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 If there is no such live buffer, return nil.")
186 register Lisp_Object filename
;
188 register Lisp_Object tail
, buf
, tem
;
191 CHECK_STRING (filename
, 0);
192 filename
= Fexpand_file_name (filename
, Qnil
);
194 /* If the file name has special constructs in it,
195 call the corresponding file handler. */
196 handler
= Ffind_file_name_handler (filename
);
198 return call2 (handler
, Qget_file_buffer
, filename
);
200 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
202 buf
= Fcdr (XCONS (tail
)->car
);
203 if (XTYPE (buf
) != Lisp_Buffer
) continue;
204 if (XTYPE (XBUFFER (buf
)->filename
) != Lisp_String
) continue;
205 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
212 /* Incremented for each buffer created, to assign the buffer number. */
215 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
216 "Return the buffer named NAME, or create such a buffer and return it.\n\
217 A new buffer is created if there is no live buffer named NAME.\n\
218 If NAME starts with a space, the new buffer does not keep undo information.\n\
219 If NAME is a buffer instead of a string, then it is the value returned.\n\
220 The value is never nil.")
222 register Lisp_Object name
;
224 register Lisp_Object buf
, function
, tem
;
225 int count
= specpdl_ptr
- specpdl
;
226 register struct buffer
*b
;
228 buf
= Fget_buffer (name
);
232 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
234 BUF_GAP_SIZE (b
) = 20;
236 BUFFER_ALLOC (BUF_BEG_ADDR (b
), BUF_GAP_SIZE (b
));
238 if (! BUF_BEG_ADDR (b
))
248 /* Put this on the chain of all buffers including killed ones. */
249 b
->next
= all_buffers
;
252 b
->mark
= Fmake_marker ();
253 /*b->number = make_number (++buffer_count);*/
255 if (XSTRING (name
)->data
[0] != ' ')
262 /* Put this in the alist of all live buffers. */
263 XSET (buf
, Lisp_Buffer
, b
);
264 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
266 b
->mark
= Fmake_marker ();
270 function
= buffer_defaults
.major_mode
;
273 tem
= Fget (current_buffer
->major_mode
, Qmode_class
);
275 function
= current_buffer
->major_mode
;
278 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
281 /* To select a nonfundamental mode,
282 select the buffer temporarily and then call the mode function. */
284 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
289 return unbind_to (count
, buf
);
292 /* Reinitialize everything about a buffer except its name and contents. */
296 register struct buffer
*b
;
299 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
301 b
->save_modified
= 1;
302 XFASTINT (b
->save_length
) = 0;
303 b
->last_window_start
= 1;
305 b
->auto_save_modified
= 0;
306 b
->auto_save_file_name
= Qnil
;
308 b
->overlays_before
= Qnil
;
309 b
->overlays_after
= Qnil
;
310 XFASTINT (b
->overlay_center
) = 1;
311 b
->mark_active
= Qnil
;
313 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
314 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
316 reset_buffer_local_variables(b
);
319 reset_buffer_local_variables (b
)
320 register struct buffer
*b
;
324 /* Reset the major mode to Fundamental, together with all the
325 things that depend on the major mode.
326 default-major-mode is handled at a higher level.
327 We ignore it here. */
328 b
->major_mode
= Qfundamental_mode
;
330 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
331 b
->mode_name
= QSFundamental
;
332 b
->minor_modes
= Qnil
;
333 b
->downcase_table
= Vascii_downcase_table
;
334 b
->upcase_table
= Vascii_upcase_table
;
335 b
->case_canon_table
= Vascii_downcase_table
;
336 b
->case_eqv_table
= Vascii_upcase_table
;
338 b
->sort_table
= XSTRING (Vascii_sort_table
);
339 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
342 /* Reset all per-buffer variables to their defaults. */
343 b
->local_var_alist
= Qnil
;
344 b
->local_var_flags
= 0;
346 /* For each slot that has a default value,
347 copy that into the slot. */
349 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
350 offset
< sizeof (struct buffer
);
351 offset
+= sizeof (Lisp_Object
)) /* sizeof int == sizeof Lisp_Object */
352 if (*(int *)(offset
+ (char *) &buffer_local_flags
) > 0
353 || *(int *)(offset
+ (char *) &buffer_local_flags
) == -2)
354 *(Lisp_Object
*)(offset
+ (char *)b
) =
355 *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
358 /* We split this away from generate-new-buffer, because rename-buffer
359 and set-visited-file-name ought to be able to use this to really
360 rename the buffer properly. */
362 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
364 "Return a string that is the name of no existing buffer based on NAME.\n\
365 If there is no live buffer named NAME, then return NAME.\n\
366 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
367 until an unused name is found, and then return that name.\n\
368 Optional second argument IGNORE specifies a name that is okay to use\n\
369 \(if it is in the sequence to be tried)\n\
370 even if a buffer with that name exists.")
372 register Lisp_Object name
, ignore
;
374 register Lisp_Object gentemp
, tem
;
378 CHECK_STRING (name
, 0);
380 tem
= Fget_buffer (name
);
387 sprintf (number
, "<%d>", ++count
);
388 gentemp
= concat2 (name
, build_string (number
));
389 tem
= Fstring_equal (gentemp
, ignore
);
392 tem
= Fget_buffer (gentemp
);
399 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
400 "Return the name of BUFFER, as a string.\n\
401 With no argument or nil as argument, return the name of the current buffer.")
403 register Lisp_Object buffer
;
406 return current_buffer
->name
;
407 CHECK_BUFFER (buffer
, 0);
408 return XBUFFER (buffer
)->name
;
411 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
412 "Return name of file BUFFER is visiting, or nil if none.\n\
413 No argument or nil as argument means use the current buffer.")
415 register Lisp_Object buffer
;
418 return current_buffer
->filename
;
419 CHECK_BUFFER (buffer
, 0);
420 return XBUFFER (buffer
)->filename
;
423 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
424 Sbuffer_local_variables
, 0, 1, 0,
425 "Return an alist of variables that are buffer-local in BUFFER.\n\
426 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
427 For a symbol that is locally unbound, just the symbol appears in the value.\n\
428 Note that storing new VALUEs in these elements doesn't change the variables.\n\
429 No argument or nil as argument means use current buffer as BUFFER.")
431 register Lisp_Object buffer
;
433 register struct buffer
*buf
;
434 register Lisp_Object result
;
437 buf
= current_buffer
;
440 CHECK_BUFFER (buffer
, 0);
441 buf
= XBUFFER (buffer
);
447 /* Reference each variable in the alist in our current buffer.
448 If inquiring about the current buffer, this gets the current values,
449 so store them into the alist so the alist is up to date.
450 If inquiring about some other buffer, this swaps out any values
451 for that buffer, making the alist up to date automatically. */
452 register Lisp_Object tail
;
453 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
455 Lisp_Object val
, elt
;
457 elt
= XCONS (tail
)->car
;
459 if (buf
== current_buffer
)
460 val
= find_symbol_value (XCONS (elt
)->car
);
462 val
= XCONS (elt
)->cdr
;
464 /* If symbol is unbound, put just the symbol in the list. */
465 if (EQ (val
, Qunbound
))
466 result
= Fcons (XCONS (elt
)->car
, result
);
467 /* Otherwise, put (symbol . value) in the list. */
469 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
473 /* Add on all the variables stored in special slots. */
475 register int offset
, mask
;
477 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
478 offset
< sizeof (struct buffer
);
479 offset
+= (sizeof (int))) /* sizeof int == sizeof Lisp_Object */
481 mask
= *(int *)(offset
+ (char *) &buffer_local_flags
);
482 if (mask
== -1 || (buf
->local_var_flags
& mask
))
483 if (XTYPE (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
485 result
= Fcons (Fcons (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
),
486 *(Lisp_Object
*)(offset
+ (char *)buf
)),
495 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
497 "Return t if BUFFER was modified since its file was last read or saved.\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 buf
->save_modified
< BUF_MODIFF (buf
) ? Qt
: Qnil
;
514 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
516 "Mark current buffer as modified or unmodified according to FLAG.\n\
517 A non-nil FLAG means mark the buffer modified.")
519 register Lisp_Object flag
;
521 register int already
;
522 register Lisp_Object fn
;
524 #ifdef CLASH_DETECTION
525 /* If buffer becoming modified, lock the file.
526 If buffer becoming unmodified, unlock the file. */
528 fn
= current_buffer
->filename
;
531 already
= current_buffer
->save_modified
< MODIFF
;
532 if (!already
&& !NILP (flag
))
534 else if (already
&& NILP (flag
))
537 #endif /* CLASH_DETECTION */
539 current_buffer
->save_modified
= NILP (flag
) ? MODIFF
: 0;
544 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
546 "Return BUFFER's tick counter, incremented for each change in text.\n\
547 Each buffer has a tick counter which is incremented each time the text in\n\
548 that buffer is changed. It wraps around occasionally.\n\
549 No argument or nil as argument means use current buffer as BUFFER.")
551 register Lisp_Object buffer
;
553 register struct buffer
*buf
;
555 buf
= current_buffer
;
558 CHECK_BUFFER (buffer
, 0);
559 buf
= XBUFFER (buffer
);
562 return make_number (BUF_MODIFF (buf
));
565 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
566 "sRename buffer (to new name): \nP",
567 "Change current buffer's name to NEWNAME (a string).\n\
568 If second arg UNIQUE is nil or omitted, it is an error if a\n\
569 buffer named NEWNAME already exists.\n\
570 If UNIQUE is non-nil, come up with a new name using\n\
571 `generate-new-buffer-name'.\n\
572 Interactively, you can set UNIQUE with a prefix argument.\n\
573 We return the name we actually gave the buffer.\n\
574 This does not change the name of the visited file (if any).")
576 register Lisp_Object name
, unique
;
578 register Lisp_Object tem
, buf
;
580 CHECK_STRING (name
, 0);
581 tem
= Fget_buffer (name
);
582 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
583 the buffer automatically so you can create another with the original name.
584 It makes UNIQUE equivalent to
585 (rename-buffer (generate-new-buffer-name NAME)). */
586 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
587 return current_buffer
->name
;
591 name
= Fgenerate_new_buffer_name (name
, current_buffer
->name
);
593 error ("Buffer name \"%s\" is in use", XSTRING (name
)->data
);
596 current_buffer
->name
= name
;
598 /* Catch redisplay's attention. Unless we do this, the mode lines for
599 any windows displaying current_buffer will stay unchanged. */
602 XSET (buf
, Lisp_Buffer
, current_buffer
);
603 Fsetcar (Frassq (buf
, Vbuffer_alist
), name
);
604 if (NILP (current_buffer
->filename
) && !NILP (current_buffer
->auto_save_file_name
))
605 call0 (intern ("rename-auto-save-file"));
609 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 2, 0,
610 "Return most recently selected buffer other than BUFFER.\n\
611 Buffers not visible in windows are preferred to visible buffers,\n\
612 unless optional second argument VISIBLE-OK is non-nil.\n\
613 If no other buffer exists, the buffer `*scratch*' is returned.\n\
614 If BUFFER is omitted or nil, some interesting buffer is returned.")
616 register Lisp_Object buffer
, visible_ok
;
618 register Lisp_Object tail
, buf
, notsogood
, tem
;
621 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
623 buf
= Fcdr (Fcar (tail
));
624 if (EQ (buf
, buffer
))
626 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
628 if (NILP (visible_ok
))
629 tem
= Fget_buffer_window (buf
, Qt
);
634 if (NILP (notsogood
))
637 if (!NILP (notsogood
))
639 return Fget_buffer_create (build_string ("*scratch*"));
642 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
, 0, 1,
644 "Make BUFFER stop keeping undo information.\n\
645 No argument or nil as argument means do this for the current buffer.")
647 register Lisp_Object buffer
;
649 Lisp_Object real_buffer
;
652 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
655 real_buffer
= Fget_buffer (buffer
);
656 if (NILP (real_buffer
))
660 XBUFFER (real_buffer
)->undo_list
= Qt
;
665 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
667 "Start keeping undo information for buffer BUFFER.\n\
668 No argument or nil as argument means do this for the current buffer.")
670 register Lisp_Object buffer
;
672 Lisp_Object real_buffer
;
675 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
678 real_buffer
= Fget_buffer (buffer
);
679 if (NILP (real_buffer
))
683 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
684 XBUFFER (real_buffer
)->undo_list
= Qnil
;
690 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
691 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
692 The buffer being killed will be current while the hook is running.\n\
695 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
696 "Kill the buffer BUFFER.\n\
697 The argument may be a buffer or may be the name of a buffer.\n\
698 An argument of nil means kill the current buffer.\n\n\
699 Value is t if the buffer is actually killed, nil if user says no.\n\n\
700 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
701 if not void, is a list of functions to be called, with no arguments,\n\
702 before the buffer is actually killed. The buffer to be killed is current\n\
703 when the hook functions are called.\n\n\
704 Any processes that have this buffer as the `process-buffer' are killed\n\
705 with `delete-process'.")
710 register struct buffer
*b
;
711 register Lisp_Object tem
;
712 register struct Lisp_Marker
*m
;
713 struct gcpro gcpro1
, gcpro2
;
716 buf
= Fcurrent_buffer ();
718 buf
= Fget_buffer (bufname
);
724 /* Query if the buffer is still modified. */
725 if (INTERACTIVE
&& !NILP (b
->filename
)
726 && BUF_MODIFF (b
) > b
->save_modified
)
728 GCPRO2 (buf
, bufname
);
729 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
730 XSTRING (b
->name
)->data
));
736 /* Run hooks with the buffer to be killed the current buffer. */
738 register Lisp_Object val
;
739 int count
= specpdl_ptr
- specpdl
;
742 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
743 set_buffer_internal (b
);
745 /* First run the query functions; if any query is answered no,
746 don't kill the buffer. */
747 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
749 tem
= call0 (Fcar (list
));
751 return unbind_to (count
, Qnil
);
754 /* Then run the hooks. */
755 call1 (Vrun_hooks
, Qkill_buffer_hook
);
756 unbind_to (count
, Qnil
);
759 /* We have no more questions to ask. Verify that it is valid
760 to kill the buffer. This must be done after the questions
761 since anything can happen within do_yes_or_no_p. */
763 /* Don't kill the minibuffer now current. */
764 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
770 /* Make this buffer not be current.
771 In the process, notice if this is the sole visible buffer
772 and give up if so. */
773 if (b
== current_buffer
)
775 tem
= Fother_buffer (buf
, Qnil
);
777 if (b
== current_buffer
)
781 /* Now there is no question: we can kill the buffer. */
783 #ifdef CLASH_DETECTION
784 /* Unlock this buffer's file, if it is locked. */
786 #endif /* CLASH_DETECTION */
788 kill_buffer_processes (buf
);
792 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
793 Freplace_buffer_in_windows (buf
);
796 /* Delete any auto-save file. */
797 if (XTYPE (b
->auto_save_file_name
) == Lisp_String
)
800 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
802 unlink (XSTRING (b
->auto_save_file_name
)->data
);
805 /* Unchain all markers of this buffer
806 and leave them pointing nowhere. */
807 for (tem
= b
->markers
; !EQ (tem
, Qnil
); )
816 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
817 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
818 /* Perhaps we should explicitly free the interval tree here... */
822 BUFFER_FREE (BUF_BEG_ADDR (b
));
829 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
830 we do this each time BUF is selected visibly, the more recently
831 selected buffers are always closer to the front of the list. This
832 means that other_buffer is more likely to choose a relevant buffer. */
837 register Lisp_Object link
, prev
;
840 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
842 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
847 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
848 we cannot use Fdelq itself here because it allows quitting. */
851 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
853 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
855 XCONS(link
)->cdr
= Vbuffer_alist
;
856 Vbuffer_alist
= link
;
859 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
860 "Select buffer BUFFER in the current window.\n\
861 BUFFER may be a buffer or a buffer name.\n\
862 Optional second arg NORECORD non-nil means\n\
863 do not put this buffer at the front of the list of recently selected ones.\n\
865 WARNING: This is NOT the way to work on another buffer temporarily\n\
866 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
867 the window-buffer correspondences.")
869 Lisp_Object bufname
, norecord
;
871 register Lisp_Object buf
;
874 if (EQ (minibuf_window
, selected_window
))
875 error ("Cannot switch buffers in minibuffer window");
876 tem
= Fwindow_dedicated_p (selected_window
);
878 error ("Cannot switch buffers in a dedicated window");
881 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
883 buf
= Fget_buffer_create (bufname
);
888 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
889 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
896 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 2, 0,
897 "Select buffer BUFFER in some window, preferably a different one.\n\
898 If BUFFER is nil, then some other buffer is chosen.\n\
899 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
900 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
901 window even if BUFFER is already visible in the selected window.")
903 Lisp_Object bufname
, other
;
905 register Lisp_Object buf
;
907 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
909 buf
= Fget_buffer_create (bufname
);
912 Fselect_window (Fdisplay_buffer (buf
, other
));
916 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
917 "Return the current buffer as a Lisp object.")
920 register Lisp_Object buf
;
921 XSET (buf
, Lisp_Buffer
, current_buffer
);
925 /* Set the current buffer to b */
928 set_buffer_internal (b
)
929 register struct buffer
*b
;
931 register struct buffer
*old_buf
;
932 register Lisp_Object tail
, valcontents
;
935 if (current_buffer
== b
)
938 windows_or_buffers_changed
= 1;
939 old_buf
= current_buffer
;
941 last_known_column_point
= -1; /* invalidate indentation cache */
943 /* Look down buffer's list of local Lisp variables
944 to find and update any that forward into C variables. */
946 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
948 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
949 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
950 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
951 && (tem
= XTYPE (XCONS (valcontents
)->car
),
952 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
953 || tem
== Lisp_Objfwd
)))
954 /* Just reference the variable
955 to cause it to become set for this buffer. */
956 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
959 /* Do the same with any others that were local to the previous buffer */
962 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
964 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
965 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
966 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
967 && (tem
= XTYPE (XCONS (valcontents
)->car
),
968 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
969 || tem
== Lisp_Objfwd
)))
970 /* Just reference the variable
971 to cause it to become set for this buffer. */
972 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
976 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
977 "Make the buffer BUFFER current for editing operations.\n\
978 BUFFER may be a buffer or the name of an existing buffer.\n\
979 See also `save-excursion' when you want to make a buffer current temporarily.\n\
980 This function does not display the buffer, so its effect ends\n\
981 when the current command terminates.\n\
982 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
984 register Lisp_Object bufname
;
986 register Lisp_Object buffer
;
987 buffer
= Fget_buffer (bufname
);
990 if (NILP (XBUFFER (buffer
)->name
))
991 error ("Selecting deleted buffer");
992 set_buffer_internal (XBUFFER (buffer
));
996 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
997 Sbarf_if_buffer_read_only
, 0, 0, 0,
998 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1001 if (!NILP (current_buffer
->read_only
)
1002 && NILP (Vinhibit_read_only
))
1003 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1007 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1008 "Put BUFFER at the end of the list of all buffers.\n\
1009 There it is the least likely candidate for `other-buffer' to return;\n\
1010 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1011 If BUFFER is nil or omitted, bury the current buffer.\n\
1012 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1013 selected window if it is displayed there.")
1015 register Lisp_Object buf
;
1017 /* Figure out what buffer we're going to bury. */
1020 XSET (buf
, Lisp_Buffer
, current_buffer
);
1022 /* If we're burying the current buffer, unshow it. */
1023 Fswitch_to_buffer (Fother_buffer (buf
, Qnil
), Qnil
);
1029 buf1
= Fget_buffer (buf
);
1035 /* Move buf to the end of the buffer list. */
1037 register Lisp_Object aelt
, link
;
1039 aelt
= Frassq (buf
, Vbuffer_alist
);
1040 link
= Fmemq (aelt
, Vbuffer_alist
);
1041 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1042 XCONS (link
)->cdr
= Qnil
;
1043 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1049 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1050 "Delete the entire contents of the current buffer.\n\
1051 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1052 so the buffer is truly empty after this.")
1057 current_buffer
->last_window_start
= 1;
1058 /* Prevent warnings, or suspension of auto saving, that would happen
1059 if future size is less than past size. Use of erase-buffer
1060 implies that the future text is not really related to the past text. */
1061 XFASTINT (current_buffer
->save_length
) = 0;
1065 validate_region (b
, e
)
1066 register Lisp_Object
*b
, *e
;
1070 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1071 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1073 if (XINT (*b
) > XINT (*e
))
1075 i
= XFASTINT (*b
); /* This is legit even if *b is < 0 */
1077 XFASTINT (*e
) = i
; /* because this is all we do with i. */
1080 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1081 && XINT (*e
) <= ZV
))
1082 args_out_of_range (*b
, *e
);
1086 list_buffers_1 (files
)
1089 register Lisp_Object tail
, tem
, buf
;
1090 Lisp_Object col1
, col2
, col3
, minspace
;
1091 register struct buffer
*old
= current_buffer
, *b
;
1092 Lisp_Object desired_point
;
1093 Lisp_Object other_file_symbol
;
1095 desired_point
= Qnil
;
1096 other_file_symbol
= intern ("list-buffers-directory");
1098 XFASTINT (col1
) = 19;
1099 XFASTINT (col2
) = 25;
1100 XFASTINT (col3
) = 40;
1101 XFASTINT (minspace
) = 1;
1103 Fset_buffer (Vstandard_output
);
1105 tail
= intern ("Buffer-menu-mode");
1106 if (!EQ (tail
, current_buffer
->major_mode
)
1107 && (tem
= Ffboundp (tail
), !NILP (tem
)))
1109 Fbuffer_disable_undo (Vstandard_output
);
1110 current_buffer
->read_only
= Qnil
;
1113 MR Buffer Size Mode File\n\
1114 -- ------ ---- ---- ----\n", -1);
1116 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1118 buf
= Fcdr (Fcar (tail
));
1120 /* Don't mention the minibuffers. */
1121 if (XSTRING (b
->name
)->data
[0] == ' ')
1123 /* Optionally don't mention buffers that lack files. */
1124 if (!NILP (files
) && NILP (b
->filename
))
1126 /* Identify the current buffer. */
1128 XFASTINT (desired_point
) = point
;
1129 write_string (b
== old
? "." : " ", -1);
1130 /* Identify modified buffers */
1131 write_string (BUF_MODIFF (b
) > b
->save_modified
? "*" : " ", -1);
1132 write_string (NILP (b
->read_only
) ? " " : "% ", -1);
1133 Fprinc (b
->name
, Qnil
);
1134 Findent_to (col1
, make_number (2));
1135 XFASTINT (tem
) = BUF_Z (b
) - BUF_BEG (b
);
1137 Findent_to (col2
, minspace
);
1138 Fprinc (b
->mode_name
, Qnil
);
1139 Findent_to (col3
, minspace
);
1141 if (!NILP (b
->filename
))
1142 Fprinc (b
->filename
, Qnil
);
1145 /* No visited file; check local value of list-buffers-directory. */
1147 set_buffer_internal (b
);
1148 tem
= Fboundp (other_file_symbol
);
1151 tem
= Fsymbol_value (other_file_symbol
);
1152 Fset_buffer (Vstandard_output
);
1153 if (XTYPE (tem
) == Lisp_String
)
1157 Fset_buffer (Vstandard_output
);
1159 write_string ("\n", -1);
1162 current_buffer
->read_only
= Qt
;
1163 set_buffer_internal (old
);
1164 return desired_point
;
1167 DEFUN ("list-buffers", Flist_buffers
, Slist_buffers
, 0, 1, "P",
1168 "Display a list of names of existing buffers.\n\
1169 The list is displayed in a buffer named `*Buffer List*'.\n\
1170 Note that buffers with names starting with spaces are omitted.\n\
1171 Non-null optional arg FILES-ONLY means mention only file buffers.\n\
1173 The M column contains a * for buffers that are modified.\n\
1174 The R column contains a % for buffers that are read-only.")
1178 Lisp_Object desired_point
;
1181 = internal_with_output_to_temp_buffer ("*Buffer List*",
1182 list_buffers_1
, files
);
1184 if (NUMBERP (desired_point
))
1186 int count
= specpdl_ptr
- specpdl
;
1187 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
1188 Fset_buffer (build_string ("*Buffer List*"));
1189 SET_PT (XINT (desired_point
));
1190 return unbind_to (count
, Qnil
);
1195 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1197 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1198 Most local variable bindings are eliminated so that the default values\n\
1199 become effective once more. Also, the syntax table is set from\n\
1200 `standard-syntax-table', the local keymap is set to nil,\n\
1201 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1202 This function also forces redisplay of the mode line.\n\
1204 Every function to select a new major mode starts by\n\
1205 calling this function.\n\n\
1206 As a special exception, local variables whose names have\n\
1207 a non-nil `permanent-local' property are not eliminated by this function.")
1210 register Lisp_Object alist
, sym
, tem
;
1213 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1214 oalist
= current_buffer
->local_var_alist
;
1216 /* Make sure no local variables remain set up with this buffer
1217 for their current values. */
1219 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1221 sym
= XCONS (XCONS (alist
)->car
)->car
;
1223 /* Need not do anything if some other buffer's binding is now encached. */
1224 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
;
1225 if (XBUFFER (tem
) == current_buffer
)
1227 /* Symbol is set up for this buffer's old local value.
1228 Set it up for the current buffer with the default value. */
1230 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1231 /* Store the symbol's current value into the alist entry
1232 it is currently set up for. This is so that, if the
1233 local is marked permanent, and we make it local again below,
1234 we don't lose the value. */
1235 XCONS (XCONS (tem
)->car
)->cdr
1236 = do_symval_forwarding (XCONS (XSYMBOL (sym
)->value
)->car
);
1237 /* Switch to the symbol's default-value alist entry. */
1238 XCONS (tem
)->car
= tem
;
1239 /* Mark it as current for the current buffer. */
1240 XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
= Fcurrent_buffer ();
1241 /* Store the current value into any forwarding in the symbol. */
1242 store_symval_forwarding (sym
, XCONS (XSYMBOL (sym
)->value
)->car
,
1247 /* Actually eliminate all local bindings of this buffer. */
1249 reset_buffer_local_variables (current_buffer
);
1251 /* Redisplay mode lines; we are changing major mode. */
1253 update_mode_lines
++;
1255 /* Any which are supposed to be permanent,
1256 make local again, with the same values they had. */
1258 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1260 sym
= XCONS (XCONS (alist
)->car
)->car
;
1261 tem
= Fget (sym
, Qpermanent_local
);
1264 Fmake_local_variable (sym
);
1265 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1269 /* Force mode-line redisplay. Useful here because all major mode
1270 commands call this function. */
1271 update_mode_lines
++;
1276 /* Find all the overlays in the current buffer that contain position POS.
1277 Return the number found, and store them in a vector in *VEC_PTR.
1278 Store in *LEN_PTR the size allocated for the vector.
1279 Store in *NEXT_PTR the next position after POS where an overlay starts,
1280 or ZV if there are no more overlays.
1282 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1283 when this function is called.
1285 If EXTEND is non-zero, we make the vector bigger if necessary.
1286 If EXTEND is zero, we never extend the vector,
1287 and we store only as many overlays as will fit.
1288 But we still return the total number of overlays. */
1291 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
)
1294 Lisp_Object
**vec_ptr
;
1298 Lisp_Object tail
, overlay
, start
, end
, result
;
1301 Lisp_Object
*vec
= *vec_ptr
;
1303 int inhibit_storing
= 0;
1305 for (tail
= current_buffer
->overlays_before
;
1307 tail
= XCONS (tail
)->cdr
)
1311 overlay
= XCONS (tail
)->car
;
1312 if (! OVERLAY_VALID (overlay
))
1315 start
= OVERLAY_START (overlay
);
1316 end
= OVERLAY_END (overlay
);
1317 if (OVERLAY_POSITION (end
) <= pos
)
1319 startpos
= OVERLAY_POSITION (start
);
1320 if (startpos
<= pos
)
1324 /* The supplied vector is full.
1325 Either make it bigger, or don't store any more in it. */
1328 *len_ptr
= len
*= 2;
1329 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1333 inhibit_storing
= 1;
1336 if (!inhibit_storing
)
1338 /* Keep counting overlays even if we can't return them all. */
1341 else if (startpos
< next
)
1345 for (tail
= current_buffer
->overlays_after
;
1347 tail
= XCONS (tail
)->cdr
)
1351 overlay
= XCONS (tail
)->car
;
1352 if (! OVERLAY_VALID (overlay
))
1355 start
= OVERLAY_START (overlay
);
1356 end
= OVERLAY_END (overlay
);
1357 startpos
= OVERLAY_POSITION (start
);
1360 if (startpos
< next
)
1364 if (pos
< OVERLAY_POSITION (end
))
1370 *len_ptr
= len
*= 2;
1371 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1375 inhibit_storing
= 1;
1378 if (!inhibit_storing
)
1390 Lisp_Object overlay
;
1396 compare_overlays (s1
, s2
)
1397 struct sortvec
*s1
, *s2
;
1399 if (s1
->priority
!= s2
->priority
)
1400 return s1
->priority
- s2
->priority
;
1401 if (s1
->beg
!= s2
->beg
)
1402 return s1
->beg
- s2
->beg
;
1403 if (s1
->end
!= s2
->end
)
1404 return s2
->end
- s1
->end
;
1408 /* Sort an array of overlays by priority. The array is modified in place.
1409 The return value is the new size; this may be smaller than the original
1410 size if some of the overlays were invalid or were window-specific. */
1412 sort_overlays (overlay_vec
, noverlays
, w
)
1413 Lisp_Object
*overlay_vec
;
1418 struct sortvec
*sortvec
;
1419 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
1421 /* Put the valid and relevant overlays into sortvec. */
1423 for (i
= 0, j
= 0; i
< noverlays
; i
++)
1426 Lisp_Object overlay
= overlay_vec
[i
];
1428 if (OVERLAY_VALID (overlay
)
1429 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
1430 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
1432 /* If we're interested in a specific window, then ignore
1433 overlays that are limited to some other window. */
1438 window
= Foverlay_get (overlay
, Qwindow
);
1439 if (XTYPE (window
) == Lisp_Window
&& XWINDOW (window
) != w
)
1443 /* This overlay is good and counts: put it into sortvec. */
1444 sortvec
[j
].overlay
= overlay
;
1445 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1446 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1447 tem
= Foverlay_get (overlay
, Qpriority
);
1449 sortvec
[j
].priority
= XINT (tem
);
1451 sortvec
[j
].priority
= 0;
1457 /* Sort the overlays into the proper order: increasing priority. */
1460 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
1462 for (i
= 0; i
< noverlays
; i
++)
1463 overlay_vec
[i
] = sortvec
[i
].overlay
;
1467 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
1470 recenter_overlay_lists (buf
, pos
)
1474 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
1476 /* See if anything in overlays_before should move to overlays_after. */
1478 /* We don't strictly need prev in this loop; it should always be nil.
1479 But we use it for symmetry and in case that should cease to be true
1480 with some future change. */
1482 for (tail
= buf
->overlays_before
;
1484 prev
= tail
, tail
= next
)
1486 next
= XCONS (tail
)->cdr
;
1487 overlay
= XCONS (tail
)->car
;
1489 /* If the overlay is not valid, get rid of it. */
1490 if (!OVERLAY_VALID (overlay
))
1495 /* Splice the cons cell TAIL out of overlays_before. */
1497 XCONS (prev
)->cdr
= next
;
1499 buf
->overlays_before
= next
;
1505 beg
= OVERLAY_START (overlay
);
1506 end
= OVERLAY_END (overlay
);
1508 if (OVERLAY_POSITION (end
) > pos
)
1510 /* OVERLAY needs to be moved. */
1511 int where
= OVERLAY_POSITION (beg
);
1512 Lisp_Object other
, other_prev
;
1514 /* Splice the cons cell TAIL out of overlays_before. */
1516 XCONS (prev
)->cdr
= next
;
1518 buf
->overlays_before
= next
;
1520 /* Search thru overlays_after for where to put it. */
1522 for (other
= buf
->overlays_after
;
1524 other_prev
= other
, other
= XCONS (other
)->cdr
)
1526 Lisp_Object otherbeg
, otheroverlay
, follower
;
1529 otheroverlay
= XCONS (other
)->car
;
1530 if (! OVERLAY_VALID (otheroverlay
))
1533 otherbeg
= OVERLAY_START (otheroverlay
);
1534 if (OVERLAY_POSITION (otherbeg
) >= where
)
1538 /* Add TAIL to overlays_after before OTHER. */
1539 XCONS (tail
)->cdr
= other
;
1540 if (!NILP (other_prev
))
1541 XCONS (other_prev
)->cdr
= tail
;
1543 buf
->overlays_after
= tail
;
1547 /* We've reached the things that should stay in overlays_before.
1548 All the rest of overlays_before must end even earlier,
1553 /* See if anything in overlays_after should be in overlays_before. */
1555 for (tail
= buf
->overlays_after
;
1557 prev
= tail
, tail
= next
)
1559 next
= XCONS (tail
)->cdr
;
1560 overlay
= XCONS (tail
)->car
;
1562 /* If the overlay is not valid, get rid of it. */
1563 if (!OVERLAY_VALID (overlay
))
1568 /* Splice the cons cell TAIL out of overlays_after. */
1570 XCONS (prev
)->cdr
= next
;
1572 buf
->overlays_after
= next
;
1578 beg
= OVERLAY_START (overlay
);
1579 end
= OVERLAY_END (overlay
);
1581 /* Stop looking, when we know that nothing further
1582 can possibly end before POS. */
1583 if (OVERLAY_POSITION (beg
) > pos
)
1586 if (OVERLAY_POSITION (end
) <= pos
)
1588 /* OVERLAY needs to be moved. */
1589 int where
= OVERLAY_POSITION (end
);
1590 Lisp_Object other
, other_prev
;
1592 /* Splice the cons cell TAIL out of overlays_after. */
1594 XCONS (prev
)->cdr
= next
;
1596 buf
->overlays_after
= next
;
1598 /* Search thru overlays_before for where to put it. */
1600 for (other
= buf
->overlays_before
;
1602 other_prev
= other
, other
= XCONS (other
)->cdr
)
1604 Lisp_Object otherend
, otheroverlay
;
1607 otheroverlay
= XCONS (other
)->car
;
1608 if (! OVERLAY_VALID (otheroverlay
))
1611 otherend
= OVERLAY_END (otheroverlay
);
1612 if (OVERLAY_POSITION (otherend
) <= where
)
1616 /* Add TAIL to overlays_before before OTHER. */
1617 XCONS (tail
)->cdr
= other
;
1618 if (!NILP (other_prev
))
1619 XCONS (other_prev
)->cdr
= tail
;
1621 buf
->overlays_before
= tail
;
1626 XFASTINT (buf
->overlay_center
) = pos
;
1629 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
1630 "Return t if OBJECT is an overlay.")
1634 return (OVERLAYP (object
) ? Qt
: Qnil
);
1637 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 3, 0,
1638 "Create a new overlay with range BEG to END in BUFFER.\n\
1639 If omitted, BUFFER defaults to the current buffer.\n\
1640 BEG and END may be integers or markers.")
1642 Lisp_Object beg
, end
, buffer
;
1644 Lisp_Object overlay
;
1648 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1650 CHECK_BUFFER (buffer
, 2);
1652 && ! EQ (Fmarker_buffer (beg
), buffer
))
1653 error ("Marker points into wrong buffer");
1655 && ! EQ (Fmarker_buffer (end
), buffer
))
1656 error ("Marker points into wrong buffer");
1658 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1659 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1661 if (XINT (beg
) > XINT (end
))
1663 Lisp_Object temp
= beg
;
1664 beg
= end
; end
= temp
;
1667 b
= XBUFFER (buffer
);
1669 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
1670 end
= Fset_marker (Fmake_marker (), end
, buffer
);
1672 overlay
= Fcons (Fcons (beg
, end
), Qnil
);
1673 XSETTYPE (overlay
, Lisp_Overlay
);
1675 /* Put the new overlay on the wrong list. */
1676 end
= OVERLAY_END (overlay
);
1677 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1678 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1680 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1682 /* This puts it in the right list, and in the right order. */
1683 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1685 /* We don't need to redisplay the region covered by the overlay, because
1686 the overlay has no properties at the moment. */
1691 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
1692 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
1693 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
1694 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
1696 (overlay
, beg
, end
, buffer
)
1697 Lisp_Object overlay
, beg
, end
, buffer
;
1699 struct buffer
*b
, *ob
;
1700 Lisp_Object obuffer
;
1701 int count
= specpdl_ptr
- specpdl
;
1703 CHECK_OVERLAY (overlay
, 0);
1705 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1707 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1708 CHECK_BUFFER (buffer
, 3);
1711 && ! EQ (Fmarker_buffer (beg
), buffer
))
1712 error ("Marker points into wrong buffer");
1714 && ! EQ (Fmarker_buffer (end
), buffer
))
1715 error ("Marker points into wrong buffer");
1717 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1718 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1720 specbind (Qinhibit_quit
, Qt
);
1722 if (XINT (beg
) > XINT (end
))
1724 Lisp_Object temp
= beg
;
1725 beg
= end
; end
= temp
;
1728 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1729 b
= XBUFFER (buffer
);
1730 ob
= XBUFFER (obuffer
);
1732 /* If the overlay has changed buffers, do a thorough redisplay. */
1733 if (!EQ (buffer
, obuffer
))
1734 windows_or_buffers_changed
= 1;
1736 /* Redisplay the area the overlay has just left, or just enclosed. */
1740 int change_beg
, change_end
;
1742 o_beg
= OVERLAY_START (overlay
);
1743 o_end
= OVERLAY_END (overlay
);
1744 o_beg
= OVERLAY_POSITION (o_beg
);
1745 o_end
= OVERLAY_POSITION (o_end
);
1747 if (XINT (o_beg
) == XINT (beg
))
1748 redisplay_region (b
, XINT (o_end
), XINT (end
));
1749 else if (XINT (o_end
) == XINT (end
))
1750 redisplay_region (b
, XINT (o_beg
), XINT (beg
));
1753 if (XINT (beg
) < XINT (o_beg
)) o_beg
= beg
;
1754 if (XINT (end
) > XINT (o_end
)) o_end
= end
;
1755 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
1759 if (!NILP (obuffer
))
1761 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
1762 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
1765 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
1766 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
1768 /* Put the overlay on the wrong list. */
1769 end
= OVERLAY_END (overlay
);
1770 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1771 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1773 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1775 /* This puts it in the right list, and in the right order. */
1776 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1778 return unbind_to (count
, overlay
);
1781 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
1782 "Delete the overlay OVERLAY from its buffer.")
1784 Lisp_Object overlay
;
1788 int count
= specpdl_ptr
- specpdl
;
1790 CHECK_OVERLAY (overlay
, 0);
1792 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1796 b
= XBUFFER (buffer
);
1798 specbind (Qinhibit_quit
, Qt
);
1800 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
1801 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
1803 redisplay_region (b
,
1804 marker_position (OVERLAY_START (overlay
)),
1805 marker_position (OVERLAY_END (overlay
)));
1807 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
1808 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
1810 return unbind_to (count
, Qnil
);
1813 /* Overlay dissection functions. */
1815 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
1816 "Return the position at which OVERLAY starts.")
1818 Lisp_Object overlay
;
1820 CHECK_OVERLAY (overlay
, 0);
1822 return (Fmarker_position (OVERLAY_START (overlay
)));
1825 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
1826 "Return the position at which OVERLAY ends.")
1828 Lisp_Object overlay
;
1830 CHECK_OVERLAY (overlay
, 0);
1832 return (Fmarker_position (OVERLAY_END (overlay
)));
1835 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
1836 "Return the buffer OVERLAY belongs to.")
1838 Lisp_Object overlay
;
1840 CHECK_OVERLAY (overlay
, 0);
1842 return Fmarker_buffer (OVERLAY_START (overlay
));
1845 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
1846 "Return a list of the properties on OVERLAY.\n\
1847 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
1850 Lisp_Object overlay
;
1852 CHECK_OVERLAY (overlay
, 0);
1854 return Fcopy_sequence (Fcdr_safe (XCONS (overlay
)->cdr
));
1858 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
1859 "Return a list of the overlays that contain position POS.")
1865 Lisp_Object
*overlay_vec
;
1869 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1872 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1874 /* Put all the overlays we want in a vector in overlay_vec.
1875 Store the length in len. */
1876 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
1878 /* Make a list of them all. */
1879 result
= Flist (noverlays
, overlay_vec
);
1881 xfree (overlay_vec
);
1885 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
1887 "Return the next position after POS where an overlay starts or ends.")
1893 Lisp_Object
*overlay_vec
;
1898 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1901 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1903 /* Put all the overlays we want in a vector in overlay_vec.
1904 Store the length in len.
1905 endpos gets the position where the next overlay starts. */
1906 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
1908 /* If any of these overlays ends before endpos,
1909 use its ending point instead. */
1910 for (i
= 0; i
< noverlays
; i
++)
1915 oend
= OVERLAY_END (overlay_vec
[i
]);
1916 oendpos
= OVERLAY_POSITION (oend
);
1917 if (oendpos
< endpos
)
1921 xfree (overlay_vec
);
1922 return make_number (endpos
);
1925 /* These functions are for debugging overlays. */
1927 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
1928 "Return a pair of lists giving all the overlays of the current buffer.\n\
1929 The car has all the overlays before the overlay center;\n\
1930 the cdr has all the overlays before the overlay center.\n\
1931 Recentering overlays moves overlays between these lists.\n\
1932 The lists you get are copies, so that changing them has no effect.\n\
1933 However, the overlays you get are the real objects that the buffer uses.")
1936 Lisp_Object before
, after
;
1937 before
= current_buffer
->overlays_before
;
1939 before
= Fcopy_sequence (before
);
1940 after
= current_buffer
->overlays_after
;
1942 after
= Fcopy_sequence (after
);
1944 return Fcons (before
, after
);
1947 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
1948 "Recenter the overlays of the current buffer around position POS.")
1952 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1954 recenter_overlay_lists (current_buffer
, XINT (pos
));
1958 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
1959 "Get the property of overlay OVERLAY with property name NAME.")
1961 Lisp_Object overlay
, prop
;
1965 CHECK_OVERLAY (overlay
, 0);
1967 for (plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
1968 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
1969 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
1971 if (EQ (XCONS (plist
)->car
, prop
))
1972 return XCONS (XCONS (plist
)->cdr
)->car
;
1978 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
1979 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
1980 (overlay
, prop
, value
)
1981 Lisp_Object overlay
, prop
, value
;
1983 Lisp_Object plist
, tail
;
1985 CHECK_OVERLAY (overlay
, 0);
1987 tail
= Fmarker_buffer (OVERLAY_START (overlay
));
1989 redisplay_region (XMARKER (OVERLAY_START (overlay
))->buffer
,
1990 marker_position (OVERLAY_START (overlay
)),
1991 marker_position (OVERLAY_END (overlay
)));
1993 plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
1996 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
1997 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
1999 if (EQ (XCONS (tail
)->car
, prop
))
2000 return XCONS (XCONS (tail
)->cdr
)->car
= value
;
2003 if (! CONSP (XCONS (overlay
)->cdr
))
2004 XCONS (overlay
)->cdr
= Fcons (Qnil
, Qnil
);
2006 XCONS (XCONS (overlay
)->cdr
)->cdr
2007 = Fcons (prop
, Fcons (value
, plist
));
2012 /* Run the modification-hooks of overlays that include
2013 any part of the text in START to END.
2014 Run the insert-before-hooks of overlay starting at END,
2015 and the insert-after-hooks of overlay ending at START. */
2018 verify_overlay_modification (start
, end
)
2019 Lisp_Object start
, end
;
2021 Lisp_Object prop
, overlay
, tail
;
2022 int insertion
= EQ (start
, end
);
2024 for (tail
= current_buffer
->overlays_before
;
2026 tail
= XCONS (tail
)->cdr
)
2028 int startpos
, endpos
;
2029 Lisp_Object ostart
, oend
;
2031 overlay
= XCONS (tail
)->car
;
2033 ostart
= OVERLAY_START (overlay
);
2034 oend
= OVERLAY_END (overlay
);
2035 endpos
= OVERLAY_POSITION (oend
);
2036 if (XFASTINT (start
) > endpos
)
2038 startpos
= OVERLAY_POSITION (ostart
);
2039 if (XFASTINT (end
) == startpos
&& insertion
)
2041 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
2042 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2044 if (XFASTINT (start
) == endpos
&& insertion
)
2046 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
2047 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2050 ? (XFASTINT (start
) > startpos
&& XFASTINT (end
) < endpos
)
2051 : (XFASTINT (start
) >= startpos
&& XFASTINT (end
) <= endpos
))
2053 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
2054 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2058 for (tail
= current_buffer
->overlays_after
;
2060 tail
= XCONS (tail
)->cdr
)
2062 int startpos
, endpos
;
2063 Lisp_Object ostart
, oend
;
2065 overlay
= XCONS (tail
)->car
;
2067 ostart
= OVERLAY_START (overlay
);
2068 oend
= OVERLAY_END (overlay
);
2069 startpos
= OVERLAY_POSITION (ostart
);
2070 endpos
= OVERLAY_POSITION (oend
);
2071 if (XFASTINT (end
) < startpos
)
2073 if (XFASTINT (end
) == startpos
&& insertion
)
2075 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
2076 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2078 if (XFASTINT (start
) == endpos
&& insertion
)
2080 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
2081 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2084 ? (XFASTINT (start
) > startpos
&& XFASTINT (end
) < endpos
)
2085 : (XFASTINT (start
) >= startpos
&& XFASTINT (end
) <= endpos
))
2087 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
2088 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2094 call_overlay_mod_hooks (list
, overlay
, start
, end
)
2095 Lisp_Object list
, overlay
, start
, end
;
2097 struct gcpro gcpro1
;
2099 while (!NILP (list
))
2101 call3 (Fcar (list
), overlay
, start
, end
);
2107 /* Somebody has tried to store NEWVAL into the buffer-local slot with
2108 offset XUINT (valcontents), and NEWVAL has an unacceptable type. */
2110 buffer_slot_type_mismatch (valcontents
, newval
)
2111 Lisp_Object valcontents
, newval
;
2113 unsigned int offset
= XUINT (valcontents
);
2114 unsigned char *symbol_name
=
2115 (XSYMBOL (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
2119 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
2121 case Lisp_Int
: type_name
= "integers"; break;
2122 case Lisp_String
: type_name
= "strings"; break;
2123 case Lisp_Marker
: type_name
= "markers"; break;
2124 case Lisp_Symbol
: type_name
= "symbols"; break;
2125 case Lisp_Cons
: type_name
= "lists"; break;
2126 case Lisp_Vector
: type_name
= "vectors"; break;
2131 error ("only %s should be stored in the buffer-local variable %s",
2132 type_name
, symbol_name
);
2137 register Lisp_Object tem
;
2139 /* Make sure all markable slots in buffer_defaults
2140 are initialized reasonably, so mark_buffer won't choke. */
2141 reset_buffer (&buffer_defaults
);
2142 reset_buffer (&buffer_local_symbols
);
2143 XSET (Vbuffer_defaults
, Lisp_Buffer
, &buffer_defaults
);
2144 XSET (Vbuffer_local_symbols
, Lisp_Buffer
, &buffer_local_symbols
);
2146 /* Set up the default values of various buffer slots. */
2147 /* Must do these before making the first buffer! */
2149 /* real setup is done in loaddefs.el */
2150 buffer_defaults
.mode_line_format
= build_string ("%-");
2151 buffer_defaults
.abbrev_mode
= Qnil
;
2152 buffer_defaults
.overwrite_mode
= Qnil
;
2153 buffer_defaults
.case_fold_search
= Qt
;
2154 buffer_defaults
.auto_fill_function
= Qnil
;
2155 buffer_defaults
.selective_display
= Qnil
;
2157 buffer_defaults
.selective_display_ellipses
= Qt
;
2159 buffer_defaults
.abbrev_table
= Qnil
;
2160 buffer_defaults
.display_table
= Qnil
;
2161 buffer_defaults
.undo_list
= Qnil
;
2162 buffer_defaults
.mark_active
= Qnil
;
2163 buffer_defaults
.overlays_before
= Qnil
;
2164 buffer_defaults
.overlays_after
= Qnil
;
2165 XFASTINT (buffer_defaults
.overlay_center
) = 1;
2167 XFASTINT (buffer_defaults
.tab_width
) = 8;
2168 buffer_defaults
.truncate_lines
= Qnil
;
2169 buffer_defaults
.ctl_arrow
= Qt
;
2172 buffer_defaults
.buffer_file_type
= 0; /* TEXT */
2174 XFASTINT (buffer_defaults
.fill_column
) = 70;
2175 XFASTINT (buffer_defaults
.left_margin
) = 0;
2177 /* Assign the local-flags to the slots that have default values.
2178 The local flag is a bit that is used in the buffer
2179 to say that it has its own local value for the slot.
2180 The local flag bits are in the local_var_flags slot of the buffer. */
2182 /* Nothing can work if this isn't true */
2183 if (sizeof (int) != sizeof (Lisp_Object
)) abort ();
2185 /* 0 means not a lisp var, -1 means always local, else mask */
2186 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
2187 XFASTINT (buffer_local_flags
.filename
) = -1;
2188 XFASTINT (buffer_local_flags
.directory
) = -1;
2189 XFASTINT (buffer_local_flags
.backed_up
) = -1;
2190 XFASTINT (buffer_local_flags
.save_length
) = -1;
2191 XFASTINT (buffer_local_flags
.auto_save_file_name
) = -1;
2192 XFASTINT (buffer_local_flags
.read_only
) = -1;
2193 XFASTINT (buffer_local_flags
.major_mode
) = -1;
2194 XFASTINT (buffer_local_flags
.mode_name
) = -1;
2195 XFASTINT (buffer_local_flags
.undo_list
) = -1;
2196 XFASTINT (buffer_local_flags
.mark_active
) = -1;
2198 XFASTINT (buffer_local_flags
.mode_line_format
) = 1;
2199 XFASTINT (buffer_local_flags
.abbrev_mode
) = 2;
2200 XFASTINT (buffer_local_flags
.overwrite_mode
) = 4;
2201 XFASTINT (buffer_local_flags
.case_fold_search
) = 8;
2202 XFASTINT (buffer_local_flags
.auto_fill_function
) = 0x10;
2203 XFASTINT (buffer_local_flags
.selective_display
) = 0x20;
2205 XFASTINT (buffer_local_flags
.selective_display_ellipses
) = 0x40;
2207 XFASTINT (buffer_local_flags
.tab_width
) = 0x80;
2208 XFASTINT (buffer_local_flags
.truncate_lines
) = 0x100;
2209 XFASTINT (buffer_local_flags
.ctl_arrow
) = 0x200;
2210 XFASTINT (buffer_local_flags
.fill_column
) = 0x400;
2211 XFASTINT (buffer_local_flags
.left_margin
) = 0x800;
2212 XFASTINT (buffer_local_flags
.abbrev_table
) = 0x1000;
2213 XFASTINT (buffer_local_flags
.display_table
) = 0x2000;
2214 XFASTINT (buffer_local_flags
.syntax_table
) = 0x8000;
2216 XFASTINT (buffer_local_flags
.buffer_file_type
) = 0x4000;
2219 Vbuffer_alist
= Qnil
;
2223 QSFundamental
= build_string ("Fundamental");
2225 Qfundamental_mode
= intern ("fundamental-mode");
2226 buffer_defaults
.major_mode
= Qfundamental_mode
;
2228 Qmode_class
= intern ("mode-class");
2230 Qprotected_field
= intern ("protected-field");
2232 Qpermanent_local
= intern ("permanent-local");
2234 Qkill_buffer_hook
= intern ("kill-buffer-hook");
2236 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
2237 /* super-magic invisible buffer */
2238 Vbuffer_alist
= Qnil
;
2240 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2245 char buf
[MAXPATHLEN
+1];
2247 struct stat dotstat
, pwdstat
;
2250 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2252 /* If PWD is accurate, use it instead of calling getwd. This is faster
2253 when PWD is right, and may avoid a fatal error. */
2254 if ((pwd
= getenv ("PWD")) != 0 && *pwd
== '/'
2255 && stat (pwd
, &pwdstat
) == 0
2256 && stat (".", &dotstat
) == 0
2257 && dotstat
.st_ino
== pwdstat
.st_ino
2258 && dotstat
.st_dev
== pwdstat
.st_dev
2259 && strlen (pwd
) < MAXPATHLEN
)
2261 else if (getwd (buf
) == 0)
2262 fatal ("`getwd' failed: %s.\n", buf
);
2265 /* Maybe this should really use some standard subroutine
2266 whose definition is filename syntax dependent. */
2267 if (buf
[strlen (buf
) - 1] != '/')
2269 #endif /* not VMS */
2270 current_buffer
->directory
= build_string (buf
);
2272 temp
= get_minibuffer (0);
2273 XBUFFER (temp
)->directory
= current_buffer
->directory
;
2276 /* initialize the buffer routines */
2279 extern Lisp_Object Qdisabled
;
2281 staticpro (&Vbuffer_defaults
);
2282 staticpro (&Vbuffer_local_symbols
);
2283 staticpro (&Qfundamental_mode
);
2284 staticpro (&Qmode_class
);
2285 staticpro (&QSFundamental
);
2286 staticpro (&Vbuffer_alist
);
2287 staticpro (&Qprotected_field
);
2288 staticpro (&Qpermanent_local
);
2289 staticpro (&Qkill_buffer_hook
);
2290 staticpro (&Qoverlayp
);
2291 staticpro (&Qmodification_hooks
);
2292 Qmodification_hooks
= intern ("modification-hooks");
2293 staticpro (&Qinsert_in_front_hooks
);
2294 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
2295 staticpro (&Qinsert_behind_hooks
);
2296 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
2297 staticpro (&Qget_file_buffer
);
2298 Qget_file_buffer
= intern ("get-file-buffer");
2299 Qpriority
= intern ("priority");
2300 staticpro (&Qpriority
);
2301 Qwindow
= intern ("window");
2302 staticpro (&Qwindow
);
2304 Qoverlayp
= intern ("overlayp");
2306 Fput (Qprotected_field
, Qerror_conditions
,
2307 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
2308 Fput (Qprotected_field
, Qerror_message
,
2309 build_string ("Attempt to modify a protected field"));
2311 /* All these use DEFVAR_LISP_NOPRO because the slots in
2312 buffer_defaults will all be marked via Vbuffer_defaults. */
2314 DEFVAR_LISP_NOPRO ("default-mode-line-format",
2315 &buffer_defaults
.mode_line_format
,
2316 "Default value of `mode-line-format' for buffers that don't override it.\n\
2317 This is the same as (default-value 'mode-line-format).");
2319 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
2320 &buffer_defaults
.abbrev_mode
,
2321 "Default value of `abbrev-mode' for buffers that do not override it.\n\
2322 This is the same as (default-value 'abbrev-mode).");
2324 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
2325 &buffer_defaults
.ctl_arrow
,
2326 "Default value of `ctl-arrow' for buffers that do not override it.\n\
2327 This is the same as (default-value 'ctl-arrow).");
2329 DEFVAR_LISP_NOPRO ("default-truncate-lines",
2330 &buffer_defaults
.truncate_lines
,
2331 "Default value of `truncate-lines' for buffers that do not override it.\n\
2332 This is the same as (default-value 'truncate-lines).");
2334 DEFVAR_LISP_NOPRO ("default-fill-column",
2335 &buffer_defaults
.fill_column
,
2336 "Default value of `fill-column' for buffers that do not override it.\n\
2337 This is the same as (default-value 'fill-column).");
2339 DEFVAR_LISP_NOPRO ("default-left-margin",
2340 &buffer_defaults
.left_margin
,
2341 "Default value of `left-margin' for buffers that do not override it.\n\
2342 This is the same as (default-value 'left-margin).");
2344 DEFVAR_LISP_NOPRO ("default-tab-width",
2345 &buffer_defaults
.tab_width
,
2346 "Default value of `tab-width' for buffers that do not override it.\n\
2347 This is the same as (default-value 'tab-width).");
2349 DEFVAR_LISP_NOPRO ("default-case-fold-search",
2350 &buffer_defaults
.case_fold_search
,
2351 "Default value of `case-fold-search' for buffers that don't override it.\n\
2352 This is the same as (default-value 'case-fold-search).");
2355 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
2356 &buffer_defaults
.buffer_file_type
,
2357 "Default file type for buffers that do not override it.\n\
2358 This is the same as (default-value 'buffer-file-type).\n\
2359 The file type is nil for text, t for binary.");
2362 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
2365 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
2366 But make-docfile finds it!
2367 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
2369 "Template for displaying mode line for current buffer.\n\
2370 Each buffer has its own value of this variable.\n\
2371 Value may be a string, a symbol or a list or cons cell.\n\
2372 For a symbol, its value is used (but it is ignored if t or nil).\n\
2373 A string appearing directly as the value of a symbol is processed verbatim\n\
2374 in that the %-constructs below are not recognized.\n\
2375 For a list whose car is a symbol, the symbol's value is taken,\n\
2376 and if that is non-nil, the cadr of the list is processed recursively.\n\
2377 Otherwise, the caddr of the list (if there is one) is processed.\n\
2378 For a list whose car is a string or list, each element is processed\n\
2379 recursively and the results are effectively concatenated.\n\
2380 For a list whose car is an integer, the cdr of the list is processed\n\
2381 and padded (if the number is positive) or truncated (if negative)\n\
2382 to the width specified by that number.\n\
2383 A string is printed verbatim in the mode line except for %-constructs:\n\
2384 (%-constructs are allowed when the string is the entire mode-line-format\n\
2385 or when it is found in a cons-cell or a list)\n\
2386 %b -- print buffer name. %f -- print visited file name.\n\
2387 %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\
2388 %s -- print process status. %l -- print the current line number.\n\
2389 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
2390 %p -- print percent of buffer above bottom of window, perhaps plus Top,\n\
2391 or print Bottom or All.\n\
2392 %n -- print Narrow if appropriate.\n\
2393 %t -- print T if files is text, B if binary.\n\
2394 %[ -- print one [ for each recursive editing level. %] similar.\n\
2395 %% -- print %. %- -- print infinitely many dashes.\n\
2396 Decimal digits after the % specify field width to which to pad.");
2399 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
2400 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
2401 nil here means use current buffer's major mode.");
2403 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
2404 make_number (Lisp_Symbol
),
2405 "Symbol for current buffer's major mode.");
2407 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
2408 make_number (Lisp_String
),
2409 "Pretty name of current buffer's major mode (a string).");
2411 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
2412 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
2413 Automatically becomes buffer-local when set in any fashion.");
2415 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
2417 "*Non-nil if searches should ignore case.\n\
2418 Automatically becomes buffer-local when set in any fashion.");
2420 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
2421 make_number (Lisp_Int
),
2422 "*Column beyond which automatic line-wrapping should happen.\n\
2423 Automatically becomes buffer-local when set in any fashion.");
2425 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
2426 make_number (Lisp_Int
),
2427 "*Column for the default indent-line-function to indent to.\n\
2428 Linefeed indents to this column in Fundamental mode.\n\
2429 Automatically becomes buffer-local when set in any fashion.");
2431 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
2432 make_number (Lisp_Int
),
2433 "*Distance between tab stops (for display of tab characters), in columns.\n\
2434 Automatically becomes buffer-local when set in any fashion.");
2436 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
2437 "*Non-nil means display control chars with uparrow.\n\
2438 Nil means use backslash and octal digits.\n\
2439 Automatically becomes buffer-local when set in any fashion.\n\
2440 This variable does not apply to characters whose display is specified\n\
2441 in the current display table (if there is one).");
2443 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
2444 "*Non-nil means do not display continuation lines;\n\
2445 give each line of text one screen line.\n\
2446 Automatically becomes buffer-local when set in any fashion.\n\
2448 Note that this is overridden by the variable\n\
2449 `truncate-partial-width-windows' if that variable is non-nil\n\
2450 and this buffer is not full-frame width.");
2453 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
2455 "*If visited file is text, nil; otherwise, t.");
2458 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
2459 make_number (Lisp_String
),
2460 "Name of default directory of current buffer. Should end with slash.\n\
2461 Each buffer has its own value of this variable.");
2463 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
2465 "Function called (if non-nil) to perform auto-fill.\n\
2466 It is called after self-inserting a space at a column beyond `fill-column'.\n\
2467 Each buffer has its own value of this variable.\n\
2468 NOTE: This variable is not an ordinary hook;\n\
2469 It may not be a list of functions.");
2471 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
2472 make_number (Lisp_String
),
2473 "Name of file visited in current buffer, or nil if not visiting a file.\n\
2474 Each buffer has its own value of this variable.");
2476 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
2477 ¤t_buffer
->auto_save_file_name
,
2478 make_number (Lisp_String
),
2479 "Name of file for auto-saving current buffer,\n\
2480 or nil if buffer should not be auto-saved.\n\
2481 Each buffer has its own value of this variable.");
2483 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
2484 "Non-nil if this buffer is read-only.\n\
2485 Each buffer has its own value of this variable.");
2487 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
2488 "Non-nil if this buffer's file has been backed up.\n\
2489 Backing up is done before the first time the file is saved.\n\
2490 Each buffer has its own value of this variable.");
2492 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
2493 make_number (Lisp_Int
),
2494 "Length of current buffer when last read in, saved or auto-saved.\n\
2496 Each buffer has its own value of this variable.");
2498 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
2500 "Non-nil enables selective display:\n\
2501 Integer N as value means display only lines\n\
2502 that start with less than n columns of space.\n\
2503 A value of t means, after a ^M, all the rest of the line is invisible.\n\
2504 Then ^M's in the file are written into files as newlines.\n\n\
2505 Automatically becomes buffer-local when set in any fashion.");
2508 DEFVAR_PER_BUFFER ("selective-display-ellipses",
2509 ¤t_buffer
->selective_display_ellipses
,
2511 "t means display ... on previous line when a line is invisible.\n\
2512 Automatically becomes buffer-local when set in any fashion.");
2515 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
2516 "Non-nil if self-insertion should replace existing text.\n\
2517 If non-nil and not `overwrite-mode-binary', self-insertion still\n\
2518 inserts at the end of a line, and inserts when point is before a tab,\n\
2519 until the tab is filled in.\n\
2520 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
2521 Automatically becomes buffer-local when set in any fashion.");
2523 #if 0 /* The doc string is too long for some compilers,
2524 but make-docfile can find it in this comment. */
2525 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2527 "Display table that controls display of the contents of current buffer.\n\
2528 Automatically becomes buffer-local when set in any fashion.\n\
2529 The display table is a vector created with `make-display-table'.\n\
2530 The first 256 elements control how to display each possible text character.\n\
2531 Each value should be a vector of characters or nil;\n\
2532 nil means display the character in the default fashion.\n\
2533 The remaining five elements control the display of\n\
2534 the end of a truncated screen line (element 256, a single character);\n\
2535 the end of a continued line (element 257, a single character);\n\
2536 the escape character used to display character codes in octal\n\
2537 (element 258, a single character);\n\
2538 the character used as an arrow for control characters (element 259,\n\
2539 a single character);\n\
2540 the decoration indicating the presence of invisible lines (element 260,\n\
2541 a vector of characters).\n\
2542 If this variable is nil, the value of `standard-display-table' is used.\n\
2543 Each window can have its own, overriding display table.");
2545 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2548 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
2551 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
2552 "Function to call before each text change.\n\
2553 Two arguments are passed to the function: the positions of\n\
2554 the beginning and end of the range of old text to be changed.\n\
2555 \(For an insertion, the beginning and end are at the same place.)\n\
2556 No information is given about the length of the text after the change.\n\
2557 position of the change\n\
2559 While executing the `before-change-function', changes to buffers do not\n\
2560 cause calls to any `before-change-function' or `after-change-function'.");
2561 Vbefore_change_function
= Qnil
;
2563 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
2564 "Function to call after each text change.\n\
2565 Three arguments are passed to the function: the positions of\n\
2566 the beginning and end of the range of changed text,\n\
2567 and the length of the pre-change text replaced by that range.\n\
2568 \(For an insertion, the pre-change length is zero;\n\
2569 for a deletion, that length is the number of characters deleted,\n\
2570 and the post-change beginning and end are at the same place.)\n\
2572 While executing the `after-change-function', changes to buffers do not\n\
2573 cause calls to any `before-change-function' or `after-change-function'.");
2574 Vafter_change_function
= Qnil
;
2576 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
2577 "A list of functions to call before changing a buffer which is unmodified.\n\
2578 The functions are run using the `run-hooks' function.");
2579 Vfirst_change_hook
= Qnil
;
2580 Qfirst_change_hook
= intern ("first-change-hook");
2581 staticpro (&Qfirst_change_hook
);
2583 #if 0 /* The doc string is too long for some compilers,
2584 but make-docfile can find it in this comment. */
2585 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2586 "List of undo entries in current buffer.\n\
2587 Recent changes come first; older changes follow newer.\n\
2589 An entry (START . END) represents an insertion which begins at\n\
2590 position START and ends at position END.\n\
2592 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
2593 from (abs POSITION). If POSITION is positive, point was at the front\n\
2594 of the text being deleted; if negative, point was at the end.\n\
2596 An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\
2597 previously unmodified. HIGHWORD and LOWWORD are the high and low\n\
2598 16-bit words of the buffer's modification count at the time. If the\n\
2599 modification count of the most recent save is different, this entry is\n\
2602 An entry (nil PROP VAL BEG . END) indicates that a text property\n\
2603 was modified between BEG and END. PROP is the property name,\n\
2604 and VAL is the old value.\n\
2606 An entry of the form POSITION indicates that point was at the buffer\n\
2607 location given by the integer. Undoing an entry of this form places\n\
2608 point at POSITION.\n\
2610 nil marks undo boundaries. The undo command treats the changes\n\
2611 between two undo boundaries as a single step to be undone.\n\
2613 If the value of the variable is t, undo information is not recorded.");
2615 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2618 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
2619 "Non-nil means the mark and region are currently active in this buffer.\n\
2620 Automatically local in all buffers.");
2622 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
2623 "*Non-nil means deactivate the mark when the buffer contents change.");
2624 Vtransient_mark_mode
= Qnil
;
2626 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
2627 "*Non-nil means disregard read-only status of buffers or characters.\n\
2628 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
2629 text properties. If the value is a list, disregard `buffer-read-only'\n\
2630 and disregard a `read-only' text property if the property value\n\
2631 is a member of the list.");
2632 Vinhibit_read_only
= Qnil
;
2634 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
2635 "List of functions called with no args to query before killing a buffer.");
2636 Vkill_buffer_query_functions
= Qnil
;
2638 defsubr (&Sbuffer_list
);
2639 defsubr (&Sget_buffer
);
2640 defsubr (&Sget_file_buffer
);
2641 defsubr (&Sget_buffer_create
);
2642 defsubr (&Sgenerate_new_buffer_name
);
2643 defsubr (&Sbuffer_name
);
2644 /*defsubr (&Sbuffer_number);*/
2645 defsubr (&Sbuffer_file_name
);
2646 defsubr (&Sbuffer_local_variables
);
2647 defsubr (&Sbuffer_modified_p
);
2648 defsubr (&Sset_buffer_modified_p
);
2649 defsubr (&Sbuffer_modified_tick
);
2650 defsubr (&Srename_buffer
);
2651 defsubr (&Sother_buffer
);
2652 defsubr (&Sbuffer_disable_undo
);
2653 defsubr (&Sbuffer_enable_undo
);
2654 defsubr (&Skill_buffer
);
2655 defsubr (&Serase_buffer
);
2656 defsubr (&Sswitch_to_buffer
);
2657 defsubr (&Spop_to_buffer
);
2658 defsubr (&Scurrent_buffer
);
2659 defsubr (&Sset_buffer
);
2660 defsubr (&Sbarf_if_buffer_read_only
);
2661 defsubr (&Sbury_buffer
);
2662 defsubr (&Slist_buffers
);
2663 defsubr (&Skill_all_local_variables
);
2665 defsubr (&Soverlayp
);
2666 defsubr (&Smake_overlay
);
2667 defsubr (&Sdelete_overlay
);
2668 defsubr (&Smove_overlay
);
2669 defsubr (&Soverlay_start
);
2670 defsubr (&Soverlay_end
);
2671 defsubr (&Soverlay_buffer
);
2672 defsubr (&Soverlay_properties
);
2673 defsubr (&Soverlays_at
);
2674 defsubr (&Snext_overlay_change
);
2675 defsubr (&Soverlay_recenter
);
2676 defsubr (&Soverlay_lists
);
2677 defsubr (&Soverlay_get
);
2678 defsubr (&Soverlay_put
);
2683 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
2684 initial_define_key (control_x_map
, 'k', "kill-buffer");
2685 initial_define_key (control_x_map
, Ctl ('B'), "list-buffers");
2687 /* This must not be in syms_of_buffer, because Qdisabled is not
2688 initialized when that function gets called. */
2689 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);