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 (except nil is always allowed).
104 When a tag does not match, the function
105 buffer_slot_type_mismatch will signal an error.
107 If a slot here contains -1, the corresponding variable is read-only. */
108 struct buffer buffer_local_types
;
110 /* Flags indicating which built-in buffer-local variables
111 are permanent locals. */
112 static int buffer_permanent_local_flags
;
114 Lisp_Object
Fset_buffer ();
115 void set_buffer_internal ();
116 void set_buffer_internal_1 ();
117 static void call_overlay_mod_hooks ();
118 static void swap_out_buffer_local_variables ();
119 static void reset_buffer_local_variables ();
121 /* Alist of all buffer names vs the buffers. */
122 /* This used to be a variable, but is no longer,
123 to prevent lossage due to user rplac'ing this alist or its elements. */
124 Lisp_Object Vbuffer_alist
;
126 /* Functions to call before and after each text change. */
127 Lisp_Object Vbefore_change_function
;
128 Lisp_Object Vafter_change_function
;
129 Lisp_Object Vbefore_change_functions
;
130 Lisp_Object Vafter_change_functions
;
132 Lisp_Object Vtransient_mark_mode
;
134 /* t means ignore all read-only text properties.
135 A list means ignore such a property if its value is a member of the list.
136 Any non-nil value means ignore buffer-read-only. */
137 Lisp_Object Vinhibit_read_only
;
139 /* List of functions to call that can query about killing a buffer.
140 If any of these functions returns nil, we don't kill it. */
141 Lisp_Object Vkill_buffer_query_functions
;
143 /* List of functions to call before changing an unmodified buffer. */
144 Lisp_Object Vfirst_change_hook
;
146 Lisp_Object Qfirst_change_hook
;
147 Lisp_Object Qbefore_change_functions
;
148 Lisp_Object Qafter_change_functions
;
150 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
152 Lisp_Object Qprotected_field
;
154 Lisp_Object QSFundamental
; /* A string "Fundamental" */
156 Lisp_Object Qkill_buffer_hook
;
158 Lisp_Object Qget_file_buffer
;
160 Lisp_Object Qoverlayp
;
162 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
164 Lisp_Object Qmodification_hooks
;
165 Lisp_Object Qinsert_in_front_hooks
;
166 Lisp_Object Qinsert_behind_hooks
;
168 /* For debugging; temporary. See set_buffer_internal. */
169 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
176 error ("No buffer named %s", XSTRING (spec
)->data
);
177 error ("Invalid buffer argument");
180 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
181 "Return non-nil if OBJECT is a buffer which has not been killed.\n\
182 Value is nil if OBJECT is not a buffer or if it has been killed.")
186 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
190 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
191 "Return a list of all existing live buffers.\n\
192 If the optional arg FRAME is a frame, we return that frame's buffer list.")
196 Lisp_Object framelist
, general
;
197 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
203 CHECK_FRAME (frame
, 1);
205 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
207 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
209 while (! NILP (tail
))
211 general
= Fdelq (XCONS (tail
)->car
, general
);
212 tail
= XCONS (tail
)->cdr
;
214 return nconc2 (framelist
, general
);
220 /* Like Fassoc, but use Fstring_equal to compare
221 (which ignores text properties),
222 and don't ever QUIT. */
225 assoc_ignore_text_properties (key
, list
)
226 register Lisp_Object key
;
229 register Lisp_Object tail
;
230 for (tail
= list
; !NILP (tail
); tail
= Fcdr (tail
))
232 register Lisp_Object elt
, tem
;
234 tem
= Fstring_equal (Fcar (elt
), key
);
241 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
242 "Return the buffer named NAME (a string).\n\
243 If there is no live buffer named NAME, return nil.\n\
244 NAME may also be a buffer; if so, the value is that buffer.")
246 register Lisp_Object name
;
250 CHECK_STRING (name
, 0);
252 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
255 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
256 "Return the buffer visiting file FILENAME (a string).\n\
257 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
258 If there is no such live buffer, return nil.\n\
259 See also `find-buffer-visiting'.")
261 register Lisp_Object filename
;
263 register Lisp_Object tail
, buf
, tem
;
266 CHECK_STRING (filename
, 0);
267 filename
= Fexpand_file_name (filename
, Qnil
);
269 /* If the file name has special constructs in it,
270 call the corresponding file handler. */
271 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
273 return call2 (handler
, Qget_file_buffer
, filename
);
275 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
277 buf
= Fcdr (XCONS (tail
)->car
);
278 if (!BUFFERP (buf
)) continue;
279 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
280 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
288 get_truename_buffer (filename
)
289 register Lisp_Object filename
;
291 register Lisp_Object tail
, buf
, tem
;
293 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
295 buf
= Fcdr (XCONS (tail
)->car
);
296 if (!BUFFERP (buf
)) continue;
297 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
298 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
305 /* Incremented for each buffer created, to assign the buffer number. */
308 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
309 "Return the buffer named NAME, or create such a buffer and return it.\n\
310 A new buffer is created if there is no live buffer named NAME.\n\
311 If NAME starts with a space, the new buffer does not keep undo information.\n\
312 If NAME is a buffer instead of a string, then it is the value returned.\n\
313 The value is never nil.")
315 register Lisp_Object name
;
317 register Lisp_Object buf
;
318 register struct buffer
*b
;
320 buf
= Fget_buffer (name
);
324 if (XSTRING (name
)->size
== 0)
325 error ("Empty string for buffer name is not allowed");
327 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
329 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
331 /* An ordinary buffer uses its own struct buffer_text. */
332 b
->text
= &b
->own_text
;
335 BUF_GAP_SIZE (b
) = 20;
337 /* We allocate extra 1-byte at the tail and keep it always '\0' for
338 anchoring a search. */
339 BUFFER_ALLOC (BUF_BEG_ADDR (b
), (BUF_GAP_SIZE (b
) + 1));
341 if (! BUF_BEG_ADDR (b
))
342 buffer_memory_full ();
350 BUF_GPT_BYTE (b
) = 1;
351 BUF_BEGV_BYTE (b
) = 1;
355 BUF_OVERLAY_MODIFF (b
) = 1;
356 BUF_SAVE_MODIFF (b
) = 1;
357 BUF_INTERVALS (b
) = 0;
358 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
360 b
->newline_cache
= 0;
361 b
->width_run_cache
= 0;
362 b
->width_table
= Qnil
;
364 /* Put this on the chain of all buffers including killed ones. */
365 b
->next
= all_buffers
;
368 /* An ordinary buffer normally doesn't need markers
369 to handle BEGV and ZV. */
371 b
->begv_marker
= Qnil
;
374 name
= Fcopy_sequence (name
);
375 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
378 if (XSTRING (name
)->data
[0] != ' ')
384 reset_buffer_local_variables (b
, 1);
386 /* Put this in the alist of all live buffers. */
388 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
390 b
->mark
= Fmake_marker ();
391 BUF_MARKERS (b
) = Qnil
;
396 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
, 2, 2,
397 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
398 "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\
399 BASE-BUFFER should be an existing buffer (or buffer name).\n\
400 NAME should be a string which is not the name of an existing buffer.")
402 register Lisp_Object base_buffer
, name
;
404 register Lisp_Object buf
;
405 register struct buffer
*b
;
407 buf
= Fget_buffer (name
);
409 error ("Buffer name `%s' is in use", XSTRING (name
)->data
);
411 base_buffer
= Fget_buffer (base_buffer
);
412 if (NILP (base_buffer
))
413 error ("No such buffer: `%s'",
414 XSTRING (XBUFFER (base_buffer
)->name
)->data
);
416 if (XSTRING (name
)->size
== 0)
417 error ("Empty string for buffer name is not allowed");
419 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
421 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
423 if (XBUFFER (base_buffer
)->base_buffer
)
424 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
426 b
->base_buffer
= XBUFFER (base_buffer
);
428 /* Use the base buffer's text object. */
429 b
->text
= b
->base_buffer
->text
;
431 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
432 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
433 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
434 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
435 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
436 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
438 b
->newline_cache
= 0;
439 b
->width_run_cache
= 0;
440 b
->width_table
= Qnil
;
442 /* Put this on the chain of all buffers including killed ones. */
443 b
->next
= all_buffers
;
446 name
= Fcopy_sequence (name
);
447 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
451 reset_buffer_local_variables (b
, 1);
453 /* Put this in the alist of all live buffers. */
455 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
457 b
->mark
= Fmake_marker ();
460 /* Make sure the base buffer has markers for its narrowing. */
461 if (NILP (b
->base_buffer
->pt_marker
))
463 b
->base_buffer
->pt_marker
= Fmake_marker ();
464 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
465 BUF_PT (b
->base_buffer
),
466 BUF_PT_BYTE (b
->base_buffer
));
468 if (NILP (b
->base_buffer
->begv_marker
))
470 b
->base_buffer
->begv_marker
= Fmake_marker ();
471 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
472 BUF_BEGV (b
->base_buffer
),
473 BUF_BEGV_BYTE (b
->base_buffer
));
475 if (NILP (b
->base_buffer
->zv_marker
))
477 b
->base_buffer
->zv_marker
= Fmake_marker ();
478 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
479 BUF_ZV (b
->base_buffer
),
480 BUF_ZV_BYTE (b
->base_buffer
));
481 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
484 /* Give the indirect buffer markers for its narrowing. */
485 b
->pt_marker
= Fmake_marker ();
486 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
487 b
->begv_marker
= Fmake_marker ();
488 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
489 b
->zv_marker
= Fmake_marker ();
490 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
491 XMARKER (b
->zv_marker
)->insertion_type
= 1;
496 /* Reinitialize everything about a buffer except its name and contents
497 and local variables. */
501 register struct buffer
*b
;
504 b
->file_truename
= Qnil
;
505 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
507 XSETFASTINT (b
->save_length
, 0);
508 b
->last_window_start
= 1;
509 /* It is more conservative to start out "changed" than "unchanged". */
512 b
->auto_save_modified
= 0;
513 b
->auto_save_failure_time
= -1;
514 b
->auto_save_file_name
= Qnil
;
516 b
->overlays_before
= Qnil
;
517 b
->overlays_after
= Qnil
;
518 XSETFASTINT (b
->overlay_center
, 1);
519 b
->mark_active
= Qnil
;
520 b
->point_before_scroll
= Qnil
;
521 b
->file_format
= Qnil
;
522 b
->last_selected_window
= Qnil
;
523 XSETINT (b
->display_count
, 0);
526 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
529 /* Reset buffer B's local variables info.
530 Don't use this on a buffer that has already been in use;
531 it does not treat permanent locals consistently.
532 Instead, use Fkill_all_local_variables.
534 If PERMANENT_TOO is 1, then we reset permanent built-in
535 buffer-local variables. If PERMANENT_TOO is 0,
536 we preserve those. */
539 reset_buffer_local_variables (b
, permanent_too
)
540 register struct buffer
*b
;
546 /* Decide which built-in local variables to reset. */
550 dont_reset
= buffer_permanent_local_flags
;
552 /* Reset the major mode to Fundamental, together with all the
553 things that depend on the major mode.
554 default-major-mode is handled at a higher level.
555 We ignore it here. */
556 b
->major_mode
= Qfundamental_mode
;
558 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
559 b
->mode_name
= QSFundamental
;
560 b
->minor_modes
= Qnil
;
562 /* If the standard case table has been altered and invalidated,
563 fix up its insides first. */
564 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
565 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
566 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
567 Fset_standard_case_table (Vascii_downcase_table
);
569 b
->downcase_table
= Vascii_downcase_table
;
570 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
571 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
572 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
573 b
->invisibility_spec
= Qt
;
575 b
->buffer_file_type
= Qnil
;
579 b
->sort_table
= XSTRING (Vascii_sort_table
);
580 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
583 /* Reset all (or most) per-buffer variables to their defaults. */
584 b
->local_var_alist
= Qnil
;
585 b
->local_var_flags
&= dont_reset
;
587 /* For each slot that has a default value,
588 copy that into the slot. */
590 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
591 offset
< sizeof (struct buffer
);
592 offset
+= sizeof (Lisp_Object
)) /* sizeof EMACS_INT == sizeof Lisp_Object */
594 int flag
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
596 /* Don't reset a permanent local. */
597 && ! (dont_reset
& flag
))
599 *(Lisp_Object
*)(offset
+ (char *)b
)
600 = *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
604 /* We split this away from generate-new-buffer, because rename-buffer
605 and set-visited-file-name ought to be able to use this to really
606 rename the buffer properly. */
608 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
610 "Return a string that is the name of no existing buffer based on NAME.\n\
611 If there is no live buffer named NAME, then return NAME.\n\
612 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
613 until an unused name is found, and then return that name.\n\
614 Optional second argument IGNORE specifies a name that is okay to use\n\
615 \(if it is in the sequence to be tried)\n\
616 even if a buffer with that name exists.")
618 register Lisp_Object name
, ignore
;
620 register Lisp_Object gentemp
, tem
;
624 CHECK_STRING (name
, 0);
626 tem
= Fget_buffer (name
);
633 sprintf (number
, "<%d>", ++count
);
634 gentemp
= concat2 (name
, build_string (number
));
635 tem
= Fstring_equal (gentemp
, ignore
);
638 tem
= Fget_buffer (gentemp
);
645 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
646 "Return the name of BUFFER, as a string.\n\
647 With no argument or nil as argument, return the name of the current buffer.")
649 register Lisp_Object buffer
;
652 return current_buffer
->name
;
653 CHECK_BUFFER (buffer
, 0);
654 return XBUFFER (buffer
)->name
;
657 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
658 "Return name of file BUFFER is visiting, or nil if none.\n\
659 No argument or nil as argument means use the current buffer.")
661 register Lisp_Object buffer
;
664 return current_buffer
->filename
;
665 CHECK_BUFFER (buffer
, 0);
666 return XBUFFER (buffer
)->filename
;
669 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
671 "Return the base buffer of indirect buffer BUFFER.\n\
672 If BUFFER is not indirect, return nil.")
674 register Lisp_Object buffer
;
677 Lisp_Object base_buffer
;
680 base
= current_buffer
->base_buffer
;
683 CHECK_BUFFER (buffer
, 0);
684 base
= XBUFFER (buffer
)->base_buffer
;
689 XSETBUFFER (base_buffer
, base
);
693 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
694 Sbuffer_local_variables
, 0, 1, 0,
695 "Return an alist of variables that are buffer-local in BUFFER.\n\
696 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
697 For a symbol that is locally unbound, just the symbol appears in the value.\n\
698 Note that storing new VALUEs in these elements doesn't change the variables.\n\
699 No argument or nil as argument means use current buffer as BUFFER.")
701 register Lisp_Object buffer
;
703 register struct buffer
*buf
;
704 register Lisp_Object result
;
707 buf
= current_buffer
;
710 CHECK_BUFFER (buffer
, 0);
711 buf
= XBUFFER (buffer
);
717 register Lisp_Object tail
;
718 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
720 Lisp_Object val
, elt
;
722 elt
= XCONS (tail
)->car
;
724 /* Reference each variable in the alist in buf.
725 If inquiring about the current buffer, this gets the current values,
726 so store them into the alist so the alist is up to date.
727 If inquiring about some other buffer, this swaps out any values
728 for that buffer, making the alist up to date automatically. */
729 val
= find_symbol_value (XCONS (elt
)->car
);
730 /* Use the current buffer value only if buf is the current buffer. */
731 if (buf
!= current_buffer
)
732 val
= XCONS (elt
)->cdr
;
734 /* If symbol is unbound, put just the symbol in the list. */
735 if (EQ (val
, Qunbound
))
736 result
= Fcons (XCONS (elt
)->car
, result
);
737 /* Otherwise, put (symbol . value) in the list. */
739 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
743 /* Add on all the variables stored in special slots. */
745 register int offset
, mask
;
747 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
748 offset
< sizeof (struct buffer
);
749 offset
+= (sizeof (EMACS_INT
))) /* sizeof EMACS_INT == sizeof Lisp_Object */
751 mask
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
752 if (mask
== -1 || (buf
->local_var_flags
& mask
))
753 if (SYMBOLP (*(Lisp_Object
*)(offset
754 + (char *)&buffer_local_symbols
)))
755 result
= Fcons (Fcons (*((Lisp_Object
*)
756 (offset
+ (char *)&buffer_local_symbols
)),
757 *(Lisp_Object
*)(offset
+ (char *)buf
)),
766 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
768 "Return t if BUFFER was modified since its file was last read or saved.\n\
769 No argument or nil as argument means use current buffer as BUFFER.")
771 register Lisp_Object buffer
;
773 register struct buffer
*buf
;
775 buf
= current_buffer
;
778 CHECK_BUFFER (buffer
, 0);
779 buf
= XBUFFER (buffer
);
782 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
785 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
787 "Mark current buffer as modified or unmodified according to FLAG.\n\
788 A non-nil FLAG means mark the buffer modified.")
790 register Lisp_Object flag
;
792 register int already
;
793 register Lisp_Object fn
;
795 #ifdef CLASH_DETECTION
796 /* If buffer becoming modified, lock the file.
797 If buffer becoming unmodified, unlock the file. */
799 fn
= current_buffer
->file_truename
;
802 already
= SAVE_MODIFF
< MODIFF
;
803 if (!already
&& !NILP (flag
))
805 else if (already
&& NILP (flag
))
808 #endif /* CLASH_DETECTION */
810 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
815 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
817 "Return BUFFER's tick counter, incremented for each change in text.\n\
818 Each buffer has a tick counter which is incremented each time the text in\n\
819 that buffer is changed. It wraps around occasionally.\n\
820 No argument or nil as argument means use current buffer as BUFFER.")
822 register Lisp_Object buffer
;
824 register struct buffer
*buf
;
826 buf
= current_buffer
;
829 CHECK_BUFFER (buffer
, 0);
830 buf
= XBUFFER (buffer
);
833 return make_number (BUF_MODIFF (buf
));
836 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
837 "sRename buffer (to new name): \nP",
838 "Change current buffer's name to NEWNAME (a string).\n\
839 If second arg UNIQUE is nil or omitted, it is an error if a\n\
840 buffer named NEWNAME already exists.\n\
841 If UNIQUE is non-nil, come up with a new name using\n\
842 `generate-new-buffer-name'.\n\
843 Interactively, you can set UNIQUE with a prefix argument.\n\
844 We return the name we actually gave the buffer.\n\
845 This does not change the name of the visited file (if any).")
847 register Lisp_Object newname
, unique
;
849 register Lisp_Object tem
, buf
;
851 CHECK_STRING (newname
, 0);
853 if (XSTRING (newname
)->size
== 0)
854 error ("Empty string is invalid as a buffer name");
856 tem
= Fget_buffer (newname
);
857 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
858 the buffer automatically so you can create another with the original name.
859 It makes UNIQUE equivalent to
860 (rename-buffer (generate-new-buffer-name NEWNAME)). */
861 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
862 return current_buffer
->name
;
866 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
868 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
871 current_buffer
->name
= newname
;
873 /* Catch redisplay's attention. Unless we do this, the mode lines for
874 any windows displaying current_buffer will stay unchanged. */
877 XSETBUFFER (buf
, current_buffer
);
878 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
879 if (NILP (current_buffer
->filename
)
880 && !NILP (current_buffer
->auto_save_file_name
))
881 call0 (intern ("rename-auto-save-file"));
882 /* Refetch since that last call may have done GC. */
883 return current_buffer
->name
;
886 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 2, 0,
887 "Return most recently selected buffer other than BUFFER.\n\
888 Buffers not visible in windows are preferred to visible buffers,\n\
889 unless optional second argument VISIBLE-OK is non-nil.\n\
890 If no other buffer exists, the buffer `*scratch*' is returned.\n\
891 If BUFFER is omitted or nil, some interesting buffer is returned.")
893 register Lisp_Object buffer
, visible_ok
;
895 Lisp_Object
Fset_buffer_major_mode ();
896 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
899 tail
= Vbuffer_alist
;
900 pred
= frame_buffer_predicate ();
902 /* Consider buffers that have been seen in the selected frame
903 before other buffers. */
905 tem
= frame_buffer_list ();
909 if (BUFFERP (XCONS (tem
)->car
))
910 add_ons
= Fcons (Fcons (Qnil
, XCONS (tem
)->car
), add_ons
);
911 tem
= XCONS (tem
)->cdr
;
913 tail
= nconc2 (Fnreverse (add_ons
), tail
);
915 for (; !NILP (tail
); tail
= Fcdr (tail
))
917 buf
= Fcdr (Fcar (tail
));
918 if (EQ (buf
, buffer
))
920 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
922 /* If the selected frame has a buffer_predicate,
923 disregard buffers that don't fit the predicate. */
926 tem
= call1 (pred
, buf
);
931 if (NILP (visible_ok
))
932 tem
= Fget_buffer_window (buf
, Qt
);
937 if (NILP (notsogood
))
940 if (!NILP (notsogood
))
942 buf
= Fget_buffer_create (build_string ("*scratch*"));
943 Fset_buffer_major_mode (buf
);
947 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
949 "Make BUFFER stop keeping undo information.\n\
950 No argument or nil as argument means do this for the current buffer.")
952 register Lisp_Object buffer
;
954 Lisp_Object real_buffer
;
957 XSETBUFFER (real_buffer
, current_buffer
);
960 real_buffer
= Fget_buffer (buffer
);
961 if (NILP (real_buffer
))
965 XBUFFER (real_buffer
)->undo_list
= Qt
;
970 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
972 "Start keeping undo information for buffer BUFFER.\n\
973 No argument or nil as argument means do this for the current buffer.")
975 register Lisp_Object buffer
;
977 Lisp_Object real_buffer
;
980 XSETBUFFER (real_buffer
, current_buffer
);
983 real_buffer
= Fget_buffer (buffer
);
984 if (NILP (real_buffer
))
988 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
989 XBUFFER (real_buffer
)->undo_list
= Qnil
;
995 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
996 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
997 The buffer being killed will be current while the hook is running.\n\
1000 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1001 "Kill the buffer BUFFER.\n\
1002 The argument may be a buffer or may be the name of a buffer.\n\
1003 An argument of nil means kill the current buffer.\n\n\
1004 Value is t if the buffer is actually killed, nil if user says no.\n\n\
1005 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
1006 if not void, is a list of functions to be called, with no arguments,\n\
1007 before the buffer is actually killed. The buffer to be killed is current\n\
1008 when the hook functions are called.\n\n\
1009 Any processes that have this buffer as the `process-buffer' are killed\n\
1015 register struct buffer
*b
;
1016 register Lisp_Object tem
;
1017 register struct Lisp_Marker
*m
;
1018 struct gcpro gcpro1
, gcpro2
;
1021 buf
= Fcurrent_buffer ();
1023 buf
= Fget_buffer (buffer
);
1029 /* Avoid trouble for buffer already dead. */
1033 /* Query if the buffer is still modified. */
1034 if (INTERACTIVE
&& !NILP (b
->filename
)
1035 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1038 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
1039 XSTRING (b
->name
)->data
));
1045 /* Run hooks with the buffer to be killed the current buffer. */
1047 register Lisp_Object val
;
1048 int count
= specpdl_ptr
- specpdl
;
1051 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1052 set_buffer_internal (b
);
1054 /* First run the query functions; if any query is answered no,
1055 don't kill the buffer. */
1056 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
1058 tem
= call0 (Fcar (list
));
1060 return unbind_to (count
, Qnil
);
1063 /* Then run the hooks. */
1064 if (!NILP (Vrun_hooks
))
1065 call1 (Vrun_hooks
, Qkill_buffer_hook
);
1066 unbind_to (count
, Qnil
);
1069 /* We have no more questions to ask. Verify that it is valid
1070 to kill the buffer. This must be done after the questions
1071 since anything can happen within do_yes_or_no_p. */
1073 /* Don't kill the minibuffer now current. */
1074 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1080 /* When we kill a base buffer, kill all its indirect buffers.
1081 We do it at this stage so nothing terrible happens if they
1082 ask questions or their hooks get errors. */
1083 if (! b
->base_buffer
)
1085 struct buffer
*other
;
1089 for (other
= all_buffers
; other
; other
= other
->next
)
1090 /* all_buffers contains dead buffers too;
1091 don't re-kill them. */
1092 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1095 XSETBUFFER (buf
, other
);
1102 /* Make this buffer not be current.
1103 In the process, notice if this is the sole visible buffer
1104 and give up if so. */
1105 if (b
== current_buffer
)
1107 tem
= Fother_buffer (buf
, Qnil
);
1109 if (b
== current_buffer
)
1113 /* Now there is no question: we can kill the buffer. */
1115 #ifdef CLASH_DETECTION
1116 /* Unlock this buffer's file, if it is locked. */
1118 #endif /* CLASH_DETECTION */
1120 kill_buffer_processes (buf
);
1122 tem
= Vinhibit_quit
;
1124 replace_buffer_in_all_windows (buf
);
1125 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1126 frames_discard_buffer (buf
);
1127 Vinhibit_quit
= tem
;
1129 /* Delete any auto-save file, if we saved it in this session. */
1130 if (STRINGP (b
->auto_save_file_name
)
1131 && b
->auto_save_modified
!= 0
1132 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
)
1135 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1137 internal_delete_file (b
->auto_save_file_name
);
1142 /* Unchain all markers that belong to this indirect buffer.
1143 Don't unchain the markers that belong to the base buffer
1144 or its other indirect buffers. */
1145 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1151 unchain_marker (tem
);
1157 /* Unchain all markers of this buffer and its indirect buffers.
1158 and leave them pointing nowhere. */
1159 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1166 BUF_MARKERS (b
) = Qnil
;
1168 #ifdef USE_TEXT_PROPERTIES
1169 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1172 /* Perhaps we should explicitly free the interval tree here... */
1175 /* Reset the local variables, so that this buffer's local values
1176 won't be protected from GC. They would be protected
1177 if they happened to remain encached in their symbols.
1178 This gets rid of them for certain. */
1179 swap_out_buffer_local_variables (b
);
1180 reset_buffer_local_variables (b
, 1);
1185 if (! b
->base_buffer
)
1186 BUFFER_FREE (BUF_BEG_ADDR (b
));
1188 if (b
->newline_cache
)
1190 free_region_cache (b
->newline_cache
);
1191 b
->newline_cache
= 0;
1193 if (b
->width_run_cache
)
1195 free_region_cache (b
->width_run_cache
);
1196 b
->width_run_cache
= 0;
1198 b
->width_table
= Qnil
;
1200 b
->undo_list
= Qnil
;
1205 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1206 we do this each time BUF is selected visibly, the more recently
1207 selected buffers are always closer to the front of the list. This
1208 means that other_buffer is more likely to choose a relevant buffer. */
1214 register Lisp_Object link
, prev
;
1217 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
1219 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
1224 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1225 we cannot use Fdelq itself here because it allows quitting. */
1228 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
1230 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1232 XCONS (link
)->cdr
= Vbuffer_alist
;
1233 Vbuffer_alist
= link
;
1235 /* Now move this buffer to the front of frame_buffer_list also. */
1238 for (link
= frame_buffer_list (); CONSP (link
); link
= XCONS (link
)->cdr
)
1240 if (EQ (XCONS (link
)->car
, buf
))
1245 /* Effectively do delq. */
1250 set_frame_buffer_list (XCONS (frame_buffer_list ())->cdr
);
1252 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1254 XCONS (link
)->cdr
= frame_buffer_list ();
1255 set_frame_buffer_list (link
);
1258 set_frame_buffer_list (Fcons (buf
, frame_buffer_list ()));
1261 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1262 "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\
1263 Use this function before selecting the buffer, since it may need to inspect\n\
1264 the current buffer's major mode.")
1269 Lisp_Object function
;
1271 function
= buffer_defaults
.major_mode
;
1272 if (NILP (function
) && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1273 function
= current_buffer
->major_mode
;
1275 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1278 count
= specpdl_ptr
- specpdl
;
1280 /* To select a nonfundamental mode,
1281 select the buffer temporarily and then call the mode function. */
1283 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1285 Fset_buffer (buffer
);
1288 return unbind_to (count
, Qnil
);
1291 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1292 "Select buffer BUFFER in the current window.\n\
1293 BUFFER may be a buffer or a buffer name.\n\
1294 Optional second arg NORECORD non-nil means\n\
1295 do not put this buffer at the front of the list of recently selected ones.\n\
1297 WARNING: This is NOT the way to work on another buffer temporarily\n\
1298 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
1299 the window-buffer correspondences.")
1301 Lisp_Object buffer
, norecord
;
1303 register Lisp_Object buf
;
1306 if (EQ (minibuf_window
, selected_window
))
1307 error ("Cannot switch buffers in minibuffer window");
1308 tem
= Fwindow_dedicated_p (selected_window
);
1310 error ("Cannot switch buffers in a dedicated window");
1313 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
1316 buf
= Fget_buffer (buffer
);
1319 buf
= Fget_buffer_create (buffer
);
1320 Fset_buffer_major_mode (buf
);
1324 if (NILP (norecord
))
1325 record_buffer (buf
);
1327 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1328 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1335 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1336 "Select buffer BUFFER in some window, preferably a different one.\n\
1337 If BUFFER is nil, then some other buffer is chosen.\n\
1338 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
1339 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
1340 window even if BUFFER is already visible in the selected window.\n\
1341 This uses the function `display-buffer' as a subroutine; see the documentation\n\
1342 of `display-buffer' for additional customization information.\n\
1344 Optional third arg NORECORD non-nil means\n\
1345 do not put this buffer at the front of the list of recently selected ones.")
1346 (buffer
, other_window
, norecord
)
1347 Lisp_Object buffer
, other_window
, norecord
;
1349 register Lisp_Object buf
;
1351 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
1354 buf
= Fget_buffer (buffer
);
1357 buf
= Fget_buffer_create (buffer
);
1358 Fset_buffer_major_mode (buf
);
1362 if (NILP (norecord
))
1363 record_buffer (buf
);
1364 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1368 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1369 "Return the current buffer as a Lisp object.")
1372 register Lisp_Object buf
;
1373 XSETBUFFER (buf
, current_buffer
);
1377 /* Set the current buffer to B. */
1380 set_buffer_internal (b
)
1381 register struct buffer
*b
;
1383 register struct buffer
*old_buf
;
1384 register Lisp_Object tail
, valcontents
;
1387 if (current_buffer
== b
)
1390 windows_or_buffers_changed
= 1;
1391 set_buffer_internal_1 (b
);
1394 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1395 This is used by redisplay. */
1398 set_buffer_internal_1 (b
)
1399 register struct buffer
*b
;
1401 register struct buffer
*old_buf
;
1402 register Lisp_Object tail
, valcontents
;
1405 if (current_buffer
== b
)
1408 old_buf
= current_buffer
;
1410 last_known_column_point
= -1; /* invalidate indentation cache */
1414 /* Put the undo list back in the base buffer, so that it appears
1415 that an indirect buffer shares the undo list of its base. */
1416 if (old_buf
->base_buffer
)
1417 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1419 /* If the old current buffer has markers to record PT, BEGV and ZV
1420 when it is not current, update them now. */
1421 if (! NILP (old_buf
->pt_marker
))
1424 XSETBUFFER (obuf
, old_buf
);
1425 set_marker_both (old_buf
->pt_marker
, obuf
,
1426 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1428 if (! NILP (old_buf
->begv_marker
))
1431 XSETBUFFER (obuf
, old_buf
);
1432 set_marker_both (old_buf
->begv_marker
, obuf
,
1433 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1435 if (! NILP (old_buf
->zv_marker
))
1438 XSETBUFFER (obuf
, old_buf
);
1439 set_marker_both (old_buf
->zv_marker
, obuf
,
1440 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1444 /* Get the undo list from the base buffer, so that it appears
1445 that an indirect buffer shares the undo list of its base. */
1447 b
->undo_list
= b
->base_buffer
->undo_list
;
1449 /* If the new current buffer has markers to record PT, BEGV and ZV
1450 when it is not current, fetch them now. */
1451 if (! NILP (b
->pt_marker
))
1453 BUF_PT (b
) = marker_position (b
->pt_marker
);
1454 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1456 if (! NILP (b
->begv_marker
))
1458 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1459 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1461 if (! NILP (b
->zv_marker
))
1463 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1464 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1467 /* Look down buffer's list of local Lisp variables
1468 to find and update any that forward into C variables. */
1470 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1472 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1473 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1474 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1475 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->car
,
1476 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1477 /* Just reference the variable
1478 to cause it to become set for this buffer. */
1479 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1482 /* Do the same with any others that were local to the previous buffer */
1485 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1487 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1488 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1489 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1490 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->car
,
1491 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1492 /* Just reference the variable
1493 to cause it to become set for this buffer. */
1494 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1498 /* Switch to buffer B temporarily for redisplay purposes.
1499 This avoids certain things that don't need to be done within redisplay. */
1505 register struct buffer
*old_buf
;
1507 if (current_buffer
== b
)
1510 old_buf
= current_buffer
;
1515 /* If the old current buffer has markers to record PT, BEGV and ZV
1516 when it is not current, update them now. */
1517 if (! NILP (old_buf
->pt_marker
))
1520 XSETBUFFER (obuf
, old_buf
);
1521 set_marker_both (old_buf
->pt_marker
, obuf
,
1522 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1524 if (! NILP (old_buf
->begv_marker
))
1527 XSETBUFFER (obuf
, old_buf
);
1528 set_marker_both (old_buf
->begv_marker
, obuf
,
1529 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1531 if (! NILP (old_buf
->zv_marker
))
1534 XSETBUFFER (obuf
, old_buf
);
1535 set_marker_both (old_buf
->zv_marker
, obuf
,
1536 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1540 /* If the new current buffer has markers to record PT, BEGV and ZV
1541 when it is not current, fetch them now. */
1542 if (! NILP (b
->pt_marker
))
1544 BUF_PT (b
) = marker_position (b
->pt_marker
);
1545 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1547 if (! NILP (b
->begv_marker
))
1549 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1550 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1552 if (! NILP (b
->zv_marker
))
1554 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1555 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1559 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1560 "Make the buffer BUFFER current for editing operations.\n\
1561 BUFFER may be a buffer or the name of an existing buffer.\n\
1562 See also `save-excursion' when you want to make a buffer current temporarily.\n\
1563 This function does not display the buffer, so its effect ends\n\
1564 when the current command terminates.\n\
1565 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
1567 register Lisp_Object buffer
;
1569 register Lisp_Object buf
;
1570 buf
= Fget_buffer (buffer
);
1573 if (NILP (XBUFFER (buf
)->name
))
1574 error ("Selecting deleted buffer");
1575 set_buffer_internal (XBUFFER (buf
));
1579 /* Set the current buffer to BUFFER provided it is alive. */
1582 set_buffer_if_live (buffer
)
1585 if (! NILP (XBUFFER (buffer
)->name
))
1586 Fset_buffer (buffer
);
1590 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1591 Sbarf_if_buffer_read_only
, 0, 0, 0,
1592 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1595 if (!NILP (current_buffer
->read_only
)
1596 && NILP (Vinhibit_read_only
))
1597 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1601 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1602 "Put BUFFER at the end of the list of all buffers.\n\
1603 There it is the least likely candidate for `other-buffer' to return;\n\
1604 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1605 If BUFFER is nil or omitted, bury the current buffer.\n\
1606 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1607 selected window if it is displayed there.")
1609 register Lisp_Object buffer
;
1611 /* Figure out what buffer we're going to bury. */
1614 XSETBUFFER (buffer
, current_buffer
);
1616 /* If we're burying the current buffer, unshow it. */
1617 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
), Qnil
);
1623 buf1
= Fget_buffer (buffer
);
1629 /* Move buffer to the end of the buffer list. */
1631 register Lisp_Object aelt
, link
;
1633 aelt
= Frassq (buffer
, Vbuffer_alist
);
1634 link
= Fmemq (aelt
, Vbuffer_alist
);
1635 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1636 XCONS (link
)->cdr
= Qnil
;
1637 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1640 frames_bury_buffer (buffer
);
1645 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1646 "Delete the entire contents of the current buffer.\n\
1647 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1648 so the buffer is truly empty after this.")
1653 current_buffer
->last_window_start
= 1;
1654 /* Prevent warnings, or suspension of auto saving, that would happen
1655 if future size is less than past size. Use of erase-buffer
1656 implies that the future text is not really related to the past text. */
1657 XSETFASTINT (current_buffer
->save_length
, 0);
1662 validate_region (b
, e
)
1663 register Lisp_Object
*b
, *e
;
1665 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1666 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1668 if (XINT (*b
) > XINT (*e
))
1671 tem
= *b
; *b
= *e
; *e
= tem
;
1674 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1675 && XINT (*e
) <= ZV
))
1676 args_out_of_range (*b
, *e
);
1679 /* Advance BYTE_POS up to a character boundary
1680 and return the adjusted position. */
1683 advance_to_char_boundary (byte_pos
)
1688 if (byte_pos
== BEG
)
1689 /* Beginning of buffer is always a character boundary. */
1692 c
= FETCH_BYTE (byte_pos
);
1693 if (! CHAR_HEAD_P (c
))
1695 /* We should advance BYTE_POS only when C is a constituen of a
1696 multibyte sequence. */
1699 /* If C is a constituent of a multibyte sequence, BYTE_POS was
1700 surely advance to the correct character boundary. If C is
1701 not, BYTE_POS was unchanged. */
1707 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
1709 "Set the multibyte flag of the current buffer to FLAG.\n\
1710 If FLAG is t, this makes the buffer a multibyte buffer.\n\
1711 If FLAG is nil, this makes the buffer a single-byte buffer.\n\
1712 The buffer contents remain unchanged as a sequence of bytes\n\
1713 but the contents viewed as characters do change.")
1717 Lisp_Object tail
, markers
;
1719 /* It would be better to update the list,
1720 but this is good enough for now. */
1721 if (! EQ (current_buffer
->undo_list
, Qt
))
1722 current_buffer
->undo_list
= Qnil
;
1724 /* If the cached position is for this buffer, clear it out. */
1725 clear_charpos_cache (current_buffer
);
1729 /* Do this first, so it can use CHAR_TO_BYTE
1730 to calculate the old correspondences. */
1731 set_intervals_multibyte (0);
1733 current_buffer
->enable_multibyte_characters
= Qnil
;
1739 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
1741 tail
= BUF_MARKERS (current_buffer
);
1742 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1744 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
1745 tail
= XMARKER (tail
)->chain
;
1750 /* Be sure not to have a multibyte sequence striding over the GAP.
1751 Ex: We change this: "...abc\201\241\241 _GAP_ \241\241\241..."
1752 to: "...abc _GAP_ \201\241\241\241\241\241..." */
1754 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
1755 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
1757 unsigned char *p
= GPT_ADDR
- 1;
1759 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
1760 if (BASE_LEADING_CODE_P (*p
))
1762 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
1764 move_gap_both (new_gpt
, new_gpt
);
1768 /* Do this first, so that chars_in_text asks the right question.
1769 set_intervals_multibyte needs it too. */
1770 current_buffer
->enable_multibyte_characters
= Qt
;
1772 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
1773 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
1775 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
1777 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
1778 if (BEGV_BYTE
> GPT_BYTE
)
1779 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
1781 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
1783 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
1784 if (ZV_BYTE
> GPT_BYTE
)
1785 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
1787 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
1790 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
1793 if (pt_byte
> GPT_BYTE
)
1794 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
1796 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
1797 TEMP_SET_PT_BOTH (pt
, pt_byte
);
1800 tail
= markers
= BUF_MARKERS (current_buffer
);
1801 BUF_MARKERS (current_buffer
) = Qnil
;
1803 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1805 XMARKER (tail
)->bytepos
1806 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
1807 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
1809 tail
= XMARKER (tail
)->chain
;
1811 BUF_MARKERS (current_buffer
) = markers
;
1813 /* Do this last, so it can calculate the new correspondences
1814 between chars and bytes. */
1815 set_intervals_multibyte (1);
1821 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1823 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1824 Most local variable bindings are eliminated so that the default values\n\
1825 become effective once more. Also, the syntax table is set from\n\
1826 `standard-syntax-table', the local keymap is set to nil,\n\
1827 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1828 This function also forces redisplay of the mode line.\n\
1830 Every function to select a new major mode starts by\n\
1831 calling this function.\n\n\
1832 As a special exception, local variables whose names have\n\
1833 a non-nil `permanent-local' property are not eliminated by this function.\n\
1835 The first thing this function does is run\n\
1836 the normal hook `change-major-mode-hook'.")
1839 register Lisp_Object alist
, sym
, tem
;
1842 if (!NILP (Vrun_hooks
))
1843 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1844 oalist
= current_buffer
->local_var_alist
;
1846 /* Make sure none of the bindings in oalist
1847 remain swapped in, in their symbols. */
1849 swap_out_buffer_local_variables (current_buffer
);
1851 /* Actually eliminate all local bindings of this buffer. */
1853 reset_buffer_local_variables (current_buffer
, 0);
1855 /* Redisplay mode lines; we are changing major mode. */
1857 update_mode_lines
++;
1859 /* Any which are supposed to be permanent,
1860 make local again, with the same values they had. */
1862 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1864 sym
= XCONS (XCONS (alist
)->car
)->car
;
1865 tem
= Fget (sym
, Qpermanent_local
);
1868 Fmake_local_variable (sym
);
1869 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1873 /* Force mode-line redisplay. Useful here because all major mode
1874 commands call this function. */
1875 update_mode_lines
++;
1880 /* Make sure no local variables remain set up with buffer B
1881 for their current values. */
1884 swap_out_buffer_local_variables (b
)
1887 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
1889 XSETBUFFER (buffer
, b
);
1890 oalist
= b
->local_var_alist
;
1892 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1894 sym
= XCONS (XCONS (alist
)->car
)->car
;
1896 /* Need not do anything if some other buffer's binding is now encached. */
1897 tem
= XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->car
;
1898 if (XBUFFER (tem
) == current_buffer
)
1900 /* Symbol is set up for this buffer's old local value.
1901 Set it up for the current buffer with the default value. */
1903 tem
= XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1904 /* Store the symbol's current value into the alist entry
1905 it is currently set up for. This is so that, if the
1906 local is marked permanent, and we make it local again
1907 later in Fkill_all_local_variables, we don't lose the value. */
1908 XCONS (XCONS (tem
)->car
)->cdr
1909 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->car
);
1910 /* Switch to the symbol's default-value alist entry. */
1911 XCONS (tem
)->car
= tem
;
1912 /* Mark it as current for buffer B. */
1913 XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->car
1915 /* Store the current value into any forwarding in the symbol. */
1916 store_symval_forwarding (sym
, XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->car
,
1922 /* Find all the overlays in the current buffer that contain position POS.
1923 Return the number found, and store them in a vector in *VEC_PTR.
1924 Store in *LEN_PTR the size allocated for the vector.
1925 Store in *NEXT_PTR the next position after POS where an overlay starts,
1926 or ZV if there are no more overlays.
1927 Store in *PREV_PTR the previous position before POS where an overlay ends,
1928 or BEGV if there are no previous overlays.
1929 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
1931 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1932 when this function is called.
1934 If EXTEND is non-zero, we make the vector bigger if necessary.
1935 If EXTEND is zero, we never extend the vector,
1936 and we store only as many overlays as will fit.
1937 But we still return the total number of overlays. */
1940 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
1943 Lisp_Object
**vec_ptr
;
1948 Lisp_Object tail
, overlay
, start
, end
, result
;
1951 Lisp_Object
*vec
= *vec_ptr
;
1954 int inhibit_storing
= 0;
1956 for (tail
= current_buffer
->overlays_before
;
1958 tail
= XCONS (tail
)->cdr
)
1960 int startpos
, endpos
;
1962 overlay
= XCONS (tail
)->car
;
1964 start
= OVERLAY_START (overlay
);
1965 end
= OVERLAY_END (overlay
);
1966 endpos
= OVERLAY_POSITION (end
);
1975 startpos
= OVERLAY_POSITION (start
);
1976 if (startpos
<= pos
)
1980 /* The supplied vector is full.
1981 Either make it bigger, or don't store any more in it. */
1984 *len_ptr
= len
*= 2;
1985 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1989 inhibit_storing
= 1;
1992 if (!inhibit_storing
)
1994 /* Keep counting overlays even if we can't return them all. */
1997 else if (startpos
< next
)
2001 for (tail
= current_buffer
->overlays_after
;
2003 tail
= XCONS (tail
)->cdr
)
2005 int startpos
, endpos
;
2007 overlay
= XCONS (tail
)->car
;
2009 start
= OVERLAY_START (overlay
);
2010 end
= OVERLAY_END (overlay
);
2011 startpos
= OVERLAY_POSITION (start
);
2014 if (startpos
< next
)
2018 endpos
= OVERLAY_POSITION (end
);
2025 *len_ptr
= len
*= 2;
2026 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2030 inhibit_storing
= 1;
2033 if (!inhibit_storing
)
2037 else if (endpos
< pos
&& endpos
> prev
)
2048 /* Find all the overlays in the current buffer that overlap the range BEG-END
2049 or are empty at BEG.
2051 Return the number found, and store them in a vector in *VEC_PTR.
2052 Store in *LEN_PTR the size allocated for the vector.
2053 Store in *NEXT_PTR the next position after POS where an overlay starts,
2054 or ZV if there are no more overlays.
2055 Store in *PREV_PTR the previous position before POS where an overlay ends,
2056 or BEGV if there are no previous overlays.
2057 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2059 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2060 when this function is called.
2062 If EXTEND is non-zero, we make the vector bigger if necessary.
2063 If EXTEND is zero, we never extend the vector,
2064 and we store only as many overlays as will fit.
2065 But we still return the total number of overlays. */
2068 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2071 Lisp_Object
**vec_ptr
;
2076 Lisp_Object tail
, overlay
, ostart
, oend
, result
;
2079 Lisp_Object
*vec
= *vec_ptr
;
2082 int inhibit_storing
= 0;
2084 for (tail
= current_buffer
->overlays_before
;
2086 tail
= XCONS (tail
)->cdr
)
2088 int startpos
, endpos
;
2090 overlay
= XCONS (tail
)->car
;
2092 ostart
= OVERLAY_START (overlay
);
2093 oend
= OVERLAY_END (overlay
);
2094 endpos
= OVERLAY_POSITION (oend
);
2101 startpos
= OVERLAY_POSITION (ostart
);
2102 /* Count an interval if it either overlaps the range
2103 or is empty at the start of the range. */
2104 if ((beg
< endpos
&& startpos
< end
)
2105 || (startpos
== endpos
&& beg
== endpos
))
2109 /* The supplied vector is full.
2110 Either make it bigger, or don't store any more in it. */
2113 *len_ptr
= len
*= 2;
2114 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2118 inhibit_storing
= 1;
2121 if (!inhibit_storing
)
2123 /* Keep counting overlays even if we can't return them all. */
2126 else if (startpos
< next
)
2130 for (tail
= current_buffer
->overlays_after
;
2132 tail
= XCONS (tail
)->cdr
)
2134 int startpos
, endpos
;
2136 overlay
= XCONS (tail
)->car
;
2138 ostart
= OVERLAY_START (overlay
);
2139 oend
= OVERLAY_END (overlay
);
2140 startpos
= OVERLAY_POSITION (ostart
);
2143 if (startpos
< next
)
2147 endpos
= OVERLAY_POSITION (oend
);
2148 /* Count an interval if it either overlaps the range
2149 or is empty at the start of the range. */
2150 if ((beg
< endpos
&& startpos
< end
)
2151 || (startpos
== endpos
&& beg
== endpos
))
2157 *len_ptr
= len
*= 2;
2158 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2162 inhibit_storing
= 1;
2165 if (!inhibit_storing
)
2169 else if (endpos
< beg
&& endpos
> prev
)
2180 /* Fast function to just test if we're at an overlay boundary. */
2182 overlay_touches_p (pos
)
2185 Lisp_Object tail
, overlay
;
2187 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2188 tail
= XCONS (tail
)->cdr
)
2192 overlay
= XCONS (tail
)->car
;
2193 if (!GC_OVERLAYP (overlay
))
2196 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2199 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2203 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2204 tail
= XCONS (tail
)->cdr
)
2208 overlay
= XCONS (tail
)->car
;
2209 if (!GC_OVERLAYP (overlay
))
2212 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2215 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2223 Lisp_Object overlay
;
2229 compare_overlays (s1
, s2
)
2230 struct sortvec
*s1
, *s2
;
2232 if (s1
->priority
!= s2
->priority
)
2233 return s1
->priority
- s2
->priority
;
2234 if (s1
->beg
!= s2
->beg
)
2235 return s1
->beg
- s2
->beg
;
2236 if (s1
->end
!= s2
->end
)
2237 return s2
->end
- s1
->end
;
2241 /* Sort an array of overlays by priority. The array is modified in place.
2242 The return value is the new size; this may be smaller than the original
2243 size if some of the overlays were invalid or were window-specific. */
2245 sort_overlays (overlay_vec
, noverlays
, w
)
2246 Lisp_Object
*overlay_vec
;
2251 struct sortvec
*sortvec
;
2252 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2254 /* Put the valid and relevant overlays into sortvec. */
2256 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2259 Lisp_Object overlay
;
2261 overlay
= overlay_vec
[i
];
2262 if (OVERLAY_VALID (overlay
)
2263 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2264 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2266 /* If we're interested in a specific window, then ignore
2267 overlays that are limited to some other window. */
2272 window
= Foverlay_get (overlay
, Qwindow
);
2273 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2277 /* This overlay is good and counts: put it into sortvec. */
2278 sortvec
[j
].overlay
= overlay
;
2279 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2280 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2281 tem
= Foverlay_get (overlay
, Qpriority
);
2283 sortvec
[j
].priority
= XINT (tem
);
2285 sortvec
[j
].priority
= 0;
2291 /* Sort the overlays into the proper order: increasing priority. */
2294 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2296 for (i
= 0; i
< noverlays
; i
++)
2297 overlay_vec
[i
] = sortvec
[i
].overlay
;
2303 Lisp_Object string
, string2
;
2310 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2311 int size
; /* Allocated length of that array. */
2312 int used
; /* How much of the array is currently in use. */
2313 int bytes
; /* Total length of the strings in buf. */
2316 /* Buffers for storing information about the overlays touching a given
2317 position. These could be automatic variables in overlay_strings, but
2318 it's more efficient to hold onto the memory instead of repeatedly
2319 allocating and freeing it. */
2320 static struct sortstrlist overlay_heads
, overlay_tails
;
2321 static unsigned char *overlay_str_buf
;
2323 /* Allocated length of overlay_str_buf. */
2324 static int overlay_str_len
;
2326 /* A comparison function suitable for passing to qsort. */
2328 cmp_for_strings (as1
, as2
)
2331 struct sortstr
*s1
= (struct sortstr
*)as1
;
2332 struct sortstr
*s2
= (struct sortstr
*)as2
;
2333 if (s1
->size
!= s2
->size
)
2334 return s2
->size
- s1
->size
;
2335 if (s1
->priority
!= s2
->priority
)
2336 return s1
->priority
- s2
->priority
;
2341 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2342 struct sortstrlist
*ssl
;
2343 Lisp_Object str
, str2
, pri
;
2348 if (ssl
->used
== ssl
->size
)
2354 ssl
->buf
= ((struct sortstr
*)
2355 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2357 ssl
->buf
[ssl
->used
].string
= str
;
2358 ssl
->buf
[ssl
->used
].string2
= str2
;
2359 ssl
->buf
[ssl
->used
].size
= size
;
2360 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2363 if (NILP (current_buffer
->enable_multibyte_characters
))
2364 nbytes
= XSTRING (str
)->size
;
2365 else if (! STRING_MULTIBYTE (str
))
2366 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2367 XSTRING (str
)->size_byte
);
2369 nbytes
= XSTRING (str
)->size_byte
;
2371 ssl
->bytes
+= nbytes
;
2375 if (NILP (current_buffer
->enable_multibyte_characters
))
2376 nbytes
= XSTRING (str2
)->size
;
2377 else if (! STRING_MULTIBYTE (str2
))
2378 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2379 XSTRING (str2
)->size_byte
);
2381 nbytes
= XSTRING (str2
)->size_byte
;
2383 ssl
->bytes
+= nbytes
;
2387 /* Return the concatenation of the strings associated with overlays that
2388 begin or end at POS, ignoring overlays that are specific to a window
2389 other than W. The strings are concatenated in the appropriate order:
2390 shorter overlays nest inside longer ones, and higher priority inside
2391 lower. Normally all of the after-strings come first, but zero-sized
2392 overlays have their after-strings ride along with the before-strings
2393 because it would look strange to print them inside-out.
2395 Returns the string length, and stores the contents indirectly through
2396 PSTR, if that variable is non-null. The string may be overwritten by
2397 subsequent calls. */
2400 overlay_strings (pos
, w
, pstr
)
2403 unsigned char **pstr
;
2405 Lisp_Object ov
, overlay
, window
, str
;
2406 int startpos
, endpos
;
2407 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2409 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2410 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2411 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2413 overlay
= XCONS (ov
)->car
;
2414 if (!OVERLAYP (overlay
))
2417 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2418 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2421 if (endpos
!= pos
&& startpos
!= pos
)
2423 window
= Foverlay_get (overlay
, Qwindow
);
2424 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2427 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2428 record_overlay_string (&overlay_heads
, str
,
2430 ? Foverlay_get (overlay
, Qafter_string
)
2432 Foverlay_get (overlay
, Qpriority
),
2434 else if (endpos
== pos
2435 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2436 record_overlay_string (&overlay_tails
, str
, Qnil
,
2437 Foverlay_get (overlay
, Qpriority
),
2440 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2442 overlay
= XCONS (ov
)->car
;
2443 if (!OVERLAYP (overlay
))
2446 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2447 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2450 if (endpos
!= pos
&& startpos
!= pos
)
2452 window
= Foverlay_get (overlay
, Qwindow
);
2453 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2456 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2457 record_overlay_string (&overlay_heads
, str
,
2459 ? Foverlay_get (overlay
, Qafter_string
)
2461 Foverlay_get (overlay
, Qpriority
),
2463 else if (endpos
== pos
2464 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2465 record_overlay_string (&overlay_tails
, str
, Qnil
,
2466 Foverlay_get (overlay
, Qpriority
),
2469 if (overlay_tails
.used
> 1)
2470 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2472 if (overlay_heads
.used
> 1)
2473 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2475 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2480 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2482 if (total
> overlay_str_len
)
2484 overlay_str_len
= total
;
2485 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2488 p
= overlay_str_buf
;
2489 for (i
= overlay_tails
.used
; --i
>= 0;)
2492 tem
= overlay_tails
.buf
[i
].string
;
2493 nbytes
= copy_text (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size_byte
,
2494 STRING_MULTIBYTE (tem
), multibyte
);
2497 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2500 tem
= overlay_heads
.buf
[i
].string
;
2501 nbytes
= copy_text (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size_byte
,
2502 STRING_MULTIBYTE (tem
), multibyte
);
2504 tem
= overlay_heads
.buf
[i
].string2
;
2507 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2508 XSTRING (tem
)->size_byte
,
2509 STRING_MULTIBYTE (tem
), multibyte
);
2513 if (p
!= overlay_str_buf
+ total
)
2516 *pstr
= overlay_str_buf
;
2522 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2525 recenter_overlay_lists (buf
, pos
)
2529 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2531 /* See if anything in overlays_before should move to overlays_after. */
2533 /* We don't strictly need prev in this loop; it should always be nil.
2534 But we use it for symmetry and in case that should cease to be true
2535 with some future change. */
2537 for (tail
= buf
->overlays_before
;
2539 prev
= tail
, tail
= next
)
2541 next
= XCONS (tail
)->cdr
;
2542 overlay
= XCONS (tail
)->car
;
2544 /* If the overlay is not valid, get rid of it. */
2545 if (!OVERLAY_VALID (overlay
))
2550 /* Splice the cons cell TAIL out of overlays_before. */
2552 XCONS (prev
)->cdr
= next
;
2554 buf
->overlays_before
= next
;
2560 beg
= OVERLAY_START (overlay
);
2561 end
= OVERLAY_END (overlay
);
2563 if (OVERLAY_POSITION (end
) > pos
)
2565 /* OVERLAY needs to be moved. */
2566 int where
= OVERLAY_POSITION (beg
);
2567 Lisp_Object other
, other_prev
;
2569 /* Splice the cons cell TAIL out of overlays_before. */
2571 XCONS (prev
)->cdr
= next
;
2573 buf
->overlays_before
= next
;
2575 /* Search thru overlays_after for where to put it. */
2577 for (other
= buf
->overlays_after
;
2579 other_prev
= other
, other
= XCONS (other
)->cdr
)
2581 Lisp_Object otherbeg
, otheroverlay
, follower
;
2584 otheroverlay
= XCONS (other
)->car
;
2585 if (! OVERLAY_VALID (otheroverlay
))
2588 otherbeg
= OVERLAY_START (otheroverlay
);
2589 if (OVERLAY_POSITION (otherbeg
) >= where
)
2593 /* Add TAIL to overlays_after before OTHER. */
2594 XCONS (tail
)->cdr
= other
;
2595 if (!NILP (other_prev
))
2596 XCONS (other_prev
)->cdr
= tail
;
2598 buf
->overlays_after
= tail
;
2602 /* We've reached the things that should stay in overlays_before.
2603 All the rest of overlays_before must end even earlier,
2608 /* See if anything in overlays_after should be in overlays_before. */
2610 for (tail
= buf
->overlays_after
;
2612 prev
= tail
, tail
= next
)
2614 next
= XCONS (tail
)->cdr
;
2615 overlay
= XCONS (tail
)->car
;
2617 /* If the overlay is not valid, get rid of it. */
2618 if (!OVERLAY_VALID (overlay
))
2623 /* Splice the cons cell TAIL out of overlays_after. */
2625 XCONS (prev
)->cdr
= next
;
2627 buf
->overlays_after
= next
;
2633 beg
= OVERLAY_START (overlay
);
2634 end
= OVERLAY_END (overlay
);
2636 /* Stop looking, when we know that nothing further
2637 can possibly end before POS. */
2638 if (OVERLAY_POSITION (beg
) > pos
)
2641 if (OVERLAY_POSITION (end
) <= pos
)
2643 /* OVERLAY needs to be moved. */
2644 int where
= OVERLAY_POSITION (end
);
2645 Lisp_Object other
, other_prev
;
2647 /* Splice the cons cell TAIL out of overlays_after. */
2649 XCONS (prev
)->cdr
= next
;
2651 buf
->overlays_after
= next
;
2653 /* Search thru overlays_before for where to put it. */
2655 for (other
= buf
->overlays_before
;
2657 other_prev
= other
, other
= XCONS (other
)->cdr
)
2659 Lisp_Object otherend
, otheroverlay
;
2662 otheroverlay
= XCONS (other
)->car
;
2663 if (! OVERLAY_VALID (otheroverlay
))
2666 otherend
= OVERLAY_END (otheroverlay
);
2667 if (OVERLAY_POSITION (otherend
) <= where
)
2671 /* Add TAIL to overlays_before before OTHER. */
2672 XCONS (tail
)->cdr
= other
;
2673 if (!NILP (other_prev
))
2674 XCONS (other_prev
)->cdr
= tail
;
2676 buf
->overlays_before
= tail
;
2681 XSETFASTINT (buf
->overlay_center
, pos
);
2685 adjust_overlays_for_insert (pos
, length
)
2689 /* After an insertion, the lists are still sorted properly,
2690 but we may need to update the value of the overlay center. */
2691 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
2692 XSETFASTINT (current_buffer
->overlay_center
,
2693 XFASTINT (current_buffer
->overlay_center
) + length
);
2697 adjust_overlays_for_delete (pos
, length
)
2701 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
2702 /* The deletion was to our right. No change needed; the before- and
2703 after-lists are still consistent. */
2705 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
2706 /* The deletion was to our left. We need to adjust the center value
2707 to account for the change in position, but the lists are consistent
2708 given the new value. */
2709 XSETFASTINT (current_buffer
->overlay_center
,
2710 XFASTINT (current_buffer
->overlay_center
) - length
);
2712 /* We're right in the middle. There might be things on the after-list
2713 that now belong on the before-list. Recentering will move them,
2714 and also update the center point. */
2715 recenter_overlay_lists (current_buffer
, pos
);
2718 /* Fix up overlays that were garbled as a result of permuting markers
2719 in the range START through END. Any overlay with at least one
2720 endpoint in this range will need to be unlinked from the overlay
2721 list and reinserted in its proper place.
2722 Such an overlay might even have negative size at this point.
2723 If so, we'll reverse the endpoints. Can you think of anything
2724 better to do in this situation? */
2726 fix_overlays_in_range (start
, end
)
2727 register int start
, end
;
2729 Lisp_Object tem
, overlay
;
2730 Lisp_Object before_list
, after_list
;
2731 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
2732 int startpos
, endpos
;
2734 /* This algorithm shifts links around instead of consing and GCing.
2735 The loop invariant is that before_list (resp. after_list) is a
2736 well-formed list except that its last element, the one that
2737 *pbefore (resp. *pafter) points to, is still uninitialized.
2738 So it's not a bug that before_list isn't initialized, although
2739 it may look strange. */
2740 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
2742 overlay
= XCONS (*ptail
)->car
;
2743 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2746 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2748 || (startpos
>= start
&& startpos
< end
))
2750 /* If the overlay is backwards, fix that now. */
2751 if (startpos
> endpos
)
2754 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2756 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2758 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2760 /* Add it to the end of the wrong list. Later on,
2761 recenter_overlay_lists will move it to the right place. */
2762 if (endpos
< XINT (current_buffer
->overlay_center
))
2765 pafter
= &XCONS (*ptail
)->cdr
;
2770 pbefore
= &XCONS (*ptail
)->cdr
;
2772 *ptail
= XCONS (*ptail
)->cdr
;
2775 ptail
= &XCONS (*ptail
)->cdr
;
2777 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
2779 overlay
= XCONS (*ptail
)->car
;
2780 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2781 if (startpos
>= end
)
2783 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2784 if (startpos
>= start
2785 || (endpos
>= start
&& endpos
< end
))
2787 if (startpos
> endpos
)
2790 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2792 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2794 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2796 if (endpos
< XINT (current_buffer
->overlay_center
))
2799 pafter
= &XCONS (*ptail
)->cdr
;
2804 pbefore
= &XCONS (*ptail
)->cdr
;
2806 *ptail
= XCONS (*ptail
)->cdr
;
2809 ptail
= &XCONS (*ptail
)->cdr
;
2812 /* Splice the constructed (wrong) lists into the buffer's lists,
2813 and let the recenter function make it sane again. */
2814 *pbefore
= current_buffer
->overlays_before
;
2815 current_buffer
->overlays_before
= before_list
;
2816 recenter_overlay_lists (current_buffer
,
2817 XINT (current_buffer
->overlay_center
));
2819 *pafter
= current_buffer
->overlays_after
;
2820 current_buffer
->overlays_after
= after_list
;
2821 recenter_overlay_lists (current_buffer
,
2822 XINT (current_buffer
->overlay_center
));
2825 /* We have two types of overlay: the one whose ending marker is
2826 after-insertion-marker (this is the usual case) and the one whose
2827 ending marker is before-insertion-marker. When `overlays_before'
2828 contains overlays of the latter type and the former type in this
2829 order and both overlays end at inserting position, inserting a text
2830 increases only the ending marker of the latter type, which results
2831 in incorrect ordering of `overlays_before'.
2833 This function fixes ordering of overlays in the slot
2834 `overlays_before' of the buffer *BP. Before the insertion, `point'
2835 was at PREV, and now is at POS. */
2838 fix_overlays_before (bp
, prev
, pos
)
2842 Lisp_Object
*tailp
= &bp
->overlays_before
;
2843 Lisp_Object
*right_place
;
2846 /* After the insertion, the several overlays may be in incorrect
2847 order. The possibility is that, in the list `overlays_before',
2848 an overlay which ends at POS appears after an overlay which ends
2849 at PREV. Since POS is greater than PREV, we must fix the
2850 ordering of these overlays, by moving overlays ends at POS before
2851 the overlays ends at PREV. */
2853 /* At first, find a place where disordered overlays should be linked
2854 in. It is where an overlay which end before POS exists. (i.e. an
2855 overlay whose ending marker is after-insertion-marker if disorder
2857 while (!NILP (*tailp
)
2858 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
)))
2860 tailp
= &XCONS (*tailp
)->cdr
;
2862 /* If we don't find such an overlay,
2863 or the found one ends before PREV,
2864 or the found one is the last one in the list,
2865 we don't have to fix anything. */
2868 || NILP (XCONS (*tailp
)->cdr
))
2871 right_place
= tailp
;
2872 tailp
= &XCONS (*tailp
)->cdr
;
2874 /* Now, end position of overlays in the list *TAILP should be before
2875 or equal to PREV. In the loop, an overlay which ends at POS is
2876 moved ahead to the place pointed by RIGHT_PLACE. If we found an
2877 overlay which ends before PREV, the remaining overlays are in
2879 while (!NILP (*tailp
))
2881 end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
));
2884 { /* This overlay is disordered. */
2885 Lisp_Object found
= *tailp
;
2887 /* Unlink the found overlay. */
2888 *tailp
= XCONS (found
)->cdr
;
2889 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
2890 XCONS (found
)->cdr
= *right_place
;
2891 /* Link it into the right place. */
2892 *right_place
= found
;
2894 else if (end
== prev
)
2895 tailp
= &XCONS (*tailp
)->cdr
;
2896 else /* No more disordered overlay. */
2901 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
2902 "Return t if OBJECT is an overlay.")
2906 return (OVERLAYP (object
) ? Qt
: Qnil
);
2909 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
2910 "Create a new overlay with range BEG to END in BUFFER.\n\
2911 If omitted, BUFFER defaults to the current buffer.\n\
2912 BEG and END may be integers or markers.\n\
2913 The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\
2914 front delimiter advance when text is inserted there.\n\
2915 The fifth arg REAR-ADVANCE, if non-nil, makes the\n\
2916 rear delimiter advance when text is inserted there.")
2917 (beg
, end
, buffer
, front_advance
, rear_advance
)
2918 Lisp_Object beg
, end
, buffer
;
2919 Lisp_Object front_advance
, rear_advance
;
2921 Lisp_Object overlay
;
2925 XSETBUFFER (buffer
, current_buffer
);
2927 CHECK_BUFFER (buffer
, 2);
2929 && ! EQ (Fmarker_buffer (beg
), buffer
))
2930 error ("Marker points into wrong buffer");
2932 && ! EQ (Fmarker_buffer (end
), buffer
))
2933 error ("Marker points into wrong buffer");
2935 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
2936 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2938 if (XINT (beg
) > XINT (end
))
2941 temp
= beg
; beg
= end
; end
= temp
;
2944 b
= XBUFFER (buffer
);
2946 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
2947 end
= Fset_marker (Fmake_marker (), end
, buffer
);
2949 if (!NILP (front_advance
))
2950 XMARKER (beg
)->insertion_type
= 1;
2951 if (!NILP (rear_advance
))
2952 XMARKER (end
)->insertion_type
= 1;
2954 overlay
= allocate_misc ();
2955 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
2956 XOVERLAY (overlay
)->start
= beg
;
2957 XOVERLAY (overlay
)->end
= end
;
2958 XOVERLAY (overlay
)->plist
= Qnil
;
2960 /* Put the new overlay on the wrong list. */
2961 end
= OVERLAY_END (overlay
);
2962 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
2963 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
2965 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
2967 /* This puts it in the right list, and in the right order. */
2968 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
2970 /* We don't need to redisplay the region covered by the overlay, because
2971 the overlay has no properties at the moment. */
2976 /* Mark a section of BUF as needing redisplay because of overlays changes. */
2979 modify_overlay (buf
, start
, end
)
2989 start
= end
; end
= temp
;
2992 /* If this is a buffer not in the selected window,
2993 we must do other windows. */
2994 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
2995 windows_or_buffers_changed
= 1;
2996 /* If it's not current, we can't use beg_unchanged, end_unchanged for it. */
2997 else if (buf
!= current_buffer
)
2998 windows_or_buffers_changed
= 1;
2999 /* If multiple windows show this buffer, we must do other windows. */
3000 else if (buffer_shared
> 1)
3001 windows_or_buffers_changed
= 1;
3004 if (unchanged_modified
== MODIFF
3005 && overlay_unchanged_modified
== OVERLAY_MODIFF
)
3007 beg_unchanged
= start
- BEG
;
3008 end_unchanged
= Z
- end
;
3012 if (Z
- end
< end_unchanged
)
3013 end_unchanged
= Z
- end
;
3014 if (start
- BEG
< beg_unchanged
)
3015 beg_unchanged
= start
- BEG
;
3019 ++BUF_OVERLAY_MODIFF (buf
);
3023 Lisp_Object
Fdelete_overlay ();
3025 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3026 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
3027 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
3028 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
3030 (overlay
, beg
, end
, buffer
)
3031 Lisp_Object overlay
, beg
, end
, buffer
;
3033 struct buffer
*b
, *ob
;
3034 Lisp_Object obuffer
;
3035 int count
= specpdl_ptr
- specpdl
;
3037 CHECK_OVERLAY (overlay
, 0);
3039 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3041 XSETBUFFER (buffer
, current_buffer
);
3042 CHECK_BUFFER (buffer
, 3);
3045 && ! EQ (Fmarker_buffer (beg
), buffer
))
3046 error ("Marker points into wrong buffer");
3048 && ! EQ (Fmarker_buffer (end
), buffer
))
3049 error ("Marker points into wrong buffer");
3051 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3052 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3054 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3055 return Fdelete_overlay (overlay
);
3057 if (XINT (beg
) > XINT (end
))
3060 temp
= beg
; beg
= end
; end
= temp
;
3063 specbind (Qinhibit_quit
, Qt
);
3065 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3066 b
= XBUFFER (buffer
);
3067 ob
= XBUFFER (obuffer
);
3069 /* If the overlay has changed buffers, do a thorough redisplay. */
3070 if (!EQ (buffer
, obuffer
))
3072 /* Redisplay where the overlay was. */
3073 if (!NILP (obuffer
))
3078 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3079 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3081 modify_overlay (ob
, o_beg
, o_end
);
3084 /* Redisplay where the overlay is going to be. */
3085 modify_overlay (b
, XINT (beg
), XINT (end
));
3088 /* Redisplay the area the overlay has just left, or just enclosed. */
3091 int change_beg
, change_end
;
3093 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3094 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3096 if (o_beg
== XINT (beg
))
3097 modify_overlay (b
, o_end
, XINT (end
));
3098 else if (o_end
== XINT (end
))
3099 modify_overlay (b
, o_beg
, XINT (beg
));
3102 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3103 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3104 modify_overlay (b
, o_beg
, o_end
);
3108 if (!NILP (obuffer
))
3110 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3111 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3114 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3115 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3117 /* Put the overlay on the wrong list. */
3118 end
= OVERLAY_END (overlay
);
3119 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3120 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3122 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3124 /* This puts it in the right list, and in the right order. */
3125 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3127 return unbind_to (count
, overlay
);
3130 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3131 "Delete the overlay OVERLAY from its buffer.")
3133 Lisp_Object overlay
;
3137 int count
= specpdl_ptr
- specpdl
;
3139 CHECK_OVERLAY (overlay
, 0);
3141 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3145 b
= XBUFFER (buffer
);
3147 specbind (Qinhibit_quit
, Qt
);
3149 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3150 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3153 marker_position (OVERLAY_START (overlay
)),
3154 marker_position (OVERLAY_END (overlay
)));
3156 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3157 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3159 return unbind_to (count
, Qnil
);
3162 /* Overlay dissection functions. */
3164 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3165 "Return the position at which OVERLAY starts.")
3167 Lisp_Object overlay
;
3169 CHECK_OVERLAY (overlay
, 0);
3171 return (Fmarker_position (OVERLAY_START (overlay
)));
3174 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3175 "Return the position at which OVERLAY ends.")
3177 Lisp_Object overlay
;
3179 CHECK_OVERLAY (overlay
, 0);
3181 return (Fmarker_position (OVERLAY_END (overlay
)));
3184 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3185 "Return the buffer OVERLAY belongs to.")
3187 Lisp_Object overlay
;
3189 CHECK_OVERLAY (overlay
, 0);
3191 return Fmarker_buffer (OVERLAY_START (overlay
));
3194 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3195 "Return a list of the properties on OVERLAY.\n\
3196 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
3199 Lisp_Object overlay
;
3201 CHECK_OVERLAY (overlay
, 0);
3203 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3207 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3208 "Return a list of the overlays that contain position POS.")
3213 Lisp_Object
*overlay_vec
;
3217 CHECK_NUMBER_COERCE_MARKER (pos
, 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_at (XINT (pos
), 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 ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3235 "Return a list of the overlays that overlap the region BEG ... END.\n\
3236 Overlap means that at least one character is contained within the overlay\n\
3237 and also contained within the specified region.\n\
3238 Empty overlays are included in the result if they are located at BEG\n\
3239 or between BEG and END.")
3241 Lisp_Object beg
, end
;
3244 Lisp_Object
*overlay_vec
;
3248 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
3249 CHECK_NUMBER_COERCE_MARKER (end
, 0);
3252 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3254 /* Put all the overlays we want in a vector in overlay_vec.
3255 Store the length in len. */
3256 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3257 (int *) 0, (int *) 0);
3259 /* Make a list of them all. */
3260 result
= Flist (noverlays
, overlay_vec
);
3262 xfree (overlay_vec
);
3266 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3268 "Return the next position after POS where an overlay starts or ends.\n\
3269 If there are no more overlay boundaries after POS, return (point-max).")
3275 Lisp_Object
*overlay_vec
;
3279 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3282 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3284 /* Put all the overlays we want in a vector in overlay_vec.
3285 Store the length in len.
3286 endpos gets the position where the next overlay starts. */
3287 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3288 &endpos
, (int *) 0);
3290 /* If any of these overlays ends before endpos,
3291 use its ending point instead. */
3292 for (i
= 0; i
< noverlays
; i
++)
3297 oend
= OVERLAY_END (overlay_vec
[i
]);
3298 oendpos
= OVERLAY_POSITION (oend
);
3299 if (oendpos
< endpos
)
3303 xfree (overlay_vec
);
3304 return make_number (endpos
);
3307 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3308 Sprevious_overlay_change
, 1, 1, 0,
3309 "Return the previous position before POS where an overlay starts or ends.\n\
3310 If there are no more overlay boundaries before POS, return (point-min).")
3316 Lisp_Object
*overlay_vec
;
3321 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3324 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3326 /* At beginning of buffer, we know the answer;
3327 avoid bug subtracting 1 below. */
3328 if (XINT (pos
) == BEGV
)
3331 /* Put all the overlays we want in a vector in overlay_vec.
3332 Store the length in len.
3333 prevpos gets the position of an overlay end. */
3334 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3335 (int *) 0, &prevpos
);
3337 /* If any of these overlays starts after prevpos,
3338 maybe use its starting point instead. */
3339 for (i
= 0; i
< noverlays
; i
++)
3344 ostart
= OVERLAY_START (overlay_vec
[i
]);
3345 ostartpos
= OVERLAY_POSITION (ostart
);
3346 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
3347 prevpos
= ostartpos
;
3350 /* If any overlay ends at pos, consider its starting point too. */
3351 for (tail
= current_buffer
->overlays_before
;
3353 tail
= XCONS (tail
)->cdr
)
3355 Lisp_Object overlay
, ostart
;
3358 overlay
= XCONS (tail
)->car
;
3360 ostart
= OVERLAY_START (overlay
);
3361 ostartpos
= OVERLAY_POSITION (ostart
);
3362 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
3363 prevpos
= ostartpos
;
3366 xfree (overlay_vec
);
3367 return make_number (prevpos
);
3370 /* These functions are for debugging overlays. */
3372 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3373 "Return a pair of lists giving all the overlays of the current buffer.\n\
3374 The car has all the overlays before the overlay center;\n\
3375 the cdr has all the overlays after the overlay center.\n\
3376 Recentering overlays moves overlays between these lists.\n\
3377 The lists you get are copies, so that changing them has no effect.\n\
3378 However, the overlays you get are the real objects that the buffer uses.")
3381 Lisp_Object before
, after
;
3382 before
= current_buffer
->overlays_before
;
3384 before
= Fcopy_sequence (before
);
3385 after
= current_buffer
->overlays_after
;
3387 after
= Fcopy_sequence (after
);
3389 return Fcons (before
, after
);
3392 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3393 "Recenter the overlays of the current buffer around position POS.")
3397 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3399 recenter_overlay_lists (current_buffer
, XINT (pos
));
3403 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3404 "Get the property of overlay OVERLAY with property name PROP.")
3406 Lisp_Object overlay
, prop
;
3408 Lisp_Object plist
, fallback
;
3410 CHECK_OVERLAY (overlay
, 0);
3414 for (plist
= XOVERLAY (overlay
)->plist
;
3415 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
3416 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
3418 if (EQ (XCONS (plist
)->car
, prop
))
3419 return XCONS (XCONS (plist
)->cdr
)->car
;
3420 else if (EQ (XCONS (plist
)->car
, Qcategory
))
3423 tem
= Fcar (Fcdr (plist
));
3425 fallback
= Fget (tem
, prop
);
3432 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3433 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
3434 (overlay
, prop
, value
)
3435 Lisp_Object overlay
, prop
, value
;
3437 Lisp_Object tail
, buffer
;
3440 CHECK_OVERLAY (overlay
, 0);
3442 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3444 for (tail
= XOVERLAY (overlay
)->plist
;
3445 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
3446 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
3447 if (EQ (XCONS (tail
)->car
, prop
))
3449 changed
= !EQ (XCONS (XCONS (tail
)->cdr
)->car
, value
);
3450 XCONS (XCONS (tail
)->cdr
)->car
= value
;
3453 /* It wasn't in the list, so add it to the front. */
3454 changed
= !NILP (value
);
3455 XOVERLAY (overlay
)->plist
3456 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3458 if (! NILP (buffer
))
3461 modify_overlay (XBUFFER (buffer
),
3462 marker_position (OVERLAY_START (overlay
)),
3463 marker_position (OVERLAY_END (overlay
)));
3464 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3465 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3466 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3467 Fdelete_overlay (overlay
);
3472 /* Subroutine of report_overlay_modification. */
3474 /* Lisp vector holding overlay hook functions to call.
3475 Vector elements come in pairs.
3476 Each even-index element is a list of hook functions.
3477 The following odd-index element is the overlay they came from.
3479 Before the buffer change, we fill in this vector
3480 as we call overlay hook functions.
3481 After the buffer change, we get the functions to call from this vector.
3482 This way we always call the same functions before and after the change. */
3483 static Lisp_Object last_overlay_modification_hooks
;
3485 /* Number of elements actually used in last_overlay_modification_hooks. */
3486 static int last_overlay_modification_hooks_used
;
3488 /* Add one functionlist/overlay pair
3489 to the end of last_overlay_modification_hooks. */
3492 add_overlay_mod_hooklist (functionlist
, overlay
)
3493 Lisp_Object functionlist
, overlay
;
3495 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3497 if (last_overlay_modification_hooks_used
== oldsize
)
3500 old
= last_overlay_modification_hooks
;
3501 last_overlay_modification_hooks
3502 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3503 bcopy (XVECTOR (old
)->contents
,
3504 XVECTOR (last_overlay_modification_hooks
)->contents
,
3505 sizeof (Lisp_Object
) * oldsize
);
3507 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3508 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3511 /* Run the modification-hooks of overlays that include
3512 any part of the text in START to END.
3513 If this change is an insertion, also
3514 run the insert-before-hooks of overlay starting at END,
3515 and the insert-after-hooks of overlay ending at START.
3517 This is called both before and after the modification.
3518 AFTER is nonzero when we call after the modification.
3520 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3521 When AFTER is nonzero, they are the start position,
3522 the position after the inserted new text,
3523 and the length of deleted or replaced old text. */
3526 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3527 Lisp_Object start
, end
;
3529 Lisp_Object arg1
, arg2
, arg3
;
3531 Lisp_Object prop
, overlay
, tail
;
3532 /* 1 if this change is an insertion. */
3533 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3535 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3539 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3543 /* Call the functions recorded in last_overlay_modification_hooks
3544 rather than scanning the overlays again.
3545 First copy the vector contents, in case some of these hooks
3546 do subsequent modification of the buffer. */
3547 int size
= last_overlay_modification_hooks_used
;
3548 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3551 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3552 copy
, size
* sizeof (Lisp_Object
));
3554 gcpro1
.nvars
= size
;
3556 for (i
= 0; i
< size
;)
3558 Lisp_Object prop
, overlay
;
3560 overlay
= copy
[i
++];
3561 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3567 /* We are being called before a change.
3568 Scan the overlays to find the functions to call. */
3569 last_overlay_modification_hooks_used
= 0;
3571 for (tail
= current_buffer
->overlays_before
;
3573 tail
= XCONS (tail
)->cdr
)
3575 int startpos
, endpos
;
3576 Lisp_Object ostart
, oend
;
3578 overlay
= XCONS (tail
)->car
;
3580 ostart
= OVERLAY_START (overlay
);
3581 oend
= OVERLAY_END (overlay
);
3582 endpos
= OVERLAY_POSITION (oend
);
3583 if (XFASTINT (start
) > endpos
)
3585 startpos
= OVERLAY_POSITION (ostart
);
3586 if (insertion
&& (XFASTINT (start
) == startpos
3587 || XFASTINT (end
) == startpos
))
3589 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3592 /* Copy TAIL in case the hook recenters the overlay lists. */
3594 tail
= Fcopy_sequence (tail
);
3596 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3599 if (insertion
&& (XFASTINT (start
) == endpos
3600 || XFASTINT (end
) == endpos
))
3602 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3606 tail
= Fcopy_sequence (tail
);
3608 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3611 /* Test for intersecting intervals. This does the right thing
3612 for both insertion and deletion. */
3613 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3615 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3619 tail
= Fcopy_sequence (tail
);
3621 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3627 for (tail
= current_buffer
->overlays_after
;
3629 tail
= XCONS (tail
)->cdr
)
3631 int startpos
, endpos
;
3632 Lisp_Object ostart
, oend
;
3634 overlay
= XCONS (tail
)->car
;
3636 ostart
= OVERLAY_START (overlay
);
3637 oend
= OVERLAY_END (overlay
);
3638 startpos
= OVERLAY_POSITION (ostart
);
3639 endpos
= OVERLAY_POSITION (oend
);
3640 if (XFASTINT (end
) < startpos
)
3642 if (insertion
&& (XFASTINT (start
) == startpos
3643 || XFASTINT (end
) == startpos
))
3645 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3649 tail
= Fcopy_sequence (tail
);
3651 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3654 if (insertion
&& (XFASTINT (start
) == endpos
3655 || XFASTINT (end
) == endpos
))
3657 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3661 tail
= Fcopy_sequence (tail
);
3663 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3666 /* Test for intersecting intervals. This does the right thing
3667 for both insertion and deletion. */
3668 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3670 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3674 tail
= Fcopy_sequence (tail
);
3676 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3685 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
3686 Lisp_Object list
, overlay
;
3688 Lisp_Object arg1
, arg2
, arg3
;
3690 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3692 GCPRO4 (list
, arg1
, arg2
, arg3
);
3694 add_overlay_mod_hooklist (list
, overlay
);
3696 while (!NILP (list
))
3699 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
3701 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
3707 /* Delete any zero-sized overlays at position POS, if the `evaporate'
3710 evaporate_overlays (pos
)
3713 Lisp_Object tail
, overlay
, hit_list
;
3716 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
3717 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
3718 tail
= XCONS (tail
)->cdr
)
3721 overlay
= XCONS (tail
)->car
;
3722 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3725 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
3726 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3727 hit_list
= Fcons (overlay
, hit_list
);
3730 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
3731 tail
= XCONS (tail
)->cdr
)
3734 overlay
= XCONS (tail
)->car
;
3735 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3738 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
3739 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3740 hit_list
= Fcons (overlay
, hit_list
);
3742 for (; CONSP (hit_list
); hit_list
= XCONS (hit_list
)->cdr
)
3743 Fdelete_overlay (XCONS (hit_list
)->car
);
3746 /* Somebody has tried to store a value with an unacceptable type
3747 in the slot with offset OFFSET. */
3750 buffer_slot_type_mismatch (offset
)
3755 sym
= *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
);
3756 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
3758 case Lisp_Int
: type_name
= "integers"; break;
3759 case Lisp_String
: type_name
= "strings"; break;
3760 case Lisp_Symbol
: type_name
= "symbols"; break;
3766 error ("Only %s should be stored in the buffer-local variable %s",
3767 type_name
, XSYMBOL (sym
)->name
->data
);
3772 register Lisp_Object tem
;
3774 buffer_permanent_local_flags
= 0;
3776 /* Make sure all markable slots in buffer_defaults
3777 are initialized reasonably, so mark_buffer won't choke. */
3778 reset_buffer (&buffer_defaults
);
3779 reset_buffer_local_variables (&buffer_defaults
, 1);
3780 reset_buffer (&buffer_local_symbols
);
3781 reset_buffer_local_variables (&buffer_local_symbols
, 1);
3782 /* Prevent GC from getting confused. */
3783 buffer_defaults
.text
= &buffer_defaults
.own_text
;
3784 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
3785 #ifdef USE_TEXT_PROPERTIES
3786 BUF_INTERVALS (&buffer_defaults
) = 0;
3787 BUF_INTERVALS (&buffer_local_symbols
) = 0;
3789 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
3790 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
3792 /* Set up the default values of various buffer slots. */
3793 /* Must do these before making the first buffer! */
3795 /* real setup is done in loaddefs.el */
3796 buffer_defaults
.mode_line_format
= build_string ("%-");
3797 buffer_defaults
.abbrev_mode
= Qnil
;
3798 buffer_defaults
.overwrite_mode
= Qnil
;
3799 buffer_defaults
.case_fold_search
= Qt
;
3800 buffer_defaults
.auto_fill_function
= Qnil
;
3801 buffer_defaults
.selective_display
= Qnil
;
3803 buffer_defaults
.selective_display_ellipses
= Qt
;
3805 buffer_defaults
.abbrev_table
= Qnil
;
3806 buffer_defaults
.display_table
= Qnil
;
3807 buffer_defaults
.undo_list
= Qnil
;
3808 buffer_defaults
.mark_active
= Qnil
;
3809 buffer_defaults
.file_format
= Qnil
;
3810 buffer_defaults
.overlays_before
= Qnil
;
3811 buffer_defaults
.overlays_after
= Qnil
;
3812 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
3814 XSETFASTINT (buffer_defaults
.tab_width
, 8);
3815 buffer_defaults
.truncate_lines
= Qnil
;
3816 buffer_defaults
.ctl_arrow
= Qt
;
3817 buffer_defaults
.direction_reversed
= Qnil
;
3820 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
3822 buffer_defaults
.enable_multibyte_characters
= Qt
;
3823 buffer_defaults
.buffer_file_coding_system
= Qnil
;
3824 XSETFASTINT (buffer_defaults
.fill_column
, 70);
3825 XSETFASTINT (buffer_defaults
.left_margin
, 0);
3826 buffer_defaults
.cache_long_line_scans
= Qnil
;
3827 buffer_defaults
.file_truename
= Qnil
;
3828 XSETFASTINT (buffer_defaults
.display_count
, 0);
3830 /* Assign the local-flags to the slots that have default values.
3831 The local flag is a bit that is used in the buffer
3832 to say that it has its own local value for the slot.
3833 The local flag bits are in the local_var_flags slot of the buffer. */
3835 /* Nothing can work if this isn't true */
3836 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
3838 /* 0 means not a lisp var, -1 means always local, else mask */
3839 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
3840 XSETINT (buffer_local_flags
.filename
, -1);
3841 XSETINT (buffer_local_flags
.directory
, -1);
3842 XSETINT (buffer_local_flags
.backed_up
, -1);
3843 XSETINT (buffer_local_flags
.save_length
, -1);
3844 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
3845 XSETINT (buffer_local_flags
.read_only
, -1);
3846 XSETINT (buffer_local_flags
.major_mode
, -1);
3847 XSETINT (buffer_local_flags
.mode_name
, -1);
3848 XSETINT (buffer_local_flags
.undo_list
, -1);
3849 XSETINT (buffer_local_flags
.mark_active
, -1);
3850 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
3851 XSETINT (buffer_local_flags
.file_truename
, -1);
3852 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
3853 XSETINT (buffer_local_flags
.file_format
, -1);
3854 XSETINT (buffer_local_flags
.display_count
, -1);
3855 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
3857 XSETFASTINT (buffer_local_flags
.mode_line_format
, 1);
3858 XSETFASTINT (buffer_local_flags
.abbrev_mode
, 2);
3859 XSETFASTINT (buffer_local_flags
.overwrite_mode
, 4);
3860 XSETFASTINT (buffer_local_flags
.case_fold_search
, 8);
3861 XSETFASTINT (buffer_local_flags
.auto_fill_function
, 0x10);
3862 XSETFASTINT (buffer_local_flags
.selective_display
, 0x20);
3864 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, 0x40);
3866 XSETFASTINT (buffer_local_flags
.tab_width
, 0x80);
3867 XSETFASTINT (buffer_local_flags
.truncate_lines
, 0x100);
3868 XSETFASTINT (buffer_local_flags
.ctl_arrow
, 0x200);
3869 XSETFASTINT (buffer_local_flags
.fill_column
, 0x400);
3870 XSETFASTINT (buffer_local_flags
.left_margin
, 0x800);
3871 XSETFASTINT (buffer_local_flags
.abbrev_table
, 0x1000);
3872 XSETFASTINT (buffer_local_flags
.display_table
, 0x2000);
3874 XSETFASTINT (buffer_local_flags
.buffer_file_type
, 0x4000);
3875 /* Make this one a permanent local. */
3876 buffer_permanent_local_flags
|= 0x4000;
3878 XSETFASTINT (buffer_local_flags
.syntax_table
, 0x8000);
3879 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, 0x10000);
3880 XSETFASTINT (buffer_local_flags
.category_table
, 0x20000);
3881 XSETFASTINT (buffer_local_flags
.direction_reversed
, 0x40000);
3882 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, 0x80000);
3883 /* Make this one a permanent local. */
3884 buffer_permanent_local_flags
|= 0x80000;
3886 Vbuffer_alist
= Qnil
;
3890 QSFundamental
= build_string ("Fundamental");
3892 Qfundamental_mode
= intern ("fundamental-mode");
3893 buffer_defaults
.major_mode
= Qfundamental_mode
;
3895 Qmode_class
= intern ("mode-class");
3897 Qprotected_field
= intern ("protected-field");
3899 Qpermanent_local
= intern ("permanent-local");
3901 Qkill_buffer_hook
= intern ("kill-buffer-hook");
3903 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
3905 /* super-magic invisible buffer */
3906 Vbuffer_alist
= Qnil
;
3908 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3913 char buf
[MAXPATHLEN
+1];
3915 struct stat dotstat
, pwdstat
;
3919 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3921 /* If PWD is accurate, use it instead of calling getwd. This is faster
3922 when PWD is right, and may avoid a fatal error. */
3923 if ((pwd
= getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd
)
3924 && stat (pwd
, &pwdstat
) == 0
3925 && stat (".", &dotstat
) == 0
3926 && dotstat
.st_ino
== pwdstat
.st_ino
3927 && dotstat
.st_dev
== pwdstat
.st_dev
3928 && strlen (pwd
) < MAXPATHLEN
)
3931 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
3932 fatal ("`getcwd' failed: %s\n", strerror (errno
));
3934 else if (getwd (buf
) == 0)
3935 fatal ("`getwd' failed: %s\n", buf
);
3939 /* Maybe this should really use some standard subroutine
3940 whose definition is filename syntax dependent. */
3942 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
3944 buf
[rc
] = DIRECTORY_SEP
;
3947 #endif /* not VMS */
3949 current_buffer
->directory
= build_string (buf
);
3951 /* Add /: to the front of the name
3952 if it would otherwise be treated as magic. */
3953 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
3955 /* If the default dir is just /, TEMP is non-nil
3956 because of the ange-ftp completion handler.
3957 However, it is not necessary to turn / into /:/.
3958 So avoid doing that. */
3959 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
3960 current_buffer
->directory
3961 = concat2 (build_string ("/:"), current_buffer
->directory
);
3963 temp
= get_minibuffer (0);
3964 XBUFFER (temp
)->directory
= current_buffer
->directory
;
3967 /* initialize the buffer routines */
3970 extern Lisp_Object Qdisabled
;
3972 staticpro (&last_overlay_modification_hooks
);
3973 last_overlay_modification_hooks
3974 = Fmake_vector (make_number (10), Qnil
);
3976 staticpro (&Vbuffer_defaults
);
3977 staticpro (&Vbuffer_local_symbols
);
3978 staticpro (&Qfundamental_mode
);
3979 staticpro (&Qmode_class
);
3980 staticpro (&QSFundamental
);
3981 staticpro (&Vbuffer_alist
);
3982 staticpro (&Qprotected_field
);
3983 staticpro (&Qpermanent_local
);
3984 staticpro (&Qkill_buffer_hook
);
3985 Qoverlayp
= intern ("overlayp");
3986 staticpro (&Qoverlayp
);
3987 Qevaporate
= intern ("evaporate");
3988 staticpro (&Qevaporate
);
3989 Qmodification_hooks
= intern ("modification-hooks");
3990 staticpro (&Qmodification_hooks
);
3991 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
3992 staticpro (&Qinsert_in_front_hooks
);
3993 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
3994 staticpro (&Qinsert_behind_hooks
);
3995 Qget_file_buffer
= intern ("get-file-buffer");
3996 staticpro (&Qget_file_buffer
);
3997 Qpriority
= intern ("priority");
3998 staticpro (&Qpriority
);
3999 Qwindow
= intern ("window");
4000 staticpro (&Qwindow
);
4001 Qbefore_string
= intern ("before-string");
4002 staticpro (&Qbefore_string
);
4003 Qafter_string
= intern ("after-string");
4004 staticpro (&Qafter_string
);
4005 Qfirst_change_hook
= intern ("first-change-hook");
4006 staticpro (&Qfirst_change_hook
);
4007 Qbefore_change_functions
= intern ("before-change-functions");
4008 staticpro (&Qbefore_change_functions
);
4009 Qafter_change_functions
= intern ("after-change-functions");
4010 staticpro (&Qafter_change_functions
);
4012 Fput (Qprotected_field
, Qerror_conditions
,
4013 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
4014 Fput (Qprotected_field
, Qerror_message
,
4015 build_string ("Attempt to modify a protected field"));
4017 /* All these use DEFVAR_LISP_NOPRO because the slots in
4018 buffer_defaults will all be marked via Vbuffer_defaults. */
4020 DEFVAR_LISP_NOPRO ("default-mode-line-format",
4021 &buffer_defaults
.mode_line_format
,
4022 "Default value of `mode-line-format' for buffers that don't override it.\n\
4023 This is the same as (default-value 'mode-line-format).");
4025 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
4026 &buffer_defaults
.abbrev_mode
,
4027 "Default value of `abbrev-mode' for buffers that do not override it.\n\
4028 This is the same as (default-value 'abbrev-mode).");
4030 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
4031 &buffer_defaults
.ctl_arrow
,
4032 "Default value of `ctl-arrow' for buffers that do not override it.\n\
4033 This is the same as (default-value 'ctl-arrow).");
4035 DEFVAR_LISP_NOPRO ("default-direction-reversed",
4036 &buffer_defaults
.direction_reversed
,
4037 "Default value of `direction_reversed' for buffers that do not override it.\n\
4038 This is the same as (default-value 'direction-reversed).");
4040 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
4041 &buffer_defaults
.enable_multibyte_characters
,
4042 "Default value of `enable-multibyte-characters' for buffers not overriding it.\n\
4043 This is the same as (default-value 'enable-multibyte-characters).");
4045 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
4046 &buffer_defaults
.buffer_file_coding_system
,
4047 "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\
4048 This is the same as (default-value 'buffer-file-coding-system).");
4050 DEFVAR_LISP_NOPRO ("default-truncate-lines",
4051 &buffer_defaults
.truncate_lines
,
4052 "Default value of `truncate-lines' for buffers that do not override it.\n\
4053 This is the same as (default-value 'truncate-lines).");
4055 DEFVAR_LISP_NOPRO ("default-fill-column",
4056 &buffer_defaults
.fill_column
,
4057 "Default value of `fill-column' for buffers that do not override it.\n\
4058 This is the same as (default-value 'fill-column).");
4060 DEFVAR_LISP_NOPRO ("default-left-margin",
4061 &buffer_defaults
.left_margin
,
4062 "Default value of `left-margin' for buffers that do not override it.\n\
4063 This is the same as (default-value 'left-margin).");
4065 DEFVAR_LISP_NOPRO ("default-tab-width",
4066 &buffer_defaults
.tab_width
,
4067 "Default value of `tab-width' for buffers that do not override it.\n\
4068 This is the same as (default-value 'tab-width).");
4070 DEFVAR_LISP_NOPRO ("default-case-fold-search",
4071 &buffer_defaults
.case_fold_search
,
4072 "Default value of `case-fold-search' for buffers that don't override it.\n\
4073 This is the same as (default-value 'case-fold-search).");
4076 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
4077 &buffer_defaults
.buffer_file_type
,
4078 "Default file type for buffers that do not override it.\n\
4079 This is the same as (default-value 'buffer-file-type).\n\
4080 The file type is nil for text, t for binary.");
4083 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
4086 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
4087 But make-docfile finds it!
4088 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
4090 "Template for displaying mode line for current buffer.\n\
4091 Each buffer has its own value of this variable.\n\
4092 Value may be a string, a symbol or a list or cons cell.\n\
4093 For a symbol, its value is used (but it is ignored if t or nil).\n\
4094 A string appearing directly as the value of a symbol is processed verbatim\n\
4095 in that the %-constructs below are not recognized.\n\
4096 For a list whose car is a symbol, the symbol's value is taken,\n\
4097 and if that is non-nil, the cadr of the list is processed recursively.\n\
4098 Otherwise, the caddr of the list (if there is one) is processed.\n\
4099 For a list whose car is a string or list, each element is processed\n\
4100 recursively and the results are effectively concatenated.\n\
4101 For a list whose car is an integer, the cdr of the list is processed\n\
4102 and padded (if the number is positive) or truncated (if negative)\n\
4103 to the width specified by that number.\n\
4104 A string is printed verbatim in the mode line except for %-constructs:\n\
4105 (%-constructs are allowed when the string is the entire mode-line-format\n\
4106 or when it is found in a cons-cell or a list)\n\
4107 %b -- print buffer name. %f -- print visited file name.\n\
4108 %F -- print frame name.\n\
4109 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
4110 % means buffer is read-only and * means it is modified.\n\
4111 For a modified read-only buffer, %* gives % and %+ gives *.\n\
4112 %s -- print process status. %l -- print the current line number.\n\
4113 %c -- print the current column number (this makes editing slower).\n\
4114 To make the column number update correctly in all cases,\n\
4115 `column-number-mode' must be non-nil.\n\
4116 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
4117 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
4118 or print Bottom or All.\n\
4119 %n -- print Narrow if appropriate.\n\
4120 %t -- print T if file is text, B if binary.\n\
4121 %[ -- print one [ for each recursive editing level. %] similar.\n\
4122 %% -- print %. %- -- print infinitely many dashes.\n\
4123 Decimal digits after the % specify field width to which to pad.");
4126 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
4127 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
4128 nil here means use current buffer's major mode.");
4130 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
4131 make_number (Lisp_Symbol
),
4132 "Symbol for current buffer's major mode.");
4134 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
4135 make_number (Lisp_String
),
4136 "Pretty name of current buffer's major mode (a string).");
4138 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
4139 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
4140 Automatically becomes buffer-local when set in any fashion.");
4142 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
4144 "*Non-nil if searches should ignore case.\n\
4145 Automatically becomes buffer-local when set in any fashion.");
4147 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
4148 make_number (Lisp_Int
),
4149 "*Column beyond which automatic line-wrapping should happen.\n\
4150 Automatically becomes buffer-local when set in any fashion.");
4152 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
4153 make_number (Lisp_Int
),
4154 "*Column for the default indent-line-function to indent to.\n\
4155 Linefeed indents to this column in Fundamental mode.\n\
4156 Automatically becomes buffer-local when set in any fashion.");
4158 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
4159 make_number (Lisp_Int
),
4160 "*Distance between tab stops (for display of tab characters), in columns.\n\
4161 Automatically becomes buffer-local when set in any fashion.");
4163 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
4164 "*Non-nil means display control chars with uparrow.\n\
4165 A value of nil means use backslash and octal digits.\n\
4166 Automatically becomes buffer-local when set in any fashion.\n\
4167 This variable does not apply to characters whose display is specified\n\
4168 in the current display table (if there is one).");
4170 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
4171 ¤t_buffer
->enable_multibyte_characters
,
4173 "*Non-nil means the buffer contents are regarded as multi-byte form\n\
4174 of characters, not a binary code. This affects the display, file I/O,\n\
4175 and behaviors of various editing commands.");
4177 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
4178 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
4179 "Coding system to be used for encoding the buffer contents on saving.\n\
4180 If it is nil, the buffer is saved without any code conversion unless\n\
4181 some coding system is specified in file-coding-system-alist\n\
4182 for the buffer file.\n\
4184 This variable is never applied to a way of decoding\n\
4185 a file while reading it.");
4187 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
4189 "*Non-nil means lines in the buffer are displayed right to left.");
4191 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
4192 "*Non-nil means do not display continuation lines;\n\
4193 give each line of text one screen line.\n\
4194 Automatically becomes buffer-local when set in any fashion.\n\
4196 Note that this is overridden by the variable\n\
4197 `truncate-partial-width-windows' if that variable is non-nil\n\
4198 and this buffer is not full-frame width.");
4201 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
4203 "Non-nil if the visited file is a binary file.\n\
4204 This variable is meaningful on MS-DOG and Windows NT.\n\
4205 On those systems, it is automatically local in every buffer.\n\
4206 On other systems, this variable is normally always nil.");
4209 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
4210 make_number (Lisp_String
),
4211 "Name of default directory of current buffer. Should end with slash.\n\
4212 Each buffer has its own value of this variable.");
4214 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
4216 "Function called (if non-nil) to perform auto-fill.\n\
4217 It is called after self-inserting a space or newline.\n\
4218 Each buffer has its own value of this variable.\n\
4219 NOTE: This variable is not a hook;\n\
4220 its value may not be a list of functions.");
4222 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
4223 make_number (Lisp_String
),
4224 "Name of file visited in current buffer, or nil if not visiting a file.\n\
4225 Each buffer has its own value of this variable.");
4227 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
4228 make_number (Lisp_String
),
4229 "Abbreviated truename of file visited in current buffer, or nil if none.\n\
4230 The truename of a file is calculated by `file-truename'\n\
4231 and then abbreviated with `abbreviate-file-name'.\n\
4232 Each buffer has its own value of this variable.");
4234 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
4235 ¤t_buffer
->auto_save_file_name
,
4236 make_number (Lisp_String
),
4237 "Name of file for auto-saving current buffer,\n\
4238 or nil if buffer should not be auto-saved.\n\
4239 Each buffer has its own value of this variable.");
4241 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
4242 "Non-nil if this buffer is read-only.\n\
4243 Each buffer has its own value of this variable.");
4245 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
4246 "Non-nil if this buffer's file has been backed up.\n\
4247 Backing up is done before the first time the file is saved.\n\
4248 Each buffer has its own value of this variable.");
4250 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
4251 make_number (Lisp_Int
),
4252 "Length of current buffer when last read in, saved or auto-saved.\n\
4254 Each buffer has its own value of this variable.");
4256 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
4258 "Non-nil enables selective display:\n\
4259 Integer N as value means display only lines\n\
4260 that start with less than n columns of space.\n\
4261 A value of t means, after a ^M, all the rest of the line is invisible.\n\
4262 Then ^M's in the file are written into files as newlines.\n\n\
4263 Automatically becomes buffer-local when set in any fashion.");
4266 DEFVAR_PER_BUFFER ("selective-display-ellipses",
4267 ¤t_buffer
->selective_display_ellipses
,
4269 "t means display ... on previous line when a line is invisible.\n\
4270 Automatically becomes buffer-local when set in any fashion.");
4273 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
4274 "Non-nil if self-insertion should replace existing text.\n\
4275 The value should be one of `overwrite-mode-textual',\n\
4276 `overwrite-mode-binary', or nil.\n\
4277 If it is `overwrite-mode-textual', self-insertion still\n\
4278 inserts at the end of a line, and inserts when point is before a tab,\n\
4279 until the tab is filled in.\n\
4280 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
4281 Automatically becomes buffer-local when set in any fashion.");
4283 #if 0 /* The doc string is too long for some compilers,
4284 but make-docfile can find it in this comment. */
4285 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4287 "Display table that controls display of the contents of current buffer.\n\
4288 Automatically becomes buffer-local when set in any fashion.\n\
4289 The display table is a char-table created with `make-display-table'.\n\
4290 The ordinary char-table elements control how to display each possible text\n\
4291 character. Each value should be a vector of characters or nil;\n\
4292 nil means display the character in the default fashion.\n\
4293 There are six extra slots to control the display of\n\
4294 the end of a truncated screen line (extra-slot 0, a single character);\n\
4295 the end of a continued line (extra-slot 1, a single character);\n\
4296 the escape character used to display character codes in octal\n\
4297 (extra-slot 2, a single character);\n\
4298 the character used as an arrow for control characters (extra-slot 3,\n\
4299 a single character);\n\
4300 the decoration indicating the presence of invisible lines (extra-slot 4,\n\
4301 a vector of characters);\n\
4302 the character used to draw the border between side-by-side windows\n\
4303 (extra-slot 5, a single character).\n\
4304 See also the functions `display-table-slot' and `set-display-table-slot'.\n\
4305 If this variable is nil, the value of `standard-display-table' is used.\n\
4306 Each window can have its own, overriding display table.");
4308 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4311 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
4314 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
4315 "If non-nil, a function to call before each text change (obsolete).\n\
4316 Two arguments are passed to the function: the positions of\n\
4317 the beginning and end of the range of old text to be changed.\n\
4318 \(For an insertion, the beginning and end are at the same place.)\n\
4319 No information is given about the length of the text after the change.\n\
4321 Buffer changes made while executing the `before-change-function'\n\
4322 don't call any before-change or after-change functions.\n\
4323 That's because these variables are temporarily set to nil.\n\
4324 As a result, a hook function cannot straightforwardly alter the value of\n\
4325 these variables. See the Emacs Lisp manual for a way of\n\
4326 accomplishing an equivalent result by using other variables.\n\n\
4327 This variable is obsolete; use `before-change-functions' instead.");
4328 Vbefore_change_function
= Qnil
;
4330 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
4331 "If non-nil, a Function to call after each text change (obsolete).\n\
4332 Three arguments are passed to the function: the positions of\n\
4333 the beginning and end of the range of changed text,\n\
4334 and the length 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-function'\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.\n\n\
4345 This variable is obsolete; use `after-change-functions' instead.");
4346 Vafter_change_function
= Qnil
;
4348 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
4349 "List of functions to call before each text change.\n\
4350 Two arguments are passed to each function: the positions of\n\
4351 the beginning and end of the range of old text to be changed.\n\
4352 \(For an insertion, the beginning and end are at the same place.)\n\
4353 No information is given about the length of the text after the change.\n\
4355 Buffer changes made while executing the `before-change-functions'\n\
4356 don't call any before-change or after-change functions.\n\
4357 That's because these variables are temporarily set to nil.\n\
4358 As a result, a hook function cannot straightforwardly alter the value of\n\
4359 these variables. See the Emacs Lisp manual for a way of\n\
4360 accomplishing an equivalent result by using other variables.");
4361 Vbefore_change_functions
= Qnil
;
4363 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
4364 "List of function to call after each text change.\n\
4365 Three arguments are passed to each function: the positions of\n\
4366 the beginning and end of the range of changed text,\n\
4367 and the length in bytes of the pre-change text replaced by that range.\n\
4368 \(For an insertion, the pre-change length is zero;\n\
4369 for a deletion, that length is the number of bytes deleted,\n\
4370 and the post-change beginning and end are at the same place.)\n\
4372 Buffer changes made while executing the `after-change-functions'\n\
4373 don't call any before-change or after-change functions.\n\
4374 That's because these variables are temporarily set to nil.\n\
4375 As a result, a hook function cannot straightforwardly alter the value of\n\
4376 these variables. See the Emacs Lisp manual for a way of\n\
4377 accomplishing an equivalent result by using other variables.");
4379 Vafter_change_functions
= Qnil
;
4381 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
4382 "A list of functions to call before changing a buffer which is unmodified.\n\
4383 The functions are run using the `run-hooks' function.");
4384 Vfirst_change_hook
= Qnil
;
4386 #if 0 /* The doc string is too long for some compilers,
4387 but make-docfile can find it in this comment. */
4388 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4389 "List of undo entries in current buffer.\n\
4390 Recent changes come first; older changes follow newer.\n\
4392 An entry (BEG . END) represents an insertion which begins at\n\
4393 position BEG and ends at position END.\n\
4395 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
4396 from (abs POSITION). If POSITION is positive, point was at the front\n\
4397 of the text being deleted; if negative, point was at the end.\n\
4399 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
4400 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
4401 of the visited file's modification time, as of that time. If the\n\
4402 modification time of the most recent save is different, this entry is\n\
4405 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
4406 was modified between BEG and END. PROPERTY is the property name,\n\
4407 and VALUE is the old value.\n\
4409 An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
4410 was adjusted in position by the offset DISTANCE (an integer).\n\
4412 An entry of the form POSITION indicates that point was at the buffer\n\
4413 location given by the integer. Undoing an entry of this form places\n\
4414 point at POSITION.\n\
4416 nil marks undo boundaries. The undo command treats the changes\n\
4417 between two undo boundaries as a single step to be undone.\n\
4419 If the value of the variable is t, undo information is not recorded.");
4421 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4424 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
4425 "Non-nil means the mark and region are currently active in this buffer.\n\
4426 Automatically local in all buffers.");
4428 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
4429 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
4430 This variable is buffer-local, in all buffers.\n\
4432 Normally, the line-motion functions work by scanning the buffer for\n\
4433 newlines. Columnar operations (like move-to-column and\n\
4434 compute-motion) also work by scanning the buffer, summing character\n\
4435 widths as they go. This works well for ordinary text, but if the\n\
4436 buffer's lines are very long (say, more than 500 characters), these\n\
4437 motion functions will take longer to execute. Emacs may also take\n\
4438 longer to update the display.\n\
4440 If cache-long-line-scans is non-nil, these motion functions cache the\n\
4441 results of their scans, and consult the cache to avoid rescanning\n\
4442 regions of the buffer until the text is modified. The caches are most\n\
4443 beneficial when they prevent the most searching---that is, when the\n\
4444 buffer contains long lines and large regions of characters with the\n\
4445 same, fixed screen width.\n\
4447 When cache-long-line-scans is non-nil, processing short lines will\n\
4448 become slightly slower (because of the overhead of consulting the\n\
4449 cache), and the caches will use memory roughly proportional to the\n\
4450 number of newlines and characters whose screen width varies.\n\
4452 The caches require no explicit maintenance; their accuracy is\n\
4453 maintained internally by the Emacs primitives. Enabling or disabling\n\
4454 the cache should not affect the behavior of any of the motion\n\
4455 functions; it should only affect their performance.");
4457 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
4458 "Value of point before the last series of scroll operations, or nil.");
4460 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
4461 "List of formats to use when saving this buffer.\n\
4462 Formats are defined by `format-alist'. This variable is\n\
4463 set when a file is visited. Automatically local in all buffers.");
4465 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
4466 ¤t_buffer
->invisibility_spec
, Qnil
,
4467 "Invisibility spec of this buffer.\n\
4468 The default is t, which means that text is invisible\n\
4469 if it has a non-nil `invisible' property.\n\
4470 If the value is a list, a text character is invisible if its `invisible'\n\
4471 property is an element in that list.\n\
4472 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
4473 then characters with property value PROP are invisible,\n\
4474 and they have an ellipsis as well if ELLIPSIS is non-nil.");
4476 DEFVAR_PER_BUFFER ("buffer-display-count",
4477 ¤t_buffer
->display_count
, Qnil
,
4478 "A number incremented each time the buffer is displayed in a window.");
4480 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
4481 "*Non-nil means deactivate the mark when the buffer contents change.\n\
4482 Non-nil also enables highlighting of the region whenever the mark is active.\n\
4483 The variable `highlight-nonselected-windows' controls whether to highlight\n\
4484 all windows or just the selected window.");
4485 Vtransient_mark_mode
= Qnil
;
4487 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
4488 "*Non-nil means disregard read-only status of buffers or characters.\n\
4489 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
4490 text properties. If the value is a list, disregard `buffer-read-only'\n\
4491 and disregard a `read-only' text property if the property value\n\
4492 is a member of the list.");
4493 Vinhibit_read_only
= Qnil
;
4495 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
4496 "List of functions called with no args to query before killing a buffer.");
4497 Vkill_buffer_query_functions
= Qnil
;
4499 defsubr (&Sbuffer_live_p
);
4500 defsubr (&Sbuffer_list
);
4501 defsubr (&Sget_buffer
);
4502 defsubr (&Sget_file_buffer
);
4503 defsubr (&Sget_buffer_create
);
4504 defsubr (&Smake_indirect_buffer
);
4505 defsubr (&Sgenerate_new_buffer_name
);
4506 defsubr (&Sbuffer_name
);
4507 /*defsubr (&Sbuffer_number);*/
4508 defsubr (&Sbuffer_file_name
);
4509 defsubr (&Sbuffer_base_buffer
);
4510 defsubr (&Sbuffer_local_variables
);
4511 defsubr (&Sbuffer_modified_p
);
4512 defsubr (&Sset_buffer_modified_p
);
4513 defsubr (&Sbuffer_modified_tick
);
4514 defsubr (&Srename_buffer
);
4515 defsubr (&Sother_buffer
);
4516 defsubr (&Sbuffer_disable_undo
);
4517 defsubr (&Sbuffer_enable_undo
);
4518 defsubr (&Skill_buffer
);
4519 defsubr (&Sset_buffer_major_mode
);
4520 defsubr (&Sswitch_to_buffer
);
4521 defsubr (&Spop_to_buffer
);
4522 defsubr (&Scurrent_buffer
);
4523 defsubr (&Sset_buffer
);
4524 defsubr (&Sbarf_if_buffer_read_only
);
4525 defsubr (&Sbury_buffer
);
4526 defsubr (&Serase_buffer
);
4527 defsubr (&Sset_buffer_multibyte
);
4528 defsubr (&Skill_all_local_variables
);
4530 defsubr (&Soverlayp
);
4531 defsubr (&Smake_overlay
);
4532 defsubr (&Sdelete_overlay
);
4533 defsubr (&Smove_overlay
);
4534 defsubr (&Soverlay_start
);
4535 defsubr (&Soverlay_end
);
4536 defsubr (&Soverlay_buffer
);
4537 defsubr (&Soverlay_properties
);
4538 defsubr (&Soverlays_at
);
4539 defsubr (&Soverlays_in
);
4540 defsubr (&Snext_overlay_change
);
4541 defsubr (&Sprevious_overlay_change
);
4542 defsubr (&Soverlay_recenter
);
4543 defsubr (&Soverlay_lists
);
4544 defsubr (&Soverlay_get
);
4545 defsubr (&Soverlay_put
);
4550 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
4551 initial_define_key (control_x_map
, 'k', "kill-buffer");
4553 /* This must not be in syms_of_buffer, because Qdisabled is not
4554 initialized when that function gets called. */
4555 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);