1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1992, 1993
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"
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 ();
103 /* Alist of all buffer names vs the buffers. */
104 /* This used to be a variable, but is no longer,
105 to prevent lossage due to user rplac'ing this alist or its elements. */
106 Lisp_Object Vbuffer_alist
;
108 /* Functions to call before and after each text change. */
109 Lisp_Object Vbefore_change_function
;
110 Lisp_Object Vafter_change_function
;
112 Lisp_Object Vtransient_mark_mode
;
114 /* List of functions to call before changing an unmodified buffer. */
115 Lisp_Object Vfirst_change_hook
;
116 Lisp_Object Qfirst_change_hook
;
118 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
120 Lisp_Object Qprotected_field
;
122 Lisp_Object QSFundamental
; /* A string "Fundamental" */
124 Lisp_Object Qkill_buffer_hook
;
126 /* For debugging; temporary. See set_buffer_internal. */
127 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
132 if (XTYPE (spec
) == Lisp_String
)
133 error ("No buffer named %s", XSTRING (spec
)->data
);
134 error ("Invalid buffer argument");
137 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 0, 0,
138 "Return a list of all existing live buffers.")
141 return Fmapcar (Qcdr
, Vbuffer_alist
);
144 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
145 "Return the buffer named NAME (a string).\n\
146 If there is no live buffer named NAME, return nil.\n\
147 NAME may also be a buffer; if so, the value is that buffer.")
149 register Lisp_Object name
;
151 if (XTYPE (name
) == Lisp_Buffer
)
153 CHECK_STRING (name
, 0);
155 return Fcdr (Fassoc (name
, Vbuffer_alist
));
158 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
159 "Return the buffer visiting file FILENAME (a string).\n\
160 If there is no such live buffer, return nil.")
162 register Lisp_Object filename
;
164 register Lisp_Object tail
, buf
, tem
;
165 CHECK_STRING (filename
, 0);
166 filename
= Fexpand_file_name (filename
, Qnil
);
168 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
170 buf
= Fcdr (XCONS (tail
)->car
);
171 if (XTYPE (buf
) != Lisp_Buffer
) continue;
172 if (XTYPE (XBUFFER (buf
)->filename
) != Lisp_String
) continue;
173 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
180 /* Incremented for each buffer created, to assign the buffer number. */
183 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
184 "Return the buffer named NAME, or create such a buffer and return it.\n\
185 A new buffer is created if there is no live buffer named NAME.\n\
186 If NAME starts with a space, the new buffer does not keep undo information.\n\
187 If NAME is a buffer instead of a string, then it is the value returned.\n\
188 The value is never nil.")
190 register Lisp_Object name
;
192 register Lisp_Object buf
, function
, tem
;
193 int count
= specpdl_ptr
- specpdl
;
194 register struct buffer
*b
;
196 buf
= Fget_buffer (name
);
200 b
= (struct buffer
*) malloc (sizeof (struct buffer
));
204 BUF_GAP_SIZE (b
) = 20;
205 BUFFER_ALLOC (BUF_BEG_ADDR (b
), BUF_GAP_SIZE (b
));
206 if (! BUF_BEG_ADDR (b
))
216 /* Put this on the chain of all buffers including killed ones. */
217 b
->next
= all_buffers
;
220 b
->mark
= Fmake_marker ();
221 /*b->number = make_number (++buffer_count);*/
223 if (XSTRING (name
)->data
[0] != ' ')
230 /* Put this in the alist of all live buffers. */
231 XSET (buf
, Lisp_Buffer
, b
);
232 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
234 b
->mark
= Fmake_marker ();
238 function
= buffer_defaults
.major_mode
;
241 tem
= Fget (current_buffer
->major_mode
, Qmode_class
);
243 function
= current_buffer
->major_mode
;
246 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
249 /* To select a nonfundamental mode,
250 select the buffer temporarily and then call the mode function. */
252 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
257 return unbind_to (count
, buf
);
260 /* Reinitialize everything about a buffer except its name and contents. */
264 register struct buffer
*b
;
267 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
269 b
->save_modified
= 1;
270 XFASTINT (b
->save_length
) = 0;
271 b
->last_window_start
= 1;
273 b
->auto_save_modified
= 0;
274 b
->auto_save_file_name
= Qnil
;
276 b
->overlays_before
= Qnil
;
277 b
->overlays_after
= Qnil
;
278 XFASTINT (b
->overlay_center
) = 1;
280 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
281 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
283 reset_buffer_local_variables(b
);
286 reset_buffer_local_variables (b
)
287 register struct buffer
*b
;
291 /* Reset the major mode to Fundamental, together with all the
292 things that depend on the major mode.
293 default-major-mode is handled at a higher level.
294 We ignore it here. */
295 b
->major_mode
= Qfundamental_mode
;
297 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
298 b
->mode_name
= QSFundamental
;
299 b
->minor_modes
= Qnil
;
300 b
->downcase_table
= Vascii_downcase_table
;
301 b
->upcase_table
= Vascii_upcase_table
;
302 b
->case_canon_table
= Vascii_downcase_table
;
303 b
->case_eqv_table
= Vascii_upcase_table
;
304 b
->mark_active
= Qnil
;
306 b
->sort_table
= XSTRING (Vascii_sort_table
);
307 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
310 /* Reset all per-buffer variables to their defaults. */
311 b
->local_var_alist
= Qnil
;
312 b
->local_var_flags
= 0;
314 /* For each slot that has a default value,
315 copy that into the slot. */
317 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
318 offset
< sizeof (struct buffer
);
319 offset
+= sizeof (Lisp_Object
)) /* sizeof int == sizeof Lisp_Object */
320 if (*(int *)(offset
+ (char *) &buffer_local_flags
) > 0
321 || *(int *)(offset
+ (char *) &buffer_local_flags
) == -2)
322 *(Lisp_Object
*)(offset
+ (char *)b
) =
323 *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
326 /* We split this away from generate-new-buffer, because rename-buffer
327 and set-visited-file-name ought to be able to use this to really
328 rename the buffer properly. */
330 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
332 "Return a string that is the name of no existing buffer based on NAME.\n\
333 If there is no live buffer named NAME, then return NAME.\n\
334 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
335 until an unused name is found, and then return that name.")
337 register Lisp_Object name
;
339 register Lisp_Object gentemp
, tem
;
343 CHECK_STRING (name
, 0);
345 tem
= Fget_buffer (name
);
352 sprintf (number
, "<%d>", ++count
);
353 gentemp
= concat2 (name
, build_string (number
));
354 tem
= Fget_buffer (gentemp
);
361 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
362 "Return the name of BUFFER, as a string.\n\
363 With no argument or nil as argument, return the name of the current buffer.")
365 register Lisp_Object buffer
;
368 return current_buffer
->name
;
369 CHECK_BUFFER (buffer
, 0);
370 return XBUFFER (buffer
)->name
;
373 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
374 "Return name of file BUFFER is visiting, or nil if none.\n\
375 No argument or nil as argument means use the current buffer.")
377 register Lisp_Object buffer
;
380 return current_buffer
->filename
;
381 CHECK_BUFFER (buffer
, 0);
382 return XBUFFER (buffer
)->filename
;
385 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
386 Sbuffer_local_variables
, 0, 1, 0,
387 "Return an alist of variables that are buffer-local in BUFFER.\n\
388 Each element looks like (SYMBOL . VALUE) and describes one variable.\n\
389 Note that storing new VALUEs in these elements doesn't change the variables.\n\
390 No argument or nil as argument means use current buffer as BUFFER.")
392 register Lisp_Object buffer
;
394 register struct buffer
*buf
;
395 register Lisp_Object val
;
398 buf
= current_buffer
;
401 CHECK_BUFFER (buffer
, 0);
402 buf
= XBUFFER (buffer
);
406 /* Reference each variable in the alist in our current buffer.
407 If inquiring about the current buffer, this gets the current values,
408 so store them into the alist so the alist is up to date.
409 If inquiring about some other buffer, this swaps out any values
410 for that buffer, making the alist up to date automatically. */
411 register Lisp_Object tem
;
412 for (tem
= buf
->local_var_alist
; CONSP (tem
); tem
= XCONS (tem
)->cdr
)
414 Lisp_Object v1
= Fsymbol_value (XCONS (XCONS (tem
)->car
)->car
);
415 if (buf
== current_buffer
)
416 XCONS (XCONS (tem
)->car
)->cdr
= v1
;
420 /* Make a copy of the alist, to return it. */
421 val
= Fcopy_alist (buf
->local_var_alist
);
423 /* Add on all the variables stored in special slots. */
425 register int offset
, mask
;
427 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
428 offset
< sizeof (struct buffer
);
429 offset
+= (sizeof (int))) /* sizeof int == sizeof Lisp_Object */
431 mask
= *(int *)(offset
+ (char *) &buffer_local_flags
);
432 if (mask
== -1 || (buf
->local_var_flags
& mask
))
433 if (XTYPE (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
435 val
= Fcons (Fcons (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
),
436 *(Lisp_Object
*)(offset
+ (char *)buf
)),
444 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
446 "Return t if BUFFER was modified since its file was last read or saved.\n\
447 No argument or nil as argument means use current buffer as BUFFER.")
449 register Lisp_Object buffer
;
451 register struct buffer
*buf
;
453 buf
= current_buffer
;
456 CHECK_BUFFER (buffer
, 0);
457 buf
= XBUFFER (buffer
);
460 return buf
->save_modified
< BUF_MODIFF (buf
) ? Qt
: Qnil
;
463 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
465 "Mark current buffer as modified or unmodified according to FLAG.\n\
466 A non-nil FLAG means mark the buffer modified.")
468 register Lisp_Object flag
;
470 register int already
;
471 register Lisp_Object fn
;
473 #ifdef CLASH_DETECTION
474 /* If buffer becoming modified, lock the file.
475 If buffer becoming unmodified, unlock the file. */
477 fn
= current_buffer
->filename
;
480 already
= current_buffer
->save_modified
< MODIFF
;
481 if (!already
&& !NILP (flag
))
483 else if (already
&& NILP (flag
))
486 #endif /* CLASH_DETECTION */
488 current_buffer
->save_modified
= NILP (flag
) ? MODIFF
: 0;
493 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
495 "Return BUFFER's tick counter, incremented for each change in text.\n\
496 Each buffer has a tick counter which is incremented each time the text in\n\
497 that buffer is changed. It wraps around occasionally.\n\
498 No argument or nil as argument means use current buffer as BUFFER.")
500 register Lisp_Object buffer
;
502 register struct buffer
*buf
;
504 buf
= current_buffer
;
507 CHECK_BUFFER (buffer
, 0);
508 buf
= XBUFFER (buffer
);
511 return make_number (BUF_MODIFF (buf
));
514 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
515 "sRename buffer (to new name): \nP",
516 "Change current buffer's name to NEWNAME (a string).\n\
517 If second arg UNIQUE is nil or omitted, it is an error if a\n\
518 buffer named NEWNAME already exists.\n\
519 If UNIQUE is non-nil, come up with a new name using\n\
520 `generate-new-buffer-name'.\n\
521 Interactively, you can set UNIQUE with a prefix argument.\n\
522 We return the name we actually gave the buffer.\n\
523 This does not change the name of the visited file (if any).")
525 register Lisp_Object name
, unique
;
527 register Lisp_Object tem
, buf
;
529 CHECK_STRING (name
, 0);
530 tem
= Fget_buffer (name
);
531 if (XBUFFER (tem
) == current_buffer
)
532 return current_buffer
->name
;
536 name
= Fgenerate_new_buffer_name (name
);
538 error ("Buffer name \"%s\" is in use", XSTRING (name
)->data
);
541 current_buffer
->name
= name
;
543 /* Catch redisplay's attention. Unless we do this, the mode lines for
544 any windows displaying current_buffer will stay unchanged. */
547 XSET (buf
, Lisp_Buffer
, current_buffer
);
548 Fsetcar (Frassq (buf
, Vbuffer_alist
), name
);
549 if (NILP (current_buffer
->filename
) && !NILP (current_buffer
->auto_save_file_name
))
550 call0 (intern ("rename-auto-save-file"));
554 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 2, 0,
555 "Return most recently selected buffer other than BUFFER.\n\
556 Buffers not visible in windows are preferred to visible buffers,\n\
557 unless optional second argument VISIBLE-OK is non-nil.\n\
558 If no other buffer exists, the buffer `*scratch*' is returned.\n\
559 If BUFFER is omitted or nil, some interesting buffer is returned.")
561 register Lisp_Object buffer
, visible_ok
;
563 register Lisp_Object tail
, buf
, notsogood
, tem
;
566 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
568 buf
= Fcdr (Fcar (tail
));
569 if (EQ (buf
, buffer
))
571 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
573 if (NILP (visible_ok
))
574 tem
= Fget_buffer_window (buf
, Qnil
);
579 if (NILP (notsogood
))
582 if (!NILP (notsogood
))
584 return Fget_buffer_create (build_string ("*scratch*"));
587 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
, 1,1,
589 "Make BUFFER stop keeping undo information.")
591 register Lisp_Object buffer
;
593 Lisp_Object real_buffer
;
596 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
599 real_buffer
= Fget_buffer (buffer
);
600 if (NILP (real_buffer
))
604 XBUFFER (real_buffer
)->undo_list
= Qt
;
609 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
611 "Start keeping undo information for buffer BUFFER.\n\
612 No argument or nil as argument means do this for the current buffer.")
614 register Lisp_Object buffer
;
616 Lisp_Object real_buffer
;
619 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
622 real_buffer
= Fget_buffer (buffer
);
623 if (NILP (real_buffer
))
627 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
628 XBUFFER (real_buffer
)->undo_list
= Qnil
;
634 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
635 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
636 The buffer being killed will be current while the hook is running.\n\
639 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
640 "Kill the buffer BUFFER.\n\
641 The argument may be a buffer or may be the name of a buffer.\n\
642 An argument of nil means kill the current buffer.\n\n\
643 Value is t if the buffer is actually killed, nil if user says no.\n\n\
644 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
645 if not void, is a list of functions to be called, with no arguments,\n\
646 before the buffer is actually killed. The buffer to be killed is current\n\
647 when the hook functions are called.\n\n\
648 Any processes that have this buffer as the `process-buffer' are killed\n\
649 with `delete-process'.")
654 register struct buffer
*b
;
655 register Lisp_Object tem
;
656 register struct Lisp_Marker
*m
;
657 struct gcpro gcpro1
, gcpro2
;
660 buf
= Fcurrent_buffer ();
662 buf
= Fget_buffer (bufname
);
668 /* Query if the buffer is still modified. */
669 if (INTERACTIVE
&& !NILP (b
->filename
)
670 && BUF_MODIFF (b
) > b
->save_modified
)
672 GCPRO2 (buf
, bufname
);
673 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
674 XSTRING (b
->name
)->data
));
680 /* Run kill-buffer hook with the buffer to be killed the current buffer. */
682 register Lisp_Object val
;
683 int count
= specpdl_ptr
- specpdl
;
685 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
686 set_buffer_internal (b
);
687 call1 (Vrun_hooks
, Qkill_buffer_hook
);
688 unbind_to (count
, Qnil
);
691 /* We have no more questions to ask. Verify that it is valid
692 to kill the buffer. This must be done after the questions
693 since anything can happen within do_yes_or_no_p. */
695 /* Don't kill the minibuffer now current. */
696 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
702 /* Make this buffer not be current.
703 In the process, notice if this is the sole visible buffer
704 and give up if so. */
705 if (b
== current_buffer
)
707 tem
= Fother_buffer (buf
, Qnil
);
709 if (b
== current_buffer
)
713 /* Now there is no question: we can kill the buffer. */
715 #ifdef CLASH_DETECTION
716 /* Unlock this buffer's file, if it is locked. */
718 #endif /* CLASH_DETECTION */
720 kill_buffer_processes (buf
);
724 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
725 Freplace_buffer_in_windows (buf
);
728 /* Delete any auto-save file. */
729 if (XTYPE (b
->auto_save_file_name
) == Lisp_String
)
732 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
734 unlink (XSTRING (b
->auto_save_file_name
)->data
);
737 /* Unchain all markers of this buffer
738 and leave them pointing nowhere. */
739 for (tem
= b
->markers
; !EQ (tem
, Qnil
); )
748 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
749 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
750 /* Perhaps we should explicitly free the interval tree here... */
753 BUFFER_FREE (BUF_BEG_ADDR (b
));
759 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
760 we do this each time BUF is selected visibly, the more recently
761 selected buffers are always closer to the front of the list. This
762 means that other_buffer is more likely to choose a relevant buffer. */
767 register Lisp_Object link
, prev
;
770 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
772 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
777 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
778 we cannot use Fdelq itself here because it allows quitting. */
781 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
783 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
785 XCONS(link
)->cdr
= Vbuffer_alist
;
786 Vbuffer_alist
= link
;
789 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
790 "Select buffer BUFFER in the current window.\n\
791 BUFFER may be a buffer or a buffer name.\n\
792 Optional second arg NORECORD non-nil means\n\
793 do not put this buffer at the front of the list of recently selected ones.\n\
795 WARNING: This is NOT the way to work on another buffer temporarily\n\
796 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
797 the window-buffer correspondences.")
799 Lisp_Object bufname
, norecord
;
801 register Lisp_Object buf
;
804 if (EQ (minibuf_window
, selected_window
))
805 error ("Cannot switch buffers in minibuffer window");
806 tem
= Fwindow_dedicated_p (selected_window
);
808 error ("Cannot switch buffers in a dedicated window");
811 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
813 buf
= Fget_buffer_create (bufname
);
818 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
819 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
826 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 2, 0,
827 "Select buffer BUFFER in some window, preferably a different one.\n\
828 If BUFFER is nil, then some other buffer is chosen.\n\
829 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
830 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
831 window even if BUFFER is already visible in the selected window.")
833 Lisp_Object bufname
, other
;
835 register Lisp_Object buf
;
837 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
839 buf
= Fget_buffer_create (bufname
);
842 Fselect_window (Fdisplay_buffer (buf
, other
));
846 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
847 "Return the current buffer as a Lisp object.")
850 register Lisp_Object buf
;
851 XSET (buf
, Lisp_Buffer
, current_buffer
);
855 /* Set the current buffer to b */
858 set_buffer_internal (b
)
859 register struct buffer
*b
;
861 register struct buffer
*old_buf
;
862 register Lisp_Object tail
, valcontents
;
865 if (current_buffer
== b
)
868 windows_or_buffers_changed
= 1;
869 old_buf
= current_buffer
;
871 last_known_column_point
= -1; /* invalidate indentation cache */
873 /* Look down buffer's list of local Lisp variables
874 to find and update any that forward into C variables. */
876 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
878 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
879 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
880 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
881 && (tem
= XTYPE (XCONS (valcontents
)->car
),
882 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
883 || tem
== Lisp_Objfwd
)))
884 /* Just reference the variable
885 to cause it to become set for this buffer. */
886 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
889 /* Do the same with any others that were local to the previous buffer */
892 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
894 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
895 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
896 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
897 && (tem
= XTYPE (XCONS (valcontents
)->car
),
898 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
899 || tem
== Lisp_Objfwd
)))
900 /* Just reference the variable
901 to cause it to become set for this buffer. */
902 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
906 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
907 "Make the buffer BUFFER current for editing operations.\n\
908 BUFFER may be a buffer or the name of an existing buffer.\n\
909 See also `save-excursion' when you want to make a buffer current temporarily.\n\
910 This function does not display the buffer, so its effect ends\n\
911 when the current command terminates.\n\
912 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
914 register Lisp_Object bufname
;
916 register Lisp_Object buffer
;
917 buffer
= Fget_buffer (bufname
);
920 if (NILP (XBUFFER (buffer
)->name
))
921 error ("Selecting deleted buffer");
922 set_buffer_internal (XBUFFER (buffer
));
926 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
927 Sbarf_if_buffer_read_only
, 0, 0, 0,
928 "Signal a `buffer-read-only' error if the current buffer is read-only.")
931 while (!NILP (current_buffer
->read_only
))
932 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
936 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
937 "Put BUFFER at the end of the list of all buffers.\n\
938 There it is the least likely candidate for `other-buffer' to return;\n\
939 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
940 If BUFFER is nil or omitted, bury the current buffer.\n\
941 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
942 selected window if it is displayed there.")
944 register Lisp_Object buf
;
946 /* Figure out what buffer we're going to bury. */
949 XSET (buf
, Lisp_Buffer
, current_buffer
);
951 /* If we're burying the current buffer, unshow it. */
952 Fswitch_to_buffer (Fother_buffer (buf
, Qnil
), Qnil
);
958 buf1
= Fget_buffer (buf
);
964 /* Move buf to the end of the buffer list. */
966 register Lisp_Object aelt
, link
;
968 aelt
= Frassq (buf
, Vbuffer_alist
);
969 link
= Fmemq (aelt
, Vbuffer_alist
);
970 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
971 XCONS (link
)->cdr
= Qnil
;
972 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
978 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
979 "Delete the entire contents of the current buffer.\n\
980 Any clipping restriction in effect (see `narrow-to-region') is removed,\n\
981 so the buffer is truly empty after this.")
986 current_buffer
->last_window_start
= 1;
987 /* Prevent warnings, or suspension of auto saving, that would happen
988 if future size is less than past size. Use of erase-buffer
989 implies that the future text is not really related to the past text. */
990 XFASTINT (current_buffer
->save_length
) = 0;
994 validate_region (b
, e
)
995 register Lisp_Object
*b
, *e
;
999 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1000 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1002 if (XINT (*b
) > XINT (*e
))
1004 i
= XFASTINT (*b
); /* This is legit even if *b is < 0 */
1006 XFASTINT (*e
) = i
; /* because this is all we do with i. */
1009 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1010 && XINT (*e
) <= ZV
))
1011 args_out_of_range (*b
, *e
);
1015 list_buffers_1 (files
)
1018 register Lisp_Object tail
, tem
, buf
;
1019 Lisp_Object col1
, col2
, col3
, minspace
;
1020 register struct buffer
*old
= current_buffer
, *b
;
1021 int desired_point
= 0;
1022 Lisp_Object other_file_symbol
;
1024 other_file_symbol
= intern ("list-buffers-directory");
1026 XFASTINT (col1
) = 19;
1027 XFASTINT (col2
) = 25;
1028 XFASTINT (col3
) = 40;
1029 XFASTINT (minspace
) = 1;
1031 Fset_buffer (Vstandard_output
);
1033 tail
= intern ("Buffer-menu-mode");
1034 if (!EQ (tail
, current_buffer
->major_mode
)
1035 && (tem
= Ffboundp (tail
), !NILP (tem
)))
1037 Fbuffer_disable_undo (Vstandard_output
);
1038 current_buffer
->read_only
= Qnil
;
1041 MR Buffer Size Mode File\n\
1042 -- ------ ---- ---- ----\n", -1);
1044 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1046 buf
= Fcdr (Fcar (tail
));
1048 /* Don't mention the minibuffers. */
1049 if (XSTRING (b
->name
)->data
[0] == ' ')
1051 /* Optionally don't mention buffers that lack files. */
1052 if (!NILP (files
) && NILP (b
->filename
))
1054 /* Identify the current buffer. */
1056 desired_point
= point
;
1057 write_string (b
== old
? "." : " ", -1);
1058 /* Identify modified buffers */
1059 write_string (BUF_MODIFF (b
) > b
->save_modified
? "*" : " ", -1);
1060 write_string (NILP (b
->read_only
) ? " " : "% ", -1);
1061 Fprinc (b
->name
, Qnil
);
1062 Findent_to (col1
, make_number (2));
1063 XFASTINT (tem
) = BUF_Z (b
) - BUF_BEG (b
);
1065 Findent_to (col2
, minspace
);
1066 Fprinc (b
->mode_name
, Qnil
);
1067 Findent_to (col3
, minspace
);
1069 if (!NILP (b
->filename
))
1070 Fprinc (b
->filename
, Qnil
);
1073 /* No visited file; check local value of list-buffers-directory. */
1075 set_buffer_internal (b
);
1076 tem
= Fboundp (other_file_symbol
);
1079 tem
= Fsymbol_value (other_file_symbol
);
1080 Fset_buffer (Vstandard_output
);
1081 if (XTYPE (tem
) == Lisp_String
)
1085 Fset_buffer (Vstandard_output
);
1087 write_string ("\n", -1);
1090 current_buffer
->read_only
= Qt
;
1091 set_buffer_internal (old
);
1092 /* Foo. This doesn't work since temp_output_buffer_show sets point to 1
1094 XBUFFER (Vstandard_output)->text.pointloc = desired_point;
1099 DEFUN ("list-buffers", Flist_buffers
, Slist_buffers
, 0, 1, "P",
1100 "Display a list of names of existing buffers.\n\
1101 The list is displayed in a buffer named `*Buffer List*'.\n\
1102 Note that buffers with names starting with spaces are omitted.\n\
1103 Non-null optional arg FILES-ONLY means mention only file buffers.\n\
1105 The M column contains a * for buffers that are modified.\n\
1106 The R column contains a % for buffers that are read-only.")
1110 internal_with_output_to_temp_buffer ("*Buffer List*",
1111 list_buffers_1
, files
);
1115 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1117 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1118 Most local variable bindings are eliminated so that the default values\n\
1119 become effective once more. Also, the syntax table is set from\n\
1120 `standard-syntax-table', the local keymap is set to nil,\n\
1121 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1122 This function also forces redisplay of the mode line.\n\
1124 Every function to select a new major mode starts by\n\
1125 calling this function.\n\n\
1126 As a special exception, local variables whose names have\n\
1127 a non-nil `permanent-local' property are not eliminated by this function.")
1130 register Lisp_Object alist
, sym
, tem
;
1132 oalist
= current_buffer
->local_var_alist
;
1134 /* Make sure no local variables remain set up with this buffer
1135 for their current values. */
1137 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1139 sym
= XCONS (XCONS (alist
)->car
)->car
;
1141 /* Need not do anything if some other buffer's binding is now encached. */
1142 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
;
1143 if (XBUFFER (tem
) == current_buffer
)
1145 /* Symbol is set up for this buffer's old local value.
1146 Set it up for the current buffer with the default value. */
1148 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1149 XCONS (tem
)->car
= tem
;
1150 XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
= Fcurrent_buffer ();
1151 store_symval_forwarding (sym
, XCONS (XSYMBOL (sym
)->value
)->car
,
1156 /* Actually eliminate all local bindings of this buffer. */
1158 reset_buffer_local_variables (current_buffer
);
1160 /* Redisplay mode lines; we are changing major mode. */
1162 update_mode_lines
++;
1164 /* Any which are supposed to be permanent,
1165 make local again, with the same values they had. */
1167 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1169 sym
= XCONS (XCONS (alist
)->car
)->car
;
1170 tem
= Fget (sym
, Qpermanent_local
);
1173 Fmake_local_variable (sym
);
1174 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1178 /* Force mode-line redisplay. Useful here because all major mode
1179 commands call this function. */
1180 update_mode_lines
++;
1185 /* Find all the overlays in the current buffer that contain position POS.
1186 Return the number found, and store them in a vector in *VEC_PTR.
1187 Store in *LEN_PTR the size allocated for the vector.
1188 Store in *NEXT_PTR the next position after POS where an overlay starts.
1190 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1191 when this function is called. */
1194 overlays_at (pos
, vec_ptr
, len_ptr
, next_ptr
)
1196 Lisp_Object
**vec_ptr
;
1200 Lisp_Object tail
, overlay
, start
, end
, result
;
1203 Lisp_Object
*vec
= *vec_ptr
;
1207 for (tail
= current_buffer
->overlays_before
;
1209 tail
= XCONS (tail
)->cdr
)
1211 overlay
= XCONS (tail
)->car
;
1212 if (! OVERLAY_VALID (overlay
))
1215 start
= OVERLAY_START (overlay
);
1216 end
= OVERLAY_END (overlay
);
1217 if (OVERLAY_POSITION (end
) <= pos
)
1219 startpos
= OVERLAY_POSITION (start
);
1220 if (startpos
<= pos
)
1224 *len_ptr
= len
*= 2;
1225 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1228 vec
[idx
++] = overlay
;
1230 else if (startpos
< next
)
1234 for (tail
= current_buffer
->overlays_after
;
1236 tail
= XCONS (tail
)->cdr
)
1238 overlay
= XCONS (tail
)->car
;
1239 if (! OVERLAY_VALID (overlay
))
1242 start
= OVERLAY_START (overlay
);
1243 end
= OVERLAY_END (overlay
);
1244 startpos
= OVERLAY_POSITION (start
);
1247 if (startpos
< next
)
1251 if (OVERLAY_POSITION (end
) > pos
)
1255 *len_ptr
= len
*= 2;
1256 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1259 vec
[idx
++] = overlay
;
1267 /* Shift overlays in the current buffer's overlay lists,
1268 to center the lists at POS. */
1271 recenter_overlay_lists (pos
)
1274 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
1276 /* See if anything in overlays_before should move to overlays_after. */
1278 /* We don't strictly need prev in this loop; it should always be nil.
1279 But we use it for symmetry and in case that should cease to be true
1280 with some future change. */
1282 for (tail
= current_buffer
->overlays_before
;
1284 prev
= tail
, tail
= next
)
1286 next
= XCONS (tail
)->cdr
;
1287 overlay
= XCONS (tail
)->car
;
1289 /* If the overlay is not valid, get rid of it. */
1290 if (!OVERLAY_VALID (overlay
))
1292 /* Splice the cons cell TAIL out of overlays_before. */
1294 XCONS (prev
)->cdr
= next
;
1296 current_buffer
->overlays_before
= next
;
1301 beg
= OVERLAY_START (overlay
);
1302 end
= OVERLAY_END (overlay
);
1304 if (OVERLAY_POSITION (end
) > pos
)
1306 /* OVERLAY needs to be moved. */
1307 int where
= OVERLAY_POSITION (beg
);
1308 Lisp_Object other
, other_prev
;
1310 /* Splice the cons cell TAIL out of overlays_before. */
1312 XCONS (prev
)->cdr
= next
;
1314 current_buffer
->overlays_before
= next
;
1316 /* Search thru overlays_after for where to put it. */
1318 for (other
= current_buffer
->overlays_after
;
1320 other_prev
= other
, other
= XCONS (other
)->cdr
)
1322 Lisp_Object otherbeg
, otheroverlay
, follower
;
1325 otheroverlay
= XCONS (other
)->car
;
1326 if (! OVERLAY_VALID (otheroverlay
))
1329 otherbeg
= OVERLAY_START (otheroverlay
);
1330 if (OVERLAY_POSITION (otherbeg
) >= where
)
1334 /* Add TAIL to overlays_after before OTHER. */
1335 XCONS (tail
)->cdr
= other
;
1336 if (!NILP (other_prev
))
1337 XCONS (other_prev
)->cdr
= tail
;
1339 current_buffer
->overlays_after
= tail
;
1343 /* We've reached the things that should stay in overlays_before.
1344 All the rest of overlays_before must end even earlier,
1349 /* See if anything in overlays_after should be in overlays_before. */
1351 for (tail
= current_buffer
->overlays_after
;
1353 prev
= tail
, tail
= next
)
1355 next
= XCONS (tail
)->cdr
;
1356 overlay
= XCONS (tail
)->car
;
1358 /* If the overlay is not valid, get rid of it. */
1359 if (!OVERLAY_VALID (overlay
))
1361 /* Splice the cons cell TAIL out of overlays_after. */
1363 XCONS (prev
)->cdr
= next
;
1365 current_buffer
->overlays_after
= next
;
1370 beg
= OVERLAY_START (overlay
);
1371 end
= OVERLAY_END (overlay
);
1373 /* Stop looking, when we know that nothing further
1374 can possibly end before POS. */
1375 if (OVERLAY_POSITION (beg
) > pos
)
1378 if (OVERLAY_POSITION (end
) <= pos
)
1380 /* OVERLAY needs to be moved. */
1381 int where
= OVERLAY_POSITION (end
);
1382 Lisp_Object other
, other_prev
;
1384 /* Splice the cons cell TAIL out of overlays_after. */
1386 XCONS (prev
)->cdr
= next
;
1388 current_buffer
->overlays_after
= next
;
1390 /* Search thru overlays_before for where to put it. */
1392 for (other
= current_buffer
->overlays_before
;
1394 other_prev
= other
, other
= XCONS (other
)->cdr
)
1396 Lisp_Object otherend
, otheroverlay
;
1399 otheroverlay
= XCONS (other
)->car
;
1400 if (! OVERLAY_VALID (otheroverlay
))
1403 otherend
= OVERLAY_END (otheroverlay
);
1404 if (OVERLAY_POSITION (otherend
) <= where
)
1408 /* Add TAIL to overlays_before before OTHER. */
1409 XCONS (tail
)->cdr
= other
;
1410 if (!NILP (other_prev
))
1411 XCONS (other_prev
)->cdr
= tail
;
1413 current_buffer
->overlays_before
= tail
;
1418 XFASTINT (current_buffer
->overlay_center
) = pos
;
1421 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 2, 0,
1422 "Create a new overlay in the current buffer, with range BEG to END.\n\
1423 BEG and END may be integers or markers.")
1425 Lisp_Object beg
, end
;
1427 Lisp_Object overlay
;
1429 if (MARKERP (beg
) && XBUFFER (Fmarker_buffer (beg
)) != current_buffer
)
1430 error ("Marker points into wrong buffer");
1431 if (MARKERP (end
) && XBUFFER (Fmarker_buffer (end
)) != current_buffer
)
1432 error ("Marker points into wrong buffer");
1434 overlay
= Fcons (Fcons (Fcopy_marker (beg
), Fcopy_marker (end
)), Qnil
);
1436 /* Put the new overlay on the wrong list. */
1437 end
= OVERLAY_END (overlay
);
1438 if (OVERLAY_POSITION (end
) < XINT (current_buffer
->overlay_center
))
1439 current_buffer
->overlays_after
1440 = Fcons (overlay
, current_buffer
->overlays_after
);
1442 current_buffer
->overlays_before
1443 = Fcons (overlay
, current_buffer
->overlays_before
);
1445 /* This puts it in the right list, and in the right order. */
1446 recenter_overlay_lists (XINT (current_buffer
->overlay_center
));
1451 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 3, 0,
1452 "Set the endpoints of OVERLAY to BEG and END.")
1454 Lisp_Object overlay
, beg
, end
;
1456 if (!OVERLAY_VALID (overlay
))
1457 error ("Invalid overlay object");
1459 current_buffer
->overlays_before
1460 = Fdelq (overlay
, current_buffer
->overlays_before
);
1461 current_buffer
->overlays_after
1462 = Fdelq (overlay
, current_buffer
->overlays_after
);
1464 Fset_marker (OVERLAY_START (overlay
), beg
, Qnil
);
1465 Fset_marker (OVERLAY_END (overlay
), end
, Qnil
);
1467 /* Put the overlay on the wrong list. */
1468 end
= OVERLAY_END (overlay
);
1469 if (OVERLAY_POSITION (end
) < XINT (current_buffer
->overlay_center
))
1470 current_buffer
->overlays_after
1471 = Fcons (overlay
, current_buffer
->overlays_after
);
1473 current_buffer
->overlays_before
1474 = Fcons (overlay
, current_buffer
->overlays_before
);
1476 /* This puts it in the right list, and in the right order. */
1477 recenter_overlay_lists (XINT (current_buffer
->overlay_center
));
1482 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
1483 "Delete the overlay OVERLAY from the current buffer.")
1486 current_buffer
->overlays_before
1487 = Fdelq (overlay
, current_buffer
->overlays_before
);
1488 current_buffer
->overlays_after
1489 = Fdelq (overlay
, current_buffer
->overlays_after
);
1493 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
1494 "Return a list of the overays that contain position POS.")
1500 Lisp_Object
*overlay_vec
;
1504 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1507 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1509 /* Put all the overlays we want in a vector in overlay_vec.
1510 Store the length in len. */
1511 noverlays
= overlays_at (XINT (pos
), &overlay_vec
, &len
, &endpos
);
1513 /* Make a list of them all. */
1514 result
= Flist (noverlays
, overlay_vec
);
1520 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
1522 "Return the next position after POS where an overlay starts or ends.")
1528 Lisp_Object
*overlay_vec
;
1533 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1536 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1538 /* Put all the overlays we want in a vector in overlay_vec.
1539 Store the length in len.
1540 endpos gets the position where the next overlay starts. */
1541 noverlays
= overlays_at (XINT (pos
), &overlay_vec
, &len
, &endpos
);
1543 /* If any of these overlays ends before endpos,
1544 use its ending point instead. */
1545 for (i
= 0; i
< noverlays
; i
++)
1550 oend
= OVERLAY_END (overlay_vec
[i
]);
1551 oendpos
= OVERLAY_POSITION (oend
);
1552 if (oendpos
< endpos
)
1557 return make_number (endpos
);
1560 /* These functions are for debugging overlays. */
1562 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
1563 "Return a pair of lists giving all the overlays of the current buffer.\n\
1564 The car has all the overlays before the overlay center;\n\
1565 the cdr has all the overlays before the overlay center.\n\
1566 Recentering overlays moves overlays between these lists.\n\
1567 The lists you get are copies, so that changing them has no effect.\n\
1568 However, the overlays you get are the real objects that the buffer uses.")
1571 Lisp_Object before
, after
;
1572 before
= current_buffer
->overlays_before
;
1574 before
= Fcopy_sequence (before
);
1575 after
= current_buffer
->overlays_after
;
1577 after
= Fcopy_sequence (after
);
1579 return Fcons (before
, after
);
1582 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
1583 "Recenter the overlays of the current buffer around position POS.")
1587 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1589 recenter_overlay_lists (XINT (pos
));
1593 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
1594 "Get the property of overlay OVERLAY with property name NAME.")
1596 Lisp_Object overlay
, prop
;
1599 for (plist
= Fcdr_safe (Fcdr_safe (overlay
));
1600 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
1601 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
1603 if (EQ (XCONS (plist
)->car
, prop
))
1604 return XCONS (XCONS (plist
)->cdr
)->car
;
1608 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
1609 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
1610 (overlay
, prop
, value
)
1611 Lisp_Object overlay
, prop
, value
;
1613 Lisp_Object plist
, tail
;
1615 plist
= Fcdr_safe (Fcdr_safe (overlay
));
1618 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
1619 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
1621 if (EQ (XCONS (tail
)->car
, prop
))
1622 return XCONS (XCONS (tail
)->cdr
)->car
= value
;
1625 if (! CONSP (XCONS (overlay
)->cdr
))
1626 XCONS (overlay
)->cdr
= Fcons (Qnil
, Qnil
);
1628 XCONS (XCONS (overlay
)->cdr
)->cdr
1629 = Fcons (prop
, Fcons (value
, plist
));
1634 /* Somebody has tried to store NEWVAL into the buffer-local slot with
1635 offset XUINT (valcontents), and NEWVAL has an unacceptable type. */
1637 buffer_slot_type_mismatch (valcontents
, newval
)
1638 Lisp_Object valcontents
, newval
;
1640 unsigned int offset
= XUINT (valcontents
);
1641 unsigned char *symbol_name
=
1642 (XSYMBOL (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
1646 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
1648 case Lisp_Int
: type_name
= "integers"; break;
1649 case Lisp_String
: type_name
= "strings"; break;
1650 case Lisp_Marker
: type_name
= "markers"; break;
1651 case Lisp_Symbol
: type_name
= "symbols"; break;
1652 case Lisp_Cons
: type_name
= "lists"; break;
1653 case Lisp_Vector
: type_name
= "vectors"; break;
1658 error ("only %s should be stored in the buffer-local variable %s",
1659 type_name
, symbol_name
);
1664 register Lisp_Object tem
;
1666 /* Make sure all markable slots in buffer_defaults
1667 are initialized reasonably, so mark_buffer won't choke. */
1668 reset_buffer (&buffer_defaults
);
1669 reset_buffer (&buffer_local_symbols
);
1670 XSET (Vbuffer_defaults
, Lisp_Buffer
, &buffer_defaults
);
1671 XSET (Vbuffer_local_symbols
, Lisp_Buffer
, &buffer_local_symbols
);
1673 /* Set up the default values of various buffer slots. */
1674 /* Must do these before making the first buffer! */
1676 /* real setup is done in loaddefs.el */
1677 buffer_defaults
.mode_line_format
= build_string ("%-");
1678 buffer_defaults
.abbrev_mode
= Qnil
;
1679 buffer_defaults
.overwrite_mode
= Qnil
;
1680 buffer_defaults
.case_fold_search
= Qt
;
1681 buffer_defaults
.auto_fill_function
= Qnil
;
1682 buffer_defaults
.selective_display
= Qnil
;
1684 buffer_defaults
.selective_display_ellipses
= Qt
;
1686 buffer_defaults
.abbrev_table
= Qnil
;
1687 buffer_defaults
.display_table
= Qnil
;
1688 buffer_defaults
.undo_list
= Qnil
;
1689 buffer_defaults
.mark_active
= Qnil
;
1690 buffer_defaults
.overlays_before
= Qnil
;
1691 buffer_defaults
.overlays_after
= Qnil
;
1692 XFASTINT (buffer_defaults
.overlay_center
) = 1;
1694 XFASTINT (buffer_defaults
.tab_width
) = 8;
1695 buffer_defaults
.truncate_lines
= Qnil
;
1696 buffer_defaults
.ctl_arrow
= Qt
;
1698 XFASTINT (buffer_defaults
.fill_column
) = 70;
1699 XFASTINT (buffer_defaults
.left_margin
) = 0;
1701 /* Assign the local-flags to the slots that have default values.
1702 The local flag is a bit that is used in the buffer
1703 to say that it has its own local value for the slot.
1704 The local flag bits are in the local_var_flags slot of the buffer. */
1706 /* Nothing can work if this isn't true */
1707 if (sizeof (int) != sizeof (Lisp_Object
)) abort ();
1709 /* 0 means not a lisp var, -1 means always local, else mask */
1710 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
1711 XFASTINT (buffer_local_flags
.filename
) = -1;
1712 XFASTINT (buffer_local_flags
.directory
) = -1;
1713 XFASTINT (buffer_local_flags
.backed_up
) = -1;
1714 XFASTINT (buffer_local_flags
.save_length
) = -1;
1715 XFASTINT (buffer_local_flags
.auto_save_file_name
) = -1;
1716 XFASTINT (buffer_local_flags
.read_only
) = -1;
1717 XFASTINT (buffer_local_flags
.major_mode
) = -1;
1718 XFASTINT (buffer_local_flags
.mode_name
) = -1;
1719 XFASTINT (buffer_local_flags
.undo_list
) = -1;
1720 XFASTINT (buffer_local_flags
.mark_active
) = -1;
1722 XFASTINT (buffer_local_flags
.mode_line_format
) = 1;
1723 XFASTINT (buffer_local_flags
.abbrev_mode
) = 2;
1724 XFASTINT (buffer_local_flags
.overwrite_mode
) = 4;
1725 XFASTINT (buffer_local_flags
.case_fold_search
) = 8;
1726 XFASTINT (buffer_local_flags
.auto_fill_function
) = 0x10;
1727 XFASTINT (buffer_local_flags
.selective_display
) = 0x20;
1729 XFASTINT (buffer_local_flags
.selective_display_ellipses
) = 0x40;
1731 XFASTINT (buffer_local_flags
.tab_width
) = 0x80;
1732 XFASTINT (buffer_local_flags
.truncate_lines
) = 0x100;
1733 XFASTINT (buffer_local_flags
.ctl_arrow
) = 0x200;
1734 XFASTINT (buffer_local_flags
.fill_column
) = 0x400;
1735 XFASTINT (buffer_local_flags
.left_margin
) = 0x800;
1736 XFASTINT (buffer_local_flags
.abbrev_table
) = 0x1000;
1737 XFASTINT (buffer_local_flags
.display_table
) = 0x2000;
1738 XFASTINT (buffer_local_flags
.syntax_table
) = 0x8000;
1740 Vbuffer_alist
= Qnil
;
1744 QSFundamental
= build_string ("Fundamental");
1746 Qfundamental_mode
= intern ("fundamental-mode");
1747 buffer_defaults
.major_mode
= Qfundamental_mode
;
1749 Qmode_class
= intern ("mode-class");
1751 Qprotected_field
= intern ("protected-field");
1753 Qpermanent_local
= intern ("permanent-local");
1755 Qkill_buffer_hook
= intern ("kill-buffer-hook");
1757 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
1758 /* super-magic invisible buffer */
1759 Vbuffer_alist
= Qnil
;
1761 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
1766 char buf
[MAXPATHLEN
+1];
1768 struct stat dotstat
, pwdstat
;
1770 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
1772 /* If PWD is accurate, use it instead of calling getwd. This is faster
1773 when PWD is right, and may avoid a fatal error. */
1774 if ((pwd
= getenv ("PWD")) != 0 && *pwd
== '/'
1775 && stat (pwd
, &pwdstat
) == 0
1776 && stat (".", &dotstat
) == 0
1777 && dotstat
.st_ino
== pwdstat
.st_ino
1778 && dotstat
.st_dev
== pwdstat
.st_dev
1779 && strlen (pwd
) < MAXPATHLEN
)
1781 else if (getwd (buf
) == 0)
1782 fatal ("`getwd' failed: %s.\n", buf
);
1785 /* Maybe this should really use some standard subroutine
1786 whose definition is filename syntax dependent. */
1787 if (buf
[strlen (buf
) - 1] != '/')
1789 #endif /* not VMS */
1790 current_buffer
->directory
= build_string (buf
);
1793 /* initialize the buffer routines */
1796 extern Lisp_Object Qdisabled
;
1798 staticpro (&Vbuffer_defaults
);
1799 staticpro (&Vbuffer_local_symbols
);
1800 staticpro (&Qfundamental_mode
);
1801 staticpro (&Qmode_class
);
1802 staticpro (&QSFundamental
);
1803 staticpro (&Vbuffer_alist
);
1804 staticpro (&Qprotected_field
);
1805 staticpro (&Qpermanent_local
);
1806 staticpro (&Qkill_buffer_hook
);
1808 Fput (Qprotected_field
, Qerror_conditions
,
1809 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
1810 Fput (Qprotected_field
, Qerror_message
,
1811 build_string ("Attempt to modify a protected field"));
1813 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
1815 /* All these use DEFVAR_LISP_NOPRO because the slots in
1816 buffer_defaults will all be marked via Vbuffer_defaults. */
1818 DEFVAR_LISP_NOPRO ("default-mode-line-format",
1819 &buffer_defaults
.mode_line_format
,
1820 "Default value of `mode-line-format' for buffers that don't override it.\n\
1821 This is the same as (default-value 'mode-line-format).");
1823 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
1824 &buffer_defaults
.abbrev_mode
,
1825 "Default value of `abbrev-mode' for buffers that do not override it.\n\
1826 This is the same as (default-value 'abbrev-mode).");
1828 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
1829 &buffer_defaults
.ctl_arrow
,
1830 "Default value of `ctl-arrow' for buffers that do not override it.\n\
1831 This is the same as (default-value 'ctl-arrow).");
1833 DEFVAR_LISP_NOPRO ("default-truncate-lines",
1834 &buffer_defaults
.truncate_lines
,
1835 "Default value of `truncate-lines' for buffers that do not override it.\n\
1836 This is the same as (default-value 'truncate-lines).");
1838 DEFVAR_LISP_NOPRO ("default-fill-column",
1839 &buffer_defaults
.fill_column
,
1840 "Default value of `fill-column' for buffers that do not override it.\n\
1841 This is the same as (default-value 'fill-column).");
1843 DEFVAR_LISP_NOPRO ("default-left-margin",
1844 &buffer_defaults
.left_margin
,
1845 "Default value of `left-margin' for buffers that do not override it.\n\
1846 This is the same as (default-value 'left-margin).");
1848 DEFVAR_LISP_NOPRO ("default-tab-width",
1849 &buffer_defaults
.tab_width
,
1850 "Default value of `tab-width' for buffers that do not override it.\n\
1851 This is the same as (default-value 'tab-width).");
1853 DEFVAR_LISP_NOPRO ("default-case-fold-search",
1854 &buffer_defaults
.case_fold_search
,
1855 "Default value of `case-fold-search' for buffers that don't override it.\n\
1856 This is the same as (default-value 'case-fold-search).");
1858 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
1861 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
1862 But make-docfile finds it!
1863 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
1865 "Template for displaying mode line for current buffer.\n\
1866 Each buffer has its own value of this variable.\n\
1867 Value may be a string, a symbol or a list or cons cell.\n\
1868 For a symbol, its value is used (but it is ignored if t or nil).\n\
1869 A string appearing directly as the value of a symbol is processed verbatim\n\
1870 in that the %-constructs below are not recognized.\n\
1871 For a list whose car is a symbol, the symbol's value is taken,\n\
1872 and if that is non-nil, the cadr of the list is processed recursively.\n\
1873 Otherwise, the caddr of the list (if there is one) is processed.\n\
1874 For a list whose car is a string or list, each element is processed\n\
1875 recursively and the results are effectively concatenated.\n\
1876 For a list whose car is an integer, the cdr of the list is processed\n\
1877 and padded (if the number is positive) or truncated (if negative)\n\
1878 to the width specified by that number.\n\
1879 A string is printed verbatim in the mode line except for %-constructs:\n\
1880 (%-constructs are allowed when the string is the entire mode-line-format\n\
1881 or when it is found in a cons-cell or a list)\n\
1882 %b -- print buffer name. %f -- print visited file name.\n\
1883 %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\
1884 %s -- print process status. %M -- print value of global-mode-string. (obs)\n\
1885 %p -- print percent of buffer above top of window, or top, bot or all.\n\
1886 %n -- print Narrow if appropriate.\n\
1887 %[ -- print one [ for each recursive editing level. %] similar.\n\
1888 %% -- print %. %- -- print infinitely many dashes.\n\
1889 Decimal digits after the % specify field width to which to pad.");
1892 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
1893 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
1894 nil here means use current buffer's major mode.");
1896 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
1897 make_number (Lisp_Symbol
),
1898 "Symbol for current buffer's major mode.");
1900 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
1901 make_number (Lisp_String
),
1902 "Pretty name of current buffer's major mode (a string).");
1904 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
1905 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
1906 Automatically becomes buffer-local when set in any fashion.");
1908 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
1910 "*Non-nil if searches should ignore case.\n\
1911 Automatically becomes buffer-local when set in any fashion.");
1913 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
1914 make_number (Lisp_Int
),
1915 "*Column beyond which automatic line-wrapping should happen.\n\
1916 Automatically becomes buffer-local when set in any fashion.");
1918 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
1919 make_number (Lisp_Int
),
1920 "*Column for the default indent-line-function to indent to.\n\
1921 Linefeed indents to this column in Fundamental mode.\n\
1922 Automatically becomes buffer-local when set in any fashion.");
1924 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
1925 make_number (Lisp_Int
),
1926 "*Distance between tab stops (for display of tab characters), in columns.\n\
1927 Automatically becomes buffer-local when set in any fashion.");
1929 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
1930 "*Non-nil means display control chars with uparrow.\n\
1931 Nil means use backslash and octal digits.\n\
1932 Automatically becomes buffer-local when set in any fashion.\n\
1933 This variable does not apply to characters whose display is specified\n\
1934 in the current display table (if there is one).");
1936 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
1937 "*Non-nil means do not display continuation lines;\n\
1938 give each line of text one screen line.\n\
1939 Automatically becomes buffer-local when set in any fashion.\n\
1941 Note that this is overridden by the variable\n\
1942 `truncate-partial-width-windows' if that variable is non-nil\n\
1943 and this buffer is not full-frame width.");
1945 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
1946 make_number (Lisp_String
),
1947 "Name of default directory of current buffer. Should end with slash.\n\
1948 Each buffer has its own value of this variable.");
1950 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
1952 "Function called (if non-nil) to perform auto-fill.\n\
1953 It is called after self-inserting a space at a column beyond `fill-column'.\n\
1954 Each buffer has its own value of this variable.\n\
1955 NOTE: This variable is not an ordinary hook;\n\
1956 It may not be a list of functions.");
1958 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
1959 make_number (Lisp_String
),
1960 "Name of file visited in current buffer, or nil if not visiting a file.\n\
1961 Each buffer has its own value of this variable.");
1963 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
1964 ¤t_buffer
->auto_save_file_name
,
1965 make_number (Lisp_String
),
1966 "Name of file for auto-saving current buffer,\n\
1967 or nil if buffer should not be auto-saved.\n\
1968 Each buffer has its own value of this variable.");
1970 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
1971 "Non-nil if this buffer is read-only.\n\
1972 Each buffer has its own value of this variable.");
1974 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
1975 "Non-nil if this buffer's file has been backed up.\n\
1976 Backing up is done before the first time the file is saved.\n\
1977 Each buffer has its own value of this variable.");
1979 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
1980 make_number (Lisp_Int
),
1981 "Length of current buffer when last read in, saved or auto-saved.\n\
1983 Each buffer has its own value of this variable.");
1985 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
1987 "Non-nil enables selective display:\n\
1988 Integer N as value means display only lines\n\
1989 that start with less than n columns of space.\n\
1990 A value of t means, after a ^M, all the rest of the line is invisible.\n\
1991 Then ^M's in the file are written into files as newlines.\n\n\
1992 Automatically becomes buffer-local when set in any fashion.");
1995 DEFVAR_PER_BUFFER ("selective-display-ellipses",
1996 ¤t_buffer
->selective_display_ellipses
,
1998 "t means display ... on previous line when a line is invisible.\n\
1999 Automatically becomes buffer-local when set in any fashion.");
2002 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
2003 "Non-nil if self-insertion should replace existing text.\n\
2004 If non-nil and not `overwrite-mode-binary', self-insertion still\n\
2005 inserts at the end of a line, and inserts when point is before a tab,\n\
2006 until the tab is filled in.\n\
2007 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
2008 Automatically becomes buffer-local when set in any fashion.");
2010 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2012 "Display table that controls display of the contents of current buffer.\n\
2013 Automatically becomes buffer-local when set in any fashion.\n\
2014 The display table is a vector created with `make-display-table'.\n\
2015 The first 256 elements control how to display each possible text character.\n\
2016 The value should be a \"rope\" (see `make-rope') or nil;\n\
2017 nil means display the character in the default fashion.\n\
2018 The remaining five elements are ropes that control the display of\n\
2019 the end of a truncated screen line (element 256);\n\
2020 the end of a continued line (element 257);\n\
2021 the escape character used to display character codes in octal (element 258);\n\
2022 the character used as an arrow for control characters (element 259);\n\
2023 the decoration indicating the presence of invisible lines (element 260).\n\
2024 If this variable is nil, the value of `standard-display-table' is used.\n\
2025 Each window can have its own, overriding display table.");
2027 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
2030 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
2031 "Function to call before each text change.\n\
2032 Two arguments are passed to the function: the positions of\n\
2033 the beginning and end of the range of old text to be changed.\n\
2034 \(For an insertion, the beginning and end are at the same place.)\n\
2035 No information is given about the length of the text after the change.\n\
2036 position of the change\n\
2038 While executing the `before-change-function', changes to buffers do not\n\
2039 cause calls to any `before-change-function' or `after-change-function'.");
2040 Vbefore_change_function
= Qnil
;
2042 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
2043 "Function to call after each text change.\n\
2044 Three arguments are passed to the function: the positions of\n\
2045 the beginning and end of the range of changed text,\n\
2046 and the length of the pre-change text replaced by that range.\n\
2047 \(For an insertion, the pre-change length is zero;\n\
2048 for a deletion, that length is the number of characters deleted,\n\
2049 and the post-change beginning and end are at the same place.)\n\
2051 While executing the `after-change-function', changes to buffers do not\n\
2052 cause calls to any `before-change-function' or `after-change-function'.");
2053 Vafter_change_function
= Qnil
;
2055 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
2056 "A list of functions to call before changing a buffer which is unmodified.\n\
2057 The functions are run using the `run-hooks' function.");
2058 Vfirst_change_hook
= Qnil
;
2059 Qfirst_change_hook
= intern ("first-change-hook");
2060 staticpro (&Qfirst_change_hook
);
2062 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2063 "List of undo entries in current buffer.\n\
2064 Recent changes come first; older changes follow newer.\n\
2066 An entry (START . END) represents an insertion which begins at\n\
2067 position START and ends at position END.\n\
2069 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
2070 from (abs POSITION). If POSITION is positive, point was at the front\n\
2071 of the text being deleted; if negative, point was at the end.\n\
2073 An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\
2074 previously unmodified. HIGHWORD and LOWWORD are the high and low\n\
2075 16-bit words of the buffer's modification count at the time. If the\n\
2076 modification count of the most recent save is different, this entry is\n\
2079 An entry (nil PROP VAL BEG . END) indicates that a text property\n\
2080 was modified between BEG and END. PROP is the property name,\n\
2081 and VAL is the old value.\n\
2083 An entry of the form POSITION indicates that point was at the buffer\n\
2084 location given by the integer. Undoing an entry of this form places\n\
2085 point at POSITION.\n\
2087 nil marks undo boundaries. The undo command treats the changes\n\
2088 between two undo boundaries as a single step to be undone.\n\
2090 If the value of the variable is t, undo information is not recorded.");
2092 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
2093 "Non-nil means the mark and region are currently active in this buffer.\n\
2094 Automatically local in all buffers.");
2096 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
2097 "*Non-nil means deactivate the mark when the buffer contents change.");
2098 Vtransient_mark_mode
= Qnil
;
2100 defsubr (&Sbuffer_list
);
2101 defsubr (&Sget_buffer
);
2102 defsubr (&Sget_file_buffer
);
2103 defsubr (&Sget_buffer_create
);
2104 defsubr (&Sgenerate_new_buffer_name
);
2105 defsubr (&Sbuffer_name
);
2106 /*defsubr (&Sbuffer_number);*/
2107 defsubr (&Sbuffer_file_name
);
2108 defsubr (&Sbuffer_local_variables
);
2109 defsubr (&Sbuffer_modified_p
);
2110 defsubr (&Sset_buffer_modified_p
);
2111 defsubr (&Sbuffer_modified_tick
);
2112 defsubr (&Srename_buffer
);
2113 defsubr (&Sother_buffer
);
2114 defsubr (&Sbuffer_disable_undo
);
2115 defsubr (&Sbuffer_enable_undo
);
2116 defsubr (&Skill_buffer
);
2117 defsubr (&Serase_buffer
);
2118 defsubr (&Sswitch_to_buffer
);
2119 defsubr (&Spop_to_buffer
);
2120 defsubr (&Scurrent_buffer
);
2121 defsubr (&Sset_buffer
);
2122 defsubr (&Sbarf_if_buffer_read_only
);
2123 defsubr (&Sbury_buffer
);
2124 defsubr (&Slist_buffers
);
2125 defsubr (&Skill_all_local_variables
);
2127 defsubr (&Smake_overlay
);
2128 defsubr (&Sdelete_overlay
);
2129 defsubr (&Smove_overlay
);
2130 defsubr (&Soverlays_at
);
2131 defsubr (&Snext_overlay_change
);
2132 defsubr (&Soverlay_recenter
);
2133 defsubr (&Soverlay_lists
);
2134 defsubr (&Soverlay_get
);
2135 defsubr (&Soverlay_put
);
2140 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
2141 initial_define_key (control_x_map
, 'k', "kill-buffer");
2142 initial_define_key (control_x_map
, Ctl ('B'), "list-buffers");