|
428
|
1 /* Markers: examining, setting and killing.
|
|
|
2 Copyright (C) 1985, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
|
|
800
|
3 Copyright (C) 2002 Ben Wing.
|
|
428
|
4
|
|
|
5 This file is part of XEmacs.
|
|
|
6
|
|
|
7 XEmacs is free software; you can redistribute it and/or modify it
|
|
|
8 under the terms of the GNU General Public License as published by the
|
|
|
9 Free Software Foundation; either version 2, or (at your option) any
|
|
|
10 later version.
|
|
|
11
|
|
|
12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
|
|
|
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
|
15 for more details.
|
|
|
16
|
|
|
17 You should have received a copy of the GNU General Public License
|
|
|
18 along with XEmacs; see the file COPYING. If not, write to
|
|
|
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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|
|
20 Boston, MA 02111-1307, USA. */
|
|
|
21
|
|
|
22 /* Synched up with: FSF 19.30. */
|
|
|
23
|
|
|
24 /* This file has been Mule-ized. */
|
|
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25
|
|
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26 /* Note that markers are currently kept in an unordered list.
|
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27 This means that marker operations may be inefficient if
|
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|
28 there are a bunch of markers in the buffer. This probably
|
|
|
29 won't have a significant impact on redisplay (which uses
|
|
|
30 markers), but if it does, it wouldn't be too hard to change
|
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|
31 to an ordered gap array. (Just copy the code from extents.c.)
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32 */
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33
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|
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34 #include <config.h>
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|
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35 #include "lisp.h"
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|
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36
|
|
|
37 #include "buffer.h"
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38
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|
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39 static Lisp_Object
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40 mark_marker (Lisp_Object obj)
|
|
|
41 {
|
|
440
|
42 Lisp_Marker *marker = XMARKER (obj);
|
|
428
|
43 Lisp_Object buf;
|
|
|
44 /* DO NOT mark through the marker's chain.
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|
45 The buffer's markers chain does not preserve markers from gc;
|
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|
46 Instead, markers are removed from the chain when they are freed
|
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|
47 by gc.
|
|
|
48 */
|
|
|
49 if (!marker->buffer)
|
|
|
50 return (Qnil);
|
|
|
51
|
|
793
|
52 buf = wrap_buffer (marker->buffer);
|
|
428
|
53 return (buf);
|
|
|
54 }
|
|
|
55
|
|
|
56 static void
|
|
2286
|
57 print_marker (Lisp_Object obj, Lisp_Object printcharfun,
|
|
|
58 int UNUSED (escapeflag))
|
|
428
|
59 {
|
|
440
|
60 Lisp_Marker *marker = XMARKER (obj);
|
|
428
|
61
|
|
|
62 if (print_readably)
|
|
563
|
63 printing_unreadable_object ("#<marker 0x%lx>", (long) marker);
|
|
428
|
64
|
|
826
|
65 write_c_string (printcharfun, GETTEXT ("#<marker "));
|
|
428
|
66 if (!marker->buffer)
|
|
826
|
67 write_c_string (printcharfun, GETTEXT ("in no buffer"));
|
|
428
|
68 else
|
|
|
69 {
|
|
826
|
70 write_fmt_string (printcharfun, "at %ld in ",
|
|
|
71 (long) marker_position (obj));
|
|
428
|
72 print_internal (marker->buffer->name, printcharfun, 0);
|
|
|
73 }
|
|
826
|
74 if (marker->insertion_type)
|
|
|
75 write_c_string (printcharfun, " insertion-type=t");
|
|
800
|
76 write_fmt_string (printcharfun, " 0x%lx>", (long) marker);
|
|
428
|
77 }
|
|
|
78
|
|
|
79 static int
|
|
2286
|
80 marker_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth))
|
|
428
|
81 {
|
|
440
|
82 Lisp_Marker *marker1 = XMARKER (obj1);
|
|
|
83 Lisp_Marker *marker2 = XMARKER (obj2);
|
|
428
|
84
|
|
|
85 return ((marker1->buffer == marker2->buffer) &&
|
|
665
|
86 (marker1->membpos == marker2->membpos ||
|
|
428
|
87 /* All markers pointing nowhere are equal */
|
|
|
88 !marker1->buffer));
|
|
|
89 }
|
|
|
90
|
|
2515
|
91 static Hashcode
|
|
2286
|
92 marker_hash (Lisp_Object obj, int UNUSED (depth))
|
|
428
|
93 {
|
|
2515
|
94 Hashcode hash = (Hashcode) XMARKER (obj)->buffer;
|
|
428
|
95 if (hash)
|
|
665
|
96 hash = HASH2 (hash, XMARKER (obj)->membpos);
|
|
428
|
97 return hash;
|
|
|
98 }
|
|
|
99
|
|
1204
|
100 static const struct memory_description marker_description[] = {
|
|
2551
|
101 { XD_LISP_OBJECT, offsetof (Lisp_Marker, next), 0, { 0 }, XD_FLAG_NO_KKCC },
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|
|
102 { XD_LISP_OBJECT, offsetof (Lisp_Marker, prev), 0, { 0 }, XD_FLAG_NO_KKCC },
|
|
440
|
103 { XD_LISP_OBJECT, offsetof (Lisp_Marker, buffer) },
|
|
428
|
104 { XD_END }
|
|
|
105 };
|
|
|
106
|
|
3263
|
107 #ifdef NEW_GC
|
|
2720
|
108 static void
|
|
|
109 finalize_marker (void *header, int for_disksave)
|
|
|
110 {
|
|
|
111 if (!for_disksave)
|
|
|
112 {
|
|
|
113 Lisp_Object tem = wrap_marker (header);
|
|
|
114 unchain_marker (tem);
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|
|
115 }
|
|
|
116 }
|
|
|
117
|
|
|
118 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("marker", marker,
|
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|
119 1, /*dumpable-flag*/
|
|
|
120 mark_marker, print_marker,
|
|
|
121 finalize_marker,
|
|
|
122 marker_equal, marker_hash,
|
|
|
123 marker_description, Lisp_Marker);
|
|
3263
|
124 #else /* not NEW_GC */
|
|
934
|
125 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("marker", marker,
|
|
|
126 1, /*dumpable-flag*/
|
|
|
127 mark_marker, print_marker, 0,
|
|
1204
|
128 marker_equal, marker_hash,
|
|
|
129 marker_description, Lisp_Marker);
|
|
3263
|
130 #endif /* not NEW_GC */
|
|
428
|
131
|
|
|
132 /* Operations on markers. */
|
|
|
133
|
|
|
134 DEFUN ("marker-buffer", Fmarker_buffer, 1, 1, 0, /*
|
|
|
135 Return the buffer that MARKER points into, or nil if none.
|
|
|
136 Return nil if MARKER points into a dead buffer or doesn't point anywhere.
|
|
|
137 */
|
|
|
138 (marker))
|
|
|
139 {
|
|
|
140 struct buffer *buf;
|
|
|
141 CHECK_MARKER (marker);
|
|
|
142 /* Return marker's buffer only if it is not dead. */
|
|
|
143 if ((buf = XMARKER (marker)->buffer) && BUFFER_LIVE_P (buf))
|
|
|
144 {
|
|
793
|
145 return wrap_buffer (buf);
|
|
428
|
146 }
|
|
|
147 return Qnil;
|
|
|
148 }
|
|
|
149
|
|
|
150 DEFUN ("marker-position", Fmarker_position, 1, 1, 0, /*
|
|
|
151 Return the position MARKER points at, as a character number.
|
|
|
152 Return `nil' if marker doesn't point anywhere.
|
|
|
153 */
|
|
|
154 (marker))
|
|
|
155 {
|
|
|
156 CHECK_MARKER (marker);
|
|
|
157 return XMARKER (marker)->buffer ? make_int (marker_position (marker)) : Qnil;
|
|
|
158 }
|
|
|
159
|
|
|
160 #if 0 /* useful debugging function */
|
|
|
161
|
|
|
162 static void
|
|
|
163 check_marker_circularities (struct buffer *buf)
|
|
|
164 {
|
|
440
|
165 Lisp_Marker *tortoise, *hare;
|
|
428
|
166
|
|
|
167 tortoise = BUF_MARKERS (buf);
|
|
|
168 hare = tortoise;
|
|
|
169
|
|
|
170 if (!tortoise)
|
|
|
171 return;
|
|
|
172
|
|
|
173 while (1)
|
|
|
174 {
|
|
|
175 assert (hare->buffer == buf);
|
|
|
176 hare = hare->next;
|
|
|
177 if (!hare)
|
|
|
178 return;
|
|
|
179 assert (hare->buffer == buf);
|
|
|
180 hare = hare->next;
|
|
|
181 if (!hare)
|
|
|
182 return;
|
|
|
183 tortoise = tortoise->next;
|
|
|
184 assert (tortoise != hare);
|
|
|
185 }
|
|
|
186 }
|
|
|
187
|
|
|
188 #endif
|
|
|
189
|
|
|
190 static Lisp_Object
|
|
444
|
191 set_marker_internal (Lisp_Object marker, Lisp_Object position,
|
|
|
192 Lisp_Object buffer, int restricted_p)
|
|
428
|
193 {
|
|
665
|
194 Charbpos charno;
|
|
428
|
195 struct buffer *b;
|
|
440
|
196 Lisp_Marker *m;
|
|
428
|
197 int point_p;
|
|
|
198
|
|
|
199 CHECK_MARKER (marker);
|
|
|
200
|
|
|
201 point_p = POINT_MARKER_P (marker);
|
|
|
202
|
|
|
203 /* If position is nil or a marker that points nowhere,
|
|
|
204 make this marker point nowhere. */
|
|
444
|
205 if (NILP (position) ||
|
|
|
206 (MARKERP (position) && !XMARKER (position)->buffer))
|
|
428
|
207 {
|
|
|
208 if (point_p)
|
|
563
|
209 invalid_operation ("Can't make point-marker point nowhere",
|
|
|
210 marker);
|
|
428
|
211 if (XMARKER (marker)->buffer)
|
|
|
212 unchain_marker (marker);
|
|
|
213 return marker;
|
|
|
214 }
|
|
|
215
|
|
444
|
216 CHECK_INT_COERCE_MARKER (position);
|
|
428
|
217 if (NILP (buffer))
|
|
|
218 b = current_buffer;
|
|
|
219 else
|
|
|
220 {
|
|
|
221 CHECK_BUFFER (buffer);
|
|
|
222 b = XBUFFER (buffer);
|
|
|
223 /* If buffer is dead, set marker to point nowhere. */
|
|
|
224 if (!BUFFER_LIVE_P (XBUFFER (buffer)))
|
|
|
225 {
|
|
|
226 if (point_p)
|
|
563
|
227 invalid_operation
|
|
428
|
228 ("Can't move point-marker in a killed buffer", marker);
|
|
|
229 if (XMARKER (marker)->buffer)
|
|
|
230 unchain_marker (marker);
|
|
|
231 return marker;
|
|
|
232 }
|
|
|
233 }
|
|
|
234
|
|
444
|
235 charno = XINT (position);
|
|
428
|
236 m = XMARKER (marker);
|
|
|
237
|
|
|
238 if (restricted_p)
|
|
|
239 {
|
|
|
240 if (charno < BUF_BEGV (b)) charno = BUF_BEGV (b);
|
|
|
241 if (charno > BUF_ZV (b)) charno = BUF_ZV (b);
|
|
|
242 }
|
|
|
243 else
|
|
|
244 {
|
|
|
245 if (charno < BUF_BEG (b)) charno = BUF_BEG (b);
|
|
|
246 if (charno > BUF_Z (b)) charno = BUF_Z (b);
|
|
|
247 }
|
|
|
248
|
|
|
249 if (point_p)
|
|
|
250 {
|
|
|
251 #ifndef moving_point_by_moving_its_marker_is_a_bug
|
|
|
252 BUF_SET_PT (b, charno); /* this will move the marker */
|
|
|
253 #else /* It's not a feature, so it must be a bug */
|
|
563
|
254 invalid_operation ("DEBUG: attempt to move point via point-marker",
|
|
|
255 marker);
|
|
428
|
256 #endif
|
|
|
257 }
|
|
|
258 else
|
|
|
259 {
|
|
665
|
260 m->membpos = charbpos_to_membpos (b, charno);
|
|
428
|
261 }
|
|
|
262
|
|
|
263 if (m->buffer != b)
|
|
|
264 {
|
|
|
265 if (point_p)
|
|
563
|
266 invalid_operation ("Can't change buffer of point-marker", marker);
|
|
428
|
267 if (m->buffer != 0)
|
|
|
268 unchain_marker (marker);
|
|
|
269 m->buffer = b;
|
|
|
270 marker_next (m) = BUF_MARKERS (b);
|
|
|
271 marker_prev (m) = 0;
|
|
|
272 if (BUF_MARKERS (b))
|
|
|
273 marker_prev (BUF_MARKERS (b)) = m;
|
|
|
274 BUF_MARKERS (b) = m;
|
|
|
275 }
|
|
|
276
|
|
|
277 return marker;
|
|
|
278 }
|
|
|
279
|
|
|
280
|
|
|
281 DEFUN ("set-marker", Fset_marker, 2, 3, 0, /*
|
|
444
|
282 Move MARKER to position POSITION in BUFFER.
|
|
|
283 POSITION can be a marker, an integer or nil. If POSITION is an
|
|
|
284 integer, make MARKER point before the POSITIONth character in BUFFER.
|
|
|
285 If POSITION is nil, makes MARKER point nowhere. Then it no longer
|
|
|
286 slows down editing in any buffer. If POSITION is less than 1, move
|
|
|
287 MARKER to the beginning of BUFFER. If POSITION is greater than the
|
|
|
288 size of BUFFER, move MARKER to the end of BUFFER.
|
|
428
|
289 BUFFER defaults to the current buffer.
|
|
444
|
290 If this marker was returned by (point-marker t), then changing its
|
|
|
291 position moves point. You cannot change its buffer or make it point
|
|
|
292 nowhere.
|
|
|
293 The return value is MARKER.
|
|
428
|
294 */
|
|
444
|
295 (marker, position, buffer))
|
|
428
|
296 {
|
|
444
|
297 return set_marker_internal (marker, position, buffer, 0);
|
|
428
|
298 }
|
|
|
299
|
|
|
300
|
|
|
301 /* This version of Fset_marker won't let the position
|
|
|
302 be outside the visible part. */
|
|
|
303 Lisp_Object
|
|
444
|
304 set_marker_restricted (Lisp_Object marker, Lisp_Object position,
|
|
|
305 Lisp_Object buffer)
|
|
428
|
306 {
|
|
444
|
307 return set_marker_internal (marker, position, buffer, 1);
|
|
428
|
308 }
|
|
|
309
|
|
|
310
|
|
|
311 /* This is called during garbage collection,
|
|
|
312 so we must be careful to ignore and preserve mark bits,
|
|
|
313 including those in chain fields of markers. */
|
|
|
314
|
|
|
315 void
|
|
|
316 unchain_marker (Lisp_Object m)
|
|
|
317 {
|
|
440
|
318 Lisp_Marker *marker = XMARKER (m);
|
|
428
|
319 struct buffer *b = marker->buffer;
|
|
|
320
|
|
|
321 if (b == 0)
|
|
|
322 return;
|
|
|
323
|
|
800
|
324 #ifdef ERROR_CHECK_STRUCTURES
|
|
428
|
325 assert (BUFFER_LIVE_P (b));
|
|
|
326 #endif
|
|
|
327
|
|
|
328 if (marker_next (marker))
|
|
|
329 marker_prev (marker_next (marker)) = marker_prev (marker);
|
|
|
330 if (marker_prev (marker))
|
|
|
331 marker_next (marker_prev (marker)) = marker_next (marker);
|
|
|
332 else
|
|
|
333 BUF_MARKERS (b) = marker_next (marker);
|
|
|
334
|
|
800
|
335 #ifdef ERROR_CHECK_STRUCTURES
|
|
428
|
336 assert (marker != XMARKER (b->point_marker));
|
|
|
337 #endif
|
|
|
338
|
|
|
339 marker->buffer = 0;
|
|
|
340 }
|
|
|
341
|
|
665
|
342 Bytebpos
|
|
826
|
343 byte_marker_position (Lisp_Object marker)
|
|
428
|
344 {
|
|
440
|
345 Lisp_Marker *m = XMARKER (marker);
|
|
428
|
346 struct buffer *buf = m->buffer;
|
|
665
|
347 Bytebpos pos;
|
|
428
|
348
|
|
|
349 if (!buf)
|
|
563
|
350 invalid_argument ("Marker does not point anywhere", Qunbound);
|
|
428
|
351
|
|
|
352 /* FSF claims that marker indices could end up denormalized, i.e.
|
|
|
353 in the gap. This is way bogus if it ever happens, and means
|
|
|
354 something fucked up elsewhere. Since I've overhauled all this
|
|
|
355 shit, I don't think this can happen. In any case, the following
|
|
|
356 macro has an assert() in it that will catch these denormalized
|
|
|
357 positions. */
|
|
665
|
358 pos = membpos_to_bytebpos (buf, m->membpos);
|
|
428
|
359
|
|
|
360 return pos;
|
|
|
361 }
|
|
|
362
|
|
665
|
363 Charbpos
|
|
428
|
364 marker_position (Lisp_Object marker)
|
|
|
365 {
|
|
|
366 struct buffer *buf = XMARKER (marker)->buffer;
|
|
|
367
|
|
|
368 if (!buf)
|
|
563
|
369 invalid_argument ("Marker does not point anywhere", Qunbound);
|
|
428
|
370
|
|
826
|
371 return bytebpos_to_charbpos (buf, byte_marker_position (marker));
|
|
428
|
372 }
|
|
|
373
|
|
|
374 void
|
|
826
|
375 set_byte_marker_position (Lisp_Object marker, Bytebpos pos)
|
|
428
|
376 {
|
|
440
|
377 Lisp_Marker *m = XMARKER (marker);
|
|
428
|
378 struct buffer *buf = m->buffer;
|
|
|
379
|
|
|
380 if (!buf)
|
|
563
|
381 invalid_argument ("Marker does not point anywhere", Qunbound);
|
|
428
|
382
|
|
665
|
383 m->membpos = bytebpos_to_membpos (buf, pos);
|
|
428
|
384 }
|
|
|
385
|
|
|
386 void
|
|
665
|
387 set_marker_position (Lisp_Object marker, Charbpos pos)
|
|
428
|
388 {
|
|
|
389 struct buffer *buf = XMARKER (marker)->buffer;
|
|
|
390
|
|
|
391 if (!buf)
|
|
563
|
392 invalid_argument ("Marker does not point anywhere", Qunbound);
|
|
428
|
393
|
|
826
|
394 set_byte_marker_position (marker, charbpos_to_bytebpos (buf, pos));
|
|
428
|
395 }
|
|
|
396
|
|
|
397 static Lisp_Object
|
|
|
398 copy_marker_1 (Lisp_Object marker, Lisp_Object type, int noseeum)
|
|
|
399 {
|
|
3025
|
400 REGISTER Lisp_Object new_;
|
|
428
|
401
|
|
|
402 while (1)
|
|
|
403 {
|
|
|
404 if (INTP (marker) || MARKERP (marker))
|
|
|
405 {
|
|
|
406 if (noseeum)
|
|
3025
|
407 new_ = noseeum_make_marker ();
|
|
428
|
408 else
|
|
3025
|
409 new_ = Fmake_marker ();
|
|
|
410 Fset_marker (new_, marker,
|
|
428
|
411 (MARKERP (marker) ? Fmarker_buffer (marker) : Qnil));
|
|
3025
|
412 XMARKER (new_)->insertion_type = !NILP (type);
|
|
|
413 return new_;
|
|
428
|
414 }
|
|
|
415 else
|
|
|
416 marker = wrong_type_argument (Qinteger_or_marker_p, marker);
|
|
|
417 }
|
|
|
418
|
|
1204
|
419 RETURN_NOT_REACHED (Qnil); /* not reached */
|
|
428
|
420 }
|
|
|
421
|
|
|
422 DEFUN ("copy-marker", Fcopy_marker, 1, 2, 0, /*
|
|
444
|
423 Return a new marker pointing at the same place as MARKER-OR-INTEGER.
|
|
|
424 If MARKER-OR-INTEGER is an integer, return a new marker pointing
|
|
428
|
425 at that position in the current buffer.
|
|
444
|
426 Optional argument MARKER-TYPE specifies the insertion type of the new
|
|
|
427 marker; see `marker-insertion-type'.
|
|
428
|
428 */
|
|
444
|
429 (marker_or_integer, marker_type))
|
|
428
|
430 {
|
|
444
|
431 return copy_marker_1 (marker_or_integer, marker_type, 0);
|
|
428
|
432 }
|
|
|
433
|
|
|
434 Lisp_Object
|
|
444
|
435 noseeum_copy_marker (Lisp_Object marker, Lisp_Object marker_type)
|
|
428
|
436 {
|
|
444
|
437 return copy_marker_1 (marker, marker_type, 1);
|
|
428
|
438 }
|
|
|
439
|
|
|
440 DEFUN ("marker-insertion-type", Fmarker_insertion_type, 1, 1, 0, /*
|
|
|
441 Return insertion type of MARKER: t if it stays after inserted text.
|
|
|
442 nil means the marker stays before text inserted there.
|
|
|
443 */
|
|
|
444 (marker))
|
|
|
445 {
|
|
|
446 CHECK_MARKER (marker);
|
|
|
447 return XMARKER (marker)->insertion_type ? Qt : Qnil;
|
|
|
448 }
|
|
|
449
|
|
|
450 DEFUN ("set-marker-insertion-type", Fset_marker_insertion_type, 2, 2, 0, /*
|
|
|
451 Set the insertion-type of MARKER to TYPE.
|
|
|
452 If TYPE is t, it means the marker advances when you insert text at it.
|
|
|
453 If TYPE is nil, it means the marker stays behind when you insert text at it.
|
|
|
454 */
|
|
|
455 (marker, type))
|
|
|
456 {
|
|
|
457 CHECK_MARKER (marker);
|
|
|
458
|
|
|
459 XMARKER (marker)->insertion_type = ! NILP (type);
|
|
|
460 return type;
|
|
|
461 }
|
|
|
462
|
|
|
463 /* #### What is the possible use of this? It looks quite useless to
|
|
|
464 me, because there is no way to find *which* markers are positioned
|
|
|
465 at POSITION. Additional bogosity bonus: (buffer-has-markers-at
|
|
|
466 (point)) will always return t because of the `point-marker'. The
|
|
|
467 same goes for the position of mark. Bletch!
|
|
|
468
|
|
|
469 Someone should discuss this with Stallman, but I don't have the
|
|
|
470 stomach. In fact, this function sucks so badly that I'm disabling
|
|
|
471 it by default (although I've debugged it). If you want to use it,
|
|
|
472 use extents instead. --hniksic */
|
|
|
473 #if 0
|
|
826
|
474 DEFUN ("buffer-has-markers-at", Fbuffer_has_markers_at, 1, 1, 0, /*
|
|
428
|
475 Return t if there are markers pointing at POSITION in the current buffer.
|
|
|
476 */
|
|
|
477 (position))
|
|
|
478 {
|
|
440
|
479 Lisp_Marker *marker;
|
|
665
|
480 Membpos pos;
|
|
428
|
481
|
|
665
|
482 /* A small optimization trick: convert POS to membpos now, rather
|
|
|
483 than converting every marker's memory index to charbpos. */
|
|
|
484 pos = bytebpos_to_membpos (current_buffer,
|
|
428
|
485 get_buffer_pos_byte (current_buffer, position,
|
|
|
486 GB_COERCE_RANGE));
|
|
|
487
|
|
|
488 for (marker = BUF_MARKERS (current_buffer);
|
|
|
489 marker;
|
|
|
490 marker = marker_next (marker))
|
|
|
491 {
|
|
665
|
492 /* We use marker->membpos, so we don't have to go through the
|
|
428
|
493 unwieldy operation of creating a Lisp_Object for
|
|
|
494 marker_position() every time around. */
|
|
665
|
495 if (marker->membpos == pos)
|
|
428
|
496 return Qt;
|
|
|
497 }
|
|
|
498
|
|
|
499 return Qnil;
|
|
|
500 }
|
|
|
501 #endif /* 0 */
|
|
|
502
|
|
|
503 #ifdef MEMORY_USAGE_STATS
|
|
|
504
|
|
|
505 int
|
|
|
506 compute_buffer_marker_usage (struct buffer *b, struct overhead_stats *ovstats)
|
|
|
507 {
|
|
440
|
508 Lisp_Marker *m;
|
|
428
|
509 int total = 0;
|
|
|
510 int overhead;
|
|
|
511
|
|
|
512 for (m = BUF_MARKERS (b); m; m = m->next)
|
|
440
|
513 total += sizeof (Lisp_Marker);
|
|
428
|
514 ovstats->was_requested += total;
|
|
3263
|
515 #ifdef NEW_GC
|
|
2720
|
516 overhead = mc_alloced_storage_size (total, 0);
|
|
3263
|
517 #else /* not NEW_GC */
|
|
428
|
518 overhead = fixed_type_block_overhead (total);
|
|
3263
|
519 #endif /* not NEW_GC */
|
|
428
|
520 /* #### claiming this is all malloc overhead is not really right,
|
|
|
521 but it has to go somewhere. */
|
|
|
522 ovstats->malloc_overhead += overhead;
|
|
|
523 return total + overhead;
|
|
|
524 }
|
|
|
525
|
|
|
526 #endif /* MEMORY_USAGE_STATS */
|
|
|
527
|
|
|
528
|
|
|
529 void
|
|
|
530 syms_of_marker (void)
|
|
|
531 {
|
|
442
|
532 INIT_LRECORD_IMPLEMENTATION (marker);
|
|
|
533
|
|
428
|
534 DEFSUBR (Fmarker_position);
|
|
|
535 DEFSUBR (Fmarker_buffer);
|
|
|
536 DEFSUBR (Fset_marker);
|
|
|
537 DEFSUBR (Fcopy_marker);
|
|
|
538 DEFSUBR (Fmarker_insertion_type);
|
|
|
539 DEFSUBR (Fset_marker_insertion_type);
|
|
|
540 #if 0 /* FSFmacs crock */
|
|
|
541 DEFSUBR (Fbuffer_has_markers_at);
|
|
|
542 #endif
|
|
|
543 }
|
|
|
544
|
|
|
545 void
|
|
|
546 init_buffer_markers (struct buffer *b)
|
|
|
547 {
|
|
793
|
548 Lisp_Object buf = wrap_buffer (b);
|
|
428
|
549
|
|
|
550 b->mark = Fmake_marker ();
|
|
|
551 BUF_MARKERS (b) = 0;
|
|
|
552 b->point_marker = Fmake_marker ();
|
|
|
553 Fset_marker (b->point_marker,
|
|
|
554 /* For indirect buffers, point is already set. */
|
|
|
555 b->base_buffer ? make_int (BUF_PT (b)) : make_int (1),
|
|
|
556 buf);
|
|
|
557 }
|
|
|
558
|
|
|
559 void
|
|
|
560 uninit_buffer_markers (struct buffer *b)
|
|
|
561 {
|
|
|
562 /* Unchain all markers of this buffer
|
|
|
563 and leave them pointing nowhere. */
|
|
440
|
564 REGISTER Lisp_Marker *m, *next;
|
|
428
|
565 for (m = BUF_MARKERS (b); m; m = next)
|
|
|
566 {
|
|
|
567 m->buffer = 0;
|
|
|
568 next = marker_next (m);
|
|
|
569 marker_next (m) = 0;
|
|
|
570 marker_prev (m) = 0;
|
|
|
571 }
|
|
|
572 BUF_MARKERS (b) = 0;
|
|
|
573 }
|
