buffer.c 139 KB
Newer Older
Roland McGrath's avatar
Roland McGrath committed
1
/* Buffer manipulation primitives for GNU Emacs.
Richard M. Stallman's avatar
Richard M. Stallman committed
2
   Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, 1995, 1997
3
	Free Software Foundation, Inc.
Roland McGrath's avatar
Roland McGrath committed
4 5 6 7 8

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
9
the Free Software Foundation; either version 2, or (at your option)
Roland McGrath's avatar
Roland McGrath committed
10 11 12 13 14 15 16 17 18
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
19 20
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */
Roland McGrath's avatar
Roland McGrath committed
21 22


23 24
#include <sys/types.h>
#include <sys/stat.h>
Roland McGrath's avatar
Roland McGrath committed
25
#include <sys/param.h>
Richard M. Stallman's avatar
Richard M. Stallman committed
26 27 28
#include <errno.h>

extern int errno;
Roland McGrath's avatar
Roland McGrath committed
29 30 31 32 33 34

#ifndef MAXPATHLEN
/* in 4.1, param.h fails to define this. */
#define MAXPATHLEN 1024
#endif /* not MAXPATHLEN */

35
#include <config.h>
Roland McGrath's avatar
Roland McGrath committed
36
#include "lisp.h"
37
#include "intervals.h"
Roland McGrath's avatar
Roland McGrath committed
38 39 40
#include "window.h"
#include "commands.h"
#include "buffer.h"
Karl Heuer's avatar
Karl Heuer committed
41
#include "charset.h"
42
#include "region-cache.h"
Roland McGrath's avatar
Roland McGrath committed
43
#include "indent.h"
Richard M. Stallman's avatar
Richard M. Stallman committed
44
#include "blockinput.h"
45
#include "frame.h"
Roland McGrath's avatar
Roland McGrath committed
46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98

struct buffer *current_buffer;		/* the current buffer */

/* First buffer in chain of all buffers (in reverse order of creation).
   Threaded through ->next.  */

struct buffer *all_buffers;

/* This structure holds the default values of the buffer-local variables
   defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
   The default value occupies the same slot in this structure
   as an individual buffer's value occupies in that buffer.
   Setting the default value also goes through the alist of buffers
   and stores into each buffer that does not say it has a local value.  */

struct buffer buffer_defaults;

/* A Lisp_Object pointer to the above, used for staticpro */

static Lisp_Object Vbuffer_defaults;

/* This structure marks which slots in a buffer have corresponding
   default values in buffer_defaults.
   Each such slot has a nonzero value in this structure.
   The value has only one nonzero bit.

   When a buffer has its own local value for a slot,
   the bit for that slot (found in the same slot in this structure)
   is turned on in the buffer's local_var_flags slot.

   If a slot in this structure is -1, then even though there may
   be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
   and the corresponding slot in buffer_defaults is not used.

   If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
   but there is a default value which is copied into each buffer.

   If a slot in this structure is negative, then even though there may
   be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
   and the corresponding slot in buffer_defaults is not used.

   If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
   zero, that is a bug */

struct buffer buffer_local_flags;

/* This structure holds the names of symbols whose values may be
   buffer-local.  It is indexed and accessed in the same way as the above. */

struct buffer buffer_local_symbols;
/* A Lisp_Object pointer to the above, used for staticpro */
static Lisp_Object Vbuffer_local_symbols;

99 100 101 102 103 104 105 106
/* This structure holds the required types for the values in the
   buffer-local slots.  If a slot contains Qnil, then the
   corresponding buffer slot may contain a value of any type.  If a
   slot contains an integer, then prospective values' tags must be
   equal to that integer.  When a tag does not match, the function
   buffer_slot_type_mismatch will signal an error.  */
struct buffer buffer_local_types;

107 108 109 110
/* Flags indicating which built-in buffer-local variables
   are permanent locals.  */
static int buffer_permanent_local_flags;

Roland McGrath's avatar
Roland McGrath committed
111
Lisp_Object Fset_buffer ();
Roland McGrath's avatar
Roland McGrath committed
112
void set_buffer_internal ();
113
void set_buffer_internal_1 ();
114
static void call_overlay_mod_hooks ();
115
static void swap_out_buffer_local_variables ();
116
static void reset_buffer_local_variables ();
Roland McGrath's avatar
Roland McGrath committed
117 118 119 120 121 122 123 124 125

/* Alist of all buffer names vs the buffers. */
/* This used to be a variable, but is no longer,
 to prevent lossage due to user rplac'ing this alist or its elements.  */
Lisp_Object Vbuffer_alist;

/* Functions to call before and after each text change. */
Lisp_Object Vbefore_change_function;
Lisp_Object Vafter_change_function;
126 127
Lisp_Object Vbefore_change_functions;
Lisp_Object Vafter_change_functions;
Roland McGrath's avatar
Roland McGrath committed
128

129 130
Lisp_Object Vtransient_mark_mode;

131 132 133 134 135
/* t means ignore all read-only text properties.
   A list means ignore such a property if its value is a member of the list.
   Any non-nil value means ignore buffer-read-only.  */
Lisp_Object Vinhibit_read_only;

136 137 138 139
/* List of functions to call that can query about killing a buffer.
   If any of these functions returns nil, we don't kill it.  */
Lisp_Object Vkill_buffer_query_functions;

Jim Blandy's avatar
Jim Blandy committed
140 141
/* List of functions to call before changing an unmodified buffer.  */
Lisp_Object Vfirst_change_hook;
142

Jim Blandy's avatar
Jim Blandy committed
143
Lisp_Object Qfirst_change_hook;
144 145
Lisp_Object Qbefore_change_functions;
Lisp_Object Qafter_change_functions;
Roland McGrath's avatar
Roland McGrath committed
146 147 148 149 150 151 152 153 154

Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local;

Lisp_Object Qprotected_field;

Lisp_Object QSFundamental;	/* A string "Fundamental" */

Lisp_Object Qkill_buffer_hook;

Richard M. Stallman's avatar
Richard M. Stallman committed
155 156
Lisp_Object Qget_file_buffer;

Jim Blandy's avatar
Jim Blandy committed
157 158
Lisp_Object Qoverlayp;

159
Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string;
160

161 162 163 164
Lisp_Object Qmodification_hooks;
Lisp_Object Qinsert_in_front_hooks;
Lisp_Object Qinsert_behind_hooks;

Roland McGrath's avatar
Roland McGrath committed
165 166 167
/* For debugging; temporary.  See set_buffer_internal.  */
/* Lisp_Object Qlisp_mode, Vcheck_symbol; */

168
void
Roland McGrath's avatar
Roland McGrath committed
169 170 171
nsberror (spec)
     Lisp_Object spec;
{
172
  if (STRINGP (spec))
Roland McGrath's avatar
Roland McGrath committed
173 174 175 176
    error ("No buffer named %s", XSTRING (spec)->data);
  error ("Invalid buffer argument");
}

177 178 179 180 181 182 183 184 185 186
DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0,
  "Return non-nil if OBJECT is a buffer which has not been killed.\n\
Value is nil if OBJECT is not a buffer or if it has been killed.")
  (object)
     Lisp_Object object;
{
  return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name))
	  ? Qt : Qnil);
}

187 188 189 190 191
DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0,
  "Return a list of all existing live buffers.\n\
If the optional arg FRAME is a frame, we return that frame's buffer list.")
  (frame)
     Lisp_Object frame;
Roland McGrath's avatar
Roland McGrath committed
192
{
193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214
  Lisp_Object framelist, general;
  general = Fmapcar (Qcdr, Vbuffer_alist);

  if (FRAMEP (frame))
    {
      Lisp_Object tail;

      CHECK_FRAME (frame, 1);

      framelist = Fcopy_sequence (XFRAME (frame)->buffer_list);

      /* Remove from GENERAL any buffer that duplicates one in FRAMELIST.  */
      tail = framelist;
      while (! NILP (tail))
	{
	  general = Fdelq (XCONS (tail)->car, general);
	  tail = XCONS (tail)->cdr;
	}
      return nconc2 (framelist, general);
    }

  return general;
Roland McGrath's avatar
Roland McGrath committed
215 216
}

217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237
/* Like Fassoc, but use Fstring_equal to compare
   (which ignores text properties),
   and don't ever QUIT.  */

static Lisp_Object
assoc_ignore_text_properties (key, list)
     register Lisp_Object key;
     Lisp_Object list;
{
  register Lisp_Object tail;
  for (tail = list; !NILP (tail); tail = Fcdr (tail))
    {
      register Lisp_Object elt, tem;
      elt = Fcar (tail);
      tem = Fstring_equal (Fcar (elt), key);
      if (!NILP (tem))
	return elt;
    }
  return Qnil;
}

Roland McGrath's avatar
Roland McGrath committed
238 239 240 241 242 243 244
DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0,
  "Return the buffer named NAME (a string).\n\
If there is no live buffer named NAME, return nil.\n\
NAME may also be a buffer; if so, the value is that buffer.")
  (name)
     register Lisp_Object name;
{
245
  if (BUFFERP (name))
Roland McGrath's avatar
Roland McGrath committed
246 247 248
    return name;
  CHECK_STRING (name, 0);

249
  return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist));
Roland McGrath's avatar
Roland McGrath committed
250 251 252 253
}

DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0,
  "Return the buffer visiting file FILENAME (a string).\n\
Karl Heuer's avatar
Karl Heuer committed
254
The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
255 256
If there is no such live buffer, return nil.\n\
See also `find-buffer-visiting'.")
Roland McGrath's avatar
Roland McGrath committed
257 258 259 260
  (filename)
     register Lisp_Object filename;
{
  register Lisp_Object tail, buf, tem;
Richard M. Stallman's avatar
Richard M. Stallman committed
261 262
  Lisp_Object handler;

Roland McGrath's avatar
Roland McGrath committed
263 264 265
  CHECK_STRING (filename, 0);
  filename = Fexpand_file_name (filename, Qnil);

Richard M. Stallman's avatar
Richard M. Stallman committed
266 267
  /* If the file name has special constructs in it,
     call the corresponding file handler.  */
268
  handler = Ffind_file_name_handler (filename, Qget_file_buffer);
Richard M. Stallman's avatar
Richard M. Stallman committed
269 270 271
  if (!NILP (handler))
    return call2 (handler, Qget_file_buffer, filename);

Roland McGrath's avatar
Roland McGrath committed
272 273 274
  for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr)
    {
      buf = Fcdr (XCONS (tail)->car);
275 276
      if (!BUFFERP (buf)) continue;
      if (!STRINGP (XBUFFER (buf)->filename)) continue;
Roland McGrath's avatar
Roland McGrath committed
277
      tem = Fstring_equal (XBUFFER (buf)->filename, filename);
Jim Blandy's avatar
Jim Blandy committed
278
      if (!NILP (tem))
Roland McGrath's avatar
Roland McGrath committed
279 280 281 282 283
	return buf;
    }
  return Qnil;
}

284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301
Lisp_Object
get_truename_buffer (filename)
     register Lisp_Object filename;
{
  register Lisp_Object tail, buf, tem;

  for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr)
    {
      buf = Fcdr (XCONS (tail)->car);
      if (!BUFFERP (buf)) continue;
      if (!STRINGP (XBUFFER (buf)->file_truename)) continue;
      tem = Fstring_equal (XBUFFER (buf)->file_truename, filename);
      if (!NILP (tem))
	return buf;
    }
  return Qnil;
}

Roland McGrath's avatar
Roland McGrath committed
302 303 304 305 306 307
/* Incremented for each buffer created, to assign the buffer number. */
int buffer_count;

DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0,
  "Return the buffer named NAME, or create such a buffer and return it.\n\
A new buffer is created if there is no live buffer named NAME.\n\
308
If NAME starts with a space, the new buffer does not keep undo information.\n\
Roland McGrath's avatar
Roland McGrath committed
309 310 311 312 313
If NAME is a buffer instead of a string, then it is the value returned.\n\
The value is never nil.")  
  (name)
     register Lisp_Object name;
{
314
  register Lisp_Object buf;
Roland McGrath's avatar
Roland McGrath committed
315 316 317
  register struct buffer *b;

  buf = Fget_buffer (name);
Jim Blandy's avatar
Jim Blandy committed
318
  if (!NILP (buf))
Roland McGrath's avatar
Roland McGrath committed
319 320
    return buf;

321 322 323
  if (XSTRING (name)->size == 0)
    error ("Empty string for buffer name is not allowed");

324
  b = (struct buffer *) xmalloc (sizeof (struct buffer));
Roland McGrath's avatar
Roland McGrath committed
325

326 327 328 329 330 331
  b->size = sizeof (struct buffer) / sizeof (EMACS_INT);

  /* An ordinary buffer uses its own struct buffer_text.  */
  b->text = &b->own_text;
  b->base_buffer = 0;

Roland McGrath's avatar
Roland McGrath committed
332
  BUF_GAP_SIZE (b) = 20;
333
  BLOCK_INPUT;
Karl Heuer's avatar
Karl Heuer committed
334 335 336
  /* We allocate extra 1-byte at the tail and keep it always '\0' for
     anchoring a search.  */
  BUFFER_ALLOC (BUF_BEG_ADDR (b), (BUF_GAP_SIZE (b) + 1));
337
  UNBLOCK_INPUT;
Roland McGrath's avatar
Roland McGrath committed
338
  if (! BUF_BEG_ADDR (b))
339
    buffer_memory_full ();
Roland McGrath's avatar
Roland McGrath committed
340 341 342 343 344 345

  BUF_PT (b) = 1;
  BUF_GPT (b) = 1;
  BUF_BEGV (b) = 1;
  BUF_ZV (b) = 1;
  BUF_Z (b) = 1;
346 347 348 349 350
  BUF_PT_BYTE (b) = 1;
  BUF_GPT_BYTE (b) = 1;
  BUF_BEGV_BYTE (b) = 1;
  BUF_ZV_BYTE (b) = 1;
  BUF_Z_BYTE (b) = 1;
Roland McGrath's avatar
Roland McGrath committed
351
  BUF_MODIFF (b) = 1;
352
  BUF_OVERLAY_MODIFF (b) = 1;
353 354
  BUF_SAVE_MODIFF (b) = 1;
  BUF_INTERVALS (b) = 0;
Karl Heuer's avatar
Karl Heuer committed
355
  *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'.  */
Roland McGrath's avatar
Roland McGrath committed
356

357 358 359 360
  b->newline_cache = 0;
  b->width_run_cache = 0;
  b->width_table = Qnil;

Roland McGrath's avatar
Roland McGrath committed
361 362 363 364
  /* Put this on the chain of all buffers including killed ones.  */
  b->next = all_buffers;
  all_buffers = b;

365 366 367 368 369
  /* An ordinary buffer normally doesn't need markers
     to handle BEGV and ZV.  */
  b->pt_marker = Qnil;
  b->begv_marker = Qnil;
  b->zv_marker = Qnil;
370 371 372

  name = Fcopy_sequence (name);
  INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL);
Roland McGrath's avatar
Roland McGrath committed
373
  b->name = name;
374

Roland McGrath's avatar
Roland McGrath committed
375 376 377 378 379 380
  if (XSTRING (name)->data[0] != ' ')
    b->undo_list = Qnil;
  else
    b->undo_list = Qt;

  reset_buffer (b);
381
  reset_buffer_local_variables (b, 1);
Roland McGrath's avatar
Roland McGrath committed
382 383

  /* Put this in the alist of all live buffers.  */
384
  XSETBUFFER (buf, b);
Roland McGrath's avatar
Roland McGrath committed
385 386 387
  Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil));

  b->mark = Fmake_marker ();
388 389 390 391 392
  BUF_MARKERS (b) = Qnil;
  b->name = name;
  return buf;
}

393
DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, 2, 2,
394
       "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
395 396
  "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\
BASE-BUFFER should be an existing buffer (or buffer name).\n\
397 398 399
NAME should be a string which is not the name of an existing buffer.")
  (base_buffer, name)
     register Lisp_Object base_buffer, name;
400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430
{
  register Lisp_Object buf;
  register struct buffer *b;

  buf = Fget_buffer (name);
  if (!NILP (buf))
    error ("Buffer name `%s' is in use", XSTRING (name)->data);

  base_buffer = Fget_buffer (base_buffer);
  if (NILP (base_buffer))
    error ("No such buffer: `%s'",
	   XSTRING (XBUFFER (base_buffer)->name)->data);

  if (XSTRING (name)->size == 0)
    error ("Empty string for buffer name is not allowed");

  b = (struct buffer *) xmalloc (sizeof (struct buffer));

  b->size = sizeof (struct buffer) / sizeof (EMACS_INT);

  if (XBUFFER (base_buffer)->base_buffer)
    b->base_buffer = XBUFFER (base_buffer)->base_buffer;
  else
    b->base_buffer = XBUFFER (base_buffer);

  /* Use the base buffer's text object.  */
  b->text = b->base_buffer->text;

  BUF_BEGV (b) = BUF_BEGV (b->base_buffer);
  BUF_ZV (b) = BUF_ZV (b->base_buffer);
  BUF_PT (b) = BUF_PT (b->base_buffer);
431 432 433
  BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer);
  BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer);
  BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer);
434 435 436 437 438 439 440 441 442 443 444 445 446 447

  b->newline_cache = 0;
  b->width_run_cache = 0;
  b->width_table = Qnil;

  /* Put this on the chain of all buffers including killed ones.  */
  b->next = all_buffers;
  all_buffers = b;

  name = Fcopy_sequence (name);
  INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL);
  b->name = name;

  reset_buffer (b);
448
  reset_buffer_local_variables (b, 1);
449 450 451 452 453 454

  /* Put this in the alist of all live buffers.  */
  XSETBUFFER (buf, b);
  Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil));

  b->mark = Fmake_marker ();
Roland McGrath's avatar
Roland McGrath committed
455
  b->name = name;
456 457 458 459 460

  /* Make sure the base buffer has markers for its narrowing.  */
  if (NILP (b->base_buffer->pt_marker))
    {
      b->base_buffer->pt_marker = Fmake_marker ();
461 462 463
      set_marker_both (b->base_buffer->pt_marker, base_buffer,
		       BUF_PT (b->base_buffer),
		       BUF_PT_BYTE (b->base_buffer));
464 465 466 467
    }
  if (NILP (b->base_buffer->begv_marker))
    {
      b->base_buffer->begv_marker = Fmake_marker ();
468 469 470
      set_marker_both (b->base_buffer->begv_marker, base_buffer,
		       BUF_BEGV (b->base_buffer),
		       BUF_BEGV_BYTE (b->base_buffer));
471 472 473 474
    }
  if (NILP (b->base_buffer->zv_marker))
    {
      b->base_buffer->zv_marker = Fmake_marker ();
475 476 477
      set_marker_both (b->base_buffer->zv_marker, base_buffer,
		       BUF_ZV (b->base_buffer),
		       BUF_ZV_BYTE (b->base_buffer));
478
      XMARKER (b->base_buffer->zv_marker)->insertion_type = 1;
479 480 481
    }

  /* Give the indirect buffer markers for its narrowing.  */
482
  b->pt_marker = Fmake_marker ();
483
  set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b));
484
  b->begv_marker = Fmake_marker ();
485
  set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b));
486
  b->zv_marker = Fmake_marker ();
487
  set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b));
488
  XMARKER (b->zv_marker)->insertion_type = 1;
489

490
  return buf;
Roland McGrath's avatar
Roland McGrath committed
491 492
}

493 494
/* Reinitialize everything about a buffer except its name and contents
   and local variables.  */
Roland McGrath's avatar
Roland McGrath committed
495 496 497 498 499 500

void
reset_buffer (b)
     register struct buffer *b;
{
  b->filename = Qnil;
501
  b->file_truename = Qnil;
Roland McGrath's avatar
Roland McGrath committed
502 503
  b->directory = (current_buffer) ? current_buffer->directory : Qnil;
  b->modtime = 0;
504
  XSETFASTINT (b->save_length, 0);
Roland McGrath's avatar
Roland McGrath committed
505
  b->last_window_start = 1;
506 507
  /* It is more conservative to start out "changed" than "unchanged".  */
  b->clip_changed = 1;
Roland McGrath's avatar
Roland McGrath committed
508 509
  b->backed_up = Qnil;
  b->auto_save_modified = 0;
510
  b->auto_save_failure_time = -1;
Roland McGrath's avatar
Roland McGrath committed
511 512
  b->auto_save_file_name = Qnil;
  b->read_only = Qnil;
513 514
  b->overlays_before = Qnil;
  b->overlays_after = Qnil;
515
  XSETFASTINT (b->overlay_center, 1);
516
  b->mark_active = Qnil;
517
  b->point_before_scroll = Qnil;
518
  b->file_format = Qnil;
519
  b->last_selected_window = Qnil;
520
  XSETINT (b->display_count, 0);
521 522
  b->extra2 = Qnil;
  b->extra3 = Qnil;
Roland McGrath's avatar
Roland McGrath committed
523 524
}

525 526 527
/* Reset buffer B's local variables info.
   Don't use this on a buffer that has already been in use;
   it does not treat permanent locals consistently.
528 529 530 531 532
   Instead, use Fkill_all_local_variables.

   If PERMANENT_TOO is 1, then we reset permanent built-in
   buffer-local variables.  If PERMANENT_TOO is 0,
   we preserve those.  */
533

534 535
static void
reset_buffer_local_variables (b, permanent_too)
Roland McGrath's avatar
Roland McGrath committed
536
     register struct buffer *b;
537
     int permanent_too;
Roland McGrath's avatar
Roland McGrath committed
538 539
{
  register int offset;
540 541 542 543 544 545 546
  int dont_reset;

  /* Decide which built-in local variables to reset.  */
  if (permanent_too)
    dont_reset = 0;
  else
    dont_reset = buffer_permanent_local_flags;
Roland McGrath's avatar
Roland McGrath committed
547 548 549 550 551 552 553 554 555 556

  /* Reset the major mode to Fundamental, together with all the
     things that depend on the major mode.
     default-major-mode is handled at a higher level.
     We ignore it here.  */
  b->major_mode = Qfundamental_mode;
  b->keymap = Qnil;
  b->abbrev_table = Vfundamental_mode_abbrev_table;
  b->mode_name = QSFundamental;
  b->minor_modes = Qnil;
557 558 559 560 561 562 563 564

  /* If the standard case table has been altered and invalidated,
     fix up its insides first.  */
  if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0])
	 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1])
	 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2])))
    Fset_standard_case_table (Vascii_downcase_table);

Roland McGrath's avatar
Roland McGrath committed
565
  b->downcase_table = Vascii_downcase_table;
566 567 568
  b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0];
  b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1];
  b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2];
569
  b->invisibility_spec = Qt;
570 571 572
#ifndef DOS_NT
  b->buffer_file_type = Qnil;
#endif
573

Roland McGrath's avatar
Roland McGrath committed
574 575 576 577 578
#if 0
  b->sort_table = XSTRING (Vascii_sort_table);
  b->folding_sort_table = XSTRING (Vascii_folding_sort_table);
#endif /* 0 */

579
  /* Reset all (or most) per-buffer variables to their defaults.  */
Roland McGrath's avatar
Roland McGrath committed
580
  b->local_var_alist = Qnil;
581
  b->local_var_flags &= dont_reset;
Roland McGrath's avatar
Roland McGrath committed
582 583 584 585 586 587

  /* For each slot that has a default value,
     copy that into the slot.  */

  for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags;
       offset < sizeof (struct buffer);
588
       offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */
589 590
    {
      int flag = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags));
591 592 593 594 595 596
      if ((flag > 0
	   /* Don't reset a permanent local.  */
	   && ! (dont_reset & flag))
	  || flag == -2)
	*(Lisp_Object *)(offset + (char *)b)
	  = *(Lisp_Object *)(offset + (char *)&buffer_defaults);
597
    }
Roland McGrath's avatar
Roland McGrath committed
598 599
}

Roland McGrath's avatar
Roland McGrath committed
600 601 602 603 604
/* We split this away from generate-new-buffer, because rename-buffer
   and set-visited-file-name ought to be able to use this to really
   rename the buffer properly.  */

DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name,
605
  1, 2, 0,
Roland McGrath's avatar
Roland McGrath committed
606 607
  "Return a string that is the name of no existing buffer based on NAME.\n\
If there is no live buffer named NAME, then return NAME.\n\
Roland McGrath's avatar
Roland McGrath committed
608
Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
609
until an unused name is found, and then return that name.\n\
610
Optional second argument IGNORE specifies a name that is okay to use\n\
611
\(if it is in the sequence to be tried)\n\
612
even if a buffer with that name exists.")
613 614
 (name, ignore)
     register Lisp_Object name, ignore;
Roland McGrath's avatar
Roland McGrath committed
615 616 617 618 619 620 621 622
{
  register Lisp_Object gentemp, tem;
  int count;
  char number[10];

  CHECK_STRING (name, 0);

  tem = Fget_buffer (name);
Jim Blandy's avatar
Jim Blandy committed
623
  if (NILP (tem))
Roland McGrath's avatar
Roland McGrath committed
624
    return name;
Roland McGrath's avatar
Roland McGrath committed
625 626 627 628 629 630

  count = 1;
  while (1)
    {
      sprintf (number, "<%d>", ++count);
      gentemp = concat2 (name, build_string (number));
631
      tem = Fstring_equal (gentemp, ignore);
632 633
      if (!NILP (tem))
	return gentemp;
Roland McGrath's avatar
Roland McGrath committed
634
      tem = Fget_buffer (gentemp);
Jim Blandy's avatar
Jim Blandy committed
635
      if (NILP (tem))
Roland McGrath's avatar
Roland McGrath committed
636
	return gentemp;
Roland McGrath's avatar
Roland McGrath committed
637 638 639 640 641 642
    }
}


DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0,
  "Return the name of BUFFER, as a string.\n\
Roland McGrath's avatar
Roland McGrath committed
643
With no argument or nil as argument, return the name of the current buffer.")
Roland McGrath's avatar
Roland McGrath committed
644 645 646
  (buffer)
     register Lisp_Object buffer;
{
Jim Blandy's avatar
Jim Blandy committed
647
  if (NILP (buffer))
Roland McGrath's avatar
Roland McGrath committed
648 649 650 651 652 653 654 655 656 657 658
    return current_buffer->name;
  CHECK_BUFFER (buffer, 0);
  return XBUFFER (buffer)->name;
}

DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0,
  "Return name of file BUFFER is visiting, or nil if none.\n\
No argument or nil as argument means use the current buffer.")
  (buffer)
     register Lisp_Object buffer;
{
Jim Blandy's avatar
Jim Blandy committed
659
  if (NILP (buffer))
Roland McGrath's avatar
Roland McGrath committed
660 661 662 663 664
    return current_buffer->filename;
  CHECK_BUFFER (buffer, 0);
  return XBUFFER (buffer)->filename;
}

665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688
DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer,
       0, 1, 0,
  "Return the base buffer of indirect buffer BUFFER.\n\
If BUFFER is not indirect, return nil.")
  (buffer)
     register Lisp_Object buffer;
{
  struct buffer *base;
  Lisp_Object base_buffer;

  if (NILP (buffer))
    base = current_buffer->base_buffer;
  else
    {
      CHECK_BUFFER (buffer, 0);
      base = XBUFFER (buffer)->base_buffer;
    }

  if (! base)
    return Qnil;
  XSETBUFFER (base_buffer, base);
  return base_buffer;
}

Roland McGrath's avatar
Roland McGrath committed
689 690 691
DEFUN ("buffer-local-variables", Fbuffer_local_variables,
  Sbuffer_local_variables, 0, 1, 0,
  "Return an alist of variables that are buffer-local in BUFFER.\n\
692 693
Most elements look like (SYMBOL . VALUE), describing one variable.\n\
For a symbol that is locally unbound, just the symbol appears in the value.\n\
Roland McGrath's avatar
Roland McGrath committed
694 695 696 697 698 699
Note that storing new VALUEs in these elements doesn't change the variables.\n\
No argument or nil as argument means use current buffer as BUFFER.")
  (buffer)
     register Lisp_Object buffer;
{
  register struct buffer *buf;
700
  register Lisp_Object result;
Roland McGrath's avatar
Roland McGrath committed
701

Jim Blandy's avatar
Jim Blandy committed
702
  if (NILP (buffer))
Roland McGrath's avatar
Roland McGrath committed
703 704 705 706 707 708 709
    buf = current_buffer;
  else
    {
      CHECK_BUFFER (buffer, 0);
      buf = XBUFFER (buffer);
    }

710 711
  result = Qnil;

Roland McGrath's avatar
Roland McGrath committed
712
  {
713 714
    register Lisp_Object tail;
    for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr)
Roland McGrath's avatar
Roland McGrath committed
715
      {
716 717 718 719
	Lisp_Object val, elt;

	elt = XCONS (tail)->car;

720 721 722 723 724 725 726 727
	/* Reference each variable in the alist in buf.
	   If inquiring about the current buffer, this gets the current values,
	   so store them into the alist so the alist is up to date.
	   If inquiring about some other buffer, this swaps out any values
	   for that buffer, making the alist up to date automatically.  */
	val = find_symbol_value (XCONS (elt)->car);
	/* Use the current buffer value only if buf is the current buffer.  */
	if (buf != current_buffer)
728 729 730 731 732 733 734 735
	  val = XCONS (elt)->cdr;

	/* If symbol is unbound, put just the symbol in the list.  */
	if (EQ (val, Qunbound))
	  result = Fcons (XCONS (elt)->car, result);
	/* Otherwise, put (symbol . value) in the list.  */
	else
	  result = Fcons (Fcons (XCONS (elt)->car, val), result);
Roland McGrath's avatar
Roland McGrath committed
736 737 738 739 740 741 742 743 744
      }
  }

  /* Add on all the variables stored in special slots.  */
  {
    register int offset, mask;

    for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols;
	 offset < sizeof (struct buffer);
745
	 offset += (sizeof (EMACS_INT))) /* sizeof EMACS_INT == sizeof Lisp_Object */
Roland McGrath's avatar
Roland McGrath committed
746
      {
747
	mask = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags));
Roland McGrath's avatar
Roland McGrath committed
748
	if (mask == -1 || (buf->local_var_flags & mask))
749 750 751 752
	  if (SYMBOLP (*(Lisp_Object *)(offset
					+ (char *)&buffer_local_symbols)))
	    result = Fcons (Fcons (*((Lisp_Object *)
				     (offset + (char *)&buffer_local_symbols)),
753 754
				   *(Lisp_Object *)(offset + (char *)buf)),
			    result);
Roland McGrath's avatar
Roland McGrath committed
755 756
      }
  }
757 758

  return result;
Roland McGrath's avatar
Roland McGrath committed
759 760 761 762 763 764 765 766 767 768 769
}


DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p,
  0, 1, 0,
  "Return t if BUFFER was modified since its file was last read or saved.\n\
No argument or nil as argument means use current buffer as BUFFER.")
  (buffer)
     register Lisp_Object buffer;
{
  register struct buffer *buf;
Jim Blandy's avatar
Jim Blandy committed
770
  if (NILP (buffer))
Roland McGrath's avatar
Roland McGrath committed
771 772 773 774 775 776 777
    buf = current_buffer;
  else
    {
      CHECK_BUFFER (buffer, 0);
      buf = XBUFFER (buffer);
    }

778
  return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil;
Roland McGrath's avatar
Roland McGrath committed
779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794
}

DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p,
  1, 1, 0,
  "Mark current buffer as modified or unmodified according to FLAG.\n\
A non-nil FLAG means mark the buffer modified.")
  (flag)
     register Lisp_Object flag;
{
  register int already;
  register Lisp_Object fn;

#ifdef CLASH_DETECTION
  /* If buffer becoming modified, lock the file.
     If buffer becoming unmodified, unlock the file.  */

795
  fn = current_buffer->file_truename;
Jim Blandy's avatar
Jim Blandy committed
796
  if (!NILP (fn))
Roland McGrath's avatar
Roland McGrath committed
797
    {
798
      already = SAVE_MODIFF < MODIFF;
Jim Blandy's avatar
Jim Blandy committed
799
      if (!already && !NILP (flag))
Roland McGrath's avatar
Roland McGrath committed
800
	lock_file (fn);
Jim Blandy's avatar
Jim Blandy committed
801
      else if (already && NILP (flag))
Roland McGrath's avatar
Roland McGrath committed
802 803 804 805
	unlock_file (fn);
    }
#endif /* CLASH_DETECTION */

806
  SAVE_MODIFF = NILP (flag) ? MODIFF : 0;
Roland McGrath's avatar
Roland McGrath committed
807 808 809 810 811 812 813 814 815 816 817 818 819 820
  update_mode_lines++;
  return flag;
}

DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick,
  0, 1, 0,
  "Return BUFFER's tick counter, incremented for each change in text.\n\
Each buffer has a tick counter which is incremented each time the text in\n\
that buffer is changed.  It wraps around occasionally.\n\
No argument or nil as argument means use current buffer as BUFFER.")
  (buffer)
     register Lisp_Object buffer;
{
  register struct buffer *buf;
Jim Blandy's avatar
Jim Blandy committed
821
  if (NILP (buffer))
Roland McGrath's avatar
Roland McGrath committed
822 823 824 825 826 827 828 829 830 831
    buf = current_buffer;
  else
    {
      CHECK_BUFFER (buffer, 0);
      buf = XBUFFER (buffer);
    }

  return make_number (BUF_MODIFF (buf));
}

Roland McGrath's avatar
Roland McGrath committed
832
DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2,
833
       "sRename buffer (to new name): \nP",
Roland McGrath's avatar
Roland McGrath committed
834
  "Change current buffer's name to NEWNAME (a string).\n\
835
If second arg UNIQUE is nil or omitted, it is an error if a\n\
Roland McGrath's avatar
Roland McGrath committed
836
buffer named NEWNAME already exists.\n\
837
If UNIQUE is non-nil, come up with a new name using\n\
Roland McGrath's avatar
Roland McGrath committed
838
`generate-new-buffer-name'.\n\
839 840
Interactively, you can set UNIQUE with a prefix argument.\n\
We return the name we actually gave the buffer.\n\
Roland McGrath's avatar
Roland McGrath committed
841
This does not change the name of the visited file (if any).")
842 843
  (newname, unique)
     register Lisp_Object newname, unique;
Roland McGrath's avatar
Roland McGrath committed
844 845 846
{
  register Lisp_Object tem, buf;

847
  CHECK_STRING (newname, 0);
848

849
  if (XSTRING (newname)->size == 0)
850 851
    error ("Empty string is invalid as a buffer name");

852
  tem = Fget_buffer (newname);
853 854 855
  /* Don't short-circuit if UNIQUE is t.  That is a useful way to rename
     the buffer automatically so you can create another with the original name.
     It makes UNIQUE equivalent to
856
     (rename-buffer (generate-new-buffer-name NEWNAME)).  */
857
  if (NILP (unique) && XBUFFER (tem) == current_buffer)
858
    return current_buffer->name;
Jim Blandy's avatar
Jim Blandy committed
859
  if (!NILP (tem))
Roland McGrath's avatar
Roland McGrath committed
860
    {
861
      if (!NILP (unique))
862
	newname = Fgenerate_new_buffer_name (newname, current_buffer->name);
Roland McGrath's avatar
Roland McGrath committed
863
      else
864
	error ("Buffer name `%s' is in use", XSTRING (newname)->data);
Roland McGrath's avatar
Roland McGrath committed
865
    }
Roland McGrath's avatar
Roland McGrath committed
866

867
  current_buffer->name = newname;
868 869 870 871 872

  /* Catch redisplay's attention.  Unless we do this, the mode lines for
     any windows displaying current_buffer will stay unchanged.  */
  update_mode_lines++;

873
  XSETBUFFER (buf, current_buffer);
874
  Fsetcar (Frassq (buf, Vbuffer_alist), newname);
875 876
  if (NILP (current_buffer->filename)
      && !NILP (current_buffer->auto_save_file_name))
Roland McGrath's avatar
Roland McGrath committed
877
    call0 (intern ("rename-auto-save-file"));
878 879
  /* Refetch since that last call may have done GC.  */
  return current_buffer->name;
Roland McGrath's avatar
Roland McGrath committed
880 881
}

882
DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0,
Roland McGrath's avatar
Roland McGrath committed
883
  "Return most recently selected buffer other than BUFFER.\n\
884 885
Buffers not visible in windows are preferred to visible buffers,\n\
unless optional second argument VISIBLE-OK is non-nil.\n\
Roland McGrath's avatar
Roland McGrath committed
886 887
If no other buffer exists, the buffer `*scratch*' is returned.\n\
If BUFFER is omitted or nil, some interesting buffer is returned.")
888 889
  (buffer, visible_ok)
     register Lisp_Object buffer, visible_ok;
Roland McGrath's avatar
Roland McGrath committed
890
{
891
  Lisp_Object Fset_buffer_major_mode ();
892
  register Lisp_Object tail, buf, notsogood, tem, pred, add_ons;
Roland McGrath's avatar
Roland McGrath committed
893 894
  notsogood = Qnil;

895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911
  tail = Vbuffer_alist;
  pred = frame_buffer_predicate ();

  /* Consider buffers that have been seen in the selected frame
     before other buffers.  */
    
  tem = frame_buffer_list ();
  add_ons = Qnil;
  while (CONSP (tem))
    {
      if (BUFFERP (XCONS (tem)->car))
	add_ons = Fcons (Fcons (Qnil, XCONS (tem)->car), add_ons);
      tem = XCONS (tem)->cdr;
    }
  tail = nconc2 (Fnreverse (add_ons), tail);

  for (; !NILP (tail); tail = Fcdr (tail))
Roland McGrath's avatar
Roland McGrath committed
912 913 914 915 916 917
    {
      buf = Fcdr (Fcar (tail));
      if (EQ (buf, buffer))
	continue;
      if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ')
	continue;
918 919
      /* If the selected frame has a buffer_predicate,
	 disregard buffers that don't fit the predicate.  */
920
      if (!NILP (pred))
921
	{
922
	  tem = call1 (pred, buf);
923 924 925 926
	  if (NILP (tem))
	    continue;
	}

927
      if (NILP (visible_ok))
928
	tem = Fget_buffer_window (buf, Qt);
929 930
      else
	tem = Qnil;
Jim Blandy's avatar
Jim Blandy committed
931
      if (NILP (tem))
Roland McGrath's avatar
Roland McGrath committed
932
	return buf;
Jim Blandy's avatar
Jim Blandy committed
933
      if (NILP (notsogood))
Roland McGrath's avatar
Roland McGrath committed
934 935
	notsogood = buf;
    }
Jim Blandy's avatar
Jim Blandy committed
936
  if (!NILP (notsogood))
Roland McGrath's avatar
Roland McGrath committed
937
    return notsogood;
938 939 940
  buf = Fget_buffer_create (build_string ("*scratch*"));
  Fset_buffer_major_mode (buf);
  return buf;
Roland McGrath's avatar
Roland McGrath committed
941 942
}

943 944
DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo,
       0, 1, "",
945 946
  "Make BUFFER stop keeping undo information.\n\
No argument or nil as argument means do this for the current buffer.")
Jim Blandy's avatar
Jim Blandy committed
947 948
  (buffer)
     register Lisp_Object buffer;
Roland McGrath's avatar
Roland McGrath committed
949
{
Jim Blandy's avatar
Jim Blandy committed
950 951 952
  Lisp_Object real_buffer;

  if (NILP (buffer))
953
    XSETBUFFER (real_buffer, current_buffer);
Jim Blandy's avatar
Jim Blandy committed
954 955 956 957 958 959 960 961 962
  else
    {
      real_buffer = Fget_buffer (buffer);
      if (NILP (real_buffer))
	nsberror (buffer);
    }

  XBUFFER (real_buffer)->undo_list = Qt;

Roland McGrath's avatar
Roland McGrath committed
963 964 965 966 967 968 969
  return Qnil;
}

DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo,
       0, 1, "",
  "Start keeping undo information for buffer BUFFER.\n\
No argument or nil as argument means do this for the current buffer.")
Jim Blandy's avatar
Jim Blandy committed
970 971
  (buffer)
     register Lisp_Object buffer;
Roland McGrath's avatar
Roland McGrath committed
972
{
Jim Blandy's avatar
Jim Blandy committed
973
  Lisp_Object real_buffer;
Roland McGrath's avatar
Roland McGrath committed
974

Jim Blandy's avatar
Jim Blandy committed
975
  if (NILP (buffer))
976
    XSETBUFFER (real_buffer, current_buffer);
Roland McGrath's avatar
Roland McGrath committed
977 978
  else
    {
Jim Blandy's avatar
Jim Blandy committed
979 980 981
      real_buffer = Fget_buffer (buffer);
      if (NILP (real_buffer))
	nsberror (buffer);
Roland McGrath's avatar
Roland McGrath committed
982 983
    }

Jim Blandy's avatar
Jim Blandy committed
984 985
  if (EQ (XBUFFER (real_buffer)->undo_list, Qt))
    XBUFFER (real_buffer)->undo_list = Qnil;
Roland McGrath's avatar
Roland McGrath committed
986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005

  return Qnil;
}

/*
  DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
The buffer being killed will be current while the hook is running.\n\
See `kill-buffer'."
 */
DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ",
  "Kill the buffer BUFFER.\n\
The argument may be a buffer or may be the name of a buffer.\n\
An argument of nil means kill the current buffer.\n\n\
Value is t if the buffer is actually killed, nil if user says no.\n\n\
The value of `kill-buffer-hook' (which may be local to that buffer),\n\
if not void, is a list of functions to be called, with no arguments,\n\
before the buffer is actually killed.  The buffer to be killed is current\n\
when the hook functions are called.\n\n\
Any processes that have this buffer as the `process-buffer' are killed\n\
Richard M. Stallman's avatar
Richard M. Stallman committed
1006
with SIGHUP.")
1007 1008
  (buffer)
     Lisp_Object buffer;
Roland McGrath's avatar
Roland McGrath committed
1009 1010 1011 1012 1013 1014 1015
{
  Lisp_Object buf;
  register struct buffer *b;
  register Lisp_Object tem;
  register struct Lisp_Marker *m;
  struct gcpro gcpro1, gcpro2;

1016
  if (NILP (buffer))
Roland McGrath's avatar
Roland McGrath committed
1017 1018
    buf = Fcurrent_buffer ();
  else
1019
    buf = Fget_buffer (buffer);
Jim Blandy's avatar
Jim Blandy committed
1020
  if (NILP (buf))
1021
    nsberror (buffer);
Roland McGrath's avatar
Roland McGrath committed
1022 1023 1024

  b = XBUFFER (buf);

1025 1026 1027 1028
  /* Avoid trouble for buffer already dead.  */
  if (NILP (b->name))
    return Qnil;

Roland McGrath's avatar
Roland McGrath committed
1029
  /* Query if the buffer is still modified.  */
Jim Blandy's avatar
Jim Blandy committed
1030
  if (INTERACTIVE && !NILP (b->filename)
1031
      && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b))
Roland McGrath's avatar
Roland McGrath committed
1032
    {
1033
      GCPRO1 (buf);
Roland McGrath's avatar
Roland McGrath committed
1034 1035 1036
      tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
				     XSTRING (b->name)->data));
      UNGCPRO;
Jim Blandy's avatar
Jim Blandy committed
1037
      if (NILP (tem))
Roland McGrath's avatar
Roland McGrath committed
1038 1039 1040
	return Qnil;
    }

1041
  /* Run hooks with the buffer to be killed the current buffer.  */
Roland McGrath's avatar
Roland McGrath committed
1042 1043 1044
  {
    register Lisp_Object val;
    int count = specpdl_ptr - specpdl;
Richard M. Stallman's avatar