Mercurial > hg > xemacs-beta
annotate src/marker.c @ 5159:cb303ff63e76
merge
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Fri, 19 Mar 2010 17:02:11 -0500 |
| parents | 1fae11d56ad2 |
| children | ab9ee10a53e4 |
| rev | line source |
|---|---|
| 428 | 1 /* Markers: examining, setting and killing. |
| 2 Copyright (C) 1985, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. | |
|
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3 Copyright (C) 2002, 2010 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, | |
| 20 Boston, MA 02111-1307, USA. */ | |
| 21 | |
| 22 /* Synched up with: FSF 19.30. */ | |
| 23 | |
| 24 /* This file has been Mule-ized. */ | |
| 25 | |
| 26 /* Note that markers are currently kept in an unordered list. | |
| 27 This means that marker operations may be inefficient if | |
| 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 | |
| 31 to an ordered gap array. (Just copy the code from extents.c.) | |
| 32 */ | |
| 33 | |
| 34 #include <config.h> | |
| 35 #include "lisp.h" | |
| 36 | |
| 37 #include "buffer.h" | |
| 38 | |
| 39 static Lisp_Object | |
| 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. | |
| 45 The buffer's markers chain does not preserve markers from gc; | |
| 46 Instead, markers are removed from the chain when they are freed | |
| 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) | |
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63 printing_unreadable_object_fmt ("#<marker 0x%x>", LISP_OBJECT_UID (obj)); |
| 428 | 64 |
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65 write_ascstring (printcharfun, GETTEXT ("#<marker ")); |
| 428 | 66 if (!marker->buffer) |
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67 write_ascstring (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) |
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75 write_ascstring (printcharfun, " insertion-type=t"); |
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76 write_fmt_string (printcharfun, " 0x%x>", LISP_OBJECT_UID (obj)); |
| 428 | 77 } |
| 78 | |
| 79 static int | |
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80 marker_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
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81 int UNUSED (foldcase)) |
| 428 | 82 { |
| 440 | 83 Lisp_Marker *marker1 = XMARKER (obj1); |
| 84 Lisp_Marker *marker2 = XMARKER (obj2); | |
| 428 | 85 |
| 86 return ((marker1->buffer == marker2->buffer) && | |
| 665 | 87 (marker1->membpos == marker2->membpos || |
| 428 | 88 /* All markers pointing nowhere are equal */ |
| 89 !marker1->buffer)); | |
| 90 } | |
| 91 | |
| 2515 | 92 static Hashcode |
| 2286 | 93 marker_hash (Lisp_Object obj, int UNUSED (depth)) |
| 428 | 94 { |
| 2515 | 95 Hashcode hash = (Hashcode) XMARKER (obj)->buffer; |
| 428 | 96 if (hash) |
| 665 | 97 hash = HASH2 (hash, XMARKER (obj)->membpos); |
| 428 | 98 return hash; |
| 99 } | |
| 100 | |
| 1204 | 101 static const struct memory_description marker_description[] = { |
| 2551 | 102 { XD_LISP_OBJECT, offsetof (Lisp_Marker, next), 0, { 0 }, XD_FLAG_NO_KKCC }, |
| 103 { XD_LISP_OBJECT, offsetof (Lisp_Marker, prev), 0, { 0 }, XD_FLAG_NO_KKCC }, | |
| 440 | 104 { XD_LISP_OBJECT, offsetof (Lisp_Marker, buffer) }, |
| 428 | 105 { XD_END } |
| 106 }; | |
| 107 | |
| 3263 | 108 #ifdef NEW_GC |
| 2720 | 109 static void |
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110 finalize_marker (Lisp_Object obj) |
| 2720 | 111 { |
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112 unchain_marker (obj); |
| 2720 | 113 } |
| 114 | |
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115 DEFINE_DUMPABLE_FROB_BLOCK_LISP_OBJECT ("marker", marker, |
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116 mark_marker, print_marker, |
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117 finalize_marker, |
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118 marker_equal, marker_hash, |
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119 marker_description, Lisp_Marker); |
| 3263 | 120 #else /* not NEW_GC */ |
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121 DEFINE_DUMPABLE_FROB_BLOCK_LISP_OBJECT ("marker", marker, |
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122 mark_marker, print_marker, 0, |
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123 marker_equal, marker_hash, |
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124 marker_description, Lisp_Marker); |
| 3263 | 125 #endif /* not NEW_GC */ |
| 428 | 126 |
| 127 /* Operations on markers. */ | |
| 128 | |
| 129 DEFUN ("marker-buffer", Fmarker_buffer, 1, 1, 0, /* | |
| 130 Return the buffer that MARKER points into, or nil if none. | |
| 131 Return nil if MARKER points into a dead buffer or doesn't point anywhere. | |
| 132 */ | |
| 133 (marker)) | |
| 134 { | |
| 135 struct buffer *buf; | |
| 136 CHECK_MARKER (marker); | |
| 137 /* Return marker's buffer only if it is not dead. */ | |
| 138 if ((buf = XMARKER (marker)->buffer) && BUFFER_LIVE_P (buf)) | |
| 139 { | |
| 793 | 140 return wrap_buffer (buf); |
| 428 | 141 } |
| 142 return Qnil; | |
| 143 } | |
| 144 | |
| 145 DEFUN ("marker-position", Fmarker_position, 1, 1, 0, /* | |
| 146 Return the position MARKER points at, as a character number. | |
| 147 Return `nil' if marker doesn't point anywhere. | |
| 148 */ | |
| 149 (marker)) | |
| 150 { | |
| 151 CHECK_MARKER (marker); | |
| 152 return XMARKER (marker)->buffer ? make_int (marker_position (marker)) : Qnil; | |
| 153 } | |
| 154 | |
| 155 #if 0 /* useful debugging function */ | |
| 156 | |
| 157 static void | |
| 158 check_marker_circularities (struct buffer *buf) | |
| 159 { | |
| 440 | 160 Lisp_Marker *tortoise, *hare; |
| 428 | 161 |
| 162 tortoise = BUF_MARKERS (buf); | |
| 163 hare = tortoise; | |
| 164 | |
| 165 if (!tortoise) | |
| 166 return; | |
| 167 | |
| 168 while (1) | |
| 169 { | |
| 170 assert (hare->buffer == buf); | |
| 171 hare = hare->next; | |
| 172 if (!hare) | |
| 173 return; | |
| 174 assert (hare->buffer == buf); | |
| 175 hare = hare->next; | |
| 176 if (!hare) | |
| 177 return; | |
| 178 tortoise = tortoise->next; | |
| 179 assert (tortoise != hare); | |
| 180 } | |
| 181 } | |
| 182 | |
| 183 #endif | |
| 184 | |
| 185 static Lisp_Object | |
| 444 | 186 set_marker_internal (Lisp_Object marker, Lisp_Object position, |
| 187 Lisp_Object buffer, int restricted_p) | |
| 428 | 188 { |
| 665 | 189 Charbpos charno; |
| 428 | 190 struct buffer *b; |
| 440 | 191 Lisp_Marker *m; |
| 428 | 192 int point_p; |
| 193 | |
| 194 CHECK_MARKER (marker); | |
| 195 | |
| 196 point_p = POINT_MARKER_P (marker); | |
| 197 | |
| 198 /* If position is nil or a marker that points nowhere, | |
| 199 make this marker point nowhere. */ | |
| 444 | 200 if (NILP (position) || |
| 201 (MARKERP (position) && !XMARKER (position)->buffer)) | |
| 428 | 202 { |
| 203 if (point_p) | |
| 563 | 204 invalid_operation ("Can't make point-marker point nowhere", |
| 205 marker); | |
| 428 | 206 if (XMARKER (marker)->buffer) |
| 207 unchain_marker (marker); | |
| 208 return marker; | |
| 209 } | |
| 210 | |
| 444 | 211 CHECK_INT_COERCE_MARKER (position); |
| 428 | 212 if (NILP (buffer)) |
| 213 b = current_buffer; | |
| 214 else | |
| 215 { | |
| 216 CHECK_BUFFER (buffer); | |
| 217 b = XBUFFER (buffer); | |
| 218 /* If buffer is dead, set marker to point nowhere. */ | |
| 219 if (!BUFFER_LIVE_P (XBUFFER (buffer))) | |
| 220 { | |
| 221 if (point_p) | |
| 563 | 222 invalid_operation |
| 428 | 223 ("Can't move point-marker in a killed buffer", marker); |
| 224 if (XMARKER (marker)->buffer) | |
| 225 unchain_marker (marker); | |
| 226 return marker; | |
| 227 } | |
| 228 } | |
| 229 | |
| 444 | 230 charno = XINT (position); |
| 428 | 231 m = XMARKER (marker); |
| 232 | |
| 233 if (restricted_p) | |
| 234 { | |
| 235 if (charno < BUF_BEGV (b)) charno = BUF_BEGV (b); | |
| 236 if (charno > BUF_ZV (b)) charno = BUF_ZV (b); | |
| 237 } | |
| 238 else | |
| 239 { | |
| 240 if (charno < BUF_BEG (b)) charno = BUF_BEG (b); | |
| 241 if (charno > BUF_Z (b)) charno = BUF_Z (b); | |
| 242 } | |
| 243 | |
| 244 if (point_p) | |
| 245 { | |
| 246 #ifndef moving_point_by_moving_its_marker_is_a_bug | |
| 247 BUF_SET_PT (b, charno); /* this will move the marker */ | |
| 248 #else /* It's not a feature, so it must be a bug */ | |
| 563 | 249 invalid_operation ("DEBUG: attempt to move point via point-marker", |
| 250 marker); | |
| 428 | 251 #endif |
| 252 } | |
| 253 else | |
| 254 { | |
| 665 | 255 m->membpos = charbpos_to_membpos (b, charno); |
| 428 | 256 } |
| 257 | |
| 258 if (m->buffer != b) | |
| 259 { | |
| 260 if (point_p) | |
| 563 | 261 invalid_operation ("Can't change buffer of point-marker", marker); |
| 428 | 262 if (m->buffer != 0) |
| 263 unchain_marker (marker); | |
| 264 m->buffer = b; | |
| 265 marker_next (m) = BUF_MARKERS (b); | |
| 266 marker_prev (m) = 0; | |
| 267 if (BUF_MARKERS (b)) | |
| 268 marker_prev (BUF_MARKERS (b)) = m; | |
| 269 BUF_MARKERS (b) = m; | |
| 270 } | |
| 271 | |
| 272 return marker; | |
| 273 } | |
| 274 | |
| 275 | |
| 276 DEFUN ("set-marker", Fset_marker, 2, 3, 0, /* | |
| 444 | 277 Move MARKER to position POSITION in BUFFER. |
| 278 POSITION can be a marker, an integer or nil. If POSITION is an | |
| 279 integer, make MARKER point before the POSITIONth character in BUFFER. | |
| 280 If POSITION is nil, makes MARKER point nowhere. Then it no longer | |
| 281 slows down editing in any buffer. If POSITION is less than 1, move | |
| 282 MARKER to the beginning of BUFFER. If POSITION is greater than the | |
| 283 size of BUFFER, move MARKER to the end of BUFFER. | |
| 428 | 284 BUFFER defaults to the current buffer. |
| 444 | 285 If this marker was returned by (point-marker t), then changing its |
| 286 position moves point. You cannot change its buffer or make it point | |
| 287 nowhere. | |
| 288 The return value is MARKER. | |
| 428 | 289 */ |
| 444 | 290 (marker, position, buffer)) |
| 428 | 291 { |
| 444 | 292 return set_marker_internal (marker, position, buffer, 0); |
| 428 | 293 } |
| 294 | |
| 295 | |
| 296 /* This version of Fset_marker won't let the position | |
| 297 be outside the visible part. */ | |
| 298 Lisp_Object | |
| 444 | 299 set_marker_restricted (Lisp_Object marker, Lisp_Object position, |
| 300 Lisp_Object buffer) | |
| 428 | 301 { |
| 444 | 302 return set_marker_internal (marker, position, buffer, 1); |
| 428 | 303 } |
| 304 | |
| 305 | |
| 306 /* This is called during garbage collection, | |
| 307 so we must be careful to ignore and preserve mark bits, | |
| 308 including those in chain fields of markers. */ | |
| 309 | |
| 310 void | |
| 311 unchain_marker (Lisp_Object m) | |
| 312 { | |
| 440 | 313 Lisp_Marker *marker = XMARKER (m); |
| 428 | 314 struct buffer *b = marker->buffer; |
| 315 | |
| 316 if (b == 0) | |
| 317 return; | |
| 318 | |
| 800 | 319 #ifdef ERROR_CHECK_STRUCTURES |
| 428 | 320 assert (BUFFER_LIVE_P (b)); |
| 321 #endif | |
| 322 | |
| 323 if (marker_next (marker)) | |
| 324 marker_prev (marker_next (marker)) = marker_prev (marker); | |
| 325 if (marker_prev (marker)) | |
| 326 marker_next (marker_prev (marker)) = marker_next (marker); | |
| 327 else | |
| 328 BUF_MARKERS (b) = marker_next (marker); | |
| 329 | |
| 800 | 330 #ifdef ERROR_CHECK_STRUCTURES |
| 428 | 331 assert (marker != XMARKER (b->point_marker)); |
| 332 #endif | |
| 333 | |
| 334 marker->buffer = 0; | |
| 335 } | |
| 336 | |
| 665 | 337 Bytebpos |
| 826 | 338 byte_marker_position (Lisp_Object marker) |
| 428 | 339 { |
| 440 | 340 Lisp_Marker *m = XMARKER (marker); |
| 428 | 341 struct buffer *buf = m->buffer; |
| 665 | 342 Bytebpos pos; |
| 428 | 343 |
| 344 if (!buf) | |
| 563 | 345 invalid_argument ("Marker does not point anywhere", Qunbound); |
| 428 | 346 |
| 347 /* FSF claims that marker indices could end up denormalized, i.e. | |
| 348 in the gap. This is way bogus if it ever happens, and means | |
| 349 something fucked up elsewhere. Since I've overhauled all this | |
| 350 shit, I don't think this can happen. In any case, the following | |
| 351 macro has an assert() in it that will catch these denormalized | |
| 352 positions. */ | |
| 665 | 353 pos = membpos_to_bytebpos (buf, m->membpos); |
| 428 | 354 |
| 355 return pos; | |
| 356 } | |
| 357 | |
| 665 | 358 Charbpos |
| 428 | 359 marker_position (Lisp_Object marker) |
| 360 { | |
| 361 struct buffer *buf = XMARKER (marker)->buffer; | |
| 362 | |
| 363 if (!buf) | |
| 563 | 364 invalid_argument ("Marker does not point anywhere", Qunbound); |
| 428 | 365 |
| 826 | 366 return bytebpos_to_charbpos (buf, byte_marker_position (marker)); |
| 428 | 367 } |
| 368 | |
| 369 void | |
| 826 | 370 set_byte_marker_position (Lisp_Object marker, Bytebpos pos) |
| 428 | 371 { |
| 440 | 372 Lisp_Marker *m = XMARKER (marker); |
| 428 | 373 struct buffer *buf = m->buffer; |
| 374 | |
| 375 if (!buf) | |
| 563 | 376 invalid_argument ("Marker does not point anywhere", Qunbound); |
| 428 | 377 |
| 665 | 378 m->membpos = bytebpos_to_membpos (buf, pos); |
| 428 | 379 } |
| 380 | |
| 381 void | |
| 665 | 382 set_marker_position (Lisp_Object marker, Charbpos pos) |
| 428 | 383 { |
| 384 struct buffer *buf = XMARKER (marker)->buffer; | |
| 385 | |
| 386 if (!buf) | |
| 563 | 387 invalid_argument ("Marker does not point anywhere", Qunbound); |
| 428 | 388 |
| 826 | 389 set_byte_marker_position (marker, charbpos_to_bytebpos (buf, pos)); |
| 428 | 390 } |
| 391 | |
| 392 static Lisp_Object | |
| 393 copy_marker_1 (Lisp_Object marker, Lisp_Object type, int noseeum) | |
| 394 { | |
| 3025 | 395 REGISTER Lisp_Object new_; |
| 428 | 396 |
| 397 while (1) | |
| 398 { | |
| 399 if (INTP (marker) || MARKERP (marker)) | |
| 400 { | |
| 401 if (noseeum) | |
| 3025 | 402 new_ = noseeum_make_marker (); |
| 428 | 403 else |
| 3025 | 404 new_ = Fmake_marker (); |
| 405 Fset_marker (new_, marker, | |
| 428 | 406 (MARKERP (marker) ? Fmarker_buffer (marker) : Qnil)); |
| 3025 | 407 XMARKER (new_)->insertion_type = !NILP (type); |
| 408 return new_; | |
| 428 | 409 } |
| 410 else | |
| 411 marker = wrong_type_argument (Qinteger_or_marker_p, marker); | |
| 412 } | |
| 413 | |
| 1204 | 414 RETURN_NOT_REACHED (Qnil); /* not reached */ |
| 428 | 415 } |
| 416 | |
| 417 DEFUN ("copy-marker", Fcopy_marker, 1, 2, 0, /* | |
| 444 | 418 Return a new marker pointing at the same place as MARKER-OR-INTEGER. |
| 419 If MARKER-OR-INTEGER is an integer, return a new marker pointing | |
| 428 | 420 at that position in the current buffer. |
| 444 | 421 Optional argument MARKER-TYPE specifies the insertion type of the new |
| 422 marker; see `marker-insertion-type'. | |
| 428 | 423 */ |
| 444 | 424 (marker_or_integer, marker_type)) |
| 428 | 425 { |
| 444 | 426 return copy_marker_1 (marker_or_integer, marker_type, 0); |
| 428 | 427 } |
| 428 | |
| 429 Lisp_Object | |
| 444 | 430 noseeum_copy_marker (Lisp_Object marker, Lisp_Object marker_type) |
| 428 | 431 { |
| 444 | 432 return copy_marker_1 (marker, marker_type, 1); |
| 428 | 433 } |
| 434 | |
| 435 DEFUN ("marker-insertion-type", Fmarker_insertion_type, 1, 1, 0, /* | |
| 436 Return insertion type of MARKER: t if it stays after inserted text. | |
| 437 nil means the marker stays before text inserted there. | |
| 438 */ | |
| 439 (marker)) | |
| 440 { | |
| 441 CHECK_MARKER (marker); | |
| 442 return XMARKER (marker)->insertion_type ? Qt : Qnil; | |
| 443 } | |
| 444 | |
| 445 DEFUN ("set-marker-insertion-type", Fset_marker_insertion_type, 2, 2, 0, /* | |
| 446 Set the insertion-type of MARKER to TYPE. | |
| 447 If TYPE is t, it means the marker advances when you insert text at it. | |
| 448 If TYPE is nil, it means the marker stays behind when you insert text at it. | |
| 449 */ | |
| 450 (marker, type)) | |
| 451 { | |
| 452 CHECK_MARKER (marker); | |
| 453 | |
| 454 XMARKER (marker)->insertion_type = ! NILP (type); | |
| 455 return type; | |
| 456 } | |
| 457 | |
| 458 /* #### What is the possible use of this? It looks quite useless to | |
| 459 me, because there is no way to find *which* markers are positioned | |
| 460 at POSITION. Additional bogosity bonus: (buffer-has-markers-at | |
| 461 (point)) will always return t because of the `point-marker'. The | |
| 462 same goes for the position of mark. Bletch! | |
| 463 | |
| 464 Someone should discuss this with Stallman, but I don't have the | |
| 465 stomach. In fact, this function sucks so badly that I'm disabling | |
| 466 it by default (although I've debugged it). If you want to use it, | |
| 467 use extents instead. --hniksic */ | |
| 468 #if 0 | |
| 826 | 469 DEFUN ("buffer-has-markers-at", Fbuffer_has_markers_at, 1, 1, 0, /* |
| 428 | 470 Return t if there are markers pointing at POSITION in the current buffer. |
| 471 */ | |
| 472 (position)) | |
| 473 { | |
| 440 | 474 Lisp_Marker *marker; |
| 665 | 475 Membpos pos; |
| 428 | 476 |
| 665 | 477 /* A small optimization trick: convert POS to membpos now, rather |
| 478 than converting every marker's memory index to charbpos. */ | |
| 479 pos = bytebpos_to_membpos (current_buffer, | |
| 428 | 480 get_buffer_pos_byte (current_buffer, position, |
| 481 GB_COERCE_RANGE)); | |
| 482 | |
| 483 for (marker = BUF_MARKERS (current_buffer); | |
| 484 marker; | |
| 485 marker = marker_next (marker)) | |
| 486 { | |
| 665 | 487 /* We use marker->membpos, so we don't have to go through the |
| 428 | 488 unwieldy operation of creating a Lisp_Object for |
| 489 marker_position() every time around. */ | |
| 665 | 490 if (marker->membpos == pos) |
| 428 | 491 return Qt; |
| 492 } | |
| 493 | |
| 494 return Qnil; | |
| 495 } | |
| 496 #endif /* 0 */ | |
| 497 | |
| 498 #ifdef MEMORY_USAGE_STATS | |
| 499 | |
| 500 int | |
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501 compute_buffer_marker_usage (struct buffer *b, struct usage_stats *ustats) |
| 428 | 502 { |
| 440 | 503 Lisp_Marker *m; |
| 428 | 504 int total = 0; |
| 505 int overhead; | |
| 506 | |
| 507 for (m = BUF_MARKERS (b); m; m = m->next) | |
| 440 | 508 total += sizeof (Lisp_Marker); |
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509 ustats->was_requested += total; |
| 3263 | 510 #ifdef NEW_GC |
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511 overhead = mc_alloced_storage_size (total, 0) - total; |
| 3263 | 512 #else /* not NEW_GC */ |
| 428 | 513 overhead = fixed_type_block_overhead (total); |
| 3263 | 514 #endif /* not NEW_GC */ |
| 428 | 515 /* #### claiming this is all malloc overhead is not really right, |
| 516 but it has to go somewhere. */ | |
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517 ustats->malloc_overhead += overhead; |
| 428 | 518 return total + overhead; |
| 519 } | |
| 520 | |
| 521 #endif /* MEMORY_USAGE_STATS */ | |
| 522 | |
| 523 | |
| 524 void | |
| 525 syms_of_marker (void) | |
| 526 { | |
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527 INIT_LISP_OBJECT (marker); |
| 442 | 528 |
| 428 | 529 DEFSUBR (Fmarker_position); |
| 530 DEFSUBR (Fmarker_buffer); | |
| 531 DEFSUBR (Fset_marker); | |
| 532 DEFSUBR (Fcopy_marker); | |
| 533 DEFSUBR (Fmarker_insertion_type); | |
| 534 DEFSUBR (Fset_marker_insertion_type); | |
| 535 #if 0 /* FSFmacs crock */ | |
| 536 DEFSUBR (Fbuffer_has_markers_at); | |
| 537 #endif | |
| 538 } | |
| 539 | |
| 540 void | |
| 541 init_buffer_markers (struct buffer *b) | |
| 542 { | |
| 793 | 543 Lisp_Object buf = wrap_buffer (b); |
| 428 | 544 |
| 545 b->mark = Fmake_marker (); | |
| 546 BUF_MARKERS (b) = 0; | |
| 547 b->point_marker = Fmake_marker (); | |
| 548 Fset_marker (b->point_marker, | |
| 549 /* For indirect buffers, point is already set. */ | |
| 550 b->base_buffer ? make_int (BUF_PT (b)) : make_int (1), | |
| 551 buf); | |
| 552 } | |
| 553 | |
| 554 void | |
| 555 uninit_buffer_markers (struct buffer *b) | |
| 556 { | |
| 557 /* Unchain all markers of this buffer | |
| 558 and leave them pointing nowhere. */ | |
| 440 | 559 REGISTER Lisp_Marker *m, *next; |
| 428 | 560 for (m = BUF_MARKERS (b); m; m = next) |
| 561 { | |
| 562 m->buffer = 0; | |
| 563 next = marker_next (m); | |
| 564 marker_next (m) = 0; | |
| 565 marker_prev (m) = 0; | |
| 566 } | |
| 567 BUF_MARKERS (b) = 0; | |
| 568 } |