
.syntax_table
, 0x8000);
3850 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, 0x10000);
3851 XSETFASTINT (buffer_local_flags
.category_table
, 0x20000);
3852 XSETFASTINT (buffer_local_flags
.direction_reversed
, 0x40000);
3853 XSETFASTINT (buffer_local_flags
.enable_multibyte_characters
, 0x80000);
3854 /* Make this one a permanent local. */
3855 buffer_permanent_local_flags
|= 0x80000;
3856 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, 0x100000);
3857 /* Make this one a permanent local. */
3858 buffer_permanent_local_flags
|= 0x100000;
3860 Vbuffer_alist
= Qnil
;
3864 QSFundamental
= build_string ("Fundamental");
3866 Qfundamental_mode
= intern ("fundamental-mode");
3867 buffer_defaults
.major_mode
= Qfundamental_mode
;
3869 Qmode_class
= intern ("mode-class");
3871 Qprotected_field
= intern ("protected-field");
3873 Qpermanent_local
= intern ("permanent-local");
3875 Qkill_buffer_hook
= intern ("kill-buffer-hook");
3877 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
3879 /* super-magic invisible buffer */
3880 Vbuffer_alist
= Qnil
;
3882 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3887 char buf
[MAXPATHLEN
+1];
3889 struct stat dotstat
, pwdstat
;
3893 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3895 /* If PWD is accurate, use it instead of calling getwd. This is faster
3896 when PWD is right, and may avoid a fatal error. */
3897 if ((pwd
= getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd
)
3898 && stat (pwd
, &pwdstat
) == 0
3899 && stat (".", &dotstat
) == 0
3900 && dotstat
.st_ino
== pwdstat
.st_ino
3901 && dotstat
.st_dev
== pwdstat
.st_dev
3902 && strlen (pwd
) < MAXPATHLEN
)
3905 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
3906 fatal ("`getcwd' failed: %s\n", strerror (errno
));
3908 else if (getwd (buf
) == 0)
3909 fatal ("`getwd' failed: %s\n", buf
);
3913 /* Maybe this should really use some standard subroutine
3914 whose definition is filename syntax dependent. */
3916 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
3918 buf
[rc
] = DIRECTORY_SEP
;
3921 #endif /* not VMS */
3923 current_buffer
->directory
= build_string (buf
);
3925 /* Add /: to the front of the name
3926 if it would otherwise be treated as magic. */
3927 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
3929 /* If the default dir is just /, TEMP is non-nil
3930 because of the ange-ftp completion handler.
3931 However, it is not necessary to turn / into /:/.
3932 So avoid doing that. */
3933 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
3934 current_buffer
->directory
3935 = concat2 (build_string ("/:"), current_buffer
->directory
);
3937 temp
= get_minibuffer (0);
3938 XBUFFER (temp
)->directory
= current_buffer
->directory
;
3941 /* initialize the buffer routines */
3944 extern Lisp_Object Qdisabled
;
3946 staticpro (&last_overlay_modification_hooks
);
3947 last_overlay_modification_hooks
3948 = Fmake_vector (make_number (10), Qnil
);
3950 staticpro (&Vbuffer_defaults
);
3951 staticpro (&Vbuffer_local_symbols
);
3952 staticpro (&Qfundamental_mode
);
3953 staticpro (&Qmode_class
);
3954 staticpro (&QSFundamental
);
3955 staticpro (&Vbuffer_alist
);
3956 staticpro (&Qprotected_field
);
3957 staticpro (&Qpermanent_local
);
3958 staticpro (&Qkill_buffer_hook
);
3959 Qoverlayp
= intern ("overlayp");
3960 staticpro (&Qoverlayp
);
3961 Qevaporate
= intern ("evaporate");
3962 staticpro (&Qevaporate
);
3963 Qmodification_hooks
= intern ("modification-hooks");
3964 staticpro (&Qmodification_hooks
);
3965 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
3966 staticpro (&Qinsert_in_front_hooks
);
3967 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
3968 staticpro (&Qinsert_behind_hooks
);
3969 Qget_file_buffer
= intern ("get-file-buffer");
3970 staticpro (&Qget_file_buffer
);
3971 Qpriority
= intern ("priority");
3972 staticpro (&Qpriority
);
3973 Qwindow
= intern ("window");
3974 staticpro (&Qwindow
);
3975 Qbefore_string
= intern ("before-string");
3976 staticpro (&Qbefore_string
);
3977 Qafter_string
= intern ("after-string");
3978 staticpro (&Qafter_string
);
3979 Qfirst_change_hook
= intern ("first-change-hook");
3980 staticpro (&Qfirst_change_hook
);
3981 Qbefore_change_functions
= intern ("before-change-functions");
3982 staticpro (&Qbefore_change_functions
);
3983 Qafter_change_functions
= intern ("after-change-functions");
3984 staticpro (&Qafter_change_functions
);
3986 Fput (Qprotected_field
, Qerror_conditions
,
3987 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
3988 Fput (Qprotected_field
, Qerror_message
,
3989 build_string ("Attempt to modify a protected field"));
3991 /* All these use DEFVAR_LISP_NOPRO because the slots in
3992 buffer_defaults will all be marked via Vbuffer_defaults. */
3994 DEFVAR_LISP_NOPRO ("default-mode-line-format",
3995 &buffer_defaults
.mode_line_format
,
3996 "Default value of `mode-line-format' for buffers that don't override it.\n\
3997 This is the same as (default-value 'mode-line-format).");
3999 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
4000 &buffer_defaults
.abbrev_mode
,
4001 "Default value of `abbrev-mode' for buffers that do not override it.\n\
4002 This is the same as (default-value 'abbrev-mode).");
4004 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
4005 &buffer_defaults
.ctl_arrow
,
4006 "Default value of `ctl-arrow' for buffers that do not override it.\n\
4007 This is the same as (default-value 'ctl-arrow).");
4009 DEFVAR_LISP_NOPRO ("default-direction-reversed",
4010 &buffer_defaults
.direction_reversed
,
4011 "Default value of `direction_reversed' for buffers that do not override it.\n\
4012 This is the same as (default-value 'direction-reversed).");
4014 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
4015 &buffer_defaults
.enable_multibyte_characters
,
4016 "Default value of `enable-multibyte-characters' for buffers not overriding it.\n\
4017 This is the same as (default-value 'enable-multibyte-characters).");
4019 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
4020 &buffer_defaults
.buffer_file_coding_system
,
4021 "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\
4022 This is the same as (default-value 'buffer-file-coding-system).");
4024 DEFVAR_LISP_NOPRO ("default-truncate-lines",
4025 &buffer_defaults
.truncate_lines
,
4026 "Default value of `truncate-lines' for buffers that do not override it.\n\
4027 This is the same as (default-value 'truncate-lines).");
4029 DEFVAR_LISP_NOPRO ("default-fill-column",
4030 &buffer_defaults
.fill_column
,
4031 "Default value of `fill-column' for buffers that do not override it.\n\
4032 This is the same as (default-value 'fill-column).");
4034 DEFVAR_LISP_NOPRO ("default-left-margin",
4035 &buffer_defaults
.left_margin
,
4036 "Default value of `left-margin' for buffers that do not override it.\n\
4037 This is the same as (default-value 'left-margin).");
4039 DEFVAR_LISP_NOPRO ("default-tab-width",
4040 &buffer_defaults
.tab_width
,
4041 "Default value of `tab-width' for buffers that do not override it.\n\
4042 This is the same as (default-value 'tab-width).");
4044 DEFVAR_LISP_NOPRO ("default-case-fold-search",
4045 &buffer_defaults
.case_fold_search
,
4046 "Default value of `case-fold-search' for buffers that don't override it.\n\
4047 This is the same as (default-value 'case-fold-search).");
4050 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
4051 &buffer_defaults
.buffer_file_type
,
4052 "Default file type for buffers that do not override it.\n\
4053 This is the same as (default-value 'buffer-file-type).\n\
4054 The file type is nil for text, t for binary.");
4057 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
4060 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
4061 But make-docfile finds it!
4062 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
4064 "Template for displaying mode line for current buffer.\n\
4065 Each buffer has its own value of this variable.\n\
4066 Value may be a string, a symbol or a list or cons cell.\n\
4067 For a symbol, its value is used (but it is ignored if t or nil).\n\
4068 A string appearing directly as the value of a symbol is processed verbatim\n\
4069 in that the %-constructs below are not recognized.\n\
4070 For a list whose car is a symbol, the symbol's value is taken,\n\
4071 and if that is non-nil, the cadr of the list is processed recursively.\n\
4072 Otherwise, the caddr of the list (if there is one) is processed.\n\
4073 For a list whose car is a string or list, each element is processed\n\
4074 recursively and the results are effectively concatenated.\n\
4075 For a list whose car is an integer, the cdr of the list is processed\n\
4076 and padded (if the number is positive) or truncated (if negative)\n\
4077 to the width specified by that number.\n\
4078 A string is printed verbatim in the mode line except for %-constructs:\n\
4079 (%-constructs are allowed when the string is the entire mode-line-format\n\
4080 or when it is found in a cons-cell or a list)\n\
4081 %b -- print buffer name. %f -- print visited file name.\n\
4082 %F -- print frame name.\n\
4083 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
4084 % means buffer is read-only and * means it is modified.\n\
4085 For a modified read-only buffer, %* gives % and %+ gives *.\n\
4086 %s -- print process status. %l -- print the current line number.\n\
4087 %c -- print the current column number (this makes editing slower).\n\
4088 To make the column number update correctly in all cases,\n\
4089 `column-number-mode' must be non-nil.\n\
4090 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
4091 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
4092 or print Bottom or All.\n\
4093 %n -- print Narrow if appropriate.\n\
4094 %t -- print T if file is text, B if binary.\n\
4095 %[ -- print one [ for each recursive editing level. %] similar.\n\
4096 %% -- print %. %- -- print infinitely many dashes.\n\
4097 Decimal digits after the % specify field width to which to pad.");
4100 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
4101 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
4102 nil here means use current buffer's major mode.");
4104 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
4105 make_number (Lisp_Symbol
),
4106 "Symbol for current buffer's major mode.");
4108 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
4109 make_number (Lisp_String
),
4110 "Pretty name of current buffer's major mode (a string).");
4112 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
4113 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
4114 Automatically becomes buffer-local when set in any fashion.");
4116 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
4118 "*Non-nil if searches should ignore case.\n\
4119 Automatically becomes buffer-local when set in any fashion.");
4121 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
4122 make_number (Lisp_Int
),
4123 "*Column beyond which automatic line-wrapping should happen.\n\
4124 Automatically becomes buffer-local when set in any fashion.");
4126 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
4127 make_number (Lisp_Int
),
4128 "*Column for the default indent-line-function to indent to.\n\
4129 Linefeed indents to this column in Fundamental mode.\n\
4130 Automatically becomes buffer-local when set in any fashion.");
4132 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
4133 make_number (Lisp_Int
),
4134 "*Distance between tab stops (for display of tab characters), in columns.\n\
4135 Automatically becomes buffer-local when set in any fashion.");
4137 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
4138 "*Non-nil means display control chars with uparrow.\n\
4139 A value of nil means use backslash and octal digits.\n\
4140 Automatically becomes buffer-local when set in any fashion.\n\
4141 This variable does not apply to characters whose display is specified\n\
4142 in the current display table (if there is one).");
4144 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
4145 ¤t_buffer
->enable_multibyte_characters
, Qnil
,
4146 "*Non-nil means the buffer contents are regarded as multi-byte form\n\
4147 of characters, not a binary code. This affects the display, file I/O,\n\
4148 and behaviors of various editing commands.");
4150 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
4151 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
4152 "Coding system to be used for encoding the buffer contents on saving.\n\
4153 If it is nil, the buffer is saved without any code conversion unless\n\
4154 some coding system is specified in file-coding-system-alist\n\
4155 for the buffer file.\n\
4157 This variable is never applied to a way of decoding\n\
4158 a file while reading it.");
4160 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
4162 "*Non-nil means lines in the buffer are displayed right to left.");
4164 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
4165 "*Non-nil means do not display continuation lines;\n\
4166 give each line of text one screen line.\n\
4167 Automatically becomes buffer-local when set in any fashion.\n\
4169 Note that this is overridden by the variable\n\
4170 `truncate-partial-width-windows' if that variable is non-nil\n\
4171 and this buffer is not full-frame width.");
4174 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
4176 "Non-nil if the visited file is a binary file.\n\
4177 This variable is meaningful on MS-DOG and Windows NT.\n\
4178 On those systems, it is automatically local in every buffer.\n\
4179 On other systems, this variable is normally always nil.");
4182 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
4183 make_number (Lisp_String
),
4184 "Name of default directory of current buffer. Should end with slash.\n\
4185 Each buffer has its own value of this variable.");
4187 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
4189 "Function called (if non-nil) to perform auto-fill.\n\
4190 It is called after self-inserting a space or newline.\n\
4191 Each buffer has its own value of this variable.\n\
4192 NOTE: This variable is not a hook;\n\
4193 its value may not be a list of functions.");
4195 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
4196 make_number (Lisp_String
),
4197 "Name of file visited in current buffer, or nil if not visiting a file.\n\
4198 Each buffer has its own value of this variable.");
4200 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
4201 make_number (Lisp_String
),
4202 "Abbreviated truename of file visited in current buffer, or nil if none.\n\
4203 The truename of a file is calculated by `file-truename'\n\
4204 and then abbreviated with `abbreviate-file-name'.\n\
4205 Each buffer has its own value of this variable.");
4207 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
4208 ¤t_buffer
->auto_save_file_name
,
4209 make_number (Lisp_String
),
4210 "Name of file for auto-saving current buffer,\n\
4211 or nil if buffer should not be auto-saved.\n\
4212 Each buffer has its own value of this variable.");
4214 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
4215 "Non-nil if this buffer is read-only.\n\
4216 Each buffer has its own value of this variable.");
4218 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
4219 "Non-nil if this buffer's file has been backed up.\n\
4220 Backing up is done before the first time the file is saved.\n\
4221 Each buffer has its own value of this variable.");
4223 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
4224 make_number (Lisp_Int
),
4225 "Length of current buffer when last read in, saved or auto-saved.\n\
4227 Each buffer has its own value of this variable.");
4229 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
4231 "Non-nil enables selective display:\n\
4232 Integer N as value means display only lines\n\
4233 that start with less than n columns of space.\n\
4234 A value of t means, after a ^M, all the rest of the line is invisible.\n\
4235 Then ^M's in the file are written into files as newlines.\n\n\
4236 Automatically becomes buffer-local when set in any fashion.");
4239 DEFVAR_PER_BUFFER ("selective-display-ellipses",
4240 ¤t_buffer
->selective_display_ellipses
,
4242 "t means display ... on previous line when a line is invisible.\n\
4243 Automatically becomes buffer-local when set in any fashion.");
4246 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
4247 "Non-nil if self-insertion should replace existing text.\n\
4248 The value should be one of `overwrite-mode-textual',\n\
4249 `overwrite-mode-binary', or nil.\n\
4250 If it is `overwrite-mode-textual', self-insertion still\n\
4251 inserts at the end of a line, and inserts when point is before a tab,\n\
4252 until the tab is filled in.\n\
4253 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
4254 Automatically becomes buffer-local when set in any fashion.");
4256 #if 0 /* The doc string is too long for some compilers,
4257 but make-docfile can find it in this comment. */
4258 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4260 "Display table that controls display of the contents of current buffer.\n\
4261 Automatically becomes buffer-local when set in any fashion.\n\
4262 The display table is a char-table created with `make-display-table'.\n\
4263 The ordinary char-table elements control how to display each possible text\n\
4264 character. Each value should be a vector of characters or nil;\n\
4265 nil means display the character in the default fashion.\n\
4266 There are six extra slots to control the display of\n\
4267 the end of a truncated screen line (extra-slot 0, a single character);\n\
4268 the end of a continued line (extra-slot 1, a single character);\n\
4269 the escape character used to display character codes in octal\n\
4270 (extra-slot 2, a single character);\n\
4271 the character used as an arrow for control characters (extra-slot 3,\n\
4272 a single character);\n\
4273 the decoration indicating the presence of invisible lines (extra-slot 4,\n\
4274 a vector of characters);\n\
4275 the character used to draw the border between side-by-side windows\n\
4276 (extra-slot 5, a single character).\n\
4277 See also the functions `display-table-slot' and `set-display-table-slot'.\n\
4278 If this variable is nil, the value of `standard-display-table' is used.\n\
4279 Each window can have its own, overriding display table.");
4281 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4284 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
4287 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
4288 "If non-nil, a function to call before each text change (obsolete).\n\
4289 Two arguments are passed to the function: the positions of\n\
4290 the beginning and end of the range of old text to be changed.\n\
4291 \(For an insertion, the beginning and end are at the same place.)\n\
4292 No information is given about the length of the text after the change.\n\
4294 Buffer changes made while executing the `before-change-function'\n\
4295 don't call any before-change or after-change functions.\n\
4296 That's because these variables are temporarily set to nil.\n\
4297 As a result, a hook function cannot straightforwardly alter the value of\n\
4298 these variables. See the Emacs Lisp manual for a way of\n\
4299 accomplishing an equivalent result by using other variables.\n\n\
4300 This variable is obsolete; use `before-change-functions' instead.");
4301 Vbefore_change_function
= Qnil
;
4303 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
4304 "If non-nil, a Function to call after each text change (obsolete).\n\
4305 Three arguments are passed to the function: the positions of\n\
4306 the beginning and end of the range of changed text,\n\
4307 and the length of the pre-change text replaced by that range.\n\
4308 \(For an insertion, the pre-change length is zero;\n\
4309 for a deletion, that length is the number of bytes deleted,\n\
4310 and the post-change beginning and end are at the same place.)\n\
4312 Buffer changes made while executing the `after-change-function'\n\
4313 don't call any before-change or after-change functions.\n\
4314 That's because these variables are temporarily set to nil.\n\
4315 As a result, a hook function cannot straightforwardly alter the value of\n\
4316 these variables. See the Emacs Lisp manual for a way of\n\
4317 accomplishing an equivalent result by using other variables.\n\n\
4318 This variable is obsolete; use `after-change-functions' instead.");
4319 Vafter_change_function
= Qnil
;
4321 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
4322 "List of functions to call before each text change.\n\
4323 Two arguments are passed to each function: the positions of\n\
4324 the beginning and end of the range of old text to be changed.\n\
4325 \(For an insertion, the beginning and end are at the same place.)\n\
4326 No information is given about the length of the text after the change.\n\
4328 Buffer changes made while executing the `before-change-functions'\n\
4329 don't call any before-change or after-change functions.\n\
4330 That's because these variables are temporarily set to nil.\n\
4331 As a result, a hook function cannot straightforwardly alter the value of\n\
4332 these variables. See the Emacs Lisp manual for a way of\n\
4333 accomplishing an equivalent result by using other variables.");
4334 Vbefore_change_functions
= Qnil
;
4336 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
4337 "List of function to call after each text change.\n\
4338 Three arguments are passed to each function: the positions of\n\
4339 the beginning and end of the range of changed text,\n\
4340 and the length in bytes of the pre-change text replaced by that range.\n\
4341 \(For an insertion, the pre-change length is zero;\n\
4342 for a deletion, that length is the number of bytes deleted,\n\
4343 and the post-change beginning and end are at the same place.)\n\
4345 Buffer changes made while executing the `after-change-functions'\n\
4346 don't call any before-change or after-change functions.\n\
4347 That's because these variables are temporarily set to nil.\n\
4348 As a result, a hook function cannot straightforwardly alter the value of\n\
4349 these variables. See the Emacs Lisp manual for a way of\n\
4350 accomplishing an equivalent result by using other variables.");
4352 Vafter_change_functions
= Qnil
;
4354 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
4355 "A list of functions to call before changing a buffer which is unmodified.\n\
4356 The functions are run using the `run-hooks' function.");
4357 Vfirst_change_hook
= Qnil
;
4359 #if 0 /* The doc string is too long for some compilers,
4360 but make-docfile can find it in this comment. */
4361 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4362 "List of undo entries in current buffer.\n\
4363 Recent changes come first; older changes follow newer.\n\
4365 An entry (BEG . END) represents an insertion which begins at\n\
4366 position BEG and ends at position END.\n\
4368 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
4369 from (abs POSITION). If POSITION is positive, point was at the front\n\
4370 of the text being deleted; if negative, point was at the end.\n\
4372 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
4373 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
4374 of the visited file's modification time, as of that time. If the\n\
4375 modification time of the most recent save is different, this entry is\n\
4378 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
4379 was modified between BEG and END. PROPERTY is the property name,\n\
4380 and VALUE is the old value.\n\
4382 An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
4383 was adjusted in position by the offset DISTANCE (an integer).\n\
4385 An entry of the form POSITION indicates that point was at the buffer\n\
4386 location given by the integer. Undoing an entry of this form places\n\
4387 point at POSITION.\n\
4389 nil marks undo boundaries. The undo command treats the changes\n\
4390 between two undo boundaries as a single step to be undone.\n\
4392 If the value of the variable is t, undo information is not recorded.");
4394 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4397 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
4398 "Non-nil means the mark and region are currently active in this buffer.\n\
4399 Automatically local in all buffers.");
4401 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
4402 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
4403 This variable is buffer-local, in all buffers.\n\
4405 Normally, the line-motion functions work by scanning the buffer for\n\
4406 newlines. Columnar operations (like move-to-column and\n\
4407 compute-motion) also work by scanning the buffer, summing character\n\
4408 widths as they go. This works well for ordinary text, but if the\n\
4409 buffer's lines are very long (say, more than 500 characters), these\n\
4410 motion functions will take longer to execute. Emacs may also take\n\
4411 longer to update the display.\n\
4413 If cache-long-line-scans is non-nil, these motion functions cache the\n\
4414 results of their scans, and consult the cache to avoid rescanning\n\
4415 regions of the buffer until the text is modified. The caches are most\n\
4416 beneficial when they prevent the most searching---that is, when the\n\
4417 buffer contains long lines and large regions of characters with the\n\
4418 same, fixed screen width.\n\
4420 When cache-long-line-scans is non-nil, processing short lines will\n\
4421 become slightly slower (because of the overhead of consulting the\n\
4422 cache), and the caches will use memory roughly proportional to the\n\
4423 number of newlines and characters whose screen width varies.\n\
4425 The caches require no explicit maintenance; their accuracy is\n\
4426 maintained internally by the Emacs primitives. Enabling or disabling\n\
4427 the cache should not affect the behavior of any of the motion\n\
4428 functions; it should only affect their performance.");
4430 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
4431 "Value of point before the last series of scroll operations, or nil.");
4433 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
4434 "List of formats to use when saving this buffer.\n\
4435 Formats are defined by `format-alist'. This variable is\n\
4436 set when a file is visited. Automatically local in all buffers.");
4438 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
4439 ¤t_buffer
->invisibility_spec
, Qnil
,
4440 "Invisibility spec of this buffer.\n\
4441 The default is t, which means that text is invisible\n\
4442 if it has a non-nil `invisible' property.\n\
4443 If the value is a list, a text character is invisible if its `invisible'\n\
4444 property is an element in that list.\n\
4445 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
4446 then characters with property value PROP are invisible,\n\
4447 and they have an ellipsis as well if ELLIPSIS is non-nil.");
4449 DEFVAR_PER_BUFFER ("buffer-display-count",
4450 ¤t_buffer
->display_count
, Qnil
,
4451 "A number incremented each time the buffer is displayed in a window.");
4453 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
4454 "*Non-nil means deactivate the mark when the buffer contents change.\n\
4455 Non-nil also enables highlighting of the region whenever the mark is active.\n\
4456 The variable `highlight-nonselected-windows' controls whether to highlight\n\
4457 all windows or just the selected window.");
4458 Vtransient_mark_mode
= Qnil
;
4460 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
4461 "*Non-nil means disregard read-only status of buffers or characters.\n\
4462 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
4463 text properties. If the value is a list, disregard `buffer-read-only'\n\
4464 and disregard a `read-only' text property if the property value\n\
4465 is a member of the list.");
4466 Vinhibit_read_only
= Qnil
;
4468 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
4469 "List of functions called with no args to query before killing a buffer.");
4470 Vkill_buffer_query_functions
= Qnil
;
4472 defsubr (&Sbuffer_live_p
);
4473 defsubr (&Sbuffer_list
);
4474 defsubr (&Sget_buffer
);
4475 defsubr (&Sget_file_buffer
);
4476 defsubr (&Sget_buffer_create
);
4477 defsubr (&Smake_indirect_buffer
);
4478 defsubr (&Sgenerate_new_buffer_name
);
4479 defsubr (&Sbuffer_name
);
4480 /*defsubr (&Sbuffer_number);*/
4481 defsubr (&Sbuffer_file_name
);
4482 defsubr (&Sbuffer_base_buffer
);
4483 defsubr (&Sbuffer_local_variables
);
4484 defsubr (&Sbuffer_modified_p
);
4485 defsubr (&Sset_buffer_modified_p
);
4486 defsubr (&Sbuffer_modified_tick
);
4487 defsubr (&Srename_buffer
);
4488 defsubr (&Sother_buffer
);
4489 defsubr (&Sbuffer_disable_undo
);
4490 defsubr (&Sbuffer_enable_undo
);
4491 defsubr (&Skill_buffer
);
4492 defsubr (&Sset_buffer_major_mode
);
4493 defsubr (&Sswitch_to_buffer
);
4494 defsubr (&Spop_to_buffer
);
4495 defsubr (&Scurrent_buffer
);
4496 defsubr (&Sset_buffer
);
4497 defsubr (&Sbarf_if_buffer_read_only
);
4498 defsubr (&Sbury_buffer
);
4499 defsubr (&Serase_buffer
);
4500 defsubr (&Sset_buffer_multibyte
);
4501 defsubr (&Skill_all_local_variables
);
4503 defsubr (&Soverlayp
);
4504 defsubr (&Smake_overlay
);
4505 defsubr (&Sdelete_overlay
);
4506 defsubr (&Smove_overlay
);
4507 defsubr (&Soverlay_start
);
4508 defsubr (&Soverlay_end
);
4509 defsubr (&Soverlay_buffer
);
4510 defsubr (&Soverlay_properties
);
4511 defsubr (&Soverlays_at
);
4512 defsubr (&Soverlays_in
);
4513 defsubr (&Snext_overlay_change
);
4514 defsubr (&Sprevious_overlay_change
);
4515 defsubr (&Soverlay_recenter
);
4516 defsubr (&Soverlay_lists
);
4517 defsubr (&Soverlay_get
);
4518 defsubr (&Soverlay_put
);
4523 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
4524 initial_define_key (control_x_map
, 'k', "kill-buffer");
4526 /* This must not be in syms_of_buffer, because Qdisabled is not
4527 initialized when that function gets called. */
4528 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);