1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include <sys/types.h>
26 #include <sys/param.h>
35 /* in 4.1, param.h fails to define this. */
36 #define MAXPATHLEN 1024
37 #endif /* not MAXPATHLEN */
44 #include "intervals.h"
49 #include "region-cache.h"
51 #include "blockinput.h"
56 struct buffer
*current_buffer
; /* the current buffer */
58 /* First buffer in chain of all buffers (in reverse order of creation).
59 Threaded through ->next. */
61 struct buffer
*all_buffers
;
63 /* This structure holds the default values of the buffer-local variables
64 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
65 The default value occupies the same slot in this structure
66 as an individual buffer's value occupies in that buffer.
67 Setting the default value also goes through the alist of buffers
68 and stores into each buffer that does not say it has a local value. */
70 struct buffer buffer_defaults
;
72 /* A Lisp_Object pointer to the above, used for staticpro */
74 static Lisp_Object Vbuffer_defaults
;
76 /* This structure marks which slots in a buffer have corresponding
77 default values in buffer_defaults.
78 Each such slot has a nonzero value in this structure.
79 The value has only one nonzero bit.
81 When a buffer has its own local value for a slot,
82 the entry for that slot (found in the same slot in this structure)
83 is turned on in the buffer's local_flags array.
85 If a slot in this structure is -1, then even though there may
86 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
87 and the corresponding slot in buffer_defaults is not used.
89 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
90 but there is a default value which is copied into each buffer.
92 If a slot in this structure is negative, then even though there may
93 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
94 and the corresponding slot in buffer_defaults is not used.
96 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
97 zero, that is a bug */
99 struct buffer buffer_local_flags
;
101 /* This structure holds the names of symbols whose values may be
102 buffer-local. It is indexed and accessed in the same way as the above. */
104 struct buffer buffer_local_symbols
;
105 /* A Lisp_Object pointer to the above, used for staticpro */
106 static Lisp_Object Vbuffer_local_symbols
;
108 /* This structure holds the required types for the values in the
109 buffer-local slots. If a slot contains Qnil, then the
110 corresponding buffer slot may contain a value of any type. If a
111 slot contains an integer, then prospective values' tags must be
112 equal to that integer (except nil is always allowed).
113 When a tag does not match, the function
114 buffer_slot_type_mismatch will signal an error.
116 If a slot here contains -1, the corresponding variable is read-only. */
117 struct buffer buffer_local_types
;
119 /* Flags indicating which built-in buffer-local variables
120 are permanent locals. */
121 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
123 /* Number of per-buffer variables used. */
125 int last_per_buffer_idx
;
127 Lisp_Object
Fset_buffer ();
128 void set_buffer_internal ();
129 void set_buffer_internal_1 ();
130 static void call_overlay_mod_hooks ();
131 static void swap_out_buffer_local_variables ();
132 static void reset_buffer_local_variables ();
134 /* Alist of all buffer names vs the buffers. */
135 /* This used to be a variable, but is no longer,
136 to prevent lossage due to user rplac'ing this alist or its elements. */
137 Lisp_Object Vbuffer_alist
;
139 /* Functions to call before and after each text change. */
140 Lisp_Object Vbefore_change_functions
;
141 Lisp_Object Vafter_change_functions
;
143 Lisp_Object Vtransient_mark_mode
;
145 /* t means ignore all read-only text properties.
146 A list means ignore such a property if its value is a member of the list.
147 Any non-nil value means ignore buffer-read-only. */
148 Lisp_Object Vinhibit_read_only
;
150 /* List of functions to call that can query about killing a buffer.
151 If any of these functions returns nil, we don't kill it. */
152 Lisp_Object Vkill_buffer_query_functions
;
154 /* List of functions to call before changing an unmodified buffer. */
155 Lisp_Object Vfirst_change_hook
;
157 Lisp_Object Qfirst_change_hook
;
158 Lisp_Object Qbefore_change_functions
;
159 Lisp_Object Qafter_change_functions
;
160 Lisp_Object Qucs_set_table_for_input
;
162 /* If nonzero, all modification hooks are suppressed. */
163 int inhibit_modification_hooks
;
165 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
167 Lisp_Object Qprotected_field
;
169 Lisp_Object QSFundamental
; /* A string "Fundamental" */
171 Lisp_Object Qkill_buffer_hook
;
173 Lisp_Object Qget_file_buffer
;
175 Lisp_Object Qoverlayp
;
177 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
179 Lisp_Object Qmodification_hooks
;
180 Lisp_Object Qinsert_in_front_hooks
;
181 Lisp_Object Qinsert_behind_hooks
;
183 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
184 static void free_buffer_text
P_ ((struct buffer
*b
));
185 static Lisp_Object copy_overlays
P_ ((struct buffer
*, Lisp_Object
));
186 static void modify_overlay
P_ ((struct buffer
*, int, int));
189 /* For debugging; temporary. See set_buffer_internal. */
190 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
197 error ("No buffer named %s", SDATA (spec
));
198 error ("Invalid buffer argument");
201 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
202 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
203 Value is nil if OBJECT is not a buffer or if it has been killed. */)
207 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
211 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
212 doc
: /* Return a list of all existing live buffers.
213 If the optional arg FRAME is a frame, we return the buffer list
214 in the proper order for that frame: the buffers in FRAME's `buffer-list'
215 frame parameter come first, followed by the rest of the buffers. */)
219 Lisp_Object framelist
, general
;
220 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
228 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
230 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
232 while (! NILP (tail
))
234 general
= Fdelq (XCAR (tail
), general
);
237 return nconc2 (framelist
, general
);
243 /* Like Fassoc, but use Fstring_equal to compare
244 (which ignores text properties),
245 and don't ever QUIT. */
248 assoc_ignore_text_properties (key
, list
)
249 register Lisp_Object key
;
252 register Lisp_Object tail
;
253 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
255 register Lisp_Object elt
, tem
;
257 tem
= Fstring_equal (Fcar (elt
), key
);
264 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
265 doc
: /* Return the buffer named NAME (a string).
266 If there is no live buffer named NAME, return nil.
267 NAME may also be a buffer; if so, the value is that buffer. */)
269 register Lisp_Object name
;
275 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
278 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
279 doc
: /* Return the buffer visiting file FILENAME (a string).
280 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
281 If there is no such live buffer, return nil.
282 See also `find-buffer-visiting'. */)
284 register Lisp_Object filename
;
286 register Lisp_Object tail
, buf
, tem
;
289 CHECK_STRING (filename
);
290 filename
= Fexpand_file_name (filename
, Qnil
);
292 /* If the file name has special constructs in it,
293 call the corresponding file handler. */
294 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
296 return call2 (handler
, Qget_file_buffer
, filename
);
298 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
300 buf
= Fcdr (XCAR (tail
));
301 if (!BUFFERP (buf
)) continue;
302 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
303 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
311 get_truename_buffer (filename
)
312 register Lisp_Object filename
;
314 register Lisp_Object tail
, buf
, tem
;
316 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
318 buf
= Fcdr (XCAR (tail
));
319 if (!BUFFERP (buf
)) continue;
320 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
321 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
328 /* Incremented for each buffer created, to assign the buffer number. */
331 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
332 doc
: /* Return the buffer named NAME, or create such a buffer and return it.
333 A new buffer is created if there is no live buffer named NAME.
334 If NAME starts with a space, the new buffer does not keep undo information.
335 If NAME is a buffer instead of a string, then it is the value returned.
336 The value is never nil. */)
338 register Lisp_Object name
;
340 register Lisp_Object buf
;
341 register struct buffer
*b
;
343 buf
= Fget_buffer (name
);
347 if (SCHARS (name
) == 0)
348 error ("Empty string for buffer name is not allowed");
350 b
= (struct buffer
*) allocate_buffer ();
352 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
354 /* An ordinary buffer uses its own struct buffer_text. */
355 b
->text
= &b
->own_text
;
358 BUF_GAP_SIZE (b
) = 20;
360 /* We allocate extra 1-byte at the tail and keep it always '\0' for
361 anchoring a search. */
362 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
364 if (! BUF_BEG_ADDR (b
))
365 buffer_memory_full ();
372 BUF_PT_BYTE (b
) = BEG_BYTE
;
373 BUF_GPT_BYTE (b
) = BEG_BYTE
;
374 BUF_BEGV_BYTE (b
) = BEG_BYTE
;
375 BUF_ZV_BYTE (b
) = BEG_BYTE
;
376 BUF_Z_BYTE (b
) = BEG_BYTE
;
378 BUF_OVERLAY_MODIFF (b
) = 1;
379 BUF_SAVE_MODIFF (b
) = 1;
380 BUF_INTERVALS (b
) = 0;
381 BUF_UNCHANGED_MODIFIED (b
) = 1;
382 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
383 BUF_END_UNCHANGED (b
) = 0;
384 BUF_BEG_UNCHANGED (b
) = 0;
385 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
387 b
->newline_cache
= 0;
388 b
->width_run_cache
= 0;
389 b
->width_table
= Qnil
;
390 b
->prevent_redisplay_optimizations_p
= 1;
392 /* Put this on the chain of all buffers including killed ones. */
393 b
->next
= all_buffers
;
396 /* An ordinary buffer normally doesn't need markers
397 to handle BEGV and ZV. */
399 b
->begv_marker
= Qnil
;
402 name
= Fcopy_sequence (name
);
403 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
406 if (SREF (name
, 0) != ' ')
412 reset_buffer_local_variables (b
, 1);
414 b
->mark
= Fmake_marker ();
415 BUF_MARKERS (b
) = Qnil
;
418 /* Put this in the alist of all live buffers. */
420 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
422 /* Fixme: Protect against errors, which would trigger infinite
424 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
425 /* buff is on buffer-alist, so no gcpro */
426 call1 (Qucs_set_table_for_input
, buf
);
432 /* Return a list of overlays which is a copy of the overlay list
433 LIST, but for buffer B. */
436 copy_overlays (b
, list
)
440 Lisp_Object result
, buffer
;
442 XSETBUFFER (buffer
, b
);
444 for (result
= Qnil
; CONSP (list
); list
= XCDR (list
))
446 Lisp_Object overlay
, start
, end
, old_overlay
;
449 old_overlay
= XCAR (list
);
450 charpos
= marker_position (OVERLAY_START (old_overlay
));
451 start
= Fmake_marker ();
452 Fset_marker (start
, make_number (charpos
), buffer
);
453 XMARKER (start
)->insertion_type
454 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
456 charpos
= marker_position (OVERLAY_END (old_overlay
));
457 end
= Fmake_marker ();
458 Fset_marker (end
, make_number (charpos
), buffer
);
459 XMARKER (end
)->insertion_type
460 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
462 overlay
= allocate_misc ();
463 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
464 OVERLAY_START (overlay
) = start
;
465 OVERLAY_END (overlay
) = end
;
466 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
468 result
= Fcons (overlay
, result
);
471 return Fnreverse (result
);
475 /* Clone per-buffer values of buffer FROM.
477 Buffer TO gets the same per-buffer values as FROM, with the
478 following exceptions: (1) TO's name is left untouched, (2) markers
479 are copied and made to refer to TO, and (3) overlay lists are
483 clone_per_buffer_values (from
, to
)
484 struct buffer
*from
, *to
;
486 Lisp_Object to_buffer
;
489 XSETBUFFER (to_buffer
, to
);
491 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
493 offset
+= sizeof (Lisp_Object
))
497 obj
= PER_BUFFER_VALUE (from
, offset
);
500 struct Lisp_Marker
*m
= XMARKER (obj
);
501 obj
= Fmake_marker ();
502 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
503 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
506 PER_BUFFER_VALUE (to
, offset
) = obj
;
509 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
511 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
512 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
516 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
518 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
519 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
520 BASE-BUFFER should be an existing buffer (or buffer name).
521 NAME should be a string which is not the name of an existing buffer.
522 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
523 such as major and minor modes, in the indirect buffer.
524 CLONE nil means the indirect buffer's state is reset to default values. */)
525 (base_buffer
, name
, clone
)
526 Lisp_Object base_buffer
, name
, clone
;
531 buf
= Fget_buffer (name
);
533 error ("Buffer name `%s' is in use", SDATA (name
));
535 base_buffer
= Fget_buffer (base_buffer
);
536 if (NILP (base_buffer
))
537 error ("No such buffer: `%s'", SDATA (name
));
539 if (SCHARS (name
) == 0)
540 error ("Empty string for buffer name is not allowed");
542 b
= (struct buffer
*) allocate_buffer ();
543 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
545 if (XBUFFER (base_buffer
)->base_buffer
)
546 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
548 b
->base_buffer
= XBUFFER (base_buffer
);
550 /* Use the base buffer's text object. */
551 b
->text
= b
->base_buffer
->text
;
553 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
554 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
555 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
556 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
557 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
558 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
560 b
->newline_cache
= 0;
561 b
->width_run_cache
= 0;
562 b
->width_table
= Qnil
;
564 /* Put this on the chain of all buffers including killed ones. */
565 b
->next
= all_buffers
;
568 name
= Fcopy_sequence (name
);
569 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
573 reset_buffer_local_variables (b
, 1);
575 /* Put this in the alist of all live buffers. */
577 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
579 b
->mark
= Fmake_marker ();
582 /* The multibyte status belongs to the base buffer. */
583 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
585 /* Make sure the base buffer has markers for its narrowing. */
586 if (NILP (b
->base_buffer
->pt_marker
))
588 b
->base_buffer
->pt_marker
= Fmake_marker ();
589 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
590 BUF_PT (b
->base_buffer
),
591 BUF_PT_BYTE (b
->base_buffer
));
593 if (NILP (b
->base_buffer
->begv_marker
))
595 b
->base_buffer
->begv_marker
= Fmake_marker ();
596 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
597 BUF_BEGV (b
->base_buffer
),
598 BUF_BEGV_BYTE (b
->base_buffer
));
600 if (NILP (b
->base_buffer
->zv_marker
))
602 b
->base_buffer
->zv_marker
= Fmake_marker ();
603 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
604 BUF_ZV (b
->base_buffer
),
605 BUF_ZV_BYTE (b
->base_buffer
));
606 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
611 /* Give the indirect buffer markers for its narrowing. */
612 b
->pt_marker
= Fmake_marker ();
613 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
614 b
->begv_marker
= Fmake_marker ();
615 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
616 b
->zv_marker
= Fmake_marker ();
617 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
618 XMARKER (b
->zv_marker
)->insertion_type
= 1;
621 clone_per_buffer_values (b
->base_buffer
, b
);
626 /* Reinitialize everything about a buffer except its name and contents
627 and local variables. */
631 register struct buffer
*b
;
634 b
->file_truename
= Qnil
;
635 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
637 XSETFASTINT (b
->save_length
, 0);
638 b
->last_window_start
= 1;
639 /* It is more conservative to start out "changed" than "unchanged". */
641 b
->prevent_redisplay_optimizations_p
= 1;
643 b
->auto_save_modified
= 0;
644 b
->auto_save_failure_time
= -1;
645 b
->auto_save_file_name
= Qnil
;
647 b
->overlays_before
= Qnil
;
648 b
->overlays_after
= Qnil
;
649 XSETFASTINT (b
->overlay_center
, 1);
650 b
->mark_active
= Qnil
;
651 b
->point_before_scroll
= Qnil
;
652 b
->file_format
= Qnil
;
653 b
->last_selected_window
= Qnil
;
654 XSETINT (b
->display_count
, 0);
655 b
->display_time
= Qnil
;
656 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
657 b
->cursor_type
= buffer_defaults
.cursor_type
;
658 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
660 b
->display_error_modiff
= 0;
663 /* Reset buffer B's local variables info.
664 Don't use this on a buffer that has already been in use;
665 it does not treat permanent locals consistently.
666 Instead, use Fkill_all_local_variables.
668 If PERMANENT_TOO is 1, then we reset permanent built-in
669 buffer-local variables. If PERMANENT_TOO is 0,
670 we preserve those. */
673 reset_buffer_local_variables (b
, permanent_too
)
674 register struct buffer
*b
;
680 /* Reset the major mode to Fundamental, together with all the
681 things that depend on the major mode.
682 default-major-mode is handled at a higher level.
683 We ignore it here. */
684 b
->major_mode
= Qfundamental_mode
;
686 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
687 b
->mode_name
= QSFundamental
;
688 b
->minor_modes
= Qnil
;
690 /* If the standard case table has been altered and invalidated,
691 fix up its insides first. */
692 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
693 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
694 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
695 Fset_standard_case_table (Vascii_downcase_table
);
697 b
->downcase_table
= Vascii_downcase_table
;
698 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
699 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
700 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
701 b
->invisibility_spec
= Qt
;
703 b
->buffer_file_type
= Qnil
;
706 /* Reset all (or most) per-buffer variables to their defaults. */
707 b
->local_var_alist
= Qnil
;
708 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
709 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
710 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
712 /* For each slot that has a default value,
713 copy that into the slot. */
715 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
717 offset
+= sizeof (Lisp_Object
))
719 int idx
= PER_BUFFER_IDX (offset
);
722 || buffer_permanent_local_flags
[idx
] == 0))
723 /* Is -2 used anywhere? */
725 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
729 /* We split this away from generate-new-buffer, because rename-buffer
730 and set-visited-file-name ought to be able to use this to really
731 rename the buffer properly. */
733 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
735 doc
: /* Return a string that is the name of no existing buffer based on NAME.
736 If there is no live buffer named NAME, then return NAME.
737 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
738 until an unused name is found, and then return that name.
739 Optional second argument IGNORE specifies a name that is okay to use
740 \(if it is in the sequence to be tried)
741 even if a buffer with that name exists. */)
743 register Lisp_Object name
, ignore
;
745 register Lisp_Object gentemp
, tem
;
751 tem
= Fget_buffer (name
);
758 sprintf (number
, "<%d>", ++count
);
759 gentemp
= concat2 (name
, build_string (number
));
760 tem
= Fstring_equal (gentemp
, ignore
);
763 tem
= Fget_buffer (gentemp
);
770 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
771 doc
: /* Return the name of BUFFER, as a string.
772 With no argument or nil as argument, return the name of the current buffer. */)
774 register Lisp_Object buffer
;
777 return current_buffer
->name
;
778 CHECK_BUFFER (buffer
);
779 return XBUFFER (buffer
)->name
;
782 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
783 doc
: /* Return name of file BUFFER is visiting, or nil if none.
784 No argument or nil as argument means use the current buffer. */)
786 register Lisp_Object buffer
;
789 return current_buffer
->filename
;
790 CHECK_BUFFER (buffer
);
791 return XBUFFER (buffer
)->filename
;
794 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
796 doc
: /* Return the base buffer of indirect buffer BUFFER.
797 If BUFFER is not indirect, return nil. */)
799 register Lisp_Object buffer
;
802 Lisp_Object base_buffer
;
805 base
= current_buffer
->base_buffer
;
808 CHECK_BUFFER (buffer
);
809 base
= XBUFFER (buffer
)->base_buffer
;
814 XSETBUFFER (base_buffer
, base
);
818 DEFUN ("buffer-local-value", Fbuffer_local_value
,
819 Sbuffer_local_value
, 2, 2, 0,
820 doc
: /* Return the value of VARIABLE in BUFFER.
821 If VARIABLE does not have a buffer-local binding in BUFFER, the value
822 is the default binding of variable. */)
824 register Lisp_Object symbol
;
825 register Lisp_Object buffer
;
827 register struct buffer
*buf
;
828 register Lisp_Object result
;
830 CHECK_SYMBOL (symbol
);
831 CHECK_BUFFER (buffer
);
832 buf
= XBUFFER (buffer
);
834 /* Look in local_var_list */
835 result
= Fassoc (symbol
, buf
->local_var_alist
);
841 /* Look in special slots */
842 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
843 offset
< sizeof (struct buffer
);
844 /* sizeof EMACS_INT == sizeof Lisp_Object */
845 offset
+= (sizeof (EMACS_INT
)))
847 idx
= PER_BUFFER_IDX (offset
);
848 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
849 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
850 && EQ (PER_BUFFER_SYMBOL (offset
), symbol
))
852 result
= PER_BUFFER_VALUE (buf
, offset
);
859 result
= Fdefault_value (symbol
);
863 Lisp_Object valcontents
;
864 Lisp_Object current_alist_element
;
866 /* What binding is loaded right now? */
867 valcontents
= SYMBOL_VALUE (symbol
);
868 current_alist_element
869 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
871 /* The value of the currently loaded binding is not
872 stored in it, but rather in the realvalue slot.
873 Store that value into the binding it belongs to
874 in case that is the one we are about to use. */
876 Fsetcdr (current_alist_element
,
877 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
879 /* Now get the (perhaps updated) value out of the binding. */
880 result
= XCDR (result
);
883 if (EQ (result
, Qunbound
))
884 return Fsignal (Qvoid_variable
, Fcons (symbol
, Qnil
));
889 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
890 Sbuffer_local_variables
, 0, 1, 0,
891 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
892 Most elements look like (SYMBOL . VALUE), describing one variable.
893 For a symbol that is locally unbound, just the symbol appears in the value.
894 Note that storing new VALUEs in these elements doesn't change the variables.
895 No argument or nil as argument means use current buffer as BUFFER. */)
897 register Lisp_Object buffer
;
899 register struct buffer
*buf
;
900 register Lisp_Object result
;
903 buf
= current_buffer
;
906 CHECK_BUFFER (buffer
);
907 buf
= XBUFFER (buffer
);
913 register Lisp_Object tail
;
914 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
916 Lisp_Object val
, elt
;
920 /* Reference each variable in the alist in buf.
921 If inquiring about the current buffer, this gets the current values,
922 so store them into the alist so the alist is up to date.
923 If inquiring about some other buffer, this swaps out any values
924 for that buffer, making the alist up to date automatically. */
925 val
= find_symbol_value (XCAR (elt
));
926 /* Use the current buffer value only if buf is the current buffer. */
927 if (buf
!= current_buffer
)
930 /* If symbol is unbound, put just the symbol in the list. */
931 if (EQ (val
, Qunbound
))
932 result
= Fcons (XCAR (elt
), result
);
933 /* Otherwise, put (symbol . value) in the list. */
935 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
939 /* Add on all the variables stored in special slots. */
943 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
944 offset
< sizeof (struct buffer
);
945 /* sizeof EMACS_INT == sizeof Lisp_Object */
946 offset
+= (sizeof (EMACS_INT
)))
948 idx
= PER_BUFFER_IDX (offset
);
949 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
950 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
951 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
952 PER_BUFFER_VALUE (buf
, offset
)),
961 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
963 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
964 No argument or nil as argument means use current buffer as BUFFER. */)
966 register Lisp_Object buffer
;
968 register struct buffer
*buf
;
970 buf
= current_buffer
;
973 CHECK_BUFFER (buffer
);
974 buf
= XBUFFER (buffer
);
977 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
980 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
982 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
983 A non-nil FLAG means mark the buffer modified. */)
985 register Lisp_Object flag
;
987 register int already
;
988 register Lisp_Object fn
;
989 Lisp_Object buffer
, window
;
991 #ifdef CLASH_DETECTION
992 /* If buffer becoming modified, lock the file.
993 If buffer becoming unmodified, unlock the file. */
995 fn
= current_buffer
->file_truename
;
996 /* Test buffer-file-name so that binding it to nil is effective. */
997 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
999 already
= SAVE_MODIFF
< MODIFF
;
1000 if (!already
&& !NILP (flag
))
1002 else if (already
&& NILP (flag
))
1005 #endif /* CLASH_DETECTION */
1007 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1009 /* Set update_mode_lines only if buffer is displayed in some window.
1010 Packages like jit-lock or lazy-lock preserve a buffer's modified
1011 state by recording/restoring the state around blocks of code.
1012 Setting update_mode_lines makes redisplay consider all windows
1013 (on all frames). Stealth fontification of buffers not displayed
1014 would incur additional redisplay costs if we'd set
1015 update_modes_lines unconditionally.
1017 Ideally, I think there should be another mechanism for fontifying
1018 buffers without "modifying" buffers, or redisplay should be
1019 smarter about updating the `*' in mode lines. --gerd */
1020 XSETBUFFER (buffer
, current_buffer
);
1021 window
= Fget_buffer_window (buffer
, Qt
);
1022 if (WINDOWP (window
))
1024 ++update_mode_lines
;
1025 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1031 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1032 Srestore_buffer_modified_p
, 1, 1, 0,
1033 doc
: /* Like `set-buffer-modified-p', with a differences concerning redisplay.
1034 It is not ensured that mode lines will be updated to show the modified
1035 state of the current buffer. Use with care. */)
1039 #ifdef CLASH_DETECTION
1042 /* If buffer becoming modified, lock the file.
1043 If buffer becoming unmodified, unlock the file. */
1045 fn
= current_buffer
->file_truename
;
1046 /* Test buffer-file-name so that binding it to nil is effective. */
1047 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1049 int already
= SAVE_MODIFF
< MODIFF
;
1050 if (!already
&& !NILP (flag
))
1052 else if (already
&& NILP (flag
))
1055 #endif /* CLASH_DETECTION */
1057 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1061 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1063 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1064 Each buffer has a tick counter which is incremented each time the text in
1065 that buffer is changed. It wraps around occasionally.
1066 No argument or nil as argument means use current buffer as BUFFER. */)
1068 register Lisp_Object buffer
;
1070 register struct buffer
*buf
;
1072 buf
= current_buffer
;
1075 CHECK_BUFFER (buffer
);
1076 buf
= XBUFFER (buffer
);
1079 return make_number (BUF_MODIFF (buf
));
1082 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1083 "sRename buffer (to new name): \nP",
1084 doc
: /* Change current buffer's name to NEWNAME (a string).
1085 If second arg UNIQUE is nil or omitted, it is an error if a
1086 buffer named NEWNAME already exists.
1087 If UNIQUE is non-nil, come up with a new name using
1088 `generate-new-buffer-name'.
1089 Interactively, you can set UNIQUE with a prefix argument.
1090 We return the name we actually gave the buffer.
1091 This does not change the name of the visited file (if any). */)
1093 register Lisp_Object newname
, unique
;
1095 register Lisp_Object tem
, buf
;
1097 CHECK_STRING (newname
);
1099 if (SCHARS (newname
) == 0)
1100 error ("Empty string is invalid as a buffer name");
1102 tem
= Fget_buffer (newname
);
1105 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1106 rename the buffer automatically so you can create another
1107 with the original name. It makes UNIQUE equivalent to
1108 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1109 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1110 return current_buffer
->name
;
1112 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1114 error ("Buffer name `%s' is in use", SDATA (newname
));
1117 current_buffer
->name
= newname
;
1119 /* Catch redisplay's attention. Unless we do this, the mode lines for
1120 any windows displaying current_buffer will stay unchanged. */
1121 update_mode_lines
++;
1123 XSETBUFFER (buf
, current_buffer
);
1124 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1125 if (NILP (current_buffer
->filename
)
1126 && !NILP (current_buffer
->auto_save_file_name
))
1127 call0 (intern ("rename-auto-save-file"));
1128 /* Refetch since that last call may have done GC. */
1129 return current_buffer
->name
;
1132 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1133 doc
: /* Return most recently selected buffer other than BUFFER.
1134 Buffers not visible in windows are preferred to visible buffers,
1135 unless optional second argument VISIBLE-OK is non-nil.
1136 If the optional third argument FRAME is non-nil, use that frame's
1137 buffer list instead of the selected frame's buffer list.
1138 If no other buffer exists, the buffer `*scratch*' is returned.
1139 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1140 (buffer
, visible_ok
, frame
)
1141 register Lisp_Object buffer
, visible_ok
, frame
;
1143 Lisp_Object
Fset_buffer_major_mode ();
1144 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1148 frame
= selected_frame
;
1150 tail
= Vbuffer_alist
;
1151 pred
= frame_buffer_predicate (frame
);
1153 /* Consider buffers that have been seen in the selected frame
1154 before other buffers. */
1156 tem
= frame_buffer_list (frame
);
1160 if (BUFFERP (XCAR (tem
)))
1161 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1164 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1166 for (; CONSP (tail
); tail
= XCDR (tail
))
1168 buf
= Fcdr (XCAR (tail
));
1169 if (EQ (buf
, buffer
))
1171 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1173 /* If the selected frame has a buffer_predicate,
1174 disregard buffers that don't fit the predicate. */
1177 tem
= call1 (pred
, buf
);
1182 if (NILP (visible_ok
))
1183 tem
= Fget_buffer_window (buf
, Qvisible
);
1188 if (NILP (notsogood
))
1191 if (!NILP (notsogood
))
1193 buf
= Fget_buffer (build_string ("*scratch*"));
1196 buf
= Fget_buffer_create (build_string ("*scratch*"));
1197 Fset_buffer_major_mode (buf
);
1202 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
1204 doc
: /* Make BUFFER stop keeping undo information.
1205 No argument or nil as argument means do this for the current buffer. */)
1207 register Lisp_Object buffer
;
1209 Lisp_Object real_buffer
;
1212 XSETBUFFER (real_buffer
, current_buffer
);
1215 real_buffer
= Fget_buffer (buffer
);
1216 if (NILP (real_buffer
))
1220 XBUFFER (real_buffer
)->undo_list
= Qt
;
1225 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1227 doc
: /* Start keeping undo information for buffer BUFFER.
1228 No argument or nil as argument means do this for the current buffer. */)
1230 register Lisp_Object buffer
;
1232 Lisp_Object real_buffer
;
1235 XSETBUFFER (real_buffer
, current_buffer
);
1238 real_buffer
= Fget_buffer (buffer
);
1239 if (NILP (real_buffer
))
1243 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1244 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1250 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1251 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1252 The buffer being killed will be current while the hook is running.\n\
1255 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1256 doc
: /* Kill the buffer BUFFER.
1257 The argument may be a buffer or may be the name of a buffer.
1258 An argument of nil means kill the current buffer.
1260 Value is t if the buffer is actually killed, nil if user says no.
1262 The value of `kill-buffer-hook' (which may be local to that buffer),
1263 if not void, is a list of functions to be called, with no arguments,
1264 before the buffer is actually killed. The buffer to be killed is current
1265 when the hook functions are called.
1267 Any processes that have this buffer as the `process-buffer' are killed
1273 register struct buffer
*b
;
1274 register Lisp_Object tem
;
1275 register struct Lisp_Marker
*m
;
1276 struct gcpro gcpro1
;
1279 buf
= Fcurrent_buffer ();
1281 buf
= Fget_buffer (buffer
);
1287 /* Avoid trouble for buffer already dead. */
1291 /* Query if the buffer is still modified. */
1292 if (INTERACTIVE
&& !NILP (b
->filename
)
1293 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1296 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1297 b
->name
, make_number (0)));
1303 /* Run hooks with the buffer to be killed the current buffer. */
1305 int count
= SPECPDL_INDEX ();
1308 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1309 set_buffer_internal (b
);
1311 /* First run the query functions; if any query is answered no,
1312 don't kill the buffer. */
1313 for (list
= Vkill_buffer_query_functions
; CONSP (list
); list
= XCDR (list
))
1315 tem
= call0 (XCAR (list
));
1317 return unbind_to (count
, Qnil
);
1320 /* Then run the hooks. */
1321 Frun_hooks (1, &Qkill_buffer_hook
);
1322 unbind_to (count
, Qnil
);
1325 /* We have no more questions to ask. Verify that it is valid
1326 to kill the buffer. This must be done after the questions
1327 since anything can happen within do_yes_or_no_p. */
1329 /* Don't kill the minibuffer now current. */
1330 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1336 /* When we kill a base buffer, kill all its indirect buffers.
1337 We do it at this stage so nothing terrible happens if they
1338 ask questions or their hooks get errors. */
1339 if (! b
->base_buffer
)
1341 struct buffer
*other
;
1345 for (other
= all_buffers
; other
; other
= other
->next
)
1346 /* all_buffers contains dead buffers too;
1347 don't re-kill them. */
1348 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1351 XSETBUFFER (buf
, other
);
1358 /* Make this buffer not be current.
1359 In the process, notice if this is the sole visible buffer
1360 and give up if so. */
1361 if (b
== current_buffer
)
1363 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1365 if (b
== current_buffer
)
1369 /* Notice if the buffer to kill is the sole visible buffer
1370 when we're currently in the mini-buffer, and give up if so. */
1371 XSETBUFFER (tem
, current_buffer
);
1372 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1374 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1379 /* Now there is no question: we can kill the buffer. */
1381 #ifdef CLASH_DETECTION
1382 /* Unlock this buffer's file, if it is locked. */
1384 #endif /* CLASH_DETECTION */
1386 kill_buffer_processes (buf
);
1388 tem
= Vinhibit_quit
;
1390 replace_buffer_in_all_windows (buf
);
1391 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1392 frames_discard_buffer (buf
);
1393 Vinhibit_quit
= tem
;
1395 /* Delete any auto-save file, if we saved it in this session.
1396 But not if the buffer is modified. */
1397 if (STRINGP (b
->auto_save_file_name
)
1398 && b
->auto_save_modified
!= 0
1399 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1400 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
))
1403 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1405 internal_delete_file (b
->auto_save_file_name
);
1410 /* Unchain all markers that belong to this indirect buffer.
1411 Don't unchain the markers that belong to the base buffer
1412 or its other indirect buffers. */
1413 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1419 unchain_marker (tem
);
1425 /* Unchain all markers of this buffer and its indirect buffers.
1426 and leave them pointing nowhere. */
1427 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1434 BUF_MARKERS (b
) = Qnil
;
1435 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1437 /* Perhaps we should explicitly free the interval tree here... */
1440 /* Reset the local variables, so that this buffer's local values
1441 won't be protected from GC. They would be protected
1442 if they happened to remain encached in their symbols.
1443 This gets rid of them for certain. */
1444 swap_out_buffer_local_variables (b
);
1445 reset_buffer_local_variables (b
, 1);
1450 if (! b
->base_buffer
)
1451 free_buffer_text (b
);
1453 if (b
->newline_cache
)
1455 free_region_cache (b
->newline_cache
);
1456 b
->newline_cache
= 0;
1458 if (b
->width_run_cache
)
1460 free_region_cache (b
->width_run_cache
);
1461 b
->width_run_cache
= 0;
1463 b
->width_table
= Qnil
;
1465 b
->undo_list
= Qnil
;
1470 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1471 we do this each time BUF is selected visibly, the more recently
1472 selected buffers are always closer to the front of the list. This
1473 means that other_buffer is more likely to choose a relevant buffer. */
1479 register Lisp_Object link
, prev
;
1481 frame
= selected_frame
;
1484 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1486 if (EQ (XCDR (XCAR (link
)), buf
))
1491 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1492 we cannot use Fdelq itself here because it allows quitting. */
1495 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1497 XSETCDR (prev
, XCDR (XCDR (prev
)));
1499 XSETCDR (link
, Vbuffer_alist
);
1500 Vbuffer_alist
= link
;
1502 /* Now move this buffer to the front of frame_buffer_list also. */
1505 for (link
= frame_buffer_list (frame
); CONSP (link
);
1508 if (EQ (XCAR (link
), buf
))
1513 /* Effectively do delq. */
1518 set_frame_buffer_list (frame
,
1519 XCDR (frame_buffer_list (frame
)));
1521 XSETCDR (prev
, XCDR (XCDR (prev
)));
1523 XSETCDR (link
, frame_buffer_list (frame
));
1524 set_frame_buffer_list (frame
, link
);
1527 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1530 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1531 doc
: /* Set an appropriate major mode for BUFFER.
1532 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1533 according to `default-major-mode'.
1534 Use this function before selecting the buffer, since it may need to inspect
1535 the current buffer's major mode. */)
1540 Lisp_Object function
;
1542 if (STRINGP (XBUFFER (buffer
)->name
)
1543 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1544 function
= find_symbol_value (intern ("initial-major-mode"));
1547 function
= buffer_defaults
.major_mode
;
1549 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1550 function
= current_buffer
->major_mode
;
1553 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1556 count
= SPECPDL_INDEX ();
1558 /* To select a nonfundamental mode,
1559 select the buffer temporarily and then call the mode function. */
1561 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1563 Fset_buffer (buffer
);
1566 return unbind_to (count
, Qnil
);
1569 /* If switching buffers in WINDOW would be an error, return
1570 a C string saying what the error would be. */
1573 no_switch_window (window
)
1577 if (EQ (minibuf_window
, window
))
1578 return "Cannot switch buffers in minibuffer window";
1579 tem
= Fwindow_dedicated_p (window
);
1581 return "Cannot switch buffers in a dedicated window";
1585 /* Switch to buffer BUFFER in the selected window.
1586 If NORECORD is non-nil, don't call record_buffer. */
1589 switch_to_buffer_1 (buffer
, norecord
)
1590 Lisp_Object buffer
, norecord
;
1592 register Lisp_Object buf
;
1595 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1598 buf
= Fget_buffer (buffer
);
1601 buf
= Fget_buffer_create (buffer
);
1602 Fset_buffer_major_mode (buf
);
1606 if (NILP (norecord
))
1607 record_buffer (buf
);
1609 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1610 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1617 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1618 doc
: /* Select buffer BUFFER in the current window.
1619 BUFFER may be a buffer or a buffer name.
1620 Optional second arg NORECORD non-nil means
1621 do not put this buffer at the front of the list of recently selected ones.
1623 WARNING: This is NOT the way to work on another buffer temporarily
1624 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1625 the window-buffer correspondences. */)
1627 Lisp_Object buffer
, norecord
;
1631 err
= no_switch_window (selected_window
);
1632 if (err
) error (err
);
1634 return switch_to_buffer_1 (buffer
, norecord
);
1637 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1638 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1639 If BUFFER is nil, then some other buffer is chosen.
1640 If `pop-up-windows' is non-nil, windows can be split to do this.
1641 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1642 window even if BUFFER is already visible in the selected window.
1643 This uses the function `display-buffer' as a subroutine; see the documentation
1644 of `display-buffer' for additional customization information.
1646 Optional third arg NORECORD non-nil means
1647 do not put this buffer at the front of the list of recently selected ones. */)
1648 (buffer
, other_window
, norecord
)
1649 Lisp_Object buffer
, other_window
, norecord
;
1651 register Lisp_Object buf
;
1653 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1656 buf
= Fget_buffer (buffer
);
1659 buf
= Fget_buffer_create (buffer
);
1660 Fset_buffer_major_mode (buf
);
1664 if (NILP (norecord
))
1665 /* This seems bogus since Fselect_window will call record_buffer anyway. */
1666 record_buffer (buf
);
1667 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1671 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1672 doc
: /* Return the current buffer as a Lisp object. */)
1675 register Lisp_Object buf
;
1676 XSETBUFFER (buf
, current_buffer
);
1680 /* Set the current buffer to B.
1682 We previously set windows_or_buffers_changed here to invalidate
1683 global unchanged information in beg_unchanged and end_unchanged.
1684 This is no longer necessary because we now compute unchanged
1685 information on a buffer-basis. Every action affecting other
1686 windows than the selected one requires a select_window at some
1687 time, and that increments windows_or_buffers_changed. */
1690 set_buffer_internal (b
)
1691 register struct buffer
*b
;
1693 if (current_buffer
!= b
)
1694 set_buffer_internal_1 (b
);
1697 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1698 This is used by redisplay. */
1701 set_buffer_internal_1 (b
)
1702 register struct buffer
*b
;
1704 register struct buffer
*old_buf
;
1705 register Lisp_Object tail
, valcontents
;
1708 #ifdef USE_MMAP_FOR_BUFFERS
1709 if (b
->text
->beg
== NULL
)
1710 enlarge_buffer_text (b
, 0);
1711 #endif /* USE_MMAP_FOR_BUFFERS */
1713 if (current_buffer
== b
)
1716 old_buf
= current_buffer
;
1718 last_known_column_point
= -1; /* invalidate indentation cache */
1722 /* Put the undo list back in the base buffer, so that it appears
1723 that an indirect buffer shares the undo list of its base. */
1724 if (old_buf
->base_buffer
)
1725 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1727 /* If the old current buffer has markers to record PT, BEGV and ZV
1728 when it is not current, update them now. */
1729 if (! NILP (old_buf
->pt_marker
))
1732 XSETBUFFER (obuf
, old_buf
);
1733 set_marker_both (old_buf
->pt_marker
, obuf
,
1734 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1736 if (! NILP (old_buf
->begv_marker
))
1739 XSETBUFFER (obuf
, old_buf
);
1740 set_marker_both (old_buf
->begv_marker
, obuf
,
1741 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1743 if (! NILP (old_buf
->zv_marker
))
1746 XSETBUFFER (obuf
, old_buf
);
1747 set_marker_both (old_buf
->zv_marker
, obuf
,
1748 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1752 /* Get the undo list from the base buffer, so that it appears
1753 that an indirect buffer shares the undo list of its base. */
1755 b
->undo_list
= b
->base_buffer
->undo_list
;
1757 /* If the new current buffer has markers to record PT, BEGV and ZV
1758 when it is not current, fetch them now. */
1759 if (! NILP (b
->pt_marker
))
1761 BUF_PT (b
) = marker_position (b
->pt_marker
);
1762 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1764 if (! NILP (b
->begv_marker
))
1766 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1767 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1769 if (! NILP (b
->zv_marker
))
1771 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1772 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1775 /* Look down buffer's list of local Lisp variables
1776 to find and update any that forward into C variables. */
1778 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1780 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1781 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1782 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1783 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1784 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1785 /* Just reference the variable
1786 to cause it to become set for this buffer. */
1787 Fsymbol_value (XCAR (XCAR (tail
)));
1790 /* Do the same with any others that were local to the previous buffer */
1793 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1795 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1796 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1797 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1798 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1799 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1800 /* Just reference the variable
1801 to cause it to become set for this buffer. */
1802 Fsymbol_value (XCAR (XCAR (tail
)));
1806 /* Switch to buffer B temporarily for redisplay purposes.
1807 This avoids certain things that don't need to be done within redisplay. */
1813 register struct buffer
*old_buf
;
1815 if (current_buffer
== b
)
1818 old_buf
= current_buffer
;
1823 /* If the old current buffer has markers to record PT, BEGV and ZV
1824 when it is not current, update them now. */
1825 if (! NILP (old_buf
->pt_marker
))
1828 XSETBUFFER (obuf
, old_buf
);
1829 set_marker_both (old_buf
->pt_marker
, obuf
,
1830 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1832 if (! NILP (old_buf
->begv_marker
))
1835 XSETBUFFER (obuf
, old_buf
);
1836 set_marker_both (old_buf
->begv_marker
, obuf
,
1837 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1839 if (! NILP (old_buf
->zv_marker
))
1842 XSETBUFFER (obuf
, old_buf
);
1843 set_marker_both (old_buf
->zv_marker
, obuf
,
1844 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1848 /* If the new current buffer has markers to record PT, BEGV and ZV
1849 when it is not current, fetch them now. */
1850 if (! NILP (b
->pt_marker
))
1852 BUF_PT (b
) = marker_position (b
->pt_marker
);
1853 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1855 if (! NILP (b
->begv_marker
))
1857 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1858 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1860 if (! NILP (b
->zv_marker
))
1862 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1863 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1867 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1868 doc
: /* Make the buffer BUFFER current for editing operations.
1869 BUFFER may be a buffer or the name of an existing buffer.
1870 See also `save-excursion' when you want to make a buffer current temporarily.
1871 This function does not display the buffer, so its effect ends
1872 when the current command terminates.
1873 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1875 register Lisp_Object buffer
;
1877 register Lisp_Object buf
;
1878 buf
= Fget_buffer (buffer
);
1881 if (NILP (XBUFFER (buf
)->name
))
1882 error ("Selecting deleted buffer");
1883 set_buffer_internal (XBUFFER (buf
));
1887 /* Set the current buffer to BUFFER provided it is alive. */
1890 set_buffer_if_live (buffer
)
1893 if (! NILP (XBUFFER (buffer
)->name
))
1894 Fset_buffer (buffer
);
1898 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1899 Sbarf_if_buffer_read_only
, 0, 0, 0,
1900 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1903 if (!NILP (current_buffer
->read_only
)
1904 && NILP (Vinhibit_read_only
))
1905 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1909 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1910 doc
: /* Put BUFFER at the end of the list of all buffers.
1911 There it is the least likely candidate for `other-buffer' to return;
1912 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1913 If BUFFER is nil or omitted, bury the current buffer.
1914 Also, if BUFFER is nil or omitted, remove the current buffer from the
1915 selected window if it is displayed there. */)
1917 register Lisp_Object buffer
;
1919 /* Figure out what buffer we're going to bury. */
1923 XSETBUFFER (buffer
, current_buffer
);
1925 tem
= Fwindow_buffer (selected_window
);
1926 /* If we're burying the current buffer, unshow it. */
1927 if (EQ (buffer
, tem
))
1929 if (NILP (Fwindow_dedicated_p (selected_window
)))
1930 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1931 else if (NILP (XWINDOW (selected_window
)->parent
))
1932 Ficonify_frame (Fwindow_frame (selected_window
));
1934 Fdelete_window (selected_window
);
1941 buf1
= Fget_buffer (buffer
);
1947 /* Move buffer to the end of the buffer list. Do nothing if the
1948 buffer is killed. */
1949 if (!NILP (XBUFFER (buffer
)->name
))
1951 Lisp_Object aelt
, link
;
1953 aelt
= Frassq (buffer
, Vbuffer_alist
);
1954 link
= Fmemq (aelt
, Vbuffer_alist
);
1955 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1956 XSETCDR (link
, Qnil
);
1957 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1959 /* Removing BUFFER from frame-specific lists
1960 has the effect of putting BUFFER at the end
1961 of the combined list in each frame. */
1962 frames_discard_buffer (buffer
);
1968 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1969 doc
: /* Delete the entire contents of the current buffer.
1970 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1971 so the buffer is truly empty after this. */)
1978 current_buffer
->last_window_start
= 1;
1979 /* Prevent warnings, or suspension of auto saving, that would happen
1980 if future size is less than past size. Use of erase-buffer
1981 implies that the future text is not really related to the past text. */
1982 XSETFASTINT (current_buffer
->save_length
, 0);
1987 validate_region (b
, e
)
1988 register Lisp_Object
*b
, *e
;
1990 CHECK_NUMBER_COERCE_MARKER (*b
);
1991 CHECK_NUMBER_COERCE_MARKER (*e
);
1993 if (XINT (*b
) > XINT (*e
))
1996 tem
= *b
; *b
= *e
; *e
= tem
;
1999 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2000 && XINT (*e
) <= ZV
))
2001 args_out_of_range (*b
, *e
);
2004 /* Advance BYTE_POS up to a character boundary
2005 and return the adjusted position. */
2008 advance_to_char_boundary (byte_pos
)
2013 if (byte_pos
== BEG
)
2014 /* Beginning of buffer is always a character boundary. */
2017 c
= FETCH_BYTE (byte_pos
);
2018 if (! CHAR_HEAD_P (c
))
2020 /* We should advance BYTE_POS only when C is a constituent of a
2021 multibyte sequence. */
2022 int orig_byte_pos
= byte_pos
;
2027 c
= FETCH_BYTE (byte_pos
);
2029 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2031 if (byte_pos
< orig_byte_pos
)
2032 byte_pos
= orig_byte_pos
;
2033 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2034 surely advance to the correct character boundary. If C is
2035 not, BYTE_POS was unchanged. */
2041 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2043 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2044 If FLAG is t, this makes the buffer a multibyte buffer.
2045 If FLAG is nil, this makes the buffer a single-byte buffer.
2046 The buffer contents remain unchanged as a sequence of bytes
2047 but the contents viewed as characters do change. */)
2051 Lisp_Object tail
, markers
;
2052 struct buffer
*other
;
2053 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2054 int begv
= BEGV
, zv
= ZV
;
2055 int narrowed
= (BEG
!= begv
|| Z
!= zv
);
2056 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2058 if (current_buffer
->base_buffer
)
2059 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2061 /* Do nothing if nothing actually changes. */
2062 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2065 /* It would be better to update the list,
2066 but this is good enough for now. */
2068 current_buffer
->undo_list
= Qt
;
2070 /* If the cached position is for this buffer, clear it out. */
2071 clear_charpos_cache (current_buffer
);
2081 /* Do this first, so it can use CHAR_TO_BYTE
2082 to calculate the old correspondences. */
2083 set_intervals_multibyte (0);
2085 current_buffer
->enable_multibyte_characters
= Qnil
;
2091 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2093 tail
= BUF_MARKERS (current_buffer
);
2094 while (! NILP (tail
))
2096 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
2097 tail
= XMARKER (tail
)->chain
;
2100 /* Convert multibyte form of 8-bit characters to unibyte. */
2115 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2116 p
+= bytes
, pos
+= bytes
;
2119 c
= STRING_CHAR (p
, stop
- pos
);
2120 /* Delete all bytes for this 8-bit character but the
2121 last one, and change the last one to the charcter
2124 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2136 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2144 /* Be sure not to have a multibyte sequence striding over the GAP.
2145 Ex: We change this: "...abc\201 _GAP_ \241def..."
2146 to: "...abc _GAP_ \201\241def..." */
2148 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2149 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2151 unsigned char *p
= GPT_ADDR
- 1;
2153 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2154 if (BASE_LEADING_CODE_P (*p
))
2156 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2158 move_gap_both (new_gpt
, new_gpt
);
2162 /* Make the buffer contents valid as multibyte by converting
2163 8-bit characters to multibyte form. */
2179 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2180 p
+= bytes
, pos
+= bytes
;
2183 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2185 bytes
= CHAR_STRING (*p
, tmp
);
2187 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2189 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2190 /* Now the gap is after the just inserted data. */
2207 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2209 /* Do this first, so that chars_in_text asks the right question.
2210 set_intervals_multibyte needs it too. */
2211 current_buffer
->enable_multibyte_characters
= Qt
;
2213 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2214 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2216 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2218 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2219 if (BEGV_BYTE
> GPT_BYTE
)
2220 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2222 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2224 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2225 if (ZV_BYTE
> GPT_BYTE
)
2226 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2228 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2231 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2234 if (pt_byte
> GPT_BYTE
)
2235 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2237 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2238 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2241 tail
= markers
= BUF_MARKERS (current_buffer
);
2243 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2244 getting confused by the markers that have not yet been updated.
2245 It is also a signal that it should never create a marker. */
2246 BUF_MARKERS (current_buffer
) = Qnil
;
2248 while (! NILP (tail
))
2250 XMARKER (tail
)->bytepos
2251 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
2252 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
2254 tail
= XMARKER (tail
)->chain
;
2257 /* Make sure no markers were put on the chain
2258 while the chain value was incorrect. */
2259 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
2262 BUF_MARKERS (current_buffer
) = markers
;
2264 /* Do this last, so it can calculate the new correspondences
2265 between chars and bytes. */
2266 set_intervals_multibyte (1);
2270 current_buffer
->undo_list
= Qnil
;
2272 /* Changing the multibyteness of a buffer means that all windows
2273 showing that buffer must be updated thoroughly. */
2274 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2275 ++windows_or_buffers_changed
;
2277 /* Copy this buffer's new multibyte status
2278 into all of its indirect buffers. */
2279 for (other
= all_buffers
; other
; other
= other
->next
)
2280 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2282 other
->enable_multibyte_characters
2283 = current_buffer
->enable_multibyte_characters
;
2284 other
->prevent_redisplay_optimizations_p
= 1;
2287 /* Restore the modifiedness of the buffer. */
2288 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2289 Fset_buffer_modified_p (Qnil
);
2291 /* Update coding systems of this buffer's process (if any). */
2293 Lisp_Object process
;
2295 process
= Fget_buffer_process (Fcurrent_buffer ());
2296 if (PROCESSP (process
))
2297 setup_process_coding_systems (process
);
2303 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2305 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2306 Most local variable bindings are eliminated so that the default values
2307 become effective once more. Also, the syntax table is set from
2308 `standard-syntax-table', the local keymap is set to nil,
2309 and the abbrev table from `fundamental-mode-abbrev-table'.
2310 This function also forces redisplay of the mode line.
2312 Every function to select a new major mode starts by
2313 calling this function.
2315 As a special exception, local variables whose names have
2316 a non-nil `permanent-local' property are not eliminated by this function.
2318 The first thing this function does is run
2319 the normal hook `change-major-mode-hook'. */)
2322 register Lisp_Object alist
, sym
, tem
;
2325 if (!NILP (Vrun_hooks
))
2326 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2327 oalist
= current_buffer
->local_var_alist
;
2329 /* Make sure none of the bindings in oalist
2330 remain swapped in, in their symbols. */
2332 swap_out_buffer_local_variables (current_buffer
);
2334 /* Actually eliminate all local bindings of this buffer. */
2336 reset_buffer_local_variables (current_buffer
, 0);
2338 /* Any which are supposed to be permanent,
2339 make local again, with the same values they had. */
2341 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2343 sym
= XCAR (XCAR (alist
));
2344 tem
= Fget (sym
, Qpermanent_local
);
2347 Fmake_local_variable (sym
);
2348 Fset (sym
, XCDR (XCAR (alist
)));
2352 /* Force mode-line redisplay. Useful here because all major mode
2353 commands call this function. */
2354 update_mode_lines
++;
2359 /* Make sure no local variables remain set up with buffer B
2360 for their current values. */
2363 swap_out_buffer_local_variables (b
)
2366 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2368 XSETBUFFER (buffer
, b
);
2369 oalist
= b
->local_var_alist
;
2371 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2373 sym
= XCAR (XCAR (alist
));
2375 /* Need not do anything if some other buffer's binding is now encached. */
2376 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2377 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2379 /* Symbol is set up for this buffer's old local value.
2380 Set it up for the current buffer with the default value. */
2382 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2383 /* Store the symbol's current value into the alist entry
2384 it is currently set up for. This is so that, if the
2385 local is marked permanent, and we make it local again
2386 later in Fkill_all_local_variables, we don't lose the value. */
2387 XSETCDR (XCAR (tem
),
2388 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2389 /* Switch to the symbol's default-value alist entry. */
2391 /* Mark it as current for buffer B. */
2392 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2393 /* Store the current value into any forwarding in the symbol. */
2394 store_symval_forwarding (sym
,
2395 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2401 /* Find all the overlays in the current buffer that contain position POS.
2402 Return the number found, and store them in a vector in *VEC_PTR.
2403 Store in *LEN_PTR the size allocated for the vector.
2404 Store in *NEXT_PTR the next position after POS where an overlay starts,
2405 or ZV if there are no more overlays.
2406 Store in *PREV_PTR the previous position before POS where an overlay ends,
2407 or where an overlay starts which ends at or after POS;
2408 or BEGV if there are no such overlays.
2409 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2411 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2412 when this function is called.
2414 If EXTEND is non-zero, we make the vector bigger if necessary.
2415 If EXTEND is zero, we never extend the vector,
2416 and we store only as many overlays as will fit.
2417 But we still return the total number of overlays.
2419 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2420 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2421 default (BEGV or ZV). */
2424 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2427 Lisp_Object
**vec_ptr
;
2433 Lisp_Object tail
, overlay
, start
, end
;
2436 Lisp_Object
*vec
= *vec_ptr
;
2439 int inhibit_storing
= 0;
2441 for (tail
= current_buffer
->overlays_before
;
2445 int startpos
, endpos
;
2447 overlay
= XCAR (tail
);
2449 start
= OVERLAY_START (overlay
);
2450 end
= OVERLAY_END (overlay
);
2451 endpos
= OVERLAY_POSITION (end
);
2458 startpos
= OVERLAY_POSITION (start
);
2459 /* This one ends at or after POS
2460 so its start counts for PREV_PTR if it's before POS. */
2461 if (prev
< startpos
&& startpos
< pos
)
2465 if (startpos
<= pos
)
2469 /* The supplied vector is full.
2470 Either make it bigger, or don't store any more in it. */
2473 /* Make it work with an initial len == 0. */
2478 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2482 inhibit_storing
= 1;
2485 if (!inhibit_storing
)
2487 /* Keep counting overlays even if we can't return them all. */
2490 else if (startpos
< next
)
2494 for (tail
= current_buffer
->overlays_after
;
2498 int startpos
, endpos
;
2500 overlay
= XCAR (tail
);
2502 start
= OVERLAY_START (overlay
);
2503 end
= OVERLAY_END (overlay
);
2504 startpos
= OVERLAY_POSITION (start
);
2507 if (startpos
< next
)
2511 endpos
= OVERLAY_POSITION (end
);
2518 /* Make it work with an initial len == 0. */
2523 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2527 inhibit_storing
= 1;
2530 if (!inhibit_storing
)
2534 if (startpos
< pos
&& startpos
> prev
)
2537 else if (endpos
< pos
&& endpos
> prev
)
2539 else if (endpos
== pos
&& startpos
> prev
2540 && (!change_req
|| startpos
< pos
))
2551 /* Find all the overlays in the current buffer that overlap the range BEG-END
2552 or are empty at BEG.
2554 Return the number found, and store them in a vector in *VEC_PTR.
2555 Store in *LEN_PTR the size allocated for the vector.
2556 Store in *NEXT_PTR the next position after POS where an overlay starts,
2557 or ZV if there are no more overlays.
2558 Store in *PREV_PTR the previous position before POS where an overlay ends,
2559 or BEGV if there are no previous overlays.
2560 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2562 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2563 when this function is called.
2565 If EXTEND is non-zero, we make the vector bigger if necessary.
2566 If EXTEND is zero, we never extend the vector,
2567 and we store only as many overlays as will fit.
2568 But we still return the total number of overlays. */
2571 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2574 Lisp_Object
**vec_ptr
;
2579 Lisp_Object tail
, overlay
, ostart
, oend
;
2582 Lisp_Object
*vec
= *vec_ptr
;
2585 int inhibit_storing
= 0;
2587 for (tail
= current_buffer
->overlays_before
;
2591 int startpos
, endpos
;
2593 overlay
= XCAR (tail
);
2595 ostart
= OVERLAY_START (overlay
);
2596 oend
= OVERLAY_END (overlay
);
2597 endpos
= OVERLAY_POSITION (oend
);
2604 startpos
= OVERLAY_POSITION (ostart
);
2605 /* Count an interval if it either overlaps the range
2606 or is empty at the start of the range. */
2607 if ((beg
< endpos
&& startpos
< end
)
2608 || (startpos
== endpos
&& beg
== endpos
))
2612 /* The supplied vector is full.
2613 Either make it bigger, or don't store any more in it. */
2616 /* Make it work with an initial len == 0. */
2621 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2625 inhibit_storing
= 1;
2628 if (!inhibit_storing
)
2630 /* Keep counting overlays even if we can't return them all. */
2633 else if (startpos
< next
)
2637 for (tail
= current_buffer
->overlays_after
;
2641 int startpos
, endpos
;
2643 overlay
= XCAR (tail
);
2645 ostart
= OVERLAY_START (overlay
);
2646 oend
= OVERLAY_END (overlay
);
2647 startpos
= OVERLAY_POSITION (ostart
);
2650 if (startpos
< next
)
2654 endpos
= OVERLAY_POSITION (oend
);
2655 /* Count an interval if it either overlaps the range
2656 or is empty at the start of the range. */
2657 if ((beg
< endpos
&& startpos
< end
)
2658 || (startpos
== endpos
&& beg
== endpos
))
2664 /* Make it work with an initial len == 0. */
2669 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2673 inhibit_storing
= 1;
2676 if (!inhibit_storing
)
2680 else if (endpos
< beg
&& endpos
> prev
)
2692 /* Return non-zero if there exists an overlay with a non-nil
2693 `mouse-face' property overlapping OVERLAY. */
2696 mouse_face_overlay_overlaps (overlay
)
2697 Lisp_Object overlay
;
2699 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2700 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2702 Lisp_Object
*v
, tem
;
2705 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2706 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2709 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2710 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2713 for (i
= 0; i
< n
; ++i
)
2714 if (!EQ (v
[i
], overlay
)
2715 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2724 /* Fast function to just test if we're at an overlay boundary. */
2726 overlay_touches_p (pos
)
2729 Lisp_Object tail
, overlay
;
2731 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2736 overlay
= XCAR (tail
);
2737 if (!GC_OVERLAYP (overlay
))
2740 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2743 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2747 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2752 overlay
= XCAR (tail
);
2753 if (!GC_OVERLAYP (overlay
))
2756 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2759 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2767 Lisp_Object overlay
;
2773 compare_overlays (v1
, v2
)
2774 const void *v1
, *v2
;
2776 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2777 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2778 if (s1
->priority
!= s2
->priority
)
2779 return s1
->priority
- s2
->priority
;
2780 if (s1
->beg
!= s2
->beg
)
2781 return s1
->beg
- s2
->beg
;
2782 if (s1
->end
!= s2
->end
)
2783 return s2
->end
- s1
->end
;
2787 /* Sort an array of overlays by priority. The array is modified in place.
2788 The return value is the new size; this may be smaller than the original
2789 size if some of the overlays were invalid or were window-specific. */
2791 sort_overlays (overlay_vec
, noverlays
, w
)
2792 Lisp_Object
*overlay_vec
;
2797 struct sortvec
*sortvec
;
2798 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2800 /* Put the valid and relevant overlays into sortvec. */
2802 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2805 Lisp_Object overlay
;
2807 overlay
= overlay_vec
[i
];
2808 if (OVERLAY_VALID (overlay
)
2809 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2810 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2812 /* If we're interested in a specific window, then ignore
2813 overlays that are limited to some other window. */
2818 window
= Foverlay_get (overlay
, Qwindow
);
2819 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2823 /* This overlay is good and counts: put it into sortvec. */
2824 sortvec
[j
].overlay
= overlay
;
2825 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2826 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2827 tem
= Foverlay_get (overlay
, Qpriority
);
2829 sortvec
[j
].priority
= XINT (tem
);
2831 sortvec
[j
].priority
= 0;
2837 /* Sort the overlays into the proper order: increasing priority. */
2840 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2842 for (i
= 0; i
< noverlays
; i
++)
2843 overlay_vec
[i
] = sortvec
[i
].overlay
;
2849 Lisp_Object string
, string2
;
2856 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2857 int size
; /* Allocated length of that array. */
2858 int used
; /* How much of the array is currently in use. */
2859 int bytes
; /* Total length of the strings in buf. */
2862 /* Buffers for storing information about the overlays touching a given
2863 position. These could be automatic variables in overlay_strings, but
2864 it's more efficient to hold onto the memory instead of repeatedly
2865 allocating and freeing it. */
2866 static struct sortstrlist overlay_heads
, overlay_tails
;
2867 static unsigned char *overlay_str_buf
;
2869 /* Allocated length of overlay_str_buf. */
2870 static int overlay_str_len
;
2872 /* A comparison function suitable for passing to qsort. */
2874 cmp_for_strings (as1
, as2
)
2877 struct sortstr
*s1
= (struct sortstr
*)as1
;
2878 struct sortstr
*s2
= (struct sortstr
*)as2
;
2879 if (s1
->size
!= s2
->size
)
2880 return s2
->size
- s1
->size
;
2881 if (s1
->priority
!= s2
->priority
)
2882 return s1
->priority
- s2
->priority
;
2887 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2888 struct sortstrlist
*ssl
;
2889 Lisp_Object str
, str2
, pri
;
2894 if (ssl
->used
== ssl
->size
)
2900 ssl
->buf
= ((struct sortstr
*)
2901 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2903 ssl
->buf
[ssl
->used
].string
= str
;
2904 ssl
->buf
[ssl
->used
].string2
= str2
;
2905 ssl
->buf
[ssl
->used
].size
= size
;
2906 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2909 if (NILP (current_buffer
->enable_multibyte_characters
))
2910 nbytes
= SCHARS (str
);
2911 else if (! STRING_MULTIBYTE (str
))
2912 nbytes
= count_size_as_multibyte (SDATA (str
),
2915 nbytes
= SBYTES (str
);
2917 ssl
->bytes
+= nbytes
;
2921 if (NILP (current_buffer
->enable_multibyte_characters
))
2922 nbytes
= SCHARS (str2
);
2923 else if (! STRING_MULTIBYTE (str2
))
2924 nbytes
= count_size_as_multibyte (SDATA (str2
),
2927 nbytes
= SBYTES (str2
);
2929 ssl
->bytes
+= nbytes
;
2933 /* Return the concatenation of the strings associated with overlays that
2934 begin or end at POS, ignoring overlays that are specific to a window
2935 other than W. The strings are concatenated in the appropriate order:
2936 shorter overlays nest inside longer ones, and higher priority inside
2937 lower. Normally all of the after-strings come first, but zero-sized
2938 overlays have their after-strings ride along with the before-strings
2939 because it would look strange to print them inside-out.
2941 Returns the string length, and stores the contents indirectly through
2942 PSTR, if that variable is non-null. The string may be overwritten by
2943 subsequent calls. */
2946 overlay_strings (pos
, w
, pstr
)
2949 unsigned char **pstr
;
2951 Lisp_Object ov
, overlay
, window
, str
;
2952 int startpos
, endpos
;
2953 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2955 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2956 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2957 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCDR (ov
))
2959 overlay
= XCAR (ov
);
2960 if (!OVERLAYP (overlay
))
2963 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2964 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2967 if (endpos
!= pos
&& startpos
!= pos
)
2969 window
= Foverlay_get (overlay
, Qwindow
);
2970 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2973 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2974 record_overlay_string (&overlay_heads
, str
,
2976 ? Foverlay_get (overlay
, Qafter_string
)
2978 Foverlay_get (overlay
, Qpriority
),
2980 else if (endpos
== pos
2981 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2982 record_overlay_string (&overlay_tails
, str
, Qnil
,
2983 Foverlay_get (overlay
, Qpriority
),
2986 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCDR (ov
))
2988 overlay
= XCAR (ov
);
2989 if (!OVERLAYP (overlay
))
2992 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2993 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2996 if (endpos
!= pos
&& startpos
!= pos
)
2998 window
= Foverlay_get (overlay
, Qwindow
);
2999 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3002 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3003 record_overlay_string (&overlay_heads
, str
,
3005 ? Foverlay_get (overlay
, Qafter_string
)
3007 Foverlay_get (overlay
, Qpriority
),
3009 else if (endpos
== pos
3010 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3011 record_overlay_string (&overlay_tails
, str
, Qnil
,
3012 Foverlay_get (overlay
, Qpriority
),
3015 if (overlay_tails
.used
> 1)
3016 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3018 if (overlay_heads
.used
> 1)
3019 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3021 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3026 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3028 if (total
> overlay_str_len
)
3030 overlay_str_len
= total
;
3031 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3034 p
= overlay_str_buf
;
3035 for (i
= overlay_tails
.used
; --i
>= 0;)
3038 tem
= overlay_tails
.buf
[i
].string
;
3039 nbytes
= copy_text (SDATA (tem
), p
,
3041 STRING_MULTIBYTE (tem
), multibyte
);
3044 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3047 tem
= overlay_heads
.buf
[i
].string
;
3048 nbytes
= copy_text (SDATA (tem
), p
,
3050 STRING_MULTIBYTE (tem
), multibyte
);
3052 tem
= overlay_heads
.buf
[i
].string2
;
3055 nbytes
= copy_text (SDATA (tem
), p
,
3057 STRING_MULTIBYTE (tem
), multibyte
);
3061 if (p
!= overlay_str_buf
+ total
)
3064 *pstr
= overlay_str_buf
;
3070 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3073 recenter_overlay_lists (buf
, pos
)
3077 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
3079 /* See if anything in overlays_before should move to overlays_after. */
3081 /* We don't strictly need prev in this loop; it should always be nil.
3082 But we use it for symmetry and in case that should cease to be true
3083 with some future change. */
3085 for (tail
= buf
->overlays_before
;
3087 prev
= tail
, tail
= next
)
3090 overlay
= XCAR (tail
);
3092 /* If the overlay is not valid, get rid of it. */
3093 if (!OVERLAY_VALID (overlay
))
3098 /* Splice the cons cell TAIL out of overlays_before. */
3102 buf
->overlays_before
= next
;
3108 beg
= OVERLAY_START (overlay
);
3109 end
= OVERLAY_END (overlay
);
3111 if (OVERLAY_POSITION (end
) > pos
)
3113 /* OVERLAY needs to be moved. */
3114 int where
= OVERLAY_POSITION (beg
);
3115 Lisp_Object other
, other_prev
;
3117 /* Splice the cons cell TAIL out of overlays_before. */
3119 XSETCDR (prev
, next
);
3121 buf
->overlays_before
= next
;
3123 /* Search thru overlays_after for where to put it. */
3125 for (other
= buf
->overlays_after
;
3127 other_prev
= other
, other
= XCDR (other
))
3129 Lisp_Object otherbeg
, otheroverlay
;
3131 otheroverlay
= XCAR (other
);
3132 if (! OVERLAY_VALID (otheroverlay
))
3135 otherbeg
= OVERLAY_START (otheroverlay
);
3136 if (OVERLAY_POSITION (otherbeg
) >= where
)
3140 /* Add TAIL to overlays_after before OTHER. */
3141 XSETCDR (tail
, other
);
3142 if (!NILP (other_prev
))
3143 XSETCDR (other_prev
, tail
);
3145 buf
->overlays_after
= tail
;
3149 /* We've reached the things that should stay in overlays_before.
3150 All the rest of overlays_before must end even earlier,
3155 /* See if anything in overlays_after should be in overlays_before. */
3157 for (tail
= buf
->overlays_after
;
3159 prev
= tail
, tail
= next
)
3162 overlay
= XCAR (tail
);
3164 /* If the overlay is not valid, get rid of it. */
3165 if (!OVERLAY_VALID (overlay
))
3170 /* Splice the cons cell TAIL out of overlays_after. */
3174 buf
->overlays_after
= next
;
3180 beg
= OVERLAY_START (overlay
);
3181 end
= OVERLAY_END (overlay
);
3183 /* Stop looking, when we know that nothing further
3184 can possibly end before POS. */
3185 if (OVERLAY_POSITION (beg
) > pos
)
3188 if (OVERLAY_POSITION (end
) <= pos
)
3190 /* OVERLAY needs to be moved. */
3191 int where
= OVERLAY_POSITION (end
);
3192 Lisp_Object other
, other_prev
;
3194 /* Splice the cons cell TAIL out of overlays_after. */
3196 XSETCDR (prev
, next
);
3198 buf
->overlays_after
= next
;
3200 /* Search thru overlays_before for where to put it. */
3202 for (other
= buf
->overlays_before
;
3204 other_prev
= other
, other
= XCDR (other
))
3206 Lisp_Object otherend
, otheroverlay
;
3208 otheroverlay
= XCAR (other
);
3209 if (! OVERLAY_VALID (otheroverlay
))
3212 otherend
= OVERLAY_END (otheroverlay
);
3213 if (OVERLAY_POSITION (otherend
) <= where
)
3217 /* Add TAIL to overlays_before before OTHER. */
3218 XSETCDR (tail
, other
);
3219 if (!NILP (other_prev
))
3220 XSETCDR (other_prev
, tail
);
3222 buf
->overlays_before
= tail
;
3227 XSETFASTINT (buf
->overlay_center
, pos
);
3231 adjust_overlays_for_insert (pos
, length
)
3235 /* After an insertion, the lists are still sorted properly,
3236 but we may need to update the value of the overlay center. */
3237 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
3238 XSETFASTINT (current_buffer
->overlay_center
,
3239 XFASTINT (current_buffer
->overlay_center
) + length
);
3243 adjust_overlays_for_delete (pos
, length
)
3247 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
3248 /* The deletion was to our right. No change needed; the before- and
3249 after-lists are still consistent. */
3251 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
3252 /* The deletion was to our left. We need to adjust the center value
3253 to account for the change in position, but the lists are consistent
3254 given the new value. */
3255 XSETFASTINT (current_buffer
->overlay_center
,
3256 XFASTINT (current_buffer
->overlay_center
) - length
);
3258 /* We're right in the middle. There might be things on the after-list
3259 that now belong on the before-list. Recentering will move them,
3260 and also update the center point. */
3261 recenter_overlay_lists (current_buffer
, pos
);
3264 /* Fix up overlays that were garbled as a result of permuting markers
3265 in the range START through END. Any overlay with at least one
3266 endpoint in this range will need to be unlinked from the overlay
3267 list and reinserted in its proper place.
3268 Such an overlay might even have negative size at this point.
3269 If so, we'll reverse the endpoints. Can you think of anything
3270 better to do in this situation? */
3272 fix_overlays_in_range (start
, end
)
3273 register int start
, end
;
3275 Lisp_Object overlay
;
3276 Lisp_Object before_list
, after_list
;
3277 /* These are either nil, indicating that before_list or after_list
3278 should be assigned, or the cons cell the cdr of which should be
3280 Lisp_Object beforep
= Qnil
, afterp
= Qnil
;
3281 /* 'Parent', likewise, indicates a cons cell or
3282 current_buffer->overlays_before or overlays_after, depending
3283 which loop we're in. */
3284 Lisp_Object tail
, parent
;
3285 int startpos
, endpos
;
3287 /* This algorithm shifts links around instead of consing and GCing.
3288 The loop invariant is that before_list (resp. after_list) is a
3289 well-formed list except that its last element, the CDR of beforep
3290 (resp. afterp) if beforep (afterp) isn't nil or before_list
3291 (after_list) if it is, is still uninitialized. So it's not a bug
3292 that before_list isn't initialized, although it may look
3294 for (parent
= Qnil
, tail
= current_buffer
->overlays_before
; CONSP (tail
);)
3296 overlay
= XCAR (tail
);
3297 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3300 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3302 || (startpos
>= start
&& startpos
< end
))
3304 /* If the overlay is backwards, fix that now. */
3305 if (startpos
> endpos
)
3308 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3310 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3312 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3314 /* Add it to the end of the wrong list. Later on,
3315 recenter_overlay_lists will move it to the right place. */
3316 if (endpos
< XINT (current_buffer
->overlay_center
))
3321 XSETCDR (afterp
, tail
);
3329 XSETCDR (beforep
, tail
);
3333 current_buffer
->overlays_before
= XCDR (tail
);
3335 XSETCDR (parent
, XCDR (tail
));
3339 parent
= tail
, tail
= XCDR (parent
);
3341 for (parent
= Qnil
, tail
= current_buffer
->overlays_after
; CONSP (tail
);)
3343 overlay
= XCAR (tail
);
3344 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3345 if (startpos
>= end
)
3347 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3348 if (startpos
>= start
3349 || (endpos
>= start
&& endpos
< end
))
3351 if (startpos
> endpos
)
3354 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3356 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3358 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3360 if (endpos
< XINT (current_buffer
->overlay_center
))
3365 XSETCDR (afterp
, tail
);
3373 XSETCDR (beforep
, tail
);
3377 current_buffer
->overlays_after
= XCDR (tail
);
3379 XSETCDR (parent
, XCDR (tail
));
3383 parent
= tail
, tail
= XCDR (parent
);
3386 /* Splice the constructed (wrong) lists into the buffer's lists,
3387 and let the recenter function make it sane again. */
3388 if (!NILP (beforep
))
3390 XSETCDR (beforep
, current_buffer
->overlays_before
);
3391 current_buffer
->overlays_before
= before_list
;
3393 recenter_overlay_lists (current_buffer
,
3394 XINT (current_buffer
->overlay_center
));
3398 XSETCDR (afterp
, current_buffer
->overlays_after
);
3399 current_buffer
->overlays_after
= after_list
;
3401 recenter_overlay_lists (current_buffer
,
3402 XINT (current_buffer
->overlay_center
));
3405 /* We have two types of overlay: the one whose ending marker is
3406 after-insertion-marker (this is the usual case) and the one whose
3407 ending marker is before-insertion-marker. When `overlays_before'
3408 contains overlays of the latter type and the former type in this
3409 order and both overlays end at inserting position, inserting a text
3410 increases only the ending marker of the latter type, which results
3411 in incorrect ordering of `overlays_before'.
3413 This function fixes ordering of overlays in the slot
3414 `overlays_before' of the buffer *BP. Before the insertion, `point'
3415 was at PREV, and now is at POS. */
3418 fix_overlays_before (bp
, prev
, pos
)
3422 /* If parent is nil, replace overlays_before; otherwise, XCDR(parent). */
3423 Lisp_Object tail
= bp
->overlays_before
, parent
= Qnil
;
3424 Lisp_Object right_pair
;
3427 /* After the insertion, the several overlays may be in incorrect
3428 order. The possibility is that, in the list `overlays_before',
3429 an overlay which ends at POS appears after an overlay which ends
3430 at PREV. Since POS is greater than PREV, we must fix the
3431 ordering of these overlays, by moving overlays ends at POS before
3432 the overlays ends at PREV. */
3434 /* At first, find a place where disordered overlays should be linked
3435 in. It is where an overlay which end before POS exists. (i.e. an
3436 overlay whose ending marker is after-insertion-marker if disorder
3439 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCAR (tail
))))
3446 /* If we don't find such an overlay,
3447 or the found one ends before PREV,
3448 or the found one is the last one in the list,
3449 we don't have to fix anything. */
3452 || NILP (XCDR (tail
)))
3455 right_pair
= parent
;
3459 /* Now, end position of overlays in the list TAIL should be before
3460 or equal to PREV. In the loop, an overlay which ends at POS is
3461 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3462 we found an overlay which ends before PREV, the remaining
3463 overlays are in correct order. */
3464 while (!NILP (tail
))
3466 end
= OVERLAY_POSITION (OVERLAY_END (XCAR (tail
)));
3469 { /* This overlay is disordered. */
3470 Lisp_Object found
= tail
;
3472 /* Unlink the found overlay. */
3473 tail
= XCDR (found
);
3474 XSETCDR (parent
, tail
);
3475 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3476 and link it into the right place. */
3477 if (NILP (right_pair
))
3479 XSETCDR (found
, bp
->overlays_before
);
3480 bp
->overlays_before
= found
;
3484 XSETCDR (found
, XCDR (right_pair
));
3485 XSETCDR (right_pair
, found
);
3488 else if (end
== prev
)
3493 else /* No more disordered overlay. */
3498 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3499 doc
: /* Return t if OBJECT is an overlay. */)
3503 return (OVERLAYP (object
) ? Qt
: Qnil
);
3506 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3507 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3508 If omitted, BUFFER defaults to the current buffer.
3509 BEG and END may be integers or markers.
3510 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3511 front delimiter advance when text is inserted there.
3512 The fifth arg REAR-ADVANCE, if non-nil, makes the
3513 rear delimiter advance when text is inserted there. */)
3514 (beg
, end
, buffer
, front_advance
, rear_advance
)
3515 Lisp_Object beg
, end
, buffer
;
3516 Lisp_Object front_advance
, rear_advance
;
3518 Lisp_Object overlay
;
3522 XSETBUFFER (buffer
, current_buffer
);
3524 CHECK_BUFFER (buffer
);
3526 && ! EQ (Fmarker_buffer (beg
), buffer
))
3527 error ("Marker points into wrong buffer");
3529 && ! EQ (Fmarker_buffer (end
), buffer
))
3530 error ("Marker points into wrong buffer");
3532 CHECK_NUMBER_COERCE_MARKER (beg
);
3533 CHECK_NUMBER_COERCE_MARKER (end
);
3535 if (XINT (beg
) > XINT (end
))
3538 temp
= beg
; beg
= end
; end
= temp
;
3541 b
= XBUFFER (buffer
);
3543 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3544 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3546 if (!NILP (front_advance
))
3547 XMARKER (beg
)->insertion_type
= 1;
3548 if (!NILP (rear_advance
))
3549 XMARKER (end
)->insertion_type
= 1;
3551 overlay
= allocate_misc ();
3552 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3553 XOVERLAY (overlay
)->start
= beg
;
3554 XOVERLAY (overlay
)->end
= end
;
3555 XOVERLAY (overlay
)->plist
= Qnil
;
3557 /* Put the new overlay on the wrong list. */
3558 end
= OVERLAY_END (overlay
);
3559 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3560 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3562 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3564 /* This puts it in the right list, and in the right order. */
3565 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3567 /* We don't need to redisplay the region covered by the overlay, because
3568 the overlay has no properties at the moment. */
3573 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3576 modify_overlay (buf
, start
, end
)
3587 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3589 /* If this is a buffer not in the selected window,
3590 we must do other windows. */
3591 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3592 windows_or_buffers_changed
= 1;
3593 /* If multiple windows show this buffer, we must do other windows. */
3594 else if (buffer_shared
> 1)
3595 windows_or_buffers_changed
= 1;
3597 ++BUF_OVERLAY_MODIFF (buf
);
3601 Lisp_Object
Fdelete_overlay ();
3603 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3604 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3605 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3606 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3608 (overlay
, beg
, end
, buffer
)
3609 Lisp_Object overlay
, beg
, end
, buffer
;
3611 struct buffer
*b
, *ob
;
3612 Lisp_Object obuffer
;
3613 int count
= SPECPDL_INDEX ();
3615 CHECK_OVERLAY (overlay
);
3617 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3619 XSETBUFFER (buffer
, current_buffer
);
3620 CHECK_BUFFER (buffer
);
3623 && ! EQ (Fmarker_buffer (beg
), buffer
))
3624 error ("Marker points into wrong buffer");
3626 && ! EQ (Fmarker_buffer (end
), buffer
))
3627 error ("Marker points into wrong buffer");
3629 CHECK_NUMBER_COERCE_MARKER (beg
);
3630 CHECK_NUMBER_COERCE_MARKER (end
);
3632 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3633 return Fdelete_overlay (overlay
);
3635 if (XINT (beg
) > XINT (end
))
3638 temp
= beg
; beg
= end
; end
= temp
;
3641 specbind (Qinhibit_quit
, Qt
);
3643 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3644 b
= XBUFFER (buffer
);
3645 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3647 /* If the overlay has changed buffers, do a thorough redisplay. */
3648 if (!EQ (buffer
, obuffer
))
3650 /* Redisplay where the overlay was. */
3651 if (!NILP (obuffer
))
3656 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3657 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3659 modify_overlay (ob
, o_beg
, o_end
);
3662 /* Redisplay where the overlay is going to be. */
3663 modify_overlay (b
, XINT (beg
), XINT (end
));
3666 /* Redisplay the area the overlay has just left, or just enclosed. */
3670 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3671 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3673 if (o_beg
== XINT (beg
))
3674 modify_overlay (b
, o_end
, XINT (end
));
3675 else if (o_end
== XINT (end
))
3676 modify_overlay (b
, o_beg
, XINT (beg
));
3679 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3680 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3681 modify_overlay (b
, o_beg
, o_end
);
3685 if (!NILP (obuffer
))
3687 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3688 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3691 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3692 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3694 /* Put the overlay on the wrong list. */
3695 end
= OVERLAY_END (overlay
);
3696 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3697 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3699 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3701 /* This puts it in the right list, and in the right order. */
3702 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3704 return unbind_to (count
, overlay
);
3707 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3708 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3710 Lisp_Object overlay
;
3714 int count
= SPECPDL_INDEX ();
3716 CHECK_OVERLAY (overlay
);
3718 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3722 b
= XBUFFER (buffer
);
3723 specbind (Qinhibit_quit
, Qt
);
3725 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3726 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3728 marker_position (OVERLAY_START (overlay
)),
3729 marker_position (OVERLAY_END (overlay
)));
3730 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3731 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3733 /* When deleting an overlay with before or after strings, turn off
3734 display optimizations for the affected buffer, on the basis that
3735 these strings may contain newlines. This is easier to do than to
3736 check for that situation during redisplay. */
3737 if (!windows_or_buffers_changed
3738 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3739 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3740 b
->prevent_redisplay_optimizations_p
= 1;
3742 return unbind_to (count
, Qnil
);
3745 /* Overlay dissection functions. */
3747 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3748 doc
: /* Return the position at which OVERLAY starts. */)
3750 Lisp_Object overlay
;
3752 CHECK_OVERLAY (overlay
);
3754 return (Fmarker_position (OVERLAY_START (overlay
)));
3757 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3758 doc
: /* Return the position at which OVERLAY ends. */)
3760 Lisp_Object overlay
;
3762 CHECK_OVERLAY (overlay
);
3764 return (Fmarker_position (OVERLAY_END (overlay
)));
3767 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3768 doc
: /* Return the buffer OVERLAY belongs to. */)
3770 Lisp_Object overlay
;
3772 CHECK_OVERLAY (overlay
);
3774 return Fmarker_buffer (OVERLAY_START (overlay
));
3777 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3778 doc
: /* Return a list of the properties on OVERLAY.
3779 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3782 Lisp_Object overlay
;
3784 CHECK_OVERLAY (overlay
);
3786 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3790 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3791 doc
: /* Return a list of the overlays that contain position POS. */)
3796 Lisp_Object
*overlay_vec
;
3800 CHECK_NUMBER_COERCE_MARKER (pos
);
3803 /* We can't use alloca here because overlays_at can call xrealloc. */
3804 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3806 /* Put all the overlays we want in a vector in overlay_vec.
3807 Store the length in len. */
3808 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3809 (int *) 0, (int *) 0, 0);
3811 /* Make a list of them all. */
3812 result
= Flist (noverlays
, overlay_vec
);
3814 xfree (overlay_vec
);
3818 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3819 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3820 Overlap means that at least one character is contained within the overlay
3821 and also contained within the specified region.
3822 Empty overlays are included in the result if they are located at BEG
3823 or between BEG and END. */)
3825 Lisp_Object beg
, end
;
3828 Lisp_Object
*overlay_vec
;
3832 CHECK_NUMBER_COERCE_MARKER (beg
);
3833 CHECK_NUMBER_COERCE_MARKER (end
);
3836 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3838 /* Put all the overlays we want in a vector in overlay_vec.
3839 Store the length in len. */
3840 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3841 (int *) 0, (int *) 0);
3843 /* Make a list of them all. */
3844 result
= Flist (noverlays
, overlay_vec
);
3846 xfree (overlay_vec
);
3850 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3852 doc
: /* Return the next position after POS where an overlay starts or ends.
3853 If there are no more overlay boundaries after POS, return (point-max). */)
3859 Lisp_Object
*overlay_vec
;
3863 CHECK_NUMBER_COERCE_MARKER (pos
);
3866 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3868 /* Put all the overlays we want in a vector in overlay_vec.
3869 Store the length in len.
3870 endpos gets the position where the next overlay starts. */
3871 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3872 &endpos
, (int *) 0, 1);
3874 /* If any of these overlays ends before endpos,
3875 use its ending point instead. */
3876 for (i
= 0; i
< noverlays
; i
++)
3881 oend
= OVERLAY_END (overlay_vec
[i
]);
3882 oendpos
= OVERLAY_POSITION (oend
);
3883 if (oendpos
< endpos
)
3887 xfree (overlay_vec
);
3888 return make_number (endpos
);
3891 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3892 Sprevious_overlay_change
, 1, 1, 0,
3893 doc
: /* Return the previous position before POS where an overlay starts or ends.
3894 If there are no more overlay boundaries before POS, return (point-min). */)
3900 Lisp_Object
*overlay_vec
;
3903 CHECK_NUMBER_COERCE_MARKER (pos
);
3905 /* At beginning of buffer, we know the answer;
3906 avoid bug subtracting 1 below. */
3907 if (XINT (pos
) == BEGV
)
3911 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3913 /* Put all the overlays we want in a vector in overlay_vec.
3914 Store the length in len.
3915 prevpos gets the position of the previous change. */
3916 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3917 (int *) 0, &prevpos
, 1);
3919 xfree (overlay_vec
);
3920 return make_number (prevpos
);
3923 /* These functions are for debugging overlays. */
3925 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3926 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3927 The car has all the overlays before the overlay center;
3928 the cdr has all the overlays after the overlay center.
3929 Recentering overlays moves overlays between these lists.
3930 The lists you get are copies, so that changing them has no effect.
3931 However, the overlays you get are the real objects that the buffer uses. */)
3934 Lisp_Object before
, after
;
3935 before
= current_buffer
->overlays_before
;
3937 before
= Fcopy_sequence (before
);
3938 after
= current_buffer
->overlays_after
;
3940 after
= Fcopy_sequence (after
);
3942 return Fcons (before
, after
);
3945 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3946 doc
: /* Recenter the overlays of the current buffer around position POS. */)
3950 CHECK_NUMBER_COERCE_MARKER (pos
);
3952 recenter_overlay_lists (current_buffer
, XINT (pos
));
3956 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3957 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
3959 Lisp_Object overlay
, prop
;
3961 CHECK_OVERLAY (overlay
);
3962 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
3965 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3966 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
3967 (overlay
, prop
, value
)
3968 Lisp_Object overlay
, prop
, value
;
3970 Lisp_Object tail
, buffer
;
3973 CHECK_OVERLAY (overlay
);
3975 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3977 for (tail
= XOVERLAY (overlay
)->plist
;
3978 CONSP (tail
) && CONSP (XCDR (tail
));
3979 tail
= XCDR (XCDR (tail
)))
3980 if (EQ (XCAR (tail
), prop
))
3982 changed
= !EQ (XCAR (XCDR (tail
)), value
);
3983 XSETCAR (XCDR (tail
), value
);
3986 /* It wasn't in the list, so add it to the front. */
3987 changed
= !NILP (value
);
3988 XOVERLAY (overlay
)->plist
3989 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3991 if (! NILP (buffer
))
3994 modify_overlay (XBUFFER (buffer
),
3995 marker_position (OVERLAY_START (overlay
)),
3996 marker_position (OVERLAY_END (overlay
)));
3997 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3998 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3999 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4000 Fdelete_overlay (overlay
);
4005 /* Subroutine of report_overlay_modification. */
4007 /* Lisp vector holding overlay hook functions to call.
4008 Vector elements come in pairs.
4009 Each even-index element is a list of hook functions.
4010 The following odd-index element is the overlay they came from.
4012 Before the buffer change, we fill in this vector
4013 as we call overlay hook functions.
4014 After the buffer change, we get the functions to call from this vector.
4015 This way we always call the same functions before and after the change. */
4016 static Lisp_Object last_overlay_modification_hooks
;
4018 /* Number of elements actually used in last_overlay_modification_hooks. */
4019 static int last_overlay_modification_hooks_used
;
4021 /* Add one functionlist/overlay pair
4022 to the end of last_overlay_modification_hooks. */
4025 add_overlay_mod_hooklist (functionlist
, overlay
)
4026 Lisp_Object functionlist
, overlay
;
4028 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4030 if (last_overlay_modification_hooks_used
== oldsize
)
4033 old
= last_overlay_modification_hooks
;
4034 last_overlay_modification_hooks
4035 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
4036 bcopy (XVECTOR (old
)->contents
,
4037 XVECTOR (last_overlay_modification_hooks
)->contents
,
4038 sizeof (Lisp_Object
) * oldsize
);
4040 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
4041 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
4044 /* Run the modification-hooks of overlays that include
4045 any part of the text in START to END.
4046 If this change is an insertion, also
4047 run the insert-before-hooks of overlay starting at END,
4048 and the insert-after-hooks of overlay ending at START.
4050 This is called both before and after the modification.
4051 AFTER is nonzero when we call after the modification.
4053 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4054 When AFTER is nonzero, they are the start position,
4055 the position after the inserted new text,
4056 and the length of deleted or replaced old text. */
4059 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4060 Lisp_Object start
, end
;
4062 Lisp_Object arg1
, arg2
, arg3
;
4064 Lisp_Object prop
, overlay
, tail
;
4065 /* 1 if this change is an insertion. */
4066 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4068 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
4072 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
4076 /* Call the functions recorded in last_overlay_modification_hooks
4077 rather than scanning the overlays again.
4078 First copy the vector contents, in case some of these hooks
4079 do subsequent modification of the buffer. */
4080 int size
= last_overlay_modification_hooks_used
;
4081 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4084 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4085 copy
, size
* sizeof (Lisp_Object
));
4087 gcpro1
.nvars
= size
;
4089 for (i
= 0; i
< size
;)
4091 Lisp_Object prop
, overlay
;
4093 overlay
= copy
[i
++];
4094 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4100 /* We are being called before a change.
4101 Scan the overlays to find the functions to call. */
4102 last_overlay_modification_hooks_used
= 0;
4104 for (tail
= current_buffer
->overlays_before
;
4108 int startpos
, endpos
;
4109 Lisp_Object ostart
, oend
;
4111 overlay
= XCAR (tail
);
4113 ostart
= OVERLAY_START (overlay
);
4114 oend
= OVERLAY_END (overlay
);
4115 endpos
= OVERLAY_POSITION (oend
);
4116 if (XFASTINT (start
) > endpos
)
4118 startpos
= OVERLAY_POSITION (ostart
);
4119 if (insertion
&& (XFASTINT (start
) == startpos
4120 || XFASTINT (end
) == startpos
))
4122 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4125 /* Copy TAIL in case the hook recenters the overlay lists. */
4127 tail
= Fcopy_sequence (tail
);
4129 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4132 if (insertion
&& (XFASTINT (start
) == endpos
4133 || XFASTINT (end
) == endpos
))
4135 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4139 tail
= Fcopy_sequence (tail
);
4141 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4144 /* Test for intersecting intervals. This does the right thing
4145 for both insertion and deletion. */
4146 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4148 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4152 tail
= Fcopy_sequence (tail
);
4154 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4160 for (tail
= current_buffer
->overlays_after
;
4164 int startpos
, endpos
;
4165 Lisp_Object ostart
, oend
;
4167 overlay
= XCAR (tail
);
4169 ostart
= OVERLAY_START (overlay
);
4170 oend
= OVERLAY_END (overlay
);
4171 startpos
= OVERLAY_POSITION (ostart
);
4172 endpos
= OVERLAY_POSITION (oend
);
4173 if (XFASTINT (end
) < startpos
)
4175 if (insertion
&& (XFASTINT (start
) == startpos
4176 || XFASTINT (end
) == startpos
))
4178 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4182 tail
= Fcopy_sequence (tail
);
4184 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4187 if (insertion
&& (XFASTINT (start
) == endpos
4188 || XFASTINT (end
) == endpos
))
4190 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4194 tail
= Fcopy_sequence (tail
);
4196 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4199 /* Test for intersecting intervals. This does the right thing
4200 for both insertion and deletion. */
4201 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4203 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4207 tail
= Fcopy_sequence (tail
);
4209 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4218 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4219 Lisp_Object list
, overlay
;
4221 Lisp_Object arg1
, arg2
, arg3
;
4223 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4225 GCPRO4 (list
, arg1
, arg2
, arg3
);
4227 add_overlay_mod_hooklist (list
, overlay
);
4229 while (CONSP (list
))
4232 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4234 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4240 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4243 evaporate_overlays (pos
)
4246 Lisp_Object tail
, overlay
, hit_list
;
4249 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
4250 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
4254 overlay
= XCAR (tail
);
4255 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4258 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4259 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4260 hit_list
= Fcons (overlay
, hit_list
);
4263 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
4267 overlay
= XCAR (tail
);
4268 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4271 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4272 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4273 hit_list
= Fcons (overlay
, hit_list
);
4275 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4276 Fdelete_overlay (XCAR (hit_list
));
4279 /* Somebody has tried to store a value with an unacceptable type
4280 in the slot with offset OFFSET. */
4283 buffer_slot_type_mismatch (offset
)
4289 switch (XINT (PER_BUFFER_TYPE (offset
)))
4292 type_name
= "integers";
4296 type_name
= "strings";
4300 type_name
= "symbols";
4307 sym
= PER_BUFFER_SYMBOL (offset
);
4308 error ("Only %s should be stored in the buffer-local variable %s",
4309 type_name
, SDATA (SYMBOL_NAME (sym
)));
4313 /***********************************************************************
4314 Allocation with mmap
4315 ***********************************************************************/
4317 #ifdef USE_MMAP_FOR_BUFFERS
4319 #include <sys/types.h>
4320 #include <sys/mman.h>
4323 #ifdef MAP_ANONYMOUS
4324 #define MAP_ANON MAP_ANONYMOUS
4331 #define MAP_FAILED ((void *) -1)
4344 /* Memory is allocated in regions which are mapped using mmap(2).
4345 The current implementation lets the system select mapped
4346 addresses; we're not using MAP_FIXED in general, except when
4347 trying to enlarge regions.
4349 Each mapped region starts with a mmap_region structure, the user
4350 area starts after that structure, aligned to MEM_ALIGN.
4352 +-----------------------+
4353 | struct mmap_info + |
4355 +-----------------------+
4359 +-----------------------+ */
4363 /* User-specified size. */
4364 size_t nbytes_specified
;
4366 /* Number of bytes mapped */
4367 size_t nbytes_mapped
;
4369 /* Pointer to the location holding the address of the memory
4370 allocated with the mmap'd block. The variable actually points
4371 after this structure. */
4374 /* Next and previous in list of all mmap'd regions. */
4375 struct mmap_region
*next
, *prev
;
4378 /* Doubly-linked list of mmap'd regions. */
4380 static struct mmap_region
*mmap_regions
;
4382 /* File descriptor for mmap. If we don't have anonymous mapping,
4383 /dev/zero will be opened on it. */
4387 /* Temporary storage for mmap_set_vars, see there. */
4389 static struct mmap_region
*mmap_regions_1
;
4390 static int mmap_fd_1
;
4392 /* Page size on this system. */
4394 static int mmap_page_size
;
4396 /* 1 means mmap has been intialized. */
4398 static int mmap_initialized_p
;
4400 /* Value is X rounded up to the next multiple of N. */
4402 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4404 /* Size of mmap_region structure plus padding. */
4406 #define MMAP_REGION_STRUCT_SIZE \
4407 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4409 /* Given a pointer P to the start of the user-visible part of a mapped
4410 region, return a pointer to the start of the region. */
4412 #define MMAP_REGION(P) \
4413 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4415 /* Given a pointer P to the start of a mapped region, return a pointer
4416 to the start of the user-visible part of the region. */
4418 #define MMAP_USER_AREA(P) \
4419 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4421 #define MEM_ALIGN sizeof (double)
4423 /* Predicate returning true if part of the address range [START .. END]
4424 is currently mapped. Used to prevent overwriting an existing
4427 Default is to conservativly assume the address range is occupied by
4428 something else. This can be overridden by system configuration
4429 files if system-specific means to determine this exists. */
4431 #ifndef MMAP_ALLOCATED_P
4432 #define MMAP_ALLOCATED_P(start, end) 1
4435 /* Function prototypes. */
4437 static int mmap_free_1
P_ ((struct mmap_region
*));
4438 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4439 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4440 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4441 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4442 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4443 static void mmap_init
P_ ((void));
4446 /* Return a region overlapping address range START...END, or null if
4447 none. END is not including, i.e. the last byte in the range
4450 static struct mmap_region
*
4451 mmap_find (start
, end
)
4452 POINTER_TYPE
*start
, *end
;
4454 struct mmap_region
*r
;
4455 char *s
= (char *) start
, *e
= (char *) end
;
4457 for (r
= mmap_regions
; r
; r
= r
->next
)
4459 char *rstart
= (char *) r
;
4460 char *rend
= rstart
+ r
->nbytes_mapped
;
4462 if (/* First byte of range, i.e. START, in this region? */
4463 (s
>= rstart
&& s
< rend
)
4464 /* Last byte of range, i.e. END - 1, in this region? */
4465 || (e
> rstart
&& e
<= rend
)
4466 /* First byte of this region in the range? */
4467 || (rstart
>= s
&& rstart
< e
)
4468 /* Last byte of this region in the range? */
4469 || (rend
> s
&& rend
<= e
))
4477 /* Unmap a region. P is a pointer to the start of the user-araa of
4478 the region. Value is non-zero if successful. */
4482 struct mmap_region
*r
;
4485 r
->next
->prev
= r
->prev
;
4487 r
->prev
->next
= r
->next
;
4489 mmap_regions
= r
->next
;
4491 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4493 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4501 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4502 Value is non-zero if successful. */
4505 mmap_enlarge (r
, npages
)
4506 struct mmap_region
*r
;
4509 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4515 /* Unmap pages at the end of the region. */
4516 nbytes
= - npages
* mmap_page_size
;
4517 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4518 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4521 r
->nbytes_mapped
-= nbytes
;
4525 else if (npages
> 0)
4527 nbytes
= npages
* mmap_page_size
;
4529 /* Try to map additional pages at the end of the region. We
4530 cannot do this if the address range is already occupied by
4531 something else because mmap deletes any previous mapping.
4532 I'm not sure this is worth doing, let's see. */
4533 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4537 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4538 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4539 if (p
== MAP_FAILED
)
4540 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4541 else if (p
!= (POINTER_TYPE
*) region_end
)
4543 /* Kernels are free to choose a different address. In
4544 that case, unmap what we've mapped above; we have
4546 if (munmap (p
, nbytes
) == -1)
4547 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4551 r
->nbytes_mapped
+= nbytes
;
4561 /* Set or reset variables holding references to mapped regions. If
4562 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4563 non-zero, set all variables to the start of the user-areas
4566 This function is called from Fdump_emacs to ensure that the dumped
4567 Emacs doesn't contain references to memory that won't be mapped
4568 when Emacs starts. */
4571 mmap_set_vars (restore_p
)
4574 struct mmap_region
*r
;
4578 mmap_regions
= mmap_regions_1
;
4579 mmap_fd
= mmap_fd_1
;
4580 for (r
= mmap_regions
; r
; r
= r
->next
)
4581 *r
->var
= MMAP_USER_AREA (r
);
4585 for (r
= mmap_regions
; r
; r
= r
->next
)
4587 mmap_regions_1
= mmap_regions
;
4588 mmap_regions
= NULL
;
4589 mmap_fd_1
= mmap_fd
;
4595 /* Allocate a block of storage large enough to hold NBYTES bytes of
4596 data. A pointer to the data is returned in *VAR. VAR is thus the
4597 address of some variable which will use the data area.
4599 The allocation of 0 bytes is valid.
4601 If we can't allocate the necessary memory, set *VAR to null, and
4604 static POINTER_TYPE
*
4605 mmap_alloc (var
, nbytes
)
4614 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4615 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4618 if (p
== MAP_FAILED
)
4620 if (errno
!= ENOMEM
)
4621 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4626 struct mmap_region
*r
= (struct mmap_region
*) p
;
4628 r
->nbytes_specified
= nbytes
;
4629 r
->nbytes_mapped
= map
;
4632 r
->next
= mmap_regions
;
4637 p
= MMAP_USER_AREA (p
);
4644 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4645 resize it to size NBYTES. Change *VAR to reflect the new block,
4646 and return this value. If more memory cannot be allocated, then
4647 leave *VAR unchanged, and return null. */
4649 static POINTER_TYPE
*
4650 mmap_realloc (var
, nbytes
)
4654 POINTER_TYPE
*result
;
4659 result
= mmap_alloc (var
, nbytes
);
4660 else if (nbytes
== 0)
4663 result
= mmap_alloc (var
, nbytes
);
4667 struct mmap_region
*r
= MMAP_REGION (*var
);
4668 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4673 POINTER_TYPE
*old_ptr
= *var
;
4675 /* Try to map additional pages at the end of the region.
4676 If that fails, allocate a new region, copy data
4677 from the old region, then free it. */
4678 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4681 r
->nbytes_specified
= nbytes
;
4682 *var
= result
= old_ptr
;
4684 else if (mmap_alloc (var
, nbytes
))
4686 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4687 mmap_free_1 (MMAP_REGION (old_ptr
));
4689 r
= MMAP_REGION (result
);
4690 r
->nbytes_specified
= nbytes
;
4698 else if (room
- nbytes
>= mmap_page_size
)
4700 /* Shrinking by at least a page. Let's give some
4701 memory back to the system.
4703 The extra parens are to make the division happens first,
4704 on positive values, so we know it will round towards
4706 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4708 r
->nbytes_specified
= nbytes
;
4712 /* Leave it alone. */
4714 r
->nbytes_specified
= nbytes
;
4722 /* Free a block of relocatable storage whose data is pointed to by
4723 PTR. Store 0 in *PTR to show there's no block allocated. */
4733 mmap_free_1 (MMAP_REGION (*var
));
4739 /* Perform necessary intializations for the use of mmap. */
4745 /* The value of mmap_fd is initially 0 in temacs, and -1
4746 in a dumped Emacs. */
4749 /* No anonymous mmap -- we need the file descriptor. */
4750 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4752 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4754 #endif /* MAP_ANON == 0 */
4756 if (mmap_initialized_p
)
4758 mmap_initialized_p
= 1;
4764 mmap_page_size
= getpagesize ();
4767 #endif /* USE_MMAP_FOR_BUFFERS */
4771 /***********************************************************************
4772 Buffer-text Allocation
4773 ***********************************************************************/
4776 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4777 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4778 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4779 #endif /* REL_ALLOC */
4782 /* Allocate NBYTES bytes for buffer B's text buffer. */
4785 alloc_buffer_text (b
, nbytes
)
4792 #if defined USE_MMAP_FOR_BUFFERS
4793 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4794 #elif defined REL_ALLOC
4795 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4797 p
= xmalloc (nbytes
);
4806 b
->text
->beg
= (unsigned char *) p
;
4810 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4814 enlarge_buffer_text (b
, delta
)
4819 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4822 #if defined USE_MMAP_FOR_BUFFERS
4823 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4824 #elif defined REL_ALLOC
4825 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4827 p
= xrealloc (b
->text
->beg
, nbytes
);
4836 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4841 /* Free buffer B's text buffer. */
4844 free_buffer_text (b
)
4849 #if defined USE_MMAP_FOR_BUFFERS
4850 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4851 #elif defined REL_ALLOC
4852 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4854 xfree (b
->text
->beg
);
4857 BUF_BEG_ADDR (b
) = NULL
;
4863 /***********************************************************************
4865 ***********************************************************************/
4872 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4874 /* Make sure all markable slots in buffer_defaults
4875 are initialized reasonably, so mark_buffer won't choke. */
4876 reset_buffer (&buffer_defaults
);
4877 reset_buffer_local_variables (&buffer_defaults
, 1);
4878 reset_buffer (&buffer_local_symbols
);
4879 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4880 /* Prevent GC from getting confused. */
4881 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4882 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4883 BUF_INTERVALS (&buffer_defaults
) = 0;
4884 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4885 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4886 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4888 /* Set up the default values of various buffer slots. */
4889 /* Must do these before making the first buffer! */
4891 /* real setup is done in bindings.el */
4892 buffer_defaults
.mode_line_format
= build_string ("%-");
4893 buffer_defaults
.header_line_format
= Qnil
;
4894 buffer_defaults
.abbrev_mode
= Qnil
;
4895 buffer_defaults
.overwrite_mode
= Qnil
;
4896 buffer_defaults
.case_fold_search
= Qt
;
4897 buffer_defaults
.auto_fill_function
= Qnil
;
4898 buffer_defaults
.selective_display
= Qnil
;
4900 buffer_defaults
.selective_display_ellipses
= Qt
;
4902 buffer_defaults
.abbrev_table
= Qnil
;
4903 buffer_defaults
.display_table
= Qnil
;
4904 buffer_defaults
.undo_list
= Qnil
;
4905 buffer_defaults
.mark_active
= Qnil
;
4906 buffer_defaults
.file_format
= Qnil
;
4907 buffer_defaults
.overlays_before
= Qnil
;
4908 buffer_defaults
.overlays_after
= Qnil
;
4909 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
4911 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4912 buffer_defaults
.truncate_lines
= Qnil
;
4913 buffer_defaults
.ctl_arrow
= Qt
;
4914 buffer_defaults
.direction_reversed
= Qnil
;
4915 buffer_defaults
.cursor_type
= Qt
;
4916 buffer_defaults
.extra_line_spacing
= Qnil
;
4919 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4921 buffer_defaults
.enable_multibyte_characters
= Qt
;
4922 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4923 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4924 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4925 buffer_defaults
.cache_long_line_scans
= Qnil
;
4926 buffer_defaults
.file_truename
= Qnil
;
4927 XSETFASTINT (buffer_defaults
.display_count
, 0);
4928 buffer_defaults
.indicate_empty_lines
= Qnil
;
4929 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4930 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4931 buffer_defaults
.display_time
= Qnil
;
4933 /* Assign the local-flags to the slots that have default values.
4934 The local flag is a bit that is used in the buffer
4935 to say that it has its own local value for the slot.
4936 The local flag bits are in the local_var_flags slot of the buffer. */
4938 /* Nothing can work if this isn't true */
4939 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4941 /* 0 means not a lisp var, -1 means always local, else mask */
4942 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4943 XSETINT (buffer_local_flags
.filename
, -1);
4944 XSETINT (buffer_local_flags
.directory
, -1);
4945 XSETINT (buffer_local_flags
.backed_up
, -1);
4946 XSETINT (buffer_local_flags
.save_length
, -1);
4947 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
4948 XSETINT (buffer_local_flags
.read_only
, -1);
4949 XSETINT (buffer_local_flags
.major_mode
, -1);
4950 XSETINT (buffer_local_flags
.mode_name
, -1);
4951 XSETINT (buffer_local_flags
.undo_list
, -1);
4952 XSETINT (buffer_local_flags
.mark_active
, -1);
4953 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
4954 XSETINT (buffer_local_flags
.file_truename
, -1);
4955 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
4956 XSETINT (buffer_local_flags
.file_format
, -1);
4957 XSETINT (buffer_local_flags
.display_count
, -1);
4958 XSETINT (buffer_local_flags
.display_time
, -1);
4959 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
4962 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
4963 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
4964 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
4965 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
4966 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
4967 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
4969 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
4971 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
4972 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
4973 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
4974 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
4975 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
4976 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
4977 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
4979 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
4980 /* Make this one a permanent local. */
4981 buffer_permanent_local_flags
[idx
++] = 1;
4983 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
4984 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
4985 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
4986 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
4987 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
4988 /* Make this one a permanent local. */
4989 buffer_permanent_local_flags
[idx
++] = 1;
4990 XSETFASTINT (buffer_local_flags
.left_margin_width
, idx
); ++idx
;
4991 XSETFASTINT (buffer_local_flags
.right_margin_width
, idx
); ++idx
;
4992 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
4993 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
4994 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
4995 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
4996 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
4997 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
4999 /* Need more room? */
5000 if (idx
>= MAX_PER_BUFFER_VARS
)
5002 last_per_buffer_idx
= idx
;
5004 Vbuffer_alist
= Qnil
;
5008 QSFundamental
= build_string ("Fundamental");
5010 Qfundamental_mode
= intern ("fundamental-mode");
5011 buffer_defaults
.major_mode
= Qfundamental_mode
;
5013 Qmode_class
= intern ("mode-class");
5015 Qprotected_field
= intern ("protected-field");
5017 Qpermanent_local
= intern ("permanent-local");
5019 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5021 Qucs_set_table_for_input
= intern ("ucs-set-table-for-input");
5023 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
5025 /* super-magic invisible buffer */
5026 Vbuffer_alist
= Qnil
;
5028 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5030 inhibit_modification_hooks
= 0;
5036 char buf
[MAXPATHLEN
+ 1];
5038 struct stat dotstat
, pwdstat
;
5042 #ifdef USE_MMAP_FOR_BUFFERS
5044 /* When using the ralloc implementation based on mmap(2), buffer
5045 text pointers will have been set to null in the dumped Emacs.
5049 for (b
= all_buffers
; b
; b
= b
->next
)
5050 if (b
->text
->beg
== NULL
)
5051 enlarge_buffer_text (b
, 0);
5053 #endif /* USE_MMAP_FOR_BUFFERS */
5055 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5056 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5057 Fset_buffer_multibyte (Qnil
);
5059 /* If PWD is accurate, use it instead of calling getwd. PWD is
5060 sometimes a nicer name, and using it may avoid a fatal error if a
5061 parent directory is searchable but not readable. */
5062 if ((pwd
= getenv ("PWD")) != 0
5063 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
5064 && stat (pwd
, &pwdstat
) == 0
5065 && stat (".", &dotstat
) == 0
5066 && dotstat
.st_ino
== pwdstat
.st_ino
5067 && dotstat
.st_dev
== pwdstat
.st_dev
5068 && strlen (pwd
) < MAXPATHLEN
)
5071 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
5072 fatal ("`getcwd' failed: %s\n", strerror (errno
));
5074 else if (getwd (buf
) == 0)
5075 fatal ("`getwd' failed: %s\n", buf
);
5079 /* Maybe this should really use some standard subroutine
5080 whose definition is filename syntax dependent. */
5082 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
5084 buf
[rc
] = DIRECTORY_SEP
;
5087 #endif /* not VMS */
5089 current_buffer
->directory
= build_string (buf
);
5091 /* Add /: to the front of the name
5092 if it would otherwise be treated as magic. */
5093 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5095 /* If the default dir is just /, TEMP is non-nil
5096 because of the ange-ftp completion handler.
5097 However, it is not necessary to turn / into /:/.
5098 So avoid doing that. */
5099 && strcmp ("/", SDATA (current_buffer
->directory
)))
5100 current_buffer
->directory
5101 = concat2 (build_string ("/:"), current_buffer
->directory
);
5103 temp
= get_minibuffer (0);
5104 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5107 /* initialize the buffer routines */
5111 staticpro (&last_overlay_modification_hooks
);
5112 last_overlay_modification_hooks
5113 = Fmake_vector (make_number (10), Qnil
);
5115 staticpro (&Vbuffer_defaults
);
5116 staticpro (&Vbuffer_local_symbols
);
5117 staticpro (&Qfundamental_mode
);
5118 staticpro (&Qmode_class
);
5119 staticpro (&QSFundamental
);
5120 staticpro (&Vbuffer_alist
);
5121 staticpro (&Qprotected_field
);
5122 staticpro (&Qpermanent_local
);
5123 staticpro (&Qkill_buffer_hook
);
5124 Qoverlayp
= intern ("overlayp");
5125 staticpro (&Qoverlayp
);
5126 Qevaporate
= intern ("evaporate");
5127 staticpro (&Qevaporate
);
5128 Qmodification_hooks
= intern ("modification-hooks");
5129 staticpro (&Qmodification_hooks
);
5130 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5131 staticpro (&Qinsert_in_front_hooks
);
5132 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5133 staticpro (&Qinsert_behind_hooks
);
5134 Qget_file_buffer
= intern ("get-file-buffer");
5135 staticpro (&Qget_file_buffer
);
5136 Qpriority
= intern ("priority");
5137 staticpro (&Qpriority
);
5138 Qwindow
= intern ("window");
5139 staticpro (&Qwindow
);
5140 Qbefore_string
= intern ("before-string");
5141 staticpro (&Qbefore_string
);
5142 Qafter_string
= intern ("after-string");
5143 staticpro (&Qafter_string
);
5144 Qfirst_change_hook
= intern ("first-change-hook");
5145 staticpro (&Qfirst_change_hook
);
5146 Qbefore_change_functions
= intern ("before-change-functions");
5147 staticpro (&Qbefore_change_functions
);
5148 Qafter_change_functions
= intern ("after-change-functions");
5149 staticpro (&Qafter_change_functions
);
5150 staticpro (&Qucs_set_table_for_input
);
5152 Fput (Qprotected_field
, Qerror_conditions
,
5153 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5154 Fput (Qprotected_field
, Qerror_message
,
5155 build_string ("Attempt to modify a protected field"));
5157 /* All these use DEFVAR_LISP_NOPRO because the slots in
5158 buffer_defaults will all be marked via Vbuffer_defaults. */
5160 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5161 &buffer_defaults
.mode_line_format
,
5162 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5163 This is the same as (default-value 'mode-line-format). */);
5165 DEFVAR_LISP_NOPRO ("default-header-line-format",
5166 &buffer_defaults
.header_line_format
,
5167 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5168 This is the same as (default-value 'header-line-format). */);
5170 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5171 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5172 This is the same as (default-value 'cursor-type). */);
5174 DEFVAR_LISP_NOPRO ("default-line-spacing",
5175 &buffer_defaults
.extra_line_spacing
,
5176 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5177 This is the same as (default-value 'line-spacing). */);
5179 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5180 &buffer_defaults
.abbrev_mode
,
5181 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5182 This is the same as (default-value 'abbrev-mode). */);
5184 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5185 &buffer_defaults
.ctl_arrow
,
5186 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5187 This is the same as (default-value 'ctl-arrow). */);
5189 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5190 &buffer_defaults
.direction_reversed
,
5191 doc
: /* Default value of `direction_reversed' for buffers that do not override it.
5192 This is the same as (default-value 'direction-reversed). */);
5194 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5195 &buffer_defaults
.enable_multibyte_characters
,
5196 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5197 This is the same as (default-value 'enable-multibyte-characters). */);
5199 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5200 &buffer_defaults
.buffer_file_coding_system
,
5201 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5202 This is the same as (default-value 'buffer-file-coding-system). */);
5204 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5205 &buffer_defaults
.truncate_lines
,
5206 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5207 This is the same as (default-value 'truncate-lines). */);
5209 DEFVAR_LISP_NOPRO ("default-fill-column",
5210 &buffer_defaults
.fill_column
,
5211 doc
: /* Default value of `fill-column' for buffers that do not override it.
5212 This is the same as (default-value 'fill-column). */);
5214 DEFVAR_LISP_NOPRO ("default-left-margin",
5215 &buffer_defaults
.left_margin
,
5216 doc
: /* Default value of `left-margin' for buffers that do not override it.
5217 This is the same as (default-value 'left-margin). */);
5219 DEFVAR_LISP_NOPRO ("default-tab-width",
5220 &buffer_defaults
.tab_width
,
5221 doc
: /* Default value of `tab-width' for buffers that do not override it.
5222 This is the same as (default-value 'tab-width). */);
5224 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5225 &buffer_defaults
.case_fold_search
,
5226 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5227 This is the same as (default-value 'case-fold-search). */);
5230 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5231 &buffer_defaults
.buffer_file_type
,
5232 doc
: /* Default file type for buffers that do not override it.
5233 This is the same as (default-value 'buffer-file-type).
5234 The file type is nil for text, t for binary. */);
5237 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5238 &buffer_defaults
.left_margin_width
,
5239 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5240 This is the same as (default-value 'left-margin-width). */);
5242 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5243 &buffer_defaults
.right_margin_width
,
5244 doc
: /* Default value of `right_margin_width' for buffers that don't override it.
5245 This is the same as (default-value 'right-margin-width). */);
5247 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5248 &buffer_defaults
.indicate_empty_lines
,
5249 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5250 This is the same as (default-value 'indicate-empty-lines). */);
5252 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5253 &buffer_defaults
.scroll_up_aggressively
,
5254 doc
: /* Default value of `scroll-up-aggressively'.
5255 This value applies in buffers that don't have their own local values.
5256 This variable is an alias for (default-value 'scroll-up-aggressively). */);
5258 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5259 &buffer_defaults
.scroll_down_aggressively
,
5260 doc
: /* Default value of `scroll-down-aggressively'.
5261 This value applies in buffers that don't have their own local values.
5262 This variable is an alias for (default-value 'scroll-down-aggressively). */);
5264 DEFVAR_PER_BUFFER ("header-line-format",
5265 ¤t_buffer
->header_line_format
,
5267 doc
: /* Analogous to `mode-line-format', but controls the header line.
5268 The header line appears, optionally, at the top of a window;
5269 the mode line appears at the bottom. */);
5271 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5273 doc
: /* Template for displaying mode line for current buffer.
5274 Each buffer has its own value of this variable.
5275 Value may be nil, a string, a symbol or a list or cons cell.
5276 A value of nil means don't display a mode line.
5277 For a symbol, its value is used (but it is ignored if t or nil).
5278 A string appearing directly as the value of a symbol is processed verbatim
5279 in that the %-constructs below are not recognized.
5280 Note that unless the symbol is marked as a `risky-local-variable', all
5281 properties in any strings, as well as all :eval and :propertize forms
5282 in the value of that symbol will be ignored.
5283 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5284 is used as a mode line element. Be careful--FORM should not load any files,
5285 because that can cause an infinite recursion.
5286 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5287 with the specified properties PROPS applied.
5288 For a list whose car is a symbol, the symbol's value is taken,
5289 and if that is non-nil, the cadr of the list is processed recursively.
5290 Otherwise, the caddr of the list (if there is one) is processed.
5291 For a list whose car is a string or list, each element is processed
5292 recursively and the results are effectively concatenated.
5293 For a list whose car is an integer, the cdr of the list is processed
5294 and padded (if the number is positive) or truncated (if negative)
5295 to the width specified by that number.
5296 A string is printed verbatim in the mode line except for %-constructs:
5297 (%-constructs are allowed when the string is the entire mode-line-format
5298 or when it is found in a cons-cell or a list)
5299 %b -- print buffer name. %f -- print visited file name.
5300 %F -- print frame name.
5301 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5302 %& is like %*, but ignore read-only-ness.
5303 % means buffer is read-only and * means it is modified.
5304 For a modified read-only buffer, %* gives % and %+ gives *.
5305 %s -- print process status. %l -- print the current line number.
5306 %c -- print the current column number (this makes editing slower).
5307 To make the column number update correctly in all cases,
5308 `column-number-mode' must be non-nil.
5309 %p -- print percent of buffer above top of window, or Top, Bot or All.
5310 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5311 or print Bottom or All.
5312 %m -- print the mode name.
5313 %n -- print Narrow if appropriate.
5314 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5315 %Z -- like %z, but including the end-of-line format.
5316 %[ -- print one [ for each recursive editing level. %] similar.
5317 %% -- print %. %- -- print infinitely many dashes.
5318 Decimal digits after the % specify field width to which to pad. */);
5320 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5321 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5322 nil here means use current buffer's major mode. */);
5324 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5325 make_number (Lisp_Symbol
),
5326 doc
: /* Symbol for current buffer's major mode. */);
5328 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5330 doc
: /* Pretty name of current buffer's major mode (a string). */);
5332 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5333 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5335 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5337 doc
: /* *Non-nil if searches and matches should ignore case. */);
5339 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5340 make_number (Lisp_Int
),
5341 doc
: /* *Column beyond which automatic line-wrapping should happen.
5342 Interactively, you can set this using \\[set-fill-column]. */);
5344 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5345 make_number (Lisp_Int
),
5346 doc
: /* *Column for the default indent-line-function to indent to.
5347 Linefeed indents to this column in Fundamental mode. */);
5349 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5350 make_number (Lisp_Int
),
5351 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5353 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5354 doc
: /* *Non-nil means display control chars with uparrow.
5355 A value of nil means use backslash and octal digits.
5356 This variable does not apply to characters whose display is specified
5357 in the current display table (if there is one). */);
5359 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5360 ¤t_buffer
->enable_multibyte_characters
,
5362 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5363 Otherwise they are regarded as unibyte. This affects the display,
5364 file I/O and the behavior of various editing commands.
5366 This variable is buffer-local but you cannot set it directly;
5367 use the function `set-buffer-multibyte' to change a buffer's representation.
5368 Changing its default value with `setq-default' is supported.
5369 See also variable `default-enable-multibyte-characters' and Info node
5370 `(elisp)Text Representations'. */);
5372 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5373 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5374 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5375 This variable applies to saving the buffer, and also to `write-region'
5376 and other functions that use `write-region'.
5377 It does not apply to sending output to subprocesses, however.
5379 If this is nil, the buffer is saved without any code conversion
5380 unless some coding system is specified in `file-coding-system-alist'
5381 for the buffer file.
5383 If the text to be saved cannot be encoded as specified by this variable,
5384 an alternative encoding is selected by `select-safe-coding-system', which see.
5386 The variable `coding-system-for-write', if non-nil, overrides this variable.
5388 This variable is never applied to a way of decoding a file while reading it. */);
5390 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5392 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5394 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5395 doc
: /* *Non-nil means do not display continuation lines.
5396 Instead, give each line of text just one screen line.
5398 Note that this is overridden by the variable
5399 `truncate-partial-width-windows' if that variable is non-nil
5400 and this buffer is not full-frame width. */);
5403 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5405 doc
: /* Non-nil if the visited file is a binary file.
5406 This variable is meaningful on MS-DOG and Windows NT.
5407 On those systems, it is automatically local in every buffer.
5408 On other systems, this variable is normally always nil. */);
5411 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5412 make_number (Lisp_String
),
5413 doc
: /* Name of default directory of current buffer. Should end with slash.
5414 To interactively change the default directory, use command `cd'. */);
5416 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5418 doc
: /* Function called (if non-nil) to perform auto-fill.
5419 It is called after self-inserting any character specified in
5420 the `auto-fill-chars' table.
5421 NOTE: This variable is not a hook;
5422 its value may not be a list of functions. */);
5424 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5425 make_number (Lisp_String
),
5426 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5428 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5429 make_number (Lisp_String
),
5430 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5431 The truename of a file is calculated by `file-truename'
5432 and then abbreviated with `abbreviate-file-name'. */);
5434 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5435 ¤t_buffer
->auto_save_file_name
,
5436 make_number (Lisp_String
),
5437 doc
: /* Name of file for auto-saving current buffer.
5438 If it is nil, that means don't auto-save this buffer. */);
5440 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5441 doc
: /* Non-nil if this buffer is read-only. */);
5443 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5444 doc
: /* Non-nil if this buffer's file has been backed up.
5445 Backing up is done before the first time the file is saved. */);
5447 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5448 make_number (Lisp_Int
),
5449 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5452 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5454 doc
: /* Non-nil enables selective display.
5455 An Integer N as value means display only lines
5456 that start with less than n columns of space.
5457 A value of t means that the character ^M makes itself and
5458 all the rest of the line invisible; also, when saving the buffer
5459 in a file, save the ^M as a newline. */);
5462 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5463 ¤t_buffer
->selective_display_ellipses
,
5465 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5468 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5469 doc
: /* Non-nil if self-insertion should replace existing text.
5470 The value should be one of `overwrite-mode-textual',
5471 `overwrite-mode-binary', or nil.
5472 If it is `overwrite-mode-textual', self-insertion still
5473 inserts at the end of a line, and inserts when point is before a tab,
5474 until the tab is filled in.
5475 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5477 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5479 doc
: /* Display table that controls display of the contents of current buffer.
5481 If this variable is nil, the value of `standard-display-table' is used.
5482 Each window can have its own, overriding display table, see
5483 `set-window-display-table' and `window-display-table'.
5485 The display table is a char-table created with `make-display-table'.
5486 A char-table is an array indexed by character codes. Normal array
5487 primitives `aref' and `aset' can be used to access elements of a char-table.
5489 Each of the char-table elements control how to display the corresponding
5490 text character: the element at index C in the table says how to display
5491 the character whose code is C. Each element should be a vector of
5492 characters or nil. nil means display the character in the default fashion;
5493 otherwise, the characters from the vector are delivered to the screen
5494 instead of the original character.
5496 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5497 a capital Y instead of each X character.
5499 In addition, a char-table has six extra slots to control the display of:
5501 the end of a truncated screen line (extra-slot 0, a single character);
5502 the end of a continued line (extra-slot 1, a single character);
5503 the escape character used to display character codes in octal
5504 (extra-slot 2, a single character);
5505 the character used as an arrow for control characters (extra-slot 3,
5506 a single character);
5507 the decoration indicating the presence of invisible lines (extra-slot 4,
5508 a vector of characters);
5509 the character used to draw the border between side-by-side windows
5510 (extra-slot 5, a single character).
5512 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5514 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_width
,
5516 doc
: /* *Width of left marginal area for display of a buffer.
5517 A value of nil means no marginal area. */);
5519 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_width
,
5521 doc
: /* *Width of right marginal area for display of a buffer.
5522 A value of nil means no marginal area. */);
5524 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5525 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5526 doc
: /* *Visually indicate empty lines after the buffer end.
5527 If non-nil, a bitmap is displayed in the left fringe of a window on
5528 window-systems. */);
5530 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5531 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5532 doc
: /* How far to scroll windows upward.
5533 If you move point off the bottom, the window scrolls automatically.
5534 This variable controls how far it scrolls. nil, the default,
5535 means scroll to center point. A fraction means scroll to put point
5536 that fraction of the window's height from the bottom of the window.
5537 When the value is 0.0, point goes at the bottom line, which in the simple
5538 case that you moved off with C-f means scrolling just one line. 1.0 means
5539 point goes at the top, so that in that simple case, the window
5540 window scrolls by a full window height. Meaningful values are
5541 between 0.0 and 1.0, inclusive. */);
5543 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5544 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5545 doc
: /* How far to scroll windows downward.
5546 If you move point off the top, the window scrolls automatically.
5547 This variable controls how far it scrolls. nil, the default,
5548 means scroll to center point. A fraction means scroll to put point
5549 that fraction of the window's height from the top of the window.
5550 When the value is 0.0, point goes at the top line, which in the simple
5551 case that you moved off with C-b means scrolling just one line. 1.0 means
5552 point goes at the bottom, so that in that simple case, the window
5553 window scrolls by a full window height. Meaningful values are
5554 between 0.0 and 1.0, inclusive. */);
5556 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5560 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5561 doc
: /* List of functions to call before each text change.
5562 Two arguments are passed to each function: the positions of
5563 the beginning and end of the range of old text to be changed.
5564 \(For an insertion, the beginning and end are at the same place.)
5565 No information is given about the length of the text after the change.
5567 Buffer changes made while executing the `before-change-functions'
5568 don't call any before-change or after-change functions.
5569 That's because these variables are temporarily set to nil.
5570 As a result, a hook function cannot straightforwardly alter the value of
5571 these variables. See the Emacs Lisp manual for a way of
5572 accomplishing an equivalent result by using other variables.
5574 If an unhandled error happens in running these functions,
5575 the variable's value remains nil. That prevents the error
5576 from happening repeatedly and making Emacs nonfunctional. */);
5577 Vbefore_change_functions
= Qnil
;
5579 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5580 doc
: /* List of functions to call after each text change.
5581 Three arguments are passed to each function: the positions of
5582 the beginning and end of the range of changed text,
5583 and the length in bytes of the pre-change text replaced by that range.
5584 \(For an insertion, the pre-change length is zero;
5585 for a deletion, that length is the number of bytes deleted,
5586 and the post-change beginning and end are at the same place.)
5588 Buffer changes made while executing the `after-change-functions'
5589 don't call any before-change or after-change functions.
5590 That's because these variables are temporarily set to nil.
5591 As a result, a hook function cannot straightforwardly alter the value of
5592 these variables. See the Emacs Lisp manual for a way of
5593 accomplishing an equivalent result by using other variables.
5595 If an unhandled error happens in running these functions,
5596 the variable's value remains nil. That prevents the error
5597 from happening repeatedly and making Emacs nonfunctional. */);
5598 Vafter_change_functions
= Qnil
;
5600 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5601 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5602 The functions are run using the `run-hooks' function. */);
5603 Vfirst_change_hook
= Qnil
;
5605 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5606 doc
: /* List of undo entries in current buffer.
5607 Recent changes come first; older changes follow newer.
5609 An entry (BEG . END) represents an insertion which begins at
5610 position BEG and ends at position END.
5612 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5613 from (abs POSITION). If POSITION is positive, point was at the front
5614 of the text being deleted; if negative, point was at the end.
5616 An entry (t HIGH . LOW) indicates that the buffer previously had
5617 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5618 of the visited file's modification time, as of that time. If the
5619 modification time of the most recent save is different, this entry is
5622 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5623 was modified between BEG and END. PROPERTY is the property name,
5624 and VALUE is the old value.
5626 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5627 was adjusted in position by the offset DISTANCE (an integer).
5629 An entry of the form POSITION indicates that point was at the buffer
5630 location given by the integer. Undoing an entry of this form places
5633 nil marks undo boundaries. The undo command treats the changes
5634 between two undo boundaries as a single step to be undone.
5636 If the value of the variable is t, undo information is not recorded. */);
5638 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5639 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5641 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5642 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5644 Normally, the line-motion functions work by scanning the buffer for
5645 newlines. Columnar operations (like move-to-column and
5646 compute-motion) also work by scanning the buffer, summing character
5647 widths as they go. This works well for ordinary text, but if the
5648 buffer's lines are very long (say, more than 500 characters), these
5649 motion functions will take longer to execute. Emacs may also take
5650 longer to update the display.
5652 If cache-long-line-scans is non-nil, these motion functions cache the
5653 results of their scans, and consult the cache to avoid rescanning
5654 regions of the buffer until the text is modified. The caches are most
5655 beneficial when they prevent the most searching---that is, when the
5656 buffer contains long lines and large regions of characters with the
5657 same, fixed screen width.
5659 When cache-long-line-scans is non-nil, processing short lines will
5660 become slightly slower (because of the overhead of consulting the
5661 cache), and the caches will use memory roughly proportional to the
5662 number of newlines and characters whose screen width varies.
5664 The caches require no explicit maintenance; their accuracy is
5665 maintained internally by the Emacs primitives. Enabling or disabling
5666 the cache should not affect the behavior of any of the motion
5667 functions; it should only affect their performance. */);
5669 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5670 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5672 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5673 doc
: /* List of formats to use when saving this buffer.
5674 Formats are defined by `format-alist'. This variable is
5675 set when a file is visited. Automatically local in all buffers. */);
5677 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5678 ¤t_buffer
->invisibility_spec
, Qnil
,
5679 doc
: /* Invisibility spec of this buffer.
5680 The default is t, which means that text is invisible
5681 if it has a non-nil `invisible' property.
5682 If the value is a list, a text character is invisible if its `invisible'
5683 property is an element in that list.
5684 If an element is a cons cell of the form (PROP . ELLIPSIS),
5685 then characters with property value PROP are invisible,
5686 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5688 DEFVAR_PER_BUFFER ("buffer-display-count",
5689 ¤t_buffer
->display_count
, Qnil
,
5690 doc
: /* A number incremented each time this buffer is displayed in a window.
5691 The function `set-window-buffer' increments it. */);
5693 DEFVAR_PER_BUFFER ("buffer-display-time",
5694 ¤t_buffer
->display_time
, Qnil
,
5695 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5696 The function `set-window-buffer' updates this variable
5697 to the value obtained by calling `current-time'.
5698 If the buffer has never been shown in a window, the value is nil. */);
5700 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5701 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5702 Non-nil also enables highlighting of the region whenever the mark is active.
5703 The variable `highlight-nonselected-windows' controls whether to highlight
5704 all windows or just the selected window. */);
5705 Vtransient_mark_mode
= Qnil
;
5707 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5708 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5709 If the value is t, disregard `buffer-read-only' and all `read-only'
5710 text properties. If the value is a list, disregard `buffer-read-only'
5711 and disregard a `read-only' text property if the property value
5712 is a member of the list. */);
5713 Vinhibit_read_only
= Qnil
;
5715 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5716 doc
: /* Cursor to use when this buffer is in the selected window.
5717 Values are interpreted as follows:
5719 t use the cursor specified for the frame
5720 nil don't display a cursor
5721 bar display a bar cursor with default width
5722 (bar . WIDTH) display a bar cursor with width WIDTH
5723 ANYTHING ELSE display a box cursor.
5725 When the buffer is displayed in a nonselected window,
5726 this variable has no effect; the cursor appears as a hollow box. */);
5728 DEFVAR_PER_BUFFER ("line-spacing",
5729 ¤t_buffer
->extra_line_spacing
, Qnil
,
5730 doc
: /* Additional space to put between lines when displaying a buffer.
5731 The space is measured in pixels, and put below lines on window systems. */);
5733 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5734 doc
: /* List of functions called with no args to query before killing a buffer. */);
5735 Vkill_buffer_query_functions
= Qnil
;
5737 defsubr (&Sbuffer_live_p
);
5738 defsubr (&Sbuffer_list
);
5739 defsubr (&Sget_buffer
);
5740 defsubr (&Sget_file_buffer
);
5741 defsubr (&Sget_buffer_create
);
5742 defsubr (&Smake_indirect_buffer
);
5743 defsubr (&Sgenerate_new_buffer_name
);
5744 defsubr (&Sbuffer_name
);
5745 /*defsubr (&Sbuffer_number);*/
5746 defsubr (&Sbuffer_file_name
);
5747 defsubr (&Sbuffer_base_buffer
);
5748 defsubr (&Sbuffer_local_value
);
5749 defsubr (&Sbuffer_local_variables
);
5750 defsubr (&Sbuffer_modified_p
);
5751 defsubr (&Sset_buffer_modified_p
);
5752 defsubr (&Sbuffer_modified_tick
);
5753 defsubr (&Srename_buffer
);
5754 defsubr (&Sother_buffer
);
5755 defsubr (&Sbuffer_disable_undo
);
5756 defsubr (&Sbuffer_enable_undo
);
5757 defsubr (&Skill_buffer
);
5758 defsubr (&Sset_buffer_major_mode
);
5759 defsubr (&Sswitch_to_buffer
);
5760 defsubr (&Spop_to_buffer
);
5761 defsubr (&Scurrent_buffer
);
5762 defsubr (&Sset_buffer
);
5763 defsubr (&Sbarf_if_buffer_read_only
);
5764 defsubr (&Sbury_buffer
);
5765 defsubr (&Serase_buffer
);
5766 defsubr (&Sset_buffer_multibyte
);
5767 defsubr (&Skill_all_local_variables
);
5769 defsubr (&Soverlayp
);
5770 defsubr (&Smake_overlay
);
5771 defsubr (&Sdelete_overlay
);
5772 defsubr (&Smove_overlay
);
5773 defsubr (&Soverlay_start
);
5774 defsubr (&Soverlay_end
);
5775 defsubr (&Soverlay_buffer
);
5776 defsubr (&Soverlay_properties
);
5777 defsubr (&Soverlays_at
);
5778 defsubr (&Soverlays_in
);
5779 defsubr (&Snext_overlay_change
);
5780 defsubr (&Sprevious_overlay_change
);
5781 defsubr (&Soverlay_recenter
);
5782 defsubr (&Soverlay_lists
);
5783 defsubr (&Soverlay_get
);
5784 defsubr (&Soverlay_put
);
5785 defsubr (&Srestore_buffer_modified_p
);
5791 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
5792 initial_define_key (control_x_map
, 'k', "kill-buffer");
5794 /* This must not be in syms_of_buffer, because Qdisabled is not
5795 initialized when that function gets called. */
5796 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);