--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/buffer.c	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,2782 @@
+/* Buffer manipulation primitives for XEmacs.
+   Copyright (C) 1985-1989, 1992-1995 Free Software Foundation, Inc.
+   Copyright (C) 1995 Sun Microsystems, Inc.
+   Copyright (C) 1995, 1996 Ben Wing.
+
+This file is part of XEmacs.
+
+XEmacs is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+XEmacs 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 XEmacs; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* Synched up with: Mule 2.0, FSF 19.30. */
+
+/* Authorship:
+
+   FSF: long ago.
+   JWZ: some changes for Lemacs, long ago. (e.g. separate buffer
+        list per frame.)
+   Mly: a few changes for buffer-local vars, 19.8 or 19.9.
+   Ben Wing: some changes and cleanups for Mule, 19.12.
+ */
+
+/* This file contains functions that work with buffer objects.
+   Functions that manipulate a buffer's text, however, are not
+   in this file:
+
+   1) The low-level functions that actually know about the
+      implementation of a buffer's text are located in insdel.c.
+   2) The higher-level (mostly Lisp) functions that manipulate a
+      buffer's text are in editfns.c.
+   3) The highest-level Lisp commands are in cmds.c.
+
+   However:
+
+   -- Functions that know about syntax tables (forward-word,
+      scan-sexps, etc.) are in syntax.c, as are functions
+      that manipulate syntax tables.
+   -- Functions that know about case tables (upcase, downcase,
+      etc.) are in casefiddle.c.  Functions that manipulate
+      case tables (case-table-p, set-case-table, etc.) are
+      in casetab.c.
+   -- Functions that do searching and replacing are in
+      search.c.  The low-level functions that implement
+      regular expressions are in regex.c.
+
+   Also:
+
+   -- Some file and process functions (in fileio.c and process.c)
+      copy text from or insert text into a buffer; they call
+      low-level functions in insdel.c to do this.
+   -- insdel.c calls low-level functions in undo.c and extents.c
+      to record buffer modifications for undoing and to handle
+      extent adjustment and extent-data creation and insertion.
+
+*/
+
+#include <config.h>
+#include "lisp.h"
+
+#include "buffer.h"
+#include "commands.h"
+#include "elhash.h"
+#include "extents.h"
+#include "faces.h"
+#include "frame.h"
+#include "insdel.h"
+#include "process.h"            /* for kill_buffer_processes */
+#ifdef REGION_CACHE_NEEDS_WORK
+#include "region-cache.h"
+#endif
+#include "symeval.h"
+#include "syntax.h"
+#include "sysdep.h"	/* for getwd */
+#include "window.h"
+
+#include "sysfile.h"
+
+struct buffer *current_buffer;	/* the current buffer */
+
+/* This structure holds the default values of the buffer-local variables
+   defined with DEFVAR_BUFFER_LOCAL, 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.  */
+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 0, then there is a DEFVAR_BUFFER_LOCAL
+   for the slot, but there is no default value for it; the corresponding
+   slot in buffer_defaults is not used except to initialize newly-created
+   buffers.
+
+   If a slot is -1, then there is a DEFVAR_BUFFER_LOCAL for it
+   as well as a default value which is used to initialize newly-created
+   buffers and as a reset-value when local-vars are killed.
+
+   If a slot is -2, there is no DEFVAR_BUFFER_LOCAL for it. 
+   (The slot is always local, but there's no lisp variable for it.)
+   The default value is only used to initialize newly-creation buffers. 
+   
+   If a slot is -3, then there is no DEFVAR_BUFFER_LOCAL for it but
+   there is a default which is used to initialize newly-creation
+   buffers and as a reset-value when local-vars are killed.
+
+   
+   */
+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. */
+static Lisp_Object Vbuffer_local_symbols;
+
+/* 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.
+   Note that there is a per-frame copy of this as well; the frame slot
+   and the global variable contain the same data, but possibly in different
+   orders, so that the buffer ordering can be per-frame.
+  */
+Lisp_Object Vbuffer_alist;
+
+/* Functions to call before and after each text change. */
+Lisp_Object Qbefore_change_functions;
+Lisp_Object Qafter_change_functions;
+Lisp_Object Vbefore_change_functions;
+Lisp_Object Vafter_change_functions;
+
+/* #### Obsolete, for compatibility */
+Lisp_Object Qbefore_change_function;
+Lisp_Object Qafter_change_function;
+Lisp_Object Vbefore_change_function;
+Lisp_Object Vafter_change_function;
+
+#if 0 /* FSFmacs */
+Lisp_Object Vtransient_mark_mode;
+#endif
+
+/* 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;
+
+/* 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;
+
+/* Non-nil means delete a buffer's auto-save file when the buffer is saved. */
+Lisp_Object Vdelete_auto_save_files;
+
+Lisp_Object Qbuffer_live_p;
+Lisp_Object Qbuffer_or_string_p;
+
+/* List of functions to call before changing an unmodified buffer.  */
+Lisp_Object Vfirst_change_hook;
+Lisp_Object Qfirst_change_hook;
+
+Lisp_Object Qfundamental_mode;
+Lisp_Object Qmode_class;
+Lisp_Object Qpermanent_local;
+
+Lisp_Object Qprotected_field;
+
+Lisp_Object QSFundamental;	/* A string "Fundamental" */
+Lisp_Object QSscratch;          /* "*scratch*" */
+Lisp_Object Qdefault_directory;
+
+Lisp_Object Qkill_buffer_hook;
+Lisp_Object Qbuffer_file_name, Qbuffer_undo_list;
+
+Lisp_Object Qrename_auto_save_file;
+
+Lisp_Object Qget_file_buffer;
+Lisp_Object Qchange_major_mode_hook, Vchange_major_mode_hook;
+
+Lisp_Object Qfind_file_compare_truenames;
+
+Lisp_Object Qswitch_to_buffer;
+
+/* Two thresholds controlling how much undo information to keep.  */
+int undo_threshold;
+int undo_high_threshold;
+
+int find_file_compare_truenames;
+int find_file_use_truenames;
+
+
+static void reset_buffer_local_variables (struct buffer *, int first_time);
+static void nuke_all_buffer_slots (struct buffer *b, Lisp_Object zap);
+static Lisp_Object mark_buffer (Lisp_Object, void (*) (Lisp_Object));
+static void print_buffer (Lisp_Object, Lisp_Object, int);
+/* We do not need a finalize method to handle a buffer's children list
+   because all buffers have `kill-buffer' applied to them before
+   they disappear, and the children removal happens then. */
+DEFINE_LRECORD_IMPLEMENTATION ("buffer", buffer,
+                               mark_buffer, print_buffer, 0, 0, 0,
+			       struct buffer);
+
+#ifdef ENERGIZE
+extern void mark_energize_buffer_data (struct buffer *b,
+				       void (*markobj) (Lisp_Object));
+#endif
+
+Lisp_Object
+make_buffer (struct buffer *buf)
+{
+  Lisp_Object obj;
+  XSETBUFFER (obj, buf);
+  return obj;
+}
+
+static Lisp_Object
+mark_buffer (Lisp_Object obj, void (*markobj) (Lisp_Object))
+{
+  struct buffer *buf = XBUFFER (obj);
+
+  /* Truncate undo information. */
+  buf->undo_list = truncate_undo_list (buf->undo_list,
+                                       undo_threshold,
+                                       undo_high_threshold);
+
+#define MARKED_SLOT(x) ((markobj) (buf->x));
+#include "bufslots.h"
+#undef MARKED_SLOT
+
+#ifdef ENERGIZE
+  mark_energize_buffer_data (XBUFFER (obj), markobj);
+#endif
+
+  ((markobj) (buf->extent_info));
+
+  /* Don't mark normally through the children slot.
+     (Actually, in this case, it doesn't matter.)
+   */
+  mark_conses_in_list (buf->indirect_children);
+
+  if (buf->base_buffer)
+    {
+      Lisp_Object base_buf_obj = Qnil;
+
+      XSETBUFFER (base_buf_obj, buf->base_buffer);
+      return base_buf_obj;
+    }
+  else
+    return Qnil;
+}
+
+static void
+print_buffer (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
+{
+  struct buffer *b = XBUFFER (obj);
+
+  if (print_readably) 
+    {
+      if (!BUFFER_LIVE_P (b))
+	error ("printing unreadable object #<killed buffer>");
+      else
+	error ("printing unreadable object #<buffer %s>", 
+	       string_data (XSTRING (b->name)));
+    }
+  else if (!BUFFER_LIVE_P (b))
+    write_c_string ("#<killed buffer>", printcharfun);
+  else if (escapeflag)
+    {
+      write_c_string ("#<buffer ", printcharfun);
+      print_internal (b->name, printcharfun, 1);
+      write_c_string (">", printcharfun);
+    }
+  else
+    {
+      print_internal (b->name, printcharfun, 0);
+    }
+}
+  
+
+DEFUN ("bufferp", Fbufferp, Sbufferp, 1, 1, 0 /*
+T if OBJECT is an editor buffer.
+*/ )
+  (object)
+     Lisp_Object object;
+{
+  if (BUFFERP (object))
+    return Qt;
+  return Qnil;
+}
+
+DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0 /*
+T if OBJECT is an editor buffer that has not been deleted.
+*/ )
+  (object)
+     Lisp_Object object;
+{
+  if (BUFFERP (object) && BUFFER_LIVE_P (XBUFFER (object)))
+    return Qt;
+  return Qnil;
+}
+
+static void
+nsberror (Lisp_Object spec)
+{
+  if (STRINGP (spec))
+    error ("No buffer named %s", string_data (XSTRING (spec)));
+  signal_simple_error ("Invalid buffer argument", spec);
+}
+
+DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0 /*
+Return a list of all existing live buffers.
+The order is specific to the selected frame; if the optional FRAME
+argument is provided, the ordering for that frame is returned instead.
+If the FRAME argument is t, then the global (non-frame) ordering is
+returned instead.
+*/ )
+  (frame)
+  Lisp_Object frame;
+{
+  Lisp_Object list;
+  if (EQ (frame, Qt))
+    list = Vbuffer_alist;
+  else
+    list = decode_frame (frame)->buffer_alist;
+  return Fmapcar (Qcdr, list);
+}
+
+Lisp_Object
+get_buffer (Lisp_Object name, int error_if_deleted_or_does_not_exist)
+{
+  Lisp_Object buf;
+
+  if (BUFFERP (name))
+    {
+      if (!BUFFER_LIVE_P (XBUFFER (name)))
+        {
+          if (error_if_deleted_or_does_not_exist)
+            nsberror (name);
+          return (Qnil);
+        }
+      return name;
+    }
+  else
+    {
+      struct gcpro gcpro1;
+
+      CHECK_STRING (name);
+      name = LISP_GETTEXT (name); /* I18N3 */
+      GCPRO1 (name);
+      buf = Fcdr (Fassoc (name, Vbuffer_alist));
+      UNGCPRO;
+      if (NILP (buf) && error_if_deleted_or_does_not_exist)
+	nsberror (name);
+      return (buf);
+    }
+}
+
+struct buffer *
+decode_buffer (Lisp_Object buffer, int allow_string)
+{
+  if (NILP (buffer))
+    {
+      return current_buffer;
+    }
+  else if (STRINGP (buffer))
+    {
+      if (allow_string)
+	return XBUFFER (get_buffer (buffer, 1));
+      else
+	CHECK_BUFFER (buffer);    /* This will cause a wrong-type error. */
+    }
+
+  CHECK_LIVE_BUFFER (buffer);
+  return XBUFFER (buffer);
+}
+
+DEFUN ("decode-buffer", Fdecode_buffer, Sdecode_buffer, 1, 1, 0 /*
+Validate BUFFER or if BUFFER is nil, return the current buffer.
+If BUFFER is a valid buffer or a string representing a valid buffer,
+the corresponding buffer object will be returned.  Otherwise an error
+will be signaled.
+*/ )
+  (buffer)
+  Lisp_Object buffer;
+{
+  struct buffer *b = decode_buffer (buffer, 1);
+  XSETBUFFER (buffer, b);
+  return buffer;
+}
+
+#if 0 /* FSFmacs */
+/* bleagh!!! */
+/* Like Fassoc, but use Fstring_equal to compare
+   (which ignores text properties),
+   and don't ever QUIT.  */
+
+static Lisp_Object
+assoc_ignore_text_properties (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;
+}
+
+#endif
+
+DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0 /*
+Return the buffer named NAME (a string).
+If there is no live buffer named NAME, return nil.
+NAME may also be a buffer; if so, the value is that buffer.
+*/ )
+  (name)
+     Lisp_Object name;
+{
+#ifdef I18N3
+  /* #### Doc string should indicate that the buffer name will get
+     translated. */
+#endif
+
+  /* #### This might return a dead buffer.  This is gross.  This is
+     called FSF compatibility. */
+  if (BUFFERP (name))
+    return name;
+  return (get_buffer (name, 0));
+  /* FSFmacs 19.29 calls assoc_ignore_text_properties() here.
+     Bleagh!! */
+}
+
+
+DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0 /*
+Return the buffer visiting file FILENAME (a string).
+The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
+If there is no such live buffer, return nil.
+
+Normally, the comparison is done by canonicalizing FILENAME (using
+`expand-file-name') and comparing that to the value of `buffer-file-name'
+for each existing buffer.  However,  If `find-file-compare-truenames' is
+non-nil, FILENAME will be converted to its truename and the search will be
+done on each buffer's value of `buffer-file-truename' instead of
+`buffer-file-name'.  Otherwise, if `find-file-use-truenames' is non-nil,
+FILENAME will be converted to its truename and used for searching, but
+the search will still be done on `buffer-file-name'.
+*/ )
+  (filename)
+     Lisp_Object filename;
+{
+  /* This function can GC */
+  REGISTER Lisp_Object tail, buf, tem;
+  struct gcpro gcpro1;
+
+#ifdef I18N3
+  /* DO NOT translate the filename. */
+#endif
+  GCPRO1 (filename);
+  CHECK_STRING (filename);
+  filename = Fexpand_file_name (filename, Qnil);
+  {
+    /* If the file name has special constructs in it,
+       call the corresponding file handler.  */
+    Lisp_Object handler = Ffind_file_name_handler (filename, Qget_file_buffer);
+    if (!NILP (handler))
+      {
+	UNGCPRO;
+	return call2 (handler, Qget_file_buffer, filename);
+      }
+  }
+  UNGCPRO;
+
+  if (find_file_compare_truenames || find_file_use_truenames)
+    {
+      struct gcpro ngcpro1, ngcpro2, ngcpro3;
+      Lisp_Object fn = Qnil;
+      Lisp_Object dn = Qnil;
+
+      NGCPRO3 (fn, dn, filename);
+      fn = Ffile_truename (filename, Qnil);
+      if (NILP (fn))
+	{
+	  dn = Ffile_name_directory (filename);
+	  fn = Ffile_truename (dn, Qnil);
+	  if (! NILP (fn)) dn = fn;
+	  fn = Fexpand_file_name (Ffile_name_nondirectory (filename),
+				  dn);
+	}
+      filename = fn;
+      NUNGCPRO;
+    }
+
+  for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail))
+    {
+      buf = Fcdr (XCAR (tail));
+      if (!BUFFERP (buf)) continue;
+      if (!STRINGP (XBUFFER (buf)->filename)) continue;
+      tem = Fstring_equal (filename,
+			   (find_file_compare_truenames
+			    ? XBUFFER (buf)->file_truename
+			    : XBUFFER (buf)->filename));
+      if (!NILP (tem))
+	return buf;
+    }
+  return Qnil;
+}
+
+
+static void
+push_buffer_alist (Lisp_Object name, Lisp_Object buf)
+{
+  Lisp_Object cons = Fcons (name, buf);
+  Lisp_Object frmcons, devcons, concons;
+
+  Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (cons, Qnil));
+  FRAME_LOOP_NO_BREAK (frmcons, devcons, concons)
+    {
+      struct frame *f;
+      f = XFRAME (XCAR (frmcons));
+      f->buffer_alist = nconc2 (f->buffer_alist, Fcons (cons, Qnil));
+    }
+}
+
+static void
+delete_from_buffer_alist (Lisp_Object buf)
+{
+  Lisp_Object cons = Frassq (buf, Vbuffer_alist);
+  Lisp_Object frmcons, devcons, concons;
+  if (NILP (cons))
+    return; /* abort() ? */
+  Vbuffer_alist = delq_no_quit (cons, Vbuffer_alist);
+
+  FRAME_LOOP_NO_BREAK (frmcons, devcons, concons)
+    {
+      struct frame *f;
+      f = XFRAME (XCAR (frmcons));
+      f->buffer_alist = delq_no_quit (cons, f->buffer_alist);
+    }
+}
+
+Lisp_Object
+get_truename_buffer (REGISTER Lisp_Object filename)
+{
+  /* FSFmacs has its own code here and doesn't call get-file-buffer.
+     That's because their equivalent of find-file-compare-truenames
+     (find-file-existing-other-name) isn't looked at in get-file-buffer.
+     This way is more correct. */
+  int count = specpdl_depth ();
+
+  specbind (Qfind_file_compare_truenames, Qt);
+  return unbind_to (count, Fget_file_buffer (filename));
+}
+
+static struct buffer *
+allocate_buffer (void)
+{
+  struct buffer *b = alloc_lcrecord (sizeof (struct buffer), lrecord_buffer);
+
+  copy_lcrecord (b, XBUFFER (Vbuffer_defaults));
+
+  return b;
+}
+
+static Lisp_Object
+finish_init_buffer (struct buffer *b, Lisp_Object name)
+{
+  Lisp_Object buf;
+
+  XSETBUFFER (buf, b);
+
+  name = Fcopy_sequence (name);
+  /* #### This really does not need to be called.  We already
+     initialized the buffer-local variables in allocate_buffer().
+     local_var_alist is set to Qnil at the same point, in
+     nuke_all_buffer_slots(). */
+  reset_buffer_local_variables (b, 1);
+  b->directory = ((current_buffer) ? current_buffer->directory : Qnil);
+
+  b->last_window_start = 1;
+
+  b->name = name;
+  if (string_byte (XSTRING (name), 0) != ' ')
+    b->undo_list = Qnil;
+  else
+    b->undo_list = Qt;
+
+  /* initialize the extent list */
+  init_buffer_extents (b);
+
+  /* Put this in the alist of all live buffers.  */
+  push_buffer_alist (name, buf);
+
+  init_buffer_markers (b);
+
+  b->generated_modeline_string = Fmake_string (make_int (84), make_int (' '));
+  b->modeline_extent_table = make_lisp_hashtable (20, HASHTABLE_KEY_WEAK,
+						  HASHTABLE_EQ);
+
+  return buf;
+}
+
+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.
+A new buffer is created if there is no live buffer named NAME.
+If NAME starts with a space, the new buffer does not keep undo information.
+If NAME is a buffer instead of a string, then it is the value returned.
+The value is never nil.
+*/ )  
+  (name)
+     Lisp_Object name;
+{
+  /* This function can GC */
+  Lisp_Object buf;
+  REGISTER struct buffer *b;
+
+#ifdef I18N3
+  /* #### Doc string should indicate that the buffer name will get
+     translated. */
+#endif
+
+  name = LISP_GETTEXT (name);
+  buf = Fget_buffer (name);
+  if (!NILP (buf))
+    return buf;
+
+  if (string_length (XSTRING (name)) == 0)
+    error ("Empty string for buffer name is not allowed");
+
+  b = allocate_buffer ();
+
+  b->text = &b->own_text;
+  b->base_buffer = 0;
+  b->indirect_children = Qnil;
+  init_buffer_text (b, 0);
+
+  return finish_init_buffer (b, name);
+}
+
+DEFUN ("make-indirect-buffer",
+       Fmake_indirect_buffer, Smake_indirect_buffer, 2, 2,
+       "bMake indirect buffer (to buffer): \nBName of indirect buffer: " /*
+Create and return an indirect buffer for buffer BASE, named NAME.
+BASE should be an existing buffer (or buffer name).
+NAME should be a string which is not the name of an existing buffer.
+If BASE is an indirect buffer itself, the base buffer for that buffer
+ is made the base buffer for the newly created buffer. (Thus, there will
+ never be indirect buffers whose base buffers are themselves indirect.)
+*/ )
+  (base_buffer, name)
+     Lisp_Object base_buffer, name;
+{
+  error ("make-indirect-buffer not yet implemented, oops");
+  return Qnil;
+
+#if 0 /* #### implement this!  Need various changes in insdel.c */
+  Lisp_Object buf;
+  REGISTER struct buffer *b;
+
+  name = LISP_GETTEXT (name);
+  buf = Fget_buffer (name);
+  if (!NILP (buf))
+    error ("Buffer name `%s' is in use", string_data (XSTRING (name)));
+
+  base_buffer = Fget_buffer (base_buffer);
+  if (NILP (base_buffer))
+    error ("No such buffer: `%s'",
+	   string_data (XSTRING (XBUFFER (base_buffer)->name)));
+
+  if (string_length (XSTRING (name)) == 0)
+    error ("Empty string for buffer name is not allowed");
+
+  b = allocate_buffer ();
+
+  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;
+  b->indirect_children = Qnil;
+  XSETBUFFER (buf, b);
+  b->base_buffer->indirect_children =
+    Fcons (buf, b->base_buffer->indirect_children);
+  init_buffer_text (b, 1);
+
+  return finish_init_buffer (b, name);
+#endif /* 0 */
+}
+
+
+static void
+reset_buffer_local_variables (struct buffer *b, int first_time)
+{
+  struct buffer *def = XBUFFER (Vbuffer_defaults);
+
+  b->local_var_flags = 0;
+  /* For each slot that has a default value,
+     copy that into the slot.  */
+#define MARKED_SLOT(slot)						\
+  { int mask = XINT (buffer_local_flags.slot);				\
+    if ((mask > 0 || mask == -1 || mask == -3)				\
+	&& (first_time							\
+	    || NILP (Fget (XBUFFER (Vbuffer_local_symbols)->slot,	\
+			   Qpermanent_local, Qnil))))			\
+      b->slot = def->slot;						\
+  }
+#include "bufslots.h"
+#undef MARKED_SLOT
+}
+
+
+/* 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,
+  1, 2, 0 /*
+Return a string that is the name of no existing buffer based on NAME.
+If there is no live buffer named NAME, then return NAME.
+Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
+until an unused name is found, and then return that name.
+Optional second argument IGNORE specifies a name that is okay to use
+\(if it is in the sequence to be tried)
+even if a buffer with that name exists.
+*/ )
+ (name, ignore)
+     Lisp_Object name, ignore;
+{
+  REGISTER Lisp_Object gentemp, tem;
+  int count;
+  char number[10];
+
+  CHECK_STRING (name);
+
+  name = LISP_GETTEXT (name);
+#ifdef I18N3
+  /* #### Doc string should indicate that the buffer name will get
+     translated. */
+#endif
+
+  tem = Fget_buffer (name);
+  if (NILP (tem))
+    return (name);
+
+  count = 1;
+  while (1)
+    {
+      sprintf (number, "<%d>", ++count);
+      gentemp = concat2 (name, build_string (number));
+      if (!NILP (ignore))
+        {
+          tem = Fstring_equal (gentemp, ignore);
+          if (!NILP (tem))
+            return gentemp;
+        }
+      tem = Fget_buffer (gentemp);
+      if (NILP (tem))
+	return (gentemp);
+    }
+}
+
+
+DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0 /*
+Return the name of BUFFER, as a string.
+With no argument or nil as argument, return the name of the current buffer.
+*/ )
+  (buffer)
+     Lisp_Object buffer;
+{
+  /* For compatibility, we allow a dead buffer here.
+     Earlier versions of Emacs didn't provide buffer-live-p. */
+  if (NILP (buffer))
+    return current_buffer->name;
+  CHECK_BUFFER (buffer);
+  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.
+No argument or nil as argument means use the current buffer.
+*/ )
+  (buffer)
+     Lisp_Object buffer;
+{
+  /* For compatibility, we allow a dead buffer here.  Yuck! */
+  if (NILP (buffer))
+    return current_buffer->filename;
+  CHECK_BUFFER (buffer);
+  return XBUFFER (buffer)->filename;
+}
+
+DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer,
+       0, 1, 0 /*
+Return the base buffer of indirect buffer BUFFER.
+If BUFFER is not indirect, return nil.
+*/ )
+  (buffer)
+     Lisp_Object buffer;
+{
+  struct buffer *buf = decode_buffer (buffer, 0);
+  struct buffer *base = buf->base_buffer;
+  Lisp_Object base_buffer = Qnil;
+
+  if (! base)
+    return Qnil;
+  XSETBUFFER (base_buffer, base);
+  return base_buffer;
+}
+
+DEFUN ("buffer-indirect-children", Fbuffer_indirect_children,
+       Sbuffer_indirect_children,
+       0, 1, 0 /*
+Return a list of all indirect buffers whose base buffer is BUFFER.
+If BUFFER is indirect, the return value will always be nil; see
+`make-indirect-buffer'.
+*/ )
+  (buffer)
+     Lisp_Object buffer;
+{
+  struct buffer *buf = decode_buffer (buffer, 0);
+
+  return Fcopy_sequence (buf->indirect_children);
+}
+
+/* Map MAPFUN over all buffers that share the same text as BUF
+   (this includes BUF).  Pass two arguments to MAPFUN: a buffer,
+   and CLOSURE.  If any invocation of MAPFUN returns non-zero,
+   halt immediately and return that value.  Otherwise, continue
+   the mapping to the end and return 0. */
+
+int
+map_over_sharing_buffers (struct buffer *buf,
+			  int (*mapfun) (struct buffer *buf, void *closure),
+			  void *closure)
+{
+  int result;
+  Lisp_Object tail;
+
+  if (buf->base_buffer)
+    {
+      buf = buf->base_buffer;
+      assert (!buf->base_buffer);
+    }
+
+  result = (mapfun) (buf, closure);
+  if (result)
+    return result;
+
+  LIST_LOOP (tail, buf->indirect_children)
+    {
+      Lisp_Object buffer = XCAR (tail);
+      result = (mapfun) (XBUFFER (buffer), closure);
+      if (result)
+	return result;
+    }
+
+  return 0;
+}
+
+DEFUN ("buffer-local-variables", Fbuffer_local_variables,
+  Sbuffer_local_variables, 0, 1, 0 /*
+Return an alist of variables that are buffer-local in BUFFER.
+Most elements look like (SYMBOL . VALUE), describing one variable.
+For a symbol that is locally unbound, just the symbol appears in the value.
+Note that storing new VALUEs in these elements doesn't change the variables.
+No argument or nil as argument means use current buffer as BUFFER.
+*/ )
+  (buffer)
+     Lisp_Object buffer;
+{
+  struct buffer *buf = decode_buffer (buffer, 0);
+  Lisp_Object result = Qnil;
+
+  {
+    Lisp_Object tail;
+    for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail))
+      {
+        Lisp_Object elt = XCAR (tail);
+	/* 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.  */
+        Lisp_Object val = find_symbol_value (XCAR (elt));
+	/* Use the current buffer value only if buf is the current buffer.  */
+	if (buf != current_buffer)
+	  val = XCDR (elt);
+
+	/* If symbol is unbound, put just the symbol in the list.  */
+	if (UNBOUNDP (val))
+	  result = Fcons (XCAR (elt), result);
+	/* Otherwise, put (symbol . value) in the list.  */
+	else
+	  result = Fcons (Fcons (XCAR (elt), val), result);
+      }
+  }
+
+  /* Add on all the variables stored in special slots.  */
+  {
+    struct buffer *syms = XBUFFER (Vbuffer_local_symbols);
+#define MARKED_SLOT(slot)					\
+    { int mask = XINT (buffer_local_flags.slot);		\
+      if (mask == 0 || mask == -1				\
+	  || ((mask > 0) && (buf->local_var_flags & mask)))	\
+        result = Fcons (Fcons (syms->slot, buf->slot), result);	\
+    }
+#include "bufslots.h"
+#undef MARKED_SLOT
+  }
+  return (result);
+}
+
+DEFUN ("buffer-dedicated-frame", Fbuffer_dedicated_frame,
+       Sbuffer_dedicated_frame,
+       0, 1, 0 /*
+Return the frame dedicated to this BUFFER, or nil if there is none.
+No argument or nil as argument means use current buffer as BUFFER.
+*/ )
+  (buffer)
+     Lisp_Object buffer;
+{
+  struct buffer *buf = decode_buffer (buffer, 0);
+
+  /* XEmacs addition: if the frame is dead, silently make it go away. */
+  if (!NILP (buf->dedicated_frame) &&
+      !FRAME_LIVE_P (XFRAME (buf->dedicated_frame)))
+    buf->dedicated_frame = Qnil;
+    
+  return buf->dedicated_frame;
+}
+
+DEFUN ("set-buffer-dedicated-frame", Fset_buffer_dedicated_frame,
+       Sset_buffer_dedicated_frame,
+       2, 2, 0 /*
+For this BUFFER, set the FRAME dedicated to it.
+FRAME must be a frame or nil.
+*/ )
+  (buffer, frame)
+     Lisp_Object buffer, frame;
+{
+  struct buffer *buf = decode_buffer (buffer, 0);
+
+  if (!NILP (frame))
+    CHECK_LIVE_FRAME (frame); /* XEmacs change */
+
+  return buf->dedicated_frame = frame;
+}
+
+
+
+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.
+No argument or nil as argument means use current buffer as BUFFER.
+*/ )
+  (buffer)
+     Lisp_Object buffer;
+{
+  struct buffer *buf = decode_buffer (buffer, 0);
+
+  return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil;
+}
+
+DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p,
+  1, 2, 0 /*
+Mark BUFFER as modified or unmodified according to FLAG.
+A non-nil FLAG means mark the buffer modified.  No argument or nil
+as BUFFER means use current buffer.
+*/ )
+  (flag, buffer)
+     Lisp_Object flag, buffer;
+{
+  /* This function can GC */
+  Lisp_Object fn;
+  struct buffer *buf = decode_buffer (buffer, 0);
+
+#ifdef ENERGIZE
+  Lisp_Object starting_flag = 
+    (BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf)) ? Qt : Qnil;
+  Lisp_Object argument_flag = (NILP (flag)) ? Qnil : Qt;
+#endif  
+
+#ifdef CLASH_DETECTION
+  /* If buffer becoming modified, lock the file.
+     If buffer becoming unmodified, unlock the file.  */
+
+  fn = buf->file_truename;
+  if (!NILP (fn))
+    {
+      int already = BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf);
+      if (already == NILP (flag))
+	{
+	  int count = specpdl_depth ();
+	  /* lock_file() and unlock_file() currently use current_buffer */
+	  record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
+	  set_buffer_internal (buf);
+	  if (!already && !NILP (flag))
+	    lock_file (fn);
+	  else if (already && NILP (flag))
+	    unlock_file (fn);
+	  unbind_to (count, Qnil);
+	}
+    }
+#endif                          /* CLASH_DETECTION */
+
+  /* This is often called when the buffer contents are altered but we
+     don't want to treat the changes that way (e.g. selective
+     display).  We still need to make sure redisplay realizes that the
+     contents have potentially altered and it needs to do some
+     work. */
+  BUF_MODIFF (buf)++;
+  BUF_SAVE_MODIFF (buf) = NILP (flag) ? BUF_MODIFF (buf) : 0;
+  MARK_MODELINE_CHANGED;
+
+#ifdef ENERGIZE
+  /* don't send any notification if we are "setting" the modification bit
+     to be the same as it already was */
+  if (!EQ (starting_flag, argument_flag))
+    {
+      extern Lisp_Object Qenergize_buffer_modified_hook;
+      int count = specpdl_depth ();
+      record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
+      set_buffer_internal (buf);
+      va_run_hook_with_args (Qenergize_buffer_modified_hook, 3,
+			     flag, make_int (BUF_BEG (buf)),
+			     make_int (BUF_Z (buf)));
+      unbind_to (count, Qnil);
+    }
+#endif /* ENERGIZE */
+
+  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.
+Each buffer has a tick counter which is incremented each time the text in
+that buffer is changed.  It wraps around occasionally.
+No argument or nil as argument means use current buffer as BUFFER.
+*/ )
+  (buffer)
+     Lisp_Object buffer;
+{
+  struct buffer *buf = decode_buffer (buffer, 0);
+
+  return make_int (BUF_MODIFF (buf));
+}
+
+DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2,
+       "sRename buffer (to new name): \nP" /*
+Change current buffer's name to NEWNAME (a string).
+If second arg UNIQUE is nil or omitted, it is an error if a
+buffer named NEWNAME already exists.
+If UNIQUE is non-nil, come up with a new name using
+`generate-new-buffer-name'.
+Interactively, one can set UNIQUE with a prefix argument.
+Returns the name we actually gave the buffer.
+This does not change the name of the visited file (if any).
+*/ )
+  (newname, unique)
+     Lisp_Object newname, unique;
+{
+  /* This function can GC */
+  Lisp_Object tem, buf;
+
+#ifdef I18N3
+  /* #### Doc string should indicate that the buffer name will get
+     translated. */
+#endif
+  CHECK_STRING (newname);
+  newname = LISP_GETTEXT (newname);
+
+  if (string_length (XSTRING (newname)) == 0)
+    error ("Empty string is invalid as a buffer name");
+
+  tem = Fget_buffer (newname);
+  /* 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
+     (rename-buffer (generate-new-buffer-name NEWNAME)).  */
+  /* XEmacs change: added check for nil */
+  if (NILP (unique) && !NILP (tem) && XBUFFER (tem) == current_buffer)
+    return current_buffer->name;
+  if (!NILP (tem))
+    {
+      if (!NILP (unique))
+	newname = Fgenerate_new_buffer_name (newname, current_buffer->name);
+      else
+	error ("Buffer name \"%s\" is in use",
+	       string_data (XSTRING (newname)));
+    }
+
+  current_buffer->name = newname;
+
+  /* Catch redisplay's attention.  Unless we do this, the modelines for
+     any windows displaying current_buffer will stay unchanged.  */
+  MARK_MODELINE_CHANGED;
+
+  buf = Fcurrent_buffer ();
+
+  /* The aconses in the Vbuffer_alist are shared with frame->buffer_alist,
+     so this will change it in the per-frame ordering as well. */
+  Fsetcar (Frassq (buf, Vbuffer_alist), newname);
+  if (NILP (current_buffer->filename)
+      && !NILP (current_buffer->auto_save_file_name))
+    call0 (Qrename_auto_save_file);
+  /* refetch since that last call may have done GC */
+  /* (hypothetical relocating GC) */
+  return current_buffer->name;
+}
+
+DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0 /*
+Return most recently selected buffer other than BUFFER.
+Buffers not visible in windows are preferred to visible buffers,
+unless optional third argument VISIBLE-OK is non-nil.
+If no other buffer exists, the buffer `*scratch*' is returned.
+If BUFFER is omitted or nil, some interesting buffer is returned.
+
+The ordering is for this frame; If second optional argument FRAME
+is provided, then the ordering is for that frame.  If the second arg
+is t, then the global ordering is returned.
+
+Note: In FSF Emacs, this function takes two arguments: BUFFER and
+VISIBLE-OK.
+*/ )
+  (buffer, frame, visible_ok)
+     Lisp_Object buffer, frame, visible_ok;
+{
+  /* This function can GC */
+  Lisp_Object tail, buf, notsogood, tem;
+  Lisp_Object alist;
+
+  notsogood = Qnil;
+
+  if (EQ (frame, Qt))
+    alist = Vbuffer_alist;
+  else
+    {
+      struct frame *f = decode_frame (frame);
+
+      XSETFRAME (frame, f);
+      alist = f->buffer_alist;
+    }
+
+  for (tail = alist; !NILP (tail); tail = Fcdr (tail))
+    {
+      buf = Fcdr (Fcar (tail));
+      if (EQ (buf, buffer))
+	continue;
+      if (string_byte (XSTRING (XBUFFER (buf)->name), 0) == ' ')
+	continue;
+      /* If FRAME has a buffer_predicate,
+	 disregard buffers that don't fit the predicate.  */
+      if (FRAMEP (frame))
+	{
+	  tem = XFRAME (frame)->buffer_predicate;	
+	  if (!NILP (tem))
+	    {
+	      tem = call1 (tem, buf);
+	      if (NILP (tem))
+		continue;
+	    }
+	}
+
+      if (NILP (visible_ok))
+	{
+	  /* get-buffer-window will handle nil or t frame */
+	  tem = Fget_buffer_window (buf, frame, Qnil);
+	}
+      else
+	tem = Qnil;
+      if (NILP (tem))
+	return buf;
+      if (NILP (notsogood))
+	notsogood = buf;
+    }
+  if (!NILP (notsogood))
+    return notsogood;
+  return Fget_buffer_create (QSscratch);
+}
+
+/* XEmacs change: Make this argument required because this is a dangerous
+   function. */
+DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 1, 1, "" /*
+Make BUFFER stop keeping undo information.
+Any undo records it already has are discarded.
+*/ )
+  (buffer)
+     Lisp_Object buffer;
+{
+  /* Allowing nil is an RMSism */
+  struct buffer *real_buf = decode_buffer (buffer, 1);
+  real_buf->undo_list = Qt;
+  return Qnil;
+}
+
+DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo,
+       0, 1, "" /*
+Start keeping undo information for buffer BUFFER.
+No argument or nil as argument means do this for the current buffer.
+*/ )
+  (buffer)
+     Lisp_Object buffer;
+{
+  /* Allowing nil is an RMSism */
+  struct buffer *real_buf = decode_buffer (buffer, 1);
+  if (EQ (real_buf->undo_list, Qt))
+    real_buf->undo_list = Qnil;
+
+  return Qnil;
+}
+
+DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: " /*
+Kill the buffer BUFNAME.
+The argument may be a buffer or may be the name of a buffer.
+An argument of nil means kill the current buffer.
+
+Value is t if the buffer is actually killed, nil if user says no.
+
+The value of `kill-buffer-hook' (which may be local to that buffer),
+if not void, is a list of functions to be called, with no arguments,
+before the buffer is actually killed.  The buffer to be killed is current
+when the hook functions are called.
+
+Any processes that have this buffer as the `process-buffer' are killed
+with `delete-process'.
+*/ )
+  (bufname)
+     Lisp_Object bufname;
+{
+  /* This function can GC */
+  Lisp_Object buf;
+  REGISTER struct buffer *b;
+  struct gcpro gcpro1, gcpro2;
+
+  if (NILP (bufname))
+    buf = Fcurrent_buffer ();
+  else if (BUFFERP (bufname))
+    buf = bufname;
+  else
+    {
+      buf = get_buffer (bufname, 0);
+      if (NILP (buf)) nsberror (bufname);
+    }
+
+  b = XBUFFER (buf);
+
+  /* OK to delete an already-deleted buffer.  */
+  if (!BUFFER_LIVE_P (b))
+    return Qnil;
+
+  /* Don't kill the minibuffer now current.  */
+  if (EQ (buf, Vminibuffer_zero))
+    return Qnil;
+
+  /* Or the echo area.  */
+  if (EQ (buf, Vecho_area_buffer))
+    return Qnil;
+
+  /* Query if the buffer is still modified.  */
+  if (INTERACTIVE && !NILP (b->filename)
+      && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b))
+    {
+      Lisp_Object killp;
+      GCPRO2 (buf, bufname);
+      killp = call1
+	(Qyes_or_no_p,
+	 (emacs_doprnt_string_c
+	  ((CONST Bufbyte *) GETTEXT ("Buffer %s modified; kill anyway? "),
+	   Qnil, -1, string_data (XSTRING (b->name)))));
+      UNGCPRO;
+      if (NILP (killp))
+	return Qnil;
+      b = XBUFFER (buf);        /* Hypothetical relocating GC. */
+    }
+
+  /* Run hooks with the buffer to be killed temporarily selected,
+     unless the buffer is already dead (could have been deleted
+     in the question above).
+   */
+  if (BUFFER_LIVE_P (b))
+    {
+      int speccount = specpdl_depth ();
+      Lisp_Object tail = Qnil;
+
+      GCPRO2 (buf, tail);
+      record_unwind_protect (save_excursion_restore, save_excursion_save ());
+      Fset_buffer (buf);
+
+      /* First run the query functions; if any query is answered no,
+         don't kill the buffer.  */
+      for (tail = Vkill_buffer_query_functions;
+           !NILP (tail);
+           tail = Fcdr (tail))
+	{
+	  if (NILP (call0 (Fcar (tail))))
+	    {
+	      UNGCPRO;
+	      return unbind_to (speccount, Qnil);
+	    }
+	}
+
+      /* Then run the hooks.  */
+      run_hook (Qkill_buffer_hook);
+#ifdef HAVE_X_WINDOWS
+      /* If an X selection was in this buffer, disown it.
+	 We could have done this by simply adding this function to the
+	 kill-buffer-hook, but the user might mess that up.
+	 */
+      if (EQ (Vwindow_system, Qx))
+	call0 (intern ("xselect-kill-buffer-hook"));
+      /* #### generalize me! */
+#endif
+      unbind_to (speccount, Qnil);
+      UNGCPRO;
+      b = XBUFFER (buf);        /* Hypothetical relocating GC. */
+  }
+
+  /* We have no more questions to ask.  Verify that it is valid
+     to kill the buffer.  This must be done after the questions
+     since anything can happen within yes-or-no-p.  */
+
+  /* Don't kill the minibuffer now current.  */
+  if (EQ (buf, XWINDOW (minibuf_window)->buffer))
+    return Qnil;
+
+  /* Might have been deleted during the last question above */
+  if (!BUFFER_LIVE_P (b))
+    return Qnil;
+
+  /* When we kill a base buffer, kill all its indirect buffers.
+     We do it at this stage so nothing terrible happens if they
+     ask questions or their hooks get errors.  */
+  if (! b->base_buffer)
+    {
+      Lisp_Object rest;
+
+      GCPRO1 (buf);
+
+      LIST_LOOP (rest, b->indirect_children)
+	Fkill_buffer (XCAR (rest));
+
+      UNGCPRO;
+    }
+  
+  /* Make this buffer not be current.
+     In the process, notice if this is the sole visible buffer
+     and give up if so.  */
+  if (b == current_buffer)
+    {
+      Fset_buffer (Fother_buffer (buf, Qnil, Qnil));
+      if (b == current_buffer)
+	return Qnil;
+    }
+
+  /* Now there is no question: we can kill the buffer.  */
+
+#ifdef CLASH_DETECTION
+  /* Unlock this buffer's file, if it is locked.  */
+  unlock_buffer (b);
+#endif /* CLASH_DETECTION */
+
+  {
+    int speccount = specpdl_depth ();
+    specbind (Qinhibit_quit, Qt);
+
+    kill_buffer_processes (buf);
+
+    /* #### This is a problem if this buffer is in a dedicated window.
+       Need to undedicate any windows of this buffer first (and delete them?)
+       */
+    Freplace_buffer_in_windows (buf);
+
+    delete_from_buffer_alist (buf);
+
+    font_lock_buffer_was_killed (b);
+
+    /* Delete any auto-save file, if we saved it in this session.  */
+    if (STRINGP (b->auto_save_file_name)
+	&& b->auto_save_modified != 0
+	&& BUF_SAVE_MODIFF (b) < b->auto_save_modified)
+      {
+	if (!NILP (Vdelete_auto_save_files))
+	  internal_delete_file (b->auto_save_file_name);
+      }
+
+    uninit_buffer_markers (b);
+
+    kill_buffer_local_variables (b);
+
+    b->name = Qnil;
+    uninit_buffer_text (b, !!b->base_buffer);
+    b->undo_list = Qnil;
+    uninit_buffer_extents (b);
+    if (b->base_buffer)
+      {
+#ifdef ERROR_CHECK_BUFPOS
+	assert (!NILP (memq_no_quit (buf, b->base_buffer->indirect_children)));
+#endif
+	b->base_buffer->indirect_children =
+	  delq_no_quit (buf, b->base_buffer->indirect_children);
+      }
+
+  /* Clear away all Lisp objects, so that they
+     won't be protected from GC. */
+    nuke_all_buffer_slots (b, Qnil);
+
+    unbind_to (speccount, Qnil);
+  }
+  return Qt;
+}
+
+DEFUN ("record-buffer", Frecord_buffer,
+       Srecord_buffer, 1, 1, 0 /*
+Put the element for buffer BUF at the front of buffer-alist.
+This is done when a buffer is selected \"visibly\".
+It keeps buffer-alist in the order of recency of selection
+so that other-buffer will return something nice.
+*/ )
+  (buf)
+     Lisp_Object buf;
+{
+  REGISTER Lisp_Object lynk, prev;
+  struct frame *f = selected_frame ();
+
+  prev = Qnil;
+  for (lynk = Vbuffer_alist; CONSP (lynk); lynk = XCDR (lynk))
+    {
+      if (EQ (XCDR (XCAR (lynk)), buf))
+	break;
+      prev = lynk;
+    }
+  /* Effectively do Vbuffer_alist = delq_no_quit (lynk, Vbuffer_alist) */
+  if (NILP (prev))
+    Vbuffer_alist = XCDR (Vbuffer_alist);
+  else
+    XCDR (prev) = XCDR (XCDR (prev));
+  XCDR (lynk) = Vbuffer_alist;
+  Vbuffer_alist = lynk;
+
+  /* That was the global one.  Now do the same thing for the
+     per-frame buffer-alist. */
+  prev = Qnil;
+  for (lynk = f->buffer_alist; CONSP (lynk); lynk = XCDR (lynk))
+    {
+      if (EQ (XCDR (XCAR (lynk)), buf))
+	break;
+      prev = lynk;
+    }
+  /* Effectively do f->buffer_alist = delq_no_quit (lynk, f->buffer_alist) */
+  if (NILP (prev))
+    f->buffer_alist = XCDR (f->buffer_alist);
+  else
+    XCDR (prev) = XCDR (XCDR (prev));
+  XCDR (lynk) = f->buffer_alist;
+  f->buffer_alist = lynk;
+  return Qnil;
+}
+
+DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode,
+       Sset_buffer_major_mode, 1, 1, 0 /*
+Set an appropriate major mode for BUFFER, according to `default-major-mode'.
+Use this function before selecting the buffer, since it may need to inspect
+the current buffer's major mode.
+*/ )
+  (buf)
+     Lisp_Object buf;
+{
+  int speccount = specpdl_depth ();
+  REGISTER Lisp_Object function, tem;
+
+  function = XBUFFER (Vbuffer_defaults)->major_mode;
+  if (NILP (function))
+    {
+      tem = Fget (current_buffer->major_mode, Qmode_class, Qnil);
+      if (NILP (tem))
+	function = current_buffer->major_mode;
+    }
+
+  if (NILP (function) || EQ (function, Qfundamental_mode))
+    return Qnil;
+
+  /* To select a nonfundamental mode,
+     select the buffer temporarily and then call the mode function. */
+
+  record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
+
+  Fset_buffer (buf);
+  call0 (function);
+
+  return unbind_to (speccount, Qnil);
+}
+
+void
+switch_to_buffer (Lisp_Object bufname, Lisp_Object norecord)
+{
+  call2 (Qswitch_to_buffer, bufname, norecord);
+}
+
+
+DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0 /*
+Return the current buffer as a Lisp object.
+*/ )
+  ()
+{
+  Lisp_Object buf;
+  XSETBUFFER (buf, current_buffer);
+  return buf;
+}
+
+/* Set the current buffer to B.  */
+
+void
+set_buffer_internal (struct buffer *b)
+{
+  REGISTER struct buffer *old_buf;
+  REGISTER Lisp_Object tail;
+
+  if (current_buffer == b)
+    return;
+
+  INVALIDATE_PIXEL_TO_GLYPH_CACHE;
+
+  old_buf = current_buffer;
+  current_buffer = b;
+  invalidate_current_column ();   /* invalidate indentation cache */
+
+#ifdef HAVE_FEP
+  if (!noninteractive && initialized)
+    {
+      extern Lisp_Object Ffep_force_on (), Ffep_force_off (), Ffep_get_mode ();
+
+      old_buf->fep_mode = Ffep_get_mode ();
+      
+      if (!NILP (current_buffer->fep_mode))
+	Ffep_force_on ();
+      else
+	Ffep_force_off ();
+  }
+#endif
+
+  if (old_buf)
+    {
+      /* Put the undo list back in the base buffer, so that it appears
+	 that an indirect buffer shares the undo list of its base.  */
+      if (old_buf->base_buffer)
+	old_buf->base_buffer->undo_list = old_buf->undo_list;
+    }
+
+  /* Get the undo list from the base buffer, so that it appears
+     that an indirect buffer shares the undo list of its base.  */
+  if (b->base_buffer)
+    b->undo_list = b->base_buffer->undo_list;
+
+  /* Look down buffer's list of local Lisp variables
+     to find and update any that forward into C variables. */
+
+  LIST_LOOP (tail, b->local_var_alist)
+    {
+      Lisp_Object sym = XCAR (XCAR (tail));
+      Lisp_Object valcontents = XSYMBOL (sym)->value;
+      if (SYMBOL_VALUE_MAGIC_P (valcontents))
+	{
+	  /* Just reference the variable
+	     to cause it to become set for this buffer.  */
+	  (void) find_symbol_value (sym);
+	}
+    }
+
+  /* Do the same with any others that were local to the previous buffer */
+
+  if (old_buf)
+    {
+      for (tail = old_buf->local_var_alist; 
+           !NILP (tail);
+           tail = XCDR (tail))
+	{
+	  Lisp_Object sym = XCAR (XCAR (tail));
+	  Lisp_Object valcontents = XSYMBOL (sym)->value;
+
+	  if (SYMBOL_VALUE_MAGIC_P (valcontents))
+	    {
+	      /* Just reference the variable
+		 to cause it to become set for this buffer.  */
+	      (void) find_symbol_value (sym);
+	    }
+	}
+    }
+}
+
+DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0 /*
+Make the buffer BUFNAME current for editing operations.
+BUFNAME may be a buffer or the name of an existing buffer.
+See also `save-excursion' when you want to make a buffer current temporarily.
+This function does not display the buffer, so its effect ends
+when the current command terminates.
+Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.
+*/ )
+  (bufname)
+     Lisp_Object bufname;
+{
+  Lisp_Object buffer;
+  buffer = get_buffer (bufname, 0);
+  if (NILP (buffer))
+    error ("Selecting deleted or non-existent buffer");
+  set_buffer_internal (XBUFFER (buffer));
+  return buffer;
+}
+
+
+DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only,
+				   Sbarf_if_buffer_read_only, 0, 3, 0 /*
+Signal a `buffer-read-only' error if the buffer is read-only.
+Optional argument BUFFER defaults to the current buffer.
+
+If optional argument START is non-nil, all extents in the buffer
+which overlap that part of the buffer are checked to ensure none has a
+`read-only' property. (Extents that lie completely within the range,
+however, are not checked.) END defaults to the value of START.
+
+If START and END are equal, the range checked is [START, END] (i.e.
+closed on both ends); otherwise, the range checked is (START, END)
+(open on both ends), except that extents that lie completely within
+[START, END] are not checked.  See `extent-in-region-p' for a fuller
+discussion.
+*/ )
+  (buffer, start, end)
+  Lisp_Object buffer, start, end;
+{
+  struct buffer *b = decode_buffer (buffer, 0);
+  Bufpos s, e;
+
+  if (NILP (start))
+    s = e = -1;
+  else
+    {
+      if (NILP (end))
+	end = start;
+      get_buffer_range_char (b, start, end, &s, &e, 0);
+    }
+  barf_if_buffer_read_only (b, s, e);
+
+  return (Qnil);
+}
+
+static void
+bury_buffer_1 (Lisp_Object buffer, Lisp_Object before,
+	       Lisp_Object *buffer_alist)
+{
+  Lisp_Object aelt = rassq_no_quit (buffer, *buffer_alist);
+  Lisp_Object lynk = memq_no_quit (aelt, *buffer_alist);
+  Lisp_Object iter, before_before;
+
+  *buffer_alist = delq_no_quit (aelt, *buffer_alist);
+  for (before_before = Qnil, iter = *buffer_alist;
+       !NILP (iter) && !EQ (XCDR (XCAR (iter)), before);
+       before_before = iter, iter = XCDR (iter))
+    ;
+  XCDR (lynk) = iter;
+  if (!NILP (before_before))
+    XCDR (before_before) = lynk;
+  else
+    *buffer_alist = lynk;
+}
+
+DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 2, "" /*
+Put BUFFER at the end of the list of all buffers.
+There it is the least likely candidate for `other-buffer' to return;
+thus, the least likely buffer for \\[switch-to-buffer] to select by default.
+If BUFFER is nil or omitted, bury the current buffer.
+Also, if BUFFER is nil or omitted, remove the current buffer from the
+selected window if it is displayed there.
+If BEFORE is non-nil, it specifies a buffer before which BUFFER
+will be placed, instead of being placed at the end.
+*/ )
+  (buffer, before)
+     Lisp_Object buffer, before;
+{
+  /* This function can GC */
+  struct buffer *buf = decode_buffer (buffer, 1);
+  /* If we're burying the current buffer, unshow it.  */
+  /* Note that the behavior of (bury-buffer nil) and
+     (bury-buffer (current-buffer)) is not the same.
+     This is illogical but is historical.  Changing it
+     breaks mh-e and TeX and such packages. */
+  if (NILP (buffer))
+    switch_to_buffer (Fother_buffer (Fcurrent_buffer (), Qnil, Qnil), Qnil);
+  XSETBUFFER (buffer, buf);
+
+  if (!NILP (before))
+    before = get_buffer (before, 1);
+
+  if (EQ (before, buffer))
+    error ("Cannot place a buffer before itself");
+
+  bury_buffer_1 (buffer, before, &Vbuffer_alist);
+  bury_buffer_1 (buffer, before, &selected_frame ()->buffer_alist);
+
+  return Qnil;
+}
+
+
+DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 1, "*" /*
+Delete the entire contents of the BUFFER.
+Any clipping restriction in effect (see `narrow-to-region') is removed,
+so the buffer is truly empty after this.
+BUFFER defaults to the current buffer if omitted.
+*/ )
+     (buffer)
+     Lisp_Object buffer;
+{
+  /* This function can GC */
+  struct buffer *b = decode_buffer (buffer, 1);
+  /* #### yuck yuck yuck.  This is gross.  The old echo-area code,
+     however, was the only place that called erase_buffer() with a
+     non-zero NO_CLIP argument.
+
+     Someone needs to fix up the redisplay code so it is smarter
+     about this, so that the NO_CLIP junk isn't necessary. */
+  int no_clip = (b == XBUFFER (Vecho_area_buffer));
+
+  INVALIDATE_PIXEL_TO_GLYPH_CACHE;
+
+  widen_buffer (b, no_clip);
+  buffer_delete_range (b, BUF_BEG (b), BUF_Z (b), 0);
+  b->last_window_start = 1;
+
+  /* Prevent warnings, or suspension of auto saving, that would happen
+     if future size is less than past size.  Use of erase-buffer
+     implies that the future text is not really related to the past text.  */
+  b->save_length = Qzero;
+
+  zmacs_region_stays = 0;
+  return Qnil;
+}
+
+
+
+DEFUN ("kill-all-local-variables", Fkill_all_local_variables,
+       Skill_all_local_variables, 0, 0, 0 /*
+Switch to Fundamental mode by killing current buffer's local variables.
+Most local variable bindings are eliminated so that the default values
+become effective once more.  Also, the syntax table is set from
+`standard-syntax-table', local keymap is set to nil,
+the abbrev table is set from `fundamental-mode-abbrev-table',
+and all specifier specifications whose locale is the current buffer
+are removed.  This function also forces redisplay of the modeline.
+
+Every function to select a new major mode starts by
+calling this function.
+
+As a special exception, local variables whose names have
+a non-nil `permanent-local' property are not eliminated by this function.
+
+The first thing this function does is run
+the normal hook `change-major-mode-hook'.
+*/ )
+  ()
+{
+  /* This function can GC */
+  run_hook (Qchange_major_mode_hook);
+
+  reset_buffer_local_variables (current_buffer, 0);
+
+  kill_buffer_local_variables (current_buffer);
+
+  kill_specifier_buffer_locals (Fcurrent_buffer ());
+
+  /* Force modeline redisplay.  Useful here because all major mode
+     commands call this function.  */
+  MARK_MODELINE_CHANGED;
+
+  return Qnil;
+}
+
+#ifdef MEMORY_USAGE_STATS
+
+struct buffer_stats
+{
+  int text;
+  int markers;
+  int extents;
+  int other;
+};
+
+static int
+compute_buffer_text_usage (struct buffer *b, struct overhead_stats *ovstats)
+{
+  int malloc_use;
+  int was_requested;
+  int gap;
+
+  was_requested = b->text->z - 1;
+  gap = b->text->gap_size;
+  malloc_use = malloced_storage_size (b->text->beg, was_requested + gap, 0);
+  ovstats->gap_overhead += gap;
+  ovstats->was_requested += was_requested;
+  ovstats->malloc_overhead += malloc_use - (was_requested + gap);
+  return malloc_use;
+}
+
+static void
+compute_buffer_usage (struct buffer *b, struct buffer_stats *stats,
+		      struct overhead_stats *ovstats)
+{
+  memset (stats, 0, sizeof (*stats));
+  stats->other += malloced_storage_size (b, sizeof (struct buffer), ovstats);
+  stats->text += compute_buffer_text_usage (b, ovstats);
+  stats->markers += compute_buffer_marker_usage (b, ovstats);
+  stats->extents += compute_buffer_extent_usage (b, ovstats);
+}
+
+DEFUN ("buffer-memory-usage", Fbuffer_memory_usage, Sbuffer_memory_usage,
+  1, 1, 0 /*
+Return stats about the memory usage of buffer BUFFER.
+The values returned are in the form an alist of usage types and byte
+counts.  The byte counts attempt to encompass all the memory used
+by the buffer (separate from the memory logically associated with a
+buffer or frame), including internal structures and any malloc()
+overhead associated with them.  In practice, the byte counts are
+underestimated because certain memory usage is very hard to determine
+(e.g. the amount of memory used inside the Xt library or inside the
+X server) and because there is other stuff that might logically
+be associated with a window, buffer, or frame (e.g. window configurations,
+glyphs) but should not obviously be included in the usage counts.
+
+Multiple slices of the total memory usage may be returned, separated
+by a nil.  Each slice represents a particular view of the memory, a
+particular way of partitioning it into groups.  Within a slice, there
+is no overlap between the groups of memory, and each slice collectively
+represents all the memory concerned.
+*/ )
+  (buffer)
+     Lisp_Object buffer;
+{
+  struct buffer_stats stats;
+  struct overhead_stats ovstats;
+
+  CHECK_BUFFER (buffer); /* dead buffers should be allowed, no? */
+  memset (&ovstats, 0, sizeof (ovstats));
+  compute_buffer_usage (XBUFFER (buffer), &stats, &ovstats);
+
+  return nconc2 (list4 (Fcons (Qtext, make_int (stats.text)),
+			Fcons (Qmarkers, make_int (stats.markers)),
+			Fcons (Qextents, make_int (stats.extents)),
+			Fcons (Qother, make_int (stats.other))),
+		 list5 (Qnil,
+			Fcons (Qactually_requested,
+			       make_int (ovstats.was_requested)),
+			Fcons (Qmalloc_overhead,
+			       make_int (ovstats.malloc_overhead)),
+			Fcons (Qgap_overhead,
+			       make_int (ovstats.malloc_overhead)),
+			Fcons (Qdynarr_overhead,
+			       make_int (ovstats.dynarr_overhead))));
+}
+
+#endif /* MEMORY_USAGE_STATS */
+
+void
+syms_of_buffer (void)
+{
+  defsymbol (&Qbuffer_live_p, "buffer-live-p");
+  defsymbol (&Qbuffer_or_string_p, "buffer-or-string-p");
+  defsymbol (&Qmode_class, "mode-class");
+  defsymbol (&Qrename_auto_save_file, "rename-auto-save-file");
+  defsymbol (&Qkill_buffer_hook, "kill-buffer-hook");
+  defsymbol (&Qpermanent_local, "permanent-local");
+
+  defsymbol (&Qfirst_change_hook, "first-change-hook");
+  defsymbol (&Qbefore_change_functions, "before-change-functions");
+  defsymbol (&Qafter_change_functions, "after-change-functions");
+
+  /* #### Obsolete, for compatibility */
+  defsymbol (&Qbefore_change_function, "before-change-function");
+  defsymbol (&Qafter_change_function, "after-change-function");
+
+  defsymbol (&Qbuffer_file_name, "buffer-file-name");
+  defsymbol (&Qbuffer_undo_list, "buffer-undo-list");
+  defsymbol (&Qdefault_directory, "default-directory");
+
+  defsymbol (&Qget_file_buffer, "get-file-buffer");
+  defsymbol (&Qchange_major_mode_hook, "change-major-mode-hook");
+
+  defsymbol (&Qfundamental_mode, "fundamental-mode");
+
+  defsymbol (&Qfind_file_compare_truenames, "find-file-compare-truenames");
+
+  defsymbol (&Qswitch_to_buffer, "switch-to-buffer");
+
+  defsubr (&Sbufferp);
+  defsubr (&Sbuffer_live_p);
+  defsubr (&Sbuffer_list);
+  defsubr (&Sdecode_buffer);
+  defsubr (&Sget_buffer);
+  defsubr (&Sget_file_buffer);
+  defsubr (&Sget_buffer_create);
+  defsubr (&Smake_indirect_buffer);
+
+  defsubr (&Sgenerate_new_buffer_name);
+  defsubr (&Sbuffer_name);
+  defsubr (&Sbuffer_file_name);
+  defsubr (&Sbuffer_base_buffer);
+  defsubr (&Sbuffer_indirect_children);
+  defsubr (&Sbuffer_local_variables);
+  defsubr (&Sbuffer_dedicated_frame);
+  defsubr (&Sset_buffer_dedicated_frame);
+  defsubr (&Sbuffer_modified_p);
+  defsubr (&Sset_buffer_modified_p);
+  defsubr (&Sbuffer_modified_tick);
+  defsubr (&Srename_buffer);
+  defsubr (&Sother_buffer);
+  defsubr (&Sbuffer_disable_undo);
+  defsubr (&Sbuffer_enable_undo);
+  defsubr (&Skill_buffer);
+  defsubr (&Serase_buffer);
+  defsubr (&Srecord_buffer);
+  defsubr (&Sset_buffer_major_mode);
+  defsubr (&Scurrent_buffer);
+  defsubr (&Sset_buffer);
+  defsubr (&Sbarf_if_buffer_read_only);
+  defsubr (&Sbury_buffer);
+  defsubr (&Skill_all_local_variables);
+#ifdef MEMORY_USAGE_STATS
+  defsubr (&Sbuffer_memory_usage);
+#endif
+
+  deferror (&Qprotected_field, "protected-field",
+	    "Attempt to modify a protected field", Qerror);
+}
+
+/* initialize the buffer routines */
+void
+vars_of_buffer (void)
+{
+  /* This function can GC */
+  staticpro (&QSFundamental);
+  staticpro (&QSscratch);
+  staticpro (&Vbuffer_alist);
+
+  QSFundamental = Fpurecopy (build_string ("Fundamental"));
+  QSscratch = Fpurecopy (build_string (DEFER_GETTEXT ("*scratch*")));
+
+  Vbuffer_alist = Qnil;
+  current_buffer = 0;
+
+  DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook /*
+List of hooks to be run before killing local variables in a buffer.
+This should be used by by any mode that temporarily alters the contents or
+the read-only state of the buffer.  See also `kill-all-local-variables'.
+*/ );
+  Vchange_major_mode_hook = Qnil;
+
+  DEFVAR_BOOL ("find-file-compare-truenames", &find_file_compare_truenames /*
+If this is true, then the find-file command will check the truenames
+of all visited files when deciding whether a given file is already in
+a buffer, instead of just the buffer-file-name.  This means that if you
+attempt to visit another file which is a symbolic-link to a file which is
+already in a buffer, the existing buffer will be found instead of a newly-
+created one.  This works if any component of the pathname (including a non-
+terminal component) is a symbolic link as well, but doesn't work with hard
+links (nothing does).
+
+See also the variable find-file-use-truenames.
+*/ );
+  find_file_compare_truenames = 0;
+
+  DEFVAR_BOOL ("find-file-use-truenames", &find_file_use_truenames /*
+If this is true, then a buffer's visited file-name will always be
+chased back to the real file; it will never be a symbolic link, and there
+will never be a symbolic link anywhere in its directory path.
+That is, the buffer-file-name and buffer-file-truename will be equal.
+This doesn't work with hard links.
+
+See also the variable find-file-compare-truenames.
+*/ );
+  find_file_use_truenames = 0;
+
+  DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions /*
+List of functions to call before each text change.
+Two arguments are passed to each function: the positions of
+the beginning and end of the range of old text to be changed.
+\(For an insertion, the beginning and end are at the same place.)
+No information is given about the length of the text after the change.
+
+Buffer changes made while executing the `before-change-functions'
+don't call any before-change or after-change functions.
+*/ );
+  Vbefore_change_functions = Qnil;
+
+  /* FSF Emacs has the following additional doc at the end of
+     before-change-functions and after-change-functions:
+
+That's because these variables are temporarily set to nil.\n\
+As a result, a hook function cannot straightforwardly alter the value of\n\
+these variables.  See the Emacs Lisp manual for a way of\n\
+accomplishing an equivalent result by using other variables.
+
+     But this doesn't apply under XEmacs because things are
+     handled better. */
+
+  DEFVAR_LISP ("after-change-functions", &Vafter_change_functions /*
+List of functions to call after each text change.
+Three arguments are passed to each function: the positions of
+the beginning and end of the range of changed text,
+and the length of the pre-change text replaced by that range.
+\(For an insertion, the pre-change length is zero;
+for a deletion, that length is the number of characters deleted,
+and the post-change beginning and end are at the same place.)
+
+Buffer changes made while executing `after-change-functions'
+don't call any before-change or after-change functions.
+*/ );
+  Vafter_change_functions = Qnil;
+
+  DEFVAR_LISP ("before-change-function", &Vbefore_change_function /*
+
+*/ ); /* obsoleteness will be documented */
+  Vbefore_change_function = Qnil;
+
+  DEFVAR_LISP ("after-change-function", &Vafter_change_function /*
+
+*/ ); /* obsoleteness will be documented */
+  Vafter_change_function = Qnil;
+
+  DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook /*
+A list of functions to call before changing a buffer which is unmodified.
+The functions are run using the `run-hooks' function.
+*/ );
+  Vfirst_change_hook = Qnil;
+
+#if 0 /* FSFmacs */
+  xxDEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode /*
+*Non-nil means deactivate the mark when the buffer contents change.
+*/ );
+  Vtransient_mark_mode = Qnil;
+#endif
+
+  DEFVAR_INT ("undo-threshold", &undo_threshold /*
+Keep no more undo information once it exceeds this size.
+This threshold is applied when garbage collection happens.
+The size is counted as the number of bytes occupied,
+which includes both saved text and other data.
+*/ );
+  undo_threshold = 20000;
+
+  DEFVAR_INT ("undo-high-threshold", &undo_high_threshold /*
+Don't keep more than this much size of undo information.
+A command which pushes past this size is itself forgotten.
+This threshold is applied when garbage collection happens.
+The size is counted as the number of bytes occupied,
+which includes both saved text and other data.
+*/ );
+  undo_high_threshold = 30000;
+
+  DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only /*
+*Non-nil means disregard read-only status of buffers or characters.
+If the value is t, disregard `buffer-read-only' and all `read-only'
+text properties.  If the value is a list, disregard `buffer-read-only'
+and disregard a `read-only' extent property or text property if the
+property value is a member of the list.
+*/ );
+  Vinhibit_read_only = Qnil;
+
+  DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions /*
+List of functions called with no args to query before killing a buffer.
+*/ );
+  Vkill_buffer_query_functions = Qnil;
+
+  DEFVAR_LISP ("delete-auto-save-files", &Vdelete_auto_save_files /*
+*Non-nil means delete auto-save file when a buffer is saved or killed.
+*/ );
+  Vdelete_auto_save_files = Qt;
+}
+
+/* DOC is ignored because it is snagged and recorded externally 
+ *  by make-docfile */
+/* Renamed from DEFVAR_PER_BUFFER because FSFmacs D_P_B takes
+ *  a bogus extra arg, which confuses an otherwise identical make-docfile.c */
+/* Declaring this stuff as const produces 'Cannot reinitialize' messages
+   from SunPro C's fix-and-continue feature (a way neato feature that
+   makes debugging unbelievably more bearable) */
+#define DEFVAR_BUFFER_LOCAL(lname, field_name)				\
+ do { static CONST_IF_NOT_DEBUG struct symbol_value_forward I_hate_C	\
+       = { { { { lrecord_symbol_value_forward },			\
+               (void *) &(buffer_local_flags.field_name), 69 },		\
+             SYMVAL_CURRENT_BUFFER_FORWARD }, 0 };			\
+      defvar_buffer_local ((lname), &I_hate_C);				\
+ } while (0)
+
+#define DEFVAR_BUFFER_LOCAL_MAGIC(lname, field_name, magicfun)		\
+ do { static CONST_IF_NOT_DEBUG struct symbol_value_forward I_hate_C	\
+       = { { { { lrecord_symbol_value_forward },			\
+               (void *) &(buffer_local_flags.field_name), 69 },		\
+             SYMVAL_CURRENT_BUFFER_FORWARD }, magicfun };		\
+      defvar_buffer_local ((lname), &I_hate_C);				\
+ } while (0)
+
+#define DEFVAR_CONST_BUFFER_LOCAL(lname, field_name)			\
+ do { static CONST_IF_NOT_DEBUG struct symbol_value_forward I_hate_C	\
+       = { { { { lrecord_symbol_value_forward },			\
+               (void *) &(buffer_local_flags.field_name), 69 },		\
+             SYMVAL_CONST_CURRENT_BUFFER_FORWARD }, 0 };		\
+      defvar_buffer_local ((lname), &I_hate_C);				\
+ } while (0)
+
+#define DEFVAR_CONST_BUFFER_LOCAL_MAGIC(lname, field_name, magicfun)	\
+ do { static CONST_IF_NOT_DEBUG struct symbol_value_forward I_hate_C	\
+       = { { { { lrecord_symbol_value_forward },			\
+               (void *) &(buffer_local_flags.field_name), 69 },		\
+             SYMVAL_CONST_CURRENT_BUFFER_FORWARD }, magicfun };		\
+      defvar_buffer_local ((lname), &I_hate_C);				\
+ } while (0)
+
+static void
+defvar_buffer_local (CONST char *namestring, 
+                     CONST struct symbol_value_forward *m)
+{
+  int offset = ((char *)symbol_value_forward_forward (m)
+                - (char *)&buffer_local_flags);
+
+  defvar_mumble (namestring, m, sizeof (*m));
+
+  *((Lisp_Object *)(offset + (char *)XBUFFER (Vbuffer_local_symbols))) 
+    = intern (namestring);
+}
+
+/* DOC is ignored because it is snagged and recorded externally 
+ *  by make-docfile */
+#define DEFVAR_BUFFER_DEFAULTS(lname, field_name)			\
+ do { static CONST_IF_NOT_DEBUG struct symbol_value_forward I_hate_C	\
+       = { { { { lrecord_symbol_value_forward },			\
+               (void *) &(buffer_local_flags.field_name), 69 },		\
+             SYMVAL_DEFAULT_BUFFER_FORWARD }, 0 };			\
+      defvar_mumble ((lname), &I_hate_C, sizeof (I_hate_C));		\
+ } while (0)
+
+#define DEFVAR_BUFFER_DEFAULTS_MAGIC(lname, field_name, magicfun)	\
+ do { static CONST_IF_NOT_DEBUG struct symbol_value_forward I_hate_C	\
+       = { { { { lrecord_symbol_value_forward },			\
+               (void *) &(buffer_local_flags.field_name), 69 },		\
+             SYMVAL_DEFAULT_BUFFER_FORWARD }, magicfun };		\
+      defvar_mumble ((lname), &I_hate_C, sizeof (I_hate_C));		\
+ } while (0)
+
+static void
+nuke_all_buffer_slots (struct buffer *b, Lisp_Object zap)
+{
+  zero_lcrecord (b);
+
+#define MARKED_SLOT(x)	b->x = (zap);
+#include "bufslots.h"
+#undef MARKED_SLOT
+}
+
+void
+complex_vars_of_buffer (void)
+{
+  /* Make sure all markable slots in buffer_defaults
+     are initialized reasonably, so mark_buffer won't choke.
+   */
+  struct buffer *defs = alloc_lcrecord (sizeof (struct buffer),
+					lrecord_buffer);
+  struct buffer *syms = alloc_lcrecord (sizeof (struct buffer),
+					lrecord_buffer);
+
+  staticpro (&Vbuffer_defaults);
+  staticpro (&Vbuffer_local_symbols);
+  XSETBUFFER (Vbuffer_defaults, defs);
+  XSETBUFFER (Vbuffer_local_symbols, syms);
+  
+  nuke_all_buffer_slots (syms, Qnil);
+  nuke_all_buffer_slots (defs, Qnil);
+  defs->text = &defs->own_text;
+  syms->text = &syms->own_text;
+  
+  /* Set up the non-nil default values of various buffer slots.
+     Must do these before making the first buffer.
+     */
+  defs->major_mode = Qfundamental_mode;
+  defs->mode_name = QSFundamental;
+  defs->abbrev_table = Qnil;    /* real default setup by Lisp code */
+  defs->downcase_table = Vascii_downcase_table;
+  defs->upcase_table = Vascii_upcase_table;
+  defs->case_canon_table = Vascii_canon_table;
+  defs->case_eqv_table = Vascii_eqv_table;
+  defs->syntax_table = Vstandard_syntax_table;
+
+  defs->modeline_format = build_string ("%-");  /* reset in loaddefs.el */
+  defs->case_fold_search = Qt;
+  defs->selective_display_ellipses = Qt;
+  defs->tab_width = make_int (8);
+  defs->ctl_arrow = Qt;
+  defs->fill_column = make_int (70);
+  defs->left_margin = Qzero;
+  defs->save_length = Qzero;       /* lisp code wants int-or-nil */
+  defs->modtime = 0;
+  defs->auto_save_modified = 0;
+  defs->auto_save_failure_time = -1;
+  defs->invisibility_spec = Qt;
+  
+  {
+    /*  0 means var is always local.  Default used only at creation.
+     * -1 means var is always local.  Default used only at reset and
+     *    creation.
+     * -2 means there's no lisp variable corresponding to this slot
+     *    and the default is only used at creation.
+     * -3 means no Lisp variable.  Default used only at reset and creation.
+     * >0 is mask.  Var is local if ((buffer->local_var_flags & mask) != 0)
+     *              Otherwise default is used.
+     */
+    Lisp_Object always_local_no_default = make_int (0);
+    Lisp_Object always_local_resettable = make_int (-1);
+    Lisp_Object resettable = make_int (-3);
+    
+    /* Assign the local-flags to the slots that have default values.
+       The local flag is a bit that is used in the buffer
+       to say that it has its own local value for the slot.
+       The local flag bits are in the local_var_flags slot of the
+       buffer.  */
+    
+    nuke_all_buffer_slots (&buffer_local_flags, make_int (-2));
+    buffer_local_flags.filename = always_local_no_default;
+    buffer_local_flags.directory = always_local_no_default;
+    buffer_local_flags.backed_up = always_local_no_default;
+    buffer_local_flags.save_length = always_local_no_default;
+    buffer_local_flags.auto_save_file_name = always_local_no_default;
+    buffer_local_flags.read_only = always_local_no_default;
+    
+    buffer_local_flags.major_mode = always_local_resettable;
+    buffer_local_flags.mode_name = always_local_resettable;
+    buffer_local_flags.undo_list = always_local_no_default;
+#if 0 /* FSFmacs */
+    buffer_local_flags.mark_active = always_local_resettable;
+#endif
+    buffer_local_flags.point_before_scroll = always_local_resettable;
+    buffer_local_flags.file_truename = always_local_no_default;
+    buffer_local_flags.invisibility_spec = always_local_resettable;
+    buffer_local_flags.file_format = always_local_resettable;
+    buffer_local_flags.generated_modeline_string = always_local_no_default;
+    
+    buffer_local_flags.keymap = resettable;
+    buffer_local_flags.downcase_table = resettable;
+    buffer_local_flags.upcase_table = resettable;
+    buffer_local_flags.case_canon_table = resettable;
+    buffer_local_flags.case_eqv_table = resettable;
+    buffer_local_flags.syntax_table = resettable;
+    
+    buffer_local_flags.modeline_format = make_int (1);
+    buffer_local_flags.abbrev_mode = make_int (2);
+    buffer_local_flags.overwrite_mode = make_int (4);
+    buffer_local_flags.case_fold_search = make_int (8);
+    buffer_local_flags.auto_fill_function = make_int (0x10);
+    buffer_local_flags.selective_display = make_int (0x20);
+    buffer_local_flags.selective_display_ellipses = make_int (0x40);
+    buffer_local_flags.tab_width = make_int (0x80);
+    buffer_local_flags.truncate_lines = make_int (0x100);
+    buffer_local_flags.ctl_arrow = make_int (0x200);
+    buffer_local_flags.fill_column = make_int (0x400);
+    buffer_local_flags.left_margin = make_int (0x800);
+    buffer_local_flags.abbrev_table = make_int (0x1000);
+#ifdef REGION_CACHE_NEEDS_WORK
+    buffer_local_flags.cache_long_line_scans = make_int (0x2000);
+#endif
+    buffer_local_flags.buffer_file_type = make_int (0x4000);
+    
+    /* #### Warning, 0x4000000 (that's six zeroes) is the largest number
+       currently allowable due to the XINT() handling of this value.
+       With some rearrangement you can get 4 more bits. */
+  }
+
+  DEFVAR_BUFFER_DEFAULTS ("default-modeline-format", modeline_format /*
+Default value of `modeline-format' for buffers that don't override it.
+This is the same as (default-value 'modeline-format).
+*/ );
+
+  DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", abbrev_mode /*
+Default value of `abbrev-mode' for buffers that do not override it.
+This is the same as (default-value 'abbrev-mode).
+*/ );
+
+  DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", ctl_arrow /*
+Default value of `ctl-arrow' for buffers that do not override it.
+This is the same as (default-value 'ctl-arrow).
+*/ );
+
+#if 0 /* #### make this a specifier! */
+  DEFVAR_BUFFER_DEFAULTS ("default-display-direction", display_direction /*
+Default display-direction for buffers that do not override it.
+This is the same as (default-value 'display-direction).
+Note: This is not yet implemented.
+*/ );
+#endif
+
+  DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", truncate_lines /*
+Default value of `truncate-lines' for buffers that do not override it.
+This is the same as (default-value 'truncate-lines).
+*/ );
+
+  DEFVAR_BUFFER_DEFAULTS ("default-fill-column", fill_column /*
+Default value of `fill-column' for buffers that do not override it.
+This is the same as (default-value 'fill-column).
+*/ );
+
+  DEFVAR_BUFFER_DEFAULTS ("default-left-margin", left_margin /*
+Default value of `left-margin' for buffers that do not override it.
+This is the same as (default-value 'left-margin).
+*/ );
+
+  DEFVAR_BUFFER_DEFAULTS ("default-tab-width", tab_width /*
+Default value of `tab-width' for buffers that do not override it.
+This is the same as (default-value 'tab-width).
+*/ );
+
+  DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", case_fold_search /*
+Default value of `case-fold-search' for buffers that don't override it.
+This is the same as (default-value 'case-fold-search).
+*/ );
+
+  DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-type", buffer_file_type /*
+Default file type for buffers that do not override it.
+This is the same as (default-value 'buffer-file-type).
+The file type is nil for text, t for binary.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("modeline-format", modeline_format /*
+Template for displaying modeline for current buffer.
+Each buffer has its own value of this variable.
+Value may be a string, a symbol or a list or cons cell.
+For a symbol, its value is used (but it is ignored if t or nil).
+ A string appearing directly as the value of a symbol is processed verbatim
+ in that the %-constructs below are not recognized.
+For a glyph, it is inserted as is.
+For a list whose car is a symbol, the symbol's value is taken,
+ and if that is non-nil, the cadr of the list is processed recursively.
+ Otherwise, the caddr of the list (if there is one) is processed.
+For a list whose car is a string or list, each element is processed
+ recursively and the results are effectively concatenated.
+For a list whose car is an integer, the cdr of the list is processed
+  and padded (if the number is positive) or truncated (if negative)
+  to the width specified by that number.
+For a list whose car is an extent, the cdr of the list is processed
+ normally but the results are displayed using the face of the
+ extent, and mouse clicks over this section are processed using the
+ keymap of the extent. (In addition, if the extent has a help-echo
+ property, that string will be echoed when the mouse moves over this
+ section.) See `generated-modeline-string' for more information.
+For a list whose car is a face, the cdr of the list is processed
+ normally but the results will be displayed using the face in the car.
+For a list whose car is a keymap, the cdr of the list is processed
+ normally but the keymap will apply for mouse clicks over the results,
+ in addition to `modeline-map'.  Nested keymap specifications are
+ handled properly.
+A string is printed verbatim in the modeline except for %-constructs:
+  (%-constructs are processed when the string is the entire modeline-format
+   or when it is found in a cons-cell or a list)
+  %b -- print buffer name.      %c -- print the current column number.
+  %f -- print visited file name.
+  %* -- print %, * or hyphen.   %+ -- print *, % or hyphen.
+	% means buffer is read-only and * means it is modified.
+	For a modified read-only buffer, %* gives % and %+ gives *.
+  %s -- print process status.   %l -- print the current line number.
+  %S -- print name of selected frame (only meaningful under X Windows).
+  %p -- print percent of buffer above top of window, or Top, Bot or All.
+  %P -- print percent of buffer above bottom of window, perhaps plus Top,
+        or print Bottom or All.
+  %n -- print Narrow if appropriate.
+  %t -- Under MS-DOS, print T if files is text, B if binary.
+  %[ -- print one [ for each recursive editing level.  %] similar.
+  %% -- print %.                %- -- print infinitely many dashes.
+Decimal digits after the % specify field width to which to pad.  */ );
+
+  DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode /*
+*Major mode for new buffers.  Defaults to `fundamental-mode'.
+nil here means use current buffer's major mode.
+*/ );
+
+  DEFVAR_BUFFER_DEFAULTS ("fundamental-mode-abbrev-table", abbrev_table /*
+The abbrev table of mode-specific abbrevs for Fundamental Mode.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("major-mode", major_mode /*
+Symbol for current buffer's major mode.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("mode-name", mode_name /*
+Pretty name of current buffer's major mode (a string).
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("abbrev-mode", abbrev_mode /*
+Non-nil turns on automatic expansion of abbrevs as they are inserted.
+Automatically becomes buffer-local when set in any fashion.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("case-fold-search", case_fold_search /*
+*Non-nil if searches should ignore case.
+Automatically becomes buffer-local when set in any fashion.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("fill-column", fill_column /*
+*Column beyond which automatic line-wrapping should happen.
+Automatically becomes buffer-local when set in any fashion.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("left-margin", left_margin /*
+*Column for the default indent-line-function to indent to.
+Linefeed indents to this column in Fundamental mode.
+Automatically becomes buffer-local when set in any fashion.
+Do not confuse this with the specifier `left-margin-width';
+that controls the size of a margin that is displayed outside
+of the text area.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL_MAGIC ("tab-width", tab_width /*
+*Distance between tab stops (for display of tab characters), in columns.
+Automatically becomes buffer-local when set in any fashion.
+*/ , redisplay_variable_changed);
+
+  DEFVAR_BUFFER_LOCAL_MAGIC ("ctl-arrow", ctl_arrow /*
+*Non-nil means display control chars with uparrow.
+Nil means use backslash and octal digits.
+An integer means characters >= ctl-arrow are assumed to be printable, and
+will be displayed as a single glyph.
+Any other value is the same as 160 - the code SPC with the high bit on.
+
+The interpretation of this variable is likely to change in the future.
+
+Automatically becomes buffer-local when set in any fashion.
+This variable does not apply to characters whose display is specified
+in the current display table (if there is one).
+*/ , redisplay_variable_changed);
+
+#if 0 /* #### Make this a specifier! */
+  xxDEFVAR_BUFFER_LOCAL ("display-direction", display_direction /*
+*Non-nil means lines in the buffer are displayed right to left.
+Nil means left to right. (Not yet implemented.)
+*/ );
+#endif
+
+  DEFVAR_BUFFER_LOCAL_MAGIC ("truncate-lines", truncate_lines /*
+*Non-nil means do not display continuation lines;
+give each line of text one frame line.
+Automatically becomes buffer-local when set in any fashion.
+
+Note that this is overridden by the variable
+`truncate-partial-width-windows' if that variable is non-nil
+and this buffer is not full-frame width.
+*/ ,
+			     redisplay_variable_changed);
+
+  DEFVAR_BUFFER_LOCAL ("default-directory", directory /*
+Name of default directory of current buffer.  Should end with slash.
+Each buffer has its own value of this variable.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("buffer-file-type", buffer_file_type /*
+    "Non-nil if the visited file is a binary file.
+This variable is meaningful on MS-DOG and Windows NT.
+On those systems, it is automatically local in every buffer.
+On other systems, this variable is normally always nil.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("auto-fill-function", auto_fill_function /*
+Function called (if non-nil) to perform auto-fill.
+It is called after self-inserting a space at a column beyond `fill-column'.
+Each buffer has its own value of this variable.
+NOTE: This variable is not an ordinary hook;
+It may not be a list of functions.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("buffer-file-name", filename /*
+Name of file visited in current buffer, or nil if not visiting a file.
+Each buffer has its own value of this variable.
+*/ );
+
+#if 0 /* FSFmacs */
+/*
+Abbreviated truename of file visited in current buffer, or nil if none.
+The truename of a file is calculated by `file-truename'
+and then abbreviated with `abbreviate-file-name'.
+Each buffer has its own value of this variable.
+*/
+#endif /* FSFmacs */
+
+  DEFVAR_BUFFER_LOCAL ("buffer-file-truename", file_truename /*
+The real name of the file visited in the current buffer, 
+or nil if not visiting a file.  This is the result of passing 
+buffer-file-name to the `file-truename' function.  Every buffer has 
+its own value of this variable.  This variable is automatically 
+maintained by the functions that change the file name associated 
+with a buffer.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("buffer-auto-save-file-name", auto_save_file_name /*
+Name of file for auto-saving current buffer,
+or nil if buffer should not be auto-saved.
+Each buffer has its own value of this variable.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("buffer-read-only", read_only /*
+Non-nil if this buffer is read-only.
+Each buffer has its own value of this variable.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("buffer-backed-up", backed_up /*
+Non-nil if this buffer's file has been backed up.
+Backing up is done before the first time the file is saved.
+Each buffer has its own value of this variable.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("buffer-saved-size", save_length /*
+Length of current buffer when last read in, saved or auto-saved.
+0 initially.
+Each buffer has its own value of this variable.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL_MAGIC ("selective-display", selective_display /*
+Non-nil enables selective display:
+Integer N as value means display only lines
+ that start with less than n columns of space.
+A value of t means, after a ^M, all the rest of the line is invisible.
+ Then ^M's in the file are written into files as newlines.
+
+Automatically becomes buffer-local when set in any fashion.
+*/, redisplay_variable_changed);
+
+#ifndef old
+  DEFVAR_BUFFER_LOCAL_MAGIC ("selective-display-ellipses",
+			     selective_display_ellipses /*
+t means display ... on previous line when a line is invisible.
+Automatically becomes buffer-local when set in any fashion.
+*/, redisplay_variable_changed);
+#endif
+
+  DEFVAR_BUFFER_LOCAL ("local-abbrev-table", abbrev_table /*
+Local (mode-specific) abbrev table of current buffer.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("overwrite-mode", overwrite_mode /*
+Non-nil if self-insertion should replace existing text.
+The value should be one of `overwrite-mode-textual',
+`overwrite-mode-binary', or nil.
+If it is `overwrite-mode-textual', self-insertion still
+inserts at the end of a line, and inserts when point is before a tab,
+until the tab is filled in.
+If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.
+Automatically becomes buffer-local when set in any fashion.
+*/ );
+
+#if 0 /* FSFmacs */
+  /* Adds the following to the doc string for buffer-undo-list:
+
+An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
+was modified between BEG and END.  PROPERTY is the property name,
+and VALUE is the old value.
+*/
+#endif
+
+  DEFVAR_BUFFER_LOCAL ("buffer-undo-list", undo_list /*
+List of undo entries in current buffer.
+Recent changes come first; older changes follow newer.
+
+An entry (BEG . END) represents an insertion which begins at
+position BEG and ends at position END.
+
+An entry (TEXT . POSITION) represents the deletion of the string TEXT
+from (abs POSITION).  If POSITION is positive, point was at the front
+of the text being deleted; if negative, point was at the end.
+
+An entry (t HIGH . LOW) indicates that the buffer previously had
+\"unmodified\" status.  HIGH and LOW are the high and low 16-bit portions
+of the visited file's modification time, as of that time.  If the
+modification time of the most recent save is different, this entry is
+obsolete.
+
+An entry of the form EXTENT indicates that EXTENT was attached in
+the buffer.  Undoing an entry of this form detaches EXTENT.
+
+An entry of the form (EXTENT START END) indicates that EXTENT was
+detached from the buffer.  Undoing an entry of this form attaches
+EXTENT from START to END.
+
+An entry of the form POSITION indicates that point was at the buffer
+location given by the integer.  Undoing an entry of this form places
+point at POSITION.
+
+nil marks undo boundaries.  The undo command treats the changes
+between two undo boundaries as a single step to be undone.
+
+If the value of the variable is t, undo information is not recorded.
+*/ );
+
+#if 0 /* FSFmacs */
+  xxDEFVAR_BUFFER_LOCAL ("mark-active", mark_active /*
+Non-nil means the mark and region are currently active in this buffer.
+Automatically local in all buffers.
+*/ );
+#endif
+
+#ifdef REGION_CACHE_NEEDS_WORK
+  xxDEFVAR_BUFFER_LOCAL ("cache-long-line-scans", cache_long_line_scans /*
+Non-nil means that Emacs should use caches to handle long lines more quickly.
+This variable is buffer-local, in all buffers.
+
+Normally, the line-motion functions work by scanning the buffer for
+newlines.  Columnar operations (like move-to-column and
+compute-motion) also work by scanning the buffer, summing character
+widths as they go.  This works well for ordinary text, but if the
+buffer's lines are very long (say, more than 500 characters), these
+motion functions will take longer to execute.  Emacs may also take
+longer to update the display.
+
+If cache-long-line-scans is non-nil, these motion functions cache the
+results of their scans, and consult the cache to avoid rescanning
+regions of the buffer until the text is modified.  The caches are most
+beneficial when they prevent the most searching---that is, when the
+buffer contains long lines and large regions of characters with the
+same, fixed screen width.
+
+When cache-long-line-scans is non-nil, processing short lines will
+become slightly slower (because of the overhead of consulting the
+cache), and the caches will use memory roughly proportional to the
+number of newlines and characters whose screen width varies.
+
+The caches require no explicit maintenance; their accuracy is
+maintained internally by the Emacs primitives.  Enabling or disabling
+the cache should not affect the behavior of any of the motion
+functions; it should only affect their performance.
+*/ );
+#endif /* REGION_CACHE_NEEDS_WORK */
+
+  DEFVAR_BUFFER_LOCAL ("point-before-scroll", point_before_scroll /*
+Value of point before the last series of scroll operations, or nil.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL ("buffer-file-format", file_format /*
+List of formats to use when saving this buffer.
+Formats are defined by `format-alist'.  This variable is
+set when a file is visited.  Automatically local in all buffers.
+*/ );
+
+  DEFVAR_BUFFER_LOCAL_MAGIC ("buffer-invisibility-spec", invisibility_spec /*
+Invisibility spec of this buffer.
+The default is t, which means that text is invisible
+if it has (or is covered by an extent with) a non-nil `invisible' property.
+If the value is a list, a text character is invisible if its `invisible'
+property is an element in that list.
+If an element is a cons cell of the form (PROP . ELLIPSIS),
+then characters with property value PROP are invisible,
+and they have an ellipsis as well if ELLIPSIS is non-nil.
+Note that the actual characters used for the ellipsis are controllable
+using `invisible-text-glyph', and default to \"...\".
+*/, redisplay_variable_changed);
+
+  DEFVAR_CONST_BUFFER_LOCAL ("generated-modeline-string",
+			     generated_modeline_string /*
+String of characters in this buffer's modeline as of the last redisplay.
+Each time the modeline is recomputed, the resulting characters are
+stored in this string, which is resized as necessary.  You may not
+set this variable, and modifying this string will not change the
+modeline; you have to change `modeline-format' if you want that.
+
+For each extent in `modeline-format' that is encountered when
+processing the modeline, a corresponding extent is placed in
+`generated-modeline-string' and covers the text over which the
+extent in `modeline-format' applies.  The extent in
+`generated-modeline-string' is made a child of the extent in
+`modeline-format', which means that it inherits all properties from
+that extent.  Note that the extents in `generated-modeline-string'
+are managed automatically.  You should not explicitly put any extents
+in `generated-modeline-string'; if you do, they will disappear the
+next time the modeline is processed.
+
+For extents in `modeline-format', the following properties are currently
+handled:
+
+`face'
+	Affects the face of the modeline text.  Currently, faces do
+	not merge properly; only the most recently encountered face
+	is used.  This is a bug.
+
+`keymap'
+	Affects the disposition of button events over the modeline
+	text.  Multiple applicable keymaps *are* handled properly,
+	and `modeline-map' still applies to any events that don't
+	have bindings in extent-specific keymaps.
+
+`help-echo'
+	If a string, causes the string to be displayed when the mouse
+	moves over the text.
+*/ );
+
+  /* Check for DEFVAR_BUFFER_LOCAL without initializing the corresponding
+     slot of buffer_local_flags and vice-versa.  Must be done after all
+     DEFVAR_BUFFER_LOCAL() calls. */
+#define MARKED_SLOT(slot)					\
+  if ((XINT (buffer_local_flags.slot) != -2 &&			\
+         XINT (buffer_local_flags.slot) != -3)			\
+      != !(NILP (XBUFFER (Vbuffer_local_symbols)->slot)))	\
+  abort ()
+#include "bufslots.h"
+#undef MARKED_SLOT
+
+  Vprin1_to_string_buffer
+    = Fget_buffer_create (Fpurecopy (build_string (" prin1")));
+  /* Reset Vbuffer_alist again so that the above buf is magically
+     invisible */
+  Vbuffer_alist = Qnil;
+  /* Want no undo records for prin1_to_string_buffer */
+  Fbuffer_disable_undo (Vprin1_to_string_buffer);
+  
+  {
+    Lisp_Object scratch =
+      Fset_buffer (Fget_buffer_create (QSscratch));
+    /* Want no undo records for *scratch* until after Emacs is dumped */
+    Fbuffer_disable_undo (scratch);
+  }
+}
+
+void
+init_buffer (void)
+{
+  /* This function can GC */
+  char buf[MAXPATHLEN+1];
+  char *pwd;
+  struct stat dotstat, pwdstat;
+  int rc;
+
+  buf[0] = 0;
+
+  Fset_buffer (Fget_buffer_create (QSscratch));
+
+  /* If PWD is accurate, use it instead of calling getwd.  This is faster
+     when PWD is right, and may avoid a fatal error.  */
+  if ((pwd = getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd)
+      && stat (pwd, &pwdstat) == 0
+      && stat (".", &dotstat) == 0
+      && dotstat.st_ino == pwdstat.st_ino
+      && dotstat.st_dev == pwdstat.st_dev
+      && (int) strlen (pwd) < MAXPATHLEN)
+    strcpy (buf, pwd);
+  else if (getwd (buf) == 0)
+    fatal ("`getwd' failed: %s\n", buf);
+
+#ifndef VMS
+  /* Maybe this should really use some standard subroutine
+     whose definition is filename syntax dependent.  */
+  rc = strlen (buf);
+  if (!(IS_DIRECTORY_SEP (buf[rc - 1])))
+    {
+      buf[rc] = DIRECTORY_SEP;
+      buf[rc + 1] = '\0';
+    }
+#endif /* not VMS */
+  current_buffer->directory = build_string (buf);
+
+#if 0 /* FSFmacs */
+  /* #### is this correct? */
+  temp = get_minibuffer (0);
+  XBUFFER (temp)->directory = current_buffer->directory;
+#endif
+}