1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #include <sys/types.h>
24 #include <sys/param.h>
27 /* in 4.1, param.h fails to define this. */
28 #define MAXPATHLEN 1024
29 #endif /* not MAXPATHLEN */
33 #include "intervals.h"
38 #include "blockinput.h"
40 struct buffer
*current_buffer
; /* the current buffer */
42 /* First buffer in chain of all buffers (in reverse order of creation).
43 Threaded through ->next. */
45 struct buffer
*all_buffers
;
47 /* This structure holds the default values of the buffer-local variables
48 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
49 The default value occupies the same slot in this structure
50 as an individual buffer's value occupies in that buffer.
51 Setting the default value also goes through the alist of buffers
52 and stores into each buffer that does not say it has a local value. */
54 struct buffer buffer_defaults
;
56 /* A Lisp_Object pointer to the above, used for staticpro */
58 static Lisp_Object Vbuffer_defaults
;
60 /* This structure marks which slots in a buffer have corresponding
61 default values in buffer_defaults.
62 Each such slot has a nonzero value in this structure.
63 The value has only one nonzero bit.
65 When a buffer has its own local value for a slot,
66 the bit for that slot (found in the same slot in this structure)
67 is turned on in the buffer's local_var_flags slot.
69 If a slot in this structure is -1, then even though there may
70 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
71 and the corresponding slot in buffer_defaults is not used.
73 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
74 but there is a default value which is copied into each buffer.
76 If a slot in this structure is negative, 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 in this structure corresponding to a DEFVAR_PER_BUFFER is
81 zero, that is a bug */
83 struct buffer buffer_local_flags
;
85 /* This structure holds the names of symbols whose values may be
86 buffer-local. It is indexed and accessed in the same way as the above. */
88 struct buffer buffer_local_symbols
;
89 /* A Lisp_Object pointer to the above, used for staticpro */
90 static Lisp_Object Vbuffer_local_symbols
;
92 /* This structure holds the required types for the values in the
93 buffer-local slots. If a slot contains Qnil, then the
94 corresponding buffer slot may contain a value of any type. If a
95 slot contains an integer, then prospective values' tags must be
96 equal to that integer. When a tag does not match, the function
97 buffer_slot_type_mismatch will signal an error. */
98 struct buffer buffer_local_types
;
100 Lisp_Object
Fset_buffer ();
101 void set_buffer_internal ();
102 static void call_overlay_mod_hooks ();
104 /* Alist of all buffer names vs the buffers. */
105 /* This used to be a variable, but is no longer,
106 to prevent lossage due to user rplac'ing this alist or its elements. */
107 Lisp_Object Vbuffer_alist
;
109 /* Functions to call before and after each text change. */
110 Lisp_Object Vbefore_change_function
;
111 Lisp_Object Vafter_change_function
;
113 Lisp_Object Vtransient_mark_mode
;
115 /* t means ignore all read-only text properties.
116 A list means ignore such a property if its value is a member of the list.
117 Any non-nil value means ignore buffer-read-only. */
118 Lisp_Object Vinhibit_read_only
;
120 /* List of functions to call that can query about killing a buffer.
121 If any of these functions returns nil, we don't kill it. */
122 Lisp_Object Vkill_buffer_query_functions
;
124 /* List of functions to call before changing an unmodified buffer. */
125 Lisp_Object Vfirst_change_hook
;
126 Lisp_Object Qfirst_change_hook
;
128 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
130 Lisp_Object Qprotected_field
;
132 Lisp_Object QSFundamental
; /* A string "Fundamental" */
134 Lisp_Object Qkill_buffer_hook
;
136 Lisp_Object Qget_file_buffer
;
138 Lisp_Object Qoverlayp
;
140 Lisp_Object Qpriority
, Qwindow
;
142 Lisp_Object Qmodification_hooks
;
143 Lisp_Object Qinsert_in_front_hooks
;
144 Lisp_Object Qinsert_behind_hooks
;
146 /* For debugging; temporary. See set_buffer_internal. */
147 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
150 Lisp_Object Qbuffer_file_type
;
156 if (XTYPE (spec
) == Lisp_String
)
157 error ("No buffer named %s", XSTRING (spec
)->data
);
158 error ("Invalid buffer argument");
161 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 0, 0,
162 "Return a list of all existing live buffers.")
165 return Fmapcar (Qcdr
, Vbuffer_alist
);
168 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
169 "Return the buffer named NAME (a string).\n\
170 If there is no live buffer named NAME, return nil.\n\
171 NAME may also be a buffer; if so, the value is that buffer.")
173 register Lisp_Object name
;
175 if (XTYPE (name
) == Lisp_Buffer
)
177 CHECK_STRING (name
, 0);
179 return Fcdr (Fassoc (name
, Vbuffer_alist
));
182 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
183 "Return the buffer visiting file FILENAME (a string).\n\
184 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
185 If there is no such live buffer, return nil.")
187 register Lisp_Object filename
;
189 register Lisp_Object tail
, buf
, tem
;
192 CHECK_STRING (filename
, 0);
193 filename
= Fexpand_file_name (filename
, Qnil
);
195 /* If the file name has special constructs in it,
196 call the corresponding file handler. */
197 handler
= Ffind_file_name_handler (filename
);
199 return call2 (handler
, Qget_file_buffer
, filename
);
201 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
203 buf
= Fcdr (XCONS (tail
)->car
);
204 if (XTYPE (buf
) != Lisp_Buffer
) continue;
205 if (XTYPE (XBUFFER (buf
)->filename
) != Lisp_String
) continue;
206 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
213 /* Incremented for each buffer created, to assign the buffer number. */
216 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
217 "Return the buffer named NAME, or create such a buffer and return it.\n\
218 A new buffer is created if there is no live buffer named NAME.\n\
219 If NAME starts with a space, the new buffer does not keep undo information.\n\
220 If NAME is a buffer instead of a string, then it is the value returned.\n\
221 The value is never nil.")
223 register Lisp_Object name
;
225 register Lisp_Object buf
, function
, tem
;
226 int count
= specpdl_ptr
- specpdl
;
227 register struct buffer
*b
;
229 buf
= Fget_buffer (name
);
233 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
235 BUF_GAP_SIZE (b
) = 20;
237 BUFFER_ALLOC (BUF_BEG_ADDR (b
), BUF_GAP_SIZE (b
));
239 if (! BUF_BEG_ADDR (b
))
249 /* Put this on the chain of all buffers including killed ones. */
250 b
->next
= all_buffers
;
253 b
->mark
= Fmake_marker ();
254 /*b->number = make_number (++buffer_count);*/
256 if (XSTRING (name
)->data
[0] != ' ')
263 /* Put this in the alist of all live buffers. */
264 XSET (buf
, Lisp_Buffer
, b
);
265 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
267 b
->mark
= Fmake_marker ();
271 function
= buffer_defaults
.major_mode
;
274 tem
= Fget (current_buffer
->major_mode
, Qmode_class
);
276 function
= current_buffer
->major_mode
;
279 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
282 /* To select a nonfundamental mode,
283 select the buffer temporarily and then call the mode function. */
285 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
290 return unbind_to (count
, buf
);
293 /* Reinitialize everything about a buffer except its name and contents. */
297 register struct buffer
*b
;
300 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
302 b
->save_modified
= 1;
303 XFASTINT (b
->save_length
) = 0;
304 b
->last_window_start
= 1;
306 b
->auto_save_modified
= 0;
307 b
->auto_save_file_name
= Qnil
;
309 b
->overlays_before
= Qnil
;
310 b
->overlays_after
= Qnil
;
311 XFASTINT (b
->overlay_center
) = 1;
312 b
->mark_active
= Qnil
;
314 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
315 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
317 reset_buffer_local_variables(b
);
320 reset_buffer_local_variables (b
)
321 register struct buffer
*b
;
325 /* Reset the major mode to Fundamental, together with all the
326 things that depend on the major mode.
327 default-major-mode is handled at a higher level.
328 We ignore it here. */
329 b
->major_mode
= Qfundamental_mode
;
331 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
332 b
->mode_name
= QSFundamental
;
333 b
->minor_modes
= Qnil
;
334 b
->downcase_table
= Vascii_downcase_table
;
335 b
->upcase_table
= Vascii_upcase_table
;
336 b
->case_canon_table
= Vascii_downcase_table
;
337 b
->case_eqv_table
= Vascii_upcase_table
;
339 b
->sort_table
= XSTRING (Vascii_sort_table
);
340 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
343 /* Reset all per-buffer variables to their defaults. */
344 b
->local_var_alist
= Qnil
;
345 b
->local_var_flags
= 0;
347 /* For each slot that has a default value,
348 copy that into the slot. */
350 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
351 offset
< sizeof (struct buffer
);
352 offset
+= sizeof (Lisp_Object
)) /* sizeof int == sizeof Lisp_Object */
353 if (*(int *)(offset
+ (char *) &buffer_local_flags
) > 0
354 || *(int *)(offset
+ (char *) &buffer_local_flags
) == -2)
355 *(Lisp_Object
*)(offset
+ (char *)b
) =
356 *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
359 /* We split this away from generate-new-buffer, because rename-buffer
360 and set-visited-file-name ought to be able to use this to really
361 rename the buffer properly. */
363 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
365 "Return a string that is the name of no existing buffer based on NAME.\n\
366 If there is no live buffer named NAME, then return NAME.\n\
367 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
368 until an unused name is found, and then return that name.\n\
369 Optional second argument IGNORE specifies a name that is okay to use\n\
370 \(if it is in the sequence to be tried)\n\
371 even if a buffer with that name exists.")
373 register Lisp_Object name
, ignore
;
375 register Lisp_Object gentemp
, tem
;
379 CHECK_STRING (name
, 0);
381 tem
= Fget_buffer (name
);
388 sprintf (number
, "<%d>", ++count
);
389 gentemp
= concat2 (name
, build_string (number
));
390 tem
= Fstring_equal (gentemp
, ignore
);
393 tem
= Fget_buffer (gentemp
);
400 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
401 "Return the name of BUFFER, as a string.\n\
402 With no argument or nil as argument, return the name of the current buffer.")
404 register Lisp_Object buffer
;
407 return current_buffer
->name
;
408 CHECK_BUFFER (buffer
, 0);
409 return XBUFFER (buffer
)->name
;
412 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
413 "Return name of file BUFFER is visiting, or nil if none.\n\
414 No argument or nil as argument means use the current buffer.")
416 register Lisp_Object buffer
;
419 return current_buffer
->filename
;
420 CHECK_BUFFER (buffer
, 0);
421 return XBUFFER (buffer
)->filename
;
424 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
425 Sbuffer_local_variables
, 0, 1, 0,
426 "Return an alist of variables that are buffer-local in BUFFER.\n\
427 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
428 For a symbol that is locally unbound, just the symbol appears in the value.\n\
429 Note that storing new VALUEs in these elements doesn't change the variables.\n\
430 No argument or nil as argument means use current buffer as BUFFER.")
432 register Lisp_Object buffer
;
434 register struct buffer
*buf
;
435 register Lisp_Object result
;
438 buf
= current_buffer
;
441 CHECK_BUFFER (buffer
, 0);
442 buf
= XBUFFER (buffer
);
448 /* Reference each variable in the alist in our current buffer.
449 If inquiring about the current buffer, this gets the current values,
450 so store them into the alist so the alist is up to date.
451 If inquiring about some other buffer, this swaps out any values
452 for that buffer, making the alist up to date automatically. */
453 register Lisp_Object tail
;
454 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
456 Lisp_Object val
, elt
;
458 elt
= XCONS (tail
)->car
;
460 if (buf
== current_buffer
)
461 val
= find_symbol_value (XCONS (elt
)->car
);
463 val
= XCONS (elt
)->cdr
;
465 /* If symbol is unbound, put just the symbol in the list. */
466 if (EQ (val
, Qunbound
))
467 result
= Fcons (XCONS (elt
)->car
, result
);
468 /* Otherwise, put (symbol . value) in the list. */
470 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
474 /* Add on all the variables stored in special slots. */
476 register int offset
, mask
;
478 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
479 offset
< sizeof (struct buffer
);
480 offset
+= (sizeof (int))) /* sizeof int == sizeof Lisp_Object */
482 mask
= *(int *)(offset
+ (char *) &buffer_local_flags
);
483 if (mask
== -1 || (buf
->local_var_flags
& mask
))
484 if (XTYPE (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
486 result
= Fcons (Fcons (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
),
487 *(Lisp_Object
*)(offset
+ (char *)buf
)),
496 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
498 "Return t if BUFFER was modified since its file was last read or saved.\n\
499 No argument or nil as argument means use current buffer as BUFFER.")
501 register Lisp_Object buffer
;
503 register struct buffer
*buf
;
505 buf
= current_buffer
;
508 CHECK_BUFFER (buffer
, 0);
509 buf
= XBUFFER (buffer
);
512 return buf
->save_modified
< BUF_MODIFF (buf
) ? Qt
: Qnil
;
515 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
517 "Mark current buffer as modified or unmodified according to FLAG.\n\
518 A non-nil FLAG means mark the buffer modified.")
520 register Lisp_Object flag
;
522 register int already
;
523 register Lisp_Object fn
;
525 #ifdef CLASH_DETECTION
526 /* If buffer becoming modified, lock the file.
527 If buffer becoming unmodified, unlock the file. */
529 fn
= current_buffer
->filename
;
532 already
= current_buffer
->save_modified
< MODIFF
;
533 if (!already
&& !NILP (flag
))
535 else if (already
&& NILP (flag
))
538 #endif /* CLASH_DETECTION */
540 current_buffer
->save_modified
= NILP (flag
) ? MODIFF
: 0;
545 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
547 "Return BUFFER's tick counter, incremented for each change in text.\n\
548 Each buffer has a tick counter which is incremented each time the text in\n\
549 that buffer is changed. It wraps around occasionally.\n\
550 No argument or nil as argument means use current buffer as BUFFER.")
552 register Lisp_Object buffer
;
554 register struct buffer
*buf
;
556 buf
= current_buffer
;
559 CHECK_BUFFER (buffer
, 0);
560 buf
= XBUFFER (buffer
);
563 return make_number (BUF_MODIFF (buf
));
566 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
567 "sRename buffer (to new name): \nP",
568 "Change current buffer's name to NEWNAME (a string).\n\
569 If second arg UNIQUE is nil or omitted, it is an error if a\n\
570 buffer named NEWNAME already exists.\n\
571 If UNIQUE is non-nil, come up with a new name using\n\
572 `generate-new-buffer-name'.\n\
573 Interactively, you can set UNIQUE with a prefix argument.\n\
574 We return the name we actually gave the buffer.\n\
575 This does not change the name of the visited file (if any).")
577 register Lisp_Object name
, unique
;
579 register Lisp_Object tem
, buf
;
581 CHECK_STRING (name
, 0);
582 tem
= Fget_buffer (name
);
583 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
584 the buffer automatically so you can create another with the original name.
585 It makes UNIQUE equivalent to
586 (rename-buffer (generate-new-buffer-name NAME)). */
587 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
588 return current_buffer
->name
;
592 name
= Fgenerate_new_buffer_name (name
, current_buffer
->name
);
594 error ("Buffer name \"%s\" is in use", XSTRING (name
)->data
);
597 current_buffer
->name
= name
;
599 /* Catch redisplay's attention. Unless we do this, the mode lines for
600 any windows displaying current_buffer will stay unchanged. */
603 XSET (buf
, Lisp_Buffer
, current_buffer
);
604 Fsetcar (Frassq (buf
, Vbuffer_alist
), name
);
605 if (NILP (current_buffer
->filename
) && !NILP (current_buffer
->auto_save_file_name
))
606 call0 (intern ("rename-auto-save-file"));
610 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 2, 0,
611 "Return most recently selected buffer other than BUFFER.\n\
612 Buffers not visible in windows are preferred to visible buffers,\n\
613 unless optional second argument VISIBLE-OK is non-nil.\n\
614 If no other buffer exists, the buffer `*scratch*' is returned.\n\
615 If BUFFER is omitted or nil, some interesting buffer is returned.")
617 register Lisp_Object buffer
, visible_ok
;
619 register Lisp_Object tail
, buf
, notsogood
, tem
;
622 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
624 buf
= Fcdr (Fcar (tail
));
625 if (EQ (buf
, buffer
))
627 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
629 if (NILP (visible_ok
))
630 tem
= Fget_buffer_window (buf
, Qt
);
635 if (NILP (notsogood
))
638 if (!NILP (notsogood
))
640 return Fget_buffer_create (build_string ("*scratch*"));
643 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
, 0, 1,
645 "Make BUFFER stop keeping undo information.\n\
646 No argument or nil as argument means do this for the current buffer.")
648 register Lisp_Object buffer
;
650 Lisp_Object real_buffer
;
653 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
656 real_buffer
= Fget_buffer (buffer
);
657 if (NILP (real_buffer
))
661 XBUFFER (real_buffer
)->undo_list
= Qt
;
666 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
668 "Start keeping undo information for buffer BUFFER.\n\
669 No argument or nil as argument means do this for the current buffer.")
671 register Lisp_Object buffer
;
673 Lisp_Object real_buffer
;
676 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
679 real_buffer
= Fget_buffer (buffer
);
680 if (NILP (real_buffer
))
684 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
685 XBUFFER (real_buffer
)->undo_list
= Qnil
;
691 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
692 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
693 The buffer being killed will be current while the hook is running.\n\
696 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
697 "Kill the buffer BUFFER.\n\
698 The argument may be a buffer or may be the name of a buffer.\n\
699 An argument of nil means kill the current buffer.\n\n\
700 Value is t if the buffer is actually killed, nil if user says no.\n\n\
701 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
702 if not void, is a list of functions to be called, with no arguments,\n\
703 before the buffer is actually killed. The buffer to be killed is current\n\
704 when the hook functions are called.\n\n\
705 Any processes that have this buffer as the `process-buffer' are killed\n\
706 with `delete-process'.")
711 register struct buffer
*b
;
712 register Lisp_Object tem
;
713 register struct Lisp_Marker
*m
;
714 struct gcpro gcpro1
, gcpro2
;
717 buf
= Fcurrent_buffer ();
719 buf
= Fget_buffer (bufname
);
725 /* Query if the buffer is still modified. */
726 if (INTERACTIVE
&& !NILP (b
->filename
)
727 && BUF_MODIFF (b
) > b
->save_modified
)
729 GCPRO2 (buf
, bufname
);
730 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
731 XSTRING (b
->name
)->data
));
737 /* Run hooks with the buffer to be killed the current buffer. */
739 register Lisp_Object val
;
740 int count
= specpdl_ptr
- specpdl
;
743 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
744 set_buffer_internal (b
);
746 /* First run the query functions; if any query is answered no,
747 don't kill the buffer. */
748 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
750 tem
= call0 (Fcar (list
));
752 return unbind_to (count
, Qnil
);
755 /* Then run the hooks. */
756 if (!NILP (Vrun_hooks
))
757 call1 (Vrun_hooks
, Qkill_buffer_hook
);
758 unbind_to (count
, Qnil
);
761 /* We have no more questions to ask. Verify that it is valid
762 to kill the buffer. This must be done after the questions
763 since anything can happen within do_yes_or_no_p. */
765 /* Don't kill the minibuffer now current. */
766 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
772 /* Make this buffer not be current.
773 In the process, notice if this is the sole visible buffer
774 and give up if so. */
775 if (b
== current_buffer
)
777 tem
= Fother_buffer (buf
, Qnil
);
779 if (b
== current_buffer
)
783 /* Now there is no question: we can kill the buffer. */
785 #ifdef CLASH_DETECTION
786 /* Unlock this buffer's file, if it is locked. */
788 #endif /* CLASH_DETECTION */
790 kill_buffer_processes (buf
);
794 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
795 Freplace_buffer_in_windows (buf
);
798 /* Delete any auto-save file. */
799 if (XTYPE (b
->auto_save_file_name
) == Lisp_String
)
802 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
804 unlink (XSTRING (b
->auto_save_file_name
)->data
);
807 /* Unchain all markers of this buffer
808 and leave them pointing nowhere. */
809 for (tem
= b
->markers
; !EQ (tem
, Qnil
); )
818 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
819 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
820 /* Perhaps we should explicitly free the interval tree here... */
824 BUFFER_FREE (BUF_BEG_ADDR (b
));
831 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
832 we do this each time BUF is selected visibly, the more recently
833 selected buffers are always closer to the front of the list. This
834 means that other_buffer is more likely to choose a relevant buffer. */
839 register Lisp_Object link
, prev
;
842 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
844 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
849 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
850 we cannot use Fdelq itself here because it allows quitting. */
853 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
855 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
857 XCONS(link
)->cdr
= Vbuffer_alist
;
858 Vbuffer_alist
= link
;
861 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
862 "Select buffer BUFFER in the current window.\n\
863 BUFFER may be a buffer or a buffer name.\n\
864 Optional second arg NORECORD non-nil means\n\
865 do not put this buffer at the front of the list of recently selected ones.\n\
867 WARNING: This is NOT the way to work on another buffer temporarily\n\
868 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
869 the window-buffer correspondences.")
871 Lisp_Object bufname
, norecord
;
873 register Lisp_Object buf
;
876 if (EQ (minibuf_window
, selected_window
))
877 error ("Cannot switch buffers in minibuffer window");
878 tem
= Fwindow_dedicated_p (selected_window
);
880 error ("Cannot switch buffers in a dedicated window");
883 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
885 buf
= Fget_buffer_create (bufname
);
890 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
891 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
898 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 2, 0,
899 "Select buffer BUFFER in some window, preferably a different one.\n\
900 If BUFFER is nil, then some other buffer is chosen.\n\
901 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
902 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
903 window even if BUFFER is already visible in the selected window.")
905 Lisp_Object bufname
, other
;
907 register Lisp_Object buf
;
909 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
911 buf
= Fget_buffer_create (bufname
);
914 Fselect_window (Fdisplay_buffer (buf
, other
));
918 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
919 "Return the current buffer as a Lisp object.")
922 register Lisp_Object buf
;
923 XSET (buf
, Lisp_Buffer
, current_buffer
);
927 /* Set the current buffer to b */
930 set_buffer_internal (b
)
931 register struct buffer
*b
;
933 register struct buffer
*old_buf
;
934 register Lisp_Object tail
, valcontents
;
937 if (current_buffer
== b
)
940 windows_or_buffers_changed
= 1;
941 old_buf
= current_buffer
;
943 last_known_column_point
= -1; /* invalidate indentation cache */
945 /* Look down buffer's list of local Lisp variables
946 to find and update any that forward into C variables. */
948 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
950 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
951 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
952 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
953 && (tem
= XTYPE (XCONS (valcontents
)->car
),
954 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
955 || tem
== Lisp_Objfwd
)))
956 /* Just reference the variable
957 to cause it to become set for this buffer. */
958 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
961 /* Do the same with any others that were local to the previous buffer */
964 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
966 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
967 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
968 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
969 && (tem
= XTYPE (XCONS (valcontents
)->car
),
970 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
971 || tem
== Lisp_Objfwd
)))
972 /* Just reference the variable
973 to cause it to become set for this buffer. */
974 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
978 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
979 "Make the buffer BUFFER current for editing operations.\n\
980 BUFFER may be a buffer or the name of an existing buffer.\n\
981 See also `save-excursion' when you want to make a buffer current temporarily.\n\
982 This function does not display the buffer, so its effect ends\n\
983 when the current command terminates.\n\
984 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
986 register Lisp_Object bufname
;
988 register Lisp_Object buffer
;
989 buffer
= Fget_buffer (bufname
);
992 if (NILP (XBUFFER (buffer
)->name
))
993 error ("Selecting deleted buffer");
994 set_buffer_internal (XBUFFER (buffer
));
998 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
999 Sbarf_if_buffer_read_only
, 0, 0, 0,
1000 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1003 if (!NILP (current_buffer
->read_only
)
1004 && NILP (Vinhibit_read_only
))
1005 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1009 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1010 "Put BUFFER at the end of the list of all buffers.\n\
1011 There it is the least likely candidate for `other-buffer' to return;\n\
1012 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1013 If BUFFER is nil or omitted, bury the current buffer.\n\
1014 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1015 selected window if it is displayed there.")
1017 register Lisp_Object buf
;
1019 /* Figure out what buffer we're going to bury. */
1022 XSET (buf
, Lisp_Buffer
, current_buffer
);
1024 /* If we're burying the current buffer, unshow it. */
1025 Fswitch_to_buffer (Fother_buffer (buf
, Qnil
), Qnil
);
1031 buf1
= Fget_buffer (buf
);
1037 /* Move buf to the end of the buffer list. */
1039 register Lisp_Object aelt
, link
;
1041 aelt
= Frassq (buf
, Vbuffer_alist
);
1042 link
= Fmemq (aelt
, Vbuffer_alist
);
1043 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1044 XCONS (link
)->cdr
= Qnil
;
1045 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1051 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1052 "Delete the entire contents of the current buffer.\n\
1053 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1054 so the buffer is truly empty after this.")
1059 current_buffer
->last_window_start
= 1;
1060 /* Prevent warnings, or suspension of auto saving, that would happen
1061 if future size is less than past size. Use of erase-buffer
1062 implies that the future text is not really related to the past text. */
1063 XFASTINT (current_buffer
->save_length
) = 0;
1067 validate_region (b
, e
)
1068 register Lisp_Object
*b
, *e
;
1072 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1073 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1075 if (XINT (*b
) > XINT (*e
))
1077 i
= XFASTINT (*b
); /* This is legit even if *b is < 0 */
1079 XFASTINT (*e
) = i
; /* because this is all we do with i. */
1082 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1083 && XINT (*e
) <= ZV
))
1084 args_out_of_range (*b
, *e
);
1088 list_buffers_1 (files
)
1091 register Lisp_Object tail
, tem
, buf
;
1092 Lisp_Object col1
, col2
, col3
, minspace
;
1093 register struct buffer
*old
= current_buffer
, *b
;
1094 Lisp_Object desired_point
;
1095 Lisp_Object other_file_symbol
;
1097 desired_point
= Qnil
;
1098 other_file_symbol
= intern ("list-buffers-directory");
1100 XFASTINT (col1
) = 19;
1101 XFASTINT (col2
) = 25;
1102 XFASTINT (col3
) = 40;
1103 XFASTINT (minspace
) = 1;
1105 Fset_buffer (Vstandard_output
);
1107 tail
= intern ("Buffer-menu-mode");
1108 if (!EQ (tail
, current_buffer
->major_mode
)
1109 && (tem
= Ffboundp (tail
), !NILP (tem
)))
1111 Fbuffer_disable_undo (Vstandard_output
);
1112 current_buffer
->read_only
= Qnil
;
1115 MR Buffer Size Mode File\n\
1116 -- ------ ---- ---- ----\n", -1);
1118 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1120 buf
= Fcdr (Fcar (tail
));
1122 /* Don't mention the minibuffers. */
1123 if (XSTRING (b
->name
)->data
[0] == ' ')
1125 /* Optionally don't mention buffers that lack files. */
1126 if (!NILP (files
) && NILP (b
->filename
))
1128 /* Identify the current buffer. */
1130 XFASTINT (desired_point
) = point
;
1131 write_string (b
== old
? "." : " ", -1);
1132 /* Identify modified buffers */
1133 write_string (BUF_MODIFF (b
) > b
->save_modified
? "*" : " ", -1);
1134 write_string (NILP (b
->read_only
) ? " " : "% ", -1);
1135 Fprinc (b
->name
, Qnil
);
1136 Findent_to (col1
, make_number (2));
1137 XFASTINT (tem
) = BUF_Z (b
) - BUF_BEG (b
);
1139 Findent_to (col2
, minspace
);
1140 Fprinc (b
->mode_name
, Qnil
);
1141 Findent_to (col3
, minspace
);
1143 if (!NILP (b
->filename
))
1144 Fprinc (b
->filename
, Qnil
);
1147 /* No visited file; check local value of list-buffers-directory. */
1149 set_buffer_internal (b
);
1150 tem
= Fboundp (other_file_symbol
);
1153 tem
= Fsymbol_value (other_file_symbol
);
1154 Fset_buffer (Vstandard_output
);
1155 if (XTYPE (tem
) == Lisp_String
)
1159 Fset_buffer (Vstandard_output
);
1161 write_string ("\n", -1);
1164 current_buffer
->read_only
= Qt
;
1165 set_buffer_internal (old
);
1166 return desired_point
;
1169 DEFUN ("list-buffers", Flist_buffers
, Slist_buffers
, 0, 1, "P",
1170 "Display a list of names of existing buffers.\n\
1171 The list is displayed in a buffer named `*Buffer List*'.\n\
1172 Note that buffers with names starting with spaces are omitted.\n\
1173 Non-null optional arg FILES-ONLY means mention only file buffers.\n\
1175 The M column contains a * for buffers that are modified.\n\
1176 The R column contains a % for buffers that are read-only.")
1180 Lisp_Object desired_point
;
1183 = internal_with_output_to_temp_buffer ("*Buffer List*",
1184 list_buffers_1
, files
);
1186 if (NUMBERP (desired_point
))
1188 int count
= specpdl_ptr
- specpdl
;
1189 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
1190 Fset_buffer (build_string ("*Buffer List*"));
1191 SET_PT (XINT (desired_point
));
1192 return unbind_to (count
, Qnil
);
1197 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1199 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1200 Most local variable bindings are eliminated so that the default values\n\
1201 become effective once more. Also, the syntax table is set from\n\
1202 `standard-syntax-table', the local keymap is set to nil,\n\
1203 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1204 This function also forces redisplay of the mode line.\n\
1206 Every function to select a new major mode starts by\n\
1207 calling this function.\n\n\
1208 As a special exception, local variables whose names have\n\
1209 a non-nil `permanent-local' property are not eliminated by this function.")
1212 register Lisp_Object alist
, sym
, tem
;
1215 if (!NILP (Vrun_hooks
))
1216 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1217 oalist
= current_buffer
->local_var_alist
;
1219 /* Make sure no local variables remain set up with this buffer
1220 for their current values. */
1222 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1224 sym
= XCONS (XCONS (alist
)->car
)->car
;
1226 /* Need not do anything if some other buffer's binding is now encached. */
1227 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
;
1228 if (XBUFFER (tem
) == current_buffer
)
1230 /* Symbol is set up for this buffer's old local value.
1231 Set it up for the current buffer with the default value. */
1233 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1234 /* Store the symbol's current value into the alist entry
1235 it is currently set up for. This is so that, if the
1236 local is marked permanent, and we make it local again below,
1237 we don't lose the value. */
1238 XCONS (XCONS (tem
)->car
)->cdr
1239 = do_symval_forwarding (XCONS (XSYMBOL (sym
)->value
)->car
);
1240 /* Switch to the symbol's default-value alist entry. */
1241 XCONS (tem
)->car
= tem
;
1242 /* Mark it as current for the current buffer. */
1243 XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
= Fcurrent_buffer ();
1244 /* Store the current value into any forwarding in the symbol. */
1245 store_symval_forwarding (sym
, XCONS (XSYMBOL (sym
)->value
)->car
,
1250 /* Actually eliminate all local bindings of this buffer. */
1252 reset_buffer_local_variables (current_buffer
);
1254 /* Redisplay mode lines; we are changing major mode. */
1256 update_mode_lines
++;
1258 /* Any which are supposed to be permanent,
1259 make local again, with the same values they had. */
1261 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1263 sym
= XCONS (XCONS (alist
)->car
)->car
;
1264 tem
= Fget (sym
, Qpermanent_local
);
1267 Fmake_local_variable (sym
);
1268 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1272 /* Force mode-line redisplay. Useful here because all major mode
1273 commands call this function. */
1274 update_mode_lines
++;
1279 /* Find all the overlays in the current buffer that contain position POS.
1280 Return the number found, and store them in a vector in *VEC_PTR.
1281 Store in *LEN_PTR the size allocated for the vector.
1282 Store in *NEXT_PTR the next position after POS where an overlay starts,
1283 or ZV if there are no more overlays.
1285 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1286 when this function is called.
1288 If EXTEND is non-zero, we make the vector bigger if necessary.
1289 If EXTEND is zero, we never extend the vector,
1290 and we store only as many overlays as will fit.
1291 But we still return the total number of overlays. */
1294 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
)
1297 Lisp_Object
**vec_ptr
;
1301 Lisp_Object tail
, overlay
, start
, end
, result
;
1304 Lisp_Object
*vec
= *vec_ptr
;
1306 int inhibit_storing
= 0;
1308 for (tail
= current_buffer
->overlays_before
;
1310 tail
= XCONS (tail
)->cdr
)
1314 overlay
= XCONS (tail
)->car
;
1315 if (! OVERLAY_VALID (overlay
))
1318 start
= OVERLAY_START (overlay
);
1319 end
= OVERLAY_END (overlay
);
1320 if (OVERLAY_POSITION (end
) <= pos
)
1322 startpos
= OVERLAY_POSITION (start
);
1323 if (startpos
<= pos
)
1327 /* The supplied vector is full.
1328 Either make it bigger, or don't store any more in it. */
1331 *len_ptr
= len
*= 2;
1332 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1336 inhibit_storing
= 1;
1339 if (!inhibit_storing
)
1341 /* Keep counting overlays even if we can't return them all. */
1344 else if (startpos
< next
)
1348 for (tail
= current_buffer
->overlays_after
;
1350 tail
= XCONS (tail
)->cdr
)
1354 overlay
= XCONS (tail
)->car
;
1355 if (! OVERLAY_VALID (overlay
))
1358 start
= OVERLAY_START (overlay
);
1359 end
= OVERLAY_END (overlay
);
1360 startpos
= OVERLAY_POSITION (start
);
1363 if (startpos
< next
)
1367 if (pos
< OVERLAY_POSITION (end
))
1373 *len_ptr
= len
*= 2;
1374 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1378 inhibit_storing
= 1;
1381 if (!inhibit_storing
)
1393 Lisp_Object overlay
;
1399 compare_overlays (s1
, s2
)
1400 struct sortvec
*s1
, *s2
;
1402 if (s1
->priority
!= s2
->priority
)
1403 return s1
->priority
- s2
->priority
;
1404 if (s1
->beg
!= s2
->beg
)
1405 return s1
->beg
- s2
->beg
;
1406 if (s1
->end
!= s2
->end
)
1407 return s2
->end
- s1
->end
;
1411 /* Sort an array of overlays by priority. The array is modified in place.
1412 The return value is the new size; this may be smaller than the original
1413 size if some of the overlays were invalid or were window-specific. */
1415 sort_overlays (overlay_vec
, noverlays
, w
)
1416 Lisp_Object
*overlay_vec
;
1421 struct sortvec
*sortvec
;
1422 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
1424 /* Put the valid and relevant overlays into sortvec. */
1426 for (i
= 0, j
= 0; i
< noverlays
; i
++)
1429 Lisp_Object overlay
= overlay_vec
[i
];
1431 if (OVERLAY_VALID (overlay
)
1432 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
1433 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
1435 /* If we're interested in a specific window, then ignore
1436 overlays that are limited to some other window. */
1441 window
= Foverlay_get (overlay
, Qwindow
);
1442 if (XTYPE (window
) == Lisp_Window
&& XWINDOW (window
) != w
)
1446 /* This overlay is good and counts: put it into sortvec. */
1447 sortvec
[j
].overlay
= overlay
;
1448 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1449 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1450 tem
= Foverlay_get (overlay
, Qpriority
);
1452 sortvec
[j
].priority
= XINT (tem
);
1454 sortvec
[j
].priority
= 0;
1460 /* Sort the overlays into the proper order: increasing priority. */
1463 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
1465 for (i
= 0; i
< noverlays
; i
++)
1466 overlay_vec
[i
] = sortvec
[i
].overlay
;
1470 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
1473 recenter_overlay_lists (buf
, pos
)
1477 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
1479 /* See if anything in overlays_before should move to overlays_after. */
1481 /* We don't strictly need prev in this loop; it should always be nil.
1482 But we use it for symmetry and in case that should cease to be true
1483 with some future change. */
1485 for (tail
= buf
->overlays_before
;
1487 prev
= tail
, tail
= next
)
1489 next
= XCONS (tail
)->cdr
;
1490 overlay
= XCONS (tail
)->car
;
1492 /* If the overlay is not valid, get rid of it. */
1493 if (!OVERLAY_VALID (overlay
))
1498 /* Splice the cons cell TAIL out of overlays_before. */
1500 XCONS (prev
)->cdr
= next
;
1502 buf
->overlays_before
= next
;
1508 beg
= OVERLAY_START (overlay
);
1509 end
= OVERLAY_END (overlay
);
1511 if (OVERLAY_POSITION (end
) > pos
)
1513 /* OVERLAY needs to be moved. */
1514 int where
= OVERLAY_POSITION (beg
);
1515 Lisp_Object other
, other_prev
;
1517 /* Splice the cons cell TAIL out of overlays_before. */
1519 XCONS (prev
)->cdr
= next
;
1521 buf
->overlays_before
= next
;
1523 /* Search thru overlays_after for where to put it. */
1525 for (other
= buf
->overlays_after
;
1527 other_prev
= other
, other
= XCONS (other
)->cdr
)
1529 Lisp_Object otherbeg
, otheroverlay
, follower
;
1532 otheroverlay
= XCONS (other
)->car
;
1533 if (! OVERLAY_VALID (otheroverlay
))
1536 otherbeg
= OVERLAY_START (otheroverlay
);
1537 if (OVERLAY_POSITION (otherbeg
) >= where
)
1541 /* Add TAIL to overlays_after before OTHER. */
1542 XCONS (tail
)->cdr
= other
;
1543 if (!NILP (other_prev
))
1544 XCONS (other_prev
)->cdr
= tail
;
1546 buf
->overlays_after
= tail
;
1550 /* We've reached the things that should stay in overlays_before.
1551 All the rest of overlays_before must end even earlier,
1556 /* See if anything in overlays_after should be in overlays_before. */
1558 for (tail
= buf
->overlays_after
;
1560 prev
= tail
, tail
= next
)
1562 next
= XCONS (tail
)->cdr
;
1563 overlay
= XCONS (tail
)->car
;
1565 /* If the overlay is not valid, get rid of it. */
1566 if (!OVERLAY_VALID (overlay
))
1571 /* Splice the cons cell TAIL out of overlays_after. */
1573 XCONS (prev
)->cdr
= next
;
1575 buf
->overlays_after
= next
;
1581 beg
= OVERLAY_START (overlay
);
1582 end
= OVERLAY_END (overlay
);
1584 /* Stop looking, when we know that nothing further
1585 can possibly end before POS. */
1586 if (OVERLAY_POSITION (beg
) > pos
)
1589 if (OVERLAY_POSITION (end
) <= pos
)
1591 /* OVERLAY needs to be moved. */
1592 int where
= OVERLAY_POSITION (end
);
1593 Lisp_Object other
, other_prev
;
1595 /* Splice the cons cell TAIL out of overlays_after. */
1597 XCONS (prev
)->cdr
= next
;
1599 buf
->overlays_after
= next
;
1601 /* Search thru overlays_before for where to put it. */
1603 for (other
= buf
->overlays_before
;
1605 other_prev
= other
, other
= XCONS (other
)->cdr
)
1607 Lisp_Object otherend
, otheroverlay
;
1610 otheroverlay
= XCONS (other
)->car
;
1611 if (! OVERLAY_VALID (otheroverlay
))
1614 otherend
= OVERLAY_END (otheroverlay
);
1615 if (OVERLAY_POSITION (otherend
) <= where
)
1619 /* Add TAIL to overlays_before before OTHER. */
1620 XCONS (tail
)->cdr
= other
;
1621 if (!NILP (other_prev
))
1622 XCONS (other_prev
)->cdr
= tail
;
1624 buf
->overlays_before
= tail
;
1629 XFASTINT (buf
->overlay_center
) = pos
;
1632 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
1633 "Return t if OBJECT is an overlay.")
1637 return (OVERLAYP (object
) ? Qt
: Qnil
);
1640 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 3, 0,
1641 "Create a new overlay with range BEG to END in BUFFER.\n\
1642 If omitted, BUFFER defaults to the current buffer.\n\
1643 BEG and END may be integers or markers.")
1645 Lisp_Object beg
, end
, buffer
;
1647 Lisp_Object overlay
;
1651 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1653 CHECK_BUFFER (buffer
, 2);
1655 && ! EQ (Fmarker_buffer (beg
), buffer
))
1656 error ("Marker points into wrong buffer");
1658 && ! EQ (Fmarker_buffer (end
), buffer
))
1659 error ("Marker points into wrong buffer");
1661 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1662 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1664 if (XINT (beg
) > XINT (end
))
1666 Lisp_Object temp
= beg
;
1667 beg
= end
; end
= temp
;
1670 b
= XBUFFER (buffer
);
1672 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
1673 end
= Fset_marker (Fmake_marker (), end
, buffer
);
1675 overlay
= Fcons (Fcons (beg
, end
), Qnil
);
1676 XSETTYPE (overlay
, Lisp_Overlay
);
1678 /* Put the new overlay on the wrong list. */
1679 end
= OVERLAY_END (overlay
);
1680 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1681 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1683 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1685 /* This puts it in the right list, and in the right order. */
1686 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1688 /* We don't need to redisplay the region covered by the overlay, because
1689 the overlay has no properties at the moment. */
1694 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
1695 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
1696 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
1697 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
1699 (overlay
, beg
, end
, buffer
)
1700 Lisp_Object overlay
, beg
, end
, buffer
;
1702 struct buffer
*b
, *ob
;
1703 Lisp_Object obuffer
;
1704 int count
= specpdl_ptr
- specpdl
;
1706 CHECK_OVERLAY (overlay
, 0);
1708 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1710 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1711 CHECK_BUFFER (buffer
, 3);
1714 && ! EQ (Fmarker_buffer (beg
), buffer
))
1715 error ("Marker points into wrong buffer");
1717 && ! EQ (Fmarker_buffer (end
), buffer
))
1718 error ("Marker points into wrong buffer");
1720 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1721 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1723 specbind (Qinhibit_quit
, Qt
);
1725 if (XINT (beg
) > XINT (end
))
1727 Lisp_Object temp
= beg
;
1728 beg
= end
; end
= temp
;
1731 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1732 b
= XBUFFER (buffer
);
1733 ob
= XBUFFER (obuffer
);
1735 /* If the overlay has changed buffers, do a thorough redisplay. */
1736 if (!EQ (buffer
, obuffer
))
1737 windows_or_buffers_changed
= 1;
1739 /* Redisplay the area the overlay has just left, or just enclosed. */
1743 int change_beg
, change_end
;
1745 o_beg
= OVERLAY_START (overlay
);
1746 o_end
= OVERLAY_END (overlay
);
1747 o_beg
= OVERLAY_POSITION (o_beg
);
1748 o_end
= OVERLAY_POSITION (o_end
);
1750 if (XINT (o_beg
) == XINT (beg
))
1751 redisplay_region (b
, XINT (o_end
), XINT (end
));
1752 else if (XINT (o_end
) == XINT (end
))
1753 redisplay_region (b
, XINT (o_beg
), XINT (beg
));
1756 if (XINT (beg
) < XINT (o_beg
)) o_beg
= beg
;
1757 if (XINT (end
) > XINT (o_end
)) o_end
= end
;
1758 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
1762 if (!NILP (obuffer
))
1764 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
1765 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
1768 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
1769 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
1771 /* Put the overlay on the wrong list. */
1772 end
= OVERLAY_END (overlay
);
1773 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1774 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1776 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1778 /* This puts it in the right list, and in the right order. */
1779 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1781 return unbind_to (count
, overlay
);
1784 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
1785 "Delete the overlay OVERLAY from its buffer.")
1787 Lisp_Object overlay
;
1791 int count
= specpdl_ptr
- specpdl
;
1793 CHECK_OVERLAY (overlay
, 0);
1795 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1799 b
= XBUFFER (buffer
);
1801 specbind (Qinhibit_quit
, Qt
);
1803 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
1804 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
1806 redisplay_region (b
,
1807 marker_position (OVERLAY_START (overlay
)),
1808 marker_position (OVERLAY_END (overlay
)));
1810 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
1811 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
1813 return unbind_to (count
, Qnil
);
1816 /* Overlay dissection functions. */
1818 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
1819 "Return the position at which OVERLAY starts.")
1821 Lisp_Object overlay
;
1823 CHECK_OVERLAY (overlay
, 0);
1825 return (Fmarker_position (OVERLAY_START (overlay
)));
1828 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
1829 "Return the position at which OVERLAY ends.")
1831 Lisp_Object overlay
;
1833 CHECK_OVERLAY (overlay
, 0);
1835 return (Fmarker_position (OVERLAY_END (overlay
)));
1838 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
1839 "Return the buffer OVERLAY belongs to.")
1841 Lisp_Object overlay
;
1843 CHECK_OVERLAY (overlay
, 0);
1845 return Fmarker_buffer (OVERLAY_START (overlay
));
1848 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
1849 "Return a list of the properties on OVERLAY.\n\
1850 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
1853 Lisp_Object overlay
;
1855 CHECK_OVERLAY (overlay
, 0);
1857 return Fcopy_sequence (Fcdr_safe (XCONS (overlay
)->cdr
));
1861 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
1862 "Return a list of the overlays that contain position POS.")
1868 Lisp_Object
*overlay_vec
;
1872 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1875 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1877 /* Put all the overlays we want in a vector in overlay_vec.
1878 Store the length in len. */
1879 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
1881 /* Make a list of them all. */
1882 result
= Flist (noverlays
, overlay_vec
);
1884 xfree (overlay_vec
);
1888 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
1890 "Return the next position after POS where an overlay starts or ends.")
1896 Lisp_Object
*overlay_vec
;
1901 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1904 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1906 /* Put all the overlays we want in a vector in overlay_vec.
1907 Store the length in len.
1908 endpos gets the position where the next overlay starts. */
1909 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
1911 /* If any of these overlays ends before endpos,
1912 use its ending point instead. */
1913 for (i
= 0; i
< noverlays
; i
++)
1918 oend
= OVERLAY_END (overlay_vec
[i
]);
1919 oendpos
= OVERLAY_POSITION (oend
);
1920 if (oendpos
< endpos
)
1924 xfree (overlay_vec
);
1925 return make_number (endpos
);
1928 /* These functions are for debugging overlays. */
1930 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
1931 "Return a pair of lists giving all the overlays of the current buffer.\n\
1932 The car has all the overlays before the overlay center;\n\
1933 the cdr has all the overlays before the overlay center.\n\
1934 Recentering overlays moves overlays between these lists.\n\
1935 The lists you get are copies, so that changing them has no effect.\n\
1936 However, the overlays you get are the real objects that the buffer uses.")
1939 Lisp_Object before
, after
;
1940 before
= current_buffer
->overlays_before
;
1942 before
= Fcopy_sequence (before
);
1943 after
= current_buffer
->overlays_after
;
1945 after
= Fcopy_sequence (after
);
1947 return Fcons (before
, after
);
1950 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
1951 "Recenter the overlays of the current buffer around position POS.")
1955 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1957 recenter_overlay_lists (current_buffer
, XINT (pos
));
1961 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
1962 "Get the property of overlay OVERLAY with property name NAME.")
1964 Lisp_Object overlay
, prop
;
1968 CHECK_OVERLAY (overlay
, 0);
1970 for (plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
1971 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
1972 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
1974 if (EQ (XCONS (plist
)->car
, prop
))
1975 return XCONS (XCONS (plist
)->cdr
)->car
;
1981 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
1982 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
1983 (overlay
, prop
, value
)
1984 Lisp_Object overlay
, prop
, value
;
1986 Lisp_Object plist
, tail
;
1988 CHECK_OVERLAY (overlay
, 0);
1990 tail
= Fmarker_buffer (OVERLAY_START (overlay
));
1992 redisplay_region (XMARKER (OVERLAY_START (overlay
))->buffer
,
1993 marker_position (OVERLAY_START (overlay
)),
1994 marker_position (OVERLAY_END (overlay
)));
1996 plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
1999 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
2000 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
2002 if (EQ (XCONS (tail
)->car
, prop
))
2003 return XCONS (XCONS (tail
)->cdr
)->car
= value
;
2006 if (! CONSP (XCONS (overlay
)->cdr
))
2007 XCONS (overlay
)->cdr
= Fcons (Qnil
, Qnil
);
2009 XCONS (XCONS (overlay
)->cdr
)->cdr
2010 = Fcons (prop
, Fcons (value
, plist
));
2015 /* Run the modification-hooks of overlays that include
2016 any part of the text in START to END.
2017 Run the insert-before-hooks of overlay starting at END,
2018 and the insert-after-hooks of overlay ending at START. */
2021 verify_overlay_modification (start
, end
)
2022 Lisp_Object start
, end
;
2024 Lisp_Object prop
, overlay
, tail
;
2025 int insertion
= EQ (start
, end
);
2027 for (tail
= current_buffer
->overlays_before
;
2029 tail
= XCONS (tail
)->cdr
)
2031 int startpos
, endpos
;
2032 Lisp_Object ostart
, oend
;
2034 overlay
= XCONS (tail
)->car
;
2036 ostart
= OVERLAY_START (overlay
);
2037 oend
= OVERLAY_END (overlay
);
2038 endpos
= OVERLAY_POSITION (oend
);
2039 if (XFASTINT (start
) > endpos
)
2041 startpos
= OVERLAY_POSITION (ostart
);
2042 if (XFASTINT (end
) == startpos
&& insertion
)
2044 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
2045 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2047 if (XFASTINT (start
) == endpos
&& insertion
)
2049 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
2050 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2053 ? (XFASTINT (start
) > startpos
&& XFASTINT (end
) < endpos
)
2054 : (XFASTINT (start
) >= startpos
&& XFASTINT (end
) <= endpos
))
2056 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
2057 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2061 for (tail
= current_buffer
->overlays_after
;
2063 tail
= XCONS (tail
)->cdr
)
2065 int startpos
, endpos
;
2066 Lisp_Object ostart
, oend
;
2068 overlay
= XCONS (tail
)->car
;
2070 ostart
= OVERLAY_START (overlay
);
2071 oend
= OVERLAY_END (overlay
);
2072 startpos
= OVERLAY_POSITION (ostart
);
2073 endpos
= OVERLAY_POSITION (oend
);
2074 if (XFASTINT (end
) < startpos
)
2076 if (XFASTINT (end
) == startpos
&& insertion
)
2078 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
2079 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2081 if (XFASTINT (start
) == endpos
&& insertion
)
2083 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
2084 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2087 ? (XFASTINT (start
) > startpos
&& XFASTINT (end
) < endpos
)
2088 : (XFASTINT (start
) >= startpos
&& XFASTINT (end
) <= endpos
))
2090 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
2091 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2097 call_overlay_mod_hooks (list
, overlay
, start
, end
)
2098 Lisp_Object list
, overlay
, start
, end
;
2100 struct gcpro gcpro1
;
2102 while (!NILP (list
))
2104 call3 (Fcar (list
), overlay
, start
, end
);
2110 /* Somebody has tried to store NEWVAL into the buffer-local slot with
2111 offset XUINT (valcontents), and NEWVAL has an unacceptable type. */
2113 buffer_slot_type_mismatch (valcontents
, newval
)
2114 Lisp_Object valcontents
, newval
;
2116 unsigned int offset
= XUINT (valcontents
);
2117 unsigned char *symbol_name
=
2118 (XSYMBOL (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
2122 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
2124 case Lisp_Int
: type_name
= "integers"; break;
2125 case Lisp_String
: type_name
= "strings"; break;
2126 case Lisp_Marker
: type_name
= "markers"; break;
2127 case Lisp_Symbol
: type_name
= "symbols"; break;
2128 case Lisp_Cons
: type_name
= "lists"; break;
2129 case Lisp_Vector
: type_name
= "vectors"; break;
2134 error ("only %s should be stored in the buffer-local variable %s",
2135 type_name
, symbol_name
);
2140 register Lisp_Object tem
;
2142 /* Make sure all markable slots in buffer_defaults
2143 are initialized reasonably, so mark_buffer won't choke. */
2144 reset_buffer (&buffer_defaults
);
2145 reset_buffer (&buffer_local_symbols
);
2146 XSET (Vbuffer_defaults
, Lisp_Buffer
, &buffer_defaults
);
2147 XSET (Vbuffer_local_symbols
, Lisp_Buffer
, &buffer_local_symbols
);
2149 /* Set up the default values of various buffer slots. */
2150 /* Must do these before making the first buffer! */
2152 /* real setup is done in loaddefs.el */
2153 buffer_defaults
.mode_line_format
= build_string ("%-");
2154 buffer_defaults
.abbrev_mode
= Qnil
;
2155 buffer_defaults
.overwrite_mode
= Qnil
;
2156 buffer_defaults
.case_fold_search
= Qt
;
2157 buffer_defaults
.auto_fill_function
= Qnil
;
2158 buffer_defaults
.selective_display
= Qnil
;
2160 buffer_defaults
.selective_display_ellipses
= Qt
;
2162 buffer_defaults
.abbrev_table
= Qnil
;
2163 buffer_defaults
.display_table
= Qnil
;
2164 buffer_defaults
.undo_list
= Qnil
;
2165 buffer_defaults
.mark_active
= Qnil
;
2166 buffer_defaults
.overlays_before
= Qnil
;
2167 buffer_defaults
.overlays_after
= Qnil
;
2168 XFASTINT (buffer_defaults
.overlay_center
) = 1;
2170 XFASTINT (buffer_defaults
.tab_width
) = 8;
2171 buffer_defaults
.truncate_lines
= Qnil
;
2172 buffer_defaults
.ctl_arrow
= Qt
;
2175 buffer_defaults
.buffer_file_type
= 0; /* TEXT */
2177 XFASTINT (buffer_defaults
.fill_column
) = 70;
2178 XFASTINT (buffer_defaults
.left_margin
) = 0;
2180 /* Assign the local-flags to the slots that have default values.
2181 The local flag is a bit that is used in the buffer
2182 to say that it has its own local value for the slot.
2183 The local flag bits are in the local_var_flags slot of the buffer. */
2185 /* Nothing can work if this isn't true */
2186 if (sizeof (int) != sizeof (Lisp_Object
)) abort ();
2188 /* 0 means not a lisp var, -1 means always local, else mask */
2189 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
2190 XFASTINT (buffer_local_flags
.filename
) = -1;
2191 XFASTINT (buffer_local_flags
.directory
) = -1;
2192 XFASTINT (buffer_local_flags
.backed_up
) = -1;
2193 XFASTINT (buffer_local_flags
.save_length
) = -1;
2194 XFASTINT (buffer_local_flags
.auto_save_file_name
) = -1;
2195 XFASTINT (buffer_local_flags
.read_only
) = -1;
2196 XFASTINT (buffer_local_flags
.major_mode
) = -1;
2197 XFASTINT (buffer_local_flags
.mode_name
) = -1;
2198 XFASTINT (buffer_local_flags
.undo_list
) = -1;
2199 XFASTINT (buffer_local_flags
.mark_active
) = -1;
2201 XFASTINT (buffer_local_flags
.mode_line_format
) = 1;
2202 XFASTINT (buffer_local_flags
.abbrev_mode
) = 2;
2203 XFASTINT (buffer_local_flags
.overwrite_mode
) = 4;
2204 XFASTINT (buffer_local_flags
.case_fold_search
) = 8;
2205 XFASTINT (buffer_local_flags
.auto_fill_function
) = 0x10;
2206 XFASTINT (buffer_local_flags
.selective_display
) = 0x20;
2208 XFASTINT (buffer_local_flags
.selective_display_ellipses
) = 0x40;
2210 XFASTINT (buffer_local_flags
.tab_width
) = 0x80;
2211 XFASTINT (buffer_local_flags
.truncate_lines
) = 0x100;
2212 XFASTINT (buffer_local_flags
.ctl_arrow
) = 0x200;
2213 XFASTINT (buffer_local_flags
.fill_column
) = 0x400;
2214 XFASTINT (buffer_local_flags
.left_margin
) = 0x800;
2215 XFASTINT (buffer_local_flags
.abbrev_table
) = 0x1000;
2216 XFASTINT (buffer_local_flags
.display_table
) = 0x2000;
2217 XFASTINT (buffer_local_flags
.syntax_table
) = 0x8000;
2219 XFASTINT (buffer_local_flags
.buffer_file_type
) = 0x4000;
2222 Vbuffer_alist
= Qnil
;
2226 QSFundamental
= build_string ("Fundamental");
2228 Qfundamental_mode
= intern ("fundamental-mode");
2229 buffer_defaults
.major_mode
= Qfundamental_mode
;
2231 Qmode_class
= intern ("mode-class");
2233 Qprotected_field
= intern ("protected-field");
2235 Qpermanent_local
= intern ("permanent-local");
2237 Qkill_buffer_hook
= intern ("kill-buffer-hook");
2239 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
2240 /* super-magic invisible buffer */
2241 Vbuffer_alist
= Qnil
;
2243 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2248 char buf
[MAXPATHLEN
+1];
2250 struct stat dotstat
, pwdstat
;
2253 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2255 /* If PWD is accurate, use it instead of calling getwd. This is faster
2256 when PWD is right, and may avoid a fatal error. */
2257 if ((pwd
= getenv ("PWD")) != 0 && *pwd
== '/'
2258 && stat (pwd
, &pwdstat
) == 0
2259 && stat (".", &dotstat
) == 0
2260 && dotstat
.st_ino
== pwdstat
.st_ino
2261 && dotstat
.st_dev
== pwdstat
.st_dev
2262 && strlen (pwd
) < MAXPATHLEN
)
2264 else if (getwd (buf
) == 0)
2265 fatal ("`getwd' failed: %s.\n", buf
);
2268 /* Maybe this should really use some standard subroutine
2269 whose definition is filename syntax dependent. */
2270 if (buf
[strlen (buf
) - 1] != '/')
2272 #endif /* not VMS */
2273 current_buffer
->directory
= build_string (buf
);
2275 temp
= get_minibuffer (0);
2276 XBUFFER (temp
)->directory
= current_buffer
->directory
;
2279 /* initialize the buffer routines */
2282 extern Lisp_Object Qdisabled
;
2284 staticpro (&Vbuffer_defaults
);
2285 staticpro (&Vbuffer_local_symbols
);
2286 staticpro (&Qfundamental_mode
);
2287 staticpro (&Qmode_class
);
2288 staticpro (&QSFundamental
);
2289 staticpro (&Vbuffer_alist
);
2290 staticpro (&Qprotected_field
);
2291 staticpro (&Qpermanent_local
);
2292 staticpro (&Qkill_buffer_hook
);
2293 staticpro (&Qoverlayp
);
2294 staticpro (&Qmodification_hooks
);
2295 Qmodification_hooks
= intern ("modification-hooks");
2296 staticpro (&Qinsert_in_front_hooks
);
2297 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
2298 staticpro (&Qinsert_behind_hooks
);
2299 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
2300 staticpro (&Qget_file_buffer
);
2301 Qget_file_buffer
= intern ("get-file-buffer");
2302 Qpriority
= intern ("priority");
2303 staticpro (&Qpriority
);
2304 Qwindow
= intern ("window");
2305 staticpro (&Qwindow
);
2307 Qoverlayp
= intern ("overlayp");
2309 Fput (Qprotected_field
, Qerror_conditions
,
2310 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
2311 Fput (Qprotected_field
, Qerror_message
,
2312 build_string ("Attempt to modify a protected field"));
2314 /* All these use DEFVAR_LISP_NOPRO because the slots in
2315 buffer_defaults will all be marked via Vbuffer_defaults. */
2317 DEFVAR_LISP_NOPRO ("default-mode-line-format",
2318 &buffer_defaults
.mode_line_format
,
2319 "Default value of `mode-line-format' for buffers that don't override it.\n\
2320 This is the same as (default-value 'mode-line-format).");
2322 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
2323 &buffer_defaults
.abbrev_mode
,
2324 "Default value of `abbrev-mode' for buffers that do not override it.\n\
2325 This is the same as (default-value 'abbrev-mode).");
2327 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
2328 &buffer_defaults
.ctl_arrow
,
2329 "Default value of `ctl-arrow' for buffers that do not override it.\n\
2330 This is the same as (default-value 'ctl-arrow).");
2332 DEFVAR_LISP_NOPRO ("default-truncate-lines",
2333 &buffer_defaults
.truncate_lines
,
2334 "Default value of `truncate-lines' for buffers that do not override it.\n\
2335 This is the same as (default-value 'truncate-lines).");
2337 DEFVAR_LISP_NOPRO ("default-fill-column",
2338 &buffer_defaults
.fill_column
,
2339 "Default value of `fill-column' for buffers that do not override it.\n\
2340 This is the same as (default-value 'fill-column).");
2342 DEFVAR_LISP_NOPRO ("default-left-margin",
2343 &buffer_defaults
.left_margin
,
2344 "Default value of `left-margin' for buffers that do not override it.\n\
2345 This is the same as (default-value 'left-margin).");
2347 DEFVAR_LISP_NOPRO ("default-tab-width",
2348 &buffer_defaults
.tab_width
,
2349 "Default value of `tab-width' for buffers that do not override it.\n\
2350 This is the same as (default-value 'tab-width).");
2352 DEFVAR_LISP_NOPRO ("default-case-fold-search",
2353 &buffer_defaults
.case_fold_search
,
2354 "Default value of `case-fold-search' for buffers that don't override it.\n\
2355 This is the same as (default-value 'case-fold-search).");
2358 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
2359 &buffer_defaults
.buffer_file_type
,
2360 "Default file type for buffers that do not override it.\n\
2361 This is the same as (default-value 'buffer-file-type).\n\
2362 The file type is nil for text, t for binary.");
2365 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
2368 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
2369 But make-docfile finds it!
2370 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
2372 "Template for displaying mode line for current buffer.\n\
2373 Each buffer has its own value of this variable.\n\
2374 Value may be a string, a symbol or a list or cons cell.\n\
2375 For a symbol, its value is used (but it is ignored if t or nil).\n\
2376 A string appearing directly as the value of a symbol is processed verbatim\n\
2377 in that the %-constructs below are not recognized.\n\
2378 For a list whose car is a symbol, the symbol's value is taken,\n\
2379 and if that is non-nil, the cadr of the list is processed recursively.\n\
2380 Otherwise, the caddr of the list (if there is one) is processed.\n\
2381 For a list whose car is a string or list, each element is processed\n\
2382 recursively and the results are effectively concatenated.\n\
2383 For a list whose car is an integer, the cdr of the list is processed\n\
2384 and padded (if the number is positive) or truncated (if negative)\n\
2385 to the width specified by that number.\n\
2386 A string is printed verbatim in the mode line except for %-constructs:\n\
2387 (%-constructs are allowed when the string is the entire mode-line-format\n\
2388 or when it is found in a cons-cell or a list)\n\
2389 %b -- print buffer name. %f -- print visited file name.\n\
2390 %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\
2391 %s -- print process status. %l -- print the current line number.\n\
2392 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
2393 %p -- print percent of buffer above bottom of window, perhaps plus Top,\n\
2394 or print Bottom or All.\n\
2395 %n -- print Narrow if appropriate.\n\
2396 %t -- print T if files is text, B if binary.\n\
2397 %[ -- print one [ for each recursive editing level. %] similar.\n\
2398 %% -- print %. %- -- print infinitely many dashes.\n\
2399 Decimal digits after the % specify field width to which to pad.");
2402 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
2403 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
2404 nil here means use current buffer's major mode.");
2406 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
2407 make_number (Lisp_Symbol
),
2408 "Symbol for current buffer's major mode.");
2410 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
2411 make_number (Lisp_String
),
2412 "Pretty name of current buffer's major mode (a string).");
2414 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
2415 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
2416 Automatically becomes buffer-local when set in any fashion.");
2418 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
2420 "*Non-nil if searches should ignore case.\n\
2421 Automatically becomes buffer-local when set in any fashion.");
2423 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
2424 make_number (Lisp_Int
),
2425 "*Column beyond which automatic line-wrapping should happen.\n\
2426 Automatically becomes buffer-local when set in any fashion.");
2428 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
2429 make_number (Lisp_Int
),
2430 "*Column for the default indent-line-function to indent to.\n\
2431 Linefeed indents to this column in Fundamental mode.\n\
2432 Automatically becomes buffer-local when set in any fashion.");
2434 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
2435 make_number (Lisp_Int
),
2436 "*Distance between tab stops (for display of tab characters), in columns.\n\
2437 Automatically becomes buffer-local when set in any fashion.");
2439 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
2440 "*Non-nil means display control chars with uparrow.\n\
2441 Nil means use backslash and octal digits.\n\
2442 Automatically becomes buffer-local when set in any fashion.\n\
2443 This variable does not apply to characters whose display is specified\n\
2444 in the current display table (if there is one).");
2446 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
2447 "*Non-nil means do not display continuation lines;\n\
2448 give each line of text one screen line.\n\
2449 Automatically becomes buffer-local when set in any fashion.\n\
2451 Note that this is overridden by the variable\n\
2452 `truncate-partial-width-windows' if that variable is non-nil\n\
2453 and this buffer is not full-frame width.");
2456 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
2458 "*If visited file is text, nil; otherwise, t.");
2461 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
2462 make_number (Lisp_String
),
2463 "Name of default directory of current buffer. Should end with slash.\n\
2464 Each buffer has its own value of this variable.");
2466 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
2468 "Function called (if non-nil) to perform auto-fill.\n\
2469 It is called after self-inserting a space at a column beyond `fill-column'.\n\
2470 Each buffer has its own value of this variable.\n\
2471 NOTE: This variable is not an ordinary hook;\n\
2472 It may not be a list of functions.");
2474 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
2475 make_number (Lisp_String
),
2476 "Name of file visited in current buffer, or nil if not visiting a file.\n\
2477 Each buffer has its own value of this variable.");
2479 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
2480 ¤t_buffer
->auto_save_file_name
,
2481 make_number (Lisp_String
),
2482 "Name of file for auto-saving current buffer,\n\
2483 or nil if buffer should not be auto-saved.\n\
2484 Each buffer has its own value of this variable.");
2486 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
2487 "Non-nil if this buffer is read-only.\n\
2488 Each buffer has its own value of this variable.");
2490 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
2491 "Non-nil if this buffer's file has been backed up.\n\
2492 Backing up is done before the first time the file is saved.\n\
2493 Each buffer has its own value of this variable.");
2495 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
2496 make_number (Lisp_Int
),
2497 "Length of current buffer when last read in, saved or auto-saved.\n\
2499 Each buffer has its own value of this variable.");
2501 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
2503 "Non-nil enables selective display:\n\
2504 Integer N as value means display only lines\n\
2505 that start with less than n columns of space.\n\
2506 A value of t means, after a ^M, all the rest of the line is invisible.\n\
2507 Then ^M's in the file are written into files as newlines.\n\n\
2508 Automatically becomes buffer-local when set in any fashion.");
2511 DEFVAR_PER_BUFFER ("selective-display-ellipses",
2512 ¤t_buffer
->selective_display_ellipses
,
2514 "t means display ... on previous line when a line is invisible.\n\
2515 Automatically becomes buffer-local when set in any fashion.");
2518 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
2519 "Non-nil if self-insertion should replace existing text.\n\
2520 If non-nil and not `overwrite-mode-binary', self-insertion still\n\
2521 inserts at the end of a line, and inserts when point is before a tab,\n\
2522 until the tab is filled in.\n\
2523 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
2524 Automatically becomes buffer-local when set in any fashion.");
2526 #if 0 /* The doc string is too long for some compilers,
2527 but make-docfile can find it in this comment. */
2528 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2530 "Display table that controls display of the contents of current buffer.\n\
2531 Automatically becomes buffer-local when set in any fashion.\n\
2532 The display table is a vector created with `make-display-table'.\n\
2533 The first 256 elements control how to display each possible text character.\n\
2534 Each value should be a vector of characters or nil;\n\
2535 nil means display the character in the default fashion.\n\
2536 The remaining five elements control the display of\n\
2537 the end of a truncated screen line (element 256, a single character);\n\
2538 the end of a continued line (element 257, a single character);\n\
2539 the escape character used to display character codes in octal\n\
2540 (element 258, a single character);\n\
2541 the character used as an arrow for control characters (element 259,\n\
2542 a single character);\n\
2543 the decoration indicating the presence of invisible lines (element 260,\n\
2544 a vector of characters).\n\
2545 If this variable is nil, the value of `standard-display-table' is used.\n\
2546 Each window can have its own, overriding display table.");
2548 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2551 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
2554 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
2555 "Function to call before each text change.\n\
2556 Two arguments are passed to the function: the positions of\n\
2557 the beginning and end of the range of old text to be changed.\n\
2558 \(For an insertion, the beginning and end are at the same place.)\n\
2559 No information is given about the length of the text after the change.\n\
2560 position of the change\n\
2562 While executing the `before-change-function', changes to buffers do not\n\
2563 cause calls to any `before-change-function' or `after-change-function'.");
2564 Vbefore_change_function
= Qnil
;
2566 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
2567 "Function to call after each text change.\n\
2568 Three arguments are passed to the function: the positions of\n\
2569 the beginning and end of the range of changed text,\n\
2570 and the length of the pre-change text replaced by that range.\n\
2571 \(For an insertion, the pre-change length is zero;\n\
2572 for a deletion, that length is the number of characters deleted,\n\
2573 and the post-change beginning and end are at the same place.)\n\
2575 While executing the `after-change-function', changes to buffers do not\n\
2576 cause calls to any `before-change-function' or `after-change-function'.");
2577 Vafter_change_function
= Qnil
;
2579 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
2580 "A list of functions to call before changing a buffer which is unmodified.\n\
2581 The functions are run using the `run-hooks' function.");
2582 Vfirst_change_hook
= Qnil
;
2583 Qfirst_change_hook
= intern ("first-change-hook");
2584 staticpro (&Qfirst_change_hook
);
2586 #if 0 /* The doc string is too long for some compilers,
2587 but make-docfile can find it in this comment. */
2588 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2589 "List of undo entries in current buffer.\n\
2590 Recent changes come first; older changes follow newer.\n\
2592 An entry (START . END) represents an insertion which begins at\n\
2593 position START and ends at position END.\n\
2595 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
2596 from (abs POSITION). If POSITION is positive, point was at the front\n\
2597 of the text being deleted; if negative, point was at the end.\n\
2599 An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\
2600 previously unmodified. HIGHWORD and LOWWORD are the high and low\n\
2601 16-bit words of the buffer's modification count at the time. If the\n\
2602 modification count of the most recent save is different, this entry is\n\
2605 An entry (nil PROP VAL BEG . END) indicates that a text property\n\
2606 was modified between BEG and END. PROP is the property name,\n\
2607 and VAL is the old value.\n\
2609 An entry of the form POSITION indicates that point was at the buffer\n\
2610 location given by the integer. Undoing an entry of this form places\n\
2611 point at POSITION.\n\
2613 nil marks undo boundaries. The undo command treats the changes\n\
2614 between two undo boundaries as a single step to be undone.\n\
2616 If the value of the variable is t, undo information is not recorded.");
2618 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2621 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
2622 "Non-nil means the mark and region are currently active in this buffer.\n\
2623 Automatically local in all buffers.");
2625 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
2626 "*Non-nil means deactivate the mark when the buffer contents change.");
2627 Vtransient_mark_mode
= Qnil
;
2629 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
2630 "*Non-nil means disregard read-only status of buffers or characters.\n\
2631 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
2632 text properties. If the value is a list, disregard `buffer-read-only'\n\
2633 and disregard a `read-only' text property if the property value\n\
2634 is a member of the list.");
2635 Vinhibit_read_only
= Qnil
;
2637 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
2638 "List of functions called with no args to query before killing a buffer.");
2639 Vkill_buffer_query_functions
= Qnil
;
2641 defsubr (&Sbuffer_list
);
2642 defsubr (&Sget_buffer
);
2643 defsubr (&Sget_file_buffer
);
2644 defsubr (&Sget_buffer_create
);
2645 defsubr (&Sgenerate_new_buffer_name
);
2646 defsubr (&Sbuffer_name
);
2647 /*defsubr (&Sbuffer_number);*/
2648 defsubr (&Sbuffer_file_name
);
2649 defsubr (&Sbuffer_local_variables
);
2650 defsubr (&Sbuffer_modified_p
);
2651 defsubr (&Sset_buffer_modified_p
);
2652 defsubr (&Sbuffer_modified_tick
);
2653 defsubr (&Srename_buffer
);
2654 defsubr (&Sother_buffer
);
2655 defsubr (&Sbuffer_disable_undo
);
2656 defsubr (&Sbuffer_enable_undo
);
2657 defsubr (&Skill_buffer
);
2658 defsubr (&Serase_buffer
);
2659 defsubr (&Sswitch_to_buffer
);
2660 defsubr (&Spop_to_buffer
);
2661 defsubr (&Scurrent_buffer
);
2662 defsubr (&Sset_buffer
);
2663 defsubr (&Sbarf_if_buffer_read_only
);
2664 defsubr (&Sbury_buffer
);
2665 defsubr (&Slist_buffers
);
2666 defsubr (&Skill_all_local_variables
);
2668 defsubr (&Soverlayp
);
2669 defsubr (&Smake_overlay
);
2670 defsubr (&Sdelete_overlay
);
2671 defsubr (&Smove_overlay
);
2672 defsubr (&Soverlay_start
);
2673 defsubr (&Soverlay_end
);
2674 defsubr (&Soverlay_buffer
);
2675 defsubr (&Soverlay_properties
);
2676 defsubr (&Soverlays_at
);
2677 defsubr (&Snext_overlay_change
);
2678 defsubr (&Soverlay_recenter
);
2679 defsubr (&Soverlay_lists
);
2680 defsubr (&Soverlay_get
);
2681 defsubr (&Soverlay_put
);
2686 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
2687 initial_define_key (control_x_map
, 'k', "kill-buffer");
2688 initial_define_key (control_x_map
, Ctl ('B'), "list-buffers");
2690 /* This must not be in syms_of_buffer, because Qdisabled is not
2691 initialized when that function gets called. */
2692 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);