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
)
1682 int c
= FETCH_BYTE (byte_pos
);
1684 while (! CHAR_HEAD_P (c
))
1687 c
= FETCH_BYTE (byte_pos
);
1693 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
1695 "Set the multibyte flag of the current buffer to FLAG.\n\
1696 If FLAG is t, this makes the buffer a multibyte buffer.\n\
1697 If FLAG is nil, this makes the buffer a single-byte buffer.\n\
1698 The buffer contents remain unchanged as a sequence of bytes\n\
1699 but the contents viewed as characters do change.")
1703 Lisp_Object tail
, markers
;
1705 /* It would be better to update the list,
1706 but this is good enough for now. */
1707 if (! EQ (current_buffer
->undo_list
, Qt
))
1708 current_buffer
->undo_list
= Qnil
;
1710 /* If the cached position is for this buffer, clear it out. */
1711 clear_charpos_cache (current_buffer
);
1715 /* Do this first, so it can use CHAR_TO_BYTE
1716 to calculate the old correspondences. */
1717 set_intervals_multibyte (0);
1719 current_buffer
->enable_multibyte_characters
= Qnil
;
1725 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
1727 tail
= BUF_MARKERS (current_buffer
);
1728 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1730 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
1731 tail
= XMARKER (tail
)->chain
;
1736 /* Do this first, so that chars_in_text asks the right question.
1737 set_intervals_multibyte needs it too. */
1738 current_buffer
->enable_multibyte_characters
= Qt
;
1740 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
1741 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
1743 Z
= chars_in_text (GPT_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
1745 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
1746 if (BEGV_BYTE
> GPT_BYTE
)
1747 BEGV
= chars_in_text (GPT_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
1749 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
1751 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
1752 if (ZV_BYTE
> GPT_BYTE
)
1753 ZV
= chars_in_text (GPT_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
1755 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
1758 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
1761 if (pt_byte
> GPT_BYTE
)
1762 pt
= chars_in_text (GPT_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
1764 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
1765 TEMP_SET_PT_BOTH (pt
, pt_byte
);
1768 tail
= markers
= BUF_MARKERS (current_buffer
);
1769 BUF_MARKERS (current_buffer
) = Qnil
;
1771 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1773 XMARKER (tail
)->bytepos
1774 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
1775 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
1777 tail
= XMARKER (tail
)->chain
;
1779 BUF_MARKERS (current_buffer
) = markers
;
1781 /* Do this last, so it can calculate the new correspondences
1782 between chars and bytes. */
1783 set_intervals_multibyte (1);
1789 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1791 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1792 Most local variable bindings are eliminated so that the default values\n\
1793 become effective once more. Also, the syntax table is set from\n\
1794 `standard-syntax-table', the local keymap is set to nil,\n\
1795 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1796 This function also forces redisplay of the mode line.\n\
1798 Every function to select a new major mode starts by\n\
1799 calling this function.\n\n\
1800 As a special exception, local variables whose names have\n\
1801 a non-nil `permanent-local' property are not eliminated by this function.\n\
1803 The first thing this function does is run\n\
1804 the normal hook `change-major-mode-hook'.")
1807 register Lisp_Object alist
, sym
, tem
;
1810 if (!NILP (Vrun_hooks
))
1811 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1812 oalist
= current_buffer
->local_var_alist
;
1814 /* Make sure none of the bindings in oalist
1815 remain swapped in, in their symbols. */
1817 swap_out_buffer_local_variables (current_buffer
);
1819 /* Actually eliminate all local bindings of this buffer. */
1821 reset_buffer_local_variables (current_buffer
, 0);
1823 /* Redisplay mode lines; we are changing major mode. */
1825 update_mode_lines
++;
1827 /* Any which are supposed to be permanent,
1828 make local again, with the same values they had. */
1830 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1832 sym
= XCONS (XCONS (alist
)->car
)->car
;
1833 tem
= Fget (sym
, Qpermanent_local
);
1836 Fmake_local_variable (sym
);
1837 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1841 /* Force mode-line redisplay. Useful here because all major mode
1842 commands call this function. */
1843 update_mode_lines
++;
1848 /* Make sure no local variables remain set up with buffer B
1849 for their current values. */
1852 swap_out_buffer_local_variables (b
)
1855 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
1857 XSETBUFFER (buffer
, b
);
1858 oalist
= b
->local_var_alist
;
1860 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1862 sym
= XCONS (XCONS (alist
)->car
)->car
;
1864 /* Need not do anything if some other buffer's binding is now encached. */
1865 tem
= XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->car
;
1866 if (XBUFFER (tem
) == current_buffer
)
1868 /* Symbol is set up for this buffer's old local value.
1869 Set it up for the current buffer with the default value. */
1871 tem
= XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1872 /* Store the symbol's current value into the alist entry
1873 it is currently set up for. This is so that, if the
1874 local is marked permanent, and we make it local again
1875 later in Fkill_all_local_variables, we don't lose the value. */
1876 XCONS (XCONS (tem
)->car
)->cdr
1877 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->car
);
1878 /* Switch to the symbol's default-value alist entry. */
1879 XCONS (tem
)->car
= tem
;
1880 /* Mark it as current for buffer B. */
1881 XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->car
1883 /* Store the current value into any forwarding in the symbol. */
1884 store_symval_forwarding (sym
, XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->car
,
1890 /* Find all the overlays in the current buffer that contain position POS.
1891 Return the number found, and store them in a vector in *VEC_PTR.
1892 Store in *LEN_PTR the size allocated for the vector.
1893 Store in *NEXT_PTR the next position after POS where an overlay starts,
1894 or ZV if there are no more overlays.
1895 Store in *PREV_PTR the previous position before POS where an overlay ends,
1896 or BEGV if there are no previous overlays.
1897 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
1899 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1900 when this function is called.
1902 If EXTEND is non-zero, we make the vector bigger if necessary.
1903 If EXTEND is zero, we never extend the vector,
1904 and we store only as many overlays as will fit.
1905 But we still return the total number of overlays. */
1908 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
1911 Lisp_Object
**vec_ptr
;
1916 Lisp_Object tail
, overlay
, start
, end
, result
;
1919 Lisp_Object
*vec
= *vec_ptr
;
1922 int inhibit_storing
= 0;
1924 for (tail
= current_buffer
->overlays_before
;
1926 tail
= XCONS (tail
)->cdr
)
1928 int startpos
, endpos
;
1930 overlay
= XCONS (tail
)->car
;
1932 start
= OVERLAY_START (overlay
);
1933 end
= OVERLAY_END (overlay
);
1934 endpos
= OVERLAY_POSITION (end
);
1943 startpos
= OVERLAY_POSITION (start
);
1944 if (startpos
<= pos
)
1948 /* The supplied vector is full.
1949 Either make it bigger, or don't store any more in it. */
1952 *len_ptr
= len
*= 2;
1953 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1957 inhibit_storing
= 1;
1960 if (!inhibit_storing
)
1962 /* Keep counting overlays even if we can't return them all. */
1965 else if (startpos
< next
)
1969 for (tail
= current_buffer
->overlays_after
;
1971 tail
= XCONS (tail
)->cdr
)
1973 int startpos
, endpos
;
1975 overlay
= XCONS (tail
)->car
;
1977 start
= OVERLAY_START (overlay
);
1978 end
= OVERLAY_END (overlay
);
1979 startpos
= OVERLAY_POSITION (start
);
1982 if (startpos
< next
)
1986 endpos
= OVERLAY_POSITION (end
);
1993 *len_ptr
= len
*= 2;
1994 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1998 inhibit_storing
= 1;
2001 if (!inhibit_storing
)
2005 else if (endpos
< pos
&& endpos
> prev
)
2016 /* Find all the overlays in the current buffer that overlap the range BEG-END
2017 or are empty at BEG.
2019 Return the number found, and store them in a vector in *VEC_PTR.
2020 Store in *LEN_PTR the size allocated for the vector.
2021 Store in *NEXT_PTR the next position after POS where an overlay starts,
2022 or ZV if there are no more overlays.
2023 Store in *PREV_PTR the previous position before POS where an overlay ends,
2024 or BEGV if there are no previous overlays.
2025 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2027 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2028 when this function is called.
2030 If EXTEND is non-zero, we make the vector bigger if necessary.
2031 If EXTEND is zero, we never extend the vector,
2032 and we store only as many overlays as will fit.
2033 But we still return the total number of overlays. */
2036 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2039 Lisp_Object
**vec_ptr
;
2044 Lisp_Object tail
, overlay
, ostart
, oend
, result
;
2047 Lisp_Object
*vec
= *vec_ptr
;
2050 int inhibit_storing
= 0;
2052 for (tail
= current_buffer
->overlays_before
;
2054 tail
= XCONS (tail
)->cdr
)
2056 int startpos
, endpos
;
2058 overlay
= XCONS (tail
)->car
;
2060 ostart
= OVERLAY_START (overlay
);
2061 oend
= OVERLAY_END (overlay
);
2062 endpos
= OVERLAY_POSITION (oend
);
2069 startpos
= OVERLAY_POSITION (ostart
);
2070 /* Count an interval if it either overlaps the range
2071 or is empty at the start of the range. */
2072 if ((beg
< endpos
&& startpos
< end
)
2073 || (startpos
== endpos
&& beg
== endpos
))
2077 /* The supplied vector is full.
2078 Either make it bigger, or don't store any more in it. */
2081 *len_ptr
= len
*= 2;
2082 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2086 inhibit_storing
= 1;
2089 if (!inhibit_storing
)
2091 /* Keep counting overlays even if we can't return them all. */
2094 else if (startpos
< next
)
2098 for (tail
= current_buffer
->overlays_after
;
2100 tail
= XCONS (tail
)->cdr
)
2102 int startpos
, endpos
;
2104 overlay
= XCONS (tail
)->car
;
2106 ostart
= OVERLAY_START (overlay
);
2107 oend
= OVERLAY_END (overlay
);
2108 startpos
= OVERLAY_POSITION (ostart
);
2111 if (startpos
< next
)
2115 endpos
= OVERLAY_POSITION (oend
);
2116 /* Count an interval if it either overlaps the range
2117 or is empty at the start of the range. */
2118 if ((beg
< endpos
&& startpos
< end
)
2119 || (startpos
== endpos
&& beg
== endpos
))
2125 *len_ptr
= len
*= 2;
2126 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2130 inhibit_storing
= 1;
2133 if (!inhibit_storing
)
2137 else if (endpos
< beg
&& endpos
> prev
)
2148 /* Fast function to just test if we're at an overlay boundary. */
2150 overlay_touches_p (pos
)
2153 Lisp_Object tail
, overlay
;
2155 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2156 tail
= XCONS (tail
)->cdr
)
2160 overlay
= XCONS (tail
)->car
;
2161 if (!GC_OVERLAYP (overlay
))
2164 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2167 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2171 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2172 tail
= XCONS (tail
)->cdr
)
2176 overlay
= XCONS (tail
)->car
;
2177 if (!GC_OVERLAYP (overlay
))
2180 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2183 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2191 Lisp_Object overlay
;
2197 compare_overlays (s1
, s2
)
2198 struct sortvec
*s1
, *s2
;
2200 if (s1
->priority
!= s2
->priority
)
2201 return s1
->priority
- s2
->priority
;
2202 if (s1
->beg
!= s2
->beg
)
2203 return s1
->beg
- s2
->beg
;
2204 if (s1
->end
!= s2
->end
)
2205 return s2
->end
- s1
->end
;
2209 /* Sort an array of overlays by priority. The array is modified in place.
2210 The return value is the new size; this may be smaller than the original
2211 size if some of the overlays were invalid or were window-specific. */
2213 sort_overlays (overlay_vec
, noverlays
, w
)
2214 Lisp_Object
*overlay_vec
;
2219 struct sortvec
*sortvec
;
2220 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2222 /* Put the valid and relevant overlays into sortvec. */
2224 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2227 Lisp_Object overlay
;
2229 overlay
= overlay_vec
[i
];
2230 if (OVERLAY_VALID (overlay
)
2231 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2232 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2234 /* If we're interested in a specific window, then ignore
2235 overlays that are limited to some other window. */
2240 window
= Foverlay_get (overlay
, Qwindow
);
2241 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2245 /* This overlay is good and counts: put it into sortvec. */
2246 sortvec
[j
].overlay
= overlay
;
2247 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2248 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2249 tem
= Foverlay_get (overlay
, Qpriority
);
2251 sortvec
[j
].priority
= XINT (tem
);
2253 sortvec
[j
].priority
= 0;
2259 /* Sort the overlays into the proper order: increasing priority. */
2262 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2264 for (i
= 0; i
< noverlays
; i
++)
2265 overlay_vec
[i
] = sortvec
[i
].overlay
;
2271 Lisp_Object string
, string2
;
2278 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2279 int size
; /* Allocated length of that array. */
2280 int used
; /* How much of the array is currently in use. */
2281 int bytes
; /* Total length of the strings in buf. */
2284 /* Buffers for storing information about the overlays touching a given
2285 position. These could be automatic variables in overlay_strings, but
2286 it's more efficient to hold onto the memory instead of repeatedly
2287 allocating and freeing it. */
2288 static struct sortstrlist overlay_heads
, overlay_tails
;
2289 static unsigned char *overlay_str_buf
;
2291 /* Allocated length of overlay_str_buf. */
2292 static int overlay_str_len
;
2294 /* A comparison function suitable for passing to qsort. */
2296 cmp_for_strings (as1
, as2
)
2299 struct sortstr
*s1
= (struct sortstr
*)as1
;
2300 struct sortstr
*s2
= (struct sortstr
*)as2
;
2301 if (s1
->size
!= s2
->size
)
2302 return s2
->size
- s1
->size
;
2303 if (s1
->priority
!= s2
->priority
)
2304 return s1
->priority
- s2
->priority
;
2309 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2310 struct sortstrlist
*ssl
;
2311 Lisp_Object str
, str2
, pri
;
2316 if (ssl
->used
== ssl
->size
)
2322 ssl
->buf
= ((struct sortstr
*)
2323 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2325 ssl
->buf
[ssl
->used
].string
= str
;
2326 ssl
->buf
[ssl
->used
].string2
= str2
;
2327 ssl
->buf
[ssl
->used
].size
= size
;
2328 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2331 if (NILP (current_buffer
->enable_multibyte_characters
))
2332 nbytes
= XSTRING (str
)->size
;
2333 else if (! STRING_MULTIBYTE (str
))
2334 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2335 XSTRING (str
)->size_byte
);
2337 nbytes
= XSTRING (str
)->size_byte
;
2339 ssl
->bytes
+= nbytes
;
2343 if (NILP (current_buffer
->enable_multibyte_characters
))
2344 nbytes
= XSTRING (str2
)->size
;
2345 else if (! STRING_MULTIBYTE (str2
))
2346 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2347 XSTRING (str2
)->size_byte
);
2349 nbytes
= XSTRING (str2
)->size_byte
;
2351 ssl
->bytes
+= nbytes
;
2355 /* Return the concatenation of the strings associated with overlays that
2356 begin or end at POS, ignoring overlays that are specific to a window
2357 other than W. The strings are concatenated in the appropriate order:
2358 shorter overlays nest inside longer ones, and higher priority inside
2359 lower. Normally all of the after-strings come first, but zero-sized
2360 overlays have their after-strings ride along with the before-strings
2361 because it would look strange to print them inside-out.
2363 Returns the string length, and stores the contents indirectly through
2364 PSTR, if that variable is non-null. The string may be overwritten by
2365 subsequent calls. */
2368 overlay_strings (pos
, w
, pstr
)
2371 unsigned char **pstr
;
2373 Lisp_Object ov
, overlay
, window
, str
;
2374 int startpos
, endpos
;
2375 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2377 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2378 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2379 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2381 overlay
= XCONS (ov
)->car
;
2382 if (!OVERLAYP (overlay
))
2385 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2386 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2389 if (endpos
!= pos
&& startpos
!= pos
)
2391 window
= Foverlay_get (overlay
, Qwindow
);
2392 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2395 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2396 record_overlay_string (&overlay_heads
, str
,
2398 ? Foverlay_get (overlay
, Qafter_string
)
2400 Foverlay_get (overlay
, Qpriority
),
2402 else if (endpos
== pos
2403 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2404 record_overlay_string (&overlay_tails
, str
, Qnil
,
2405 Foverlay_get (overlay
, Qpriority
),
2408 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2410 overlay
= XCONS (ov
)->car
;
2411 if (!OVERLAYP (overlay
))
2414 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2415 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2418 if (endpos
!= pos
&& startpos
!= pos
)
2420 window
= Foverlay_get (overlay
, Qwindow
);
2421 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2424 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2425 record_overlay_string (&overlay_heads
, str
,
2427 ? Foverlay_get (overlay
, Qafter_string
)
2429 Foverlay_get (overlay
, Qpriority
),
2431 else if (endpos
== pos
2432 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2433 record_overlay_string (&overlay_tails
, str
, Qnil
,
2434 Foverlay_get (overlay
, Qpriority
),
2437 if (overlay_tails
.used
> 1)
2438 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2440 if (overlay_heads
.used
> 1)
2441 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2443 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2448 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2450 if (total
> overlay_str_len
)
2452 overlay_str_len
= total
;
2453 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2456 p
= overlay_str_buf
;
2457 for (i
= overlay_tails
.used
; --i
>= 0;)
2460 tem
= overlay_tails
.buf
[i
].string
;
2461 nbytes
= copy_text (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size_byte
,
2462 STRING_MULTIBYTE (tem
), multibyte
);
2465 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2468 tem
= overlay_heads
.buf
[i
].string
;
2469 nbytes
= copy_text (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size_byte
,
2470 STRING_MULTIBYTE (tem
), multibyte
);
2472 tem
= overlay_heads
.buf
[i
].string2
;
2475 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2476 XSTRING (tem
)->size_byte
,
2477 STRING_MULTIBYTE (tem
), multibyte
);
2481 if (p
!= overlay_str_buf
+ total
)
2484 *pstr
= overlay_str_buf
;
2490 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2493 recenter_overlay_lists (buf
, pos
)
2497 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2499 /* See if anything in overlays_before should move to overlays_after. */
2501 /* We don't strictly need prev in this loop; it should always be nil.
2502 But we use it for symmetry and in case that should cease to be true
2503 with some future change. */
2505 for (tail
= buf
->overlays_before
;
2507 prev
= tail
, tail
= next
)
2509 next
= XCONS (tail
)->cdr
;
2510 overlay
= XCONS (tail
)->car
;
2512 /* If the overlay is not valid, get rid of it. */
2513 if (!OVERLAY_VALID (overlay
))
2518 /* Splice the cons cell TAIL out of overlays_before. */
2520 XCONS (prev
)->cdr
= next
;
2522 buf
->overlays_before
= next
;
2528 beg
= OVERLAY_START (overlay
);
2529 end
= OVERLAY_END (overlay
);
2531 if (OVERLAY_POSITION (end
) > pos
)
2533 /* OVERLAY needs to be moved. */
2534 int where
= OVERLAY_POSITION (beg
);
2535 Lisp_Object other
, other_prev
;
2537 /* Splice the cons cell TAIL out of overlays_before. */
2539 XCONS (prev
)->cdr
= next
;
2541 buf
->overlays_before
= next
;
2543 /* Search thru overlays_after for where to put it. */
2545 for (other
= buf
->overlays_after
;
2547 other_prev
= other
, other
= XCONS (other
)->cdr
)
2549 Lisp_Object otherbeg
, otheroverlay
, follower
;
2552 otheroverlay
= XCONS (other
)->car
;
2553 if (! OVERLAY_VALID (otheroverlay
))
2556 otherbeg
= OVERLAY_START (otheroverlay
);
2557 if (OVERLAY_POSITION (otherbeg
) >= where
)
2561 /* Add TAIL to overlays_after before OTHER. */
2562 XCONS (tail
)->cdr
= other
;
2563 if (!NILP (other_prev
))
2564 XCONS (other_prev
)->cdr
= tail
;
2566 buf
->overlays_after
= tail
;
2570 /* We've reached the things that should stay in overlays_before.
2571 All the rest of overlays_before must end even earlier,
2576 /* See if anything in overlays_after should be in overlays_before. */
2578 for (tail
= buf
->overlays_after
;
2580 prev
= tail
, tail
= next
)
2582 next
= XCONS (tail
)->cdr
;
2583 overlay
= XCONS (tail
)->car
;
2585 /* If the overlay is not valid, get rid of it. */
2586 if (!OVERLAY_VALID (overlay
))
2591 /* Splice the cons cell TAIL out of overlays_after. */
2593 XCONS (prev
)->cdr
= next
;
2595 buf
->overlays_after
= next
;
2601 beg
= OVERLAY_START (overlay
);
2602 end
= OVERLAY_END (overlay
);
2604 /* Stop looking, when we know that nothing further
2605 can possibly end before POS. */
2606 if (OVERLAY_POSITION (beg
) > pos
)
2609 if (OVERLAY_POSITION (end
) <= pos
)
2611 /* OVERLAY needs to be moved. */
2612 int where
= OVERLAY_POSITION (end
);
2613 Lisp_Object other
, other_prev
;
2615 /* Splice the cons cell TAIL out of overlays_after. */
2617 XCONS (prev
)->cdr
= next
;
2619 buf
->overlays_after
= next
;
2621 /* Search thru overlays_before for where to put it. */
2623 for (other
= buf
->overlays_before
;
2625 other_prev
= other
, other
= XCONS (other
)->cdr
)
2627 Lisp_Object otherend
, otheroverlay
;
2630 otheroverlay
= XCONS (other
)->car
;
2631 if (! OVERLAY_VALID (otheroverlay
))
2634 otherend
= OVERLAY_END (otheroverlay
);
2635 if (OVERLAY_POSITION (otherend
) <= where
)
2639 /* Add TAIL to overlays_before before OTHER. */
2640 XCONS (tail
)->cdr
= other
;
2641 if (!NILP (other_prev
))
2642 XCONS (other_prev
)->cdr
= tail
;
2644 buf
->overlays_before
= tail
;
2649 XSETFASTINT (buf
->overlay_center
, pos
);
2653 adjust_overlays_for_insert (pos
, length
)
2657 /* After an insertion, the lists are still sorted properly,
2658 but we may need to update the value of the overlay center. */
2659 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
2660 XSETFASTINT (current_buffer
->overlay_center
,
2661 XFASTINT (current_buffer
->overlay_center
) + length
);
2665 adjust_overlays_for_delete (pos
, length
)
2669 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
2670 /* The deletion was to our right. No change needed; the before- and
2671 after-lists are still consistent. */
2673 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
2674 /* The deletion was to our left. We need to adjust the center value
2675 to account for the change in position, but the lists are consistent
2676 given the new value. */
2677 XSETFASTINT (current_buffer
->overlay_center
,
2678 XFASTINT (current_buffer
->overlay_center
) - length
);
2680 /* We're right in the middle. There might be things on the after-list
2681 that now belong on the before-list. Recentering will move them,
2682 and also update the center point. */
2683 recenter_overlay_lists (current_buffer
, pos
);
2686 /* Fix up overlays that were garbled as a result of permuting markers
2687 in the range START through END. Any overlay with at least one
2688 endpoint in this range will need to be unlinked from the overlay
2689 list and reinserted in its proper place.
2690 Such an overlay might even have negative size at this point.
2691 If so, we'll reverse the endpoints. Can you think of anything
2692 better to do in this situation? */
2694 fix_overlays_in_range (start
, end
)
2695 register int start
, end
;
2697 Lisp_Object tem
, overlay
;
2698 Lisp_Object before_list
, after_list
;
2699 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
2700 int startpos
, endpos
;
2702 /* This algorithm shifts links around instead of consing and GCing.
2703 The loop invariant is that before_list (resp. after_list) is a
2704 well-formed list except that its last element, the one that
2705 *pbefore (resp. *pafter) points to, is still uninitialized.
2706 So it's not a bug that before_list isn't initialized, although
2707 it may look strange. */
2708 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
2710 overlay
= XCONS (*ptail
)->car
;
2711 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2714 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2716 || (startpos
>= start
&& startpos
< end
))
2718 /* If the overlay is backwards, fix that now. */
2719 if (startpos
> endpos
)
2722 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2724 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2726 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2728 /* Add it to the end of the wrong list. Later on,
2729 recenter_overlay_lists will move it to the right place. */
2730 if (endpos
< XINT (current_buffer
->overlay_center
))
2733 pafter
= &XCONS (*ptail
)->cdr
;
2738 pbefore
= &XCONS (*ptail
)->cdr
;
2740 *ptail
= XCONS (*ptail
)->cdr
;
2743 ptail
= &XCONS (*ptail
)->cdr
;
2745 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
2747 overlay
= XCONS (*ptail
)->car
;
2748 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2749 if (startpos
>= end
)
2751 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2752 if (startpos
>= start
2753 || (endpos
>= start
&& endpos
< end
))
2755 if (startpos
> endpos
)
2758 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2760 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2762 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2764 if (endpos
< XINT (current_buffer
->overlay_center
))
2767 pafter
= &XCONS (*ptail
)->cdr
;
2772 pbefore
= &XCONS (*ptail
)->cdr
;
2774 *ptail
= XCONS (*ptail
)->cdr
;
2777 ptail
= &XCONS (*ptail
)->cdr
;
2780 /* Splice the constructed (wrong) lists into the buffer's lists,
2781 and let the recenter function make it sane again. */
2782 *pbefore
= current_buffer
->overlays_before
;
2783 current_buffer
->overlays_before
= before_list
;
2784 recenter_overlay_lists (current_buffer
,
2785 XINT (current_buffer
->overlay_center
));
2787 *pafter
= current_buffer
->overlays_after
;
2788 current_buffer
->overlays_after
= after_list
;
2789 recenter_overlay_lists (current_buffer
,
2790 XINT (current_buffer
->overlay_center
));
2793 /* We have two types of overlay: the one whose ending marker is
2794 after-insertion-marker (this is the usual case) and the one whose
2795 ending marker is before-insertion-marker. When `overlays_before'
2796 contains overlays of the latter type and the former type in this
2797 order and both overlays end at inserting position, inserting a text
2798 increases only the ending marker of the latter type, which results
2799 in incorrect ordering of `overlays_before'.
2801 This function fixes ordering of overlays in the slot
2802 `overlays_before' of the buffer *BP. Before the insertion, `point'
2803 was at PREV, and now is at POS. */
2806 fix_overlays_before (bp
, prev
, pos
)
2810 Lisp_Object
*tailp
= &bp
->overlays_before
;
2811 Lisp_Object
*right_place
;
2814 /* After the insertion, the several overlays may be in incorrect
2815 order. The possibility is that, in the list `overlays_before',
2816 an overlay which ends at POS appears after an overlay which ends
2817 at PREV. Since POS is greater than PREV, we must fix the
2818 ordering of these overlays, by moving overlays ends at POS before
2819 the overlays ends at PREV. */
2821 /* At first, find a place where disordered overlays should be linked
2822 in. It is where an overlay which end before POS exists. (i.e. an
2823 overlay whose ending marker is after-insertion-marker if disorder
2825 while (!NILP (*tailp
)
2826 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
)))
2828 tailp
= &XCONS (*tailp
)->cdr
;
2830 /* If we don't find such an overlay,
2831 or the found one ends before PREV,
2832 or the found one is the last one in the list,
2833 we don't have to fix anything. */
2836 || NILP (XCONS (*tailp
)->cdr
))
2839 right_place
= tailp
;
2840 tailp
= &XCONS (*tailp
)->cdr
;
2842 /* Now, end position of overlays in the list *TAILP should be before
2843 or equal to PREV. In the loop, an overlay which ends at POS is
2844 moved ahead to the place pointed by RIGHT_PLACE. If we found an
2845 overlay which ends before PREV, the remaining overlays are in
2847 while (!NILP (*tailp
))
2849 end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
));
2852 { /* This overlay is disordered. */
2853 Lisp_Object found
= *tailp
;
2855 /* Unlink the found overlay. */
2856 *tailp
= XCONS (found
)->cdr
;
2857 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
2858 XCONS (found
)->cdr
= *right_place
;
2859 /* Link it into the right place. */
2860 *right_place
= found
;
2862 else if (end
== prev
)
2863 tailp
= &XCONS (*tailp
)->cdr
;
2864 else /* No more disordered overlay. */
2869 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
2870 "Return t if OBJECT is an overlay.")
2874 return (OVERLAYP (object
) ? Qt
: Qnil
);
2877 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
2878 "Create a new overlay with range BEG to END in BUFFER.\n\
2879 If omitted, BUFFER defaults to the current buffer.\n\
2880 BEG and END may be integers or markers.\n\
2881 The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\
2882 front delimiter advance when text is inserted there.\n\
2883 The fifth arg REAR-ADVANCE, if non-nil, makes the\n\
2884 rear delimiter advance when text is inserted there.")
2885 (beg
, end
, buffer
, front_advance
, rear_advance
)
2886 Lisp_Object beg
, end
, buffer
;
2887 Lisp_Object front_advance
, rear_advance
;
2889 Lisp_Object overlay
;
2893 XSETBUFFER (buffer
, current_buffer
);
2895 CHECK_BUFFER (buffer
, 2);
2897 && ! EQ (Fmarker_buffer (beg
), buffer
))
2898 error ("Marker points into wrong buffer");
2900 && ! EQ (Fmarker_buffer (end
), buffer
))
2901 error ("Marker points into wrong buffer");
2903 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
2904 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2906 if (XINT (beg
) > XINT (end
))
2909 temp
= beg
; beg
= end
; end
= temp
;
2912 b
= XBUFFER (buffer
);
2914 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
2915 end
= Fset_marker (Fmake_marker (), end
, buffer
);
2917 if (!NILP (front_advance
))
2918 XMARKER (beg
)->insertion_type
= 1;
2919 if (!NILP (rear_advance
))
2920 XMARKER (end
)->insertion_type
= 1;
2922 overlay
= allocate_misc ();
2923 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
2924 XOVERLAY (overlay
)->start
= beg
;
2925 XOVERLAY (overlay
)->end
= end
;
2926 XOVERLAY (overlay
)->plist
= Qnil
;
2928 /* Put the new overlay on the wrong list. */
2929 end
= OVERLAY_END (overlay
);
2930 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
2931 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
2933 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
2935 /* This puts it in the right list, and in the right order. */
2936 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
2938 /* We don't need to redisplay the region covered by the overlay, because
2939 the overlay has no properties at the moment. */
2944 /* Mark a section of BUF as needing redisplay because of overlays changes. */
2947 modify_overlay (buf
, start
, end
)
2957 start
= end
; end
= temp
;
2960 /* If this is a buffer not in the selected window,
2961 we must do other windows. */
2962 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
2963 windows_or_buffers_changed
= 1;
2964 /* If it's not current, we can't use beg_unchanged, end_unchanged for it. */
2965 else if (buf
!= current_buffer
)
2966 windows_or_buffers_changed
= 1;
2967 /* If multiple windows show this buffer, we must do other windows. */
2968 else if (buffer_shared
> 1)
2969 windows_or_buffers_changed
= 1;
2972 if (unchanged_modified
== MODIFF
2973 && overlay_unchanged_modified
== OVERLAY_MODIFF
)
2975 beg_unchanged
= start
- BEG
;
2976 end_unchanged
= Z
- end
;
2980 if (Z
- end
< end_unchanged
)
2981 end_unchanged
= Z
- end
;
2982 if (start
- BEG
< beg_unchanged
)
2983 beg_unchanged
= start
- BEG
;
2987 ++BUF_OVERLAY_MODIFF (buf
);
2991 Lisp_Object
Fdelete_overlay ();
2993 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
2994 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
2995 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
2996 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
2998 (overlay
, beg
, end
, buffer
)
2999 Lisp_Object overlay
, beg
, end
, buffer
;
3001 struct buffer
*b
, *ob
;
3002 Lisp_Object obuffer
;
3003 int count
= specpdl_ptr
- specpdl
;
3005 CHECK_OVERLAY (overlay
, 0);
3007 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3009 XSETBUFFER (buffer
, current_buffer
);
3010 CHECK_BUFFER (buffer
, 3);
3013 && ! EQ (Fmarker_buffer (beg
), buffer
))
3014 error ("Marker points into wrong buffer");
3016 && ! EQ (Fmarker_buffer (end
), buffer
))
3017 error ("Marker points into wrong buffer");
3019 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3020 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3022 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3023 return Fdelete_overlay (overlay
);
3025 if (XINT (beg
) > XINT (end
))
3028 temp
= beg
; beg
= end
; end
= temp
;
3031 specbind (Qinhibit_quit
, Qt
);
3033 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3034 b
= XBUFFER (buffer
);
3035 ob
= XBUFFER (obuffer
);
3037 /* If the overlay has changed buffers, do a thorough redisplay. */
3038 if (!EQ (buffer
, obuffer
))
3040 /* Redisplay where the overlay was. */
3041 if (!NILP (obuffer
))
3046 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3047 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3049 modify_overlay (ob
, o_beg
, o_end
);
3052 /* Redisplay where the overlay is going to be. */
3053 modify_overlay (b
, XINT (beg
), XINT (end
));
3056 /* Redisplay the area the overlay has just left, or just enclosed. */
3059 int change_beg
, change_end
;
3061 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3062 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3064 if (o_beg
== XINT (beg
))
3065 modify_overlay (b
, o_end
, XINT (end
));
3066 else if (o_end
== XINT (end
))
3067 modify_overlay (b
, o_beg
, XINT (beg
));
3070 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3071 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3072 modify_overlay (b
, o_beg
, o_end
);
3076 if (!NILP (obuffer
))
3078 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3079 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3082 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3083 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3085 /* Put the overlay on the wrong list. */
3086 end
= OVERLAY_END (overlay
);
3087 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3088 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3090 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3092 /* This puts it in the right list, and in the right order. */
3093 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3095 return unbind_to (count
, overlay
);
3098 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3099 "Delete the overlay OVERLAY from its buffer.")
3101 Lisp_Object overlay
;
3105 int count
= specpdl_ptr
- specpdl
;
3107 CHECK_OVERLAY (overlay
, 0);
3109 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3113 b
= XBUFFER (buffer
);
3115 specbind (Qinhibit_quit
, Qt
);
3117 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3118 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3121 marker_position (OVERLAY_START (overlay
)),
3122 marker_position (OVERLAY_END (overlay
)));
3124 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3125 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3127 return unbind_to (count
, Qnil
);
3130 /* Overlay dissection functions. */
3132 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3133 "Return the position at which OVERLAY starts.")
3135 Lisp_Object overlay
;
3137 CHECK_OVERLAY (overlay
, 0);
3139 return (Fmarker_position (OVERLAY_START (overlay
)));
3142 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3143 "Return the position at which OVERLAY ends.")
3145 Lisp_Object overlay
;
3147 CHECK_OVERLAY (overlay
, 0);
3149 return (Fmarker_position (OVERLAY_END (overlay
)));
3152 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3153 "Return the buffer OVERLAY belongs to.")
3155 Lisp_Object overlay
;
3157 CHECK_OVERLAY (overlay
, 0);
3159 return Fmarker_buffer (OVERLAY_START (overlay
));
3162 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3163 "Return a list of the properties on OVERLAY.\n\
3164 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
3167 Lisp_Object overlay
;
3169 CHECK_OVERLAY (overlay
, 0);
3171 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3175 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3176 "Return a list of the overlays that contain position POS.")
3181 Lisp_Object
*overlay_vec
;
3185 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3188 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3190 /* Put all the overlays we want in a vector in overlay_vec.
3191 Store the length in len. */
3192 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3193 (int *) 0, (int *) 0);
3195 /* Make a list of them all. */
3196 result
= Flist (noverlays
, overlay_vec
);
3198 xfree (overlay_vec
);
3202 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3203 "Return a list of the overlays that overlap the region BEG ... END.\n\
3204 Overlap means that at least one character is contained within the overlay\n\
3205 and also contained within the specified region.\n\
3206 Empty overlays are included in the result if they are located at BEG\n\
3207 or between BEG and END.")
3209 Lisp_Object beg
, end
;
3212 Lisp_Object
*overlay_vec
;
3216 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
3217 CHECK_NUMBER_COERCE_MARKER (end
, 0);
3220 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3222 /* Put all the overlays we want in a vector in overlay_vec.
3223 Store the length in len. */
3224 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3225 (int *) 0, (int *) 0);
3227 /* Make a list of them all. */
3228 result
= Flist (noverlays
, overlay_vec
);
3230 xfree (overlay_vec
);
3234 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3236 "Return the next position after POS where an overlay starts or ends.\n\
3237 If there are no more overlay boundaries after POS, return (point-max).")
3243 Lisp_Object
*overlay_vec
;
3247 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3250 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3252 /* Put all the overlays we want in a vector in overlay_vec.
3253 Store the length in len.
3254 endpos gets the position where the next overlay starts. */
3255 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3256 &endpos
, (int *) 0);
3258 /* If any of these overlays ends before endpos,
3259 use its ending point instead. */
3260 for (i
= 0; i
< noverlays
; i
++)
3265 oend
= OVERLAY_END (overlay_vec
[i
]);
3266 oendpos
= OVERLAY_POSITION (oend
);
3267 if (oendpos
< endpos
)
3271 xfree (overlay_vec
);
3272 return make_number (endpos
);
3275 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3276 Sprevious_overlay_change
, 1, 1, 0,
3277 "Return the previous position before POS where an overlay starts or ends.\n\
3278 If there are no more overlay boundaries before POS, return (point-min).")
3284 Lisp_Object
*overlay_vec
;
3289 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3292 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3294 /* At beginning of buffer, we know the answer;
3295 avoid bug subtracting 1 below. */
3296 if (XINT (pos
) == BEGV
)
3299 /* Put all the overlays we want in a vector in overlay_vec.
3300 Store the length in len.
3301 prevpos gets the position of an overlay end. */
3302 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3303 (int *) 0, &prevpos
);
3305 /* If any of these overlays starts after prevpos,
3306 maybe use its starting point instead. */
3307 for (i
= 0; i
< noverlays
; i
++)
3312 ostart
= OVERLAY_START (overlay_vec
[i
]);
3313 ostartpos
= OVERLAY_POSITION (ostart
);
3314 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
3315 prevpos
= ostartpos
;
3318 /* If any overlay ends at pos, consider its starting point too. */
3319 for (tail
= current_buffer
->overlays_before
;
3321 tail
= XCONS (tail
)->cdr
)
3323 Lisp_Object overlay
, ostart
;
3326 overlay
= XCONS (tail
)->car
;
3328 ostart
= OVERLAY_START (overlay
);
3329 ostartpos
= OVERLAY_POSITION (ostart
);
3330 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
3331 prevpos
= ostartpos
;
3334 xfree (overlay_vec
);
3335 return make_number (prevpos
);
3338 /* These functions are for debugging overlays. */
3340 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3341 "Return a pair of lists giving all the overlays of the current buffer.\n\
3342 The car has all the overlays before the overlay center;\n\
3343 the cdr has all the overlays after the overlay center.\n\
3344 Recentering overlays moves overlays between these lists.\n\
3345 The lists you get are copies, so that changing them has no effect.\n\
3346 However, the overlays you get are the real objects that the buffer uses.")
3349 Lisp_Object before
, after
;
3350 before
= current_buffer
->overlays_before
;
3352 before
= Fcopy_sequence (before
);
3353 after
= current_buffer
->overlays_after
;
3355 after
= Fcopy_sequence (after
);
3357 return Fcons (before
, after
);
3360 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3361 "Recenter the overlays of the current buffer around position POS.")
3365 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3367 recenter_overlay_lists (current_buffer
, XINT (pos
));
3371 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3372 "Get the property of overlay OVERLAY with property name PROP.")
3374 Lisp_Object overlay
, prop
;
3376 Lisp_Object plist
, fallback
;
3378 CHECK_OVERLAY (overlay
, 0);
3382 for (plist
= XOVERLAY (overlay
)->plist
;
3383 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
3384 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
3386 if (EQ (XCONS (plist
)->car
, prop
))
3387 return XCONS (XCONS (plist
)->cdr
)->car
;
3388 else if (EQ (XCONS (plist
)->car
, Qcategory
))
3391 tem
= Fcar (Fcdr (plist
));
3393 fallback
= Fget (tem
, prop
);
3400 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3401 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
3402 (overlay
, prop
, value
)
3403 Lisp_Object overlay
, prop
, value
;
3405 Lisp_Object tail
, buffer
;
3408 CHECK_OVERLAY (overlay
, 0);
3410 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3412 for (tail
= XOVERLAY (overlay
)->plist
;
3413 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
3414 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
3415 if (EQ (XCONS (tail
)->car
, prop
))
3417 changed
= !EQ (XCONS (XCONS (tail
)->cdr
)->car
, value
);
3418 XCONS (XCONS (tail
)->cdr
)->car
= value
;
3421 /* It wasn't in the list, so add it to the front. */
3422 changed
= !NILP (value
);
3423 XOVERLAY (overlay
)->plist
3424 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3426 if (! NILP (buffer
))
3429 modify_overlay (XBUFFER (buffer
),
3430 marker_position (OVERLAY_START (overlay
)),
3431 marker_position (OVERLAY_END (overlay
)));
3432 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3433 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3434 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3435 Fdelete_overlay (overlay
);
3440 /* Subroutine of report_overlay_modification. */
3442 /* Lisp vector holding overlay hook functions to call.
3443 Vector elements come in pairs.
3444 Each even-index element is a list of hook functions.
3445 The following odd-index element is the overlay they came from.
3447 Before the buffer change, we fill in this vector
3448 as we call overlay hook functions.
3449 After the buffer change, we get the functions to call from this vector.
3450 This way we always call the same functions before and after the change. */
3451 static Lisp_Object last_overlay_modification_hooks
;
3453 /* Number of elements actually used in last_overlay_modification_hooks. */
3454 static int last_overlay_modification_hooks_used
;
3456 /* Add one functionlist/overlay pair
3457 to the end of last_overlay_modification_hooks. */
3460 add_overlay_mod_hooklist (functionlist
, overlay
)
3461 Lisp_Object functionlist
, overlay
;
3463 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3465 if (last_overlay_modification_hooks_used
== oldsize
)
3468 old
= last_overlay_modification_hooks
;
3469 last_overlay_modification_hooks
3470 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3471 bcopy (XVECTOR (old
)->contents
,
3472 XVECTOR (last_overlay_modification_hooks
)->contents
,
3473 sizeof (Lisp_Object
) * oldsize
);
3475 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3476 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3479 /* Run the modification-hooks of overlays that include
3480 any part of the text in START to END.
3481 If this change is an insertion, also
3482 run the insert-before-hooks of overlay starting at END,
3483 and the insert-after-hooks of overlay ending at START.
3485 This is called both before and after the modification.
3486 AFTER is nonzero when we call after the modification.
3488 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3489 When AFTER is nonzero, they are the start position,
3490 the position after the inserted new text,
3491 and the length of deleted or replaced old text. */
3494 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3495 Lisp_Object start
, end
;
3497 Lisp_Object arg1
, arg2
, arg3
;
3499 Lisp_Object prop
, overlay
, tail
;
3500 /* 1 if this change is an insertion. */
3501 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3503 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3507 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3511 /* Call the functions recorded in last_overlay_modification_hooks
3512 rather than scanning the overlays again.
3513 First copy the vector contents, in case some of these hooks
3514 do subsequent modification of the buffer. */
3515 int size
= last_overlay_modification_hooks_used
;
3516 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3519 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3520 copy
, size
* sizeof (Lisp_Object
));
3522 gcpro1
.nvars
= size
;
3524 for (i
= 0; i
< size
;)
3526 Lisp_Object prop
, overlay
;
3528 overlay
= copy
[i
++];
3529 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3535 /* We are being called before a change.
3536 Scan the overlays to find the functions to call. */
3537 last_overlay_modification_hooks_used
= 0;
3539 for (tail
= current_buffer
->overlays_before
;
3541 tail
= XCONS (tail
)->cdr
)
3543 int startpos
, endpos
;
3544 Lisp_Object ostart
, oend
;
3546 overlay
= XCONS (tail
)->car
;
3548 ostart
= OVERLAY_START (overlay
);
3549 oend
= OVERLAY_END (overlay
);
3550 endpos
= OVERLAY_POSITION (oend
);
3551 if (XFASTINT (start
) > endpos
)
3553 startpos
= OVERLAY_POSITION (ostart
);
3554 if (insertion
&& (XFASTINT (start
) == startpos
3555 || XFASTINT (end
) == startpos
))
3557 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3560 /* Copy TAIL in case the hook recenters the overlay lists. */
3562 tail
= Fcopy_sequence (tail
);
3564 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3567 if (insertion
&& (XFASTINT (start
) == endpos
3568 || XFASTINT (end
) == endpos
))
3570 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3574 tail
= Fcopy_sequence (tail
);
3576 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3579 /* Test for intersecting intervals. This does the right thing
3580 for both insertion and deletion. */
3581 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3583 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3587 tail
= Fcopy_sequence (tail
);
3589 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3595 for (tail
= current_buffer
->overlays_after
;
3597 tail
= XCONS (tail
)->cdr
)
3599 int startpos
, endpos
;
3600 Lisp_Object ostart
, oend
;
3602 overlay
= XCONS (tail
)->car
;
3604 ostart
= OVERLAY_START (overlay
);
3605 oend
= OVERLAY_END (overlay
);
3606 startpos
= OVERLAY_POSITION (ostart
);
3607 endpos
= OVERLAY_POSITION (oend
);
3608 if (XFASTINT (end
) < startpos
)
3610 if (insertion
&& (XFASTINT (start
) == startpos
3611 || XFASTINT (end
) == startpos
))
3613 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3617 tail
= Fcopy_sequence (tail
);
3619 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3622 if (insertion
&& (XFASTINT (start
) == endpos
3623 || XFASTINT (end
) == endpos
))
3625 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3629 tail
= Fcopy_sequence (tail
);
3631 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3634 /* Test for intersecting intervals. This does the right thing
3635 for both insertion and deletion. */
3636 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3638 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3642 tail
= Fcopy_sequence (tail
);
3644 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3653 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
3654 Lisp_Object list
, overlay
;
3656 Lisp_Object arg1
, arg2
, arg3
;
3658 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3660 GCPRO4 (list
, arg1
, arg2
, arg3
);
3662 add_overlay_mod_hooklist (list
, overlay
);
3664 while (!NILP (list
))
3667 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
3669 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
3675 /* Delete any zero-sized overlays at position POS, if the `evaporate'
3678 evaporate_overlays (pos
)
3681 Lisp_Object tail
, overlay
, hit_list
;
3684 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
3685 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
3686 tail
= XCONS (tail
)->cdr
)
3689 overlay
= XCONS (tail
)->car
;
3690 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3693 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
3694 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3695 hit_list
= Fcons (overlay
, hit_list
);
3698 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
3699 tail
= XCONS (tail
)->cdr
)
3702 overlay
= XCONS (tail
)->car
;
3703 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3706 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
3707 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3708 hit_list
= Fcons (overlay
, hit_list
);
3710 for (; CONSP (hit_list
); hit_list
= XCONS (hit_list
)->cdr
)
3711 Fdelete_overlay (XCONS (hit_list
)->car
);
3714 /* Somebody has tried to store a value with an unacceptable type
3715 into the buffer-local slot with offset OFFSET. */
3717 buffer_slot_type_mismatch (offset
)
3722 sym
= *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
);
3723 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
3725 case Lisp_Int
: type_name
= "integers"; break;
3726 case Lisp_String
: type_name
= "strings"; break;
3727 case Lisp_Symbol
: type_name
= "symbols"; break;
3732 error ("only %s should be stored in the buffer-local variable %s",
3733 type_name
, XSYMBOL (sym
)->name
->data
);
3738 register Lisp_Object tem
;
3740 buffer_permanent_local_flags
= 0;
3742 /* Make sure all markable slots in buffer_defaults
3743 are initialized reasonably, so mark_buffer won't choke. */
3744 reset_buffer (&buffer_defaults
);
3745 reset_buffer_local_variables (&buffer_defaults
, 1);
3746 reset_buffer (&buffer_local_symbols
);
3747 reset_buffer_local_variables (&buffer_local_symbols
, 1);
3748 /* Prevent GC from getting confused. */
3749 buffer_defaults
.text
= &buffer_defaults
.own_text
;
3750 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
3751 #ifdef USE_TEXT_PROPERTIES
3752 BUF_INTERVALS (&buffer_defaults
) = 0;
3753 BUF_INTERVALS (&buffer_local_symbols
) = 0;
3755 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
3756 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
3758 /* Set up the default values of various buffer slots. */
3759 /* Must do these before making the first buffer! */
3761 /* real setup is done in loaddefs.el */
3762 buffer_defaults
.mode_line_format
= build_string ("%-");
3763 buffer_defaults
.abbrev_mode
= Qnil
;
3764 buffer_defaults
.overwrite_mode
= Qnil
;
3765 buffer_defaults
.case_fold_search
= Qt
;
3766 buffer_defaults
.auto_fill_function
= Qnil
;
3767 buffer_defaults
.selective_display
= Qnil
;
3769 buffer_defaults
.selective_display_ellipses
= Qt
;
3771 buffer_defaults
.abbrev_table
= Qnil
;
3772 buffer_defaults
.display_table
= Qnil
;
3773 buffer_defaults
.undo_list
= Qnil
;
3774 buffer_defaults
.mark_active
= Qnil
;
3775 buffer_defaults
.file_format
= Qnil
;
3776 buffer_defaults
.overlays_before
= Qnil
;
3777 buffer_defaults
.overlays_after
= Qnil
;
3778 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
3780 XSETFASTINT (buffer_defaults
.tab_width
, 8);
3781 buffer_defaults
.truncate_lines
= Qnil
;
3782 buffer_defaults
.ctl_arrow
= Qt
;
3783 buffer_defaults
.direction_reversed
= Qnil
;
3786 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
3788 buffer_defaults
.enable_multibyte_characters
= Qt
;
3789 buffer_defaults
.buffer_file_coding_system
= Qnil
;
3790 XSETFASTINT (buffer_defaults
.fill_column
, 70);
3791 XSETFASTINT (buffer_defaults
.left_margin
, 0);
3792 buffer_defaults
.cache_long_line_scans
= Qnil
;
3793 buffer_defaults
.file_truename
= Qnil
;
3794 XSETFASTINT (buffer_defaults
.display_count
, 0);
3796 /* Assign the local-flags to the slots that have default values.
3797 The local flag is a bit that is used in the buffer
3798 to say that it has its own local value for the slot.
3799 The local flag bits are in the local_var_flags slot of the buffer. */
3801 /* Nothing can work if this isn't true */
3802 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
3804 /* 0 means not a lisp var, -1 means always local, else mask */
3805 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
3806 XSETINT (buffer_local_flags
.filename
, -1);
3807 XSETINT (buffer_local_flags
.directory
, -1);
3808 XSETINT (buffer_local_flags
.backed_up
, -1);
3809 XSETINT (buffer_local_flags
.save_length
, -1);
3810 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
3811 XSETINT (buffer_local_flags
.read_only
, -1);
3812 XSETINT (buffer_local_flags
.major_mode
, -1);
3813 XSETINT (buffer_local_flags
.mode_name
, -1);
3814 XSETINT (buffer_local_flags
.undo_list
, -1);
3815 XSETINT (buffer_local_flags
.mark_active
, -1);
3816 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
3817 XSETINT (buffer_local_flags
.file_truename
, -1);
3818 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
3819 XSETINT (buffer_local_flags
.file_format
, -1);
3820 XSETINT (buffer_local_flags
.display_count
, -1);
3822 XSETFASTINT (buffer_local_flags
.mode_line_format
, 1);
3823 XSETFASTINT (buffer_local_flags
.abbrev_mode
, 2);
3824 XSETFASTINT (buffer_local_flags
.overwrite_mode
, 4);
3825 XSETFASTINT (buffer_local_flags
.case_fold_search
, 8);
3826 XSETFASTINT (buffer_local_flags
.auto_fill_function
, 0x10);
3827 XSETFASTINT (buffer_local_flags
.selective_display
, 0x20);
3829 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, 0x40);
3831 XSETFASTINT (buffer_local_flags
.tab_width
, 0x80);
3832 XSETFASTINT (buffer_local_flags
.truncate_lines
, 0x100);
3833 XSETFASTINT (buffer_local_flags
.ctl_arrow
, 0x200);
3834 XSETFASTINT (buffer_local_flags
.fill_column
, 0x400);
3835 XSETFASTINT (buffer_local_flags
.left_margin
, 0x800);
3836 XSETFASTINT (buffer_local_flags
.abbrev_table
, 0x1000);
3837 XSETFASTINT (buffer_local_flags
.display_table
, 0x2000);
3839 XSETFASTINT (buffer_local_flags
.buffer_file_type
, 0x4000);
3840 /* Make this one a permanent local. */
3841 buffer_permanent_local_flags
|= 0x4000;
3843 XSETFASTINT (buffer_local_flags
.syntax_table
, 0x8000);
3844 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, 0x10000);
3845 XSETFASTINT (buffer_local_flags
.category_table
, 0x20000);
3846 XSETFASTINT (buffer_local_flags
.direction_reversed
, 0x40000);
3847 XSETFASTINT (buffer_local_flags
.enable_multibyte_characters
, 0x80000);
3848 /* Make this one a permanent local. */
3849 buffer_permanent_local_flags
|= 0x80000;
3850 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, 0x100000);
3851 /* Make this one a permanent local. */
3852 buffer_permanent_local_flags
|= 0x100000;
3854 Vbuffer_alist
= Qnil
;
3858 QSFundamental
= build_string ("Fundamental");
3860 Qfundamental_mode
= intern ("fundamental-mode");
3861 buffer_defaults
.major_mode
= Qfundamental_mode
;
3863 Qmode_class
= intern ("mode-class");
3865 Qprotected_field
= intern ("protected-field");
3867 Qpermanent_local
= intern ("permanent-local");
3869 Qkill_buffer_hook
= intern ("kill-buffer-hook");
3871 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
3873 /* super-magic invisible buffer */
3874 Vbuffer_alist
= Qnil
;
3876 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3881 char buf
[MAXPATHLEN
+1];
3883 struct stat dotstat
, pwdstat
;
3887 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3889 /* If PWD is accurate, use it instead of calling getwd. This is faster
3890 when PWD is right, and may avoid a fatal error. */
3891 if ((pwd
= getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd
)
3892 && stat (pwd
, &pwdstat
) == 0
3893 && stat (".", &dotstat
) == 0
3894 && dotstat
.st_ino
== pwdstat
.st_ino
3895 && dotstat
.st_dev
== pwdstat
.st_dev
3896 && strlen (pwd
) < MAXPATHLEN
)
3899 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
3900 fatal ("`getcwd' failed: %s\n", strerror (errno
));
3902 else if (getwd (buf
) == 0)
3903 fatal ("`getwd' failed: %s\n", buf
);
3907 /* Maybe this should really use some standard subroutine
3908 whose definition is filename syntax dependent. */
3910 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
3912 buf
[rc
] = DIRECTORY_SEP
;
3915 #endif /* not VMS */
3917 current_buffer
->directory
= build_string (buf
);
3919 /* Add /: to the front of the name
3920 if it would otherwise be treated as magic. */
3921 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
3923 /* If the default dir is just /, TEMP is non-nil
3924 because of the ange-ftp completion handler.
3925 However, it is not necessary to turn / into /:/.
3926 So avoid doing that. */
3927 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
3928 current_buffer
->directory
3929 = concat2 (build_string ("/:"), current_buffer
->directory
);
3931 temp
= get_minibuffer (0);
3932 XBUFFER (temp
)->directory
= current_buffer
->directory
;
3935 /* initialize the buffer routines */
3938 extern Lisp_Object Qdisabled
;
3940 staticpro (&last_overlay_modification_hooks
);
3941 last_overlay_modification_hooks
3942 = Fmake_vector (make_number (10), Qnil
);
3944 staticpro (&Vbuffer_defaults
);
3945 staticpro (&Vbuffer_local_symbols
);
3946 staticpro (&Qfundamental_mode
);
3947 staticpro (&Qmode_class
);
3948 staticpro (&QSFundamental
);
3949 staticpro (&Vbuffer_alist
);
3950 staticpro (&Qprotected_field
);
3951 staticpro (&Qpermanent_local
);
3952 staticpro (&Qkill_buffer_hook
);
3953 Qoverlayp
= intern ("overlayp");
3954 staticpro (&Qoverlayp
);
3955 Qevaporate
= intern ("evaporate");
3956 staticpro (&Qevaporate
);
3957 Qmodification_hooks
= intern ("modification-hooks");
3958 staticpro (&Qmodification_hooks
);
3959 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
3960 staticpro (&Qinsert_in_front_hooks
);
3961 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
3962 staticpro (&Qinsert_behind_hooks
);
3963 Qget_file_buffer
= intern ("get-file-buffer");
3964 staticpro (&Qget_file_buffer
);
3965 Qpriority
= intern ("priority");
3966 staticpro (&Qpriority
);
3967 Qwindow
= intern ("window");
3968 staticpro (&Qwindow
);
3969 Qbefore_string
= intern ("before-string");
3970 staticpro (&Qbefore_string
);
3971 Qafter_string
= intern ("after-string");
3972 staticpro (&Qafter_string
);
3973 Qfirst_change_hook
= intern ("first-change-hook");
3974 staticpro (&Qfirst_change_hook
);
3975 Qbefore_change_functions
= intern ("before-change-functions");
3976 staticpro (&Qbefore_change_functions
);
3977 Qafter_change_functions
= intern ("after-change-functions");
3978 staticpro (&Qafter_change_functions
);
3980 Fput (Qprotected_field
, Qerror_conditions
,
3981 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
3982 Fput (Qprotected_field
, Qerror_message
,
3983 build_string ("Attempt to modify a protected field"));
3985 /* All these use DEFVAR_LISP_NOPRO because the slots in
3986 buffer_defaults will all be marked via Vbuffer_defaults. */
3988 DEFVAR_LISP_NOPRO ("default-mode-line-format",
3989 &buffer_defaults
.mode_line_format
,
3990 "Default value of `mode-line-format' for buffers that don't override it.\n\
3991 This is the same as (default-value 'mode-line-format).");
3993 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
3994 &buffer_defaults
.abbrev_mode
,
3995 "Default value of `abbrev-mode' for buffers that do not override it.\n\
3996 This is the same as (default-value 'abbrev-mode).");
3998 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
3999 &buffer_defaults
.ctl_arrow
,
4000 "Default value of `ctl-arrow' for buffers that do not override it.\n\
4001 This is the same as (default-value 'ctl-arrow).");
4003 DEFVAR_LISP_NOPRO ("default-direction-reversed",
4004 &buffer_defaults
.direction_reversed
,
4005 "Default value of `direction_reversed' for buffers that do not override it.\n\
4006 This is the same as (default-value 'direction-reversed).");
4008 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
4009 &buffer_defaults
.enable_multibyte_characters
,
4010 "Default value of `enable-multibyte-characters' for buffers not overriding it.\n\
4011 This is the same as (default-value 'enable-multibyte-characters).");
4013 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
4014 &buffer_defaults
.buffer_file_coding_system
,
4015 "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\
4016 This is the same as (default-value 'buffer-file-coding-system).");
4018 DEFVAR_LISP_NOPRO ("default-truncate-lines",
4019 &buffer_defaults
.truncate_lines
,
4020 "Default value of `truncate-lines' for buffers that do not override it.\n\
4021 This is the same as (default-value 'truncate-lines).");
4023 DEFVAR_LISP_NOPRO ("default-fill-column",
4024 &buffer_defaults
.fill_column
,
4025 "Default value of `fill-column' for buffers that do not override it.\n\
4026 This is the same as (default-value 'fill-column).");
4028 DEFVAR_LISP_NOPRO ("default-left-margin",
4029 &buffer_defaults
.left_margin
,
4030 "Default value of `left-margin' for buffers that do not override it.\n\
4031 This is the same as (default-value 'left-margin).");
4033 DEFVAR_LISP_NOPRO ("default-tab-width",
4034 &buffer_defaults
.tab_width
,
4035 "Default value of `tab-width' for buffers that do not override it.\n\
4036 This is the same as (default-value 'tab-width).");
4038 DEFVAR_LISP_NOPRO ("default-case-fold-search",
4039 &buffer_defaults
.case_fold_search
,
4040 "Default value of `case-fold-search' for buffers that don't override it.\n\
4041 This is the same as (default-value 'case-fold-search).");
4044 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
4045 &buffer_defaults
.buffer_file_type
,
4046 "Default file type for buffers that do not override it.\n\
4047 This is the same as (default-value 'buffer-file-type).\n\
4048 The file type is nil for text, t for binary.");
4051 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
4054 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
4055 But make-docfile finds it!
4056 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
4058 "Template for displaying mode line for current buffer.\n\
4059 Each buffer has its own value of this variable.\n\
4060 Value may be a string, a symbol or a list or cons cell.\n\
4061 For a symbol, its value is used (but it is ignored if t or nil).\n\
4062 A string appearing directly as the value of a symbol is processed verbatim\n\
4063 in that the %-constructs below are not recognized.\n\
4064 For a list whose car is a symbol, the symbol's value is taken,\n\
4065 and if that is non-nil, the cadr of the list is processed recursively.\n\
4066 Otherwise, the caddr of the list (if there is one) is processed.\n\
4067 For a list whose car is a string or list, each element is processed\n\
4068 recursively and the results are effectively concatenated.\n\
4069 For a list whose car is an integer, the cdr of the list is processed\n\
4070 and padded (if the number is positive) or truncated (if negative)\n\
4071 to the width specified by that number.\n\
4072 A string is printed verbatim in the mode line except for %-constructs:\n\
4073 (%-constructs are allowed when the string is the entire mode-line-format\n\
4074 or when it is found in a cons-cell or a list)\n\
4075 %b -- print buffer name. %f -- print visited file name.\n\
4076 %F -- print frame name.\n\
4077 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
4078 % means buffer is read-only and * means it is modified.\n\
4079 For a modified read-only buffer, %* gives % and %+ gives *.\n\
4080 %s -- print process status. %l -- print the current line number.\n\
4081 %c -- print the current column number (this makes editing slower).\n\
4082 To make the column number update correctly in all cases,\n\
4083 `column-number-mode' must be non-nil.\n\
4084 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
4085 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
4086 or print Bottom or All.\n\
4087 %n -- print Narrow if appropriate.\n\
4088 %t -- print T if file is text, B if binary.\n\
4089 %[ -- print one [ for each recursive editing level. %] similar.\n\
4090 %% -- print %. %- -- print infinitely many dashes.\n\
4091 Decimal digits after the % specify field width to which to pad.");
4094 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
4095 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
4096 nil here means use current buffer's major mode.");
4098 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
4099 make_number (Lisp_Symbol
),
4100 "Symbol for current buffer's major mode.");
4102 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
4103 make_number (Lisp_String
),
4104 "Pretty name of current buffer's major mode (a string).");
4106 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
4107 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
4108 Automatically becomes buffer-local when set in any fashion.");
4110 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
4112 "*Non-nil if searches should ignore case.\n\
4113 Automatically becomes buffer-local when set in any fashion.");
4115 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
4116 make_number (Lisp_Int
),
4117 "*Column beyond which automatic line-wrapping should happen.\n\
4118 Automatically becomes buffer-local when set in any fashion.");
4120 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
4121 make_number (Lisp_Int
),
4122 "*Column for the default indent-line-function to indent to.\n\
4123 Linefeed indents to this column in Fundamental mode.\n\
4124 Automatically becomes buffer-local when set in any fashion.");
4126 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
4127 make_number (Lisp_Int
),
4128 "*Distance between tab stops (for display of tab characters), in columns.\n\
4129 Automatically becomes buffer-local when set in any fashion.");
4131 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
4132 "*Non-nil means display control chars with uparrow.\n\
4133 A value of nil means use backslash and octal digits.\n\
4134 Automatically becomes buffer-local when set in any fashion.\n\
4135 This variable does not apply to characters whose display is specified\n\
4136 in the current display table (if there is one).");
4138 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
4139 ¤t_buffer
->enable_multibyte_characters
, Qnil
,
4140 "*Non-nil means the buffer contents are regarded as multi-byte form\n\
4141 of characters, not a binary code. This affects the display, file I/O,\n\
4142 and behaviors of various editing commands.");
4144 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
4145 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
4146 "Coding system to be used for encoding the buffer contents on saving.\n\
4147 If it is nil, the buffer is saved without any code conversion unless\n\
4148 some coding system is specified in file-coding-system-alist\n\
4149 for the buffer file.\n\
4151 This variable is never applied to a way of decoding\n\
4152 a file while reading it.");
4154 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
4156 "*Non-nil means lines in the buffer are displayed right to left.");
4158 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
4159 "*Non-nil means do not display continuation lines;\n\
4160 give each line of text one screen line.\n\
4161 Automatically becomes buffer-local when set in any fashion.\n\
4163 Note that this is overridden by the variable\n\
4164 `truncate-partial-width-windows' if that variable is non-nil\n\
4165 and this buffer is not full-frame width.");
4168 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
4170 "Non-nil if the visited file is a binary file.\n\
4171 This variable is meaningful on MS-DOG and Windows NT.\n\
4172 On those systems, it is automatically local in every buffer.\n\
4173 On other systems, this variable is normally always nil.");
4176 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
4177 make_number (Lisp_String
),
4178 "Name of default directory of current buffer. Should end with slash.\n\
4179 Each buffer has its own value of this variable.");
4181 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
4183 "Function called (if non-nil) to perform auto-fill.\n\
4184 It is called after self-inserting a space or newline.\n\
4185 Each buffer has its own value of this variable.\n\
4186 NOTE: This variable is not a hook;\n\
4187 its value may not be a list of functions.");
4189 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
4190 make_number (Lisp_String
),
4191 "Name of file visited in current buffer, or nil if not visiting a file.\n\
4192 Each buffer has its own value of this variable.");
4194 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
4195 make_number (Lisp_String
),
4196 "Abbreviated truename of file visited in current buffer, or nil if none.\n\
4197 The truename of a file is calculated by `file-truename'\n\
4198 and then abbreviated with `abbreviate-file-name'.\n\
4199 Each buffer has its own value of this variable.");
4201 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
4202 ¤t_buffer
->auto_save_file_name
,
4203 make_number (Lisp_String
),
4204 "Name of file for auto-saving current buffer,\n\
4205 or nil if buffer should not be auto-saved.\n\
4206 Each buffer has its own value of this variable.");
4208 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
4209 "Non-nil if this buffer is read-only.\n\
4210 Each buffer has its own value of this variable.");
4212 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
4213 "Non-nil if this buffer's file has been backed up.\n\
4214 Backing up is done before the first time the file is saved.\n\
4215 Each buffer has its own value of this variable.");
4217 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
4218 make_number (Lisp_Int
),
4219 "Length of current buffer when last read in, saved or auto-saved.\n\
4221 Each buffer has its own value of this variable.");
4223 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
4225 "Non-nil enables selective display:\n\
4226 Integer N as value means display only lines\n\
4227 that start with less than n columns of space.\n\
4228 A value of t means, after a ^M, all the rest of the line is invisible.\n\
4229 Then ^M's in the file are written into files as newlines.\n\n\
4230 Automatically becomes buffer-local when set in any fashion.");
4233 DEFVAR_PER_BUFFER ("selective-display-ellipses",
4234 ¤t_buffer
->selective_display_ellipses
,
4236 "t means display ... on previous line when a line is invisible.\n\
4237 Automatically becomes buffer-local when set in any fashion.");
4240 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
4241 "Non-nil if self-insertion should replace existing text.\n\
4242 The value should be one of `overwrite-mode-textual',\n\
4243 `overwrite-mode-binary', or nil.\n\
4244 If it is `overwrite-mode-textual', self-insertion still\n\
4245 inserts at the end of a line, and inserts when point is before a tab,\n\
4246 until the tab is filled in.\n\
4247 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
4248 Automatically becomes buffer-local when set in any fashion.");
4250 #if 0 /* The doc string is too long for some compilers,
4251 but make-docfile can find it in this comment. */
4252 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4254 "Display table that controls display of the contents of current buffer.\n\
4255 Automatically becomes buffer-local when set in any fashion.\n\
4256 The display table is a char-table created with `make-display-table'.\n\
4257 The ordinary char-table elements control how to display each possible text\n\
4258 character. Each value should be a vector of characters or nil;\n\
4259 nil means display the character in the default fashion.\n\
4260 There are six extra slots to control the display of\n\
4261 the end of a truncated screen line (extra-slot 0, a single character);\n\
4262 the end of a continued line (extra-slot 1, a single character);\n\
4263 the escape character used to display character codes in octal\n\
4264 (extra-slot 2, a single character);\n\
4265 the character used as an arrow for control characters (extra-slot 3,\n\
4266 a single character);\n\
4267 the decoration indicating the presence of invisible lines (extra-slot 4,\n\
4268 a vector of characters);\n\
4269 the character used to draw the border between side-by-side windows\n\
4270 (extra-slot 5, a single character).\n\
4271 See also the functions `display-table-slot' and `set-display-table-slot'.\n\
4272 If this variable is nil, the value of `standard-display-table' is used.\n\
4273 Each window can have its own, overriding display table.");
4275 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4278 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
4281 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
4282 "If non-nil, a function to call before each text change (obsolete).\n\
4283 Two arguments are passed to the function: the positions of\n\
4284 the beginning and end of the range of old text to be changed.\n\
4285 \(For an insertion, the beginning and end are at the same place.)\n\
4286 No information is given about the length of the text after the change.\n\
4288 Buffer changes made while executing the `before-change-function'\n\
4289 don't call any before-change or after-change functions.\n\
4290 That's because these variables are temporarily set to nil.\n\
4291 As a result, a hook function cannot straightforwardly alter the value of\n\
4292 these variables. See the Emacs Lisp manual for a way of\n\
4293 accomplishing an equivalent result by using other variables.\n\n\
4294 This variable is obsolete; use `before-change-functions' instead.");
4295 Vbefore_change_function
= Qnil
;
4297 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
4298 "If non-nil, a Function to call after each text change (obsolete).\n\
4299 Three arguments are passed to the function: the positions of\n\
4300 the beginning and end of the range of changed text,\n\
4301 and the length of the pre-change text replaced by that range.\n\
4302 \(For an insertion, the pre-change length is zero;\n\
4303 for a deletion, that length is the number of bytes deleted,\n\
4304 and the post-change beginning and end are at the same place.)\n\
4306 Buffer changes made while executing the `after-change-function'\n\
4307 don't call any before-change or after-change functions.\n\
4308 That's because these variables are temporarily set to nil.\n\
4309 As a result, a hook function cannot straightforwardly alter the value of\n\
4310 these variables. See the Emacs Lisp manual for a way of\n\
4311 accomplishing an equivalent result by using other variables.\n\n\
4312 This variable is obsolete; use `after-change-functions' instead.");
4313 Vafter_change_function
= Qnil
;
4315 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
4316 "List of functions to call before each text change.\n\
4317 Two arguments are passed to each function: the positions of\n\
4318 the beginning and end of the range of old text to be changed.\n\
4319 \(For an insertion, the beginning and end are at the same place.)\n\
4320 No information is given about the length of the text after the change.\n\
4322 Buffer changes made while executing the `before-change-functions'\n\
4323 don't call any before-change or after-change functions.\n\
4324 That's because these variables are temporarily set to nil.\n\
4325 As a result, a hook function cannot straightforwardly alter the value of\n\
4326 these variables. See the Emacs Lisp manual for a way of\n\
4327 accomplishing an equivalent result by using other variables.");
4328 Vbefore_change_functions
= Qnil
;
4330 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
4331 "List of function to call after each text change.\n\
4332 Three arguments are passed to each function: the positions of\n\
4333 the beginning and end of the range of changed text,\n\
4334 and the length in bytes of the pre-change text replaced by that range.\n\
4335 \(For an insertion, the pre-change length is zero;\n\
4336 for a deletion, that length is the number of bytes deleted,\n\
4337 and the post-change beginning and end are at the same place.)\n\
4339 Buffer changes made while executing the `after-change-functions'\n\
4340 don't call any before-change or after-change functions.\n\
4341 That's because these variables are temporarily set to nil.\n\
4342 As a result, a hook function cannot straightforwardly alter the value of\n\
4343 these variables. See the Emacs Lisp manual for a way of\n\
4344 accomplishing an equivalent result by using other variables.");
4346 Vafter_change_functions
= Qnil
;
4348 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
4349 "A list of functions to call before changing a buffer which is unmodified.\n\
4350 The functions are run using the `run-hooks' function.");
4351 Vfirst_change_hook
= Qnil
;
4353 #if 0 /* The doc string is too long for some compilers,
4354 but make-docfile can find it in this comment. */
4355 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4356 "List of undo entries in current buffer.\n\
4357 Recent changes come first; older changes follow newer.\n\
4359 An entry (BEG . END) represents an insertion which begins at\n\
4360 position BEG and ends at position END.\n\
4362 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
4363 from (abs POSITION). If POSITION is positive, point was at the front\n\
4364 of the text being deleted; if negative, point was at the end.\n\
4366 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
4367 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
4368 of the visited file's modification time, as of that time. If the\n\
4369 modification time of the most recent save is different, this entry is\n\
4372 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
4373 was modified between BEG and END. PROPERTY is the property name,\n\
4374 and VALUE is the old value.\n\
4376 An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
4377 was adjusted in position by the offset DISTANCE (an integer).\n\
4379 An entry of the form POSITION indicates that point was at the buffer\n\
4380 location given by the integer. Undoing an entry of this form places\n\
4381 point at POSITION.\n\
4383 nil marks undo boundaries. The undo command treats the changes\n\
4384 between two undo boundaries as a single step to be undone.\n\
4386 If the value of the variable is t, undo information is not recorded.");
4388 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4391 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
4392 "Non-nil means the mark and region are currently active in this buffer.\n\
4393 Automatically local in all buffers.");
4395 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
4396 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
4397 This variable is buffer-local, in all buffers.\n\
4399 Normally, the line-motion functions work by scanning the buffer for\n\
4400 newlines. Columnar operations (like move-to-column and\n\
4401 compute-motion) also work by scanning the buffer, summing character\n\
4402 widths as they go. This works well for ordinary text, but if the\n\
4403 buffer's lines are very long (say, more than 500 characters), these\n\
4404 motion functions will take longer to execute. Emacs may also take\n\
4405 longer to update the display.\n\
4407 If cache-long-line-scans is non-nil, these motion functions cache the\n\
4408 results of their scans, and consult the cache to avoid rescanning\n\
4409 regions of the buffer until the text is modified. The caches are most\n\
4410 beneficial when they prevent the most searching---that is, when the\n\
4411 buffer contains long lines and large regions of characters with the\n\
4412 same, fixed screen width.\n\
4414 When cache-long-line-scans is non-nil, processing short lines will\n\
4415 become slightly slower (because of the overhead of consulting the\n\
4416 cache), and the caches will use memory roughly proportional to the\n\
4417 number of newlines and characters whose screen width varies.\n\
4419 The caches require no explicit maintenance; their accuracy is\n\
4420 maintained internally by the Emacs primitives. Enabling or disabling\n\
4421 the cache should not affect the behavior of any of the motion\n\
4422 functions; it should only affect their performance.");
4424 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
4425 "Value of point before the last series of scroll operations, or nil.");
4427 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
4428 "List of formats to use when saving this buffer.\n\
4429 Formats are defined by `format-alist'. This variable is\n\
4430 set when a file is visited. Automatically local in all buffers.");
4432 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
4433 ¤t_buffer
->invisibility_spec
, Qnil
,
4434 "Invisibility spec of this buffer.\n\
4435 The default is t, which means that text is invisible\n\
4436 if it has a non-nil `invisible' property.\n\
4437 If the value is a list, a text character is invisible if its `invisible'\n\
4438 property is an element in that list.\n\
4439 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
4440 then characters with property value PROP are invisible,\n\
4441 and they have an ellipsis as well if ELLIPSIS is non-nil.");
4443 DEFVAR_PER_BUFFER ("buffer-display-count",
4444 ¤t_buffer
->display_count
, Qnil
,
4445 "A number incremented each time the buffer is displayed in a window.");
4447 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
4448 "*Non-nil means deactivate the mark when the buffer contents change.\n\
4449 Non-nil also enables highlighting of the region whenever the mark is active.\n\
4450 The variable `highlight-nonselected-windows' controls whether to highlight\n\
4451 all windows or just the selected window.");
4452 Vtransient_mark_mode
= Qnil
;
4454 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
4455 "*Non-nil means disregard read-only status of buffers or characters.\n\
4456 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
4457 text properties. If the value is a list, disregard `buffer-read-only'\n\
4458 and disregard a `read-only' text property if the property value\n\
4459 is a member of the list.");
4460 Vinhibit_read_only
= Qnil
;
4462 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
4463 "List of functions called with no args to query before killing a buffer.");
4464 Vkill_buffer_query_functions
= Qnil
;
4466 defsubr (&Sbuffer_live_p
);
4467 defsubr (&Sbuffer_list
);
4468 defsubr (&Sget_buffer
);
4469 defsubr (&Sget_file_buffer
);
4470 defsubr (&Sget_buffer_create
);
4471 defsubr (&Smake_indirect_buffer
);
4472 defsubr (&Sgenerate_new_buffer_name
);
4473 defsubr (&Sbuffer_name
);
4474 /*defsubr (&Sbuffer_number);*/
4475 defsubr (&Sbuffer_file_name
);
4476 defsubr (&Sbuffer_base_buffer
);
4477 defsubr (&Sbuffer_local_variables
);
4478 defsubr (&Sbuffer_modified_p
);
4479 defsubr (&Sset_buffer_modified_p
);
4480 defsubr (&Sbuffer_modified_tick
);
4481 defsubr (&Srename_buffer
);
4482 defsubr (&Sother_buffer
);
4483 defsubr (&Sbuffer_disable_undo
);
4484 defsubr (&Sbuffer_enable_undo
);
4485 defsubr (&Skill_buffer
);
4486 defsubr (&Sset_buffer_major_mode
);
4487 defsubr (&Sswitch_to_buffer
);
4488 defsubr (&Spop_to_buffer
);
4489 defsubr (&Scurrent_buffer
);
4490 defsubr (&Sset_buffer
);
4491 defsubr (&Sbarf_if_buffer_read_only
);
4492 defsubr (&Sbury_buffer
);
4493 defsubr (&Serase_buffer
);
4494 defsubr (&Sset_buffer_multibyte
);
4495 defsubr (&Skill_all_local_variables
);
4497 defsubr (&Soverlayp
);
4498 defsubr (&Smake_overlay
);
4499 defsubr (&Sdelete_overlay
);
4500 defsubr (&Smove_overlay
);
4501 defsubr (&Soverlay_start
);
4502 defsubr (&Soverlay_end
);
4503 defsubr (&Soverlay_buffer
);
4504 defsubr (&Soverlay_properties
);
4505 defsubr (&Soverlays_at
);
4506 defsubr (&Soverlays_in
);
4507 defsubr (&Snext_overlay_change
);
4508 defsubr (&Sprevious_overlay_change
);
4509 defsubr (&Soverlay_recenter
);
4510 defsubr (&Soverlay_lists
);
4511 defsubr (&Soverlay_get
);
4512 defsubr (&Soverlay_put
);
4517 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
4518 initial_define_key (control_x_map
, 'k', "kill-buffer");
4520 /* This must not be in syms_of_buffer, because Qdisabled is not
4521 initialized when that function gets called. */
4522 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);