Initial revision

1 files changed, 1605 insertions, 0 deletions

diff --git a/src/buffer.c b/src/buffer.c
new file mode 100644
index 00000000000..f81dca8388d
--- /dev/null
+++ b/src/buffer.c
@@ -0,0 +1,1605 @@
+/* Buffer manipulation primitives for GNU Emacs.
+   Copyright (C) 1985, 1986, 1987, 1988, 1989 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+#include <sys/param.h>
+
+#ifndef MAXPATHLEN
+/* in 4.1, param.h fails to define this. */
+#define MAXPATHLEN 1024
+#endif /* not MAXPATHLEN */
+
+#ifdef NULL
+#undef NULL
+#endif
+#include "config.h"
+#include "lisp.h"
+#include "window.h"
+#include "commands.h"
+#include "buffer.h"
+#include "syntax.h"
+#include "indent.h"
+
+struct buffer *current_buffer;          /* the current buffer */
+
+/* First buffer in chain of all buffers (in reverse order of creation).
+   Threaded through ->next.  */
+
+struct buffer *all_buffers;
+
+/* This structure holds the default values of the buffer-local variables
+   defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
+   The default value occupies the same slot in this structure
+   as an individual buffer's value occupies in that buffer.
+   Setting the default value also goes through the alist of buffers
+   and stores into each buffer that does not say it has a local value.  */
+
+struct buffer buffer_defaults;
+
+/* A Lisp_Object pointer to the above, used for staticpro */
+
+static Lisp_Object Vbuffer_defaults;
+
+/* This structure marks which slots in a buffer have corresponding
+   default values in buffer_defaults.
+   Each such slot has a nonzero value in this structure.
+   The value has only one nonzero bit.
+
+   When a buffer has its own local value for a slot,
+   the bit for that slot (found in the same slot in this structure)
+   is turned on in the buffer's local_var_flags slot.
+
+   If a slot in this structure is -1, then even though there may
+   be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
+   and the corresponding slot in buffer_defaults is not used.
+
+   If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
+   but there is a default value which is copied into each buffer.
+
+   If a slot in this structure is negative, then even though there may
+   be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
+   and the corresponding slot in buffer_defaults is not used.
+
+   If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
+   zero, that is a bug */
+
+struct buffer buffer_local_flags;
+
+/* This structure holds the names of symbols whose values may be
+   buffer-local.  It is indexed and accessed in the same way as the above. */
+
+struct buffer buffer_local_symbols;
+/* A Lisp_Object pointer to the above, used for staticpro */
+static Lisp_Object Vbuffer_local_symbols;
+
+/* Nonzero means don't allow modification of protected fields.  */
+
+int check_protected_fields;
+
+Lisp_Object Fset_buffer ();
+
+/* Alist of all buffer names vs the buffers. */
+/* This used to be a variable, but is no longer,
+ to prevent lossage due to user rplac'ing this alist or its elements.  */
+Lisp_Object Vbuffer_alist;
+
+/* Functions to call before and after each text change. */
+Lisp_Object Vbefore_change_function;
+Lisp_Object Vafter_change_function;
+
+/* Function to call before changing an unmodified buffer.  */
+Lisp_Object Vfirst_change_function;
+
+Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local;
+
+Lisp_Object Qprotected_field;
+
+Lisp_Object QSFundamental;      /* A string "Fundamental" */
+
+Lisp_Object Qkill_buffer_hook;
+
+/* For debugging; temporary.  See set_buffer_internal.  */
+/* Lisp_Object Qlisp_mode, Vcheck_symbol; */
+
+nsberror (spec)
+     Lisp_Object spec;
+{
+  if (XTYPE (spec) == Lisp_String)
+    error ("No buffer named %s", XSTRING (spec)->data);
+  error ("Invalid buffer argument");
+}
+
+DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 0, 0,
+  "Return a list of all existing live buffers.")
+  ()
+{
+  return Fmapcar (Qcdr, Vbuffer_alist);
+}
+
+DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0,
+  "Return the buffer named NAME (a string).\n\
+If there is no live buffer named NAME, return nil.\n\
+NAME may also be a buffer; if so, the value is that buffer.")
+  (name)
+     register Lisp_Object name;
+{
+  if (XTYPE (name) == Lisp_Buffer)
+    return name;
+  CHECK_STRING (name, 0);
+
+  return Fcdr (Fassoc (name, Vbuffer_alist));
+}
+
+DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0,
+  "Return the buffer visiting file FILENAME (a string).\n\
+If there is no such live buffer, return nil.")
+  (filename)
+     register Lisp_Object filename;
+{
+  register Lisp_Object tail, buf, tem;
+  CHECK_STRING (filename, 0);
+  filename = Fexpand_file_name (filename, Qnil);
+
+  for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr)
+    {
+      buf = Fcdr (XCONS (tail)->car);
+      if (XTYPE (buf) != Lisp_Buffer) continue;
+      if (XTYPE (XBUFFER (buf)->filename) != Lisp_String) continue;
+      tem = Fstring_equal (XBUFFER (buf)->filename, filename);
+      if (!NULL (tem))
+        return buf;
+    }
+  return Qnil;
+}
+
+/* Incremented for each buffer created, to assign the buffer number. */
+int buffer_count;
+
+DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0,
+  "Return the buffer named NAME, or create such a buffer and return it.\n\
+A new buffer is created if there is no live buffer named NAME.\n\
+If NAME is a buffer instead of a string, then it is the value returned.\n\
+The value is never nil.")  
+  (name)
+     register Lisp_Object name;
+{
+  register Lisp_Object buf, function, tem;
+  int count = specpdl_ptr - specpdl;
+  register struct buffer *b;
+
+  buf = Fget_buffer (name);
+  if (!NULL (buf))
+    return buf;
+
+  b = (struct buffer *) malloc (sizeof (struct buffer));
+  if (!b)
+    memory_full ();
+
+  BUF_GAP_SIZE (b) = 20;
+  BUFFER_ALLOC (BUF_BEG_ADDR (b), BUF_GAP_SIZE (b));
+  if (! BUF_BEG_ADDR (b))
+    memory_full ();
+
+  BUF_PT (b) = 1;
+  BUF_GPT (b) = 1;
+  BUF_BEGV (b) = 1;
+  BUF_ZV (b) = 1;
+  BUF_Z (b) = 1;
+  BUF_MODIFF (b) = 1;
+
+  /* Put this on the chain of all buffers including killed ones.  */
+  b->next = all_buffers;
+  all_buffers = b;
+
+  b->mark = Fmake_marker ();
+  /*b->number = make_number (++buffer_count);*/
+  b->name = name;
+  if (XSTRING (name)->data[0] != ' ')
+    b->undo_list = Qnil;
+  else
+    b->undo_list = Qt;
+
+  reset_buffer (b);
+
+  /* Put this in the alist of all live buffers.  */
+  XSET (buf, Lisp_Buffer, b);
+  Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil));
+
+  b->mark = Fmake_marker ();
+  b->markers = Qnil;
+  b->name = name;
+
+  function = buffer_defaults.major_mode;
+  if (NULL (function))
+    {
+      tem = Fget (current_buffer->major_mode, Qmode_class);
+      if (EQ (tem, Qnil))
+        function = current_buffer->major_mode;
+    }
+
+  if (NULL (function) || EQ (function, Qfundamental_mode))
+    return buf;
+
+  /* To select a nonfundamental mode,
+     select the buffer temporarily and then call the mode function. */
+
+  record_unwind_protect (save_excursion_restore, save_excursion_save ());
+
+  Fset_buffer (buf);
+  call0 (function);
+
+  return unbind_to (count, buf);
+}
+
+/* Reinitialize everything about a buffer except its name and contents.  */
+
+void
+reset_buffer (b)
+     register struct buffer *b;
+{
+  b->filename = Qnil;
+  b->directory = (current_buffer) ? current_buffer->directory : Qnil;
+  b->modtime = 0;
+  b->save_modified = 1;
+  b->save_length = 0;
+  b->last_window_start = 1;
+  b->backed_up = Qnil;
+  b->auto_save_modified = 0;
+  b->auto_save_file_name = Qnil;
+  b->read_only = Qnil;
+  b->fieldlist = Qnil;
+  reset_buffer_local_variables(b);
+}
+
+reset_buffer_local_variables(b)
+     register struct buffer *b;
+{
+  register int offset;
+
+  /* Reset the major mode to Fundamental, together with all the
+     things that depend on the major mode.
+     default-major-mode is handled at a higher level.
+     We ignore it here.  */
+  b->major_mode = Qfundamental_mode;
+  b->keymap = Qnil;
+  b->abbrev_table = Vfundamental_mode_abbrev_table;
+  b->mode_name = QSFundamental;
+  b->minor_modes = Qnil;
+  b->downcase_table = Vascii_downcase_table;
+  b->upcase_table = Vascii_upcase_table;
+  b->case_canon_table = Vascii_downcase_table;
+  b->case_eqv_table = Vascii_upcase_table;
+#if 0
+  b->sort_table = XSTRING (Vascii_sort_table);
+  b->folding_sort_table = XSTRING (Vascii_folding_sort_table);
+#endif /* 0 */
+
+  /* Reset all per-buffer variables to their defaults.  */
+  b->local_var_alist = Qnil;
+  b->local_var_flags = 0;
+
+  /* For each slot that has a default value,
+     copy that into the slot.  */
+
+  for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags;
+       offset < sizeof (struct buffer);
+       offset += sizeof (Lisp_Object)) /* sizeof int == sizeof Lisp_Object */
+    if (*(int *)(offset + (char *) &buffer_local_flags) > 0
+        || *(int *)(offset + (char *) &buffer_local_flags) == -2)
+      *(Lisp_Object *)(offset + (char *)b) =
+        *(Lisp_Object *)(offset + (char *)&buffer_defaults);
+}
+
+DEFUN ("generate-new-buffer", Fgenerate_new_buffer, Sgenerate_new_buffer,
+  1, 1, 0,
+  "Create and return a buffer with a name based on NAME.\n\
+If there is no live buffer named NAME, then one is created.\n\
+Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
+until an unused name is found, and then create a buffer.")
+ (name)
+     register Lisp_Object name;
+{
+  register Lisp_Object gentemp, tem;
+  int count;
+  char number[10];
+
+  CHECK_STRING (name, 0);
+
+  tem = Fget_buffer (name);
+  if (NULL (tem))
+    return Fget_buffer_create (name);
+
+  count = 1;
+  while (1)
+    {
+      sprintf (number, "<%d>", ++count);
+      gentemp = concat2 (name, build_string (number));
+      tem = Fget_buffer (gentemp);
+      if (NULL (tem))
+        return Fget_buffer_create (gentemp);
+    }
+}
+
+
+DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0,
+  "Return the name of BUFFER, as a string.\n\
+Wyth no argument or nil as argument, return the name of the current buffer.")
+  (buffer)
+     register Lisp_Object buffer;
+{
+  if (NULL (buffer))
+    return current_buffer->name;
+  CHECK_BUFFER (buffer, 0);
+  return XBUFFER (buffer)->name;
+}
+
+DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0,
+  "Return name of file BUFFER is visiting, or nil if none.\n\
+No argument or nil as argument means use the current buffer.")
+  (buffer)
+     register Lisp_Object buffer;
+{
+  if (NULL (buffer))
+    return current_buffer->filename;
+  CHECK_BUFFER (buffer, 0);
+  return XBUFFER (buffer)->filename;
+}
+
+DEFUN ("buffer-local-variables", Fbuffer_local_variables,
+  Sbuffer_local_variables, 0, 1, 0,
+  "Return an alist of variables that are buffer-local in BUFFER.\n\
+Each element looks like (SYMBOL . VALUE) and describes one variable.\n\
+Note that storing new VALUEs in these elements doesn't change the variables.\n\
+No argument or nil as argument means use current buffer as BUFFER.")
+  (buffer)
+     register Lisp_Object buffer;
+{
+  register struct buffer *buf;
+  register Lisp_Object val;
+
+  if (NULL (buffer))
+    buf = current_buffer;
+  else
+    {
+      CHECK_BUFFER (buffer, 0);
+      buf = XBUFFER (buffer);
+    }
+
+  {
+    /* Reference each variable in the alist in our current buffer.
+       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.  */
+    register Lisp_Object tem;
+    for (tem = buf->local_var_alist; CONSP (tem); tem = XCONS (tem)->cdr)
+      {
+        Lisp_Object v1 = Fsymbol_value (XCONS (XCONS (tem)->car)->car);
+        if (buf == current_buffer)
+          XCONS (XCONS (tem)->car)->cdr = v1;
+      }
+  }
+
+  /* Make a copy of the alist, to return it.  */
+  val = Fcopy_alist (buf->local_var_alist);
+
+  /* Add on all the variables stored in special slots.  */
+  {
+    register int offset, mask;
+
+    for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols;
+         offset < sizeof (struct buffer);
+         offset += (sizeof (int))) /* sizeof int == sizeof Lisp_Object */
+      {
+        mask = *(int *)(offset + (char *) &buffer_local_flags);
+        if (mask == -1 || (buf->local_var_flags & mask))
+          if (XTYPE (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols))
+              == Lisp_Symbol)
+            val = Fcons (Fcons (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols),
+                                *(Lisp_Object *)(offset + (char *)buf)),
+                         val);
+      }
+  }
+  return (val);
+}
+
+
+DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p,
+  0, 1, 0,
+  "Return t if BUFFER was modified since its file was last read or saved.\n\
+No argument or nil as argument means use current buffer as BUFFER.")
+  (buffer)
+     register Lisp_Object buffer;
+{
+  register struct buffer *buf;
+  if (NULL (buffer))
+    buf = current_buffer;
+  else
+    {
+      CHECK_BUFFER (buffer, 0);
+      buf = XBUFFER (buffer);
+    }
+
+  return buf->save_modified < BUF_MODIFF (buf) ? Qt : Qnil;
+}
+
+DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p,
+  1, 1, 0,
+  "Mark current buffer as modified or unmodified according to FLAG.\n\
+A non-nil FLAG means mark the buffer modified.")
+  (flag)
+     register Lisp_Object flag;
+{
+  register int already;
+  register Lisp_Object fn;
+
+#ifdef CLASH_DETECTION
+  /* If buffer becoming modified, lock the file.
+     If buffer becoming unmodified, unlock the file.  */
+
+  fn = current_buffer->filename;
+  if (!NULL (fn))
+    {
+      already = current_buffer->save_modified < MODIFF;
+      if (!already && !NULL (flag))
+        lock_file (fn);
+      else if (already && NULL (flag))
+        unlock_file (fn);
+    }
+#endif /* CLASH_DETECTION */
+
+  current_buffer->save_modified = NULL (flag) ? MODIFF : 0;
+  update_mode_lines++;
+  return flag;
+}
+
+DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick,
+  0, 1, 0,
+  "Return BUFFER's tick counter, incremented for each change in text.\n\
+Each buffer has a tick counter which is incremented each time the text in\n\
+that buffer is changed.  It wraps around occasionally.\n\
+No argument or nil as argument means use current buffer as BUFFER.")
+  (buffer)
+     register Lisp_Object buffer;
+{
+  register struct buffer *buf;
+  if (NULL (buffer))
+    buf = current_buffer;
+  else
+    {
+      CHECK_BUFFER (buffer, 0);
+      buf = XBUFFER (buffer);
+    }
+
+  return make_number (BUF_MODIFF (buf));
+}
+
+DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 1,
+       "sRename buffer (to new name): ",
+  "Change current buffer's name to NEWNAME (a string).\n\
+It is an error if a buffer named NEWNAME already exists.\n\
+This does not change the name of the visited file (if any).")
+  (name)
+     register Lisp_Object name;
+{
+  register Lisp_Object tem, buf;
+
+  CHECK_STRING (name, 0);
+  tem = Fget_buffer (name);
+  if (!NULL (tem))
+    error ("Buffer name \"%s\" is in use", XSTRING (name)->data);
+
+  current_buffer->name = name;
+  XSET (buf, Lisp_Buffer, current_buffer);
+  Fsetcar (Frassq (buf, Vbuffer_alist), name);
+  if (NULL (current_buffer->filename) && !NULL (current_buffer->auto_save_file_name))
+    call0 (intern ("rename-auto-save-file"));
+  return Qnil;
+}
+
+DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 1, 0,
+  "Return most recently selected buffer other than BUFFER.\n\
+Buffers not visible in windows are preferred to visible buffers.\n\
+If no other buffer exists, the buffer `*scratch*' is returned.\n\
+If BUFFER is omitted or nil, some interesting buffer is returned.")
+  (buffer)
+     register Lisp_Object buffer;
+{
+  register Lisp_Object tail, buf, notsogood, tem;
+  notsogood = Qnil;
+
+  for (tail = Vbuffer_alist; !NULL (tail); tail = Fcdr (tail))
+    {
+      buf = Fcdr (Fcar (tail));
+      if (EQ (buf, buffer))
+        continue;
+      if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ')
+        continue;
+      tem = Fget_buffer_window (buf, Qnil);
+      if (NULL (tem))
+        return buf;
+      if (NULL (notsogood))
+        notsogood = buf;
+    }
+  if (!NULL (notsogood))
+    return notsogood;
+  return Fget_buffer_create (build_string ("*scratch*"));
+}
+
+DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 1,1,
+0,
+  "Make BUFFER stop keeping undo information.")
+  (buf)
+     register Lisp_Object buf;
+{
+  CHECK_BUFFER (buf, 0);
+  XBUFFER (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.\n\
+No argument or nil as argument means do this for the current buffer.")
+  (buf)
+     register Lisp_Object buf;
+{
+  register struct buffer *b;
+  register Lisp_Object buf1;
+
+  if (NULL (buf))
+    b = current_buffer;
+  else
+    {
+      buf1 = Fget_buffer (buf);
+      if (NULL (buf1)) nsberror (buf);
+      b = XBUFFER (buf1);
+    }
+
+  if (EQ (b->undo_list, Qt))
+    b->undo_list = Qnil;
+
+  return Qnil;
+}
+
+/*
+  DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
+Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
+The buffer being killed will be current while the hook is running.\n\
+See `kill-buffer'."
+ */
+DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ",
+  "Kill the buffer BUFFER.\n\
+The argument may be a buffer or may be the name of a buffer.\n\
+An argument of nil means kill the current buffer.\n\n\
+Value is t if the buffer is actually killed, nil if user says no.\n\n\
+The value of `kill-buffer-hook' (which may be local to that buffer),\n\
+if not void, is a list of functions to be called, with no arguments,\n\
+before the buffer is actually killed.  The buffer to be killed is current\n\
+when the hook functions are called.\n\n\
+Any processes that have this buffer as the `process-buffer' are killed\n\
+with `delete-process'.")
+  (bufname)
+     Lisp_Object bufname;
+{
+  Lisp_Object buf;
+  register struct buffer *b;
+  register Lisp_Object tem;
+  register struct Lisp_Marker *m;
+  struct gcpro gcpro1, gcpro2;
+
+  if (NULL (bufname))
+    buf = Fcurrent_buffer ();
+  else
+    buf = Fget_buffer (bufname);
+  if (NULL (buf))
+    nsberror (bufname);
+
+  b = XBUFFER (buf);
+
+  /* Query if the buffer is still modified.  */
+  if (INTERACTIVE && !NULL (b->filename)
+      && BUF_MODIFF (b) > b->save_modified)
+    {
+      GCPRO2 (buf, bufname);
+      tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
+                                     XSTRING (b->name)->data));
+      UNGCPRO;
+      if (NULL (tem))
+        return Qnil;
+    }
+
+  /* Run kill-buffer hook with the buffer to be killed the current buffer.  */
+  {
+    register Lisp_Object val;
+    int count = specpdl_ptr - specpdl;
+
+    record_unwind_protect (save_excursion_restore, save_excursion_save ());
+    set_buffer_internal (b);
+    call1 (Vrun_hooks, Qkill_buffer_hook);
+    unbind_to (count, Qnil);
+  }
+
+  /* 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 do_yes_or_no_p.  */
+
+  /* Don't kill the minibuffer now current.  */
+  if (EQ (buf, XWINDOW (minibuf_window)->buffer))
+    return Qnil;
+
+  if (NULL (b->name))
+    return Qnil;
+
+  /* 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)
+    {
+      tem = Fother_buffer (buf);
+      Fset_buffer (tem);
+      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 */
+
+#ifdef subprocesses
+  kill_buffer_processes (buf);
+#endif /* subprocesses */
+
+  tem = Vinhibit_quit;
+  Vinhibit_quit = Qt;
+  Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist);
+  Freplace_buffer_in_windows (buf);
+  Vinhibit_quit = tem;
+
+  /* Delete any auto-save file.  */
+  if (XTYPE (b->auto_save_file_name) == Lisp_String)
+    {
+      Lisp_Object tem;
+      tem = Fsymbol_value (intern ("delete-auto-save-files"));
+      if (! NULL (tem))
+        unlink (XSTRING (b->auto_save_file_name)->data);
+    }
+
+  /* Unchain all markers of this buffer
+     and leave them pointing nowhere.  */
+  for (tem = b->markers; !EQ (tem, Qnil); )
+    {
+      m = XMARKER (tem);
+      m->buffer = 0;
+      tem = m->chain;
+      m->chain = Qnil;
+    }
+  b->markers = Qnil;
+
+  b->name = Qnil;
+  BUFFER_FREE (BUF_BEG_ADDR (b));
+  b->undo_list = Qnil;
+
+  return Qt;
+}
+
+/* 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.  */
+
+record_buffer (buf)
+     Lisp_Object buf;
+{
+  register Lisp_Object link, prev;
+
+  prev = Qnil;
+  for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr)
+    {
+      if (EQ (XCONS (XCONS (link)->car)->cdr, buf))
+        break;
+      prev = link;
+    }
+
+  /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist)
+     but cannot use Fdelq here it that allows quitting.  */
+
+  if (NULL (prev))
+    Vbuffer_alist = XCONS (Vbuffer_alist)->cdr;
+  else
+    XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr;
+        
+  XCONS(link)->cdr = Vbuffer_alist;
+  Vbuffer_alist = link;
+}
+
+DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ",
+  "Select buffer BUFFER in the current window.\n\
+BUFFER may be a buffer or a buffer name.\n\
+Optional second arg NORECORD non-nil means\n\
+do not put this buffer at the front of the list of recently selected ones.\n\
+\n\
+WARNING: This is NOT the way to work on another buffer temporarily\n\
+within a Lisp program!  Use `set-buffer' instead.  That avoids messing with\n\
+the window-buffer correspondences.")
+  (bufname, norecord)
+     Lisp_Object bufname, norecord;
+{
+  register Lisp_Object buf;
+  Lisp_Object tem;
+
+  if (EQ (minibuf_window, selected_window))
+    error ("Cannot switch buffers in minibuffer window");
+  tem = Fwindow_dedicated_p (selected_window);
+  if (!NULL (tem))
+    error ("Cannot switch buffers in a dedicated window");
+
+  if (NULL (bufname))
+    buf = Fother_buffer (Fcurrent_buffer ());
+  else
+    buf = Fget_buffer_create (bufname);
+  Fset_buffer (buf);
+  if (NULL (norecord))
+    record_buffer (buf);
+
+  Fset_window_buffer (EQ (selected_window, minibuf_window)
+                      ? Fnext_window (minibuf_window, Qnil) : selected_window,
+                      buf);
+
+  return Qnil;
+}
+
+DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0,
+  "Select buffer BUFFER in some window, preferably a different one.\n\
+If BUFFER is nil, then some other buffer is chosen.\n\
+If `pop-up-windows' is non-nil, windows can be split to do this.\n\
+If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
+window even if BUFFER is already visible in the selected window.")
+  (bufname, other)
+     Lisp_Object bufname, other;
+{
+  register Lisp_Object buf;
+  if (NULL (bufname))
+    buf = Fother_buffer (Fcurrent_buffer ());
+  else
+    buf = Fget_buffer_create (bufname);
+  Fset_buffer (buf);
+  record_buffer (buf);
+  Fselect_window (Fdisplay_buffer (buf, other));
+  return Qnil;
+}
+
+DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0,
+  "Return the current buffer as a Lisp object.")
+  ()
+{
+  register Lisp_Object buf;
+  XSET (buf, Lisp_Buffer, current_buffer);
+  return buf;
+}
+
+/* Set the current buffer to b */
+
+void
+set_buffer_internal (b)
+     register struct buffer *b;
+{
+  register struct buffer *old_buf;
+  register Lisp_Object tail, valcontents;
+  enum Lisp_Type tem;
+
+  if (current_buffer == b)
+    return;
+
+  windows_or_buffers_changed = 1;
+  old_buf = current_buffer;
+  current_buffer = b;
+  last_known_column_point = -1;   /* invalidate indentation cache */
+
+  /* Look down buffer's list of local Lisp variables
+     to find and update any that forward into C variables. */
+
+  for (tail = b->local_var_alist; !NULL (tail); tail = XCONS (tail)->cdr)
+    {
+      valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value;
+      if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value
+           || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value)
+          && (tem = XTYPE (XCONS (valcontents)->car),
+              (tem == Lisp_Boolfwd || tem == Lisp_Intfwd
+               || tem == Lisp_Objfwd)))
+        /* Just reference the variable
+             to cause it to become set for this buffer.  */
+        Fsymbol_value (XCONS (XCONS (tail)->car)->car);
+    }
+
+  /* Do the same with any others that were local to the previous buffer */
+
+  if (old_buf)
+    for (tail = old_buf->local_var_alist; !NULL (tail); tail = XCONS (tail)->cdr)
+      {
+        valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value;
+        if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value
+             || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value)
+            && (tem = XTYPE (XCONS (valcontents)->car),
+                (tem == Lisp_Boolfwd || tem == Lisp_Intfwd
+                 || tem == Lisp_Objfwd)))
+          /* Just reference the variable
+               to cause it to become set for this buffer.  */
+          Fsymbol_value (XCONS (XCONS (tail)->car)->car);
+      }
+}
+
+DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0,
+  "Make the buffer BUFFER current for editing operations.\n\
+BUFFER may be a buffer or the name of an existing buffer.\n\
+See also `save-excursion' when you want to make a buffer current temporarily.\n\
+This function does not display the buffer, so its effect ends\n\
+when the current command terminates.\n\
+Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
+  (bufname)
+     register Lisp_Object bufname;
+{
+  register Lisp_Object buffer;
+  buffer = Fget_buffer (bufname);
+  if (NULL (buffer))
+    nsberror (bufname);
+  if (NULL (XBUFFER (buffer)->name))
+    error ("Selecting deleted 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, 0, 0,
+  "Signal a `buffer-read-only' error if the current buffer is read-only.")
+  ()
+{
+  while (!NULL (current_buffer->read_only))
+    Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil)));
+  return Qnil;
+}
+
+DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "",
+  "Put BUFFER at the end of the list of all buffers.\n\
+There it is the least likely candidate for `other-buffer' to return;\n\
+thus, the least likely buffer for \\[switch-to-buffer] to select by default.")
+  (buf)
+     register Lisp_Object buf;
+{
+  register Lisp_Object aelt, link;
+
+  if (NULL (buf))
+    {
+      XSET (buf, Lisp_Buffer, current_buffer);
+      Fswitch_to_buffer (Fother_buffer (buf), Qnil);
+    }
+  else
+    {
+      Lisp_Object buf1;
+      
+      buf1 = Fget_buffer (buf);
+      if (NULL (buf1))
+        nsberror (buf);
+      buf = buf1;
+    }     
+
+  aelt = Frassq (buf, Vbuffer_alist);
+  link = Fmemq (aelt, Vbuffer_alist);
+  Vbuffer_alist = Fdelq (aelt, Vbuffer_alist);
+  XCONS (link)->cdr = Qnil;
+  Vbuffer_alist = nconc2 (Vbuffer_alist, link);
+  return Qnil;
+}
+
+DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, 0,
+  "Delete the entire contents of the current buffer.\n\
+Any clipping restriction in effect (see `narrow-to-buffer') is removed,\n\
+so the buffer is truly empty after this.")
+  ()
+{
+  Fwiden ();
+  del_range (BEG, Z);
+  current_buffer->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.  */
+  XFASTINT (current_buffer->save_length) = 0;
+  return Qnil;
+}
+
+validate_region (b, e)
+     register Lisp_Object *b, *e;
+{
+  register int i;
+
+  CHECK_NUMBER_COERCE_MARKER (*b, 0);
+  CHECK_NUMBER_COERCE_MARKER (*e, 1);
+
+  if (XINT (*b) > XINT (*e))
+    {
+      i = XFASTINT (*b);        /* This is legit even if *b is < 0 */
+      *b = *e;
+      XFASTINT (*e) = i;        /* because this is all we do with i.  */
+    }
+
+  if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e)
+        && XINT (*e) <= ZV))
+    args_out_of_range (*b, *e);
+}
+
+Lisp_Object
+list_buffers_1 (files)
+     Lisp_Object files;
+{
+  register Lisp_Object tail, tem, buf;
+  Lisp_Object col1, col2, col3, minspace;
+  register struct buffer *old = current_buffer, *b;
+  int desired_point = 0;
+  Lisp_Object other_file_symbol;
+
+  other_file_symbol = intern ("list-buffers-directory");
+
+  XFASTINT (col1) = 19;
+  XFASTINT (col2) = 25;
+  XFASTINT (col3) = 40;
+  XFASTINT (minspace) = 1;
+
+  Fset_buffer (Vstandard_output);
+
+  tail = intern ("Buffer-menu-mode");
+  if (!EQ (tail, current_buffer->major_mode)
+      && (tem = Ffboundp (tail), !NULL (tem)))
+    call0 (tail);
+  Fbuffer_disable_undo (Vstandard_output);
+  current_buffer->read_only = Qnil;
+
+  write_string ("\
+ MR Buffer         Size  Mode           File\n\
+ -- ------         ----  ----           ----\n", -1);
+
+  for (tail = Vbuffer_alist; !NULL (tail); tail = Fcdr (tail))
+    {
+      buf = Fcdr (Fcar (tail));
+      b = XBUFFER (buf);
+      /* Don't mention the minibuffers. */
+      if (XSTRING (b->name)->data[0] == ' ')
+        continue;
+      /* Optionally don't mention buffers that lack files. */
+      if (!NULL (files) && NULL (b->filename))
+        continue;
+      /* Identify the current buffer. */
+      if (b == old)
+        desired_point = point;
+      write_string (b == old ? "." : " ", -1);
+      /* Identify modified buffers */
+      write_string (BUF_MODIFF (b) > b->save_modified ? "*" : " ", -1);
+      write_string (NULL (b->read_only) ? "  " : "% ", -1);
+      Fprinc (b->name, Qnil);
+      Findent_to (col1, make_number (2));
+      XFASTINT (tem) = BUF_Z (b) - BUF_BEG (b);
+      Fprin1 (tem, Qnil);
+      Findent_to (col2, minspace);
+      Fprinc (b->mode_name, Qnil);
+      Findent_to (col3, minspace);
+
+      if (!NULL (b->filename))
+        Fprinc (b->filename, Qnil);
+      else
+        {
+          /* No visited file; check local value of list-buffers-directory.  */
+          Lisp_Object tem;
+          set_buffer_internal (b);
+          tem = Fboundp (other_file_symbol);
+          if (!NULL (tem))
+            {
+              tem = Fsymbol_value (other_file_symbol);
+              Fset_buffer (Vstandard_output);
+              if (XTYPE (tem) == Lisp_String)
+                Fprinc (tem, Qnil);
+            }
+          else
+            Fset_buffer (Vstandard_output);
+        }
+      write_string ("\n", -1);
+    }
+
+  current_buffer->read_only = Qt;
+  set_buffer_internal (old);
+/* Foo.  This doesn't work since temp_output_buffer_show sets point to 1
+  if (desired_point)
+    XBUFFER (Vstandard_output)->text.pointloc = desired_point;
+ */
+  return Qnil;
+}
+
+DEFUN ("list-buffers", Flist_buffers, Slist_buffers, 0, 1, "P",
+  "Display a list of names of existing buffers.\n\
+The list is displayed in a buffer named `*Buffer List*'.\n\
+Note that buffers with names starting with spaces are omitted.\n\
+Non-null optional arg FILES-ONLY means mention only file buffers.\n\
+\n\
+The M column contains a * for buffers that are modified.\n\
+The R column contains a % for buffers that are read-only.")
+  (files)
+     Lisp_Object files;
+{
+  internal_with_output_to_temp_buffer ("*Buffer List*",
+                                       list_buffers_1, files);
+  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.\n\
+Most local variable bindings are eliminated so that the default values\n\
+become effective once more.  Also, the syntax table is set from\n\
+`standard-syntax-table', the local keymap is set to nil,\n\
+and the abbrev table from `fundamental-mode-abbrev-table'.\n\
+This function also forces redisplay of the mode line.\n\
+\n\
+Every function to select a new major mode starts by\n\
+calling this function.\n\n\
+As a special exception, local variables whose names have\n\
+a non-nil `permanent-local' property are not eliminated by this function.")
+  ()
+{
+  register Lisp_Object alist, sym, tem;
+  Lisp_Object oalist;
+  oalist = current_buffer->local_var_alist;
+
+  /* Make sure no local variables remain set up with this buffer
+     for their current values.  */
+
+  for (alist = oalist; !NULL (alist); alist = XCONS (alist)->cdr)
+    {
+      sym = XCONS (XCONS (alist)->car)->car;
+
+      /* Need not do anything if some other buffer's binding is now encached.  */
+      tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car;
+      if (XBUFFER (tem) == current_buffer)
+        {
+          /* Symbol is set up for this buffer's old local value.
+             Set it up for the current buffer with the default value.  */
+
+          tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->cdr;
+          XCONS (tem)->car = tem;
+          XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car = Fcurrent_buffer ();
+          store_symval_forwarding (sym, XCONS (XSYMBOL (sym)->value)->car,
+                                   XCONS (tem)->cdr);
+        }
+    }
+
+  /* Actually eliminate all local bindings of this buffer.  */
+
+  reset_buffer_local_variables (current_buffer);
+
+  /* Redisplay mode lines; we are changing major mode.  */
+
+  update_mode_lines++;
+
+  /* Any which are supposed to be permanent,
+     make local again, with the same values they had.  */
+     
+  for (alist = oalist; !NULL (alist); alist = XCONS (alist)->cdr)
+    {
+      sym = XCONS (XCONS (alist)->car)->car;
+      tem = Fget (sym, Qpermanent_local);
+      if (! NULL (tem))
+        Fmake_local_variable (sym, XCONS (XCONS (alist)->car)->cdr);
+    }
+
+  /* Force mode-line redisplay.  Useful here because all major mode
+     commands call this function.  */
+  update_mode_lines++;
+
+  return Qnil;
+}
+
+DEFUN ("region-fields", Fregion_fields, Sregion_fields, 2, 4, "", 
+  "Return list of fields overlapping a given portion of a buffer.\n\
+The portion is specified by arguments START, END and BUFFER.\n\
+BUFFER defaults to the current buffer.\n\
+Optional 4th arg ERROR-CHECK non nil means just report an error\n\
+if any protected fields overlap this portion.")
+  (start, end, buffer, error_check)
+     Lisp_Object start, end, buffer, error_check;
+{
+  register int start_loc, end_loc;
+  Lisp_Object fieldlist;
+  Lisp_Object collector;
+
+  if (NULL (buffer))
+    fieldlist = current_buffer->fieldlist;
+  else
+    {
+      CHECK_BUFFER (buffer, 1);
+      fieldlist = XBUFFER (buffer)->fieldlist;
+    }
+
+  CHECK_NUMBER_COERCE_MARKER (start, 2);
+  start_loc = XINT (start);
+
+  CHECK_NUMBER_COERCE_MARKER (end, 2);
+  end_loc = XINT (end);
+  
+  collector = Qnil;
+  
+  while (XTYPE (fieldlist) == Lisp_Cons)
+    {
+      register Lisp_Object field;
+      register int field_start, field_end;
+
+      field = XCONS (fieldlist)->car;
+      field_start = marker_position (FIELD_START_MARKER (field)) - 1;
+      field_end = marker_position (FIELD_END_MARKER (field));
+
+      if ((start_loc < field_start && end_loc > field_start)
+          || (start_loc >= field_start && start_loc < field_end))
+        {
+          if (!NULL (error_check))
+            {
+              if (!NULL (FIELD_PROTECTED_FLAG (field)))
+                {
+                  struct gcpro gcpro1;
+                  GCPRO1 (fieldlist);
+                  Fsignal (Qprotected_field, Fcons (field, Qnil));
+                  UNGCPRO;
+                }
+            }
+          else
+            collector = Fcons (field, collector);
+        }
+      
+      fieldlist = XCONS (fieldlist)->cdr;
+    }
+
+  return collector;
+}
+
+init_buffer_once ()
+{
+  register Lisp_Object tem;
+
+  /* Make sure all markable slots in buffer_defaults
+     are initialized reasonably, so mark_buffer won't choke.  */
+  reset_buffer (&buffer_defaults);
+  reset_buffer (&buffer_local_symbols);
+  XSET (Vbuffer_defaults, Lisp_Buffer, &buffer_defaults);
+  XSET (Vbuffer_local_symbols, Lisp_Buffer, &buffer_local_symbols);
+
+  /* Set up the default values of various buffer slots.  */
+  /* Must do these before making the first buffer! */
+
+  /* real setup is done in loaddefs.el */
+  buffer_defaults.mode_line_format = build_string ("%-");
+  buffer_defaults.abbrev_mode = Qnil;
+  buffer_defaults.overwrite_mode = Qnil;
+  buffer_defaults.case_fold_search = Qt;
+  buffer_defaults.auto_fill_function = Qnil;
+  buffer_defaults.selective_display = Qnil;
+#ifndef old
+  buffer_defaults.selective_display_ellipses = Qt;
+#endif
+  buffer_defaults.abbrev_table = Qnil;
+  buffer_defaults.display_table = Qnil;
+  buffer_defaults.fieldlist = Qnil;
+  buffer_defaults.undo_list = Qnil;
+
+  XFASTINT (buffer_defaults.tab_width) = 8;
+  buffer_defaults.truncate_lines = Qnil;
+  buffer_defaults.ctl_arrow = Qt;
+
+  XFASTINT (buffer_defaults.fill_column) = 70;
+  XFASTINT (buffer_defaults.left_margin) = 0;
+
+  /* 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.  */
+
+  /* Nothing can work if this isn't true */
+  if (sizeof (int) != sizeof (Lisp_Object)) abort ();
+
+  /* 0 means not a lisp var, -1 means always local, else mask */
+  bzero (&buffer_local_flags, sizeof buffer_local_flags);
+  XFASTINT (buffer_local_flags.filename) = -1;
+  XFASTINT (buffer_local_flags.directory) = -1;
+  XFASTINT (buffer_local_flags.backed_up) = -1;
+  XFASTINT (buffer_local_flags.save_length) = -1;
+  XFASTINT (buffer_local_flags.auto_save_file_name) = -1;
+  XFASTINT (buffer_local_flags.read_only) = -1;
+  XFASTINT (buffer_local_flags.major_mode) = -1;
+  XFASTINT (buffer_local_flags.mode_name) = -1;
+  XFASTINT (buffer_local_flags.undo_list) = -1;
+
+  XFASTINT (buffer_local_flags.mode_line_format) = 1;
+  XFASTINT (buffer_local_flags.abbrev_mode) = 2;
+  XFASTINT (buffer_local_flags.overwrite_mode) = 4;
+  XFASTINT (buffer_local_flags.case_fold_search) = 8;
+  XFASTINT (buffer_local_flags.auto_fill_function) = 0x10;
+  XFASTINT (buffer_local_flags.selective_display) = 0x20;
+#ifndef old
+  XFASTINT (buffer_local_flags.selective_display_ellipses) = 0x40;
+#endif
+  XFASTINT (buffer_local_flags.tab_width) = 0x80;
+  XFASTINT (buffer_local_flags.truncate_lines) = 0x100;
+  XFASTINT (buffer_local_flags.ctl_arrow) = 0x200;
+  XFASTINT (buffer_local_flags.fill_column) = 0x400;
+  XFASTINT (buffer_local_flags.left_margin) = 0x800;
+  XFASTINT (buffer_local_flags.abbrev_table) = 0x1000;
+  XFASTINT (buffer_local_flags.display_table) = 0x2000;
+  XFASTINT (buffer_local_flags.fieldlist) = 0x4000;
+  XFASTINT (buffer_local_flags.syntax_table) = 0x8000;
+
+  Vbuffer_alist = Qnil;
+  current_buffer = 0;
+  all_buffers = 0;
+
+  QSFundamental = build_string ("Fundamental");
+
+  Qfundamental_mode = intern ("fundamental-mode");
+  buffer_defaults.major_mode = Qfundamental_mode;
+
+  Qmode_class = intern ("mode-class");
+
+  Qprotected_field = intern ("protected-field");
+
+  Qpermanent_local = intern ("permanent-local");
+
+  Qkill_buffer_hook = intern ("kill-buffer-hook");
+
+  Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1"));
+  /* super-magic invisible buffer */
+  Vbuffer_alist = Qnil;
+
+  tem = Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
+  /* Want no undo records for *scratch*
+     until after Emacs is dumped */
+  Fbuffer_disable_undo (tem);
+}
+
+init_buffer ()
+{
+  char buf[MAXPATHLEN+1];
+
+  Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
+  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.  */
+  if (buf[strlen (buf) - 1] != '/')
+    strcat (buf, "/");
+#endif /* not VMS */
+  current_buffer->directory = build_string (buf);
+}
+
+/* initialize the buffer routines */
+syms_of_buffer ()
+{
+  staticpro (&Vbuffer_defaults);
+  staticpro (&Vbuffer_local_symbols);
+  staticpro (&Qfundamental_mode);
+  staticpro (&Qmode_class);
+  staticpro (&QSFundamental);
+  staticpro (&Vbuffer_alist);
+  staticpro (&Qprotected_field);
+  staticpro (&Qpermanent_local);
+  staticpro (&Qkill_buffer_hook);
+
+  Fput (Qprotected_field, Qerror_conditions,
+        Fcons (Qprotected_field, Fcons (Qerror, Qnil)));
+  Fput (Qprotected_field, Qerror_message,
+        build_string ("Attempt to modify a protected field"));
+
+  /* All these use DEFVAR_LISP_NOPRO because the slots in
+     buffer_defaults will all be marked via Vbuffer_defaults.  */
+
+  DEFVAR_LISP_NOPRO ("default-mode-line-format",
+                     &buffer_defaults.mode_line_format,
+    "Default value of `mode-line-format' for buffers that don't override it.\n\
+This is the same as (default-value 'mode-line-format).");
+
+  DEFVAR_LISP_NOPRO ("default-abbrev-mode",
+              &buffer_defaults.abbrev_mode,
+    "Default value of `abbrev-mode' for buffers that do not override it.\n\
+This is the same as (default-value 'abbrev-mode).");
+
+  DEFVAR_LISP_NOPRO ("default-ctl-arrow",
+              &buffer_defaults.ctl_arrow,
+    "Default value of `ctl-arrow' for buffers that do not override it.\n\
+This is the same as (default-value 'ctl-arrow).");
+
+  DEFVAR_LISP_NOPRO ("default-truncate-lines",
+              &buffer_defaults.truncate_lines,
+    "Default value of `truncate-lines' for buffers that do not override it.\n\
+This is the same as (default-value 'truncate-lines).");
+
+  DEFVAR_LISP_NOPRO ("default-fill-column",
+              &buffer_defaults.fill_column,
+    "Default value of `fill-column' for buffers that do not override it.\n\
+This is the same as (default-value 'fill-column).");
+
+  DEFVAR_LISP_NOPRO ("default-left-margin",
+              &buffer_defaults.left_margin,
+    "Default value of `left-margin' for buffers that do not override it.\n\
+This is the same as (default-value 'left-margin).");
+
+  DEFVAR_LISP_NOPRO ("default-tab-width",
+              &buffer_defaults.tab_width,
+    "Default value of `tab-width' for buffers that do not override it.\n\
+This is the same as (default-value 'tab-width).");
+
+  DEFVAR_LISP_NOPRO ("default-case-fold-search",
+              &buffer_defaults.case_fold_search,
+    "Default value of `case-fold-search' for buffers that don't override it.\n\
+This is the same as (default-value 'case-fold-search).");
+
+  DEFVAR_PER_BUFFER ("mode-line-format", &current_buffer->mode_line_format, 0);
+
+/* This doc string is too long for cpp; cpp dies if it isn't in a comment.
+   But make-docfile finds it!
+  DEFVAR_PER_BUFFER ("mode-line-format", &current_buffer->mode_line_format,
+    "Template for displaying mode line for current buffer.\n\
+Each buffer has its own value of this variable.\n\
+Value may be a string, a symbol or a list or cons cell.\n\
+For a symbol, its value is used (but it is ignored if t or nil).\n\
+ A string appearing directly as the value of a symbol is processed verbatim\n\
+ in that the %-constructs below are not recognized.\n\
+For a list whose car is a symbol, the symbol's value is taken,\n\
+ and if that is non-nil, the cadr of the list is processed recursively.\n\
+ Otherwise, the caddr of the list (if there is one) is processed.\n\
+For a list whose car is a string or list, each element is processed\n\
+ recursively and the results are effectively concatenated.\n\
+For a list whose car is an integer, the cdr of the list is processed\n\
+  and padded (if the number is positive) or truncated (if negative)\n\
+  to the width specified by that number.\n\
+A string is printed verbatim in the mode line except for %-constructs:\n\
+  (%-constructs are allowed when the string is the entire mode-line-format\n\
+   or when it is found in a cons-cell or a list)\n\
+  %b -- print buffer name.      %f -- print visited file name.\n\
+  %* -- print *, % or hyphen.   %m -- print value of mode-name (obsolete).\n\
+  %s -- print process status.   %M -- print value of global-mode-string. (obs)\n\
+  %p -- print percent of buffer above top of window, or top, bot or all.\n\
+  %n -- print Narrow if appropriate.\n\
+  %[ -- print one [ for each recursive editing level.  %] similar.\n\
+  %% -- print %.   %- -- print infinitely many dashes.\n\
+Decimal digits after the % specify field width to which to pad.");
+*/
+
+  DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode,
+    "*Major mode for new buffers.  Defaults to `fundamental-mode'.\n\
+nil here means use current buffer's major mode.");
+
+  DEFVAR_PER_BUFFER ("major-mode", &current_buffer->major_mode,
+    "Symbol for current buffer's major mode.");
+
+  DEFVAR_PER_BUFFER ("mode-name", &current_buffer->mode_name,
+    "Pretty name of current buffer's major mode (a string).");
+
+  DEFVAR_PER_BUFFER ("abbrev-mode", &current_buffer->abbrev_mode,
+    "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
+Automatically becomes buffer-local when set in any fashion.");
+
+  DEFVAR_PER_BUFFER ("case-fold-search", &current_buffer->case_fold_search,
+    "*Non-nil if searches should ignore case.\n\
+Automatically becomes buffer-local when set in any fashion.");
+
+  DEFVAR_PER_BUFFER ("fill-column", &current_buffer->fill_column,
+    "*Column beyond which automatic line-wrapping should happen.\n\
+Automatically becomes buffer-local when set in any fashion.");
+
+  DEFVAR_PER_BUFFER ("left-margin", &current_buffer->left_margin,
+    "*Column for the default indent-line-function to indent to.\n\
+Linefeed indents to this column in Fundamental mode.\n\
+Automatically becomes buffer-local when set in any fashion.");
+
+  DEFVAR_PER_BUFFER ("tab-width", &current_buffer->tab_width,
+    "*Distance between tab stops (for display of tab characters), in columns.\n\
+Automatically becomes buffer-local when set in any fashion.");
+
+  DEFVAR_PER_BUFFER ("ctl-arrow", &current_buffer->ctl_arrow,
+    "*Non-nil means display control chars with uparrow.\n\
+Nil means use backslash and octal digits.\n\
+Automatically becomes buffer-local when set in any fashion.\n\
+This variable does not apply to characters whose display is specified\n\
+in the current display table (if there is one).");
+
+  DEFVAR_PER_BUFFER ("truncate-lines", &current_buffer->truncate_lines,
+    "*Non-nil means do not display continuation lines;\n\
+give each line of text one screen line.\n\
+Automatically becomes buffer-local when set in any fashion.\n\
+\n\
+Note that this is overridden by the variable\n\
+`truncate-partial-width-windows' if that variable is non-nil\n\
+and this buffer is not full-screen width.");
+
+  DEFVAR_PER_BUFFER ("default-directory", &current_buffer->directory,
+    "Name of default directory of current buffer.  Should end with slash.\n\
+Each buffer has its own value of this variable.");
+
+  DEFVAR_PER_BUFFER ("auto-fill-function", &current_buffer->auto_fill_function,
+    "Function called (if non-nil) to perform auto-fill.\n\
+It is called after self-inserting a space at a column beyond `fill-column'.\n\
+Each buffer has its own value of this variable.\n\
+NOTE: This variable is not an ordinary hook;\n\
+It may not be a list of functions.");
+
+  DEFVAR_PER_BUFFER ("buffer-file-name", &current_buffer->filename,
+    "Name of file visited in current buffer, or nil if not visiting a file.\n\
+Each buffer has its own value of this variable.");
+
+  DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
+                    &current_buffer->auto_save_file_name,
+    "Name of file for auto-saving current buffer,\n\
+or nil if buffer should not be auto-saved.\n\
+Each buffer has its own value of this variable.");
+
+  DEFVAR_PER_BUFFER ("buffer-read-only", &current_buffer->read_only,
+    "Non-nil if this buffer is read-only.\n\
+Each buffer has its own value of this variable.");
+
+  DEFVAR_PER_BUFFER ("buffer-backed-up", &current_buffer->backed_up,
+    "Non-nil if this buffer's file has been backed up.\n\
+Backing up is done before the first time the file is saved.\n\
+Each buffer has its own value of this variable.");
+
+  DEFVAR_PER_BUFFER ("buffer-saved-size", &current_buffer->save_length,
+    "Length of current buffer when last read in, saved or auto-saved.\n\
+0 initially.\n\
+Each buffer has its own value of this variable.");
+
+  DEFVAR_PER_BUFFER ("selective-display", &current_buffer->selective_display,
+    "Non-nil enables selective display:\n\
+Integer N as value means display only lines\n\
+ that start with less than n columns of space.\n\
+A value of t means, after a ^M, all the rest of the line is invisible.\n\
+ Then ^M's in the file are written into files as newlines.\n\n\
+Automatically becomes buffer-local when set in any fashion.");
+
+#ifndef old
+  DEFVAR_PER_BUFFER ("selective-display-ellipses",
+                    &current_buffer->selective_display_ellipses,
+    "t means display ... on previous line when a line is invisible.\n\
+Automatically becomes buffer-local when set in any fashion.");
+#endif
+
+  DEFVAR_PER_BUFFER ("overwrite-mode", &current_buffer->overwrite_mode,
+    "Non-nil if self-insertion should replace existing text.\n\
+Automatically becomes buffer-local when set in any fashion.");
+
+  DEFVAR_PER_BUFFER ("buffer-display-table", &current_buffer->display_table,
+    "Display table that controls display of the contents of current buffer.\n\
+Automatically becomes buffer-local when set in any fashion.\n\
+The display table is a vector created with `make-display-table'.\n\
+The first 256 elements control how to display each possible text character.\n\
+The value should be a \"rope\" (see `make-rope') or nil;\n\
+nil means display the character in the default fashion.\n\
+The remaining five elements are ropes that control the display of\n\
+  the end of a truncated screen line (element 256);\n\
+  the end of a continued line (element 257);\n\
+  the escape character used to display character codes in octal (element 258);\n\
+  the character used as an arrow for control characters (element 259);\n\
+  the decoration indicating the presence of invisible lines (element 260).\n\
+If this variable is nil, the value of `standard-display-table' is used.\n\
+Each window can have its own, overriding display table.");
+
+  DEFVAR_PER_BUFFER ("buffer-field-list", &current_buffer->fieldlist,
+    "List of fields in the current buffer.  See `add-field'.");
+
+  DEFVAR_BOOL ("check-protected-fields", check_protected_fields,
+    "Non-nil means don't allow modification of a protected field.\n\
+See `add-field'.");
+  check_protected_fields = 0;
+
+/*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
+    "Don't ask.");
+*/
+  DEFVAR_LISP ("bgfore-change-function", &Vbefore_change_function,
+               "Function to call before each text change.\n\
+Two arguments are passed to the function: the positions of\n\
+the beginning and end of the range of old text to be changed.\n\
+\(For an insertion, the beginning and end are at the same place.)\n\
+No information is given about the length of the text after the change.\n\
+position of the change\n\
+\n\
+While executing the `before-change-function', changes to buffers do not\n\
+cause calls to any `before-change-function' or `after-change-function'.");
+  Vbefore_change_function = Qnil;
+
+  DEFVAR_LISP ("after-change-function", &Vafter_change_function,
+               "Function to call after each text change.\n\
+Three arguments are passed to the function: the positions of\n\
+the beginning and end of the range of changed text,\n\
+and the length of the pre-change text replaced by that range.\n\
+\(For an insertion, the pre-change length is zero;\n\
+for a deletion, that length is the number of characters deleted,\n\
+and the post-change beginning and end are at the same place.)\n\
+\n\
+While executing the `after-change-function', changes to buffers do not\n\
+cause calls to any `before-change-function' or `after-change-function'.");
+  Vafter_change_function = Qnil;
+
+  DEFVAR_LISP ("first-change-function", &Vfirst_change_function,
+  "Function to call before changing a buffer which is unmodified.\n\
+The function is called, with no arguments, if it is non-nil.");
+  Vfirst_change_function = Qnil;
+
+  DEFVAR_PER_BUFFER ("buffer-undo-list", &current_buffer->undo_list,
+    "List of undo entries in current buffer.\n\
+Recent changes come first; older changes follow newer.\n\
+\n\
+An entry (START . END) represents an insertion which begins at\n\
+position START and ends at position END.\n\
+\n\
+An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
+from (abs POSITION).  If POSITION is positive, point was at the front\n\
+of the text being deleted; if negative, point was at the end.\n\
+\n\
+An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\
+previously unmodified.  HIGHWORD and LOWWORD are the high and low\n\
+16-bit words of the buffer's modification count at the time.  If the\n\
+modification count of the most recent save is different, this entry is\n\
+obsolete.\n\
+\n\
+nil marks undo boundaries.  The undo command treats the changes\n\
+between two undo boundaries as a single step to be undone.\n\
+\n\
+If the value of the variable is t, undo information is not recorded.\n\
+");
+
+  defsubr (&Sbuffer_list);
+  defsubr (&Sget_buffer);
+  defsubr (&Sget_file_buffer);
+  defsubr (&Sget_buffer_create);
+  defsubr (&Sgenerate_new_buffer);
+  defsubr (&Sbuffer_name);
+/*defsubr (&Sbuffer_number);*/
+  defsubr (&Sbuffer_file_name);
+  defsubr (&Sbuffer_local_variables);
+  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 (&Sswitch_to_buffer);
+  defsubr (&Spop_to_buffer);
+  defsubr (&Scurrent_buffer);
+  defsubr (&Sset_buffer);
+  defsubr (&Sbarf_if_buffer_read_only);
+  defsubr (&Sbury_buffer);
+  defsubr (&Slist_buffers);
+  defsubr (&Skill_all_local_variables);
+  defsubr (&Sregion_fields);
+}
+
+keys_of_buffer ()
+{
+  initial_define_key (control_x_map, 'b', "switch-to-buffer");
+  initial_define_key (control_x_map, 'k', "kill-buffer");
+  initial_define_key (control_x_map, Ctl ('B'), "list-buffers");
+}