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
)->realvalue
,
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
)->realvalue
,
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 /* Do nothing if nothing actually changes. */
1720 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
1723 /* It would be better to update the list,
1724 but this is good enough for now. */
1725 if (! EQ (current_buffer
->undo_list
, Qt
))
1726 current_buffer
->undo_list
= Qnil
;
1728 /* If the cached position is for this buffer, clear it out. */
1729 clear_charpos_cache (current_buffer
);
1733 /* Do this first, so it can use CHAR_TO_BYTE
1734 to calculate the old correspondences. */
1735 set_intervals_multibyte (0);
1737 current_buffer
->enable_multibyte_characters
= Qnil
;
1743 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
1745 tail
= BUF_MARKERS (current_buffer
);
1746 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1748 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
1749 tail
= XMARKER (tail
)->chain
;
1754 /* Be sure not to have a multibyte sequence striding over the GAP.
1755 Ex: We change this: "...abc\201\241\241 _GAP_ \241\241\241..."
1756 to: "...abc _GAP_ \201\241\241\241\241\241..." */
1758 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
1759 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
1761 unsigned char *p
= GPT_ADDR
- 1;
1763 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
1764 if (BASE_LEADING_CODE_P (*p
))
1766 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
1768 move_gap_both (new_gpt
, new_gpt
);
1772 /* Do this first, so that chars_in_text asks the right question.
1773 set_intervals_multibyte needs it too. */
1774 current_buffer
->enable_multibyte_characters
= Qt
;
1776 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
1777 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
1779 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
1781 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
1782 if (BEGV_BYTE
> GPT_BYTE
)
1783 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
1785 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
1787 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
1788 if (ZV_BYTE
> GPT_BYTE
)
1789 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
1791 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
1794 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
1797 if (pt_byte
> GPT_BYTE
)
1798 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
1800 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
1801 TEMP_SET_PT_BOTH (pt
, pt_byte
);
1804 tail
= markers
= BUF_MARKERS (current_buffer
);
1805 BUF_MARKERS (current_buffer
) = Qnil
;
1807 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1809 XMARKER (tail
)->bytepos
1810 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
1811 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
1813 tail
= XMARKER (tail
)->chain
;
1815 BUF_MARKERS (current_buffer
) = markers
;
1817 /* Do this last, so it can calculate the new correspondences
1818 between chars and bytes. */
1819 set_intervals_multibyte (1);
1825 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1827 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1828 Most local variable bindings are eliminated so that the default values\n\
1829 become effective once more. Also, the syntax table is set from\n\
1830 `standard-syntax-table', the local keymap is set to nil,\n\
1831 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1832 This function also forces redisplay of the mode line.\n\
1834 Every function to select a new major mode starts by\n\
1835 calling this function.\n\n\
1836 As a special exception, local variables whose names have\n\
1837 a non-nil `permanent-local' property are not eliminated by this function.\n\
1839 The first thing this function does is run\n\
1840 the normal hook `change-major-mode-hook'.")
1843 register Lisp_Object alist
, sym
, tem
;
1846 if (!NILP (Vrun_hooks
))
1847 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1848 oalist
= current_buffer
->local_var_alist
;
1850 /* Make sure none of the bindings in oalist
1851 remain swapped in, in their symbols. */
1853 swap_out_buffer_local_variables (current_buffer
);
1855 /* Actually eliminate all local bindings of this buffer. */
1857 reset_buffer_local_variables (current_buffer
, 0);
1859 /* Redisplay mode lines; we are changing major mode. */
1861 update_mode_lines
++;
1863 /* Any which are supposed to be permanent,
1864 make local again, with the same values they had. */
1866 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1868 sym
= XCONS (XCONS (alist
)->car
)->car
;
1869 tem
= Fget (sym
, Qpermanent_local
);
1872 Fmake_local_variable (sym
);
1873 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1877 /* Force mode-line redisplay. Useful here because all major mode
1878 commands call this function. */
1879 update_mode_lines
++;
1884 /* Make sure no local variables remain set up with buffer B
1885 for their current values. */
1888 swap_out_buffer_local_variables (b
)
1891 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
1893 XSETBUFFER (buffer
, b
);
1894 oalist
= b
->local_var_alist
;
1896 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1898 sym
= XCONS (XCONS (alist
)->car
)->car
;
1900 /* Need not do anything if some other buffer's binding is now encached. */
1901 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
;
1902 if (XBUFFER (tem
) == current_buffer
)
1904 /* Symbol is set up for this buffer's old local value.
1905 Set it up for the current buffer with the default value. */
1907 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
;
1908 /* Store the symbol's current value into the alist entry
1909 it is currently set up for. This is so that, if the
1910 local is marked permanent, and we make it local again
1911 later in Fkill_all_local_variables, we don't lose the value. */
1912 XCONS (XCONS (tem
)->car
)->cdr
1913 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
);
1914 /* Switch to the symbol's default-value alist entry. */
1915 XCONS (tem
)->car
= tem
;
1916 /* Mark it as current for buffer B. */
1917 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
= buffer
;
1918 /* Store the current value into any forwarding in the symbol. */
1919 store_symval_forwarding (sym
,
1920 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
,
1926 /* Find all the overlays in the current buffer that contain position POS.
1927 Return the number found, and store them in a vector in *VEC_PTR.
1928 Store in *LEN_PTR the size allocated for the vector.
1929 Store in *NEXT_PTR the next position after POS where an overlay starts,
1930 or ZV if there are no more overlays.
1931 Store in *PREV_PTR the previous position before POS where an overlay ends,
1932 or BEGV if there are no previous overlays.
1933 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
1935 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1936 when this function is called.
1938 If EXTEND is non-zero, we make the vector bigger if necessary.
1939 If EXTEND is zero, we never extend the vector,
1940 and we store only as many overlays as will fit.
1941 But we still return the total number of overlays. */
1944 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
1947 Lisp_Object
**vec_ptr
;
1952 Lisp_Object tail
, overlay
, start
, end
, result
;
1955 Lisp_Object
*vec
= *vec_ptr
;
1958 int inhibit_storing
= 0;
1960 for (tail
= current_buffer
->overlays_before
;
1962 tail
= XCONS (tail
)->cdr
)
1964 int startpos
, endpos
;
1966 overlay
= XCONS (tail
)->car
;
1968 start
= OVERLAY_START (overlay
);
1969 end
= OVERLAY_END (overlay
);
1970 endpos
= OVERLAY_POSITION (end
);
1979 startpos
= OVERLAY_POSITION (start
);
1980 if (startpos
<= pos
)
1984 /* The supplied vector is full.
1985 Either make it bigger, or don't store any more in it. */
1988 *len_ptr
= len
*= 2;
1989 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1993 inhibit_storing
= 1;
1996 if (!inhibit_storing
)
1998 /* Keep counting overlays even if we can't return them all. */
2001 else if (startpos
< next
)
2005 for (tail
= current_buffer
->overlays_after
;
2007 tail
= XCONS (tail
)->cdr
)
2009 int startpos
, endpos
;
2011 overlay
= XCONS (tail
)->car
;
2013 start
= OVERLAY_START (overlay
);
2014 end
= OVERLAY_END (overlay
);
2015 startpos
= OVERLAY_POSITION (start
);
2018 if (startpos
< next
)
2022 endpos
= OVERLAY_POSITION (end
);
2029 *len_ptr
= len
*= 2;
2030 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2034 inhibit_storing
= 1;
2037 if (!inhibit_storing
)
2041 else if (endpos
< pos
&& endpos
> prev
)
2052 /* Find all the overlays in the current buffer that overlap the range BEG-END
2053 or are empty at BEG.
2055 Return the number found, and store them in a vector in *VEC_PTR.
2056 Store in *LEN_PTR the size allocated for the vector.
2057 Store in *NEXT_PTR the next position after POS where an overlay starts,
2058 or ZV if there are no more overlays.
2059 Store in *PREV_PTR the previous position before POS where an overlay ends,
2060 or BEGV if there are no previous overlays.
2061 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2063 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2064 when this function is called.
2066 If EXTEND is non-zero, we make the vector bigger if necessary.
2067 If EXTEND is zero, we never extend the vector,
2068 and we store only as many overlays as will fit.
2069 But we still return the total number of overlays. */
2072 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2075 Lisp_Object
**vec_ptr
;
2080 Lisp_Object tail
, overlay
, ostart
, oend
, result
;
2083 Lisp_Object
*vec
= *vec_ptr
;
2086 int inhibit_storing
= 0;
2088 for (tail
= current_buffer
->overlays_before
;
2090 tail
= XCONS (tail
)->cdr
)
2092 int startpos
, endpos
;
2094 overlay
= XCONS (tail
)->car
;
2096 ostart
= OVERLAY_START (overlay
);
2097 oend
= OVERLAY_END (overlay
);
2098 endpos
= OVERLAY_POSITION (oend
);
2105 startpos
= OVERLAY_POSITION (ostart
);
2106 /* Count an interval if it either overlaps the range
2107 or is empty at the start of the range. */
2108 if ((beg
< endpos
&& startpos
< end
)
2109 || (startpos
== endpos
&& beg
== endpos
))
2113 /* The supplied vector is full.
2114 Either make it bigger, or don't store any more in it. */
2117 *len_ptr
= len
*= 2;
2118 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2122 inhibit_storing
= 1;
2125 if (!inhibit_storing
)
2127 /* Keep counting overlays even if we can't return them all. */
2130 else if (startpos
< next
)
2134 for (tail
= current_buffer
->overlays_after
;
2136 tail
= XCONS (tail
)->cdr
)
2138 int startpos
, endpos
;
2140 overlay
= XCONS (tail
)->car
;
2142 ostart
= OVERLAY_START (overlay
);
2143 oend
= OVERLAY_END (overlay
);
2144 startpos
= OVERLAY_POSITION (ostart
);
2147 if (startpos
< next
)
2151 endpos
= OVERLAY_POSITION (oend
);
2152 /* Count an interval if it either overlaps the range
2153 or is empty at the start of the range. */
2154 if ((beg
< endpos
&& startpos
< end
)
2155 || (startpos
== endpos
&& beg
== endpos
))
2161 *len_ptr
= len
*= 2;
2162 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2166 inhibit_storing
= 1;
2169 if (!inhibit_storing
)
2173 else if (endpos
< beg
&& endpos
> prev
)
2184 /* Fast function to just test if we're at an overlay boundary. */
2186 overlay_touches_p (pos
)
2189 Lisp_Object tail
, overlay
;
2191 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2192 tail
= XCONS (tail
)->cdr
)
2196 overlay
= XCONS (tail
)->car
;
2197 if (!GC_OVERLAYP (overlay
))
2200 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2203 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2207 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2208 tail
= XCONS (tail
)->cdr
)
2212 overlay
= XCONS (tail
)->car
;
2213 if (!GC_OVERLAYP (overlay
))
2216 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2219 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2227 Lisp_Object overlay
;
2233 compare_overlays (s1
, s2
)
2234 struct sortvec
*s1
, *s2
;
2236 if (s1
->priority
!= s2
->priority
)
2237 return s1
->priority
- s2
->priority
;
2238 if (s1
->beg
!= s2
->beg
)
2239 return s1
->beg
- s2
->beg
;
2240 if (s1
->end
!= s2
->end
)
2241 return s2
->end
- s1
->end
;
2245 /* Sort an array of overlays by priority. The array is modified in place.
2246 The return value is the new size; this may be smaller than the original
2247 size if some of the overlays were invalid or were window-specific. */
2249 sort_overlays (overlay_vec
, noverlays
, w
)
2250 Lisp_Object
*overlay_vec
;
2255 struct sortvec
*sortvec
;
2256 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2258 /* Put the valid and relevant overlays into sortvec. */
2260 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2263 Lisp_Object overlay
;
2265 overlay
= overlay_vec
[i
];
2266 if (OVERLAY_VALID (overlay
)
2267 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2268 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2270 /* If we're interested in a specific window, then ignore
2271 overlays that are limited to some other window. */
2276 window
= Foverlay_get (overlay
, Qwindow
);
2277 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2281 /* This overlay is good and counts: put it into sortvec. */
2282 sortvec
[j
].overlay
= overlay
;
2283 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2284 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2285 tem
= Foverlay_get (overlay
, Qpriority
);
2287 sortvec
[j
].priority
= XINT (tem
);
2289 sortvec
[j
].priority
= 0;
2295 /* Sort the overlays into the proper order: increasing priority. */
2298 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2300 for (i
= 0; i
< noverlays
; i
++)
2301 overlay_vec
[i
] = sortvec
[i
].overlay
;
2307 Lisp_Object string
, string2
;
2314 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2315 int size
; /* Allocated length of that array. */
2316 int used
; /* How much of the array is currently in use. */
2317 int bytes
; /* Total length of the strings in buf. */
2320 /* Buffers for storing information about the overlays touching a given
2321 position. These could be automatic variables in overlay_strings, but
2322 it's more efficient to hold onto the memory instead of repeatedly
2323 allocating and freeing it. */
2324 static struct sortstrlist overlay_heads
, overlay_tails
;
2325 static unsigned char *overlay_str_buf
;
2327 /* Allocated length of overlay_str_buf. */
2328 static int overlay_str_len
;
2330 /* A comparison function suitable for passing to qsort. */
2332 cmp_for_strings (as1
, as2
)
2335 struct sortstr
*s1
= (struct sortstr
*)as1
;
2336 struct sortstr
*s2
= (struct sortstr
*)as2
;
2337 if (s1
->size
!= s2
->size
)
2338 return s2
->size
- s1
->size
;
2339 if (s1
->priority
!= s2
->priority
)
2340 return s1
->priority
- s2
->priority
;
2345 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2346 struct sortstrlist
*ssl
;
2347 Lisp_Object str
, str2
, pri
;
2352 if (ssl
->used
== ssl
->size
)
2358 ssl
->buf
= ((struct sortstr
*)
2359 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2361 ssl
->buf
[ssl
->used
].string
= str
;
2362 ssl
->buf
[ssl
->used
].string2
= str2
;
2363 ssl
->buf
[ssl
->used
].size
= size
;
2364 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2367 if (NILP (current_buffer
->enable_multibyte_characters
))
2368 nbytes
= XSTRING (str
)->size
;
2369 else if (! STRING_MULTIBYTE (str
))
2370 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2371 STRING_BYTES (XSTRING (str
)));
2373 nbytes
= STRING_BYTES (XSTRING (str
));
2375 ssl
->bytes
+= nbytes
;
2379 if (NILP (current_buffer
->enable_multibyte_characters
))
2380 nbytes
= XSTRING (str2
)->size
;
2381 else if (! STRING_MULTIBYTE (str2
))
2382 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2383 STRING_BYTES (XSTRING (str2
)));
2385 nbytes
= STRING_BYTES (XSTRING (str2
));
2387 ssl
->bytes
+= nbytes
;
2391 /* Return the concatenation of the strings associated with overlays that
2392 begin or end at POS, ignoring overlays that are specific to a window
2393 other than W. The strings are concatenated in the appropriate order:
2394 shorter overlays nest inside longer ones, and higher priority inside
2395 lower. Normally all of the after-strings come first, but zero-sized
2396 overlays have their after-strings ride along with the before-strings
2397 because it would look strange to print them inside-out.
2399 Returns the string length, and stores the contents indirectly through
2400 PSTR, if that variable is non-null. The string may be overwritten by
2401 subsequent calls. */
2404 overlay_strings (pos
, w
, pstr
)
2407 unsigned char **pstr
;
2409 Lisp_Object ov
, overlay
, window
, str
;
2410 int startpos
, endpos
;
2411 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2413 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2414 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2415 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2417 overlay
= XCONS (ov
)->car
;
2418 if (!OVERLAYP (overlay
))
2421 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2422 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2425 if (endpos
!= pos
&& startpos
!= pos
)
2427 window
= Foverlay_get (overlay
, Qwindow
);
2428 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2431 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2432 record_overlay_string (&overlay_heads
, str
,
2434 ? Foverlay_get (overlay
, Qafter_string
)
2436 Foverlay_get (overlay
, Qpriority
),
2438 else if (endpos
== pos
2439 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2440 record_overlay_string (&overlay_tails
, str
, Qnil
,
2441 Foverlay_get (overlay
, Qpriority
),
2444 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2446 overlay
= XCONS (ov
)->car
;
2447 if (!OVERLAYP (overlay
))
2450 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2451 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2454 if (endpos
!= pos
&& startpos
!= pos
)
2456 window
= Foverlay_get (overlay
, Qwindow
);
2457 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2460 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2461 record_overlay_string (&overlay_heads
, str
,
2463 ? Foverlay_get (overlay
, Qafter_string
)
2465 Foverlay_get (overlay
, Qpriority
),
2467 else if (endpos
== pos
2468 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2469 record_overlay_string (&overlay_tails
, str
, Qnil
,
2470 Foverlay_get (overlay
, Qpriority
),
2473 if (overlay_tails
.used
> 1)
2474 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2476 if (overlay_heads
.used
> 1)
2477 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2479 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2484 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2486 if (total
> overlay_str_len
)
2488 overlay_str_len
= total
;
2489 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2492 p
= overlay_str_buf
;
2493 for (i
= overlay_tails
.used
; --i
>= 0;)
2496 tem
= overlay_tails
.buf
[i
].string
;
2497 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2498 STRING_BYTES (XSTRING (tem
)),
2499 STRING_MULTIBYTE (tem
), multibyte
);
2502 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2505 tem
= overlay_heads
.buf
[i
].string
;
2506 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2507 STRING_BYTES (XSTRING (tem
)),
2508 STRING_MULTIBYTE (tem
), multibyte
);
2510 tem
= overlay_heads
.buf
[i
].string2
;
2513 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2514 STRING_BYTES (XSTRING (tem
)),
2515 STRING_MULTIBYTE (tem
), multibyte
);
2519 if (p
!= overlay_str_buf
+ total
)
2522 *pstr
= overlay_str_buf
;
2528 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2531 recenter_overlay_lists (buf
, pos
)
2535 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2537 /* See if anything in overlays_before should move to overlays_after. */
2539 /* We don't strictly need prev in this loop; it should always be nil.
2540 But we use it for symmetry and in case that should cease to be true
2541 with some future change. */
2543 for (tail
= buf
->overlays_before
;
2545 prev
= tail
, tail
= next
)
2547 next
= XCONS (tail
)->cdr
;
2548 overlay
= XCONS (tail
)->car
;
2550 /* If the overlay is not valid, get rid of it. */
2551 if (!OVERLAY_VALID (overlay
))
2556 /* Splice the cons cell TAIL out of overlays_before. */
2558 XCONS (prev
)->cdr
= next
;
2560 buf
->overlays_before
= next
;
2566 beg
= OVERLAY_START (overlay
);
2567 end
= OVERLAY_END (overlay
);
2569 if (OVERLAY_POSITION (end
) > pos
)
2571 /* OVERLAY needs to be moved. */
2572 int where
= OVERLAY_POSITION (beg
);
2573 Lisp_Object other
, other_prev
;
2575 /* Splice the cons cell TAIL out of overlays_before. */
2577 XCONS (prev
)->cdr
= next
;
2579 buf
->overlays_before
= next
;
2581 /* Search thru overlays_after for where to put it. */
2583 for (other
= buf
->overlays_after
;
2585 other_prev
= other
, other
= XCONS (other
)->cdr
)
2587 Lisp_Object otherbeg
, otheroverlay
, follower
;
2590 otheroverlay
= XCONS (other
)->car
;
2591 if (! OVERLAY_VALID (otheroverlay
))
2594 otherbeg
= OVERLAY_START (otheroverlay
);
2595 if (OVERLAY_POSITION (otherbeg
) >= where
)
2599 /* Add TAIL to overlays_after before OTHER. */
2600 XCONS (tail
)->cdr
= other
;
2601 if (!NILP (other_prev
))
2602 XCONS (other_prev
)->cdr
= tail
;
2604 buf
->overlays_after
= tail
;
2608 /* We've reached the things that should stay in overlays_before.
2609 All the rest of overlays_before must end even earlier,
2614 /* See if anything in overlays_after should be in overlays_before. */
2616 for (tail
= buf
->overlays_after
;
2618 prev
= tail
, tail
= next
)
2620 next
= XCONS (tail
)->cdr
;
2621 overlay
= XCONS (tail
)->car
;
2623 /* If the overlay is not valid, get rid of it. */
2624 if (!OVERLAY_VALID (overlay
))
2629 /* Splice the cons cell TAIL out of overlays_after. */
2631 XCONS (prev
)->cdr
= next
;
2633 buf
->overlays_after
= next
;
2639 beg
= OVERLAY_START (overlay
);
2640 end
= OVERLAY_END (overlay
);
2642 /* Stop looking, when we know that nothing further
2643 can possibly end before POS. */
2644 if (OVERLAY_POSITION (beg
) > pos
)
2647 if (OVERLAY_POSITION (end
) <= pos
)
2649 /* OVERLAY needs to be moved. */
2650 int where
= OVERLAY_POSITION (end
);
2651 Lisp_Object other
, other_prev
;
2653 /* Splice the cons cell TAIL out of overlays_after. */
2655 XCONS (prev
)->cdr
= next
;
2657 buf
->overlays_after
= next
;
2659 /* Search thru overlays_before for where to put it. */
2661 for (other
= buf
->overlays_before
;
2663 other_prev
= other
, other
= XCONS (other
)->cdr
)
2665 Lisp_Object otherend
, otheroverlay
;
2668 otheroverlay
= XCONS (other
)->car
;
2669 if (! OVERLAY_VALID (otheroverlay
))
2672 otherend
= OVERLAY_END (otheroverlay
);
2673 if (OVERLAY_POSITION (otherend
) <= where
)
2677 /* Add TAIL to overlays_before before OTHER. */
2678 XCONS (tail
)->cdr
= other
;
2679 if (!NILP (other_prev
))
2680 XCONS (other_prev
)->cdr
= tail
;
2682 buf
->overlays_before
= tail
;
2687 XSETFASTINT (buf
->overlay_center
, pos
);
2691 adjust_overlays_for_insert (pos
, length
)
2695 /* After an insertion, the lists are still sorted properly,
2696 but we may need to update the value of the overlay center. */
2697 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
2698 XSETFASTINT (current_buffer
->overlay_center
,
2699 XFASTINT (current_buffer
->overlay_center
) + length
);
2703 adjust_overlays_for_delete (pos
, length
)
2707 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
2708 /* The deletion was to our right. No change needed; the before- and
2709 after-lists are still consistent. */
2711 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
2712 /* The deletion was to our left. We need to adjust the center value
2713 to account for the change in position, but the lists are consistent
2714 given the new value. */
2715 XSETFASTINT (current_buffer
->overlay_center
,
2716 XFASTINT (current_buffer
->overlay_center
) - length
);
2718 /* We're right in the middle. There might be things on the after-list
2719 that now belong on the before-list. Recentering will move them,
2720 and also update the center point. */
2721 recenter_overlay_lists (current_buffer
, pos
);
2724 /* Fix up overlays that were garbled as a result of permuting markers
2725 in the range START through END. Any overlay with at least one
2726 endpoint in this range will need to be unlinked from the overlay
2727 list and reinserted in its proper place.
2728 Such an overlay might even have negative size at this point.
2729 If so, we'll reverse the endpoints. Can you think of anything
2730 better to do in this situation? */
2732 fix_overlays_in_range (start
, end
)
2733 register int start
, end
;
2735 Lisp_Object tem
, overlay
;
2736 Lisp_Object before_list
, after_list
;
2737 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
2738 int startpos
, endpos
;
2740 /* This algorithm shifts links around instead of consing and GCing.
2741 The loop invariant is that before_list (resp. after_list) is a
2742 well-formed list except that its last element, the one that
2743 *pbefore (resp. *pafter) points to, is still uninitialized.
2744 So it's not a bug that before_list isn't initialized, although
2745 it may look strange. */
2746 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
2748 overlay
= XCONS (*ptail
)->car
;
2749 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2752 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2754 || (startpos
>= start
&& startpos
< end
))
2756 /* If the overlay is backwards, fix that now. */
2757 if (startpos
> endpos
)
2760 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2762 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2764 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2766 /* Add it to the end of the wrong list. Later on,
2767 recenter_overlay_lists will move it to the right place. */
2768 if (endpos
< XINT (current_buffer
->overlay_center
))
2771 pafter
= &XCONS (*ptail
)->cdr
;
2776 pbefore
= &XCONS (*ptail
)->cdr
;
2778 *ptail
= XCONS (*ptail
)->cdr
;
2781 ptail
= &XCONS (*ptail
)->cdr
;
2783 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
2785 overlay
= XCONS (*ptail
)->car
;
2786 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2787 if (startpos
>= end
)
2789 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2790 if (startpos
>= start
2791 || (endpos
>= start
&& endpos
< end
))
2793 if (startpos
> endpos
)
2796 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2798 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2800 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2802 if (endpos
< XINT (current_buffer
->overlay_center
))
2805 pafter
= &XCONS (*ptail
)->cdr
;
2810 pbefore
= &XCONS (*ptail
)->cdr
;
2812 *ptail
= XCONS (*ptail
)->cdr
;
2815 ptail
= &XCONS (*ptail
)->cdr
;
2818 /* Splice the constructed (wrong) lists into the buffer's lists,
2819 and let the recenter function make it sane again. */
2820 *pbefore
= current_buffer
->overlays_before
;
2821 current_buffer
->overlays_before
= before_list
;
2822 recenter_overlay_lists (current_buffer
,
2823 XINT (current_buffer
->overlay_center
));
2825 *pafter
= current_buffer
->overlays_after
;
2826 current_buffer
->overlays_after
= after_list
;
2827 recenter_overlay_lists (current_buffer
,
2828 XINT (current_buffer
->overlay_center
));
2831 /* We have two types of overlay: the one whose ending marker is
2832 after-insertion-marker (this is the usual case) and the one whose
2833 ending marker is before-insertion-marker. When `overlays_before'
2834 contains overlays of the latter type and the former type in this
2835 order and both overlays end at inserting position, inserting a text
2836 increases only the ending marker of the latter type, which results
2837 in incorrect ordering of `overlays_before'.
2839 This function fixes ordering of overlays in the slot
2840 `overlays_before' of the buffer *BP. Before the insertion, `point'
2841 was at PREV, and now is at POS. */
2844 fix_overlays_before (bp
, prev
, pos
)
2848 Lisp_Object
*tailp
= &bp
->overlays_before
;
2849 Lisp_Object
*right_place
;
2852 /* After the insertion, the several overlays may be in incorrect
2853 order. The possibility is that, in the list `overlays_before',
2854 an overlay which ends at POS appears after an overlay which ends
2855 at PREV. Since POS is greater than PREV, we must fix the
2856 ordering of these overlays, by moving overlays ends at POS before
2857 the overlays ends at PREV. */
2859 /* At first, find a place where disordered overlays should be linked
2860 in. It is where an overlay which end before POS exists. (i.e. an
2861 overlay whose ending marker is after-insertion-marker if disorder
2863 while (!NILP (*tailp
)
2864 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
)))
2866 tailp
= &XCONS (*tailp
)->cdr
;
2868 /* If we don't find such an overlay,
2869 or the found one ends before PREV,
2870 or the found one is the last one in the list,
2871 we don't have to fix anything. */
2874 || NILP (XCONS (*tailp
)->cdr
))
2877 right_place
= tailp
;
2878 tailp
= &XCONS (*tailp
)->cdr
;
2880 /* Now, end position of overlays in the list *TAILP should be before
2881 or equal to PREV. In the loop, an overlay which ends at POS is
2882 moved ahead to the place pointed by RIGHT_PLACE. If we found an
2883 overlay which ends before PREV, the remaining overlays are in
2885 while (!NILP (*tailp
))
2887 end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
));
2890 { /* This overlay is disordered. */
2891 Lisp_Object found
= *tailp
;
2893 /* Unlink the found overlay. */
2894 *tailp
= XCONS (found
)->cdr
;
2895 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
2896 XCONS (found
)->cdr
= *right_place
;
2897 /* Link it into the right place. */
2898 *right_place
= found
;
2900 else if (end
== prev
)
2901 tailp
= &XCONS (*tailp
)->cdr
;
2902 else /* No more disordered overlay. */
2907 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
2908 "Return t if OBJECT is an overlay.")
2912 return (OVERLAYP (object
) ? Qt
: Qnil
);
2915 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
2916 "Create a new overlay with range BEG to END in BUFFER.\n\
2917 If omitted, BUFFER defaults to the current buffer.\n\
2918 BEG and END may be integers or markers.\n\
2919 The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\
2920 front delimiter advance when text is inserted there.\n\
2921 The fifth arg REAR-ADVANCE, if non-nil, makes the\n\
2922 rear delimiter advance when text is inserted there.")
2923 (beg
, end
, buffer
, front_advance
, rear_advance
)
2924 Lisp_Object beg
, end
, buffer
;
2925 Lisp_Object front_advance
, rear_advance
;
2927 Lisp_Object overlay
;
2931 XSETBUFFER (buffer
, current_buffer
);
2933 CHECK_BUFFER (buffer
, 2);
2935 && ! EQ (Fmarker_buffer (beg
), buffer
))
2936 error ("Marker points into wrong buffer");
2938 && ! EQ (Fmarker_buffer (end
), buffer
))
2939 error ("Marker points into wrong buffer");
2941 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
2942 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2944 if (XINT (beg
) > XINT (end
))
2947 temp
= beg
; beg
= end
; end
= temp
;
2950 b
= XBUFFER (buffer
);
2952 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
2953 end
= Fset_marker (Fmake_marker (), end
, buffer
);
2955 if (!NILP (front_advance
))
2956 XMARKER (beg
)->insertion_type
= 1;
2957 if (!NILP (rear_advance
))
2958 XMARKER (end
)->insertion_type
= 1;
2960 overlay
= allocate_misc ();
2961 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
2962 XOVERLAY (overlay
)->start
= beg
;
2963 XOVERLAY (overlay
)->end
= end
;
2964 XOVERLAY (overlay
)->plist
= Qnil
;
2966 /* Put the new overlay on the wrong list. */
2967 end
= OVERLAY_END (overlay
);
2968 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
2969 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
2971 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
2973 /* This puts it in the right list, and in the right order. */
2974 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
2976 /* We don't need to redisplay the region covered by the overlay, because
2977 the overlay has no properties at the moment. */
2982 /* Mark a section of BUF as needing redisplay because of overlays changes. */
2985 modify_overlay (buf
, start
, end
)
2995 start
= end
; end
= temp
;
2998 /* If this is a buffer not in the selected window,
2999 we must do other windows. */
3000 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3001 windows_or_buffers_changed
= 1;
3002 /* If it's not current, we can't use beg_unchanged, end_unchanged for it. */
3003 else if (buf
!= current_buffer
)
3004 windows_or_buffers_changed
= 1;
3005 /* If multiple windows show this buffer, we must do other windows. */
3006 else if (buffer_shared
> 1)
3007 windows_or_buffers_changed
= 1;
3010 if (unchanged_modified
== MODIFF
3011 && overlay_unchanged_modified
== OVERLAY_MODIFF
)
3013 beg_unchanged
= start
- BEG
;
3014 end_unchanged
= Z
- end
;
3018 if (Z
- end
< end_unchanged
)
3019 end_unchanged
= Z
- end
;
3020 if (start
- BEG
< beg_unchanged
)
3021 beg_unchanged
= start
- BEG
;
3025 ++BUF_OVERLAY_MODIFF (buf
);
3029 Lisp_Object
Fdelete_overlay ();
3031 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3032 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
3033 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
3034 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
3036 (overlay
, beg
, end
, buffer
)
3037 Lisp_Object overlay
, beg
, end
, buffer
;
3039 struct buffer
*b
, *ob
;
3040 Lisp_Object obuffer
;
3041 int count
= specpdl_ptr
- specpdl
;
3043 CHECK_OVERLAY (overlay
, 0);
3045 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3047 XSETBUFFER (buffer
, current_buffer
);
3048 CHECK_BUFFER (buffer
, 3);
3051 && ! EQ (Fmarker_buffer (beg
), buffer
))
3052 error ("Marker points into wrong buffer");
3054 && ! EQ (Fmarker_buffer (end
), buffer
))
3055 error ("Marker points into wrong buffer");
3057 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3058 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3060 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3061 return Fdelete_overlay (overlay
);
3063 if (XINT (beg
) > XINT (end
))
3066 temp
= beg
; beg
= end
; end
= temp
;
3069 specbind (Qinhibit_quit
, Qt
);
3071 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3072 b
= XBUFFER (buffer
);
3073 ob
= XBUFFER (obuffer
);
3075 /* If the overlay has changed buffers, do a thorough redisplay. */
3076 if (!EQ (buffer
, obuffer
))
3078 /* Redisplay where the overlay was. */
3079 if (!NILP (obuffer
))
3084 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3085 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3087 modify_overlay (ob
, o_beg
, o_end
);
3090 /* Redisplay where the overlay is going to be. */
3091 modify_overlay (b
, XINT (beg
), XINT (end
));
3094 /* Redisplay the area the overlay has just left, or just enclosed. */
3097 int change_beg
, change_end
;
3099 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3100 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3102 if (o_beg
== XINT (beg
))
3103 modify_overlay (b
, o_end
, XINT (end
));
3104 else if (o_end
== XINT (end
))
3105 modify_overlay (b
, o_beg
, XINT (beg
));
3108 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3109 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3110 modify_overlay (b
, o_beg
, o_end
);
3114 if (!NILP (obuffer
))
3116 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3117 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3120 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3121 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3123 /* Put the overlay on the wrong list. */
3124 end
= OVERLAY_END (overlay
);
3125 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3126 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3128 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3130 /* This puts it in the right list, and in the right order. */
3131 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3133 return unbind_to (count
, overlay
);
3136 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3137 "Delete the overlay OVERLAY from its buffer.")
3139 Lisp_Object overlay
;
3143 int count
= specpdl_ptr
- specpdl
;
3145 CHECK_OVERLAY (overlay
, 0);
3147 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3151 b
= XBUFFER (buffer
);
3153 specbind (Qinhibit_quit
, Qt
);
3155 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3156 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3159 marker_position (OVERLAY_START (overlay
)),
3160 marker_position (OVERLAY_END (overlay
)));
3162 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3163 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3165 return unbind_to (count
, Qnil
);
3168 /* Overlay dissection functions. */
3170 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3171 "Return the position at which OVERLAY starts.")
3173 Lisp_Object overlay
;
3175 CHECK_OVERLAY (overlay
, 0);
3177 return (Fmarker_position (OVERLAY_START (overlay
)));
3180 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3181 "Return the position at which OVERLAY ends.")
3183 Lisp_Object overlay
;
3185 CHECK_OVERLAY (overlay
, 0);
3187 return (Fmarker_position (OVERLAY_END (overlay
)));
3190 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3191 "Return the buffer OVERLAY belongs to.")
3193 Lisp_Object overlay
;
3195 CHECK_OVERLAY (overlay
, 0);
3197 return Fmarker_buffer (OVERLAY_START (overlay
));
3200 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3201 "Return a list of the properties on OVERLAY.\n\
3202 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
3205 Lisp_Object overlay
;
3207 CHECK_OVERLAY (overlay
, 0);
3209 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3213 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3214 "Return a list of the overlays that contain position POS.")
3219 Lisp_Object
*overlay_vec
;
3223 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3226 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3228 /* Put all the overlays we want in a vector in overlay_vec.
3229 Store the length in len. */
3230 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3231 (int *) 0, (int *) 0);
3233 /* Make a list of them all. */
3234 result
= Flist (noverlays
, overlay_vec
);
3236 xfree (overlay_vec
);
3240 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3241 "Return a list of the overlays that overlap the region BEG ... END.\n\
3242 Overlap means that at least one character is contained within the overlay\n\
3243 and also contained within the specified region.\n\
3244 Empty overlays are included in the result if they are located at BEG\n\
3245 or between BEG and END.")
3247 Lisp_Object beg
, end
;
3250 Lisp_Object
*overlay_vec
;
3254 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
3255 CHECK_NUMBER_COERCE_MARKER (end
, 0);
3258 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3260 /* Put all the overlays we want in a vector in overlay_vec.
3261 Store the length in len. */
3262 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3263 (int *) 0, (int *) 0);
3265 /* Make a list of them all. */
3266 result
= Flist (noverlays
, overlay_vec
);
3268 xfree (overlay_vec
);
3272 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3274 "Return the next position after POS where an overlay starts or ends.\n\
3275 If there are no more overlay boundaries after POS, return (point-max).")
3281 Lisp_Object
*overlay_vec
;
3285 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3288 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3290 /* Put all the overlays we want in a vector in overlay_vec.
3291 Store the length in len.
3292 endpos gets the position where the next overlay starts. */
3293 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3294 &endpos
, (int *) 0);
3296 /* If any of these overlays ends before endpos,
3297 use its ending point instead. */
3298 for (i
= 0; i
< noverlays
; i
++)
3303 oend
= OVERLAY_END (overlay_vec
[i
]);
3304 oendpos
= OVERLAY_POSITION (oend
);
3305 if (oendpos
< endpos
)
3309 xfree (overlay_vec
);
3310 return make_number (endpos
);
3313 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3314 Sprevious_overlay_change
, 1, 1, 0,
3315 "Return the previous position before POS where an overlay starts or ends.\n\
3316 If there are no more overlay boundaries before POS, return (point-min).")
3322 Lisp_Object
*overlay_vec
;
3327 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3330 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3332 /* At beginning of buffer, we know the answer;
3333 avoid bug subtracting 1 below. */
3334 if (XINT (pos
) == BEGV
)
3337 /* Put all the overlays we want in a vector in overlay_vec.
3338 Store the length in len.
3339 prevpos gets the position of an overlay end. */
3340 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3341 (int *) 0, &prevpos
);
3343 /* If any of these overlays starts after prevpos,
3344 maybe use its starting point instead. */
3345 for (i
= 0; i
< noverlays
; i
++)
3350 ostart
= OVERLAY_START (overlay_vec
[i
]);
3351 ostartpos
= OVERLAY_POSITION (ostart
);
3352 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
3353 prevpos
= ostartpos
;
3356 /* If any overlay ends at pos, consider its starting point too. */
3357 for (tail
= current_buffer
->overlays_before
;
3359 tail
= XCONS (tail
)->cdr
)
3361 Lisp_Object overlay
, ostart
;
3364 overlay
= XCONS (tail
)->car
;
3366 ostart
= OVERLAY_START (overlay
);
3367 ostartpos
= OVERLAY_POSITION (ostart
);
3368 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
3369 prevpos
= ostartpos
;
3372 xfree (overlay_vec
);
3373 return make_number (prevpos
);
3376 /* These functions are for debugging overlays. */
3378 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3379 "Return a pair of lists giving all the overlays of the current buffer.\n\
3380 The car has all the overlays before the overlay center;\n\
3381 the cdr has all the overlays after the overlay center.\n\
3382 Recentering overlays moves overlays between these lists.\n\
3383 The lists you get are copies, so that changing them has no effect.\n\
3384 However, the overlays you get are the real objects that the buffer uses.")
3387 Lisp_Object before
, after
;
3388 before
= current_buffer
->overlays_before
;
3390 before
= Fcopy_sequence (before
);
3391 after
= current_buffer
->overlays_after
;
3393 after
= Fcopy_sequence (after
);
3395 return Fcons (before
, after
);
3398 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3399 "Recenter the overlays of the current buffer around position POS.")
3403 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3405 recenter_overlay_lists (current_buffer
, XINT (pos
));
3409 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3410 "Get the property of overlay OVERLAY with property name PROP.")
3412 Lisp_Object overlay
, prop
;
3414 Lisp_Object plist
, fallback
;
3416 CHECK_OVERLAY (overlay
, 0);
3420 for (plist
= XOVERLAY (overlay
)->plist
;
3421 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
3422 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
3424 if (EQ (XCONS (plist
)->car
, prop
))
3425 return XCONS (XCONS (plist
)->cdr
)->car
;
3426 else if (EQ (XCONS (plist
)->car
, Qcategory
))
3429 tem
= Fcar (Fcdr (plist
));
3431 fallback
= Fget (tem
, prop
);
3438 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3439 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
3440 (overlay
, prop
, value
)
3441 Lisp_Object overlay
, prop
, value
;
3443 Lisp_Object tail
, buffer
;
3446 CHECK_OVERLAY (overlay
, 0);
3448 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3450 for (tail
= XOVERLAY (overlay
)->plist
;
3451 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
3452 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
3453 if (EQ (XCONS (tail
)->car
, prop
))
3455 changed
= !EQ (XCONS (XCONS (tail
)->cdr
)->car
, value
);
3456 XCONS (XCONS (tail
)->cdr
)->car
= value
;
3459 /* It wasn't in the list, so add it to the front. */
3460 changed
= !NILP (value
);
3461 XOVERLAY (overlay
)->plist
3462 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3464 if (! NILP (buffer
))
3467 modify_overlay (XBUFFER (buffer
),
3468 marker_position (OVERLAY_START (overlay
)),
3469 marker_position (OVERLAY_END (overlay
)));
3470 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3471 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3472 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3473 Fdelete_overlay (overlay
);
3478 /* Subroutine of report_overlay_modification. */
3480 /* Lisp vector holding overlay hook functions to call.
3481 Vector elements come in pairs.
3482 Each even-index element is a list of hook functions.
3483 The following odd-index element is the overlay they came from.
3485 Before the buffer change, we fill in this vector
3486 as we call overlay hook functions.
3487 After the buffer change, we get the functions to call from this vector.
3488 This way we always call the same functions before and after the change. */
3489 static Lisp_Object last_overlay_modification_hooks
;
3491 /* Number of elements actually used in last_overlay_modification_hooks. */
3492 static int last_overlay_modification_hooks_used
;
3494 /* Add one functionlist/overlay pair
3495 to the end of last_overlay_modification_hooks. */
3498 add_overlay_mod_hooklist (functionlist
, overlay
)
3499 Lisp_Object functionlist
, overlay
;
3501 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3503 if (last_overlay_modification_hooks_used
== oldsize
)
3506 old
= last_overlay_modification_hooks
;
3507 last_overlay_modification_hooks
3508 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3509 bcopy (XVECTOR (old
)->contents
,
3510 XVECTOR (last_overlay_modification_hooks
)->contents
,
3511 sizeof (Lisp_Object
) * oldsize
);
3513 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3514 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3517 /* Run the modification-hooks of overlays that include
3518 any part of the text in START to END.
3519 If this change is an insertion, also
3520 run the insert-before-hooks of overlay starting at END,
3521 and the insert-after-hooks of overlay ending at START.
3523 This is called both before and after the modification.
3524 AFTER is nonzero when we call after the modification.
3526 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3527 When AFTER is nonzero, they are the start position,
3528 the position after the inserted new text,
3529 and the length of deleted or replaced old text. */
3532 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3533 Lisp_Object start
, end
;
3535 Lisp_Object arg1
, arg2
, arg3
;
3537 Lisp_Object prop
, overlay
, tail
;
3538 /* 1 if this change is an insertion. */
3539 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3541 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3545 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3549 /* Call the functions recorded in last_overlay_modification_hooks
3550 rather than scanning the overlays again.
3551 First copy the vector contents, in case some of these hooks
3552 do subsequent modification of the buffer. */
3553 int size
= last_overlay_modification_hooks_used
;
3554 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3557 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3558 copy
, size
* sizeof (Lisp_Object
));
3560 gcpro1
.nvars
= size
;
3562 for (i
= 0; i
< size
;)
3564 Lisp_Object prop
, overlay
;
3566 overlay
= copy
[i
++];
3567 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3573 /* We are being called before a change.
3574 Scan the overlays to find the functions to call. */
3575 last_overlay_modification_hooks_used
= 0;
3577 for (tail
= current_buffer
->overlays_before
;
3579 tail
= XCONS (tail
)->cdr
)
3581 int startpos
, endpos
;
3582 Lisp_Object ostart
, oend
;
3584 overlay
= XCONS (tail
)->car
;
3586 ostart
= OVERLAY_START (overlay
);
3587 oend
= OVERLAY_END (overlay
);
3588 endpos
= OVERLAY_POSITION (oend
);
3589 if (XFASTINT (start
) > endpos
)
3591 startpos
= OVERLAY_POSITION (ostart
);
3592 if (insertion
&& (XFASTINT (start
) == startpos
3593 || XFASTINT (end
) == startpos
))
3595 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3598 /* Copy TAIL in case the hook recenters the overlay lists. */
3600 tail
= Fcopy_sequence (tail
);
3602 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3605 if (insertion
&& (XFASTINT (start
) == endpos
3606 || XFASTINT (end
) == endpos
))
3608 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3612 tail
= Fcopy_sequence (tail
);
3614 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3617 /* Test for intersecting intervals. This does the right thing
3618 for both insertion and deletion. */
3619 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3621 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3625 tail
= Fcopy_sequence (tail
);
3627 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3633 for (tail
= current_buffer
->overlays_after
;
3635 tail
= XCONS (tail
)->cdr
)
3637 int startpos
, endpos
;
3638 Lisp_Object ostart
, oend
;
3640 overlay
= XCONS (tail
)->car
;
3642 ostart
= OVERLAY_START (overlay
);
3643 oend
= OVERLAY_END (overlay
);
3644 startpos
= OVERLAY_POSITION (ostart
);
3645 endpos
= OVERLAY_POSITION (oend
);
3646 if (XFASTINT (end
) < startpos
)
3648 if (insertion
&& (XFASTINT (start
) == startpos
3649 || XFASTINT (end
) == startpos
))
3651 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3655 tail
= Fcopy_sequence (tail
);
3657 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3660 if (insertion
&& (XFASTINT (start
) == endpos
3661 || XFASTINT (end
) == endpos
))
3663 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3667 tail
= Fcopy_sequence (tail
);
3669 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3672 /* Test for intersecting intervals. This does the right thing
3673 for both insertion and deletion. */
3674 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3676 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3680 tail
= Fcopy_sequence (tail
);
3682 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3691 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
3692 Lisp_Object list
, overlay
;
3694 Lisp_Object arg1
, arg2
, arg3
;
3696 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3698 GCPRO4 (list
, arg1
, arg2
, arg3
);
3700 add_overlay_mod_hooklist (list
, overlay
);
3702 while (!NILP (list
))
3705 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
3707 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
3713 /* Delete any zero-sized overlays at position POS, if the `evaporate'
3716 evaporate_overlays (pos
)
3719 Lisp_Object tail
, overlay
, hit_list
;
3722 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
3723 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
3724 tail
= XCONS (tail
)->cdr
)
3727 overlay
= XCONS (tail
)->car
;
3728 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3731 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
3732 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3733 hit_list
= Fcons (overlay
, hit_list
);
3736 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
3737 tail
= XCONS (tail
)->cdr
)
3740 overlay
= XCONS (tail
)->car
;
3741 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3744 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
3745 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3746 hit_list
= Fcons (overlay
, hit_list
);
3748 for (; CONSP (hit_list
); hit_list
= XCONS (hit_list
)->cdr
)
3749 Fdelete_overlay (XCONS (hit_list
)->car
);
3752 /* Somebody has tried to store a value with an unacceptable type
3753 in the slot with offset OFFSET. */
3756 buffer_slot_type_mismatch (offset
)
3761 sym
= *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
);
3762 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
3764 case Lisp_Int
: type_name
= "integers"; break;
3765 case Lisp_String
: type_name
= "strings"; break;
3766 case Lisp_Symbol
: type_name
= "symbols"; break;
3772 error ("Only %s should be stored in the buffer-local variable %s",
3773 type_name
, XSYMBOL (sym
)->name
->data
);
3778 register Lisp_Object tem
;
3780 buffer_permanent_local_flags
= 0;
3782 /* Make sure all markable slots in buffer_defaults
3783 are initialized reasonably, so mark_buffer won't choke. */
3784 reset_buffer (&buffer_defaults
);
3785 reset_buffer_local_variables (&buffer_defaults
, 1);
3786 reset_buffer (&buffer_local_symbols
);
3787 reset_buffer_local_variables (&buffer_local_symbols
, 1);
3788 /* Prevent GC from getting confused. */
3789 buffer_defaults
.text
= &buffer_defaults
.own_text
;
3790 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
3791 #ifdef USE_TEXT_PROPERTIES
3792 BUF_INTERVALS (&buffer_defaults
) = 0;
3793 BUF_INTERVALS (&buffer_local_symbols
) = 0;
3795 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
3796 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
3798 /* Set up the default values of various buffer slots. */
3799 /* Must do these before making the first buffer! */
3801 /* real setup is done in loaddefs.el */
3802 buffer_defaults
.mode_line_format
= build_string ("%-");
3803 buffer_defaults
.abbrev_mode
= Qnil
;
3804 buffer_defaults
.overwrite_mode
= Qnil
;
3805 buffer_defaults
.case_fold_search
= Qt
;
3806 buffer_defaults
.auto_fill_function
= Qnil
;
3807 buffer_defaults
.selective_display
= Qnil
;
3809 buffer_defaults
.selective_display_ellipses
= Qt
;
3811 buffer_defaults
.abbrev_table
= Qnil
;
3812 buffer_defaults
.display_table
= Qnil
;
3813 buffer_defaults
.undo_list
= Qnil
;
3814 buffer_defaults
.mark_active
= Qnil
;
3815 buffer_defaults
.file_format
= Qnil
;
3816 buffer_defaults
.overlays_before
= Qnil
;
3817 buffer_defaults
.overlays_after
= Qnil
;
3818 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
3820 XSETFASTINT (buffer_defaults
.tab_width
, 8);
3821 buffer_defaults
.truncate_lines
= Qnil
;
3822 buffer_defaults
.ctl_arrow
= Qt
;
3823 buffer_defaults
.direction_reversed
= Qnil
;
3826 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
3828 buffer_defaults
.enable_multibyte_characters
= Qt
;
3829 buffer_defaults
.buffer_file_coding_system
= Qnil
;
3830 XSETFASTINT (buffer_defaults
.fill_column
, 70);
3831 XSETFASTINT (buffer_defaults
.left_margin
, 0);
3832 buffer_defaults
.cache_long_line_scans
= Qnil
;
3833 buffer_defaults
.file_truename
= Qnil
;
3834 XSETFASTINT (buffer_defaults
.display_count
, 0);
3836 /* Assign the local-flags to the slots that have default values.
3837 The local flag is a bit that is used in the buffer
3838 to say that it has its own local value for the slot.
3839 The local flag bits are in the local_var_flags slot of the buffer. */
3841 /* Nothing can work if this isn't true */
3842 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
3844 /* 0 means not a lisp var, -1 means always local, else mask */
3845 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
3846 XSETINT (buffer_local_flags
.filename
, -1);
3847 XSETINT (buffer_local_flags
.directory
, -1);
3848 XSETINT (buffer_local_flags
.backed_up
, -1);
3849 XSETINT (buffer_local_flags
.save_length
, -1);
3850 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
3851 XSETINT (buffer_local_flags
.read_only
, -1);
3852 XSETINT (buffer_local_flags
.major_mode
, -1);
3853 XSETINT (buffer_local_flags
.mode_name
, -1);
3854 XSETINT (buffer_local_flags
.undo_list
, -1);
3855 XSETINT (buffer_local_flags
.mark_active
, -1);
3856 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
3857 XSETINT (buffer_local_flags
.file_truename
, -1);
3858 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
3859 XSETINT (buffer_local_flags
.file_format
, -1);
3860 XSETINT (buffer_local_flags
.display_count
, -1);
3861 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
3863 XSETFASTINT (buffer_local_flags
.mode_line_format
, 1);
3864 XSETFASTINT (buffer_local_flags
.abbrev_mode
, 2);
3865 XSETFASTINT (buffer_local_flags
.overwrite_mode
, 4);
3866 XSETFASTINT (buffer_local_flags
.case_fold_search
, 8);
3867 XSETFASTINT (buffer_local_flags
.auto_fill_function
, 0x10);
3868 XSETFASTINT (buffer_local_flags
.selective_display
, 0x20);
3870 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, 0x40);
3872 XSETFASTINT (buffer_local_flags
.tab_width
, 0x80);
3873 XSETFASTINT (buffer_local_flags
.truncate_lines
, 0x100);
3874 XSETFASTINT (buffer_local_flags
.ctl_arrow
, 0x200);
3875 XSETFASTINT (buffer_local_flags
.fill_column
, 0x400);
3876 XSETFASTINT (buffer_local_flags
.left_margin
, 0x800);
3877 XSETFASTINT (buffer_local_flags
.abbrev_table
, 0x1000);
3878 XSETFASTINT (buffer_local_flags
.display_table
, 0x2000);
3880 XSETFASTINT (buffer_local_flags
.buffer_file_type
, 0x4000);
3881 /* Make this one a permanent local. */
3882 buffer_permanent_local_flags
|= 0x4000;
3884 XSETFASTINT (buffer_local_flags
.syntax_table
, 0x8000);
3885 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, 0x10000);
3886 XSETFASTINT (buffer_local_flags
.category_table
, 0x20000);
3887 XSETFASTINT (buffer_local_flags
.direction_reversed
, 0x40000);
3888 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, 0x80000);
3889 /* Make this one a permanent local. */
3890 buffer_permanent_local_flags
|= 0x80000;
3892 Vbuffer_alist
= Qnil
;
3896 QSFundamental
= build_string ("Fundamental");
3898 Qfundamental_mode
= intern ("fundamental-mode");
3899 buffer_defaults
.major_mode
= Qfundamental_mode
;
3901 Qmode_class
= intern ("mode-class");
3903 Qprotected_field
= intern ("protected-field");
3905 Qpermanent_local
= intern ("permanent-local");
3907 Qkill_buffer_hook
= intern ("kill-buffer-hook");
3909 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
3911 /* super-magic invisible buffer */
3912 Vbuffer_alist
= Qnil
;
3914 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3919 char buf
[MAXPATHLEN
+1];
3921 struct stat dotstat
, pwdstat
;
3925 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3926 if (NILP (buffer_defaults
.enable_multibyte_characters
))
3927 Fset_buffer_multibyte (Qnil
);
3929 /* If PWD is accurate, use it instead of calling getwd. This is faster
3930 when PWD is right, and may avoid a fatal error. */
3931 if ((pwd
= getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd
)
3932 && stat (pwd
, &pwdstat
) == 0
3933 && stat (".", &dotstat
) == 0
3934 && dotstat
.st_ino
== pwdstat
.st_ino
3935 && dotstat
.st_dev
== pwdstat
.st_dev
3936 && strlen (pwd
) < MAXPATHLEN
)
3939 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
3940 fatal ("`getcwd' failed: %s\n", strerror (errno
));
3942 else if (getwd (buf
) == 0)
3943 fatal ("`getwd' failed: %s\n", buf
);
3947 /* Maybe this should really use some standard subroutine
3948 whose definition is filename syntax dependent. */
3950 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
3952 buf
[rc
] = DIRECTORY_SEP
;
3955 #endif /* not VMS */
3957 current_buffer
->directory
= build_string (buf
);
3959 /* Add /: to the front of the name
3960 if it would otherwise be treated as magic. */
3961 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
3963 /* If the default dir is just /, TEMP is non-nil
3964 because of the ange-ftp completion handler.
3965 However, it is not necessary to turn / into /:/.
3966 So avoid doing that. */
3967 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
3968 current_buffer
->directory
3969 = concat2 (build_string ("/:"), current_buffer
->directory
);
3971 temp
= get_minibuffer (0);
3972 XBUFFER (temp
)->directory
= current_buffer
->directory
;
3975 /* initialize the buffer routines */
3978 extern Lisp_Object Qdisabled
;
3980 staticpro (&last_overlay_modification_hooks
);
3981 last_overlay_modification_hooks
3982 = Fmake_vector (make_number (10), Qnil
);
3984 staticpro (&Vbuffer_defaults
);
3985 staticpro (&Vbuffer_local_symbols
);
3986 staticpro (&Qfundamental_mode
);
3987 staticpro (&Qmode_class
);
3988 staticpro (&QSFundamental
);
3989 staticpro (&Vbuffer_alist
);
3990 staticpro (&Qprotected_field
);
3991 staticpro (&Qpermanent_local
);
3992 staticpro (&Qkill_buffer_hook
);
3993 Qoverlayp
= intern ("overlayp");
3994 staticpro (&Qoverlayp
);
3995 Qevaporate
= intern ("evaporate");
3996 staticpro (&Qevaporate
);
3997 Qmodification_hooks
= intern ("modification-hooks");
3998 staticpro (&Qmodification_hooks
);
3999 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
4000 staticpro (&Qinsert_in_front_hooks
);
4001 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
4002 staticpro (&Qinsert_behind_hooks
);
4003 Qget_file_buffer
= intern ("get-file-buffer");
4004 staticpro (&Qget_file_buffer
);
4005 Qpriority
= intern ("priority");
4006 staticpro (&Qpriority
);
4007 Qwindow
= intern ("window");
4008 staticpro (&Qwindow
);
4009 Qbefore_string
= intern ("before-string");
4010 staticpro (&Qbefore_string
);
4011 Qafter_string
= intern ("after-string");
4012 staticpro (&Qafter_string
);
4013 Qfirst_change_hook
= intern ("first-change-hook");
4014 staticpro (&Qfirst_change_hook
);
4015 Qbefore_change_functions
= intern ("before-change-functions");
4016 staticpro (&Qbefore_change_functions
);
4017 Qafter_change_functions
= intern ("after-change-functions");
4018 staticpro (&Qafter_change_functions
);
4020 Fput (Qprotected_field
, Qerror_conditions
,
4021 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
4022 Fput (Qprotected_field
, Qerror_message
,
4023 build_string ("Attempt to modify a protected field"));
4025 /* All these use DEFVAR_LISP_NOPRO because the slots in
4026 buffer_defaults will all be marked via Vbuffer_defaults. */
4028 DEFVAR_LISP_NOPRO ("default-mode-line-format",
4029 &buffer_defaults
.mode_line_format
,
4030 "Default value of `mode-line-format' for buffers that don't override it.\n\
4031 This is the same as (default-value 'mode-line-format).");
4033 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
4034 &buffer_defaults
.abbrev_mode
,
4035 "Default value of `abbrev-mode' for buffers that do not override it.\n\
4036 This is the same as (default-value 'abbrev-mode).");
4038 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
4039 &buffer_defaults
.ctl_arrow
,
4040 "Default value of `ctl-arrow' for buffers that do not override it.\n\
4041 This is the same as (default-value 'ctl-arrow).");
4043 DEFVAR_LISP_NOPRO ("default-direction-reversed",
4044 &buffer_defaults
.direction_reversed
,
4045 "Default value of `direction_reversed' for buffers that do not override it.\n\
4046 This is the same as (default-value 'direction-reversed).");
4048 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
4049 &buffer_defaults
.enable_multibyte_characters
,
4050 "Default value of `enable-multibyte-characters' for buffers not overriding it.\n\
4051 This is the same as (default-value 'enable-multibyte-characters).");
4053 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
4054 &buffer_defaults
.buffer_file_coding_system
,
4055 "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\
4056 This is the same as (default-value 'buffer-file-coding-system).");
4058 DEFVAR_LISP_NOPRO ("default-truncate-lines",
4059 &buffer_defaults
.truncate_lines
,
4060 "Default value of `truncate-lines' for buffers that do not override it.\n\
4061 This is the same as (default-value 'truncate-lines).");
4063 DEFVAR_LISP_NOPRO ("default-fill-column",
4064 &buffer_defaults
.fill_column
,
4065 "Default value of `fill-column' for buffers that do not override it.\n\
4066 This is the same as (default-value 'fill-column).");
4068 DEFVAR_LISP_NOPRO ("default-left-margin",
4069 &buffer_defaults
.left_margin
,
4070 "Default value of `left-margin' for buffers that do not override it.\n\
4071 This is the same as (default-value 'left-margin).");
4073 DEFVAR_LISP_NOPRO ("default-tab-width",
4074 &buffer_defaults
.tab_width
,
4075 "Default value of `tab-width' for buffers that do not override it.\n\
4076 This is the same as (default-value 'tab-width).");
4078 DEFVAR_LISP_NOPRO ("default-case-fold-search",
4079 &buffer_defaults
.case_fold_search
,
4080 "Default value of `case-fold-search' for buffers that don't override it.\n\
4081 This is the same as (default-value 'case-fold-search).");
4084 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
4085 &buffer_defaults
.buffer_file_type
,
4086 "Default file type for buffers that do not override it.\n\
4087 This is the same as (default-value 'buffer-file-type).\n\
4088 The file type is nil for text, t for binary.");
4091 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
4094 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
4095 But make-docfile finds it!
4096 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
4098 "Template for displaying mode line for current buffer.\n\
4099 Each buffer has its own value of this variable.\n\
4100 Value may be a string, a symbol or a list or cons cell.\n\
4101 For a symbol, its value is used (but it is ignored if t or nil).\n\
4102 A string appearing directly as the value of a symbol is processed verbatim\n\
4103 in that the %-constructs below are not recognized.\n\
4104 For a list whose car is a symbol, the symbol's value is taken,\n\
4105 and if that is non-nil, the cadr of the list is processed recursively.\n\
4106 Otherwise, the caddr of the list (if there is one) is processed.\n\
4107 For a list whose car is a string or list, each element is processed\n\
4108 recursively and the results are effectively concatenated.\n\
4109 For a list whose car is an integer, the cdr of the list is processed\n\
4110 and padded (if the number is positive) or truncated (if negative)\n\
4111 to the width specified by that number.\n\
4112 A string is printed verbatim in the mode line except for %-constructs:\n\
4113 (%-constructs are allowed when the string is the entire mode-line-format\n\
4114 or when it is found in a cons-cell or a list)\n\
4115 %b -- print buffer name. %f -- print visited file name.\n\
4116 %F -- print frame name.\n\
4117 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
4118 % means buffer is read-only and * means it is modified.\n\
4119 For a modified read-only buffer, %* gives % and %+ gives *.\n\
4120 %s -- print process status. %l -- print the current line number.\n\
4121 %c -- print the current column number (this makes editing slower).\n\
4122 To make the column number update correctly in all cases,\n\
4123 `column-number-mode' must be non-nil.\n\
4124 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
4125 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
4126 or print Bottom or All.\n\
4127 %n -- print Narrow if appropriate.\n\
4128 %t -- print T if file is text, B if binary.\n\
4129 %[ -- print one [ for each recursive editing level. %] similar.\n\
4130 %% -- print %. %- -- print infinitely many dashes.\n\
4131 Decimal digits after the % specify field width to which to pad.");
4134 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
4135 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
4136 nil here means use current buffer's major mode.");
4138 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
4139 make_number (Lisp_Symbol
),
4140 "Symbol for current buffer's major mode.");
4142 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
4143 make_number (Lisp_String
),
4144 "Pretty name of current buffer's major mode (a string).");
4146 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
4147 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
4148 Automatically becomes buffer-local when set in any fashion.");
4150 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
4152 "*Non-nil if searches should ignore case.\n\
4153 Automatically becomes buffer-local when set in any fashion.");
4155 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
4156 make_number (Lisp_Int
),
4157 "*Column beyond which automatic line-wrapping should happen.\n\
4158 Automatically becomes buffer-local when set in any fashion.");
4160 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
4161 make_number (Lisp_Int
),
4162 "*Column for the default indent-line-function to indent to.\n\
4163 Linefeed indents to this column in Fundamental mode.\n\
4164 Automatically becomes buffer-local when set in any fashion.");
4166 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
4167 make_number (Lisp_Int
),
4168 "*Distance between tab stops (for display of tab characters), in columns.\n\
4169 Automatically becomes buffer-local when set in any fashion.");
4171 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
4172 "*Non-nil means display control chars with uparrow.\n\
4173 A value of nil means use backslash and octal digits.\n\
4174 Automatically becomes buffer-local when set in any fashion.\n\
4175 This variable does not apply to characters whose display is specified\n\
4176 in the current display table (if there is one).");
4178 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
4179 ¤t_buffer
->enable_multibyte_characters
,
4181 "*Non-nil means the buffer contents are regarded as multi-byte form\n\
4182 of characters, not a binary code. This affects the display, file I/O,\n\
4183 and behaviors of various editing commands.");
4185 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
4186 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
4187 "Coding system to be used for encoding the buffer contents on saving.\n\
4188 If it is nil, the buffer is saved without any code conversion unless\n\
4189 some coding system is specified in file-coding-system-alist\n\
4190 for the buffer file.\n\
4192 This variable is never applied to a way of decoding\n\
4193 a file while reading it.");
4195 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
4197 "*Non-nil means lines in the buffer are displayed right to left.");
4199 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
4200 "*Non-nil means do not display continuation lines;\n\
4201 give each line of text one screen line.\n\
4202 Automatically becomes buffer-local when set in any fashion.\n\
4204 Note that this is overridden by the variable\n\
4205 `truncate-partial-width-windows' if that variable is non-nil\n\
4206 and this buffer is not full-frame width.");
4209 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
4211 "Non-nil if the visited file is a binary file.\n\
4212 This variable is meaningful on MS-DOG and Windows NT.\n\
4213 On those systems, it is automatically local in every buffer.\n\
4214 On other systems, this variable is normally always nil.");
4217 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
4218 make_number (Lisp_String
),
4219 "Name of default directory of current buffer. Should end with slash.\n\
4220 Each buffer has its own value of this variable.");
4222 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
4224 "Function called (if non-nil) to perform auto-fill.\n\
4225 It is called after self-inserting a space or newline.\n\
4226 Each buffer has its own value of this variable.\n\
4227 NOTE: This variable is not a hook;\n\
4228 its value may not be a list of functions.");
4230 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
4231 make_number (Lisp_String
),
4232 "Name of file visited in current buffer, or nil if not visiting a file.\n\
4233 Each buffer has its own value of this variable.");
4235 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
4236 make_number (Lisp_String
),
4237 "Abbreviated truename of file visited in current buffer, or nil if none.\n\
4238 The truename of a file is calculated by `file-truename'\n\
4239 and then abbreviated with `abbreviate-file-name'.\n\
4240 Each buffer has its own value of this variable.");
4242 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
4243 ¤t_buffer
->auto_save_file_name
,
4244 make_number (Lisp_String
),
4245 "Name of file for auto-saving current buffer,\n\
4246 or nil if buffer should not be auto-saved.\n\
4247 Each buffer has its own value of this variable.");
4249 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
4250 "Non-nil if this buffer is read-only.\n\
4251 Each buffer has its own value of this variable.");
4253 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
4254 "Non-nil if this buffer's file has been backed up.\n\
4255 Backing up is done before the first time the file is saved.\n\
4256 Each buffer has its own value of this variable.");
4258 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
4259 make_number (Lisp_Int
),
4260 "Length of current buffer when last read in, saved or auto-saved.\n\
4262 Each buffer has its own value of this variable.");
4264 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
4266 "Non-nil enables selective display:\n\
4267 Integer N as value means display only lines\n\
4268 that start with less than n columns of space.\n\
4269 A value of t means, after a ^M, all the rest of the line is invisible.\n\
4270 Then ^M's in the file are written into files as newlines.\n\n\
4271 Automatically becomes buffer-local when set in any fashion.");
4274 DEFVAR_PER_BUFFER ("selective-display-ellipses",
4275 ¤t_buffer
->selective_display_ellipses
,
4277 "t means display ... on previous line when a line is invisible.\n\
4278 Automatically becomes buffer-local when set in any fashion.");
4281 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
4282 "Non-nil if self-insertion should replace existing text.\n\
4283 The value should be one of `overwrite-mode-textual',\n\
4284 `overwrite-mode-binary', or nil.\n\
4285 If it is `overwrite-mode-textual', self-insertion still\n\
4286 inserts at the end of a line, and inserts when point is before a tab,\n\
4287 until the tab is filled in.\n\
4288 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
4289 Automatically becomes buffer-local when set in any fashion.");
4291 #if 0 /* The doc string is too long for some compilers,
4292 but make-docfile can find it in this comment. */
4293 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4295 "Display table that controls display of the contents of current buffer.\n\
4296 Automatically becomes buffer-local when set in any fashion.\n\
4297 The display table is a char-table created with `make-display-table'.\n\
4298 The ordinary char-table elements control how to display each possible text\n\
4299 character. Each value should be a vector of characters or nil;\n\
4300 nil means display the character in the default fashion.\n\
4301 There are six extra slots to control the display of\n\
4302 the end of a truncated screen line (extra-slot 0, a single character);\n\
4303 the end of a continued line (extra-slot 1, a single character);\n\
4304 the escape character used to display character codes in octal\n\
4305 (extra-slot 2, a single character);\n\
4306 the character used as an arrow for control characters (extra-slot 3,\n\
4307 a single character);\n\
4308 the decoration indicating the presence of invisible lines (extra-slot 4,\n\
4309 a vector of characters);\n\
4310 the character used to draw the border between side-by-side windows\n\
4311 (extra-slot 5, a single character).\n\
4312 See also the functions `display-table-slot' and `set-display-table-slot'.\n\
4313 If this variable is nil, the value of `standard-display-table' is used.\n\
4314 Each window can have its own, overriding display table.");
4316 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4319 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
4322 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
4323 "If non-nil, a function to call before each text change (obsolete).\n\
4324 Two arguments are passed to the function: the positions of\n\
4325 the beginning and end of the range of old text to be changed.\n\
4326 \(For an insertion, the beginning and end are at the same place.)\n\
4327 No information is given about the length of the text after the change.\n\
4329 Buffer changes made while executing the `before-change-function'\n\
4330 don't call any before-change or after-change functions.\n\
4331 That's because these variables are temporarily set to nil.\n\
4332 As a result, a hook function cannot straightforwardly alter the value of\n\
4333 these variables. See the Emacs Lisp manual for a way of\n\
4334 accomplishing an equivalent result by using other variables.\n\n\
4335 This variable is obsolete; use `before-change-functions' instead.");
4336 Vbefore_change_function
= Qnil
;
4338 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
4339 "If non-nil, a Function to call after each text change (obsolete).\n\
4340 Three arguments are passed to the function: the positions of\n\
4341 the beginning and end of the range of changed text,\n\
4342 and the length of the pre-change text replaced by that range.\n\
4343 \(For an insertion, the pre-change length is zero;\n\
4344 for a deletion, that length is the number of bytes deleted,\n\
4345 and the post-change beginning and end are at the same place.)\n\
4347 Buffer changes made while executing the `after-change-function'\n\
4348 don't call any before-change or after-change functions.\n\
4349 That's because these variables are temporarily set to nil.\n\
4350 As a result, a hook function cannot straightforwardly alter the value of\n\
4351 these variables. See the Emacs Lisp manual for a way of\n\
4352 accomplishing an equivalent result by using other variables.\n\n\
4353 This variable is obsolete; use `after-change-functions' instead.");
4354 Vafter_change_function
= Qnil
;
4356 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
4357 "List of functions to call before each text change.\n\
4358 Two arguments are passed to each function: the positions of\n\
4359 the beginning and end of the range of old text to be changed.\n\
4360 \(For an insertion, the beginning and end are at the same place.)\n\
4361 No information is given about the length of the text after the change.\n\
4363 Buffer changes made while executing the `before-change-functions'\n\
4364 don't call any before-change or after-change functions.\n\
4365 That's because these variables are temporarily set to nil.\n\
4366 As a result, a hook function cannot straightforwardly alter the value of\n\
4367 these variables. See the Emacs Lisp manual for a way of\n\
4368 accomplishing an equivalent result by using other variables.");
4369 Vbefore_change_functions
= Qnil
;
4371 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
4372 "List of function to call after each text change.\n\
4373 Three arguments are passed to each function: the positions of\n\
4374 the beginning and end of the range of changed text,\n\
4375 and the length in bytes of the pre-change text replaced by that range.\n\
4376 \(For an insertion, the pre-change length is zero;\n\
4377 for a deletion, that length is the number of bytes deleted,\n\
4378 and the post-change beginning and end are at the same place.)\n\
4380 Buffer changes made while executing the `after-change-functions'\n\
4381 don't call any before-change or after-change functions.\n\
4382 That's because these variables are temporarily set to nil.\n\
4383 As a result, a hook function cannot straightforwardly alter the value of\n\
4384 these variables. See the Emacs Lisp manual for a way of\n\
4385 accomplishing an equivalent result by using other variables.");
4387 Vafter_change_functions
= Qnil
;
4389 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
4390 "A list of functions to call before changing a buffer which is unmodified.\n\
4391 The functions are run using the `run-hooks' function.");
4392 Vfirst_change_hook
= Qnil
;
4394 #if 0 /* The doc string is too long for some compilers,
4395 but make-docfile can find it in this comment. */
4396 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4397 "List of undo entries in current buffer.\n\
4398 Recent changes come first; older changes follow newer.\n\
4400 An entry (BEG . END) represents an insertion which begins at\n\
4401 position BEG and ends at position END.\n\
4403 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
4404 from (abs POSITION). If POSITION is positive, point was at the front\n\
4405 of the text being deleted; if negative, point was at the end.\n\
4407 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
4408 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
4409 of the visited file's modification time, as of that time. If the\n\
4410 modification time of the most recent save is different, this entry is\n\
4413 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
4414 was modified between BEG and END. PROPERTY is the property name,\n\
4415 and VALUE is the old value.\n\
4417 An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
4418 was adjusted in position by the offset DISTANCE (an integer).\n\
4420 An entry of the form POSITION indicates that point was at the buffer\n\
4421 location given by the integer. Undoing an entry of this form places\n\
4422 point at POSITION.\n\
4424 nil marks undo boundaries. The undo command treats the changes\n\
4425 between two undo boundaries as a single step to be undone.\n\
4427 If the value of the variable is t, undo information is not recorded.");
4429 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4432 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
4433 "Non-nil means the mark and region are currently active in this buffer.\n\
4434 Automatically local in all buffers.");
4436 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
4437 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
4438 This variable is buffer-local, in all buffers.\n\
4440 Normally, the line-motion functions work by scanning the buffer for\n\
4441 newlines. Columnar operations (like move-to-column and\n\
4442 compute-motion) also work by scanning the buffer, summing character\n\
4443 widths as they go. This works well for ordinary text, but if the\n\
4444 buffer's lines are very long (say, more than 500 characters), these\n\
4445 motion functions will take longer to execute. Emacs may also take\n\
4446 longer to update the display.\n\
4448 If cache-long-line-scans is non-nil, these motion functions cache the\n\
4449 results of their scans, and consult the cache to avoid rescanning\n\
4450 regions of the buffer until the text is modified. The caches are most\n\
4451 beneficial when they prevent the most searching---that is, when the\n\
4452 buffer contains long lines and large regions of characters with the\n\
4453 same, fixed screen width.\n\
4455 When cache-long-line-scans is non-nil, processing short lines will\n\
4456 become slightly slower (because of the overhead of consulting the\n\
4457 cache), and the caches will use memory roughly proportional to the\n\
4458 number of newlines and characters whose screen width varies.\n\
4460 The caches require no explicit maintenance; their accuracy is\n\
4461 maintained internally by the Emacs primitives. Enabling or disabling\n\
4462 the cache should not affect the behavior of any of the motion\n\
4463 functions; it should only affect their performance.");
4465 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
4466 "Value of point before the last series of scroll operations, or nil.");
4468 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
4469 "List of formats to use when saving this buffer.\n\
4470 Formats are defined by `format-alist'. This variable is\n\
4471 set when a file is visited. Automatically local in all buffers.");
4473 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
4474 ¤t_buffer
->invisibility_spec
, Qnil
,
4475 "Invisibility spec of this buffer.\n\
4476 The default is t, which means that text is invisible\n\
4477 if it has a non-nil `invisible' property.\n\
4478 If the value is a list, a text character is invisible if its `invisible'\n\
4479 property is an element in that list.\n\
4480 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
4481 then characters with property value PROP are invisible,\n\
4482 and they have an ellipsis as well if ELLIPSIS is non-nil.");
4484 DEFVAR_PER_BUFFER ("buffer-display-count",
4485 ¤t_buffer
->display_count
, Qnil
,
4486 "A number incremented each time the buffer is displayed in a window.");
4488 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
4489 "*Non-nil means deactivate the mark when the buffer contents change.\n\
4490 Non-nil also enables highlighting of the region whenever the mark is active.\n\
4491 The variable `highlight-nonselected-windows' controls whether to highlight\n\
4492 all windows or just the selected window.");
4493 Vtransient_mark_mode
= Qnil
;
4495 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
4496 "*Non-nil means disregard read-only status of buffers or characters.\n\
4497 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
4498 text properties. If the value is a list, disregard `buffer-read-only'\n\
4499 and disregard a `read-only' text property if the property value\n\
4500 is a member of the list.");
4501 Vinhibit_read_only
= Qnil
;
4503 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
4504 "List of functions called with no args to query before killing a buffer.");
4505 Vkill_buffer_query_functions
= Qnil
;
4507 defsubr (&Sbuffer_live_p
);
4508 defsubr (&Sbuffer_list
);
4509 defsubr (&Sget_buffer
);
4510 defsubr (&Sget_file_buffer
);
4511 defsubr (&Sget_buffer_create
);
4512 defsubr (&Smake_indirect_buffer
);
4513 defsubr (&Sgenerate_new_buffer_name
);
4514 defsubr (&Sbuffer_name
);
4515 /*defsubr (&Sbuffer_number);*/
4516 defsubr (&Sbuffer_file_name
);
4517 defsubr (&Sbuffer_base_buffer
);
4518 defsubr (&Sbuffer_local_variables
);
4519 defsubr (&Sbuffer_modified_p
);
4520 defsubr (&Sset_buffer_modified_p
);
4521 defsubr (&Sbuffer_modified_tick
);
4522 defsubr (&Srename_buffer
);
4523 defsubr (&Sother_buffer
);
4524 defsubr (&Sbuffer_disable_undo
);
4525 defsubr (&Sbuffer_enable_undo
);
4526 defsubr (&Skill_buffer
);
4527 defsubr (&Sset_buffer_major_mode
);
4528 defsubr (&Sswitch_to_buffer
);
4529 defsubr (&Spop_to_buffer
);
4530 defsubr (&Scurrent_buffer
);
4531 defsubr (&Sset_buffer
);
4532 defsubr (&Sbarf_if_buffer_read_only
);
4533 defsubr (&Sbury_buffer
);
4534 defsubr (&Serase_buffer
);
4535 defsubr (&Sset_buffer_multibyte
);
4536 defsubr (&Skill_all_local_variables
);
4538 defsubr (&Soverlayp
);
4539 defsubr (&Smake_overlay
);
4540 defsubr (&Sdelete_overlay
);
4541 defsubr (&Smove_overlay
);
4542 defsubr (&Soverlay_start
);
4543 defsubr (&Soverlay_end
);
4544 defsubr (&Soverlay_buffer
);
4545 defsubr (&Soverlay_properties
);
4546 defsubr (&Soverlays_at
);
4547 defsubr (&Soverlays_in
);
4548 defsubr (&Snext_overlay_change
);
4549 defsubr (&Sprevious_overlay_change
);
4550 defsubr (&Soverlay_recenter
);
4551 defsubr (&Soverlay_lists
);
4552 defsubr (&Soverlay_get
);
4553 defsubr (&Soverlay_put
);
4558 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
4559 initial_define_key (control_x_map
, 'k', "kill-buffer");
4561 /* This must not be in syms_of_buffer, because Qdisabled is not
4562 initialized when that function gets called. */
4563 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);