Mercurial > hg > xemacs-beta
annotate src/marker.c @ 5125:b5df3737028a ben-lisp-object
merge
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Wed, 24 Feb 2010 01:58:04 -0600 |
| parents | 623d57b7fbe8 e813cf16c015 |
| children | a9c41067dd88 |
| rev | line source |
|---|---|
| 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, | |
| 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) | |
| 563 | 63 printing_unreadable_object ("#<marker 0x%lx>", (long) marker); |
| 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"); |
| 800 | 76 write_fmt_string (printcharfun, " 0x%lx>", (long) marker); |
| 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 (void *header) |
| 2720 | 111 { |
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112 Lisp_Object tem = wrap_marker (header); |
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113 unchain_marker (tem); |
| 2720 | 114 } |
| 115 | |
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116 DEFINE_DUMPABLE_FROB_BLOCK_LISP_OBJECT ("marker", marker, |
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117 mark_marker, print_marker, |
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118 finalize_marker, |
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119 marker_equal, marker_hash, |
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120 marker_description, Lisp_Marker); |
| 3263 | 121 #else /* not NEW_GC */ |
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122 DEFINE_DUMPABLE_FROB_BLOCK_LISP_OBJECT ("marker", marker, |
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123 mark_marker, print_marker, 0, |
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124 marker_equal, marker_hash, |
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125 marker_description, Lisp_Marker); |
| 3263 | 126 #endif /* not NEW_GC */ |
| 428 | 127 |
| 128 /* Operations on markers. */ | |
| 129 | |
| 130 DEFUN ("marker-buffer", Fmarker_buffer, 1, 1, 0, /* | |
| 131 Return the buffer that MARKER points into, or nil if none. | |
| 132 Return nil if MARKER points into a dead buffer or doesn't point anywhere. | |
| 133 */ | |
| 134 (marker)) | |
| 135 { | |
| 136 struct buffer *buf; | |
| 137 CHECK_MARKER (marker); | |
| 138 /* Return marker's buffer only if it is not dead. */ | |
| 139 if ((buf = XMARKER (marker)->buffer) && BUFFER_LIVE_P (buf)) | |
| 140 { | |
| 793 | 141 return wrap_buffer (buf); |
| 428 | 142 } |
| 143 return Qnil; | |
| 144 } | |
| 145 | |
| 146 DEFUN ("marker-position", Fmarker_position, 1, 1, 0, /* | |
| 147 Return the position MARKER points at, as a character number. | |
| 148 Return `nil' if marker doesn't point anywhere. | |
| 149 */ | |
| 150 (marker)) | |
| 151 { | |
| 152 CHECK_MARKER (marker); | |
| 153 return XMARKER (marker)->buffer ? make_int (marker_position (marker)) : Qnil; | |
| 154 } | |
| 155 | |
| 156 #if 0 /* useful debugging function */ | |
| 157 | |
| 158 static void | |
| 159 check_marker_circularities (struct buffer *buf) | |
| 160 { | |
| 440 | 161 Lisp_Marker *tortoise, *hare; |
| 428 | 162 |
| 163 tortoise = BUF_MARKERS (buf); | |
| 164 hare = tortoise; | |
| 165 | |
| 166 if (!tortoise) | |
| 167 return; | |
| 168 | |
| 169 while (1) | |
| 170 { | |
| 171 assert (hare->buffer == buf); | |
| 172 hare = hare->next; | |
| 173 if (!hare) | |
| 174 return; | |
| 175 assert (hare->buffer == buf); | |
| 176 hare = hare->next; | |
| 177 if (!hare) | |
| 178 return; | |
| 179 tortoise = tortoise->next; | |
| 180 assert (tortoise != hare); | |
| 181 } | |
| 182 } | |
| 183 | |
| 184 #endif | |
| 185 | |
| 186 static Lisp_Object | |
| 444 | 187 set_marker_internal (Lisp_Object marker, Lisp_Object position, |
| 188 Lisp_Object buffer, int restricted_p) | |
| 428 | 189 { |
| 665 | 190 Charbpos charno; |
| 428 | 191 struct buffer *b; |
| 440 | 192 Lisp_Marker *m; |
| 428 | 193 int point_p; |
| 194 | |
| 195 CHECK_MARKER (marker); | |
| 196 | |
| 197 point_p = POINT_MARKER_P (marker); | |
| 198 | |
| 199 /* If position is nil or a marker that points nowhere, | |
| 200 make this marker point nowhere. */ | |
| 444 | 201 if (NILP (position) || |
| 202 (MARKERP (position) && !XMARKER (position)->buffer)) | |
| 428 | 203 { |
| 204 if (point_p) | |
| 563 | 205 invalid_operation ("Can't make point-marker point nowhere", |
| 206 marker); | |
| 428 | 207 if (XMARKER (marker)->buffer) |
| 208 unchain_marker (marker); | |
| 209 return marker; | |
| 210 } | |
| 211 | |
| 444 | 212 CHECK_INT_COERCE_MARKER (position); |
| 428 | 213 if (NILP (buffer)) |
| 214 b = current_buffer; | |
| 215 else | |
| 216 { | |
| 217 CHECK_BUFFER (buffer); | |
| 218 b = XBUFFER (buffer); | |
| 219 /* If buffer is dead, set marker to point nowhere. */ | |
| 220 if (!BUFFER_LIVE_P (XBUFFER (buffer))) | |
| 221 { | |
| 222 if (point_p) | |
| 563 | 223 invalid_operation |
| 428 | 224 ("Can't move point-marker in a killed buffer", marker); |
| 225 if (XMARKER (marker)->buffer) | |
| 226 unchain_marker (marker); | |
| 227 return marker; | |
| 228 } | |
| 229 } | |
| 230 | |
| 444 | 231 charno = XINT (position); |
| 428 | 232 m = XMARKER (marker); |
| 233 | |
| 234 if (restricted_p) | |
| 235 { | |
| 236 if (charno < BUF_BEGV (b)) charno = BUF_BEGV (b); | |
| 237 if (charno > BUF_ZV (b)) charno = BUF_ZV (b); | |
| 238 } | |
| 239 else | |
| 240 { | |
| 241 if (charno < BUF_BEG (b)) charno = BUF_BEG (b); | |
| 242 if (charno > BUF_Z (b)) charno = BUF_Z (b); | |
| 243 } | |
| 244 | |
| 245 if (point_p) | |
| 246 { | |
| 247 #ifndef moving_point_by_moving_its_marker_is_a_bug | |
| 248 BUF_SET_PT (b, charno); /* this will move the marker */ | |
| 249 #else /* It's not a feature, so it must be a bug */ | |
| 563 | 250 invalid_operation ("DEBUG: attempt to move point via point-marker", |
| 251 marker); | |
| 428 | 252 #endif |
| 253 } | |
| 254 else | |
| 255 { | |
| 665 | 256 m->membpos = charbpos_to_membpos (b, charno); |
| 428 | 257 } |
| 258 | |
| 259 if (m->buffer != b) | |
| 260 { | |
| 261 if (point_p) | |
| 563 | 262 invalid_operation ("Can't change buffer of point-marker", marker); |
| 428 | 263 if (m->buffer != 0) |
| 264 unchain_marker (marker); | |
| 265 m->buffer = b; | |
| 266 marker_next (m) = BUF_MARKERS (b); | |
| 267 marker_prev (m) = 0; | |
| 268 if (BUF_MARKERS (b)) | |
| 269 marker_prev (BUF_MARKERS (b)) = m; | |
| 270 BUF_MARKERS (b) = m; | |
| 271 } | |
| 272 | |
| 273 return marker; | |
| 274 } | |
| 275 | |
| 276 | |
| 277 DEFUN ("set-marker", Fset_marker, 2, 3, 0, /* | |
| 444 | 278 Move MARKER to position POSITION in BUFFER. |
| 279 POSITION can be a marker, an integer or nil. If POSITION is an | |
| 280 integer, make MARKER point before the POSITIONth character in BUFFER. | |
| 281 If POSITION is nil, makes MARKER point nowhere. Then it no longer | |
| 282 slows down editing in any buffer. If POSITION is less than 1, move | |
| 283 MARKER to the beginning of BUFFER. If POSITION is greater than the | |
| 284 size of BUFFER, move MARKER to the end of BUFFER. | |
| 428 | 285 BUFFER defaults to the current buffer. |
| 444 | 286 If this marker was returned by (point-marker t), then changing its |
| 287 position moves point. You cannot change its buffer or make it point | |
| 288 nowhere. | |
| 289 The return value is MARKER. | |
| 428 | 290 */ |
| 444 | 291 (marker, position, buffer)) |
| 428 | 292 { |
| 444 | 293 return set_marker_internal (marker, position, buffer, 0); |
| 428 | 294 } |
| 295 | |
| 296 | |
| 297 /* This version of Fset_marker won't let the position | |
| 298 be outside the visible part. */ | |
| 299 Lisp_Object | |
| 444 | 300 set_marker_restricted (Lisp_Object marker, Lisp_Object position, |
| 301 Lisp_Object buffer) | |
| 428 | 302 { |
| 444 | 303 return set_marker_internal (marker, position, buffer, 1); |
| 428 | 304 } |
| 305 | |
| 306 | |
| 307 /* This is called during garbage collection, | |
| 308 so we must be careful to ignore and preserve mark bits, | |
| 309 including those in chain fields of markers. */ | |
| 310 | |
| 311 void | |
| 312 unchain_marker (Lisp_Object m) | |
| 313 { | |
| 440 | 314 Lisp_Marker *marker = XMARKER (m); |
| 428 | 315 struct buffer *b = marker->buffer; |
| 316 | |
| 317 if (b == 0) | |
| 318 return; | |
| 319 | |
| 800 | 320 #ifdef ERROR_CHECK_STRUCTURES |
| 428 | 321 assert (BUFFER_LIVE_P (b)); |
| 322 #endif | |
| 323 | |
| 324 if (marker_next (marker)) | |
| 325 marker_prev (marker_next (marker)) = marker_prev (marker); | |
| 326 if (marker_prev (marker)) | |
| 327 marker_next (marker_prev (marker)) = marker_next (marker); | |
| 328 else | |
| 329 BUF_MARKERS (b) = marker_next (marker); | |
| 330 | |
| 800 | 331 #ifdef ERROR_CHECK_STRUCTURES |
| 428 | 332 assert (marker != XMARKER (b->point_marker)); |
| 333 #endif | |
| 334 | |
| 335 marker->buffer = 0; | |
| 336 } | |
| 337 | |
| 665 | 338 Bytebpos |
| 826 | 339 byte_marker_position (Lisp_Object marker) |
| 428 | 340 { |
| 440 | 341 Lisp_Marker *m = XMARKER (marker); |
| 428 | 342 struct buffer *buf = m->buffer; |
| 665 | 343 Bytebpos pos; |
| 428 | 344 |
| 345 if (!buf) | |
| 563 | 346 invalid_argument ("Marker does not point anywhere", Qunbound); |
| 428 | 347 |
| 348 /* FSF claims that marker indices could end up denormalized, i.e. | |
| 349 in the gap. This is way bogus if it ever happens, and means | |
| 350 something fucked up elsewhere. Since I've overhauled all this | |
| 351 shit, I don't think this can happen. In any case, the following | |
| 352 macro has an assert() in it that will catch these denormalized | |
| 353 positions. */ | |
| 665 | 354 pos = membpos_to_bytebpos (buf, m->membpos); |
| 428 | 355 |
| 356 return pos; | |
| 357 } | |
| 358 | |
| 665 | 359 Charbpos |
| 428 | 360 marker_position (Lisp_Object marker) |
| 361 { | |
| 362 struct buffer *buf = XMARKER (marker)->buffer; | |
| 363 | |
| 364 if (!buf) | |
| 563 | 365 invalid_argument ("Marker does not point anywhere", Qunbound); |
| 428 | 366 |
| 826 | 367 return bytebpos_to_charbpos (buf, byte_marker_position (marker)); |
| 428 | 368 } |
| 369 | |
| 370 void | |
| 826 | 371 set_byte_marker_position (Lisp_Object marker, Bytebpos pos) |
| 428 | 372 { |
| 440 | 373 Lisp_Marker *m = XMARKER (marker); |
| 428 | 374 struct buffer *buf = m->buffer; |
| 375 | |
| 376 if (!buf) | |
| 563 | 377 invalid_argument ("Marker does not point anywhere", Qunbound); |
| 428 | 378 |
| 665 | 379 m->membpos = bytebpos_to_membpos (buf, pos); |
| 428 | 380 } |
| 381 | |
| 382 void | |
| 665 | 383 set_marker_position (Lisp_Object marker, Charbpos pos) |
| 428 | 384 { |
| 385 struct buffer *buf = XMARKER (marker)->buffer; | |
| 386 | |
| 387 if (!buf) | |
| 563 | 388 invalid_argument ("Marker does not point anywhere", Qunbound); |
| 428 | 389 |
| 826 | 390 set_byte_marker_position (marker, charbpos_to_bytebpos (buf, pos)); |
| 428 | 391 } |
| 392 | |
| 393 static Lisp_Object | |
| 394 copy_marker_1 (Lisp_Object marker, Lisp_Object type, int noseeum) | |
| 395 { | |
| 3025 | 396 REGISTER Lisp_Object new_; |
| 428 | 397 |
| 398 while (1) | |
| 399 { | |
| 400 if (INTP (marker) || MARKERP (marker)) | |
| 401 { | |
| 402 if (noseeum) | |
| 3025 | 403 new_ = noseeum_make_marker (); |
| 428 | 404 else |
| 3025 | 405 new_ = Fmake_marker (); |
| 406 Fset_marker (new_, marker, | |
| 428 | 407 (MARKERP (marker) ? Fmarker_buffer (marker) : Qnil)); |
| 3025 | 408 XMARKER (new_)->insertion_type = !NILP (type); |
| 409 return new_; | |
| 428 | 410 } |
| 411 else | |
| 412 marker = wrong_type_argument (Qinteger_or_marker_p, marker); | |
| 413 } | |
| 414 | |
| 1204 | 415 RETURN_NOT_REACHED (Qnil); /* not reached */ |
| 428 | 416 } |
| 417 | |
| 418 DEFUN ("copy-marker", Fcopy_marker, 1, 2, 0, /* | |
| 444 | 419 Return a new marker pointing at the same place as MARKER-OR-INTEGER. |
| 420 If MARKER-OR-INTEGER is an integer, return a new marker pointing | |
| 428 | 421 at that position in the current buffer. |
| 444 | 422 Optional argument MARKER-TYPE specifies the insertion type of the new |
| 423 marker; see `marker-insertion-type'. | |
| 428 | 424 */ |
| 444 | 425 (marker_or_integer, marker_type)) |
| 428 | 426 { |
| 444 | 427 return copy_marker_1 (marker_or_integer, marker_type, 0); |
| 428 | 428 } |
| 429 | |
| 430 Lisp_Object | |
| 444 | 431 noseeum_copy_marker (Lisp_Object marker, Lisp_Object marker_type) |
| 428 | 432 { |
| 444 | 433 return copy_marker_1 (marker, marker_type, 1); |
| 428 | 434 } |
| 435 | |
| 436 DEFUN ("marker-insertion-type", Fmarker_insertion_type, 1, 1, 0, /* | |
| 437 Return insertion type of MARKER: t if it stays after inserted text. | |
| 438 nil means the marker stays before text inserted there. | |
| 439 */ | |
| 440 (marker)) | |
| 441 { | |
| 442 CHECK_MARKER (marker); | |
| 443 return XMARKER (marker)->insertion_type ? Qt : Qnil; | |
| 444 } | |
| 445 | |
| 446 DEFUN ("set-marker-insertion-type", Fset_marker_insertion_type, 2, 2, 0, /* | |
| 447 Set the insertion-type of MARKER to TYPE. | |
| 448 If TYPE is t, it means the marker advances when you insert text at it. | |
| 449 If TYPE is nil, it means the marker stays behind when you insert text at it. | |
| 450 */ | |
| 451 (marker, type)) | |
| 452 { | |
| 453 CHECK_MARKER (marker); | |
| 454 | |
| 455 XMARKER (marker)->insertion_type = ! NILP (type); | |
| 456 return type; | |
| 457 } | |
| 458 | |
| 459 /* #### What is the possible use of this? It looks quite useless to | |
| 460 me, because there is no way to find *which* markers are positioned | |
| 461 at POSITION. Additional bogosity bonus: (buffer-has-markers-at | |
| 462 (point)) will always return t because of the `point-marker'. The | |
| 463 same goes for the position of mark. Bletch! | |
| 464 | |
| 465 Someone should discuss this with Stallman, but I don't have the | |
| 466 stomach. In fact, this function sucks so badly that I'm disabling | |
| 467 it by default (although I've debugged it). If you want to use it, | |
| 468 use extents instead. --hniksic */ | |
| 469 #if 0 | |
| 826 | 470 DEFUN ("buffer-has-markers-at", Fbuffer_has_markers_at, 1, 1, 0, /* |
| 428 | 471 Return t if there are markers pointing at POSITION in the current buffer. |
| 472 */ | |
| 473 (position)) | |
| 474 { | |
| 440 | 475 Lisp_Marker *marker; |
| 665 | 476 Membpos pos; |
| 428 | 477 |
| 665 | 478 /* A small optimization trick: convert POS to membpos now, rather |
| 479 than converting every marker's memory index to charbpos. */ | |
| 480 pos = bytebpos_to_membpos (current_buffer, | |
| 428 | 481 get_buffer_pos_byte (current_buffer, position, |
| 482 GB_COERCE_RANGE)); | |
| 483 | |
| 484 for (marker = BUF_MARKERS (current_buffer); | |
| 485 marker; | |
| 486 marker = marker_next (marker)) | |
| 487 { | |
| 665 | 488 /* We use marker->membpos, so we don't have to go through the |
| 428 | 489 unwieldy operation of creating a Lisp_Object for |
| 490 marker_position() every time around. */ | |
| 665 | 491 if (marker->membpos == pos) |
| 428 | 492 return Qt; |
| 493 } | |
| 494 | |
| 495 return Qnil; | |
| 496 } | |
| 497 #endif /* 0 */ | |
| 498 | |
| 499 #ifdef MEMORY_USAGE_STATS | |
| 500 | |
| 501 int | |
| 502 compute_buffer_marker_usage (struct buffer *b, struct overhead_stats *ovstats) | |
| 503 { | |
| 440 | 504 Lisp_Marker *m; |
| 428 | 505 int total = 0; |
| 506 int overhead; | |
| 507 | |
| 508 for (m = BUF_MARKERS (b); m; m = m->next) | |
| 440 | 509 total += sizeof (Lisp_Marker); |
| 428 | 510 ovstats->was_requested += total; |
| 3263 | 511 #ifdef NEW_GC |
| 2720 | 512 overhead = mc_alloced_storage_size (total, 0); |
| 3263 | 513 #else /* not NEW_GC */ |
| 428 | 514 overhead = fixed_type_block_overhead (total); |
| 3263 | 515 #endif /* not NEW_GC */ |
| 428 | 516 /* #### claiming this is all malloc overhead is not really right, |
| 517 but it has to go somewhere. */ | |
| 518 ovstats->malloc_overhead += overhead; | |
| 519 return total + overhead; | |
| 520 } | |
| 521 | |
| 522 #endif /* MEMORY_USAGE_STATS */ | |
| 523 | |
| 524 | |
| 525 void | |
| 526 syms_of_marker (void) | |
| 527 { | |
|
5117
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
528 INIT_LISP_OBJECT (marker); |
| 442 | 529 |
| 428 | 530 DEFSUBR (Fmarker_position); |
| 531 DEFSUBR (Fmarker_buffer); | |
| 532 DEFSUBR (Fset_marker); | |
| 533 DEFSUBR (Fcopy_marker); | |
| 534 DEFSUBR (Fmarker_insertion_type); | |
| 535 DEFSUBR (Fset_marker_insertion_type); | |
| 536 #if 0 /* FSFmacs crock */ | |
| 537 DEFSUBR (Fbuffer_has_markers_at); | |
| 538 #endif | |
| 539 } | |
| 540 | |
| 541 void | |
| 542 init_buffer_markers (struct buffer *b) | |
| 543 { | |
| 793 | 544 Lisp_Object buf = wrap_buffer (b); |
| 428 | 545 |
| 546 b->mark = Fmake_marker (); | |
| 547 BUF_MARKERS (b) = 0; | |
| 548 b->point_marker = Fmake_marker (); | |
| 549 Fset_marker (b->point_marker, | |
| 550 /* For indirect buffers, point is already set. */ | |
| 551 b->base_buffer ? make_int (BUF_PT (b)) : make_int (1), | |
| 552 buf); | |
| 553 } | |
| 554 | |
| 555 void | |
| 556 uninit_buffer_markers (struct buffer *b) | |
| 557 { | |
| 558 /* Unchain all markers of this buffer | |
| 559 and leave them pointing nowhere. */ | |
| 440 | 560 REGISTER Lisp_Marker *m, *next; |
| 428 | 561 for (m = BUF_MARKERS (b); m; m = next) |
| 562 { | |
| 563 m->buffer = 0; | |
| 564 next = marker_next (m); | |
| 565 marker_next (m) = 0; | |
| 566 marker_prev (m) = 0; | |
| 567 } | |
| 568 BUF_MARKERS (b) = 0; | |
| 569 } |