Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
ac869cf7 | 2 | Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000 |
c922bc55 | 3 | Free Software Foundation, Inc. |
1ab256cb RM |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
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 | |
c922bc55 | 9 | the Free Software Foundation; either version 2, or (at your option) |
1ab256cb RM |
10 | any later version. |
11 | ||
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. | |
16 | ||
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 | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
1ab256cb | 21 | |
68c45bf0 | 22 | #include <config.h> |
1ab256cb | 23 | |
2381d133 JB |
24 | #include <sys/types.h> |
25 | #include <sys/stat.h> | |
1ab256cb | 26 | #include <sys/param.h> |
9dde47f5 | 27 | #include <errno.h> |
15e7873a | 28 | #include <stdio.h> |
9dde47f5 | 29 | |
2538fae4 | 30 | #ifndef USE_CRT_DLL |
9dde47f5 | 31 | extern int errno; |
2538fae4 | 32 | #endif |
1ab256cb RM |
33 | |
34 | #ifndef MAXPATHLEN | |
35 | /* in 4.1, param.h fails to define this. */ | |
36 | #define MAXPATHLEN 1024 | |
37 | #endif /* not MAXPATHLEN */ | |
38 | ||
dfcf069d AS |
39 | #ifdef HAVE_UNISTD_H |
40 | #include <unistd.h> | |
41 | #endif | |
1ab256cb | 42 | #include "lisp.h" |
21cf4cf8 | 43 | #include "intervals.h" |
1ab256cb RM |
44 | #include "window.h" |
45 | #include "commands.h" | |
46 | #include "buffer.h" | |
3b06f880 | 47 | #include "charset.h" |
28e969dd | 48 | #include "region-cache.h" |
1ab256cb | 49 | #include "indent.h" |
d014bf88 | 50 | #include "blockinput.h" |
2538fae4 | 51 | #include "keyboard.h" |
08460cd4 | 52 | #include "frame.h" |
1ab256cb RM |
53 | |
54 | struct buffer *current_buffer; /* the current buffer */ | |
55 | ||
56 | /* First buffer in chain of all buffers (in reverse order of creation). | |
57 | Threaded through ->next. */ | |
58 | ||
59 | struct buffer *all_buffers; | |
60 | ||
61 | /* This structure holds the default values of the buffer-local variables | |
62 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
63 | The default value occupies the same slot in this structure | |
64 | as an individual buffer's value occupies in that buffer. | |
65 | Setting the default value also goes through the alist of buffers | |
66 | and stores into each buffer that does not say it has a local value. */ | |
67 | ||
68 | struct buffer buffer_defaults; | |
69 | ||
70 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
71 | ||
72 | static Lisp_Object Vbuffer_defaults; | |
73 | ||
74 | /* This structure marks which slots in a buffer have corresponding | |
75 | default values in buffer_defaults. | |
76 | Each such slot has a nonzero value in this structure. | |
77 | The value has only one nonzero bit. | |
78 | ||
79 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
80 | the entry for that slot (found in the same slot in this structure) |
81 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
82 | |
83 | If a slot in this structure is -1, then even though there may | |
84 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
85 | and the corresponding slot in buffer_defaults is not used. | |
86 | ||
87 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
88 | but there is a default value which is copied into each buffer. | |
89 | ||
90 | If a slot in this structure is negative, then even though there may | |
91 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
92 | and the corresponding slot in buffer_defaults is not used. | |
93 | ||
94 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is | |
95 | zero, that is a bug */ | |
96 | ||
97 | struct buffer buffer_local_flags; | |
98 | ||
99 | /* This structure holds the names of symbols whose values may be | |
100 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
101 | ||
102 | struct buffer buffer_local_symbols; | |
103 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
104 | static Lisp_Object Vbuffer_local_symbols; | |
105 | ||
0fa3ba92 JB |
106 | /* This structure holds the required types for the values in the |
107 | buffer-local slots. If a slot contains Qnil, then the | |
108 | corresponding buffer slot may contain a value of any type. If a | |
109 | slot contains an integer, then prospective values' tags must be | |
1bf08baf KH |
110 | equal to that integer (except nil is always allowed). |
111 | When a tag does not match, the function | |
112 | buffer_slot_type_mismatch will signal an error. | |
113 | ||
114 | If a slot here contains -1, the corresponding variable is read-only. */ | |
0fa3ba92 JB |
115 | struct buffer buffer_local_types; |
116 | ||
13de9290 RS |
117 | /* Flags indicating which built-in buffer-local variables |
118 | are permanent locals. */ | |
7313acd0 | 119 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
120 | |
121 | /* Number of per-buffer variables used. */ | |
122 | ||
7313acd0 | 123 | int last_per_buffer_idx; |
13de9290 | 124 | |
1ab256cb | 125 | Lisp_Object Fset_buffer (); |
01050cb5 | 126 | void set_buffer_internal (); |
c7aa5005 | 127 | void set_buffer_internal_1 (); |
173f2a64 | 128 | static void call_overlay_mod_hooks (); |
2f3f993b | 129 | static void swap_out_buffer_local_variables (); |
13de9290 | 130 | static void reset_buffer_local_variables (); |
1ab256cb RM |
131 | |
132 | /* Alist of all buffer names vs the buffers. */ | |
133 | /* This used to be a variable, but is no longer, | |
134 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
135 | Lisp_Object Vbuffer_alist; | |
136 | ||
137 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
138 | Lisp_Object Vbefore_change_functions; |
139 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 140 | |
c48f61ef RS |
141 | Lisp_Object Vtransient_mark_mode; |
142 | ||
a96b68f1 RS |
143 | /* t means ignore all read-only text properties. |
144 | A list means ignore such a property if its value is a member of the list. | |
145 | Any non-nil value means ignore buffer-read-only. */ | |
146 | Lisp_Object Vinhibit_read_only; | |
147 | ||
dcdffbf6 RS |
148 | /* List of functions to call that can query about killing a buffer. |
149 | If any of these functions returns nil, we don't kill it. */ | |
150 | Lisp_Object Vkill_buffer_query_functions; | |
151 | ||
dbc4e1c1 JB |
152 | /* List of functions to call before changing an unmodified buffer. */ |
153 | Lisp_Object Vfirst_change_hook; | |
22378665 | 154 | |
dbc4e1c1 | 155 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
156 | Lisp_Object Qbefore_change_functions; |
157 | Lisp_Object Qafter_change_functions; | |
1ab256cb | 158 | |
7775635d KH |
159 | /* If nonzero, all modification hooks are suppressed. */ |
160 | int inhibit_modification_hooks; | |
161 | ||
1ab256cb RM |
162 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
163 | ||
164 | Lisp_Object Qprotected_field; | |
165 | ||
166 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
167 | ||
168 | Lisp_Object Qkill_buffer_hook; | |
169 | ||
5fe0b67e RS |
170 | Lisp_Object Qget_file_buffer; |
171 | ||
52f8ec73 JB |
172 | Lisp_Object Qoverlayp; |
173 | ||
bbbe9545 | 174 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 175 | |
294d215f RS |
176 | Lisp_Object Qmodification_hooks; |
177 | Lisp_Object Qinsert_in_front_hooks; | |
178 | Lisp_Object Qinsert_behind_hooks; | |
179 | ||
b86af064 GM |
180 | static void alloc_buffer_text P_ ((struct buffer *, size_t)); |
181 | static void free_buffer_text P_ ((struct buffer *b)); | |
182 | ||
183 | ||
1ab256cb RM |
184 | /* For debugging; temporary. See set_buffer_internal. */ |
185 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
186 | ||
01136e9b | 187 | void |
1ab256cb RM |
188 | nsberror (spec) |
189 | Lisp_Object spec; | |
190 | { | |
a7a60ce9 | 191 | if (STRINGP (spec)) |
1ab256cb RM |
192 | error ("No buffer named %s", XSTRING (spec)->data); |
193 | error ("Invalid buffer argument"); | |
194 | } | |
195 | \f | |
0dc88e60 RS |
196 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
197 | "Return non-nil if OBJECT is a buffer which has not been killed.\n\ | |
198 | Value is nil if OBJECT is not a buffer or if it has been killed.") | |
199 | (object) | |
200 | Lisp_Object object; | |
201 | { | |
202 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
203 | ? Qt : Qnil); | |
204 | } | |
205 | ||
08460cd4 RS |
206 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
207 | "Return a list of all existing live buffers.\n\ | |
208 | If the optional arg FRAME is a frame, we return that frame's buffer list.") | |
209 | (frame) | |
210 | Lisp_Object frame; | |
1ab256cb | 211 | { |
08460cd4 RS |
212 | Lisp_Object framelist, general; |
213 | general = Fmapcar (Qcdr, Vbuffer_alist); | |
214 | ||
215 | if (FRAMEP (frame)) | |
216 | { | |
217 | Lisp_Object tail; | |
218 | ||
219 | CHECK_FRAME (frame, 1); | |
220 | ||
221 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
222 | ||
223 | /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */ | |
224 | tail = framelist; | |
225 | while (! NILP (tail)) | |
226 | { | |
7539e11f KR |
227 | general = Fdelq (XCAR (tail), general); |
228 | tail = XCDR (tail); | |
08460cd4 RS |
229 | } |
230 | return nconc2 (framelist, general); | |
231 | } | |
232 | ||
233 | return general; | |
1ab256cb RM |
234 | } |
235 | ||
04ae1b48 RS |
236 | /* Like Fassoc, but use Fstring_equal to compare |
237 | (which ignores text properties), | |
238 | and don't ever QUIT. */ | |
239 | ||
240 | static Lisp_Object | |
241 | assoc_ignore_text_properties (key, list) | |
242 | register Lisp_Object key; | |
243 | Lisp_Object list; | |
244 | { | |
245 | register Lisp_Object tail; | |
246 | for (tail = list; !NILP (tail); tail = Fcdr (tail)) | |
247 | { | |
248 | register Lisp_Object elt, tem; | |
249 | elt = Fcar (tail); | |
250 | tem = Fstring_equal (Fcar (elt), key); | |
251 | if (!NILP (tem)) | |
252 | return elt; | |
253 | } | |
254 | return Qnil; | |
255 | } | |
256 | ||
1ab256cb RM |
257 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
258 | "Return the buffer named NAME (a string).\n\ | |
259 | If there is no live buffer named NAME, return nil.\n\ | |
260 | NAME may also be a buffer; if so, the value is that buffer.") | |
261 | (name) | |
262 | register Lisp_Object name; | |
263 | { | |
a7a60ce9 | 264 | if (BUFFERP (name)) |
1ab256cb RM |
265 | return name; |
266 | CHECK_STRING (name, 0); | |
267 | ||
04ae1b48 | 268 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
269 | } |
270 | ||
271 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
272 | "Return the buffer visiting file FILENAME (a string).\n\ | |
92194d02 | 273 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\ |
11da5363 RS |
274 | If there is no such live buffer, return nil.\n\ |
275 | See also `find-buffer-visiting'.") | |
1ab256cb RM |
276 | (filename) |
277 | register Lisp_Object filename; | |
278 | { | |
279 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
280 | Lisp_Object handler; |
281 | ||
1ab256cb RM |
282 | CHECK_STRING (filename, 0); |
283 | filename = Fexpand_file_name (filename, Qnil); | |
284 | ||
5fe0b67e RS |
285 | /* If the file name has special constructs in it, |
286 | call the corresponding file handler. */ | |
a617e913 | 287 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
288 | if (!NILP (handler)) |
289 | return call2 (handler, Qget_file_buffer, filename); | |
290 | ||
7539e11f | 291 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 292 | { |
7539e11f | 293 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
294 | if (!BUFFERP (buf)) continue; |
295 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 296 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 297 | if (!NILP (tem)) |
1ab256cb RM |
298 | return buf; |
299 | } | |
300 | return Qnil; | |
301 | } | |
302 | ||
52e01189 RS |
303 | Lisp_Object |
304 | get_truename_buffer (filename) | |
305 | register Lisp_Object filename; | |
306 | { | |
307 | register Lisp_Object tail, buf, tem; | |
308 | ||
7539e11f | 309 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 310 | { |
7539e11f | 311 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
312 | if (!BUFFERP (buf)) continue; |
313 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
314 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
315 | if (!NILP (tem)) | |
316 | return buf; | |
317 | } | |
318 | return Qnil; | |
319 | } | |
320 | ||
1ab256cb RM |
321 | /* Incremented for each buffer created, to assign the buffer number. */ |
322 | int buffer_count; | |
323 | ||
324 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
325 | "Return the buffer named NAME, or create such a buffer and return it.\n\ | |
326 | A new buffer is created if there is no live buffer named NAME.\n\ | |
b44895bc | 327 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
1ab256cb RM |
328 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
329 | The value is never nil.") | |
330 | (name) | |
331 | register Lisp_Object name; | |
332 | { | |
a9ee7a59 | 333 | register Lisp_Object buf; |
1ab256cb RM |
334 | register struct buffer *b; |
335 | ||
336 | buf = Fget_buffer (name); | |
265a9e55 | 337 | if (!NILP (buf)) |
1ab256cb RM |
338 | return buf; |
339 | ||
31cd83e9 KH |
340 | if (XSTRING (name)->size == 0) |
341 | error ("Empty string for buffer name is not allowed"); | |
342 | ||
a21260d9 | 343 | b = (struct buffer *) allocate_buffer (); |
1ab256cb | 344 | |
336cd056 RS |
345 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
346 | ||
347 | /* An ordinary buffer uses its own struct buffer_text. */ | |
348 | b->text = &b->own_text; | |
349 | b->base_buffer = 0; | |
350 | ||
1ab256cb | 351 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 352 | BLOCK_INPUT; |
3b06f880 KH |
353 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
354 | anchoring a search. */ | |
b86af064 | 355 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 356 | UNBLOCK_INPUT; |
1ab256cb | 357 | if (! BUF_BEG_ADDR (b)) |
81841847 | 358 | buffer_memory_full (); |
1ab256cb RM |
359 | |
360 | BUF_PT (b) = 1; | |
361 | BUF_GPT (b) = 1; | |
362 | BUF_BEGV (b) = 1; | |
363 | BUF_ZV (b) = 1; | |
364 | BUF_Z (b) = 1; | |
3f236a40 RS |
365 | BUF_PT_BYTE (b) = 1; |
366 | BUF_GPT_BYTE (b) = 1; | |
367 | BUF_BEGV_BYTE (b) = 1; | |
368 | BUF_ZV_BYTE (b) = 1; | |
369 | BUF_Z_BYTE (b) = 1; | |
1ab256cb | 370 | BUF_MODIFF (b) = 1; |
2509d356 | 371 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
372 | BUF_SAVE_MODIFF (b) = 1; |
373 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
374 | BUF_UNCHANGED_MODIFIED (b) = 1; |
375 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
376 | BUF_END_UNCHANGED (b) = 0; | |
377 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 378 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 379 | |
28e969dd JB |
380 | b->newline_cache = 0; |
381 | b->width_run_cache = 0; | |
382 | b->width_table = Qnil; | |
b5a225b4 | 383 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 384 | |
1ab256cb RM |
385 | /* Put this on the chain of all buffers including killed ones. */ |
386 | b->next = all_buffers; | |
387 | all_buffers = b; | |
388 | ||
336cd056 RS |
389 | /* An ordinary buffer normally doesn't need markers |
390 | to handle BEGV and ZV. */ | |
391 | b->pt_marker = Qnil; | |
392 | b->begv_marker = Qnil; | |
393 | b->zv_marker = Qnil; | |
04ae1b48 RS |
394 | |
395 | name = Fcopy_sequence (name); | |
a9800ae8 | 396 | XSTRING (name)->intervals = NULL_INTERVAL; |
1ab256cb | 397 | b->name = name; |
04ae1b48 | 398 | |
1ab256cb RM |
399 | if (XSTRING (name)->data[0] != ' ') |
400 | b->undo_list = Qnil; | |
401 | else | |
402 | b->undo_list = Qt; | |
403 | ||
404 | reset_buffer (b); | |
13de9290 | 405 | reset_buffer_local_variables (b, 1); |
1ab256cb RM |
406 | |
407 | /* Put this in the alist of all live buffers. */ | |
67180c6a | 408 | XSETBUFFER (buf, b); |
1ab256cb RM |
409 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
410 | ||
411 | b->mark = Fmake_marker (); | |
336cd056 RS |
412 | BUF_MARKERS (b) = Qnil; |
413 | b->name = name; | |
414 | return buf; | |
415 | } | |
416 | ||
7e9d5818 GM |
417 | |
418 | /* Clone per-buffer values of buffer FROM. | |
419 | ||
420 | Buffer TO gets the same per-buffer values as FROM, with the | |
421 | following exceptions: (1) TO's name is left untouched, (2) markers | |
422 | are copied and made to refer to TO, and (3) overlay lists are | |
423 | copied. */ | |
424 | ||
425 | static void | |
426 | clone_per_buffer_values (from, to) | |
427 | struct buffer *from, *to; | |
428 | { | |
429 | Lisp_Object to_buffer; | |
430 | int offset; | |
431 | ||
432 | XSETBUFFER (to_buffer, to); | |
433 | ||
434 | for (offset = PER_BUFFER_VAR_OFFSET (name) + sizeof (Lisp_Object); | |
435 | offset < sizeof *to; | |
436 | offset += sizeof (Lisp_Object)) | |
437 | { | |
438 | Lisp_Object obj; | |
439 | ||
440 | obj = PER_BUFFER_VALUE (from, offset); | |
441 | if (MARKERP (obj)) | |
442 | { | |
443 | struct Lisp_Marker *m = XMARKER (obj); | |
444 | obj = Fmake_marker (); | |
445 | XMARKER (obj)->insertion_type = m->insertion_type; | |
446 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
447 | } | |
448 | ||
449 | PER_BUFFER_VALUE (to, offset) = obj; | |
450 | } | |
451 | ||
452 | to->overlays_after = Fcopy_sequence (from->overlays_after); | |
453 | to->overlays_before = Fcopy_sequence (to->overlays_before); | |
454 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); | |
455 | } | |
456 | ||
457 | ||
458 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, | |
459 | 2, 3, | |
193c3837 | 460 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
a2428fa2 EN |
461 | "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\ |
462 | BASE-BUFFER should be an existing buffer (or buffer name).\n\ | |
7e9d5818 GM |
463 | NAME should be a string which is not the name of an existing buffer.\n\ |
464 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state,\n\ | |
f532dca0 | 465 | such as major and minor modes, in the indirect buffer.\n\ |
7e9d5818 GM |
466 | CLONE nil means the indirect buffer's state is reset to default values.") |
467 | (base_buffer, name, clone) | |
468 | Lisp_Object base_buffer, name, clone; | |
336cd056 | 469 | { |
7e9d5818 GM |
470 | Lisp_Object buf; |
471 | struct buffer *b; | |
336cd056 RS |
472 | |
473 | buf = Fget_buffer (name); | |
474 | if (!NILP (buf)) | |
475 | error ("Buffer name `%s' is in use", XSTRING (name)->data); | |
476 | ||
477 | base_buffer = Fget_buffer (base_buffer); | |
478 | if (NILP (base_buffer)) | |
479 | error ("No such buffer: `%s'", | |
480 | XSTRING (XBUFFER (base_buffer)->name)->data); | |
481 | ||
482 | if (XSTRING (name)->size == 0) | |
483 | error ("Empty string for buffer name is not allowed"); | |
484 | ||
a21260d9 | 485 | b = (struct buffer *) allocate_buffer (); |
336cd056 RS |
486 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
487 | ||
488 | if (XBUFFER (base_buffer)->base_buffer) | |
489 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
490 | else | |
491 | b->base_buffer = XBUFFER (base_buffer); | |
492 | ||
493 | /* Use the base buffer's text object. */ | |
494 | b->text = b->base_buffer->text; | |
495 | ||
496 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
497 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
498 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
499 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
500 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
501 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
502 | |
503 | b->newline_cache = 0; | |
504 | b->width_run_cache = 0; | |
505 | b->width_table = Qnil; | |
506 | ||
507 | /* Put this on the chain of all buffers including killed ones. */ | |
508 | b->next = all_buffers; | |
509 | all_buffers = b; | |
510 | ||
511 | name = Fcopy_sequence (name); | |
a9800ae8 | 512 | XSTRING (name)->intervals = NULL_INTERVAL; |
336cd056 RS |
513 | b->name = name; |
514 | ||
515 | reset_buffer (b); | |
13de9290 | 516 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
517 | |
518 | /* Put this in the alist of all live buffers. */ | |
519 | XSETBUFFER (buf, b); | |
520 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
521 | ||
522 | b->mark = Fmake_marker (); | |
1ab256cb | 523 | b->name = name; |
336cd056 | 524 | |
abc9d959 RS |
525 | /* The multibyte status belongs to the base buffer. */ |
526 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
527 | ||
336cd056 RS |
528 | /* Make sure the base buffer has markers for its narrowing. */ |
529 | if (NILP (b->base_buffer->pt_marker)) | |
530 | { | |
531 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
532 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
533 | BUF_PT (b->base_buffer), | |
534 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
535 | } |
536 | if (NILP (b->base_buffer->begv_marker)) | |
537 | { | |
538 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
539 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
540 | BUF_BEGV (b->base_buffer), | |
541 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
542 | } |
543 | if (NILP (b->base_buffer->zv_marker)) | |
544 | { | |
545 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
546 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
547 | BUF_ZV (b->base_buffer), | |
548 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 549 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
550 | } |
551 | ||
7e9d5818 GM |
552 | if (NILP (clone)) |
553 | { | |
554 | /* Give the indirect buffer markers for its narrowing. */ | |
555 | b->pt_marker = Fmake_marker (); | |
556 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
557 | b->begv_marker = Fmake_marker (); | |
558 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
559 | b->zv_marker = Fmake_marker (); | |
560 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
561 | XMARKER (b->zv_marker)->insertion_type = 1; | |
562 | } | |
563 | else | |
564 | clone_per_buffer_values (b->base_buffer, b); | |
336cd056 | 565 | |
a9ee7a59 | 566 | return buf; |
1ab256cb RM |
567 | } |
568 | ||
bcd40520 RS |
569 | /* Reinitialize everything about a buffer except its name and contents |
570 | and local variables. */ | |
1ab256cb RM |
571 | |
572 | void | |
573 | reset_buffer (b) | |
574 | register struct buffer *b; | |
575 | { | |
576 | b->filename = Qnil; | |
f6ed2e84 | 577 | b->file_truename = Qnil; |
1ab256cb RM |
578 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
579 | b->modtime = 0; | |
8d7a4592 | 580 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 581 | b->last_window_start = 1; |
8b264726 | 582 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
583 | b->clip_changed = 0; |
584 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
585 | b->backed_up = Qnil; |
586 | b->auto_save_modified = 0; | |
84f6bcba | 587 | b->auto_save_failure_time = -1; |
1ab256cb RM |
588 | b->auto_save_file_name = Qnil; |
589 | b->read_only = Qnil; | |
2eec3b4e RS |
590 | b->overlays_before = Qnil; |
591 | b->overlays_after = Qnil; | |
8d7a4592 | 592 | XSETFASTINT (b->overlay_center, 1); |
dfda7a7f | 593 | b->mark_active = Qnil; |
943e065b | 594 | b->point_before_scroll = Qnil; |
be9aafdd | 595 | b->file_format = Qnil; |
0dc6f165 | 596 | b->last_selected_window = Qnil; |
7962a441 | 597 | XSETINT (b->display_count, 0); |
3fd364db | 598 | b->display_time = Qnil; |
1bf08baf | 599 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 600 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 601 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
1ab256cb RM |
602 | } |
603 | ||
bcd40520 RS |
604 | /* Reset buffer B's local variables info. |
605 | Don't use this on a buffer that has already been in use; | |
606 | it does not treat permanent locals consistently. | |
13de9290 RS |
607 | Instead, use Fkill_all_local_variables. |
608 | ||
609 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
610 | buffer-local variables. If PERMANENT_TOO is 0, | |
611 | we preserve those. */ | |
bcd40520 | 612 | |
13de9290 RS |
613 | static void |
614 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 615 | register struct buffer *b; |
13de9290 | 616 | int permanent_too; |
1ab256cb RM |
617 | { |
618 | register int offset; | |
7c02e886 | 619 | int i; |
1ab256cb RM |
620 | |
621 | /* Reset the major mode to Fundamental, together with all the | |
622 | things that depend on the major mode. | |
623 | default-major-mode is handled at a higher level. | |
624 | We ignore it here. */ | |
625 | b->major_mode = Qfundamental_mode; | |
626 | b->keymap = Qnil; | |
627 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
628 | b->mode_name = QSFundamental; | |
629 | b->minor_modes = Qnil; | |
3446af9c RS |
630 | |
631 | /* If the standard case table has been altered and invalidated, | |
632 | fix up its insides first. */ | |
633 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
634 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
635 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
636 | Fset_standard_case_table (Vascii_downcase_table); | |
637 | ||
1ab256cb | 638 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
639 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
640 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
641 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 642 | b->invisibility_spec = Qt; |
2e716096 RS |
643 | #ifndef DOS_NT |
644 | b->buffer_file_type = Qnil; | |
645 | #endif | |
3cb719bd | 646 | |
1ab256cb RM |
647 | #if 0 |
648 | b->sort_table = XSTRING (Vascii_sort_table); | |
649 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
650 | #endif /* 0 */ | |
651 | ||
13de9290 | 652 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 653 | b->local_var_alist = Qnil; |
7313acd0 | 654 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 655 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 656 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
657 | |
658 | /* For each slot that has a default value, | |
659 | copy that into the slot. */ | |
660 | ||
7313acd0 | 661 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
7c02e886 GM |
662 | offset < sizeof *b; |
663 | offset += sizeof (Lisp_Object)) | |
aab80822 | 664 | { |
7313acd0 | 665 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
666 | if ((idx > 0 |
667 | && (permanent_too | |
668 | || buffer_permanent_local_flags[idx] == 0)) | |
669 | /* Is -2 used anywhere? */ | |
670 | || idx == -2) | |
7313acd0 | 671 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 672 | } |
1ab256cb RM |
673 | } |
674 | ||
01050cb5 RM |
675 | /* We split this away from generate-new-buffer, because rename-buffer |
676 | and set-visited-file-name ought to be able to use this to really | |
677 | rename the buffer properly. */ | |
678 | ||
679 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 680 | 1, 2, 0, |
01050cb5 RM |
681 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
682 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 683 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 684 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 685 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 686 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 687 | even if a buffer with that name exists.") |
c273e647 RS |
688 | (name, ignore) |
689 | register Lisp_Object name, ignore; | |
1ab256cb RM |
690 | { |
691 | register Lisp_Object gentemp, tem; | |
692 | int count; | |
693 | char number[10]; | |
694 | ||
695 | CHECK_STRING (name, 0); | |
696 | ||
697 | tem = Fget_buffer (name); | |
265a9e55 | 698 | if (NILP (tem)) |
01050cb5 | 699 | return name; |
1ab256cb RM |
700 | |
701 | count = 1; | |
702 | while (1) | |
703 | { | |
704 | sprintf (number, "<%d>", ++count); | |
705 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 706 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
707 | if (!NILP (tem)) |
708 | return gentemp; | |
1ab256cb | 709 | tem = Fget_buffer (gentemp); |
265a9e55 | 710 | if (NILP (tem)) |
01050cb5 | 711 | return gentemp; |
1ab256cb RM |
712 | } |
713 | } | |
714 | ||
715 | \f | |
716 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
717 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 718 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
719 | (buffer) |
720 | register Lisp_Object buffer; | |
721 | { | |
265a9e55 | 722 | if (NILP (buffer)) |
1ab256cb RM |
723 | return current_buffer->name; |
724 | CHECK_BUFFER (buffer, 0); | |
725 | return XBUFFER (buffer)->name; | |
726 | } | |
727 | ||
728 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
729 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
730 | No argument or nil as argument means use the current buffer.") | |
731 | (buffer) | |
732 | register Lisp_Object buffer; | |
733 | { | |
265a9e55 | 734 | if (NILP (buffer)) |
1ab256cb RM |
735 | return current_buffer->filename; |
736 | CHECK_BUFFER (buffer, 0); | |
737 | return XBUFFER (buffer)->filename; | |
738 | } | |
739 | ||
336cd056 RS |
740 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
741 | 0, 1, 0, | |
742 | "Return the base buffer of indirect buffer BUFFER.\n\ | |
743 | If BUFFER is not indirect, return nil.") | |
744 | (buffer) | |
745 | register Lisp_Object buffer; | |
746 | { | |
747 | struct buffer *base; | |
748 | Lisp_Object base_buffer; | |
749 | ||
750 | if (NILP (buffer)) | |
751 | base = current_buffer->base_buffer; | |
752 | else | |
753 | { | |
754 | CHECK_BUFFER (buffer, 0); | |
755 | base = XBUFFER (buffer)->base_buffer; | |
756 | } | |
757 | ||
758 | if (! base) | |
759 | return Qnil; | |
760 | XSETBUFFER (base_buffer, base); | |
761 | return base_buffer; | |
762 | } | |
763 | ||
1ab256cb RM |
764 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
765 | Sbuffer_local_variables, 0, 1, 0, | |
766 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
767 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
768 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
769 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
770 | No argument or nil as argument means use current buffer as BUFFER.") | |
771 | (buffer) | |
772 | register Lisp_Object buffer; | |
773 | { | |
774 | register struct buffer *buf; | |
553defa4 | 775 | register Lisp_Object result; |
1ab256cb | 776 | |
265a9e55 | 777 | if (NILP (buffer)) |
1ab256cb RM |
778 | buf = current_buffer; |
779 | else | |
780 | { | |
781 | CHECK_BUFFER (buffer, 0); | |
782 | buf = XBUFFER (buffer); | |
783 | } | |
784 | ||
553defa4 RS |
785 | result = Qnil; |
786 | ||
1ab256cb | 787 | { |
553defa4 | 788 | register Lisp_Object tail; |
7539e11f | 789 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 790 | { |
553defa4 RS |
791 | Lisp_Object val, elt; |
792 | ||
7539e11f | 793 | elt = XCAR (tail); |
553defa4 | 794 | |
e0585c64 RS |
795 | /* Reference each variable in the alist in buf. |
796 | If inquiring about the current buffer, this gets the current values, | |
797 | so store them into the alist so the alist is up to date. | |
798 | If inquiring about some other buffer, this swaps out any values | |
799 | for that buffer, making the alist up to date automatically. */ | |
7539e11f | 800 | val = find_symbol_value (XCAR (elt)); |
e0585c64 RS |
801 | /* Use the current buffer value only if buf is the current buffer. */ |
802 | if (buf != current_buffer) | |
7539e11f | 803 | val = XCDR (elt); |
553defa4 RS |
804 | |
805 | /* If symbol is unbound, put just the symbol in the list. */ | |
806 | if (EQ (val, Qunbound)) | |
7539e11f | 807 | result = Fcons (XCAR (elt), result); |
553defa4 RS |
808 | /* Otherwise, put (symbol . value) in the list. */ |
809 | else | |
7539e11f | 810 | result = Fcons (Fcons (XCAR (elt), val), result); |
1ab256cb RM |
811 | } |
812 | } | |
813 | ||
1ab256cb RM |
814 | /* Add on all the variables stored in special slots. */ |
815 | { | |
7c02e886 | 816 | int offset, idx; |
1ab256cb | 817 | |
7313acd0 | 818 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
1ab256cb | 819 | offset < sizeof (struct buffer); |
7c02e886 GM |
820 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
821 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 822 | { |
7313acd0 GM |
823 | idx = PER_BUFFER_IDX (offset); |
824 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
825 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
826 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
827 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 828 | result); |
1ab256cb RM |
829 | } |
830 | } | |
553defa4 RS |
831 | |
832 | return result; | |
1ab256cb RM |
833 | } |
834 | ||
835 | \f | |
836 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
837 | 0, 1, 0, | |
838 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
839 | No argument or nil as argument means use current buffer as BUFFER.") | |
840 | (buffer) | |
841 | register Lisp_Object buffer; | |
842 | { | |
843 | register struct buffer *buf; | |
265a9e55 | 844 | if (NILP (buffer)) |
1ab256cb RM |
845 | buf = current_buffer; |
846 | else | |
847 | { | |
848 | CHECK_BUFFER (buffer, 0); | |
849 | buf = XBUFFER (buffer); | |
850 | } | |
851 | ||
336cd056 | 852 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
853 | } |
854 | ||
855 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
856 | 1, 1, 0, | |
857 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
858 | A non-nil FLAG means mark the buffer modified.") | |
859 | (flag) | |
860 | register Lisp_Object flag; | |
861 | { | |
862 | register int already; | |
863 | register Lisp_Object fn; | |
8ec01c70 | 864 | Lisp_Object buffer, window; |
1ab256cb RM |
865 | |
866 | #ifdef CLASH_DETECTION | |
867 | /* If buffer becoming modified, lock the file. | |
868 | If buffer becoming unmodified, unlock the file. */ | |
869 | ||
60f4dd23 | 870 | fn = current_buffer->file_truename; |
90d456d2 KH |
871 | /* Test buffer-file-name so that binding it to nil is effective. */ |
872 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 873 | { |
336cd056 | 874 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 875 | if (!already && !NILP (flag)) |
1ab256cb | 876 | lock_file (fn); |
265a9e55 | 877 | else if (already && NILP (flag)) |
1ab256cb RM |
878 | unlock_file (fn); |
879 | } | |
880 | #endif /* CLASH_DETECTION */ | |
881 | ||
336cd056 | 882 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
8ec01c70 GM |
883 | |
884 | /* Set update_mode_lines only if buffer is displayed in some window. | |
885 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
886 | state by recording/restoring the state around blocks of code. | |
887 | Setting update_mode_lines makes redisplay consider all windows | |
888 | (on all frames). Stealth fontification of buffers not displayed | |
889 | would incur additional redisplay costs if we'd set | |
890 | update_modes_lines unconditionally. | |
891 | ||
892 | Ideally, I think there should be another mechanism for fontifying | |
893 | buffers without "modifying" buffers, or redisplay should be | |
894 | smarter about updating the `*' in mode lines. --gerd */ | |
895 | XSETBUFFER (buffer, current_buffer); | |
896 | window = Fget_buffer_window (buffer, Qt); | |
897 | if (WINDOWP (window)) | |
898 | update_mode_lines++; | |
899 | ||
1ab256cb RM |
900 | return flag; |
901 | } | |
902 | ||
a8c21b48 GM |
903 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
904 | Srestore_buffer_modified_p, 1, 1, 0, | |
905 | "Like `set-buffer-modified-p', with a differences concerning redisplay.\n\ | |
906 | It is not ensured that mode lines will be updated to show the modified\n\ | |
907 | state of the current buffer. Use with care.") | |
908 | (flag) | |
909 | Lisp_Object flag; | |
910 | { | |
911 | #ifdef CLASH_DETECTION | |
912 | Lisp_Object fn; | |
913 | ||
914 | /* If buffer becoming modified, lock the file. | |
915 | If buffer becoming unmodified, unlock the file. */ | |
916 | ||
917 | fn = current_buffer->file_truename; | |
918 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
919 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
920 | { | |
921 | int already = SAVE_MODIFF < MODIFF; | |
922 | if (!already && !NILP (flag)) | |
923 | lock_file (fn); | |
924 | else if (already && NILP (flag)) | |
925 | unlock_file (fn); | |
926 | } | |
927 | #endif /* CLASH_DETECTION */ | |
928 | ||
929 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; | |
930 | return flag; | |
931 | } | |
932 | ||
1ab256cb RM |
933 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
934 | 0, 1, 0, | |
935 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
936 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
937 | that buffer is changed. It wraps around occasionally.\n\ | |
938 | No argument or nil as argument means use current buffer as BUFFER.") | |
939 | (buffer) | |
940 | register Lisp_Object buffer; | |
941 | { | |
942 | register struct buffer *buf; | |
265a9e55 | 943 | if (NILP (buffer)) |
1ab256cb RM |
944 | buf = current_buffer; |
945 | else | |
946 | { | |
947 | CHECK_BUFFER (buffer, 0); | |
948 | buf = XBUFFER (buffer); | |
949 | } | |
950 | ||
951 | return make_number (BUF_MODIFF (buf)); | |
952 | } | |
953 | \f | |
01050cb5 | 954 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 955 | "sRename buffer (to new name): \nP", |
1ab256cb | 956 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 957 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 958 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 959 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 960 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
961 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
962 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 963 | This does not change the name of the visited file (if any).") |
489c043a RS |
964 | (newname, unique) |
965 | register Lisp_Object newname, unique; | |
1ab256cb RM |
966 | { |
967 | register Lisp_Object tem, buf; | |
968 | ||
489c043a | 969 | CHECK_STRING (newname, 0); |
d59698c4 | 970 | |
489c043a | 971 | if (XSTRING (newname)->size == 0) |
d59698c4 RS |
972 | error ("Empty string is invalid as a buffer name"); |
973 | ||
489c043a | 974 | tem = Fget_buffer (newname); |
265a9e55 | 975 | if (!NILP (tem)) |
01050cb5 | 976 | { |
8801a864 KR |
977 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
978 | rename the buffer automatically so you can create another | |
979 | with the original name. It makes UNIQUE equivalent to | |
980 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
981 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
982 | return current_buffer->name; | |
3bd779aa | 983 | if (!NILP (unique)) |
489c043a | 984 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 985 | else |
489c043a | 986 | error ("Buffer name `%s' is in use", XSTRING (newname)->data); |
01050cb5 | 987 | } |
1ab256cb | 988 | |
489c043a | 989 | current_buffer->name = newname; |
76f590d7 JB |
990 | |
991 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
992 | any windows displaying current_buffer will stay unchanged. */ | |
993 | update_mode_lines++; | |
994 | ||
67180c6a | 995 | XSETBUFFER (buf, current_buffer); |
489c043a | 996 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
997 | if (NILP (current_buffer->filename) |
998 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 999 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1000 | /* Refetch since that last call may have done GC. */ |
1001 | return current_buffer->name; | |
1ab256cb RM |
1002 | } |
1003 | ||
773fbdb9 | 1004 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
1ab256cb | 1005 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
1006 | Buffers not visible in windows are preferred to visible buffers,\n\ |
1007 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
97c3c30c RS |
1008 | If the optional third argument FRAME is non-nil, use that frame's\n\ |
1009 | buffer list instead of the selected frame's buffer list.\n\ | |
1ab256cb RM |
1010 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
1011 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
773fbdb9 RS |
1012 | (buffer, visible_ok, frame) |
1013 | register Lisp_Object buffer, visible_ok, frame; | |
1ab256cb | 1014 | { |
89132f25 | 1015 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1016 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1017 | notsogood = Qnil; |
1018 | ||
773fbdb9 | 1019 | if (NILP (frame)) |
9ba9623d | 1020 | frame = selected_frame; |
773fbdb9 | 1021 | |
7962a441 | 1022 | tail = Vbuffer_alist; |
773fbdb9 | 1023 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1024 | |
1025 | /* Consider buffers that have been seen in the selected frame | |
1026 | before other buffers. */ | |
1027 | ||
773fbdb9 | 1028 | tem = frame_buffer_list (frame); |
7962a441 RS |
1029 | add_ons = Qnil; |
1030 | while (CONSP (tem)) | |
1031 | { | |
7539e11f KR |
1032 | if (BUFFERP (XCAR (tem))) |
1033 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1034 | tem = XCDR (tem); | |
7962a441 RS |
1035 | } |
1036 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1037 | ||
1038 | for (; !NILP (tail); tail = Fcdr (tail)) | |
1ab256cb RM |
1039 | { |
1040 | buf = Fcdr (Fcar (tail)); | |
1041 | if (EQ (buf, buffer)) | |
1042 | continue; | |
1043 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
1044 | continue; | |
04ae1b48 RS |
1045 | /* If the selected frame has a buffer_predicate, |
1046 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1047 | if (!NILP (pred)) |
04ae1b48 | 1048 | { |
7962a441 | 1049 | tem = call1 (pred, buf); |
04ae1b48 RS |
1050 | if (NILP (tem)) |
1051 | continue; | |
1052 | } | |
04ae1b48 | 1053 | |
a0ebb746 | 1054 | if (NILP (visible_ok)) |
66ffe51c | 1055 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1056 | else |
1057 | tem = Qnil; | |
265a9e55 | 1058 | if (NILP (tem)) |
1ab256cb | 1059 | return buf; |
265a9e55 | 1060 | if (NILP (notsogood)) |
1ab256cb RM |
1061 | notsogood = buf; |
1062 | } | |
265a9e55 | 1063 | if (!NILP (notsogood)) |
1ab256cb | 1064 | return notsogood; |
dba1a30a GM |
1065 | buf = Fget_buffer (build_string ("*scratch*")); |
1066 | if (NILP (buf)) | |
1067 | { | |
1068 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1069 | Fset_buffer_major_mode (buf); | |
1070 | } | |
89132f25 | 1071 | return buf; |
1ab256cb RM |
1072 | } |
1073 | \f | |
316784fb KH |
1074 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, |
1075 | 0, 1, "", | |
5b8bcf48 RS |
1076 | "Make BUFFER stop keeping undo information.\n\ |
1077 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
1078 | (buffer) |
1079 | register Lisp_Object buffer; | |
1ab256cb | 1080 | { |
ffd56f97 JB |
1081 | Lisp_Object real_buffer; |
1082 | ||
1083 | if (NILP (buffer)) | |
67180c6a | 1084 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
1085 | else |
1086 | { | |
1087 | real_buffer = Fget_buffer (buffer); | |
1088 | if (NILP (real_buffer)) | |
1089 | nsberror (buffer); | |
1090 | } | |
1091 | ||
1092 | XBUFFER (real_buffer)->undo_list = Qt; | |
1093 | ||
1ab256cb RM |
1094 | return Qnil; |
1095 | } | |
1096 | ||
1097 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
1098 | 0, 1, "", | |
1099 | "Start keeping undo information for buffer BUFFER.\n\ | |
1100 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
1101 | (buffer) |
1102 | register Lisp_Object buffer; | |
1ab256cb | 1103 | { |
ffd56f97 | 1104 | Lisp_Object real_buffer; |
1ab256cb | 1105 | |
ffd56f97 | 1106 | if (NILP (buffer)) |
67180c6a | 1107 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1108 | else |
1109 | { | |
ffd56f97 JB |
1110 | real_buffer = Fget_buffer (buffer); |
1111 | if (NILP (real_buffer)) | |
1112 | nsberror (buffer); | |
1ab256cb RM |
1113 | } |
1114 | ||
ffd56f97 JB |
1115 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1116 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1117 | |
1118 | return Qnil; | |
1119 | } | |
1120 | ||
1121 | /* | |
1122 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1123 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1124 | The buffer being killed will be current while the hook is running.\n\ | |
1125 | See `kill-buffer'." | |
1126 | */ | |
1127 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
1128 | "Kill the buffer BUFFER.\n\ | |
1129 | The argument may be a buffer or may be the name of a buffer.\n\ | |
1130 | An argument of nil means kill the current buffer.\n\n\ | |
1131 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
1132 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
1133 | if not void, is a list of functions to be called, with no arguments,\n\ | |
1134 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
1135 | when the hook functions are called.\n\n\ | |
1136 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
b64d7442 | 1137 | with SIGHUP.") |
a25f13ae KH |
1138 | (buffer) |
1139 | Lisp_Object buffer; | |
1ab256cb RM |
1140 | { |
1141 | Lisp_Object buf; | |
1142 | register struct buffer *b; | |
1143 | register Lisp_Object tem; | |
1144 | register struct Lisp_Marker *m; | |
6af718a4 | 1145 | struct gcpro gcpro1; |
1ab256cb | 1146 | |
a25f13ae | 1147 | if (NILP (buffer)) |
1ab256cb RM |
1148 | buf = Fcurrent_buffer (); |
1149 | else | |
a25f13ae | 1150 | buf = Fget_buffer (buffer); |
265a9e55 | 1151 | if (NILP (buf)) |
a25f13ae | 1152 | nsberror (buffer); |
1ab256cb RM |
1153 | |
1154 | b = XBUFFER (buf); | |
1155 | ||
4a4a9db5 KH |
1156 | /* Avoid trouble for buffer already dead. */ |
1157 | if (NILP (b->name)) | |
1158 | return Qnil; | |
1159 | ||
1ab256cb | 1160 | /* Query if the buffer is still modified. */ |
265a9e55 | 1161 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1162 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1163 | { |
a25f13ae | 1164 | GCPRO1 (buf); |
1ab256cb RM |
1165 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", |
1166 | XSTRING (b->name)->data)); | |
1167 | UNGCPRO; | |
265a9e55 | 1168 | if (NILP (tem)) |
1ab256cb RM |
1169 | return Qnil; |
1170 | } | |
1171 | ||
dcdffbf6 | 1172 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1173 | { |
1ab256cb | 1174 | int count = specpdl_ptr - specpdl; |
dcdffbf6 | 1175 | Lisp_Object list; |
1ab256cb RM |
1176 | |
1177 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1178 | set_buffer_internal (b); | |
dcdffbf6 RS |
1179 | |
1180 | /* First run the query functions; if any query is answered no, | |
1181 | don't kill the buffer. */ | |
1182 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
1183 | { | |
1184 | tem = call0 (Fcar (list)); | |
1185 | if (NILP (tem)) | |
1186 | return unbind_to (count, Qnil); | |
1187 | } | |
1188 | ||
1189 | /* Then run the hooks. */ | |
fd186f07 RS |
1190 | if (!NILP (Vrun_hooks)) |
1191 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
1ab256cb RM |
1192 | unbind_to (count, Qnil); |
1193 | } | |
1194 | ||
1195 | /* We have no more questions to ask. Verify that it is valid | |
1196 | to kill the buffer. This must be done after the questions | |
1197 | since anything can happen within do_yes_or_no_p. */ | |
1198 | ||
1199 | /* Don't kill the minibuffer now current. */ | |
1200 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1201 | return Qnil; | |
1202 | ||
265a9e55 | 1203 | if (NILP (b->name)) |
1ab256cb RM |
1204 | return Qnil; |
1205 | ||
336cd056 RS |
1206 | /* When we kill a base buffer, kill all its indirect buffers. |
1207 | We do it at this stage so nothing terrible happens if they | |
1208 | ask questions or their hooks get errors. */ | |
1209 | if (! b->base_buffer) | |
1210 | { | |
1211 | struct buffer *other; | |
1212 | ||
1213 | GCPRO1 (buf); | |
1214 | ||
1215 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1216 | /* all_buffers contains dead buffers too; |
1217 | don't re-kill them. */ | |
1218 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1219 | { |
1220 | Lisp_Object buf; | |
1221 | XSETBUFFER (buf, other); | |
1222 | Fkill_buffer (buf); | |
1223 | } | |
1224 | ||
1225 | UNGCPRO; | |
1226 | } | |
1227 | ||
1ab256cb RM |
1228 | /* Make this buffer not be current. |
1229 | In the process, notice if this is the sole visible buffer | |
1230 | and give up if so. */ | |
1231 | if (b == current_buffer) | |
1232 | { | |
773fbdb9 | 1233 | tem = Fother_buffer (buf, Qnil, Qnil); |
1ab256cb RM |
1234 | Fset_buffer (tem); |
1235 | if (b == current_buffer) | |
1236 | return Qnil; | |
1237 | } | |
1238 | ||
1239 | /* Now there is no question: we can kill the buffer. */ | |
1240 | ||
1241 | #ifdef CLASH_DETECTION | |
1242 | /* Unlock this buffer's file, if it is locked. */ | |
1243 | unlock_buffer (b); | |
1244 | #endif /* CLASH_DETECTION */ | |
1245 | ||
1ab256cb | 1246 | kill_buffer_processes (buf); |
1ab256cb RM |
1247 | |
1248 | tem = Vinhibit_quit; | |
1249 | Vinhibit_quit = Qt; | |
00550f94 | 1250 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1251 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1252 | frames_discard_buffer (buf); |
1ab256cb RM |
1253 | Vinhibit_quit = tem; |
1254 | ||
9b59d6d0 | 1255 | /* Delete any auto-save file, if we saved it in this session. */ |
a7a60ce9 | 1256 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1257 | && b->auto_save_modified != 0 |
30e0071c | 1258 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified) |
1ab256cb RM |
1259 | { |
1260 | Lisp_Object tem; | |
1261 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1262 | if (! NILP (tem)) |
cbb6a418 | 1263 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1264 | } |
1265 | ||
4a4a9db5 KH |
1266 | if (b->base_buffer) |
1267 | { | |
1268 | /* Unchain all markers that belong to this indirect buffer. | |
1269 | Don't unchain the markers that belong to the base buffer | |
1270 | or its other indirect buffers. */ | |
1271 | for (tem = BUF_MARKERS (b); !NILP (tem); ) | |
1272 | { | |
1273 | Lisp_Object next; | |
1274 | m = XMARKER (tem); | |
1275 | next = m->chain; | |
1276 | if (m->buffer == b) | |
1277 | unchain_marker (tem); | |
1278 | tem = next; | |
1279 | } | |
1280 | } | |
1281 | else | |
1ab256cb | 1282 | { |
4a4a9db5 | 1283 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1284 | and leave them pointing nowhere. */ |
4a4a9db5 | 1285 | for (tem = BUF_MARKERS (b); !NILP (tem); ) |
336cd056 RS |
1286 | { |
1287 | m = XMARKER (tem); | |
1288 | m->buffer = 0; | |
1289 | tem = m->chain; | |
1290 | m->chain = Qnil; | |
1291 | } | |
1292 | BUF_MARKERS (b) = Qnil; | |
336cd056 | 1293 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1294 | |
1295 | /* Perhaps we should explicitly free the interval tree here... */ | |
1296 | } | |
33f7013e | 1297 | |
2f3f993b RS |
1298 | /* Reset the local variables, so that this buffer's local values |
1299 | won't be protected from GC. They would be protected | |
1300 | if they happened to remain encached in their symbols. | |
1301 | This gets rid of them for certain. */ | |
1302 | swap_out_buffer_local_variables (b); | |
13de9290 | 1303 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1304 | |
1ab256cb | 1305 | b->name = Qnil; |
336cd056 | 1306 | |
9ac0d9e0 | 1307 | BLOCK_INPUT; |
336cd056 | 1308 | if (! b->base_buffer) |
b86af064 | 1309 | free_buffer_text (b); |
336cd056 | 1310 | |
28e969dd JB |
1311 | if (b->newline_cache) |
1312 | { | |
1313 | free_region_cache (b->newline_cache); | |
1314 | b->newline_cache = 0; | |
1315 | } | |
1316 | if (b->width_run_cache) | |
1317 | { | |
1318 | free_region_cache (b->width_run_cache); | |
1319 | b->width_run_cache = 0; | |
1320 | } | |
1321 | b->width_table = Qnil; | |
9ac0d9e0 | 1322 | UNBLOCK_INPUT; |
1ab256cb RM |
1323 | b->undo_list = Qnil; |
1324 | ||
1325 | return Qt; | |
1326 | } | |
1327 | \f | |
36a8c287 JB |
1328 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1329 | we do this each time BUF is selected visibly, the more recently | |
1330 | selected buffers are always closer to the front of the list. This | |
1331 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1332 | |
01136e9b | 1333 | void |
1ab256cb RM |
1334 | record_buffer (buf) |
1335 | Lisp_Object buf; | |
1336 | { | |
1337 | register Lisp_Object link, prev; | |
773fbdb9 | 1338 | Lisp_Object frame; |
9ba9623d | 1339 | frame = selected_frame; |
1ab256cb RM |
1340 | |
1341 | prev = Qnil; | |
7539e11f | 1342 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1343 | { |
7539e11f | 1344 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1345 | break; |
1346 | prev = link; | |
1347 | } | |
1348 | ||
36a8c287 JB |
1349 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1350 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1351 | |
265a9e55 | 1352 | if (NILP (prev)) |
7539e11f | 1353 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1354 | else |
7539e11f | 1355 | XCDR (prev) = XCDR (XCDR (prev)); |
1ab256cb | 1356 | |
7539e11f | 1357 | XCDR (link) = Vbuffer_alist; |
1ab256cb | 1358 | Vbuffer_alist = link; |
7962a441 RS |
1359 | |
1360 | /* Now move this buffer to the front of frame_buffer_list also. */ | |
1361 | ||
1362 | prev = Qnil; | |
773fbdb9 | 1363 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1364 | link = XCDR (link)) |
7962a441 | 1365 | { |
7539e11f | 1366 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1367 | break; |
1368 | prev = link; | |
1369 | } | |
1370 | ||
1371 | /* Effectively do delq. */ | |
1372 | ||
1373 | if (CONSP (link)) | |
1374 | { | |
1375 | if (NILP (prev)) | |
773fbdb9 | 1376 | set_frame_buffer_list (frame, |
7539e11f | 1377 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1378 | else |
7539e11f | 1379 | XCDR (prev) = XCDR (XCDR (prev)); |
7962a441 | 1380 | |
7539e11f | 1381 | XCDR (link) = frame_buffer_list (frame); |
773fbdb9 | 1382 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1383 | } |
1384 | else | |
773fbdb9 | 1385 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1386 | } |
1387 | ||
a9ee7a59 KH |
1388 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
1389 | "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\ | |
1390 | Use this function before selecting the buffer, since it may need to inspect\n\ | |
1391 | the current buffer's major mode.") | |
a2428fa2 EN |
1392 | (buffer) |
1393 | Lisp_Object buffer; | |
a9ee7a59 KH |
1394 | { |
1395 | int count; | |
1396 | Lisp_Object function; | |
1397 | ||
1398 | function = buffer_defaults.major_mode; | |
1399 | if (NILP (function) && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1400 | function = current_buffer->major_mode; | |
1401 | ||
1402 | if (NILP (function) || EQ (function, Qfundamental_mode)) | |
1403 | return Qnil; | |
1404 | ||
1405 | count = specpdl_ptr - specpdl; | |
1406 | ||
1407 | /* To select a nonfundamental mode, | |
1408 | select the buffer temporarily and then call the mode function. */ | |
1409 | ||
1410 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1411 | ||
a2428fa2 | 1412 | Fset_buffer (buffer); |
a9ee7a59 KH |
1413 | call0 (function); |
1414 | ||
1415 | return unbind_to (count, Qnil); | |
1416 | } | |
1417 | ||
2594e0fd RS |
1418 | /* If switching buffers in WINDOW would be an error, return |
1419 | a C string saying what the error would be. */ | |
1420 | ||
1421 | char * | |
1422 | no_switch_window (window) | |
1423 | Lisp_Object window; | |
1ab256cb | 1424 | { |
1ab256cb | 1425 | Lisp_Object tem; |
2594e0fd RS |
1426 | if (EQ (minibuf_window, window)) |
1427 | return "Cannot switch buffers in minibuffer window"; | |
1428 | tem = Fwindow_dedicated_p (window); | |
265a9e55 | 1429 | if (!NILP (tem)) |
2594e0fd RS |
1430 | return "Cannot switch buffers in a dedicated window"; |
1431 | return NULL; | |
1432 | } | |
1433 | ||
1434 | /* Switch to buffer BUFFER in the selected window. | |
1435 | If NORECORD is non-nil, don't call record_buffer. */ | |
1436 | ||
1437 | Lisp_Object | |
1438 | switch_to_buffer_1 (buffer, norecord) | |
1439 | Lisp_Object buffer, norecord; | |
1440 | { | |
1441 | register Lisp_Object buf; | |
1ab256cb | 1442 | |
a25f13ae | 1443 | if (NILP (buffer)) |
773fbdb9 | 1444 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1445 | else |
a9ee7a59 | 1446 | { |
a25f13ae | 1447 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1448 | if (NILP (buf)) |
1449 | { | |
a25f13ae | 1450 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1451 | Fset_buffer_major_mode (buf); |
1452 | } | |
1453 | } | |
1ab256cb | 1454 | Fset_buffer (buf); |
265a9e55 | 1455 | if (NILP (norecord)) |
1ab256cb RM |
1456 | record_buffer (buf); |
1457 | ||
1458 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1459 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1460 | : selected_window, | |
1ab256cb RM |
1461 | buf); |
1462 | ||
cd0c235a | 1463 | return buf; |
1ab256cb RM |
1464 | } |
1465 | ||
2594e0fd RS |
1466 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
1467 | "Select buffer BUFFER in the current window.\n\ | |
1468 | BUFFER may be a buffer or a buffer name.\n\ | |
1469 | Optional second arg NORECORD non-nil means\n\ | |
1470 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
1471 | \n\ | |
1472 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
1473 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
1474 | the window-buffer correspondences.") | |
1475 | (buffer, norecord) | |
1476 | Lisp_Object buffer, norecord; | |
1477 | { | |
1478 | char *err; | |
1479 | ||
1480 | err = no_switch_window (selected_window); | |
1481 | if (err) error (err); | |
1482 | ||
1483 | return switch_to_buffer_1 (buffer, norecord); | |
1484 | } | |
1485 | ||
cd0c235a | 1486 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
1ab256cb RM |
1487 | "Select buffer BUFFER in some window, preferably a different one.\n\ |
1488 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
1489 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
1490 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
405615e5 RS |
1491 | window even if BUFFER is already visible in the selected window.\n\ |
1492 | This uses the function `display-buffer' as a subroutine; see the documentation\n\ | |
6d12711f RS |
1493 | of `display-buffer' for additional customization information.\n\ |
1494 | \n\ | |
1495 | Optional third arg NORECORD non-nil means\n\ | |
1496 | do not put this buffer at the front of the list of recently selected ones.") | |
1497 | (buffer, other_window, norecord) | |
1498 | Lisp_Object buffer, other_window, norecord; | |
1ab256cb RM |
1499 | { |
1500 | register Lisp_Object buf; | |
a25f13ae | 1501 | if (NILP (buffer)) |
773fbdb9 | 1502 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1503 | else |
7c2087ee | 1504 | { |
a25f13ae | 1505 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1506 | if (NILP (buf)) |
1507 | { | |
a25f13ae | 1508 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1509 | Fset_buffer_major_mode (buf); |
1510 | } | |
1511 | } | |
1ab256cb | 1512 | Fset_buffer (buf); |
6d12711f RS |
1513 | if (NILP (norecord)) |
1514 | record_buffer (buf); | |
6b17d756 | 1515 | Fselect_window (Fdisplay_buffer (buf, other_window, Qnil)); |
e8b3a22d | 1516 | return buf; |
1ab256cb RM |
1517 | } |
1518 | ||
1519 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
1520 | "Return the current buffer as a Lisp object.") | |
1521 | () | |
1522 | { | |
1523 | register Lisp_Object buf; | |
67180c6a | 1524 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1525 | return buf; |
1526 | } | |
1527 | \f | |
7ec44ec6 GM |
1528 | /* Set the current buffer to B. |
1529 | ||
1530 | We previously set windows_or_buffers_changed here to invalidate | |
1531 | global unchanged information in beg_unchanged and end_unchanged. | |
1532 | This is no longer necessary because we now compute unchanged | |
1533 | information on a buffer-basis. Every action affecting other | |
1534 | windows than the selected one requires a select_window at some | |
1535 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1536 | |
1537 | void | |
1538 | set_buffer_internal (b) | |
1539 | register struct buffer *b; | |
1540 | { | |
b5a225b4 | 1541 | if (current_buffer != b) |
7ec44ec6 | 1542 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1543 | } |
1544 | ||
1545 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1546 | This is used by redisplay. */ | |
1547 | ||
1548 | void | |
1549 | set_buffer_internal_1 (b) | |
1550 | register struct buffer *b; | |
1551 | { | |
1552 | register struct buffer *old_buf; | |
1553 | register Lisp_Object tail, valcontents; | |
1554 | Lisp_Object tem; | |
1555 | ||
b86af064 | 1556 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1557 | if (b->text->beg == NULL) |
b86af064 GM |
1558 | enlarge_buffer_text (b, 0); |
1559 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
684b01ee | 1560 | |
c7aa5005 KH |
1561 | if (current_buffer == b) |
1562 | return; | |
1563 | ||
1ab256cb RM |
1564 | old_buf = current_buffer; |
1565 | current_buffer = b; | |
1566 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1567 | ||
336cd056 RS |
1568 | if (old_buf) |
1569 | { | |
1570 | /* Put the undo list back in the base buffer, so that it appears | |
1571 | that an indirect buffer shares the undo list of its base. */ | |
1572 | if (old_buf->base_buffer) | |
1573 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1574 | ||
1575 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1576 | when it is not current, update them now. */ | |
1577 | if (! NILP (old_buf->pt_marker)) | |
1578 | { | |
1579 | Lisp_Object obuf; | |
1580 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1581 | set_marker_both (old_buf->pt_marker, obuf, |
1582 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1583 | } |
1584 | if (! NILP (old_buf->begv_marker)) | |
1585 | { | |
1586 | Lisp_Object obuf; | |
1587 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1588 | set_marker_both (old_buf->begv_marker, obuf, |
1589 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1590 | } |
1591 | if (! NILP (old_buf->zv_marker)) | |
1592 | { | |
1593 | Lisp_Object obuf; | |
1594 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1595 | set_marker_both (old_buf->zv_marker, obuf, |
1596 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1597 | } |
1598 | } | |
1599 | ||
1600 | /* Get the undo list from the base buffer, so that it appears | |
1601 | that an indirect buffer shares the undo list of its base. */ | |
1602 | if (b->base_buffer) | |
1603 | b->undo_list = b->base_buffer->undo_list; | |
1604 | ||
1605 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1606 | when it is not current, fetch them now. */ | |
1607 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1608 | { |
1609 | BUF_PT (b) = marker_position (b->pt_marker); | |
1610 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1611 | } | |
336cd056 | 1612 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1613 | { |
1614 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1615 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1616 | } | |
336cd056 | 1617 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1618 | { |
1619 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1620 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1621 | } | |
336cd056 | 1622 | |
1ab256cb RM |
1623 | /* Look down buffer's list of local Lisp variables |
1624 | to find and update any that forward into C variables. */ | |
1625 | ||
7539e11f | 1626 | for (tail = b->local_var_alist; !NILP (tail); tail = XCDR (tail)) |
1ab256cb | 1627 | { |
7539e11f | 1628 | valcontents = XSYMBOL (XCAR (XCAR (tail)))->value; |
a7a60ce9 KH |
1629 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1630 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1631 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1632 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1633 | /* Just reference the variable |
1634 | to cause it to become set for this buffer. */ | |
7539e11f | 1635 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1636 | } |
1637 | ||
1638 | /* Do the same with any others that were local to the previous buffer */ | |
1639 | ||
1640 | if (old_buf) | |
7539e11f | 1641 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCDR (tail)) |
1ab256cb | 1642 | { |
7539e11f | 1643 | valcontents = XSYMBOL (XCAR (XCAR (tail)))->value; |
a7a60ce9 KH |
1644 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1645 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1646 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1647 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1648 | /* Just reference the variable |
1649 | to cause it to become set for this buffer. */ | |
7539e11f | 1650 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1651 | } |
1652 | } | |
1653 | ||
336cd056 | 1654 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1655 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1656 | |
1657 | void | |
1658 | set_buffer_temp (b) | |
1659 | struct buffer *b; | |
1660 | { | |
1661 | register struct buffer *old_buf; | |
1662 | ||
1663 | if (current_buffer == b) | |
1664 | return; | |
1665 | ||
1666 | old_buf = current_buffer; | |
1667 | current_buffer = b; | |
1668 | ||
1669 | if (old_buf) | |
1670 | { | |
1671 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1672 | when it is not current, update them now. */ | |
1673 | if (! NILP (old_buf->pt_marker)) | |
1674 | { | |
1675 | Lisp_Object obuf; | |
1676 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1677 | set_marker_both (old_buf->pt_marker, obuf, |
1678 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1679 | } |
1680 | if (! NILP (old_buf->begv_marker)) | |
1681 | { | |
1682 | Lisp_Object obuf; | |
1683 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1684 | set_marker_both (old_buf->begv_marker, obuf, |
1685 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1686 | } |
1687 | if (! NILP (old_buf->zv_marker)) | |
1688 | { | |
1689 | Lisp_Object obuf; | |
1690 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1691 | set_marker_both (old_buf->zv_marker, obuf, |
1692 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1693 | } |
1694 | } | |
1695 | ||
1696 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1697 | when it is not current, fetch them now. */ | |
1698 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1699 | { |
1700 | BUF_PT (b) = marker_position (b->pt_marker); | |
1701 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1702 | } | |
336cd056 | 1703 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1704 | { |
1705 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1706 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1707 | } | |
336cd056 | 1708 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1709 | { |
1710 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1711 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1712 | } | |
336cd056 RS |
1713 | } |
1714 | ||
1ab256cb RM |
1715 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
1716 | "Make the buffer BUFFER current for editing operations.\n\ | |
1717 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
1718 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
1719 | This function does not display the buffer, so its effect ends\n\ | |
1720 | when the current command terminates.\n\ | |
1721 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
a25f13ae KH |
1722 | (buffer) |
1723 | register Lisp_Object buffer; | |
1ab256cb | 1724 | { |
a25f13ae KH |
1725 | register Lisp_Object buf; |
1726 | buf = Fget_buffer (buffer); | |
1727 | if (NILP (buf)) | |
1728 | nsberror (buffer); | |
1729 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1730 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1731 | set_buffer_internal (XBUFFER (buf)); |
1732 | return buf; | |
1ab256cb | 1733 | } |
d0628b06 RS |
1734 | |
1735 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1736 | ||
1737 | Lisp_Object | |
1738 | set_buffer_if_live (buffer) | |
1739 | Lisp_Object buffer; | |
1740 | { | |
1741 | if (! NILP (XBUFFER (buffer)->name)) | |
1742 | Fset_buffer (buffer); | |
1743 | return Qnil; | |
1744 | } | |
1ab256cb RM |
1745 | \f |
1746 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1747 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
1748 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
1749 | () | |
1750 | { | |
a96b68f1 RS |
1751 | if (!NILP (current_buffer->read_only) |
1752 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1753 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1754 | return Qnil; | |
1755 | } | |
1756 | ||
1757 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
1758 | "Put BUFFER at the end of the list of all buffers.\n\ | |
1759 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 1760 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
1761 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
1762 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
1763 | selected window if it is displayed there.") | |
a2428fa2 EN |
1764 | (buffer) |
1765 | register Lisp_Object buffer; | |
1ab256cb | 1766 | { |
b271272a | 1767 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 1768 | if (NILP (buffer)) |
a5611885 | 1769 | { |
a2428fa2 | 1770 | XSETBUFFER (buffer, current_buffer); |
0a63b212 RS |
1771 | |
1772 | /* If we're burying the current buffer, unshow it. */ | |
773fbdb9 | 1773 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); |
a5611885 | 1774 | } |
1ab256cb RM |
1775 | else |
1776 | { | |
1777 | Lisp_Object buf1; | |
1778 | ||
a2428fa2 | 1779 | buf1 = Fget_buffer (buffer); |
265a9e55 | 1780 | if (NILP (buf1)) |
a2428fa2 EN |
1781 | nsberror (buffer); |
1782 | buffer = buf1; | |
b271272a JB |
1783 | } |
1784 | ||
a1a8b28e GM |
1785 | /* Move buffer to the end of the buffer list. Do nothing if the |
1786 | buffer is killed. */ | |
1787 | if (!NILP (XBUFFER (buffer)->name)) | |
1788 | { | |
1789 | Lisp_Object aelt, link; | |
b271272a | 1790 | |
a1a8b28e GM |
1791 | aelt = Frassq (buffer, Vbuffer_alist); |
1792 | link = Fmemq (aelt, Vbuffer_alist); | |
1793 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1794 | XCDR (link) = Qnil; | |
1795 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1ab256cb | 1796 | |
a1a8b28e GM |
1797 | frames_bury_buffer (buffer); |
1798 | } | |
dec989eb | 1799 | |
1ab256cb RM |
1800 | return Qnil; |
1801 | } | |
1802 | \f | |
c922bc55 | 1803 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1804 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1805 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1806 | so the buffer is truly empty after this.") |
1807 | () | |
1808 | { | |
1809 | Fwiden (); | |
c0d9a0c3 GM |
1810 | |
1811 | del_range (BEG, Z); | |
c280bc6a | 1812 | |
1ab256cb RM |
1813 | current_buffer->last_window_start = 1; |
1814 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1815 | if future size is less than past size. Use of erase-buffer | |
1816 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 1817 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
1818 | return Qnil; |
1819 | } | |
1820 | ||
01136e9b | 1821 | void |
1ab256cb RM |
1822 | validate_region (b, e) |
1823 | register Lisp_Object *b, *e; | |
1824 | { | |
1ab256cb RM |
1825 | CHECK_NUMBER_COERCE_MARKER (*b, 0); |
1826 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1827 | ||
1828 | if (XINT (*b) > XINT (*e)) | |
1829 | { | |
03192067 KH |
1830 | Lisp_Object tem; |
1831 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1832 | } |
1833 | ||
1834 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1835 | && XINT (*e) <= ZV)) | |
1836 | args_out_of_range (*b, *e); | |
1837 | } | |
1838 | \f | |
b05525fa RS |
1839 | /* Advance BYTE_POS up to a character boundary |
1840 | and return the adjusted position. */ | |
1841 | ||
1842 | static int | |
1843 | advance_to_char_boundary (byte_pos) | |
1844 | int byte_pos; | |
1845 | { | |
f8449323 | 1846 | int c; |
b05525fa | 1847 | |
f8449323 RS |
1848 | if (byte_pos == BEG) |
1849 | /* Beginning of buffer is always a character boundary. */ | |
1850 | return 1; | |
1851 | ||
1852 | c = FETCH_BYTE (byte_pos); | |
1853 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 1854 | { |
1be6387d | 1855 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 1856 | multibyte sequence. */ |
a9bcded1 KH |
1857 | int orig_byte_pos = byte_pos; |
1858 | ||
1859 | do | |
1860 | { | |
1861 | byte_pos--; | |
1862 | c = FETCH_BYTE (byte_pos); | |
1863 | } | |
1864 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 1865 | INC_POS (byte_pos); |
a9bcded1 KH |
1866 | if (byte_pos < orig_byte_pos) |
1867 | byte_pos = orig_byte_pos; | |
f8449323 RS |
1868 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
1869 | surely advance to the correct character boundary. If C is | |
1870 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
1871 | } |
1872 | ||
20773569 | 1873 | return byte_pos; |
b05525fa RS |
1874 | } |
1875 | ||
3ac81adb RS |
1876 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
1877 | 1, 1, 0, | |
1878 | "Set the multibyte flag of the current buffer to FLAG.\n\ | |
1879 | If FLAG is t, this makes the buffer a multibyte buffer.\n\ | |
1880 | If FLAG is nil, this makes the buffer a single-byte buffer.\n\ | |
1881 | The buffer contents remain unchanged as a sequence of bytes\n\ | |
1882 | but the contents viewed as characters do change.") | |
1883 | (flag) | |
1884 | Lisp_Object flag; | |
1885 | { | |
1886 | Lisp_Object tail, markers; | |
abc9d959 | 1887 | struct buffer *other; |
a9bcded1 KH |
1888 | int undo_enabled_p = !EQ (current_buffer->undo_list, Qt); |
1889 | int begv = BEGV, zv = ZV; | |
1890 | int narrowed = (BEG != begv || Z != zv); | |
ed00559d | 1891 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
3ac81adb | 1892 | |
6e553d5e RS |
1893 | if (current_buffer->base_buffer) |
1894 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
1895 | ||
70e77119 AS |
1896 | /* Do nothing if nothing actually changes. */ |
1897 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
1898 | return flag; | |
1899 | ||
b05525fa RS |
1900 | /* It would be better to update the list, |
1901 | but this is good enough for now. */ | |
a9bcded1 KH |
1902 | if (undo_enabled_p) |
1903 | current_buffer->undo_list = Qt; | |
b05525fa | 1904 | |
3ac81adb RS |
1905 | /* If the cached position is for this buffer, clear it out. */ |
1906 | clear_charpos_cache (current_buffer); | |
1907 | ||
a9bcded1 KH |
1908 | if (narrowed) |
1909 | Fwiden (); | |
1910 | ||
3ac81adb RS |
1911 | if (NILP (flag)) |
1912 | { | |
a9bcded1 KH |
1913 | int pos, stop; |
1914 | unsigned char *p; | |
1915 | ||
3ac81adb RS |
1916 | /* Do this first, so it can use CHAR_TO_BYTE |
1917 | to calculate the old correspondences. */ | |
1918 | set_intervals_multibyte (0); | |
1919 | ||
1920 | current_buffer->enable_multibyte_characters = Qnil; | |
1921 | ||
1922 | Z = Z_BYTE; | |
1923 | BEGV = BEGV_BYTE; | |
1924 | ZV = ZV_BYTE; | |
1925 | GPT = GPT_BYTE; | |
1926 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
1927 | ||
1928 | tail = BUF_MARKERS (current_buffer); | |
8801a864 | 1929 | while (! NILP (tail)) |
3ac81adb RS |
1930 | { |
1931 | XMARKER (tail)->charpos = XMARKER (tail)->bytepos; | |
1932 | tail = XMARKER (tail)->chain; | |
1933 | } | |
a9bcded1 KH |
1934 | |
1935 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
1936 | pos = BEG; | |
1937 | stop = GPT; | |
1938 | p = BEG_ADDR; | |
1939 | while (1) | |
1940 | { | |
1941 | int c, bytes; | |
1942 | ||
1943 | if (pos == stop) | |
1944 | { | |
1945 | if (pos == Z) | |
1946 | break; | |
1947 | p = GAP_END_ADDR; | |
1948 | stop = Z; | |
1949 | } | |
1950 | if (MULTIBYTE_STR_AS_UNIBYTE_P (p, bytes)) | |
1951 | p += bytes, pos += bytes; | |
1952 | else | |
1953 | { | |
1954 | c = STRING_CHAR (p, stop - pos); | |
1955 | /* Delete all bytes for this 8-bit character but the | |
1956 | last one, and change the last one to the charcter | |
1957 | code. */ | |
1958 | bytes--; | |
1959 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
1960 | p = GAP_END_ADDR; | |
1961 | *p++ = c; | |
1962 | pos++; | |
1963 | if (begv > pos) | |
1964 | begv -= bytes; | |
1965 | if (zv > pos) | |
1966 | zv -= bytes; | |
1967 | stop = Z; | |
1968 | } | |
1969 | } | |
1970 | if (narrowed) | |
1971 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
1972 | } |
1973 | else | |
1974 | { | |
a9bcded1 KH |
1975 | int pt = PT; |
1976 | int pos, stop; | |
1977 | unsigned char *p; | |
1978 | ||
673c57d2 | 1979 | /* Be sure not to have a multibyte sequence striding over the GAP. |
a9bcded1 KH |
1980 | Ex: We change this: "...abc\201 _GAP_ \241def..." |
1981 | to: "...abc _GAP_ \201\241def..." */ | |
673c57d2 KH |
1982 | |
1983 | if (GPT_BYTE > 1 && GPT_BYTE < Z_BYTE | |
1984 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) | |
1985 | { | |
1986 | unsigned char *p = GPT_ADDR - 1; | |
1987 | ||
1988 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
1989 | if (BASE_LEADING_CODE_P (*p)) | |
1990 | { | |
1991 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
1992 | ||
1993 | move_gap_both (new_gpt, new_gpt); | |
1994 | } | |
1995 | } | |
1996 | ||
a9bcded1 KH |
1997 | /* Make the buffer contents valid as multibyte by converting |
1998 | 8-bit characters to multibyte form. */ | |
1999 | pos = BEG; | |
2000 | stop = GPT; | |
2001 | p = BEG_ADDR; | |
2002 | while (1) | |
2003 | { | |
2004 | int bytes; | |
2005 | ||
2006 | if (pos == stop) | |
2007 | { | |
2008 | if (pos == Z) | |
2009 | break; | |
2010 | p = GAP_END_ADDR; | |
2011 | stop = Z; | |
2012 | } | |
2013 | ||
2014 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p, stop - pos, bytes)) | |
2015 | p += bytes, pos += bytes; | |
2016 | else | |
2017 | { | |
2018 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
2019 | ||
2020 | bytes = CHAR_STRING (*p, tmp); | |
2021 | *p = tmp[0]; | |
2022 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2023 | bytes--; | |
2024 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2025 | /* Now the gap is after the just inserted data. */ | |
2026 | pos = GPT; | |
2027 | p = GAP_END_ADDR; | |
2028 | if (pos <= begv) | |
2029 | begv += bytes; | |
2030 | if (pos <= zv) | |
2031 | zv += bytes; | |
2032 | if (pos <= pt) | |
2033 | pt += bytes; | |
2034 | stop = Z; | |
2035 | } | |
2036 | } | |
2037 | ||
2038 | if (pt != PT) | |
2039 | TEMP_SET_PT (pt); | |
2040 | ||
2041 | if (narrowed) | |
2042 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2043 | ||
3ac81adb RS |
2044 | /* Do this first, so that chars_in_text asks the right question. |
2045 | set_intervals_multibyte needs it too. */ | |
2046 | current_buffer->enable_multibyte_characters = Qt; | |
2047 | ||
b05525fa | 2048 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2049 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2050 | |
673c57d2 | 2051 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2052 | |
2053 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2054 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2055 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2056 | else |
2057 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2058 | |
2059 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2060 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2061 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2062 | else |
2063 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2064 | |
2065 | { | |
2066 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2067 | int pt; | |
2068 | ||
2069 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2070 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2071 | else |
2072 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2073 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2074 | } | |
3ac81adb RS |
2075 | |
2076 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2077 | |
2078 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2079 | getting confused by the markers that have not yet been updated. | |
2080 | It is also a signal that it should never create a marker. */ | |
3ac81adb RS |
2081 | BUF_MARKERS (current_buffer) = Qnil; |
2082 | ||
8801a864 | 2083 | while (! NILP (tail)) |
3ac81adb | 2084 | { |
b05525fa RS |
2085 | XMARKER (tail)->bytepos |
2086 | = advance_to_char_boundary (XMARKER (tail)->bytepos); | |
3ac81adb | 2087 | XMARKER (tail)->charpos = BYTE_TO_CHAR (XMARKER (tail)->bytepos); |
b05525fa | 2088 | |
3ac81adb RS |
2089 | tail = XMARKER (tail)->chain; |
2090 | } | |
b69f9797 RS |
2091 | |
2092 | /* Make sure no markers were put on the chain | |
2093 | while the chain value was incorrect. */ | |
2094 | if (! EQ (BUF_MARKERS (current_buffer), Qnil)) | |
2095 | abort (); | |
2096 | ||
3ac81adb RS |
2097 | BUF_MARKERS (current_buffer) = markers; |
2098 | ||
2099 | /* Do this last, so it can calculate the new correspondences | |
2100 | between chars and bytes. */ | |
2101 | set_intervals_multibyte (1); | |
2102 | } | |
2103 | ||
a9bcded1 KH |
2104 | if (undo_enabled_p) |
2105 | current_buffer->undo_list = Qnil; | |
2106 | ||
724b203f GM |
2107 | /* Changing the multibyteness of a buffer means that all windows |
2108 | showing that buffer must be updated thoroughly. */ | |
2109 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2110 | ++windows_or_buffers_changed; | |
2111 | ||
abc9d959 RS |
2112 | /* Copy this buffer's new multibyte status |
2113 | into all of its indirect buffers. */ | |
2114 | for (other = all_buffers; other; other = other->next) | |
2115 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2116 | { |
2117 | other->enable_multibyte_characters | |
2118 | = current_buffer->enable_multibyte_characters; | |
2119 | other->prevent_redisplay_optimizations_p = 1; | |
2120 | } | |
abc9d959 | 2121 | |
ed00559d KH |
2122 | /* Restore the modifiedness of the buffer. */ |
2123 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2124 | Fset_buffer_modified_p (Qnil); | |
2125 | ||
3ac81adb RS |
2126 | return flag; |
2127 | } | |
2128 | \f | |
1ab256cb RM |
2129 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
2130 | 0, 0, 0, | |
2131 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
2132 | Most local variable bindings are eliminated so that the default values\n\ | |
2133 | become effective once more. Also, the syntax table is set from\n\ | |
2134 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
2135 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
2136 | This function also forces redisplay of the mode line.\n\ | |
2137 | \n\ | |
2138 | Every function to select a new major mode starts by\n\ | |
2139 | calling this function.\n\n\ | |
2140 | As a special exception, local variables whose names have\n\ | |
c5a15222 RS |
2141 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
2142 | \n\ | |
2143 | The first thing this function does is run\n\ | |
2144 | the normal hook `change-major-mode-hook'.") | |
1ab256cb RM |
2145 | () |
2146 | { | |
2147 | register Lisp_Object alist, sym, tem; | |
2148 | Lisp_Object oalist; | |
7410477a | 2149 | |
fd186f07 RS |
2150 | if (!NILP (Vrun_hooks)) |
2151 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
2152 | oalist = current_buffer->local_var_alist; |
2153 | ||
2f3f993b RS |
2154 | /* Make sure none of the bindings in oalist |
2155 | remain swapped in, in their symbols. */ | |
1ab256cb | 2156 | |
2f3f993b | 2157 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2158 | |
2159 | /* Actually eliminate all local bindings of this buffer. */ | |
2160 | ||
13de9290 | 2161 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb RM |
2162 | |
2163 | /* Redisplay mode lines; we are changing major mode. */ | |
2164 | ||
2165 | update_mode_lines++; | |
2166 | ||
2167 | /* Any which are supposed to be permanent, | |
2168 | make local again, with the same values they had. */ | |
2169 | ||
7539e11f | 2170 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
1ab256cb | 2171 | { |
7539e11f | 2172 | sym = XCAR (XCAR (alist)); |
1ab256cb | 2173 | tem = Fget (sym, Qpermanent_local); |
265a9e55 | 2174 | if (! NILP (tem)) |
01050cb5 RM |
2175 | { |
2176 | Fmake_local_variable (sym); | |
7539e11f | 2177 | Fset (sym, XCDR (XCAR (alist))); |
01050cb5 | 2178 | } |
1ab256cb RM |
2179 | } |
2180 | ||
2181 | /* Force mode-line redisplay. Useful here because all major mode | |
2182 | commands call this function. */ | |
2183 | update_mode_lines++; | |
2184 | ||
2185 | return Qnil; | |
2186 | } | |
2f3f993b RS |
2187 | |
2188 | /* Make sure no local variables remain set up with buffer B | |
2189 | for their current values. */ | |
2190 | ||
2191 | static void | |
2192 | swap_out_buffer_local_variables (b) | |
2193 | struct buffer *b; | |
2194 | { | |
2195 | Lisp_Object oalist, alist, sym, tem, buffer; | |
2196 | ||
2197 | XSETBUFFER (buffer, b); | |
2198 | oalist = b->local_var_alist; | |
2199 | ||
7539e11f | 2200 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
2f3f993b | 2201 | { |
7539e11f | 2202 | sym = XCAR (XCAR (alist)); |
2f3f993b RS |
2203 | |
2204 | /* Need not do anything if some other buffer's binding is now encached. */ | |
3d871c85 | 2205 | tem = XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->buffer; |
8801a864 | 2206 | if (BUFFERP (tem) && XBUFFER (tem) == current_buffer) |
2f3f993b RS |
2207 | { |
2208 | /* Symbol is set up for this buffer's old local value. | |
2209 | Set it up for the current buffer with the default value. */ | |
2210 | ||
3d871c85 | 2211 | tem = XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr; |
2f3f993b RS |
2212 | /* Store the symbol's current value into the alist entry |
2213 | it is currently set up for. This is so that, if the | |
2214 | local is marked permanent, and we make it local again | |
2215 | later in Fkill_all_local_variables, we don't lose the value. */ | |
7539e11f | 2216 | XCDR (XCAR (tem)) |
3d871c85 | 2217 | = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->realvalue); |
2f3f993b | 2218 | /* Switch to the symbol's default-value alist entry. */ |
7539e11f | 2219 | XCAR (tem) = tem; |
2f3f993b | 2220 | /* Mark it as current for buffer B. */ |
3d871c85 | 2221 | XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->buffer = buffer; |
2f3f993b | 2222 | /* Store the current value into any forwarding in the symbol. */ |
3d871c85 RS |
2223 | store_symval_forwarding (sym, |
2224 | XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->realvalue, | |
7539e11f | 2225 | XCDR (tem)); |
2f3f993b RS |
2226 | } |
2227 | } | |
2228 | } | |
1ab256cb | 2229 | \f |
2eec3b4e RS |
2230 | /* Find all the overlays in the current buffer that contain position POS. |
2231 | Return the number found, and store them in a vector in *VEC_PTR. | |
2232 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
2233 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
2234 | or ZV if there are no more overlays. | |
bbbe9545 | 2235 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 RS |
2236 | or where an overlay starts which ends at or after POS; |
2237 | or BEGV if there are no such overlays. | |
239c932b | 2238 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2239 | |
2240 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2241 | when this function is called. |
2242 | ||
2243 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2244 | If EXTEND is zero, we never extend the vector, | |
2245 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2246 | But we still return the total number of overlays. |
2247 | ||
2248 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2249 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2250 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2251 | |
2252 | int | |
ac869cf7 | 2253 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
2eec3b4e | 2254 | int pos; |
61d54cd5 | 2255 | int extend; |
2eec3b4e RS |
2256 | Lisp_Object **vec_ptr; |
2257 | int *len_ptr; | |
2258 | int *next_ptr; | |
239c932b | 2259 | int *prev_ptr; |
ac869cf7 | 2260 | int change_req; |
1ab256cb | 2261 | { |
6af718a4 | 2262 | Lisp_Object tail, overlay, start, end; |
2eec3b4e RS |
2263 | int idx = 0; |
2264 | int len = *len_ptr; | |
2265 | Lisp_Object *vec = *vec_ptr; | |
2266 | int next = ZV; | |
239c932b | 2267 | int prev = BEGV; |
61d54cd5 RS |
2268 | int inhibit_storing = 0; |
2269 | ||
2eec3b4e | 2270 | for (tail = current_buffer->overlays_before; |
8fc0589a | 2271 | GC_CONSP (tail); |
7539e11f | 2272 | tail = XCDR (tail)) |
2eec3b4e | 2273 | { |
239c932b | 2274 | int startpos, endpos; |
52f8ec73 | 2275 | |
7539e11f | 2276 | overlay = XCAR (tail); |
1ab256cb | 2277 | |
2eec3b4e RS |
2278 | start = OVERLAY_START (overlay); |
2279 | end = OVERLAY_END (overlay); | |
239c932b RS |
2280 | endpos = OVERLAY_POSITION (end); |
2281 | if (endpos < pos) | |
2282 | { | |
2283 | if (prev < endpos) | |
2284 | prev = endpos; | |
2285 | break; | |
2286 | } | |
413e06a4 RS |
2287 | startpos = OVERLAY_POSITION (start); |
2288 | /* This one ends at or after POS | |
daa1c109 | 2289 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2290 | if (prev < startpos && startpos < pos) |
2291 | prev = startpos; | |
239c932b RS |
2292 | if (endpos == pos) |
2293 | continue; | |
2eec3b4e RS |
2294 | if (startpos <= pos) |
2295 | { | |
2296 | if (idx == len) | |
2297 | { | |
61d54cd5 RS |
2298 | /* The supplied vector is full. |
2299 | Either make it bigger, or don't store any more in it. */ | |
2300 | if (extend) | |
2301 | { | |
0552666b GM |
2302 | /* Make it work with an initial len == 0. */ |
2303 | len *= 2; | |
2304 | if (len == 0) | |
2305 | len = 4; | |
2306 | *len_ptr = len; | |
61d54cd5 RS |
2307 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2308 | *vec_ptr = vec; | |
2309 | } | |
2310 | else | |
2311 | inhibit_storing = 1; | |
2eec3b4e | 2312 | } |
61d54cd5 RS |
2313 | |
2314 | if (!inhibit_storing) | |
2315 | vec[idx] = overlay; | |
2316 | /* Keep counting overlays even if we can't return them all. */ | |
2317 | idx++; | |
2eec3b4e RS |
2318 | } |
2319 | else if (startpos < next) | |
2320 | next = startpos; | |
2321 | } | |
2322 | ||
2323 | for (tail = current_buffer->overlays_after; | |
8fc0589a | 2324 | GC_CONSP (tail); |
7539e11f | 2325 | tail = XCDR (tail)) |
1ab256cb | 2326 | { |
239c932b | 2327 | int startpos, endpos; |
52f8ec73 | 2328 | |
7539e11f | 2329 | overlay = XCAR (tail); |
2eec3b4e RS |
2330 | |
2331 | start = OVERLAY_START (overlay); | |
2332 | end = OVERLAY_END (overlay); | |
2333 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2334 | if (pos < startpos) |
2eec3b4e RS |
2335 | { |
2336 | if (startpos < next) | |
2337 | next = startpos; | |
2338 | break; | |
2339 | } | |
239c932b RS |
2340 | endpos = OVERLAY_POSITION (end); |
2341 | if (pos < endpos) | |
2eec3b4e RS |
2342 | { |
2343 | if (idx == len) | |
2344 | { | |
61d54cd5 RS |
2345 | if (extend) |
2346 | { | |
2347 | *len_ptr = len *= 2; | |
0552666b GM |
2348 | if (len == 0) |
2349 | len = *len_ptr = 4; | |
61d54cd5 RS |
2350 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2351 | *vec_ptr = vec; | |
2352 | } | |
2353 | else | |
2354 | inhibit_storing = 1; | |
2eec3b4e | 2355 | } |
61d54cd5 RS |
2356 | |
2357 | if (!inhibit_storing) | |
2358 | vec[idx] = overlay; | |
2359 | idx++; | |
413e06a4 RS |
2360 | |
2361 | if (startpos < pos && startpos > prev) | |
2362 | prev = startpos; | |
2eec3b4e | 2363 | } |
239c932b RS |
2364 | else if (endpos < pos && endpos > prev) |
2365 | prev = endpos; | |
1d5f4c1d MB |
2366 | else if (endpos == pos && startpos > prev |
2367 | && (!change_req || startpos < pos)) | |
413e06a4 | 2368 | prev = startpos; |
1ab256cb RM |
2369 | } |
2370 | ||
239c932b RS |
2371 | if (next_ptr) |
2372 | *next_ptr = next; | |
2373 | if (prev_ptr) | |
2374 | *prev_ptr = prev; | |
2eec3b4e RS |
2375 | return idx; |
2376 | } | |
74514898 RS |
2377 | \f |
2378 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
2379 | or are empty at BEG. |
2380 | ||
74514898 RS |
2381 | Return the number found, and store them in a vector in *VEC_PTR. |
2382 | Store in *LEN_PTR the size allocated for the vector. | |
2383 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2384 | or ZV if there are no more overlays. | |
2385 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2386 | or BEGV if there are no previous overlays. | |
2387 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2388 | ||
2389 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2390 | when this function is called. | |
2391 | ||
2392 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2393 | If EXTEND is zero, we never extend the vector, | |
2394 | and we store only as many overlays as will fit. | |
2395 | But we still return the total number of overlays. */ | |
2396 | ||
2397 | int | |
2398 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) | |
2399 | int beg, end; | |
2400 | int extend; | |
2401 | Lisp_Object **vec_ptr; | |
2402 | int *len_ptr; | |
2403 | int *next_ptr; | |
2404 | int *prev_ptr; | |
2405 | { | |
6af718a4 | 2406 | Lisp_Object tail, overlay, ostart, oend; |
74514898 RS |
2407 | int idx = 0; |
2408 | int len = *len_ptr; | |
2409 | Lisp_Object *vec = *vec_ptr; | |
2410 | int next = ZV; | |
2411 | int prev = BEGV; | |
2412 | int inhibit_storing = 0; | |
2413 | ||
2414 | for (tail = current_buffer->overlays_before; | |
2415 | GC_CONSP (tail); | |
7539e11f | 2416 | tail = XCDR (tail)) |
74514898 RS |
2417 | { |
2418 | int startpos, endpos; | |
2419 | ||
7539e11f | 2420 | overlay = XCAR (tail); |
74514898 RS |
2421 | |
2422 | ostart = OVERLAY_START (overlay); | |
2423 | oend = OVERLAY_END (overlay); | |
2424 | endpos = OVERLAY_POSITION (oend); | |
2425 | if (endpos < beg) | |
2426 | { | |
2427 | if (prev < endpos) | |
2428 | prev = endpos; | |
2429 | break; | |
2430 | } | |
2431 | startpos = OVERLAY_POSITION (ostart); | |
2432 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 2433 | or is empty at the start of the range. */ |
74514898 | 2434 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2435 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2436 | { |
2437 | if (idx == len) | |
2438 | { | |
2439 | /* The supplied vector is full. | |
2440 | Either make it bigger, or don't store any more in it. */ | |
2441 | if (extend) | |
2442 | { | |
2443 | *len_ptr = len *= 2; | |
2444 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
2445 | *vec_ptr = vec; | |
2446 | } | |
2447 | else | |
2448 | inhibit_storing = 1; | |
2449 | } | |
2450 | ||
2451 | if (!inhibit_storing) | |
2452 | vec[idx] = overlay; | |
2453 | /* Keep counting overlays even if we can't return them all. */ | |
2454 | idx++; | |
2455 | } | |
2456 | else if (startpos < next) | |
2457 | next = startpos; | |
2458 | } | |
2459 | ||
2460 | for (tail = current_buffer->overlays_after; | |
2461 | GC_CONSP (tail); | |
7539e11f | 2462 | tail = XCDR (tail)) |
74514898 RS |
2463 | { |
2464 | int startpos, endpos; | |
2465 | ||
7539e11f | 2466 | overlay = XCAR (tail); |
74514898 RS |
2467 | |
2468 | ostart = OVERLAY_START (overlay); | |
2469 | oend = OVERLAY_END (overlay); | |
2470 | startpos = OVERLAY_POSITION (ostart); | |
2471 | if (end < startpos) | |
2472 | { | |
2473 | if (startpos < next) | |
2474 | next = startpos; | |
2475 | break; | |
2476 | } | |
2477 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
2478 | /* Count an interval if it either overlaps the range |
2479 | or is empty at the start of the range. */ | |
74514898 | 2480 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2481 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2482 | { |
2483 | if (idx == len) | |
2484 | { | |
2485 | if (extend) | |
2486 | { | |
2487 | *len_ptr = len *= 2; | |
2488 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
2489 | *vec_ptr = vec; | |
2490 | } | |
2491 | else | |
2492 | inhibit_storing = 1; | |
2493 | } | |
2494 | ||
2495 | if (!inhibit_storing) | |
2496 | vec[idx] = overlay; | |
2497 | idx++; | |
2498 | } | |
2499 | else if (endpos < beg && endpos > prev) | |
2500 | prev = endpos; | |
2501 | } | |
fc04fa47 | 2502 | |
74514898 RS |
2503 | if (next_ptr) |
2504 | *next_ptr = next; | |
2505 | if (prev_ptr) | |
2506 | *prev_ptr = prev; | |
2507 | return idx; | |
2508 | } | |
2509 | \f | |
fc04fa47 KH |
2510 | /* Fast function to just test if we're at an overlay boundary. */ |
2511 | int | |
2512 | overlay_touches_p (pos) | |
2513 | int pos; | |
2514 | { | |
2515 | Lisp_Object tail, overlay; | |
2516 | ||
2517 | for (tail = current_buffer->overlays_before; GC_CONSP (tail); | |
7539e11f | 2518 | tail = XCDR (tail)) |
fc04fa47 KH |
2519 | { |
2520 | int endpos; | |
2521 | ||
7539e11f | 2522 | overlay = XCAR (tail); |
fc04fa47 KH |
2523 | if (!GC_OVERLAYP (overlay)) |
2524 | abort (); | |
2525 | ||
2526 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2527 | if (endpos < pos) | |
2528 | break; | |
2529 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2530 | return 1; | |
2531 | } | |
2532 | ||
2533 | for (tail = current_buffer->overlays_after; GC_CONSP (tail); | |
7539e11f | 2534 | tail = XCDR (tail)) |
fc04fa47 KH |
2535 | { |
2536 | int startpos; | |
2537 | ||
7539e11f | 2538 | overlay = XCAR (tail); |
fc04fa47 KH |
2539 | if (!GC_OVERLAYP (overlay)) |
2540 | abort (); | |
2541 | ||
2542 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2543 | if (pos < startpos) | |
2544 | break; | |
2545 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2546 | return 1; | |
2547 | } | |
2548 | return 0; | |
2549 | } | |
2eec3b4e | 2550 | \f |
5985d248 KH |
2551 | struct sortvec |
2552 | { | |
2553 | Lisp_Object overlay; | |
2554 | int beg, end; | |
2555 | int priority; | |
2556 | }; | |
2557 | ||
2558 | static int | |
dfcf069d AS |
2559 | compare_overlays (v1, v2) |
2560 | const void *v1, *v2; | |
5985d248 | 2561 | { |
dfcf069d AS |
2562 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2563 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2564 | if (s1->priority != s2->priority) |
2565 | return s1->priority - s2->priority; | |
2566 | if (s1->beg != s2->beg) | |
2567 | return s1->beg - s2->beg; | |
2568 | if (s1->end != s2->end) | |
2569 | return s2->end - s1->end; | |
2570 | return 0; | |
2571 | } | |
2572 | ||
2573 | /* Sort an array of overlays by priority. The array is modified in place. | |
2574 | The return value is the new size; this may be smaller than the original | |
2575 | size if some of the overlays were invalid or were window-specific. */ | |
2576 | int | |
2577 | sort_overlays (overlay_vec, noverlays, w) | |
2578 | Lisp_Object *overlay_vec; | |
2579 | int noverlays; | |
2580 | struct window *w; | |
2581 | { | |
2582 | int i, j; | |
2583 | struct sortvec *sortvec; | |
2584 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2585 | ||
2586 | /* Put the valid and relevant overlays into sortvec. */ | |
2587 | ||
2588 | for (i = 0, j = 0; i < noverlays; i++) | |
2589 | { | |
0fa767e7 | 2590 | Lisp_Object tem; |
c99fc30f | 2591 | Lisp_Object overlay; |
5985d248 | 2592 | |
c99fc30f | 2593 | overlay = overlay_vec[i]; |
5985d248 KH |
2594 | if (OVERLAY_VALID (overlay) |
2595 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2596 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2597 | { | |
0fa767e7 KH |
2598 | /* If we're interested in a specific window, then ignore |
2599 | overlays that are limited to some other window. */ | |
2600 | if (w) | |
5985d248 | 2601 | { |
0fa767e7 KH |
2602 | Lisp_Object window; |
2603 | ||
2604 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2605 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2606 | continue; |
5985d248 | 2607 | } |
0fa767e7 KH |
2608 | |
2609 | /* This overlay is good and counts: put it into sortvec. */ | |
2610 | sortvec[j].overlay = overlay; | |
2611 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2612 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2613 | tem = Foverlay_get (overlay, Qpriority); | |
2614 | if (INTEGERP (tem)) | |
2615 | sortvec[j].priority = XINT (tem); | |
2616 | else | |
2617 | sortvec[j].priority = 0; | |
2618 | j++; | |
5985d248 KH |
2619 | } |
2620 | } | |
2621 | noverlays = j; | |
2622 | ||
2623 | /* Sort the overlays into the proper order: increasing priority. */ | |
2624 | ||
2625 | if (noverlays > 1) | |
2626 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2627 | ||
2628 | for (i = 0; i < noverlays; i++) | |
2629 | overlay_vec[i] = sortvec[i].overlay; | |
2630 | return (noverlays); | |
2631 | } | |
2632 | \f | |
bbbe9545 KH |
2633 | struct sortstr |
2634 | { | |
cb26008f | 2635 | Lisp_Object string, string2; |
bbbe9545 KH |
2636 | int size; |
2637 | int priority; | |
2638 | }; | |
2639 | ||
e8185fa8 KH |
2640 | struct sortstrlist |
2641 | { | |
2642 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2643 | int size; /* Allocated length of that array. */ | |
2644 | int used; /* How much of the array is currently in use. */ | |
2645 | int bytes; /* Total length of the strings in buf. */ | |
2646 | }; | |
2647 | ||
2648 | /* Buffers for storing information about the overlays touching a given | |
2649 | position. These could be automatic variables in overlay_strings, but | |
2650 | it's more efficient to hold onto the memory instead of repeatedly | |
2651 | allocating and freeing it. */ | |
2652 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2653 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2654 | |
2655 | /* Allocated length of overlay_str_buf. */ | |
2656 | static int overlay_str_len; | |
2657 | ||
bbbe9545 KH |
2658 | /* A comparison function suitable for passing to qsort. */ |
2659 | static int | |
2660 | cmp_for_strings (as1, as2) | |
2661 | char *as1, *as2; | |
2662 | { | |
2663 | struct sortstr *s1 = (struct sortstr *)as1; | |
2664 | struct sortstr *s2 = (struct sortstr *)as2; | |
2665 | if (s1->size != s2->size) | |
2666 | return s2->size - s1->size; | |
2667 | if (s1->priority != s2->priority) | |
2668 | return s1->priority - s2->priority; | |
2669 | return 0; | |
2670 | } | |
2671 | ||
e8185fa8 | 2672 | static void |
cb26008f | 2673 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2674 | struct sortstrlist *ssl; |
cb26008f | 2675 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2676 | int size; |
2677 | { | |
43d27a72 RS |
2678 | int nbytes; |
2679 | ||
e8185fa8 KH |
2680 | if (ssl->used == ssl->size) |
2681 | { | |
2682 | if (ssl->buf) | |
2683 | ssl->size *= 2; | |
2684 | else | |
2685 | ssl->size = 5; | |
2686 | ssl->buf = ((struct sortstr *) | |
2687 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2688 | } | |
2689 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2690 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2691 | ssl->buf[ssl->used].size = size; |
2692 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2693 | ssl->used++; | |
43d27a72 RS |
2694 | |
2695 | if (NILP (current_buffer->enable_multibyte_characters)) | |
2696 | nbytes = XSTRING (str)->size; | |
2697 | else if (! STRING_MULTIBYTE (str)) | |
2698 | nbytes = count_size_as_multibyte (XSTRING (str)->data, | |
fc932ac6 | 2699 | STRING_BYTES (XSTRING (str))); |
43d27a72 | 2700 | else |
fc932ac6 | 2701 | nbytes = STRING_BYTES (XSTRING (str)); |
43d27a72 RS |
2702 | |
2703 | ssl->bytes += nbytes; | |
2704 | ||
cb26008f | 2705 | if (STRINGP (str2)) |
43d27a72 RS |
2706 | { |
2707 | if (NILP (current_buffer->enable_multibyte_characters)) | |
2708 | nbytes = XSTRING (str2)->size; | |
2709 | else if (! STRING_MULTIBYTE (str2)) | |
2710 | nbytes = count_size_as_multibyte (XSTRING (str2)->data, | |
fc932ac6 | 2711 | STRING_BYTES (XSTRING (str2))); |
43d27a72 | 2712 | else |
fc932ac6 | 2713 | nbytes = STRING_BYTES (XSTRING (str2)); |
43d27a72 RS |
2714 | |
2715 | ssl->bytes += nbytes; | |
2716 | } | |
e8185fa8 | 2717 | } |
bbbe9545 KH |
2718 | |
2719 | /* Return the concatenation of the strings associated with overlays that | |
2720 | begin or end at POS, ignoring overlays that are specific to a window | |
2721 | other than W. The strings are concatenated in the appropriate order: | |
2722 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
2723 | lower. Normally all of the after-strings come first, but zero-sized |
2724 | overlays have their after-strings ride along with the before-strings | |
2725 | because it would look strange to print them inside-out. | |
2726 | ||
2727 | Returns the string length, and stores the contents indirectly through | |
2728 | PSTR, if that variable is non-null. The string may be overwritten by | |
2729 | subsequent calls. */ | |
6b5d3b89 | 2730 | |
bbbe9545 KH |
2731 | int |
2732 | overlay_strings (pos, w, pstr) | |
2733 | int pos; | |
2734 | struct window *w; | |
6b5d3b89 | 2735 | unsigned char **pstr; |
bbbe9545 | 2736 | { |
e8185fa8 | 2737 | Lisp_Object ov, overlay, window, str; |
bbbe9545 | 2738 | int startpos, endpos; |
43d27a72 | 2739 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 2740 | |
e8185fa8 KH |
2741 | overlay_heads.used = overlay_heads.bytes = 0; |
2742 | overlay_tails.used = overlay_tails.bytes = 0; | |
7539e11f | 2743 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCDR (ov)) |
bbbe9545 | 2744 | { |
7539e11f | 2745 | overlay = XCAR (ov); |
bbbe9545 KH |
2746 | if (!OVERLAYP (overlay)) |
2747 | abort (); | |
2748 | ||
2749 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2750 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2751 | if (endpos < pos) | |
2752 | break; | |
2753 | if (endpos != pos && startpos != pos) | |
2754 | continue; | |
2755 | window = Foverlay_get (overlay, Qwindow); | |
2756 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2757 | continue; | |
e8185fa8 KH |
2758 | if (startpos == pos |
2759 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2760 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2761 | (startpos == endpos |
2762 | ? Foverlay_get (overlay, Qafter_string) | |
2763 | : Qnil), | |
2764 | Foverlay_get (overlay, Qpriority), | |
2765 | endpos - startpos); | |
2766 | else if (endpos == pos | |
2767 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2768 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2769 | Foverlay_get (overlay, Qpriority), |
2770 | endpos - startpos); | |
bbbe9545 | 2771 | } |
7539e11f | 2772 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCDR (ov)) |
bbbe9545 | 2773 | { |
7539e11f | 2774 | overlay = XCAR (ov); |
bbbe9545 KH |
2775 | if (!OVERLAYP (overlay)) |
2776 | abort (); | |
2777 | ||
2778 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2779 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2780 | if (startpos > pos) | |
2781 | break; | |
e8185fa8 KH |
2782 | if (endpos != pos && startpos != pos) |
2783 | continue; | |
2784 | window = Foverlay_get (overlay, Qwindow); | |
2785 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2786 | continue; | |
e8185fa8 KH |
2787 | if (startpos == pos |
2788 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2789 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2790 | (startpos == endpos |
2791 | ? Foverlay_get (overlay, Qafter_string) | |
2792 | : Qnil), | |
2793 | Foverlay_get (overlay, Qpriority), | |
2794 | endpos - startpos); | |
2795 | else if (endpos == pos | |
2796 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2797 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2798 | Foverlay_get (overlay, Qpriority), |
2799 | endpos - startpos); | |
bbbe9545 | 2800 | } |
e8185fa8 KH |
2801 | if (overlay_tails.used > 1) |
2802 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
2803 | cmp_for_strings); | |
2804 | if (overlay_heads.used > 1) | |
2805 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
2806 | cmp_for_strings); | |
2807 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 2808 | { |
e8185fa8 | 2809 | Lisp_Object tem; |
bbbe9545 | 2810 | int i; |
9f4d7cde | 2811 | unsigned char *p; |
e8185fa8 | 2812 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
2813 | |
2814 | if (total > overlay_str_len) | |
9f4d7cde RS |
2815 | { |
2816 | overlay_str_len = total; | |
2817 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
2818 | total); | |
2819 | } | |
bbbe9545 | 2820 | p = overlay_str_buf; |
e8185fa8 | 2821 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 2822 | { |
43d27a72 | 2823 | int nbytes; |
e8185fa8 | 2824 | tem = overlay_tails.buf[i].string; |
fc932ac6 RS |
2825 | nbytes = copy_text (XSTRING (tem)->data, p, |
2826 | STRING_BYTES (XSTRING (tem)), | |
43d27a72 RS |
2827 | STRING_MULTIBYTE (tem), multibyte); |
2828 | p += nbytes; | |
bbbe9545 | 2829 | } |
e8185fa8 | 2830 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 2831 | { |
43d27a72 | 2832 | int nbytes; |
e8185fa8 | 2833 | tem = overlay_heads.buf[i].string; |
fc932ac6 RS |
2834 | nbytes = copy_text (XSTRING (tem)->data, p, |
2835 | STRING_BYTES (XSTRING (tem)), | |
43d27a72 RS |
2836 | STRING_MULTIBYTE (tem), multibyte); |
2837 | p += nbytes; | |
cb26008f KH |
2838 | tem = overlay_heads.buf[i].string2; |
2839 | if (STRINGP (tem)) | |
2840 | { | |
43d27a72 | 2841 | nbytes = copy_text (XSTRING (tem)->data, p, |
fc932ac6 | 2842 | STRING_BYTES (XSTRING (tem)), |
43d27a72 RS |
2843 | STRING_MULTIBYTE (tem), multibyte); |
2844 | p += nbytes; | |
cb26008f | 2845 | } |
bbbe9545 | 2846 | } |
cb26008f KH |
2847 | if (p != overlay_str_buf + total) |
2848 | abort (); | |
bbbe9545 KH |
2849 | if (pstr) |
2850 | *pstr = overlay_str_buf; | |
e8185fa8 | 2851 | return total; |
bbbe9545 | 2852 | } |
e8185fa8 | 2853 | return 0; |
bbbe9545 KH |
2854 | } |
2855 | \f | |
5c4f68f1 | 2856 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 2857 | |
2eec3b4e | 2858 | void |
5c4f68f1 JB |
2859 | recenter_overlay_lists (buf, pos) |
2860 | struct buffer *buf; | |
2eec3b4e RS |
2861 | int pos; |
2862 | { | |
2863 | Lisp_Object overlay, tail, next, prev, beg, end; | |
2864 | ||
2865 | /* See if anything in overlays_before should move to overlays_after. */ | |
2866 | ||
2867 | /* We don't strictly need prev in this loop; it should always be nil. | |
2868 | But we use it for symmetry and in case that should cease to be true | |
2869 | with some future change. */ | |
2870 | prev = Qnil; | |
5c4f68f1 | 2871 | for (tail = buf->overlays_before; |
2eec3b4e RS |
2872 | CONSP (tail); |
2873 | prev = tail, tail = next) | |
1ab256cb | 2874 | { |
7539e11f KR |
2875 | next = XCDR (tail); |
2876 | overlay = XCAR (tail); | |
2eec3b4e RS |
2877 | |
2878 | /* If the overlay is not valid, get rid of it. */ | |
2879 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2880 | #if 1 |
2881 | abort (); | |
2882 | #else | |
2eec3b4e RS |
2883 | { |
2884 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2885 | if (!NILP (prev)) | |
7539e11f | 2886 | XCDR (prev) = next; |
2eec3b4e | 2887 | else |
5c4f68f1 | 2888 | buf->overlays_before = next; |
2eec3b4e RS |
2889 | tail = prev; |
2890 | continue; | |
2891 | } | |
52f8ec73 | 2892 | #endif |
1ab256cb | 2893 | |
2eec3b4e RS |
2894 | beg = OVERLAY_START (overlay); |
2895 | end = OVERLAY_END (overlay); | |
1ab256cb | 2896 | |
2eec3b4e | 2897 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 2898 | { |
2eec3b4e RS |
2899 | /* OVERLAY needs to be moved. */ |
2900 | int where = OVERLAY_POSITION (beg); | |
2901 | Lisp_Object other, other_prev; | |
2902 | ||
2903 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2904 | if (!NILP (prev)) | |
7539e11f | 2905 | XCDR (prev) = next; |
2eec3b4e | 2906 | else |
5c4f68f1 | 2907 | buf->overlays_before = next; |
2eec3b4e RS |
2908 | |
2909 | /* Search thru overlays_after for where to put it. */ | |
2910 | other_prev = Qnil; | |
5c4f68f1 | 2911 | for (other = buf->overlays_after; |
2eec3b4e | 2912 | CONSP (other); |
7539e11f | 2913 | other_prev = other, other = XCDR (other)) |
1ab256cb | 2914 | { |
6af718a4 | 2915 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 2916 | |
7539e11f | 2917 | otheroverlay = XCAR (other); |
2eec3b4e | 2918 | if (! OVERLAY_VALID (otheroverlay)) |
52f8ec73 | 2919 | abort (); |
2eec3b4e RS |
2920 | |
2921 | otherbeg = OVERLAY_START (otheroverlay); | |
2922 | if (OVERLAY_POSITION (otherbeg) >= where) | |
2923 | break; | |
1ab256cb | 2924 | } |
2eec3b4e RS |
2925 | |
2926 | /* Add TAIL to overlays_after before OTHER. */ | |
7539e11f | 2927 | XCDR (tail) = other; |
2eec3b4e | 2928 | if (!NILP (other_prev)) |
7539e11f | 2929 | XCDR (other_prev) = tail; |
1ab256cb | 2930 | else |
5c4f68f1 | 2931 | buf->overlays_after = tail; |
2eec3b4e | 2932 | tail = prev; |
1ab256cb | 2933 | } |
2eec3b4e RS |
2934 | else |
2935 | /* We've reached the things that should stay in overlays_before. | |
2936 | All the rest of overlays_before must end even earlier, | |
2937 | so stop now. */ | |
2938 | break; | |
2939 | } | |
2940 | ||
2941 | /* See if anything in overlays_after should be in overlays_before. */ | |
2942 | prev = Qnil; | |
5c4f68f1 | 2943 | for (tail = buf->overlays_after; |
2eec3b4e RS |
2944 | CONSP (tail); |
2945 | prev = tail, tail = next) | |
2946 | { | |
7539e11f KR |
2947 | next = XCDR (tail); |
2948 | overlay = XCAR (tail); | |
2eec3b4e RS |
2949 | |
2950 | /* If the overlay is not valid, get rid of it. */ | |
2951 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2952 | #if 1 |
2953 | abort (); | |
2954 | #else | |
2eec3b4e RS |
2955 | { |
2956 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2957 | if (!NILP (prev)) | |
7539e11f | 2958 | XCDR (prev) = next; |
2eec3b4e | 2959 | else |
5c4f68f1 | 2960 | buf->overlays_after = next; |
2eec3b4e RS |
2961 | tail = prev; |
2962 | continue; | |
2963 | } | |
52f8ec73 | 2964 | #endif |
2eec3b4e RS |
2965 | |
2966 | beg = OVERLAY_START (overlay); | |
2967 | end = OVERLAY_END (overlay); | |
2968 | ||
2969 | /* Stop looking, when we know that nothing further | |
2970 | can possibly end before POS. */ | |
2971 | if (OVERLAY_POSITION (beg) > pos) | |
2972 | break; | |
2973 | ||
2974 | if (OVERLAY_POSITION (end) <= pos) | |
2975 | { | |
2976 | /* OVERLAY needs to be moved. */ | |
2977 | int where = OVERLAY_POSITION (end); | |
2978 | Lisp_Object other, other_prev; | |
2979 | ||
2980 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2981 | if (!NILP (prev)) | |
7539e11f | 2982 | XCDR (prev) = next; |
2eec3b4e | 2983 | else |
5c4f68f1 | 2984 | buf->overlays_after = next; |
2eec3b4e RS |
2985 | |
2986 | /* Search thru overlays_before for where to put it. */ | |
2987 | other_prev = Qnil; | |
5c4f68f1 | 2988 | for (other = buf->overlays_before; |
2eec3b4e | 2989 | CONSP (other); |
7539e11f | 2990 | other_prev = other, other = XCDR (other)) |
2eec3b4e RS |
2991 | { |
2992 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 2993 | |
7539e11f | 2994 | otheroverlay = XCAR (other); |
2eec3b4e | 2995 | if (! OVERLAY_VALID (otheroverlay)) |
52f8ec73 | 2996 | abort (); |
2eec3b4e RS |
2997 | |
2998 | otherend = OVERLAY_END (otheroverlay); | |
2999 | if (OVERLAY_POSITION (otherend) <= where) | |
3000 | break; | |
3001 | } | |
3002 | ||
3003 | /* Add TAIL to overlays_before before OTHER. */ | |
7539e11f | 3004 | XCDR (tail) = other; |
2eec3b4e | 3005 | if (!NILP (other_prev)) |
7539e11f | 3006 | XCDR (other_prev) = tail; |
2eec3b4e | 3007 | else |
5c4f68f1 | 3008 | buf->overlays_before = tail; |
2eec3b4e RS |
3009 | tail = prev; |
3010 | } | |
3011 | } | |
3012 | ||
8d7a4592 | 3013 | XSETFASTINT (buf->overlay_center, pos); |
2eec3b4e | 3014 | } |
2b1bdf65 | 3015 | |
423cdb46 KH |
3016 | void |
3017 | adjust_overlays_for_insert (pos, length) | |
3018 | int pos; | |
3019 | int length; | |
3020 | { | |
3021 | /* After an insertion, the lists are still sorted properly, | |
3022 | but we may need to update the value of the overlay center. */ | |
3023 | if (XFASTINT (current_buffer->overlay_center) >= pos) | |
3024 | XSETFASTINT (current_buffer->overlay_center, | |
3025 | XFASTINT (current_buffer->overlay_center) + length); | |
3026 | } | |
3027 | ||
3028 | void | |
3029 | adjust_overlays_for_delete (pos, length) | |
3030 | int pos; | |
3031 | int length; | |
3032 | { | |
3033 | if (XFASTINT (current_buffer->overlay_center) < pos) | |
3034 | /* The deletion was to our right. No change needed; the before- and | |
3035 | after-lists are still consistent. */ | |
3036 | ; | |
3037 | else if (XFASTINT (current_buffer->overlay_center) > pos + length) | |
3038 | /* The deletion was to our left. We need to adjust the center value | |
3039 | to account for the change in position, but the lists are consistent | |
3040 | given the new value. */ | |
3041 | XSETFASTINT (current_buffer->overlay_center, | |
3042 | XFASTINT (current_buffer->overlay_center) - length); | |
3043 | else | |
3044 | /* We're right in the middle. There might be things on the after-list | |
3045 | that now belong on the before-list. Recentering will move them, | |
3046 | and also update the center point. */ | |
3047 | recenter_overlay_lists (current_buffer, pos); | |
3048 | } | |
3049 | ||
2b1bdf65 KH |
3050 | /* Fix up overlays that were garbled as a result of permuting markers |
3051 | in the range START through END. Any overlay with at least one | |
3052 | endpoint in this range will need to be unlinked from the overlay | |
3053 | list and reinserted in its proper place. | |
3054 | Such an overlay might even have negative size at this point. | |
3055 | If so, we'll reverse the endpoints. Can you think of anything | |
3056 | better to do in this situation? */ | |
3057 | void | |
3058 | fix_overlays_in_range (start, end) | |
3059 | register int start, end; | |
3060 | { | |
6af718a4 | 3061 | Lisp_Object overlay; |
2b1bdf65 KH |
3062 | Lisp_Object before_list, after_list; |
3063 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; | |
3064 | int startpos, endpos; | |
3065 | ||
3066 | /* This algorithm shifts links around instead of consing and GCing. | |
3067 | The loop invariant is that before_list (resp. after_list) is a | |
3068 | well-formed list except that its last element, the one that | |
3069 | *pbefore (resp. *pafter) points to, is still uninitialized. | |
3070 | So it's not a bug that before_list isn't initialized, although | |
3071 | it may look strange. */ | |
3072 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) | |
3073 | { | |
7539e11f | 3074 | overlay = XCAR (*ptail); |
2b1bdf65 KH |
3075 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3076 | if (endpos < start) | |
3077 | break; | |
3078 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3079 | if (endpos < end | |
3080 | || (startpos >= start && startpos < end)) | |
3081 | { | |
3082 | /* If the overlay is backwards, fix that now. */ | |
3083 | if (startpos > endpos) | |
3084 | { | |
3085 | int tem; | |
2c99f3ea RS |
3086 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
3087 | Qnil); | |
3088 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), | |
3089 | Qnil); | |
2b1bdf65 KH |
3090 | tem = startpos; startpos = endpos; endpos = tem; |
3091 | } | |
3092 | /* Add it to the end of the wrong list. Later on, | |
3093 | recenter_overlay_lists will move it to the right place. */ | |
3094 | if (endpos < XINT (current_buffer->overlay_center)) | |
3095 | { | |
3096 | *pafter = *ptail; | |
7539e11f | 3097 | pafter = &XCDR (*ptail); |
2b1bdf65 KH |
3098 | } |
3099 | else | |
3100 | { | |
3101 | *pbefore = *ptail; | |
7539e11f | 3102 | pbefore = &XCDR (*ptail); |
2b1bdf65 | 3103 | } |
7539e11f | 3104 | *ptail = XCDR (*ptail); |
2b1bdf65 KH |
3105 | } |
3106 | else | |
7539e11f | 3107 | ptail = &XCDR (*ptail); |
2b1bdf65 KH |
3108 | } |
3109 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) | |
3110 | { | |
7539e11f | 3111 | overlay = XCAR (*ptail); |
2b1bdf65 KH |
3112 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3113 | if (startpos >= end) | |
3114 | break; | |
3115 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3116 | if (startpos >= start | |
3117 | || (endpos >= start && endpos < end)) | |
3118 | { | |
3119 | if (startpos > endpos) | |
3120 | { | |
3121 | int tem; | |
2c99f3ea RS |
3122 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
3123 | Qnil); | |
3124 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), | |
3125 | Qnil); | |
2b1bdf65 KH |
3126 | tem = startpos; startpos = endpos; endpos = tem; |
3127 | } | |
3128 | if (endpos < XINT (current_buffer->overlay_center)) | |
3129 | { | |
3130 | *pafter = *ptail; | |
7539e11f | 3131 | pafter = &XCDR (*ptail); |
2b1bdf65 KH |
3132 | } |
3133 | else | |
3134 | { | |
3135 | *pbefore = *ptail; | |
7539e11f | 3136 | pbefore = &XCDR (*ptail); |
2b1bdf65 | 3137 | } |
7539e11f | 3138 | *ptail = XCDR (*ptail); |
2b1bdf65 KH |
3139 | } |
3140 | else | |
7539e11f | 3141 | ptail = &XCDR (*ptail); |
2b1bdf65 KH |
3142 | } |
3143 | ||
3144 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3145 | and let the recenter function make it sane again. */ | |
3146 | *pbefore = current_buffer->overlays_before; | |
3147 | current_buffer->overlays_before = before_list; | |
3148 | recenter_overlay_lists (current_buffer, | |
3149 | XINT (current_buffer->overlay_center)); | |
3150 | ||
3151 | *pafter = current_buffer->overlays_after; | |
3152 | current_buffer->overlays_after = after_list; | |
3153 | recenter_overlay_lists (current_buffer, | |
3154 | XINT (current_buffer->overlay_center)); | |
3155 | } | |
3b06f880 KH |
3156 | |
3157 | /* We have two types of overlay: the one whose ending marker is | |
3158 | after-insertion-marker (this is the usual case) and the one whose | |
3159 | ending marker is before-insertion-marker. When `overlays_before' | |
3160 | contains overlays of the latter type and the former type in this | |
3161 | order and both overlays end at inserting position, inserting a text | |
3162 | increases only the ending marker of the latter type, which results | |
3163 | in incorrect ordering of `overlays_before'. | |
3164 | ||
3165 | This function fixes ordering of overlays in the slot | |
3166 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3167 | was at PREV, and now is at POS. */ | |
3168 | ||
01136e9b | 3169 | void |
3b06f880 KH |
3170 | fix_overlays_before (bp, prev, pos) |
3171 | struct buffer *bp; | |
3172 | int prev, pos; | |
3173 | { | |
3174 | Lisp_Object *tailp = &bp->overlays_before; | |
3175 | Lisp_Object *right_place; | |
3176 | int end; | |
3177 | ||
3178 | /* After the insertion, the several overlays may be in incorrect | |
3179 | order. The possibility is that, in the list `overlays_before', | |
3180 | an overlay which ends at POS appears after an overlay which ends | |
3181 | at PREV. Since POS is greater than PREV, we must fix the | |
3182 | ordering of these overlays, by moving overlays ends at POS before | |
3183 | the overlays ends at PREV. */ | |
3184 | ||
3185 | /* At first, find a place where disordered overlays should be linked | |
3186 | in. It is where an overlay which end before POS exists. (i.e. an | |
3187 | overlay whose ending marker is after-insertion-marker if disorder | |
3188 | exists). */ | |
3189 | while (!NILP (*tailp) | |
7539e11f | 3190 | && ((end = OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp)))) |
3b06f880 | 3191 | >= pos)) |
7539e11f | 3192 | tailp = &XCDR (*tailp); |
3b06f880 KH |
3193 | |
3194 | /* If we don't find such an overlay, | |
3195 | or the found one ends before PREV, | |
3196 | or the found one is the last one in the list, | |
3197 | we don't have to fix anything. */ | |
3198 | if (NILP (*tailp) | |
3199 | || end < prev | |
7539e11f | 3200 | || NILP (XCDR (*tailp))) |
3b06f880 KH |
3201 | return; |
3202 | ||
3203 | right_place = tailp; | |
7539e11f | 3204 | tailp = &XCDR (*tailp); |
3b06f880 KH |
3205 | |
3206 | /* Now, end position of overlays in the list *TAILP should be before | |
3207 | or equal to PREV. In the loop, an overlay which ends at POS is | |
3208 | moved ahead to the place pointed by RIGHT_PLACE. If we found an | |
3209 | overlay which ends before PREV, the remaining overlays are in | |
3210 | correct order. */ | |
3211 | while (!NILP (*tailp)) | |
3212 | { | |
7539e11f | 3213 | end = OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp))); |
3b06f880 KH |
3214 | |
3215 | if (end == pos) | |
3216 | { /* This overlay is disordered. */ | |
3217 | Lisp_Object found = *tailp; | |
3218 | ||
3219 | /* Unlink the found overlay. */ | |
7539e11f | 3220 | *tailp = XCDR (found); |
3b06f880 | 3221 | /* Move an overlay at RIGHT_PLACE to the next of the found one. */ |
7539e11f | 3222 | XCDR (found) = *right_place; |
3b06f880 KH |
3223 | /* Link it into the right place. */ |
3224 | *right_place = found; | |
3225 | } | |
3226 | else if (end == prev) | |
7539e11f | 3227 | tailp = &XCDR (*tailp); |
3b06f880 KH |
3228 | else /* No more disordered overlay. */ |
3229 | break; | |
3230 | } | |
3231 | } | |
2eec3b4e | 3232 | \f |
52f8ec73 JB |
3233 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
3234 | "Return t if OBJECT is an overlay.") | |
3235 | (object) | |
3236 | Lisp_Object object; | |
3237 | { | |
3238 | return (OVERLAYP (object) ? Qt : Qnil); | |
3239 | } | |
3240 | ||
acac2700 | 3241 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
5c4f68f1 JB |
3242 | "Create a new overlay with range BEG to END in BUFFER.\n\ |
3243 | If omitted, BUFFER defaults to the current buffer.\n\ | |
acac2700 RS |
3244 | BEG and END may be integers or markers.\n\ |
3245 | The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\ | |
3246 | front delimiter advance when text is inserted there.\n\ | |
3247 | The fifth arg REAR-ADVANCE, if non-nil, makes the\n\ | |
3248 | rear delimiter advance when text is inserted there.") | |
3249 | (beg, end, buffer, front_advance, rear_advance) | |
5c4f68f1 | 3250 | Lisp_Object beg, end, buffer; |
acac2700 | 3251 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3252 | { |
3253 | Lisp_Object overlay; | |
5c4f68f1 | 3254 | struct buffer *b; |
2eec3b4e | 3255 | |
5c4f68f1 | 3256 | if (NILP (buffer)) |
67180c6a | 3257 | XSETBUFFER (buffer, current_buffer); |
883047b9 JB |
3258 | else |
3259 | CHECK_BUFFER (buffer, 2); | |
3260 | if (MARKERP (beg) | |
3261 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3262 | error ("Marker points into wrong buffer"); | |
3263 | if (MARKERP (end) | |
3264 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3265 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3266 | |
883047b9 JB |
3267 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
3268 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 3269 | |
883047b9 | 3270 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3271 | { |
c99fc30f KH |
3272 | Lisp_Object temp; |
3273 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3274 | } |
883047b9 JB |
3275 | |
3276 | b = XBUFFER (buffer); | |
3277 | ||
3278 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3279 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3280 | |
acac2700 RS |
3281 | if (!NILP (front_advance)) |
3282 | XMARKER (beg)->insertion_type = 1; | |
3283 | if (!NILP (rear_advance)) | |
3284 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3285 | |
48e2e3ba | 3286 | overlay = allocate_misc (); |
89ca3e1b | 3287 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3288 | XOVERLAY (overlay)->start = beg; |
3289 | XOVERLAY (overlay)->end = end; | |
3290 | XOVERLAY (overlay)->plist = Qnil; | |
2eec3b4e RS |
3291 | |
3292 | /* Put the new overlay on the wrong list. */ | |
3293 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
3294 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
3295 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 3296 | else |
5c4f68f1 | 3297 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
3298 | |
3299 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 3300 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 3301 | |
b61982dd JB |
3302 | /* We don't need to redisplay the region covered by the overlay, because |
3303 | the overlay has no properties at the moment. */ | |
3304 | ||
2eec3b4e RS |
3305 | return overlay; |
3306 | } | |
876aa27c RS |
3307 | \f |
3308 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3309 | ||
3310 | static void | |
3311 | modify_overlay (buf, start, end) | |
3312 | struct buffer *buf; | |
3313 | int start, end; | |
3314 | { | |
3315 | if (start == end) | |
3316 | return; | |
3317 | ||
3318 | if (start > end) | |
3319 | { | |
3320 | int temp = start; | |
3321 | start = end; end = temp; | |
3322 | } | |
3323 | ||
481b5054 GM |
3324 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
3325 | ||
876aa27c RS |
3326 | /* If this is a buffer not in the selected window, |
3327 | we must do other windows. */ | |
3328 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3329 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3330 | /* If multiple windows show this buffer, we must do other windows. */ |
3331 | else if (buffer_shared > 1) | |
3332 | windows_or_buffers_changed = 1; | |
876aa27c | 3333 | |
d8b9150f | 3334 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3335 | } |
2eec3b4e | 3336 | |
876aa27c | 3337 | \f\f |
2e34157c RS |
3338 | Lisp_Object Fdelete_overlay (); |
3339 | ||
5c4f68f1 JB |
3340 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
3341 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
3342 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
3343 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
3344 | buffer.") | |
5c4f68f1 JB |
3345 | (overlay, beg, end, buffer) |
3346 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 3347 | { |
0a4469c9 RS |
3348 | struct buffer *b, *ob; |
3349 | Lisp_Object obuffer; | |
3350 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 3351 | |
52f8ec73 | 3352 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
3353 | if (NILP (buffer)) |
3354 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3355 | if (NILP (buffer)) |
67180c6a | 3356 | XSETBUFFER (buffer, current_buffer); |
5c4f68f1 | 3357 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
3358 | |
3359 | if (MARKERP (beg) | |
3360 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3361 | error ("Marker points into wrong buffer"); | |
3362 | if (MARKERP (end) | |
3363 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3364 | error ("Marker points into wrong buffer"); | |
3365 | ||
b61982dd JB |
3366 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
3367 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
3368 | ||
9d7608b7 KH |
3369 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3370 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3371 | |
b61982dd JB |
3372 | if (XINT (beg) > XINT (end)) |
3373 | { | |
c99fc30f KH |
3374 | Lisp_Object temp; |
3375 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3376 | } |
3377 | ||
9d7608b7 KH |
3378 | specbind (Qinhibit_quit, Qt); |
3379 | ||
0a4469c9 | 3380 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3381 | b = XBUFFER (buffer); |
8801a864 | 3382 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3383 | |
c82ed728 | 3384 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3385 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3386 | { |
3387 | /* Redisplay where the overlay was. */ | |
3388 | if (!NILP (obuffer)) | |
3389 | { | |
2e34157c RS |
3390 | int o_beg; |
3391 | int o_end; | |
50760c4a | 3392 | |
80509f2f RS |
3393 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3394 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3395 | |
2e34157c | 3396 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3397 | } |
3398 | ||
3399 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3400 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3401 | } |
c82ed728 JB |
3402 | else |
3403 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3404 | { | |
2e34157c | 3405 | int o_beg, o_end; |
c82ed728 | 3406 | |
80509f2f RS |
3407 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3408 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3409 | |
2e34157c RS |
3410 | if (o_beg == XINT (beg)) |
3411 | modify_overlay (b, o_end, XINT (end)); | |
3412 | else if (o_end == XINT (end)) | |
3413 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3414 | else |
3415 | { | |
2e34157c RS |
3416 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3417 | if (XINT (end) > o_end) o_end = XINT (end); | |
3418 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3419 | } |
3420 | } | |
b61982dd | 3421 | |
0a4469c9 RS |
3422 | if (!NILP (obuffer)) |
3423 | { | |
3424 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
3425 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
3426 | } | |
5c4f68f1 JB |
3427 | |
3428 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3429 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
3430 | |
3431 | /* Put the overlay on the wrong list. */ | |
3432 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
3433 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
3434 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 3435 | else |
5c4f68f1 | 3436 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
3437 | |
3438 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 3439 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 3440 | |
0a4469c9 | 3441 | return unbind_to (count, overlay); |
2eec3b4e RS |
3442 | } |
3443 | ||
3444 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 3445 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 3446 | (overlay) |
5c4f68f1 | 3447 | Lisp_Object overlay; |
2eec3b4e | 3448 | { |
0a4469c9 | 3449 | Lisp_Object buffer; |
5c4f68f1 | 3450 | struct buffer *b; |
0a4469c9 | 3451 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 3452 | |
52f8ec73 JB |
3453 | CHECK_OVERLAY (overlay, 0); |
3454 | ||
0a4469c9 RS |
3455 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3456 | if (NILP (buffer)) | |
3457 | return Qnil; | |
3458 | ||
3459 | b = XBUFFER (buffer); | |
3460 | ||
3461 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
3462 | |
3463 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
3464 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
3465 | ||
876aa27c | 3466 | modify_overlay (b, |
8231a9aa RS |
3467 | marker_position (OVERLAY_START (overlay)), |
3468 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 3469 | |
3ece337a JB |
3470 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3471 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3472 | ||
0a4469c9 | 3473 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3474 | } |
3475 | \f | |
8ebafa8d JB |
3476 | /* Overlay dissection functions. */ |
3477 | ||
3478 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
3479 | "Return the position at which OVERLAY starts.") | |
3480 | (overlay) | |
3481 | Lisp_Object overlay; | |
3482 | { | |
3483 | CHECK_OVERLAY (overlay, 0); | |
3484 | ||
3485 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3486 | } | |
3487 | ||
3488 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
3489 | "Return the position at which OVERLAY ends.") | |
3490 | (overlay) | |
3491 | Lisp_Object overlay; | |
3492 | { | |
3493 | CHECK_OVERLAY (overlay, 0); | |
3494 | ||
3495 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3496 | } | |
3497 | ||
3498 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
3499 | "Return the buffer OVERLAY belongs to.") | |
3500 | (overlay) | |
3501 | Lisp_Object overlay; | |
3502 | { | |
3503 | CHECK_OVERLAY (overlay, 0); | |
3504 | ||
3505 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3506 | } | |
3507 | ||
3508 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
3509 | "Return a list of the properties on OVERLAY.\n\ | |
3510 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
3511 | OVERLAY.") | |
3512 | (overlay) | |
3513 | Lisp_Object overlay; | |
3514 | { | |
3515 | CHECK_OVERLAY (overlay, 0); | |
3516 | ||
48e2e3ba | 3517 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3518 | } |
3519 | ||
3520 | \f | |
2eec3b4e | 3521 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 3522 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
3523 | (pos) |
3524 | Lisp_Object pos; | |
3525 | { | |
3526 | int noverlays; | |
2eec3b4e RS |
3527 | Lisp_Object *overlay_vec; |
3528 | int len; | |
3529 | Lisp_Object result; | |
3530 | ||
3531 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3532 | ||
3533 | len = 10; | |
a9800ae8 | 3534 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3535 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3536 | ||
3537 | /* Put all the overlays we want in a vector in overlay_vec. | |
3538 | Store the length in len. */ | |
2a77a7d7 | 3539 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3540 | (int *) 0, (int *) 0, 0); |
2eec3b4e RS |
3541 | |
3542 | /* Make a list of them all. */ | |
3543 | result = Flist (noverlays, overlay_vec); | |
3544 | ||
9ac0d9e0 | 3545 | xfree (overlay_vec); |
2eec3b4e RS |
3546 | return result; |
3547 | } | |
3548 | ||
74514898 | 3549 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
2a3eeee7 RS |
3550 | "Return a list of the overlays that overlap the region BEG ... END.\n\ |
3551 | Overlap means that at least one character is contained within the overlay\n\ | |
3552 | and also contained within the specified region.\n\ | |
3553 | Empty overlays are included in the result if they are located at BEG\n\ | |
3554 | or between BEG and END.") | |
74514898 RS |
3555 | (beg, end) |
3556 | Lisp_Object beg, end; | |
3557 | { | |
3558 | int noverlays; | |
3559 | Lisp_Object *overlay_vec; | |
3560 | int len; | |
3561 | Lisp_Object result; | |
3562 | ||
3563 | CHECK_NUMBER_COERCE_MARKER (beg, 0); | |
3564 | CHECK_NUMBER_COERCE_MARKER (end, 0); | |
3565 | ||
3566 | len = 10; | |
3567 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3568 | ||
3569 | /* Put all the overlays we want in a vector in overlay_vec. | |
3570 | Store the length in len. */ | |
3571 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
3572 | (int *) 0, (int *) 0); | |
3573 | ||
3574 | /* Make a list of them all. */ | |
3575 | result = Flist (noverlays, overlay_vec); | |
3576 | ||
3577 | xfree (overlay_vec); | |
3578 | return result; | |
3579 | } | |
3580 | ||
2eec3b4e RS |
3581 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
3582 | 1, 1, 0, | |
bbe20e81 KH |
3583 | "Return the next position after POS where an overlay starts or ends.\n\ |
3584 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
3585 | (pos) |
3586 | Lisp_Object pos; | |
3587 | { | |
3588 | int noverlays; | |
3589 | int endpos; | |
3590 | Lisp_Object *overlay_vec; | |
3591 | int len; | |
2eec3b4e RS |
3592 | int i; |
3593 | ||
3594 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3595 | ||
3596 | len = 10; | |
3597 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3598 | ||
3599 | /* Put all the overlays we want in a vector in overlay_vec. | |
3600 | Store the length in len. | |
3601 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3602 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3603 | &endpos, (int *) 0, 1); |
2eec3b4e RS |
3604 | |
3605 | /* If any of these overlays ends before endpos, | |
3606 | use its ending point instead. */ | |
3607 | for (i = 0; i < noverlays; i++) | |
3608 | { | |
3609 | Lisp_Object oend; | |
3610 | int oendpos; | |
3611 | ||
3612 | oend = OVERLAY_END (overlay_vec[i]); | |
3613 | oendpos = OVERLAY_POSITION (oend); | |
3614 | if (oendpos < endpos) | |
3615 | endpos = oendpos; | |
1ab256cb RM |
3616 | } |
3617 | ||
9ac0d9e0 | 3618 | xfree (overlay_vec); |
2eec3b4e RS |
3619 | return make_number (endpos); |
3620 | } | |
239c932b RS |
3621 | |
3622 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
3623 | Sprevious_overlay_change, 1, 1, 0, | |
3624 | "Return the previous position before POS where an overlay starts or ends.\n\ | |
624bbdc4 | 3625 | If there are no more overlay boundaries before POS, return (point-min).") |
239c932b RS |
3626 | (pos) |
3627 | Lisp_Object pos; | |
3628 | { | |
3629 | int noverlays; | |
3630 | int prevpos; | |
3631 | Lisp_Object *overlay_vec; | |
3632 | int len; | |
239c932b RS |
3633 | |
3634 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3635 | ||
624bbdc4 RS |
3636 | /* At beginning of buffer, we know the answer; |
3637 | avoid bug subtracting 1 below. */ | |
3638 | if (XINT (pos) == BEGV) | |
3639 | return pos; | |
3640 | ||
017f0539 GM |
3641 | len = 10; |
3642 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3643 | ||
239c932b RS |
3644 | /* Put all the overlays we want in a vector in overlay_vec. |
3645 | Store the length in len. | |
daa1c109 | 3646 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 3647 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3648 | (int *) 0, &prevpos, 1); |
239c932b | 3649 | |
239c932b RS |
3650 | xfree (overlay_vec); |
3651 | return make_number (prevpos); | |
3652 | } | |
2eec3b4e RS |
3653 | \f |
3654 | /* These functions are for debugging overlays. */ | |
3655 | ||
3656 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
3657 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
3658 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 3659 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
3660 | Recentering overlays moves overlays between these lists.\n\ |
3661 | The lists you get are copies, so that changing them has no effect.\n\ | |
3662 | However, the overlays you get are the real objects that the buffer uses.") | |
3663 | () | |
3664 | { | |
3665 | Lisp_Object before, after; | |
3666 | before = current_buffer->overlays_before; | |
3667 | if (CONSP (before)) | |
3668 | before = Fcopy_sequence (before); | |
3669 | after = current_buffer->overlays_after; | |
3670 | if (CONSP (after)) | |
3671 | after = Fcopy_sequence (after); | |
3672 | ||
3673 | return Fcons (before, after); | |
3674 | } | |
3675 | ||
3676 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
3677 | "Recenter the overlays of the current buffer around position POS.") | |
3678 | (pos) | |
3679 | Lisp_Object pos; | |
3680 | { | |
3681 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3682 | ||
5c4f68f1 | 3683 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
3684 | return Qnil; |
3685 | } | |
3686 | \f | |
3687 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
a2428fa2 | 3688 | "Get the property of overlay OVERLAY with property name PROP.") |
2eec3b4e RS |
3689 | (overlay, prop) |
3690 | Lisp_Object overlay, prop; | |
3691 | { | |
cab4777e | 3692 | Lisp_Object plist, fallback; |
52f8ec73 JB |
3693 | |
3694 | CHECK_OVERLAY (overlay, 0); | |
3695 | ||
cab4777e RS |
3696 | fallback = Qnil; |
3697 | ||
48e2e3ba | 3698 | for (plist = XOVERLAY (overlay)->plist; |
7539e11f KR |
3699 | CONSP (plist) && CONSP (XCDR (plist)); |
3700 | plist = XCDR (XCDR (plist))) | |
2eec3b4e | 3701 | { |
7539e11f KR |
3702 | if (EQ (XCAR (plist), prop)) |
3703 | return XCAR (XCDR (plist)); | |
3704 | else if (EQ (XCAR (plist), Qcategory)) | |
cab4777e RS |
3705 | { |
3706 | Lisp_Object tem; | |
3707 | tem = Fcar (Fcdr (plist)); | |
3708 | if (SYMBOLP (tem)) | |
3709 | fallback = Fget (tem, prop); | |
3710 | } | |
2eec3b4e | 3711 | } |
52f8ec73 | 3712 | |
cab4777e | 3713 | return fallback; |
2eec3b4e RS |
3714 | } |
3715 | ||
3716 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
3717 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
3718 | (overlay, prop, value) | |
3719 | Lisp_Object overlay, prop, value; | |
3720 | { | |
48e2e3ba | 3721 | Lisp_Object tail, buffer; |
9d7608b7 | 3722 | int changed; |
2eec3b4e | 3723 | |
52f8ec73 | 3724 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 3725 | |
274a9425 RS |
3726 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3727 | ||
48e2e3ba | 3728 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
3729 | CONSP (tail) && CONSP (XCDR (tail)); |
3730 | tail = XCDR (XCDR (tail))) | |
3731 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 3732 | { |
7539e11f KR |
3733 | changed = !EQ (XCAR (XCDR (tail)), value); |
3734 | XCAR (XCDR (tail)) = value; | |
9d7608b7 | 3735 | goto found; |
274a9425 | 3736 | } |
9d7608b7 KH |
3737 | /* It wasn't in the list, so add it to the front. */ |
3738 | changed = !NILP (value); | |
48e2e3ba KH |
3739 | XOVERLAY (overlay)->plist |
3740 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
3741 | found: |
3742 | if (! NILP (buffer)) | |
3743 | { | |
3744 | if (changed) | |
876aa27c | 3745 | modify_overlay (XBUFFER (buffer), |
9d7608b7 KH |
3746 | marker_position (OVERLAY_START (overlay)), |
3747 | marker_position (OVERLAY_END (overlay))); | |
3748 | if (EQ (prop, Qevaporate) && ! NILP (value) | |
3749 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
3750 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
3751 | Fdelete_overlay (overlay); | |
3752 | } | |
2eec3b4e | 3753 | return value; |
1ab256cb RM |
3754 | } |
3755 | \f | |
9115729e KH |
3756 | /* Subroutine of report_overlay_modification. */ |
3757 | ||
3758 | /* Lisp vector holding overlay hook functions to call. | |
3759 | Vector elements come in pairs. | |
3760 | Each even-index element is a list of hook functions. | |
3761 | The following odd-index element is the overlay they came from. | |
3762 | ||
3763 | Before the buffer change, we fill in this vector | |
3764 | as we call overlay hook functions. | |
3765 | After the buffer change, we get the functions to call from this vector. | |
3766 | This way we always call the same functions before and after the change. */ | |
3767 | static Lisp_Object last_overlay_modification_hooks; | |
3768 | ||
3769 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
3770 | static int last_overlay_modification_hooks_used; | |
3771 | ||
3772 | /* Add one functionlist/overlay pair | |
3773 | to the end of last_overlay_modification_hooks. */ | |
3774 | ||
3775 | static void | |
3776 | add_overlay_mod_hooklist (functionlist, overlay) | |
3777 | Lisp_Object functionlist, overlay; | |
3778 | { | |
3779 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
3780 | ||
3781 | if (last_overlay_modification_hooks_used == oldsize) | |
3782 | { | |
3783 | Lisp_Object old; | |
3784 | old = last_overlay_modification_hooks; | |
3785 | last_overlay_modification_hooks | |
3786 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
3787 | bcopy (XVECTOR (old)->contents, |
3788 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
3789 | sizeof (Lisp_Object) * oldsize); |
3790 | } | |
3791 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = functionlist; | |
3792 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = overlay; | |
3793 | } | |
3794 | \f | |
173f2a64 RS |
3795 | /* Run the modification-hooks of overlays that include |
3796 | any part of the text in START to END. | |
9115729e KH |
3797 | If this change is an insertion, also |
3798 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
3799 | and the insert-after-hooks of overlay ending at START. |
3800 | ||
3801 | This is called both before and after the modification. | |
3802 | AFTER is nonzero when we call after the modification. | |
3803 | ||
9115729e KH |
3804 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
3805 | When AFTER is nonzero, they are the start position, | |
3806 | the position after the inserted new text, | |
3807 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
3808 | |
3809 | void | |
930a9140 | 3810 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 3811 | Lisp_Object start, end; |
930a9140 RS |
3812 | int after; |
3813 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 RS |
3814 | { |
3815 | Lisp_Object prop, overlay, tail; | |
9115729e KH |
3816 | /* 1 if this change is an insertion. */ |
3817 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
55b48893 | 3818 | int tail_copied; |
930a9140 | 3819 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
55b48893 RS |
3820 | |
3821 | overlay = Qnil; | |
3822 | tail = Qnil; | |
930a9140 | 3823 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
173f2a64 | 3824 | |
9115729e KH |
3825 | if (after) |
3826 | { | |
3827 | /* Call the functions recorded in last_overlay_modification_hooks | |
3828 | rather than scanning the overlays again. | |
3829 | First copy the vector contents, in case some of these hooks | |
3830 | do subsequent modification of the buffer. */ | |
3831 | int size = last_overlay_modification_hooks_used; | |
3832 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
3833 | int i; | |
3834 | ||
3835 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
3836 | copy, size * sizeof (Lisp_Object)); | |
3837 | gcpro1.var = copy; | |
3838 | gcpro1.nvars = size; | |
3839 | ||
3840 | for (i = 0; i < size;) | |
3841 | { | |
3842 | Lisp_Object prop, overlay; | |
3843 | prop = copy[i++]; | |
3844 | overlay = copy[i++]; | |
3845 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
3846 | } | |
3847 | UNGCPRO; | |
3848 | return; | |
3849 | } | |
3850 | ||
3851 | /* We are being called before a change. | |
3852 | Scan the overlays to find the functions to call. */ | |
3853 | last_overlay_modification_hooks_used = 0; | |
55b48893 | 3854 | tail_copied = 0; |
173f2a64 RS |
3855 | for (tail = current_buffer->overlays_before; |
3856 | CONSP (tail); | |
7539e11f | 3857 | tail = XCDR (tail)) |
173f2a64 RS |
3858 | { |
3859 | int startpos, endpos; | |
be8b1c6b | 3860 | Lisp_Object ostart, oend; |
173f2a64 | 3861 | |
7539e11f | 3862 | overlay = XCAR (tail); |
173f2a64 RS |
3863 | |
3864 | ostart = OVERLAY_START (overlay); | |
3865 | oend = OVERLAY_END (overlay); | |
3866 | endpos = OVERLAY_POSITION (oend); | |
3867 | if (XFASTINT (start) > endpos) | |
3868 | break; | |
3869 | startpos = OVERLAY_POSITION (ostart); | |
9115729e KH |
3870 | if (insertion && (XFASTINT (start) == startpos |
3871 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3872 | { |
3873 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3874 | if (!NILP (prop)) |
3875 | { | |
3876 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
3877 | if (!tail_copied) |
3878 | tail = Fcopy_sequence (tail); | |
3879 | tail_copied = 1; | |
930a9140 | 3880 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3881 | } |
173f2a64 | 3882 | } |
9115729e KH |
3883 | if (insertion && (XFASTINT (start) == endpos |
3884 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3885 | { |
3886 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
3887 | if (!NILP (prop)) |
3888 | { | |
55b48893 RS |
3889 | if (!tail_copied) |
3890 | tail = Fcopy_sequence (tail); | |
3891 | tail_copied = 1; | |
930a9140 | 3892 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3893 | } |
173f2a64 | 3894 | } |
3bd13e92 KH |
3895 | /* Test for intersecting intervals. This does the right thing |
3896 | for both insertion and deletion. */ | |
3897 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3898 | { |
3899 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3900 | if (!NILP (prop)) |
3901 | { | |
55b48893 RS |
3902 | if (!tail_copied) |
3903 | tail = Fcopy_sequence (tail); | |
3904 | tail_copied = 1; | |
930a9140 | 3905 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3906 | } |
173f2a64 RS |
3907 | } |
3908 | } | |
3909 | ||
55b48893 | 3910 | tail_copied = 0; |
173f2a64 RS |
3911 | for (tail = current_buffer->overlays_after; |
3912 | CONSP (tail); | |
7539e11f | 3913 | tail = XCDR (tail)) |
173f2a64 RS |
3914 | { |
3915 | int startpos, endpos; | |
be8b1c6b | 3916 | Lisp_Object ostart, oend; |
173f2a64 | 3917 | |
7539e11f | 3918 | overlay = XCAR (tail); |
173f2a64 RS |
3919 | |
3920 | ostart = OVERLAY_START (overlay); | |
3921 | oend = OVERLAY_END (overlay); | |
3922 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 3923 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
3924 | if (XFASTINT (end) < startpos) |
3925 | break; | |
9115729e KH |
3926 | if (insertion && (XFASTINT (start) == startpos |
3927 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3928 | { |
3929 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3930 | if (!NILP (prop)) |
3931 | { | |
55b48893 RS |
3932 | if (!tail_copied) |
3933 | tail = Fcopy_sequence (tail); | |
3934 | tail_copied = 1; | |
930a9140 | 3935 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3936 | } |
173f2a64 | 3937 | } |
9115729e KH |
3938 | if (insertion && (XFASTINT (start) == endpos |
3939 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3940 | { |
3941 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
3942 | if (!NILP (prop)) |
3943 | { | |
55b48893 RS |
3944 | if (!tail_copied) |
3945 | tail = Fcopy_sequence (tail); | |
3946 | tail_copied = 1; | |
930a9140 | 3947 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3948 | } |
173f2a64 | 3949 | } |
3bd13e92 KH |
3950 | /* Test for intersecting intervals. This does the right thing |
3951 | for both insertion and deletion. */ | |
3952 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3953 | { |
3954 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3955 | if (!NILP (prop)) |
3956 | { | |
55b48893 RS |
3957 | if (!tail_copied) |
3958 | tail = Fcopy_sequence (tail); | |
3959 | tail_copied = 1; | |
930a9140 | 3960 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3961 | } |
173f2a64 RS |
3962 | } |
3963 | } | |
55b48893 RS |
3964 | |
3965 | UNGCPRO; | |
173f2a64 RS |
3966 | } |
3967 | ||
3968 | static void | |
930a9140 RS |
3969 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
3970 | Lisp_Object list, overlay; | |
3971 | int after; | |
3972 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 3973 | { |
930a9140 | 3974 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 3975 | |
930a9140 | 3976 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e KH |
3977 | if (! after) |
3978 | add_overlay_mod_hooklist (list, overlay); | |
3979 | ||
173f2a64 RS |
3980 | while (!NILP (list)) |
3981 | { | |
930a9140 RS |
3982 | if (NILP (arg3)) |
3983 | call4 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2); | |
3984 | else | |
3985 | call5 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); | |
173f2a64 RS |
3986 | list = Fcdr (list); |
3987 | } | |
3988 | UNGCPRO; | |
3989 | } | |
9d7608b7 KH |
3990 | |
3991 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
3992 | property is set. */ | |
3993 | void | |
3994 | evaporate_overlays (pos) | |
3995 | int pos; | |
3996 | { | |
3997 | Lisp_Object tail, overlay, hit_list; | |
3998 | ||
3999 | hit_list = Qnil; | |
4000 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
4001 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
7539e11f | 4002 | tail = XCDR (tail)) |
9d7608b7 KH |
4003 | { |
4004 | int endpos; | |
7539e11f | 4005 | overlay = XCAR (tail); |
9d7608b7 KH |
4006 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4007 | if (endpos < pos) | |
4008 | break; | |
4009 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4010 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4011 | hit_list = Fcons (overlay, hit_list); |
4012 | } | |
4013 | else | |
4014 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
7539e11f | 4015 | tail = XCDR (tail)) |
9d7608b7 KH |
4016 | { |
4017 | int startpos; | |
7539e11f | 4018 | overlay = XCAR (tail); |
9d7608b7 KH |
4019 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4020 | if (startpos > pos) | |
4021 | break; | |
4022 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4023 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4024 | hit_list = Fcons (overlay, hit_list); |
4025 | } | |
7539e11f KR |
4026 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4027 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4028 | } |
173f2a64 | 4029 | \f |
54dfdeb0 | 4030 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4031 | in the slot with offset OFFSET. */ |
4032 | ||
0fa3ba92 | 4033 | void |
54dfdeb0 KH |
4034 | buffer_slot_type_mismatch (offset) |
4035 | int offset; | |
0fa3ba92 | 4036 | { |
54dfdeb0 | 4037 | Lisp_Object sym; |
0fa3ba92 | 4038 | char *type_name; |
7c02e886 | 4039 | |
7313acd0 | 4040 | switch (XINT (PER_BUFFER_TYPE (offset))) |
0fa3ba92 | 4041 | { |
7c02e886 GM |
4042 | case Lisp_Int: |
4043 | type_name = "integers"; | |
4044 | break; | |
4045 | ||
4046 | case Lisp_String: | |
4047 | type_name = "strings"; | |
4048 | break; | |
4049 | ||
4050 | case Lisp_Symbol: | |
4051 | type_name = "symbols"; | |
4052 | break; | |
4053 | ||
0fa3ba92 JB |
4054 | default: |
4055 | abort (); | |
4056 | } | |
4057 | ||
7313acd0 | 4058 | sym = PER_BUFFER_SYMBOL (offset); |
1bf08baf | 4059 | error ("Only %s should be stored in the buffer-local variable %s", |
54dfdeb0 | 4060 | type_name, XSYMBOL (sym)->name->data); |
0fa3ba92 | 4061 | } |
7c02e886 | 4062 | |
0fa3ba92 | 4063 | \f |
b86af064 GM |
4064 | /*********************************************************************** |
4065 | Allocation with mmap | |
4066 | ***********************************************************************/ | |
4067 | ||
4068 | #ifdef USE_MMAP_FOR_BUFFERS | |
4069 | ||
4070 | #include <sys/types.h> | |
4071 | #include <sys/mman.h> | |
4072 | ||
4073 | #ifndef MAP_ANON | |
4074 | #ifdef MAP_ANONYMOUS | |
4075 | #define MAP_ANON MAP_ANONYMOUS | |
4076 | #else | |
4077 | #define MAP_ANON 0 | |
4078 | #endif | |
4079 | #endif | |
4080 | ||
4081 | #include <stdio.h> | |
4082 | #include <errno.h> | |
4083 | ||
4084 | #if MAP_ANON == 0 | |
4085 | #include <fcntl.h> | |
4086 | #endif | |
4087 | ||
4088 | #include "coding.h" | |
4089 | ||
4090 | ||
4091 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4092 | The current implementation lets the system select mapped | |
4093 | addresses; we're not using MAP_FIXED in general, except when | |
4094 | trying to enlarge regions. | |
4095 | ||
4096 | Each mapped region starts with a mmap_region structure, the user | |
4097 | area starts after that structure, aligned to MEM_ALIGN. | |
4098 | ||
4099 | +-----------------------+ | |
4100 | | struct mmap_info + | | |
4101 | | padding | | |
4102 | +-----------------------+ | |
4103 | | user data | | |
4104 | | | | |
4105 | | | | |
4106 | +-----------------------+ */ | |
4107 | ||
4108 | struct mmap_region | |
4109 | { | |
4110 | /* User-specified size. */ | |
4111 | size_t nbytes_specified; | |
4112 | ||
4113 | /* Number of bytes mapped */ | |
4114 | size_t nbytes_mapped; | |
4115 | ||
4116 | /* Pointer to the location holding the address of the memory | |
4117 | allocated with the mmap'd block. The variable actually points | |
4118 | after this structure. */ | |
4119 | POINTER_TYPE **var; | |
4120 | ||
4121 | /* Next and previous in list of all mmap'd regions. */ | |
4122 | struct mmap_region *next, *prev; | |
4123 | }; | |
4124 | ||
4125 | /* Doubly-linked list of mmap'd regions. */ | |
4126 | ||
4127 | static struct mmap_region *mmap_regions; | |
4128 | ||
4129 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4130 | /dev/zero will be opened on it. */ | |
4131 | ||
4132 | static int mmap_fd; | |
4133 | ||
4134 | /* Temporary storage for mmap_set_vars, see there. */ | |
4135 | ||
4136 | static struct mmap_region *mmap_regions_1; | |
4137 | static int mmap_fd_1; | |
4138 | ||
4139 | /* Page size on this system. */ | |
4140 | ||
4141 | static int mmap_page_size; | |
4142 | ||
4143 | /* 1 means mmap has been intialized. */ | |
4144 | ||
4145 | static int mmap_initialized_p; | |
4146 | ||
4147 | /* Value is X rounded up to the next multiple of N. */ | |
4148 | ||
4149 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4150 | ||
4151 | /* Size of mmap_region structure plus padding. */ | |
4152 | ||
4153 | #define MMAP_REGION_STRUCT_SIZE \ | |
4154 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4155 | ||
4156 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4157 | region, return a pointer to the start of the region. */ | |
4158 | ||
4159 | #define MMAP_REGION(P) \ | |
4160 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4161 | ||
4162 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4163 | to the start of the user-visible part of the region. */ | |
4164 | ||
4165 | #define MMAP_USER_AREA(P) \ | |
4166 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4167 | ||
4168 | #define MEM_ALIGN sizeof (double) | |
4169 | ||
4170 | /* Function prototypes. */ | |
4171 | ||
4172 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4173 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4174 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4175 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4176 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4177 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4178 | static void mmap_init P_ ((void)); | |
4179 | ||
4180 | ||
4181 | /* Return a region overlapping address range START...END, or null if | |
4182 | none. END is not including, i.e. the last byte in the range | |
4183 | is at END - 1. */ | |
4184 | ||
4185 | static struct mmap_region * | |
4186 | mmap_find (start, end) | |
4187 | POINTER_TYPE *start, *end; | |
4188 | { | |
4189 | struct mmap_region *r; | |
4190 | char *s = (char *) start, *e = (char *) end; | |
4191 | ||
4192 | for (r = mmap_regions; r; r = r->next) | |
4193 | { | |
4194 | char *rstart = (char *) r; | |
4195 | char *rend = rstart + r->nbytes_mapped; | |
4196 | ||
4197 | if (/* First byte of range, i.e. START, in this region? */ | |
4198 | (s >= rstart && s < rend) | |
4199 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4200 | || (e > rstart && e <= rend) | |
4201 | /* First byte of this region in the range? */ | |
4202 | || (rstart >= s && rstart < e) | |
4203 | /* Last byte of this region in the range? */ | |
4204 | || (rend > s && rend <= e)) | |
4205 | break; | |
4206 | } | |
4207 | ||
4208 | return r; | |
4209 | } | |
4210 | ||
4211 | ||
4212 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4213 | the region. Value is non-zero if successful. */ | |
4214 | ||
4215 | static int | |
4216 | mmap_free_1 (r) | |
4217 | struct mmap_region *r; | |
4218 | { | |
4219 | if (r->next) | |
4220 | r->next->prev = r->prev; | |
4221 | if (r->prev) | |
4222 | r->prev->next = r->next; | |
4223 | else | |
4224 | mmap_regions = r->next; | |
4225 | ||
4226 | if (munmap (r, r->nbytes_mapped) == -1) | |
4227 | { | |
4228 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4229 | return 0; | |
4230 | } | |
4231 | ||
4232 | return 1; | |
4233 | } | |
4234 | ||
4235 | ||
4236 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4237 | Value is non-zero if successful. */ | |
4238 | ||
4239 | static int | |
4240 | mmap_enlarge (r, npages) | |
4241 | struct mmap_region *r; | |
4242 | int npages; | |
4243 | { | |
4244 | char *region_end = (char *) r + r->nbytes_mapped; | |
4245 | size_t nbytes; | |
4246 | int success = 0; | |
4247 | ||
4248 | if (npages < 0) | |
4249 | { | |
4250 | /* Unmap pages at the end of the region. */ | |
4251 | nbytes = - npages * mmap_page_size; | |
4252 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4253 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4254 | else | |
4255 | { | |
4256 | r->nbytes_mapped -= nbytes; | |
4257 | success = 1; | |
4258 | } | |
4259 | } | |
4260 | else if (npages > 0) | |
4261 | { | |
4262 | struct mmap_region *r2; | |
4263 | ||
4264 | nbytes = npages * mmap_page_size; | |
4265 | ||
4266 | /* Try to map additional pages at the end of the region. We | |
4267 | cannot do this if the address range is already occupied by | |
4268 | something else because mmap deletes any previous mapping. | |
4269 | I'm not sure this is worth doing, let's see. */ | |
4270 | r2 = mmap_find (region_end, region_end + nbytes); | |
4271 | if (r2 == NULL) | |
4272 | { | |
4273 | POINTER_TYPE *p; | |
4274 | ||
4275 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, | |
4276 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4277 | if (p == MAP_FAILED) | |
edaa9aed | 4278 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4279 | else if (p != (POINTER_TYPE *) region_end) |
4280 | { | |
4281 | /* Kernels are free to choose a different address. In | |
4282 | that case, unmap what we've mapped above; we have | |
4283 | no use for it. */ | |
4284 | if (munmap (p, nbytes) == -1) | |
4285 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4286 | } | |
4287 | else | |
4288 | { | |
4289 | r->nbytes_mapped += nbytes; | |
4290 | success = 1; | |
4291 | } | |
4292 | } | |
4293 | } | |
4294 | ||
4295 | return success; | |
4296 | } | |
4297 | ||
4298 | ||
4299 | /* Set or reset variables holding references to mapped regions. If | |
4300 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4301 | non-zero, set all variables to the start of the user-areas | |
4302 | of mapped regions. | |
4303 | ||
4304 | This function is called from Fdump_emacs to ensure that the dumped | |
4305 | Emacs doesn't contain references to memory that won't be mapped | |
4306 | when Emacs starts. */ | |
4307 | ||
4308 | void | |
4309 | mmap_set_vars (restore_p) | |
4310 | int restore_p; | |
4311 | { | |
4312 | struct mmap_region *r; | |
4313 | ||
4314 | if (restore_p) | |
4315 | { | |
4316 | mmap_regions = mmap_regions_1; | |
4317 | mmap_fd = mmap_fd_1; | |
4318 | for (r = mmap_regions; r; r = r->next) | |
4319 | *r->var = MMAP_USER_AREA (r); | |
4320 | } | |
4321 | else | |
4322 | { | |
4323 | for (r = mmap_regions; r; r = r->next) | |
4324 | *r->var = NULL; | |
4325 | mmap_regions_1 = mmap_regions; | |
4326 | mmap_regions = NULL; | |
4327 | mmap_fd_1 = mmap_fd; | |
4328 | mmap_fd = -1; | |
4329 | } | |
4330 | } | |
4331 | ||
4332 | ||
4333 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4334 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4335 | address of some variable which will use the data area. | |
4336 | ||
4337 | The allocation of 0 bytes is valid. | |
4338 | ||
4339 | If we can't allocate the necessary memory, set *VAR to null, and | |
4340 | return null. */ | |
4341 | ||
4342 | static POINTER_TYPE * | |
4343 | mmap_alloc (var, nbytes) | |
4344 | POINTER_TYPE **var; | |
4345 | size_t nbytes; | |
4346 | { | |
4347 | void *p; | |
4348 | size_t map; | |
4349 | ||
4350 | mmap_init (); | |
4351 | ||
4352 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4353 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4354 | mmap_fd, 0); | |
4355 | ||
4356 | if (p == MAP_FAILED) | |
4357 | { | |
4358 | if (errno != ENOMEM) | |
4359 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4360 | p = NULL; | |
4361 | } | |
4362 | else | |
4363 | { | |
4364 | struct mmap_region *r = (struct mmap_region *) p; | |
4365 | ||
4366 | r->nbytes_specified = nbytes; | |
4367 | r->nbytes_mapped = map; | |
4368 | r->var = var; | |
4369 | r->prev = NULL; | |
4370 | r->next = mmap_regions; | |
4371 | if (r->next) | |
4372 | r->next->prev = r; | |
4373 | mmap_regions = r; | |
4374 | ||
4375 | p = MMAP_USER_AREA (p); | |
4376 | } | |
4377 | ||
4378 | return *var = p; | |
4379 | } | |
4380 | ||
4381 | ||
4382 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4383 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4384 | and return this value. If more memory cannot be allocated, then | |
4385 | leave *VAR unchanged, and return null. */ | |
4386 | ||
4387 | static POINTER_TYPE * | |
4388 | mmap_realloc (var, nbytes) | |
4389 | POINTER_TYPE **var; | |
4390 | size_t nbytes; | |
4391 | { | |
4392 | POINTER_TYPE *result; | |
4393 | ||
4394 | mmap_init (); | |
4395 | ||
4396 | if (*var == NULL) | |
4397 | result = mmap_alloc (var, nbytes); | |
4398 | else if (nbytes == 0) | |
4399 | { | |
4400 | mmap_free (var); | |
4401 | result = mmap_alloc (var, nbytes); | |
4402 | } | |
4403 | else | |
4404 | { | |
4405 | struct mmap_region *r = MMAP_REGION (*var); | |
4406 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
4407 | ||
4408 | if (room < nbytes) | |
4409 | { | |
4410 | /* Must enlarge. */ | |
4411 | POINTER_TYPE *old_ptr = *var; | |
4412 | ||
4413 | /* Try to map additional pages at the end of the region. | |
4414 | If that fails, allocate a new region, copy data | |
4415 | from the old region, then free it. */ | |
4416 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4417 | / mmap_page_size))) | |
4418 | { | |
4419 | r->nbytes_specified = nbytes; | |
4420 | *var = result = old_ptr; | |
4421 | } | |
4422 | else if (mmap_alloc (var, nbytes)) | |
4423 | { | |
4424 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4425 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4426 | result = *var; | |
4427 | r = MMAP_REGION (result); | |
4428 | r->nbytes_specified = nbytes; | |
4429 | } | |
4430 | else | |
4431 | { | |
4432 | *var = old_ptr; | |
4433 | result = NULL; | |
4434 | } | |
4435 | } | |
4436 | else if (room - nbytes >= mmap_page_size) | |
4437 | { | |
4438 | /* Shrinking by at least a page. Let's give some | |
4439 | memory back to the system. */ | |
4440 | mmap_enlarge (r, - (room - nbytes) / mmap_page_size); | |
4441 | result = *var; | |
4442 | r->nbytes_specified = nbytes; | |
4443 | } | |
4444 | else | |
4445 | { | |
4446 | /* Leave it alone. */ | |
4447 | result = *var; | |
4448 | r->nbytes_specified = nbytes; | |
4449 | } | |
4450 | } | |
4451 | ||
4452 | return result; | |
4453 | } | |
4454 | ||
4455 | ||
4456 | /* Free a block of relocatable storage whose data is pointed to by | |
4457 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4458 | ||
4459 | static void | |
4460 | mmap_free (var) | |
4461 | POINTER_TYPE **var; | |
4462 | { | |
4463 | mmap_init (); | |
4464 | ||
4465 | if (*var) | |
4466 | { | |
4467 | mmap_free_1 (MMAP_REGION (*var)); | |
4468 | *var = NULL; | |
4469 | } | |
4470 | } | |
4471 | ||
4472 | ||
4473 | /* Perform necessary intializations for the use of mmap. */ | |
4474 | ||
4475 | static void | |
4476 | mmap_init () | |
4477 | { | |
4478 | #if MAP_ANON == 0 | |
4479 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4480 | in a dumped Emacs. */ | |
4481 | if (mmap_fd <= 0) | |
4482 | { | |
4483 | /* No anonymous mmap -- we need the file descriptor. */ | |
4484 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4485 | if (mmap_fd == -1) | |
4486 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4487 | } | |
4488 | #endif /* MAP_ANON == 0 */ | |
4489 | ||
4490 | if (mmap_initialized_p) | |
4491 | return; | |
4492 | mmap_initialized_p = 1; | |
4493 | ||
4494 | #if MAP_ANON != 0 | |
4495 | mmap_fd = -1; | |
4496 | #endif | |
4497 | ||
4498 | mmap_page_size = getpagesize (); | |
4499 | } | |
4500 | ||
4501 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4502 | ||
4503 | ||
4504 | \f | |
4505 | /*********************************************************************** | |
4506 | Buffer-text Allocation | |
4507 | ***********************************************************************/ | |
4508 | ||
4509 | #ifdef REL_ALLOC | |
4510 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
4511 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
4512 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
4513 | #endif /* REL_ALLOC */ | |
4514 | ||
4515 | ||
4516 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4517 | ||
4518 | static void | |
4519 | alloc_buffer_text (b, nbytes) | |
4520 | struct buffer *b; | |
4521 | size_t nbytes; | |
4522 | { | |
4523 | POINTER_TYPE *p; | |
4524 | ||
4525 | BLOCK_INPUT; | |
4526 | #if defined USE_MMAP_FOR_BUFFERS | |
4527 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4528 | #elif defined REL_ALLOC | |
4529 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4530 | #else | |
815add84 | 4531 | p = xmalloc (nbytes); |
b86af064 GM |
4532 | #endif |
4533 | ||
4534 | if (p == NULL) | |
4535 | { | |
4536 | UNBLOCK_INPUT; | |
4537 | memory_full (); | |
4538 | } | |
4539 | ||
4540 | b->text->beg = (unsigned char *) p; | |
4541 | UNBLOCK_INPUT; | |
4542 | } | |
4543 | ||
4544 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4545 | shrink it. */ | |
4546 | ||
4547 | void | |
4548 | enlarge_buffer_text (b, delta) | |
4549 | struct buffer *b; | |
4550 | int delta; | |
4551 | { | |
4552 | POINTER_TYPE *p; | |
4553 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4554 | + delta); | |
4555 | BLOCK_INPUT; | |
4556 | #if defined USE_MMAP_FOR_BUFFERS | |
4557 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4558 | #elif defined REL_ALLOC | |
4559 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4560 | #else | |
4561 | p = xrealloc (b->text->beg, nbytes); | |
4562 | #endif | |
4563 | ||
4564 | if (p == NULL) | |
4565 | { | |
4566 | UNBLOCK_INPUT; | |
4567 | memory_full (); | |
4568 | } | |
4569 | ||
4570 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4571 | UNBLOCK_INPUT; | |
4572 | } | |
4573 | ||
4574 | ||
4575 | /* Free buffer B's text buffer. */ | |
4576 | ||
4577 | static void | |
4578 | free_buffer_text (b) | |
4579 | struct buffer *b; | |
4580 | { | |
4581 | BLOCK_INPUT; | |
4582 | ||
4583 | #if defined USE_MMAP_FOR_BUFFERS | |
4584 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4585 | #elif defined REL_ALLOC | |
4586 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4587 | #else | |
4588 | xfree (b->text->beg); | |
4589 | #endif | |
4590 | ||
4591 | BUF_BEG_ADDR (b) = NULL; | |
4592 | UNBLOCK_INPUT; | |
4593 | } | |
4594 | ||
4595 | ||
4596 | \f | |
4597 | /*********************************************************************** | |
4598 | Initialization | |
4599 | ***********************************************************************/ | |
4600 | ||
dfcf069d | 4601 | void |
1ab256cb RM |
4602 | init_buffer_once () |
4603 | { | |
7c02e886 GM |
4604 | int idx; |
4605 | ||
4606 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 4607 | |
1ab256cb RM |
4608 | /* Make sure all markable slots in buffer_defaults |
4609 | are initialized reasonably, so mark_buffer won't choke. */ | |
4610 | reset_buffer (&buffer_defaults); | |
13de9290 | 4611 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 4612 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4613 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4614 | /* Prevent GC from getting confused. */ |
4615 | buffer_defaults.text = &buffer_defaults.own_text; | |
4616 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4617 | BUF_INTERVALS (&buffer_defaults) = 0; |
4618 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
67180c6a KH |
4619 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
4620 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
4621 | |
4622 | /* Set up the default values of various buffer slots. */ | |
4623 | /* Must do these before making the first buffer! */ | |
4624 | ||
f532dca0 | 4625 | /* real setup is done in bindings.el */ |
1ab256cb | 4626 | buffer_defaults.mode_line_format = build_string ("%-"); |
045dee35 | 4627 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
4628 | buffer_defaults.abbrev_mode = Qnil; |
4629 | buffer_defaults.overwrite_mode = Qnil; | |
4630 | buffer_defaults.case_fold_search = Qt; | |
4631 | buffer_defaults.auto_fill_function = Qnil; | |
4632 | buffer_defaults.selective_display = Qnil; | |
4633 | #ifndef old | |
4634 | buffer_defaults.selective_display_ellipses = Qt; | |
4635 | #endif | |
4636 | buffer_defaults.abbrev_table = Qnil; | |
4637 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 4638 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 4639 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 4640 | buffer_defaults.file_format = Qnil; |
2eec3b4e RS |
4641 | buffer_defaults.overlays_before = Qnil; |
4642 | buffer_defaults.overlays_after = Qnil; | |
bbbe9545 | 4643 | XSETFASTINT (buffer_defaults.overlay_center, BEG); |
1ab256cb | 4644 | |
8d7a4592 | 4645 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
4646 | buffer_defaults.truncate_lines = Qnil; |
4647 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 4648 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 4649 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 4650 | buffer_defaults.extra_line_spacing = Qnil; |
1ab256cb | 4651 | |
f7975d07 | 4652 | #ifdef DOS_NT |
0776cb1b | 4653 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 4654 | #endif |
a1a17b61 | 4655 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 4656 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
4657 | XSETFASTINT (buffer_defaults.fill_column, 70); |
4658 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 4659 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 4660 | buffer_defaults.file_truename = Qnil; |
7962a441 | 4661 | XSETFASTINT (buffer_defaults.display_count, 0); |
0552666b GM |
4662 | buffer_defaults.indicate_empty_lines = Qnil; |
4663 | buffer_defaults.scroll_up_aggressively = Qnil; | |
4664 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 4665 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
4666 | |
4667 | /* Assign the local-flags to the slots that have default values. | |
4668 | The local flag is a bit that is used in the buffer | |
4669 | to say that it has its own local value for the slot. | |
4670 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
4671 | ||
4672 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 4673 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
4674 | |
4675 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
4676 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
4677 | XSETINT (buffer_local_flags.filename, -1); |
4678 | XSETINT (buffer_local_flags.directory, -1); | |
4679 | XSETINT (buffer_local_flags.backed_up, -1); | |
4680 | XSETINT (buffer_local_flags.save_length, -1); | |
4681 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
4682 | XSETINT (buffer_local_flags.read_only, -1); | |
4683 | XSETINT (buffer_local_flags.major_mode, -1); | |
4684 | XSETINT (buffer_local_flags.mode_name, -1); | |
4685 | XSETINT (buffer_local_flags.undo_list, -1); | |
4686 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 4687 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 4688 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 4689 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 4690 | XSETINT (buffer_local_flags.file_format, -1); |
7962a441 | 4691 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 4692 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 4693 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 4694 | |
7c02e886 GM |
4695 | idx = 1; |
4696 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
4697 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
4698 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
4699 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
4700 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
4701 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 4702 | #ifndef old |
7c02e886 | 4703 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 4704 | #endif |
7c02e886 GM |
4705 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
4706 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
4707 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; | |
4708 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
4709 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
4710 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
4711 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 4712 | #ifdef DOS_NT |
7c02e886 | 4713 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 4714 | /* Make this one a permanent local. */ |
7c02e886 | 4715 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 4716 | #endif |
7c02e886 GM |
4717 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
4718 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
4719 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
4720 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
4721 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); | |
a1a17b61 | 4722 | /* Make this one a permanent local. */ |
7c02e886 GM |
4723 | buffer_permanent_local_flags[idx++] = 1; |
4724 | XSETFASTINT (buffer_local_flags.left_margin_width, idx); ++idx; | |
4725 | XSETFASTINT (buffer_local_flags.right_margin_width, idx); ++idx; | |
4726 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; | |
4727 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; | |
4728 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
4729 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 4730 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 4731 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
7c02e886 GM |
4732 | |
4733 | /* Need more room? */ | |
7313acd0 | 4734 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 4735 | abort (); |
7313acd0 | 4736 | last_per_buffer_idx = idx; |
c71b5d9b | 4737 | |
1ab256cb RM |
4738 | Vbuffer_alist = Qnil; |
4739 | current_buffer = 0; | |
4740 | all_buffers = 0; | |
4741 | ||
4742 | QSFundamental = build_string ("Fundamental"); | |
4743 | ||
4744 | Qfundamental_mode = intern ("fundamental-mode"); | |
4745 | buffer_defaults.major_mode = Qfundamental_mode; | |
4746 | ||
4747 | Qmode_class = intern ("mode-class"); | |
4748 | ||
4749 | Qprotected_field = intern ("protected-field"); | |
4750 | ||
4751 | Qpermanent_local = intern ("permanent-local"); | |
4752 | ||
4753 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
4754 | ||
4755 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
000f8083 | 4756 | |
1ab256cb RM |
4757 | /* super-magic invisible buffer */ |
4758 | Vbuffer_alist = Qnil; | |
4759 | ||
ffd56f97 | 4760 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
4761 | |
4762 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
4763 | } |
4764 | ||
dfcf069d | 4765 | void |
1ab256cb RM |
4766 | init_buffer () |
4767 | { | |
93c27ef1 | 4768 | char buf[MAXPATHLEN + 1]; |
2381d133 JB |
4769 | char *pwd; |
4770 | struct stat dotstat, pwdstat; | |
136351b7 | 4771 | Lisp_Object temp; |
f7975d07 | 4772 | int rc; |
1ab256cb | 4773 | |
b86af064 | 4774 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
4775 | { |
4776 | /* When using the ralloc implementation based on mmap(2), buffer | |
4777 | text pointers will have been set to null in the dumped Emacs. | |
4778 | Map new memory. */ | |
4779 | struct buffer *b; | |
4780 | ||
93c27ef1 GM |
4781 | for (b = all_buffers; b; b = b->next) |
4782 | if (b->text->beg == NULL) | |
b86af064 | 4783 | enlarge_buffer_text (b, 0); |
93c27ef1 | 4784 | } |
b86af064 | 4785 | #endif /* USE_MMAP_FOR_BUFFERS */ |
93c27ef1 | 4786 | |
1ab256cb | 4787 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
4788 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
4789 | Fset_buffer_multibyte (Qnil); | |
2381d133 JB |
4790 | |
4791 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
4792 | when PWD is right, and may avoid a fatal error. */ | |
309f2a6e RS |
4793 | if ((pwd = getenv ("PWD")) != 0 |
4794 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) | |
2381d133 JB |
4795 | && stat (pwd, &pwdstat) == 0 |
4796 | && stat (".", &dotstat) == 0 | |
4797 | && dotstat.st_ino == pwdstat.st_ino | |
4798 | && dotstat.st_dev == pwdstat.st_dev | |
4799 | && strlen (pwd) < MAXPATHLEN) | |
4800 | strcpy (buf, pwd); | |
6335beb0 RS |
4801 | #ifdef HAVE_GETCWD |
4802 | else if (getcwd (buf, MAXPATHLEN+1) == 0) | |
9dde47f5 | 4803 | fatal ("`getcwd' failed: %s\n", strerror (errno)); |
6335beb0 | 4804 | #else |
2381d133 | 4805 | else if (getwd (buf) == 0) |
cf1e6391 | 4806 | fatal ("`getwd' failed: %s\n", buf); |
6335beb0 | 4807 | #endif |
1ab256cb RM |
4808 | |
4809 | #ifndef VMS | |
4810 | /* Maybe this should really use some standard subroutine | |
4811 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
4812 | rc = strlen (buf); |
4813 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
4814 | { | |
4815 | buf[rc] = DIRECTORY_SEP; | |
4816 | buf[rc + 1] = '\0'; | |
4817 | } | |
1ab256cb | 4818 | #endif /* not VMS */ |
0995fa35 | 4819 | |
1ab256cb | 4820 | current_buffer->directory = build_string (buf); |
136351b7 | 4821 | |
0995fa35 RS |
4822 | /* Add /: to the front of the name |
4823 | if it would otherwise be treated as magic. */ | |
4824 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
4825 | if (! NILP (temp) |
4826 | /* If the default dir is just /, TEMP is non-nil | |
4827 | because of the ange-ftp completion handler. | |
4828 | However, it is not necessary to turn / into /:/. | |
4829 | So avoid doing that. */ | |
4830 | && strcmp ("/", XSTRING (current_buffer->directory)->data)) | |
0995fa35 RS |
4831 | current_buffer->directory |
4832 | = concat2 (build_string ("/:"), current_buffer->directory); | |
4833 | ||
136351b7 RS |
4834 | temp = get_minibuffer (0); |
4835 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
4836 | } |
4837 | ||
4838 | /* initialize the buffer routines */ | |
dfcf069d | 4839 | void |
1ab256cb RM |
4840 | syms_of_buffer () |
4841 | { | |
9115729e KH |
4842 | staticpro (&last_overlay_modification_hooks); |
4843 | last_overlay_modification_hooks | |
4844 | = Fmake_vector (make_number (10), Qnil); | |
4845 | ||
1ab256cb RM |
4846 | staticpro (&Vbuffer_defaults); |
4847 | staticpro (&Vbuffer_local_symbols); | |
4848 | staticpro (&Qfundamental_mode); | |
4849 | staticpro (&Qmode_class); | |
4850 | staticpro (&QSFundamental); | |
4851 | staticpro (&Vbuffer_alist); | |
4852 | staticpro (&Qprotected_field); | |
4853 | staticpro (&Qpermanent_local); | |
4854 | staticpro (&Qkill_buffer_hook); | |
22378665 | 4855 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 4856 | staticpro (&Qoverlayp); |
9d7608b7 KH |
4857 | Qevaporate = intern ("evaporate"); |
4858 | staticpro (&Qevaporate); | |
294d215f | 4859 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 4860 | staticpro (&Qmodification_hooks); |
294d215f | 4861 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 4862 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 4863 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 4864 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 4865 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 4866 | staticpro (&Qget_file_buffer); |
5985d248 KH |
4867 | Qpriority = intern ("priority"); |
4868 | staticpro (&Qpriority); | |
4869 | Qwindow = intern ("window"); | |
4870 | staticpro (&Qwindow); | |
bbbe9545 KH |
4871 | Qbefore_string = intern ("before-string"); |
4872 | staticpro (&Qbefore_string); | |
4873 | Qafter_string = intern ("after-string"); | |
4874 | staticpro (&Qafter_string); | |
22378665 RS |
4875 | Qfirst_change_hook = intern ("first-change-hook"); |
4876 | staticpro (&Qfirst_change_hook); | |
4877 | Qbefore_change_functions = intern ("before-change-functions"); | |
4878 | staticpro (&Qbefore_change_functions); | |
4879 | Qafter_change_functions = intern ("after-change-functions"); | |
4880 | staticpro (&Qafter_change_functions); | |
1ab256cb RM |
4881 | |
4882 | Fput (Qprotected_field, Qerror_conditions, | |
4883 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
4884 | Fput (Qprotected_field, Qerror_message, | |
4885 | build_string ("Attempt to modify a protected field")); | |
4886 | ||
4887 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
4888 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
4889 | ||
4890 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
4891 | &buffer_defaults.mode_line_format, | |
4892 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
4893 | This is the same as (default-value 'mode-line-format)."); | |
4894 | ||
045dee35 GM |
4895 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
4896 | &buffer_defaults.header_line_format, | |
4897 | "Default value of `header-line-format' for buffers that don't override it.\n\ | |
4898 | This is the same as (default-value 'header-line-format)."); | |
0552666b | 4899 | |
bd96bd79 GM |
4900 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
4901 | "Default value of `cursor-type' for buffers that don't override it.\n\ | |
4902 | This is the same as (default-value 'cursor-type)."); | |
4903 | ||
a3bbced0 GM |
4904 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
4905 | &buffer_defaults.extra_line_spacing, | |
4906 | "Default value of `line-spacing' for buffers that don't override it.\n\ | |
4907 | This is the same as (default-value 'line-spacing)."); | |
4908 | ||
1ab256cb RM |
4909 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
4910 | &buffer_defaults.abbrev_mode, | |
4911 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
4912 | This is the same as (default-value 'abbrev-mode)."); | |
4913 | ||
4914 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
4915 | &buffer_defaults.ctl_arrow, | |
4916 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
4917 | This is the same as (default-value 'ctl-arrow)."); | |
4918 | ||
3b06f880 KH |
4919 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
4920 | &buffer_defaults.direction_reversed, | |
4921 | "Default value of `direction_reversed' for buffers that do not override it.\n\ | |
4922 | This is the same as (default-value 'direction-reversed)."); | |
4923 | ||
a1a17b61 KH |
4924 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
4925 | &buffer_defaults.enable_multibyte_characters, | |
ed8300d9 | 4926 | "*Default value of `enable-multibyte-characters' for buffers not overriding it.\n\ |
53fe786d | 4927 | This is the same as (default-value 'enable-multibyte-characters)."); |
a1a17b61 | 4928 | |
c71b5d9b KH |
4929 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
4930 | &buffer_defaults.buffer_file_coding_system, | |
4931 | "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\ | |
53fe786d | 4932 | This is the same as (default-value 'buffer-file-coding-system)."); |
c71b5d9b | 4933 | |
1ab256cb RM |
4934 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
4935 | &buffer_defaults.truncate_lines, | |
4936 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
4937 | This is the same as (default-value 'truncate-lines)."); | |
4938 | ||
4939 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
4940 | &buffer_defaults.fill_column, | |
4941 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
4942 | This is the same as (default-value 'fill-column)."); | |
4943 | ||
4944 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
4945 | &buffer_defaults.left_margin, | |
4946 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
4947 | This is the same as (default-value 'left-margin)."); | |
4948 | ||
4949 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
4950 | &buffer_defaults.tab_width, | |
4951 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
4952 | This is the same as (default-value 'tab-width)."); | |
4953 | ||
4954 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
4955 | &buffer_defaults.case_fold_search, | |
4956 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
4957 | This is the same as (default-value 'case-fold-search)."); | |
4958 | ||
f7975d07 | 4959 | #ifdef DOS_NT |
54ad07d3 RS |
4960 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
4961 | &buffer_defaults.buffer_file_type, | |
4962 | "Default file type for buffers that do not override it.\n\ | |
4963 | This is the same as (default-value 'buffer-file-type).\n\ | |
4964 | The file type is nil for text, t for binary."); | |
4965 | #endif | |
4966 | ||
0552666b GM |
4967 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
4968 | &buffer_defaults.left_margin_width, | |
4969 | "Default value of `left-margin-width' for buffers that don't override it.\n\ | |
4970 | This is the same as (default-value 'left-margin-width)."); | |
4971 | ||
4972 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
4973 | &buffer_defaults.right_margin_width, | |
4974 | "Default value of `right_margin_width' for buffers that don't override it.\n\ | |
4975 | This is the same as (default-value 'right-margin-width)."); | |
4976 | ||
4977 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", | |
4978 | &buffer_defaults.indicate_empty_lines, | |
4979 | "Default value of `indicate-empty-lines' for buffers that don't override it.\n\ | |
4980 | This is the same as (default-value 'indicate-empty-lines)."); | |
4981 | ||
4982 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", | |
4983 | &buffer_defaults.scroll_up_aggressively, | |
4984 | "Default value of `scroll-up-aggressively' for buffers that\n\ | |
4985 | don't override it. This is the same as (default-value\n\ | |
4986 | 'scroll-up-aggressively)."); | |
4987 | ||
4988 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", | |
4989 | &buffer_defaults.scroll_down_aggressively, | |
4990 | "Default value of `scroll-down-aggressively' for buffers that\n\ | |
4991 | don't override it. This is the same as (default-value\n\ | |
4992 | 'scroll-down-aggressively)."); | |
4993 | ||
045dee35 GM |
4994 | DEFVAR_PER_BUFFER ("header-line-format", |
4995 | ¤t_buffer->header_line_format, | |
0552666b GM |
4996 | Qnil, |
4997 | "Analogous to `mode-line-format', but for a mode line displayed\n\ | |
4998 | at the top of windows."); | |
4999 | ||
0fa3ba92 JB |
5000 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
5001 | Qnil, 0); | |
1ab256cb RM |
5002 | |
5003 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
5004 | But make-docfile finds it! | |
5005 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 5006 | Qnil, |
1ab256cb RM |
5007 | "Template for displaying mode line for current buffer.\n\ |
5008 | Each buffer has its own value of this variable.\n\ | |
0552666b GM |
5009 | Value may be nil, a string, a symbol or a list or cons cell.\n\ |
5010 | A value of nil means don't display a mode line.\n\ | |
1ab256cb RM |
5011 | For a symbol, its value is used (but it is ignored if t or nil).\n\ |
5012 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
5013 | in that the %-constructs below are not recognized.\n\ | |
fe512f27 GM |
5014 | For a list of the form `(:eval FORM)', FORM is evaluated and the result\n\ |
5015 | is used as a mode line element.\n\ | |
1ab256cb RM |
5016 | For a list whose car is a symbol, the symbol's value is taken,\n\ |
5017 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
5018 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
5019 | For a list whose car is a string or list, each element is processed\n\ | |
5020 | recursively and the results are effectively concatenated.\n\ | |
5021 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
5022 | and padded (if the number is positive) or truncated (if negative)\n\ | |
5023 | to the width specified by that number.\n\ | |
5024 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
5025 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
5026 | or when it is found in a cons-cell or a list)\n\ | |
5027 | %b -- print buffer name. %f -- print visited file name.\n\ | |
5d516f2d | 5028 | %F -- print frame name.\n\ |
c2ff34f7 | 5029 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
08de6200 | 5030 | %& is like %*, but ignore read-only-ness.\n\ |
c2ff34f7 RS |
5031 | % means buffer is read-only and * means it is modified.\n\ |
5032 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ | |
a97c374a | 5033 | %s -- print process status. %l -- print the current line number.\n\ |
07924294 | 5034 | %c -- print the current column number (this makes editing slower).\n\ |
6a567ad8 RS |
5035 | To make the column number update correctly in all cases,\n\ |
5036 | `column-number-mode' must be non-nil.\n\ | |
dd24e6a6 | 5037 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 5038 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 5039 | or print Bottom or All.\n\ |
08de6200 | 5040 | %m -- print the mode name.\n\ |
1ab256cb | 5041 | %n -- print Narrow if appropriate.\n\ |
08de6200 EZ |
5042 | %z -- print mnemonics of buffer, terminal, and keyboard coding systems.\n\ |
5043 | %Z -- like %z, but including the end-of-line format.\n\ | |
1ab256cb RM |
5044 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
5045 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
5046 | Decimal digits after the % specify field width to which to pad."); | |
5047 | */ | |
5048 | ||
5049 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
5050 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
5051 | nil here means use current buffer's major mode."); | |
5052 | ||
5053 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 5054 | make_number (Lisp_Symbol), |
1ab256cb RM |
5055 | "Symbol for current buffer's major mode."); |
5056 | ||
5057 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 5058 | make_number (Lisp_String), |
1ab256cb RM |
5059 | "Pretty name of current buffer's major mode (a string)."); |
5060 | ||
0fa3ba92 | 5061 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
5062 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
5063 | Automatically becomes buffer-local when set in any fashion."); | |
5064 | ||
5065 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 5066 | Qnil, |
5ed62574 | 5067 | "*Non-nil if searches and matches should ignore case.\n\ |
1ab256cb RM |
5068 | Automatically becomes buffer-local when set in any fashion."); |
5069 | ||
5070 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 5071 | make_number (Lisp_Int), |
1ab256cb RM |
5072 | "*Column beyond which automatic line-wrapping should happen.\n\ |
5073 | Automatically becomes buffer-local when set in any fashion."); | |
5074 | ||
5075 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 5076 | make_number (Lisp_Int), |
1ab256cb RM |
5077 | "*Column for the default indent-line-function to indent to.\n\ |
5078 | Linefeed indents to this column in Fundamental mode.\n\ | |
5079 | Automatically becomes buffer-local when set in any fashion."); | |
5080 | ||
5081 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 5082 | make_number (Lisp_Int), |
1ab256cb RM |
5083 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
5084 | Automatically becomes buffer-local when set in any fashion."); | |
5085 | ||
0fa3ba92 | 5086 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb | 5087 | "*Non-nil means display control chars with uparrow.\n\ |
6a99d31d | 5088 | A value of nil means use backslash and octal digits.\n\ |
1ab256cb RM |
5089 | Automatically becomes buffer-local when set in any fashion.\n\ |
5090 | This variable does not apply to characters whose display is specified\n\ | |
5091 | in the current display table (if there is one)."); | |
5092 | ||
3b06f880 | 5093 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf KH |
5094 | ¤t_buffer->enable_multibyte_characters, |
5095 | make_number (-1), | |
36bb26f7 | 5096 | "Non-nil means the buffer contents are regarded as multi-byte characters.\n\ |
ed218f73 | 5097 | Otherwise they are regarded as unibyte. This affects the display,\n\ |
53fe786d RS |
5098 | file I/O and the behavior of various editing commands.\n\ |
5099 | \n\ | |
5100 | This variable is buffer-local but you cannot set it directly;\n\ | |
5101 | use the function `set-buffer-multibyte' to change a buffer's representation.\n\ | |
5102 | Changing its default value with `setq-default' is supported.\n\ | |
5103 | See also variable `default-enable-multibyte-characters' and Info node\n\ | |
5104 | `(elisp)Text Representations'."); | |
3b06f880 | 5105 | |
c71b5d9b KH |
5106 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
5107 | ¤t_buffer->buffer_file_coding_system, Qnil, | |
5108 | "Coding system to be used for encoding the buffer contents on saving.\n\ | |
940daec1 RS |
5109 | This variable applies to saving the buffer, and also to `write-region'\n\ |
5110 | and other functions that use `write-region'.\n\ | |
5111 | It does not apply to sending output to subprocesses, however.\n\ | |
5112 | \n\ | |
5113 | If this is nil, the buffer is saved without any code conversion\n\ | |
5114 | unless some coding system is specified in `file-coding-system-alist'\n\ | |
c71b5d9b KH |
5115 | for the buffer file.\n\ |
5116 | \n\ | |
940daec1 RS |
5117 | The variable `coding-system-for-write', if non-nil, overrides this variable.\n\ |
5118 | \n\ | |
c71b5d9b KH |
5119 | This variable is never applied to a way of decoding\n\ |
5120 | a file while reading it."); | |
5121 | ||
3b06f880 KH |
5122 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
5123 | Qnil, | |
5124 | "*Non-nil means lines in the buffer are displayed right to left."); | |
5125 | ||
0fa3ba92 | 5126 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
5127 | "*Non-nil means do not display continuation lines;\n\ |
5128 | give each line of text one screen line.\n\ | |
5129 | Automatically becomes buffer-local when set in any fashion.\n\ | |
5130 | \n\ | |
5131 | Note that this is overridden by the variable\n\ | |
5132 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 5133 | and this buffer is not full-frame width."); |
1ab256cb | 5134 | |
f7975d07 | 5135 | #ifdef DOS_NT |
54ad07d3 RS |
5136 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
5137 | Qnil, | |
006d3d34 RS |
5138 | "Non-nil if the visited file is a binary file.\n\ |
5139 | This variable is meaningful on MS-DOG and Windows NT.\n\ | |
5140 | On those systems, it is automatically local in every buffer.\n\ | |
e0585c64 | 5141 | On other systems, this variable is normally always nil."); |
54ad07d3 RS |
5142 | #endif |
5143 | ||
1ab256cb | 5144 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 5145 | make_number (Lisp_String), |
1ab256cb RM |
5146 | "Name of default directory of current buffer. Should end with slash.\n\ |
5147 | Each buffer has its own value of this variable."); | |
5148 | ||
5149 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 5150 | Qnil, |
1ab256cb | 5151 | "Function called (if non-nil) to perform auto-fill.\n\ |
139f13a7 | 5152 | It is called after self-inserting any character specified in\n\ |
6c9a7472 | 5153 | the `auto-fill-chars' table.\n\ |
1ab256cb | 5154 | Each buffer has its own value of this variable.\n\ |
54158e68 KH |
5155 | NOTE: This variable is not a hook;\n\ |
5156 | its value may not be a list of functions."); | |
1ab256cb RM |
5157 | |
5158 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 5159 | make_number (Lisp_String), |
1ab256cb RM |
5160 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
5161 | Each buffer has its own value of this variable."); | |
5162 | ||
f6ed2e84 RS |
5163 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
5164 | make_number (Lisp_String), | |
bb4c204e | 5165 | "Abbreviated truename of file visited in current buffer, or nil if none.\n\ |
b1c03e64 RS |
5166 | The truename of a file is calculated by `file-truename'\n\ |
5167 | and then abbreviated with `abbreviate-file-name'.\n\ | |
f6ed2e84 RS |
5168 | Each buffer has its own value of this variable."); |
5169 | ||
1ab256cb | 5170 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5171 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 5172 | make_number (Lisp_String), |
1ab256cb RM |
5173 | "Name of file for auto-saving current buffer,\n\ |
5174 | or nil if buffer should not be auto-saved.\n\ | |
5175 | Each buffer has its own value of this variable."); | |
5176 | ||
0fa3ba92 | 5177 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
5178 | "Non-nil if this buffer is read-only.\n\ |
5179 | Each buffer has its own value of this variable."); | |
5180 | ||
0fa3ba92 | 5181 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
5182 | "Non-nil if this buffer's file has been backed up.\n\ |
5183 | Backing up is done before the first time the file is saved.\n\ | |
5184 | Each buffer has its own value of this variable."); | |
5185 | ||
5186 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 5187 | make_number (Lisp_Int), |
1ab256cb RM |
5188 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
5189 | 0 initially.\n\ | |
5190 | Each buffer has its own value of this variable."); | |
5191 | ||
5192 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 5193 | Qnil, |
1ab256cb RM |
5194 | "Non-nil enables selective display:\n\ |
5195 | Integer N as value means display only lines\n\ | |
5196 | that start with less than n columns of space.\n\ | |
5197 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
5198 | Then ^M's in the file are written into files as newlines.\n\n\ | |
5199 | Automatically becomes buffer-local when set in any fashion."); | |
5200 | ||
5201 | #ifndef old | |
5202 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
5203 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 5204 | Qnil, |
1ab256cb RM |
5205 | "t means display ... on previous line when a line is invisible.\n\ |
5206 | Automatically becomes buffer-local when set in any fashion."); | |
5207 | #endif | |
5208 | ||
0fa3ba92 | 5209 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 5210 | "Non-nil if self-insertion should replace existing text.\n\ |
5e05d0a5 RS |
5211 | The value should be one of `overwrite-mode-textual',\n\ |
5212 | `overwrite-mode-binary', or nil.\n\ | |
5213 | If it is `overwrite-mode-textual', self-insertion still\n\ | |
6bbb0d4a | 5214 | inserts at the end of a line, and inserts when point is before a tab,\n\ |
2e94b813 | 5215 | until the tab is filled in.\n\ |
6bbb0d4a | 5216 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
5217 | Automatically becomes buffer-local when set in any fashion."); |
5218 | ||
54939090 RS |
5219 | #if 0 /* The doc string is too long for some compilers, |
5220 | but make-docfile can find it in this comment. */ | |
1ab256cb | 5221 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 5222 | Qnil, |
1ab256cb RM |
5223 | "Display table that controls display of the contents of current buffer.\n\ |
5224 | Automatically becomes buffer-local when set in any fashion.\n\ | |
6fdc249f EN |
5225 | The display table is a char-table created with `make-display-table'.\n\ |
5226 | The ordinary char-table elements control how to display each possible text\n\ | |
5227 | character. Each value should be a vector of characters or nil;\n\ | |
1ab256cb | 5228 | nil means display the character in the default fashion.\n\ |
6fdc249f EN |
5229 | There are six extra slots to control the display of\n\ |
5230 | the end of a truncated screen line (extra-slot 0, a single character);\n\ | |
5231 | the end of a continued line (extra-slot 1, a single character);\n\ | |
6158b3b0 | 5232 | the escape character used to display character codes in octal\n\ |
6fdc249f EN |
5233 | (extra-slot 2, a single character);\n\ |
5234 | the character used as an arrow for control characters (extra-slot 3,\n\ | |
6158b3b0 | 5235 | a single character);\n\ |
6fdc249f | 5236 | the decoration indicating the presence of invisible lines (extra-slot 4,\n\ |
a45e35e1 JB |
5237 | a vector of characters);\n\ |
5238 | the character used to draw the border between side-by-side windows\n\ | |
6fdc249f EN |
5239 | (extra-slot 5, a single character).\n\ |
5240 | See also the functions `display-table-slot' and `set-display-table-slot'.\n\ | |
1ab256cb RM |
5241 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
5242 | Each window can have its own, overriding display table."); | |
54939090 RS |
5243 | #endif |
5244 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 5245 | Qnil, 0); |
1ab256cb | 5246 | |
0552666b GM |
5247 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_width, |
5248 | Qnil, | |
5249 | "*Width of left marginal area for display of a buffer.\n\ | |
5250 | Automatically becomes buffer-local when set in any fashion.\n\ | |
5251 | A value of nil means no marginal area."); | |
5252 | ||
5253 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_width, | |
5254 | Qnil, | |
5255 | "*Width of right marginal area for display of a buffer.\n\ | |
5256 | Automatically becomes buffer-local when set in any fashion.\n\ | |
5257 | A value of nil means no marginal area."); | |
5258 | ||
5259 | DEFVAR_PER_BUFFER ("indicate-empty-lines", | |
5260 | ¤t_buffer->indicate_empty_lines, Qnil, | |
9d1ee976 GM |
5261 | "*Visually indicate empty lines after the buffer end.\n\ |
5262 | If non-nil, a bitmap is displayed in the left fringe of a window on\n\ | |
5263 | window-systems.\n\ | |
0552666b GM |
5264 | Automatically becomes buffer-local when set in any fashion.\n"); |
5265 | ||
5266 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", | |
5267 | ¤t_buffer->scroll_up_aggressively, Qnil, | |
5268 | "*If a number, scroll display up aggressively.\n\ | |
5269 | If scrolling a window because point is above the window start, choose\n\ | |
5270 | a new window start so that point ends up that fraction of the window's\n\ | |
9b47cfe0 | 5271 | height from the top of the window.\n\ |
0552666b GM |
5272 | Automatically becomes buffer-local when set in any fashion."); |
5273 | ||
5274 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", | |
5275 | ¤t_buffer->scroll_down_aggressively, Qnil, | |
5276 | "*If a number, scroll display down aggressively.\n\ | |
5277 | If scrolling a window because point is below the window end, choose\n\ | |
5278 | a new window start so that point ends up that fraction of the window's\n\ | |
9b47cfe0 | 5279 | height from the bottom of the window.\n\ |
0552666b GM |
5280 | Automatically becomes buffer-local when set in any fashion."); |
5281 | ||
1ab256cb RM |
5282 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5283 | "Don't ask."); | |
5284 | */ | |
1ab256cb | 5285 | |
5f079267 RS |
5286 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
5287 | "List of functions to call before each text change.\n\ | |
5288 | Two arguments are passed to each function: the positions of\n\ | |
5289 | the beginning and end of the range of old text to be changed.\n\ | |
5290 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
5291 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
5292 | \n\ |
5293 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
5294 | don't call any before-change or after-change functions.\n\ |
5295 | That's because these variables are temporarily set to nil.\n\ | |
5296 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
5297 | these variables. See the Emacs Lisp manual for a way of\n\ | |
9ebc22d4 RS |
5298 | accomplishing an equivalent result by using other variables.\n\ |
5299 | \n\ | |
5300 | If an unhandled error happens in running these functions,\n\ | |
5301 | the variable's value remains nil. That prevents the error\n\ | |
5302 | from happening repeatedly and making Emacs nonfunctional."); | |
5f079267 RS |
5303 | Vbefore_change_functions = Qnil; |
5304 | ||
5305 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
5306 | "List of function to call after each text change.\n\ | |
5307 | Three arguments are passed to each function: the positions of\n\ | |
5308 | the beginning and end of the range of changed text,\n\ | |
839dd834 | 5309 | and the length in bytes of the pre-change text replaced by that range.\n\ |
5f079267 | 5310 | \(For an insertion, the pre-change length is zero;\n\ |
839dd834 | 5311 | for a deletion, that length is the number of bytes deleted,\n\ |
5f079267 RS |
5312 | and the post-change beginning and end are at the same place.)\n\ |
5313 | \n\ | |
5314 | Buffer changes made while executing the `after-change-functions'\n\ | |
b86344d0 RS |
5315 | don't call any before-change or after-change functions.\n\ |
5316 | That's because these variables are temporarily set to nil.\n\ | |
5317 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
5318 | these variables. See the Emacs Lisp manual for a way of\n\ | |
9ebc22d4 RS |
5319 | accomplishing an equivalent result by using other variables.\n\ |
5320 | \n\ | |
5321 | If an unhandled error happens in running these functions,\n\ | |
5322 | the variable's value remains nil. That prevents the error\n\ | |
5323 | from happening repeatedly and making Emacs nonfunctional."); | |
5f079267 RS |
5324 | Vafter_change_functions = Qnil; |
5325 | ||
dbc4e1c1 JB |
5326 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
5327 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
5328 | The functions are run using the `run-hooks' function."); | |
5329 | Vfirst_change_hook = Qnil; | |
1ab256cb | 5330 | |
54939090 RS |
5331 | #if 0 /* The doc string is too long for some compilers, |
5332 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 5333 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb | 5334 | "List of undo entries in current buffer.\n\ |
3fd364db | 5335 | This variable is always local in all buffers.\n\ |
1ab256cb RM |
5336 | Recent changes come first; older changes follow newer.\n\ |
5337 | \n\ | |
630f4018 KH |
5338 | An entry (BEG . END) represents an insertion which begins at\n\ |
5339 | position BEG and ends at position END.\n\ | |
1ab256cb RM |
5340 | \n\ |
5341 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
5342 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
5343 | of the text being deleted; if negative, point was at the end.\n\ | |
5344 | \n\ | |
6c0df54a RS |
5345 | An entry (t HIGH . LOW) indicates that the buffer previously had\n\ |
5346 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\ | |
5347 | of the visited file's modification time, as of that time. If the\n\ | |
5348 | modification time of the most recent save is different, this entry is\n\ | |
1ab256cb RM |
5349 | obsolete.\n\ |
5350 | \n\ | |
6c0df54a RS |
5351 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\ |
5352 | was modified between BEG and END. PROPERTY is the property name,\n\ | |
5353 | and VALUE is the old value.\n\ | |
483c1fd3 | 5354 | \n\ |
da1c183c RS |
5355 | An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\ |
5356 | was adjusted in position by the offset DISTANCE (an integer).\n\ | |
5357 | \n\ | |
bec44fd6 JB |
5358 | An entry of the form POSITION indicates that point was at the buffer\n\ |
5359 | location given by the integer. Undoing an entry of this form places\n\ | |
5360 | point at POSITION.\n\ | |
5361 | \n\ | |
1ab256cb RM |
5362 | nil marks undo boundaries. The undo command treats the changes\n\ |
5363 | between two undo boundaries as a single step to be undone.\n\ | |
5364 | \n\ | |
bec44fd6 | 5365 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
5366 | #endif |
5367 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 5368 | 0); |
1ab256cb | 5369 | |
c48f61ef RS |
5370 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
5371 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
5372 | Automatically local in all buffers."); | |
5373 | ||
28e969dd | 5374 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
f0c5b712 JB |
5375 | "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\ |
5376 | This variable is buffer-local, in all buffers.\n\ | |
28e969dd | 5377 | \n\ |
f0c5b712 JB |
5378 | Normally, the line-motion functions work by scanning the buffer for\n\ |
5379 | newlines. Columnar operations (like move-to-column and\n\ | |
5380 | compute-motion) also work by scanning the buffer, summing character\n\ | |
5381 | widths as they go. This works well for ordinary text, but if the\n\ | |
28e969dd | 5382 | buffer's lines are very long (say, more than 500 characters), these\n\ |
f0c5b712 JB |
5383 | motion functions will take longer to execute. Emacs may also take\n\ |
5384 | longer to update the display.\n\ | |
28e969dd | 5385 | \n\ |
f0c5b712 JB |
5386 | If cache-long-line-scans is non-nil, these motion functions cache the\n\ |
5387 | results of their scans, and consult the cache to avoid rescanning\n\ | |
5388 | regions of the buffer until the text is modified. The caches are most\n\ | |
5389 | beneficial when they prevent the most searching---that is, when the\n\ | |
5390 | buffer contains long lines and large regions of characters with the\n\ | |
5391 | same, fixed screen width.\n\ | |
28e969dd | 5392 | \n\ |
f0c5b712 JB |
5393 | When cache-long-line-scans is non-nil, processing short lines will\n\ |
5394 | become slightly slower (because of the overhead of consulting the\n\ | |
5395 | cache), and the caches will use memory roughly proportional to the\n\ | |
5396 | number of newlines and characters whose screen width varies.\n\ | |
5397 | \n\ | |
5398 | The caches require no explicit maintenance; their accuracy is\n\ | |
5399 | maintained internally by the Emacs primitives. Enabling or disabling\n\ | |
5400 | the cache should not affect the behavior of any of the motion\n\ | |
5401 | functions; it should only affect their performance."); | |
28e969dd | 5402 | |
943e065b | 5403 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
3fd364db RS |
5404 | "Value of point before the last series of scroll operations, or nil.\n\ |
5405 | This variable is always local in all buffers."); | |
943e065b | 5406 | |
be9aafdd BG |
5407 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
5408 | "List of formats to use when saving this buffer.\n\ | |
3fd364db | 5409 | This variable is always local in all buffers.\n\ |
be9aafdd BG |
5410 | Formats are defined by `format-alist'. This variable is\n\ |
5411 | set when a file is visited. Automatically local in all buffers."); | |
5412 | ||
3cb719bd RS |
5413 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
5414 | ¤t_buffer->invisibility_spec, Qnil, | |
5415 | "Invisibility spec of this buffer.\n\ | |
3fd364db | 5416 | This variable is always local in all buffers.\n\ |
3cb719bd RS |
5417 | The default is t, which means that text is invisible\n\ |
5418 | if it has a non-nil `invisible' property.\n\ | |
5419 | If the value is a list, a text character is invisible if its `invisible'\n\ | |
5420 | property is an element in that list.\n\ | |
554216ad KH |
5421 | If an element is a cons cell of the form (PROP . ELLIPSIS),\n\ |
5422 | then characters with property value PROP are invisible,\n\ | |
3cb719bd RS |
5423 | and they have an ellipsis as well if ELLIPSIS is non-nil."); |
5424 | ||
7962a441 RS |
5425 | DEFVAR_PER_BUFFER ("buffer-display-count", |
5426 | ¤t_buffer->display_count, Qnil, | |
3fd364db RS |
5427 | "A number incremented each time this buffer is displayed in a window.\n\ |
5428 | This variable is always local in all buffers.\n\ | |
5429 | The function `set-window-buffer increments it."); | |
5430 | ||
5431 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
5432 | ¤t_buffer->display_time, Qnil, | |
5433 | "Time stamp updated each time this buffer is displayed in a window.\n\ | |
5434 | This variable is always local in all buffers.\n\ | |
5435 | The function `set-window-buffer' updates this variable\n\ | |
5436 | to the value obtained by calling `current-time'.\n\ | |
5437 | If the buffer has never been shown in a window, the value is nil."); | |
7962a441 | 5438 | |
c48f61ef | 5439 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
319c537c RS |
5440 | "*Non-nil means deactivate the mark when the buffer contents change.\n\ |
5441 | Non-nil also enables highlighting of the region whenever the mark is active.\n\ | |
5442 | The variable `highlight-nonselected-windows' controls whether to highlight\n\ | |
5443 | all windows or just the selected window."); | |
c48f61ef RS |
5444 | Vtransient_mark_mode = Qnil; |
5445 | ||
0a4469c9 | 5446 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
5447 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
5448 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
5449 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
5450 | and disregard a `read-only' text property if the property value\n\ | |
5451 | is a member of the list."); | |
5452 | Vinhibit_read_only = Qnil; | |
5453 | ||
bb2ec976 GM |
5454 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
5455 | "Cursor to use in window displaying this buffer.\n\ | |
5456 | Values are interpreted as follows:\n\ | |
5457 | \n\ | |
5458 | t use the cursor specified for the frame\n\ | |
5459 | nil don't display a cursor\n\ | |
5460 | `bar' display a bar cursor with default width\n\ | |
5461 | (bar . WIDTH) display a bar cursor with width WIDTH\n\ | |
5462 | others display a box cursor."); | |
5463 | ||
a3bbced0 GM |
5464 | DEFVAR_PER_BUFFER ("line-spacing", |
5465 | ¤t_buffer->extra_line_spacing, Qnil, | |
5466 | "Additional space to put between lines when displaying a buffer.\n\ | |
5467 | The space is measured in pixels, and put below lines on window systems."); | |
5468 | ||
dcdffbf6 RS |
5469 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
5470 | "List of functions called with no args to query before killing a buffer."); | |
5471 | Vkill_buffer_query_functions = Qnil; | |
5472 | ||
0dc88e60 | 5473 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
5474 | defsubr (&Sbuffer_list); |
5475 | defsubr (&Sget_buffer); | |
5476 | defsubr (&Sget_file_buffer); | |
5477 | defsubr (&Sget_buffer_create); | |
336cd056 | 5478 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 5479 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
5480 | defsubr (&Sbuffer_name); |
5481 | /*defsubr (&Sbuffer_number);*/ | |
5482 | defsubr (&Sbuffer_file_name); | |
336cd056 | 5483 | defsubr (&Sbuffer_base_buffer); |
1ab256cb RM |
5484 | defsubr (&Sbuffer_local_variables); |
5485 | defsubr (&Sbuffer_modified_p); | |
5486 | defsubr (&Sset_buffer_modified_p); | |
5487 | defsubr (&Sbuffer_modified_tick); | |
5488 | defsubr (&Srename_buffer); | |
5489 | defsubr (&Sother_buffer); | |
5490 | defsubr (&Sbuffer_disable_undo); | |
5491 | defsubr (&Sbuffer_enable_undo); | |
5492 | defsubr (&Skill_buffer); | |
a9ee7a59 | 5493 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
5494 | defsubr (&Sswitch_to_buffer); |
5495 | defsubr (&Spop_to_buffer); | |
5496 | defsubr (&Scurrent_buffer); | |
5497 | defsubr (&Sset_buffer); | |
5498 | defsubr (&Sbarf_if_buffer_read_only); | |
5499 | defsubr (&Sbury_buffer); | |
3ac81adb RS |
5500 | defsubr (&Serase_buffer); |
5501 | defsubr (&Sset_buffer_multibyte); | |
1ab256cb | 5502 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 5503 | |
52f8ec73 | 5504 | defsubr (&Soverlayp); |
2eec3b4e RS |
5505 | defsubr (&Smake_overlay); |
5506 | defsubr (&Sdelete_overlay); | |
5507 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
5508 | defsubr (&Soverlay_start); |
5509 | defsubr (&Soverlay_end); | |
5510 | defsubr (&Soverlay_buffer); | |
5511 | defsubr (&Soverlay_properties); | |
2eec3b4e | 5512 | defsubr (&Soverlays_at); |
74514898 | 5513 | defsubr (&Soverlays_in); |
2eec3b4e | 5514 | defsubr (&Snext_overlay_change); |
239c932b | 5515 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
5516 | defsubr (&Soverlay_recenter); |
5517 | defsubr (&Soverlay_lists); | |
5518 | defsubr (&Soverlay_get); | |
5519 | defsubr (&Soverlay_put); | |
a8c21b48 | 5520 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
5521 | } |
5522 | ||
dfcf069d | 5523 | void |
1ab256cb RM |
5524 | keys_of_buffer () |
5525 | { | |
5526 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
5527 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
5528 | |
5529 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
5530 | initialized when that function gets called. */ | |
5531 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 5532 | } |