text: /* vi:set ts=8 sts=4 sw=4:
   *
   * VIM - Vi IMproved	by Bram Moolenaar
   *
   * Do ":help uganda"  in Vim to read copying and usage conditions.
   * Do ":help credits" in Vim to see a list of people who contributed.
   * See README.txt for an overview of the Vim source code.
   */
  
  /*
   * buffer.c: functions for dealing with the buffer structure
   */
  
  /*
   * The buffer list is a double linked list of all buffers.
   * Each buffer can be in one of these states:
   * never loaded: BF_NEVERLOADED is set, only the file name is valid
   *   not loaded: b_ml.ml_mfp == NULL, no memfile allocated
   *	 hidden: b_nwindows == 0, loaded but not displayed in a window
   *	 normal: loaded and displayed in a window
   *
   * Instead of storing file names all over the place, each file name is
   * stored in the buffer list. It can be referenced by a number.
   *
   * The current implementation remembers all file names ever used.
   */
  
  #include "vim.h"
  
  #if defined(FEAT_CMDL_COMPL) || defined(FEAT_LISTCMDS) || defined(FEAT_EVAL) || defined(FEAT_PERL)
  static char_u	*buflist_match __ARGS((regprog_T *prog, buf_T *buf));
  # define HAVE_BUFLIST_MATCH
  static char_u	*fname_match __ARGS((regprog_T *prog, char_u *name));
  #endif
  static void	buflist_setfpos __ARGS((buf_T *buf, win_T *win, linenr_T lnum, colnr_T col, int copy_options));
  static wininfo_T *find_wininfo __ARGS((buf_T *buf, int skip_diff_buffer));
  #ifdef UNIX
  static buf_T	*buflist_findname_stat __ARGS((char_u *ffname, struct stat *st));
  static int	otherfile_buf __ARGS((buf_T *buf, char_u *ffname, struct stat *stp));
  static int	buf_same_ino __ARGS((buf_T *buf, struct stat *stp));
  #else
  static int	otherfile_buf __ARGS((buf_T *buf, char_u *ffname));
  #endif
  #ifdef FEAT_TITLE
  static int	ti_change __ARGS((char_u *str, char_u **last));
  #endif
  static int	append_arg_number __ARGS((win_T *wp, char_u *buf, int buflen, int add_file));
  static void	free_buffer __ARGS((buf_T *));
  static void	free_buffer_stuff __ARGS((buf_T *buf, int free_options));
  static void	clear_wininfo __ARGS((buf_T *buf));
  
  #ifdef UNIX
  # define dev_T dev_t
  #else
  # define dev_T unsigned
  #endif
  
  #if defined(FEAT_SIGNS)
  static void insert_sign __ARGS((buf_T *buf, signlist_T *prev, signlist_T *next, int id, linenr_T lnum, int typenr));
  #endif
  
  #if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
  static char *msg_loclist = N_("[Location List]");
  static char *msg_qflist = N_("[Quickfix List]");
  #endif
  #ifdef FEAT_AUTOCMD
  static char *e_auabort = N_("E855: Autocommands caused command to abort");
  #endif
  
  /*
   * Open current buffer, that is: open the memfile and read the file into
   * memory.
   * Return FAIL for failure, OK otherwise.
   */
      int
  open_buffer(read_stdin, eap, flags)
      int		read_stdin;	    /* read file from stdin */
      exarg_T	*eap;		    /* for forced 'ff' and 'fenc' or NULL */
      int		flags;		    /* extra flags for readfile() */
  {
      int		retval = OK;
  #ifdef FEAT_AUTOCMD
      buf_T	*old_curbuf;
  #endif
  
      /*
       * The 'readonly' flag is only set when BF_NEVERLOADED is being reset.
       * When re-entering the same buffer, it should not change, because the
       * user may have reset the flag by hand.
       */
      if (readonlymode && curbuf->b_ffname != NULL
  					&& (curbuf->b_flags & BF_NEVERLOADED))
  	curbuf->b_p_ro = TRUE;
  
      if (ml_open(curbuf) == FAIL)
      {
  	/*
  	 * There MUST be a memfile, otherwise we can't do anything
  	 * If we can't create one for the current buffer, take another buffer
  	 */
  	close_buffer(NULL, curbuf, 0, FALSE);
  	for (curbuf = firstbuf; curbuf != NULL; curbuf = curbuf->b_next)
  	    if (curbuf->b_ml.ml_mfp != NULL)
  		break;
  	/*
  	 * if there is no memfile at all, exit
  	 * This is OK, since there are no changes to lose.
  	 */
  	if (curbuf == NULL)
  	{
  	    EMSG(_("E82: Cannot allocate any buffer, exiting..."));
  	    getout(2);
  	}
  	EMSG(_("E83: Cannot allocate buffer, using other one..."));
  	enter_buffer(curbuf);
  	return FAIL;
      }
  
  #ifdef FEAT_AUTOCMD
      /* The autocommands in readfile() may change the buffer, but only AFTER
       * reading the file. */
      old_curbuf = curbuf;
      modified_was_set = FALSE;
  #endif
  
      /* mark cursor position as being invalid */
      curwin->w_valid = 0;
  
      if (curbuf->b_ffname != NULL
  #ifdef FEAT_NETBEANS_INTG
  	    && netbeansReadFile
  #endif
         )
      {
  #ifdef FEAT_NETBEANS_INTG
  	int oldFire = netbeansFireChanges;
  
  	netbeansFireChanges = 0;
  #endif
  	retval = readfile(curbuf->b_ffname, curbuf->b_fname,
  		  (linenr_T)0, (linenr_T)0, (linenr_T)MAXLNUM, eap,
  		  flags | READ_NEW);
  #ifdef FEAT_NETBEANS_INTG
  	netbeansFireChanges = oldFire;
  #endif
  	/* Help buffer is filtered. */
  	if (curbuf->b_help)
  	    fix_help_buffer();
      }
      else if (read_stdin)
      {
  	int		save_bin = curbuf->b_p_bin;
  	linenr_T	line_count;
  
  	/*
  	 * First read the text in binary mode into the buffer.
  	 * Then read from that same buffer and append at the end.  This makes
  	 * it possible to retry when 'fileformat' or 'fileencoding' was
  	 * guessed wrong.
  	 */
  	curbuf->b_p_bin = TRUE;
  	retval = readfile(NULL, NULL, (linenr_T)0,
  		  (linenr_T)0, (linenr_T)MAXLNUM, NULL,
  		  flags | (READ_NEW + READ_STDIN));
  	curbuf->b_p_bin = save_bin;
  	if (retval == OK)
  	{
  	    line_count = curbuf->b_ml.ml_line_count;
  	    retval = readfile(NULL, NULL, (linenr_T)line_count,
  			    (linenr_T)0, (linenr_T)MAXLNUM, eap,
  			    flags | READ_BUFFER);
  	    if (retval == OK)
  	    {
  		/* Delete the binary lines. */
  		while (--line_count >= 0)
  		    ml_delete((linenr_T)1, FALSE);
  	    }
  	    else
  	    {
  		/* Delete the converted lines. */
  		while (curbuf->b_ml.ml_line_count > line_count)
  		    ml_delete(line_count, FALSE);
  	    }
  	    /* Put the cursor on the first line. */
  	    curwin->w_cursor.lnum = 1;
  	    curwin->w_cursor.col = 0;
  
  	    /* Set or reset 'modified' before executing autocommands, so that
  	     * it can be changed there. */
  	    if (!readonlymode && !bufempty())
  		changed();
  	    else if (retval != FAIL)
  		unchanged(curbuf, FALSE);
  #ifdef FEAT_AUTOCMD
  # ifdef FEAT_EVAL
  	    apply_autocmds_retval(EVENT_STDINREADPOST, NULL, NULL, FALSE,
  							curbuf, &retval);
  # else
  	    apply_autocmds(EVENT_STDINREADPOST, NULL, NULL, FALSE, curbuf);
  # endif
  #endif
  	}
      }
  
      /* if first time loading this buffer, init b_chartab[] */
      if (curbuf->b_flags & BF_NEVERLOADED)
  	(void)buf_init_chartab(curbuf, FALSE);
  
      /*
       * Set/reset the Changed flag first, autocmds may change the buffer.
       * Apply the automatic commands, before processing the modelines.
       * So the modelines have priority over auto commands.
       */
      /* When reading stdin, the buffer contents always needs writing, so set
       * the changed flag.  Unless in readonly mode: "ls | gview -".
       * When interrupted and 'cpoptions' contains 'i' set changed flag. */
      if ((got_int && vim_strchr(p_cpo, CPO_INTMOD) != NULL)
  #ifdef FEAT_AUTOCMD
  		|| modified_was_set	/* ":set modified" used in autocmd */
  # ifdef FEAT_EVAL
  		|| (aborting() && vim_strchr(p_cpo, CPO_INTMOD) != NULL)
  # endif
  #endif
         )
  	changed();
      else if (retval != FAIL && !read_stdin)
  	unchanged(curbuf, FALSE);
      save_file_ff(curbuf);		/* keep this fileformat */
  
      /* require "!" to overwrite the file, because it wasn't read completely */
  #ifdef FEAT_EVAL
      if (aborting())
  #else
      if (got_int)
  #endif
  	curbuf->b_flags |= BF_READERR;
  
  #ifdef FEAT_FOLDING
      /* Need to update automatic folding.  Do this before the autocommands,
       * they may use the fold info. */
      foldUpdateAll(curwin);
  #endif
  
  #ifdef FEAT_AUTOCMD
      /* need to set w_topline, unless some autocommand already did that. */
      if (!(curwin->w_valid & VALID_TOPLINE))
      {
  	curwin->w_topline = 1;
  # ifdef FEAT_DIFF
  	curwin->w_topfill = 0;
  # endif
      }
  # ifdef FEAT_EVAL
      apply_autocmds_retval(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf, &retval);
  # else
      apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf);
  # endif
  #endif
  
      if (retval != FAIL)
      {
  #ifdef FEAT_AUTOCMD
  	/*
  	 * The autocommands may have changed the current buffer.  Apply the
  	 * modelines to the correct buffer, if it still exists and is loaded.
  	 */
  	if (buf_valid(old_curbuf) && old_curbuf->b_ml.ml_mfp != NULL)
  	{
  	    aco_save_T	aco;
  
  	    /* Go to the buffer that was opened. */
  	    aucmd_prepbuf(&aco, old_curbuf);
  #endif
  	    do_modelines(0);
  	    curbuf->b_flags &= ~(BF_CHECK_RO | BF_NEVERLOADED);
  
  #ifdef FEAT_AUTOCMD
  # ifdef FEAT_EVAL
  	    apply_autocmds_retval(EVENT_BUFWINENTER, NULL, NULL, FALSE, curbuf,
  								    &retval);
  # else
  	    apply_autocmds(EVENT_BUFWINENTER, NULL, NULL, FALSE, curbuf);
  # endif
  
  	    /* restore curwin/curbuf and a few other things */
  	    aucmd_restbuf(&aco);
  	}
  #endif
      }
  
      return retval;
  }
  
  /*
   * Return TRUE if "buf" points to a valid buffer (in the buffer list).
   */
      int
  buf_valid(buf)
      buf_T	*buf;
  {
      buf_T	*bp;
  
      for (bp = firstbuf; bp != NULL; bp = bp->b_next)
  	if (bp == buf)
  	    return TRUE;
      return FALSE;
  }
  
  /*
   * Close the link to a buffer.
   * "action" is used when there is no longer a window for the buffer.
   * It can be:
   * 0			buffer becomes hidden
   * DOBUF_UNLOAD		buffer is unloaded
   * DOBUF_DELETE		buffer is unloaded and removed from buffer list
   * DOBUF_WIPE		buffer is unloaded and really deleted
   * When doing all but the first one on the current buffer, the caller should
   * get a new buffer very soon!
   *
   * The 'bufhidden' option can force freeing and deleting.
   *
   * When "abort_if_last" is TRUE then do not close the buffer if autocommands
   * cause there to be only one window with this buffer.  e.g. when ":quit" is
   * supposed to close the window but autocommands close all other windows.
   */
      void
  close_buffer(win, buf, action, abort_if_last)
      win_T	*win;		/* if not NULL, set b_last_cursor */
      buf_T	*buf;
      int		action;
      int		abort_if_last UNUSED;
  {
  #ifdef FEAT_AUTOCMD
      int		is_curbuf;
      int		nwindows;
  #endif
      int		unload_buf = (action != 0);
      int		del_buf = (action == DOBUF_DEL || action == DOBUF_WIPE);
      int		wipe_buf = (action == DOBUF_WIPE);
  
  #ifdef FEAT_QUICKFIX
      /*
       * Force unloading or deleting when 'bufhidden' says so.
       * The caller must take care of NOT deleting/freeing when 'bufhidden' is
       * "hide" (otherwise we could never free or delete a buffer).
       */
      if (buf->b_p_bh[0] == 'd')		/* 'bufhidden' == "delete" */
      {
  	del_buf = TRUE;
  	unload_buf = TRUE;
      }
      else if (buf->b_p_bh[0] == 'w')	/* 'bufhidden' == "wipe" */
      {
  	del_buf = TRUE;
  	unload_buf = TRUE;
  	wipe_buf = TRUE;
      }
      else if (buf->b_p_bh[0] == 'u')	/* 'bufhidden' == "unload" */
  	unload_buf = TRUE;
  #endif
  
      if (win != NULL)
      {
  	/* Set b_last_cursor when closing the last window for the buffer.
  	 * Remember the last cursor position and window options of the buffer.
  	 * This used to be only for the current window, but then options like
  	 * 'foldmethod' may be lost with a ":only" command. */
  	if (buf->b_nwindows == 1)
  	    set_last_cursor(win);
  	buflist_setfpos(buf, win,
  		    win->w_cursor.lnum == 1 ? 0 : win->w_cursor.lnum,
  		    win->w_cursor.col, TRUE);
      }
  
  #ifdef FEAT_AUTOCMD
      /* When the buffer is no longer in a window, trigger BufWinLeave */
      if (buf->b_nwindows == 1)
      {
  	buf->b_closing = TRUE;
  	apply_autocmds(EVENT_BUFWINLEAVE, buf->b_fname, buf->b_fname,
  								  FALSE, buf);
  	if (!buf_valid(buf))
  	{
  	    /* Autocommands deleted the buffer. */
  aucmd_abort:
  	    EMSG(_(e_auabort));
  	    return;
  	}
  	buf->b_closing = FALSE;
  	if (abort_if_last && one_window())
  	    /* Autocommands made this the only window. */
  	    goto aucmd_abort;
  
  	/* When the buffer becomes hidden, but is not unloaded, trigger
  	 * BufHidden */
  	if (!unload_buf)
  	{
  	    buf->b_closing = TRUE;
  	    apply_autocmds(EVENT_BUFHIDDEN, buf->b_fname, buf->b_fname,
  								  FALSE, buf);
  	    if (!buf_valid(buf))
  		/* Autocommands deleted the buffer. */
  		goto aucmd_abort;
  	    buf->b_closing = FALSE;
  	    if (abort_if_last && one_window())
  		/* Autocommands made this the only window. */
  		goto aucmd_abort;
  	}
  # ifdef FEAT_EVAL
  	if (aborting())	    /* autocmds may abort script processing */
  	    return;
  # endif
      }
      nwindows = buf->b_nwindows;
  #endif
  
      /* decrease the link count from windows (unless not in any window) */
      if (buf->b_nwindows > 0)
  	--buf->b_nwindows;
  
      /* Return when a window is displaying the buffer or when it's not
       * unloaded. */
      if (buf->b_nwindows > 0 || !unload_buf)
  	return;
  
      /* Always remove the buffer when there is no file name. */
      if (buf->b_ffname == NULL)
  	del_buf = TRUE;
  
      /*
       * Free all things allocated for this buffer.
       * Also calls the "BufDelete" autocommands when del_buf is TRUE.
       */
  #ifdef FEAT_AUTOCMD
      /* Remember if we are closing the current buffer.  Restore the number of
       * windows, so that autocommands in buf_freeall() don't get confused. */
      is_curbuf = (buf == curbuf);
      buf->b_nwindows = nwindows;
  #endif
  
      buf_freeall(buf, (del_buf ? BFA_DEL : 0) + (wipe_buf ? BFA_WIPE : 0));
      if (
  #ifdef FEAT_WINDOWS
  	win_valid(win) &&
  #else
  	win != NULL &&
  #endif
  			  win->w_buffer == buf)
  	win->w_buffer = NULL;  /* make sure we don't use the buffer now */
  
  #ifdef FEAT_AUTOCMD
      /* Autocommands may have deleted the buffer. */
      if (!buf_valid(buf))
  	return;
  # ifdef FEAT_EVAL
      if (aborting())	    /* autocmds may abort script processing */
  	return;
  # endif
  
      /* Autocommands may have opened or closed windows for this buffer.
       * Decrement the count for the close we do here. */
      if (buf->b_nwindows > 0)
  	--buf->b_nwindows;
  
      /*
       * It's possible that autocommands change curbuf to the one being deleted.
       * This might cause the previous curbuf to be deleted unexpectedly.  But
       * in some cases it's OK to delete the curbuf, because a new one is
       * obtained anyway.  Therefore only return if curbuf changed to the
       * deleted buffer.
       */
      if (buf == curbuf && !is_curbuf)
  	return;
  #endif
  
      /* Change directories when the 'acd' option is set. */
      DO_AUTOCHDIR
  
      /*
       * Remove the buffer from the list.
       */
      if (wipe_buf)
      {
  #ifdef FEAT_SUN_WORKSHOP
  	if (usingSunWorkShop)
  	    workshop_file_closed_lineno((char *)buf->b_ffname,
  			(int)buf->b_last_cursor.lnum);
  #endif
  	vim_free(buf->b_ffname);
  	vim_free(buf->b_sfname);
  	if (buf->b_prev == NULL)
  	    firstbuf = buf->b_next;
  	else
  	    buf->b_prev->b_next = buf->b_next;
  	if (buf->b_next == NULL)
  	    lastbuf = buf->b_prev;
  	else
  	    buf->b_next->b_prev = buf->b_prev;
  	free_buffer(buf);
      }
      else
      {
  	if (del_buf)
  	{
  	    /* Free all internal variables and reset option values, to make
  	     * ":bdel" compatible with Vim 5.7. */
  	    free_buffer_stuff(buf, TRUE);
  
  	    /* Make it look like a new buffer. */
  	    buf->b_flags = BF_CHECK_RO | BF_NEVERLOADED;
  
  	    /* Init the options when loaded again. */
  	    buf->b_p_initialized = FALSE;
  	}
  	buf_clear_file(buf);
  	if (del_buf)
  	    buf->b_p_bl = FALSE;
      }
  }
  
  /*
   * Make buffer not contain a file.
   */
      void
  buf_clear_file(buf)
      buf_T	*buf;
  {
      buf->b_ml.ml_line_count = 1;
      unchanged(buf, TRUE);
  #ifndef SHORT_FNAME
      buf->b_shortname = FALSE;
  #endif
      buf->b_p_eol = TRUE;
      buf->b_start_eol = TRUE;
  #ifdef FEAT_MBYTE
      buf->b_p_bomb = FALSE;
      buf->b_start_bomb = FALSE;
  #endif
      buf->b_ml.ml_mfp = NULL;
      buf->b_ml.ml_flags = ML_EMPTY;		/* empty buffer */
  #ifdef FEAT_NETBEANS_INTG
      netbeans_deleted_all_lines(buf);
  #endif
  }
  
  /*
   * buf_freeall() - free all things allocated for a buffer that are related to
   * the file.  flags:
   * BFA_DEL	  buffer is going to be deleted
   * BFA_WIPE	  buffer is going to be wiped out
   * BFA_KEEP_UNDO  do not free undo information
   */
      void
  buf_freeall(buf, flags)
      buf_T	*buf;
      int		flags;
  {
  #ifdef FEAT_AUTOCMD
      int		is_curbuf = (buf == curbuf);
  
      buf->b_closing = TRUE;
      apply_autocmds(EVENT_BUFUNLOAD, buf->b_fname, buf->b_fname, FALSE, buf);
      if (!buf_valid(buf))	    /* autocommands may delete the buffer */
  	return;
      if ((flags & BFA_DEL) && buf->b_p_bl)
      {
  	apply_autocmds(EVENT_BUFDELETE, buf->b_fname, buf->b_fname, FALSE, buf);
  	if (!buf_valid(buf))	    /* autocommands may delete the buffer */
  	    return;
      }
      if (flags & BFA_WIPE)
      {
  	apply_autocmds(EVENT_BUFWIPEOUT, buf->b_fname, buf->b_fname,
  								  FALSE, buf);
  	if (!buf_valid(buf))	    /* autocommands may delete the buffer */
  	    return;
      }
      buf->b_closing = FALSE;
  # ifdef FEAT_EVAL
      if (aborting())	    /* autocmds may abort script processing */
  	return;
  # endif
  
      /*
       * It's possible that autocommands change curbuf to the one being deleted.
       * This might cause curbuf to be deleted unexpectedly.  But in some cases
       * it's OK to delete the curbuf, because a new one is obtained anyway.
       * Therefore only return if curbuf changed to the deleted buffer.
       */
      if (buf == curbuf && !is_curbuf)
  	return;
  #endif
  #ifdef FEAT_DIFF
      diff_buf_delete(buf);	    /* Can't use 'diff' for unloaded buffer. */
  #endif
  #ifdef FEAT_SYN_HL
      /* Remove any ownsyntax, unless exiting. */
      if (firstwin != NULL && curwin->w_buffer == buf)
  	reset_synblock(curwin);
  #endif
  
  #ifdef FEAT_FOLDING
      /* No folds in an empty buffer. */
  # ifdef FEAT_WINDOWS
      {
  	win_T		*win;
  	tabpage_T	*tp;
  
  	FOR_ALL_TAB_WINDOWS(tp, win)
  	    if (win->w_buffer == buf)
  		clearFolding(win);
      }
  # else
      if (curwin->w_buffer == buf)
  	clearFolding(curwin);
  # endif
  #endif
  
  #ifdef FEAT_TCL
      tcl_buffer_free(buf);
  #endif
      ml_close(buf, TRUE);	    /* close and delete the memline/memfile */
      buf->b_ml.ml_line_count = 0;    /* no lines in buffer */
      if ((flags & BFA_KEEP_UNDO) == 0)
      {
  	u_blockfree(buf);	    /* free the memory allocated for undo */
  	u_clearall(buf);	    /* reset all undo information */
      }
  #ifdef FEAT_SYN_HL
      syntax_clear(&buf->b_s);	    /* reset syntax info */
  #endif
      buf->b_flags &= ~BF_READERR;    /* a read error is no longer relevant */
  }
  
  /*
   * Free a buffer structure and the things it contains related to the buffer
   * itself (not the file, that must have been done already).
   */
      static void
  free_buffer(buf)
      buf_T	*buf;
  {
      free_buffer_stuff(buf, TRUE);
  #ifdef FEAT_LUA
      lua_buffer_free(buf);
  #endif
  #ifdef FEAT_MZSCHEME
      mzscheme_buffer_free(buf);
  #endif
  #ifdef FEAT_PERL
      perl_buf_free(buf);
  #endif
  #ifdef FEAT_PYTHON
      python_buffer_free(buf);
  #endif
  #ifdef FEAT_PYTHON3
      python3_buffer_free(buf);
  #endif
  #ifdef FEAT_RUBY
      ruby_buffer_free(buf);
  #endif
  #ifdef FEAT_AUTOCMD
      aubuflocal_remove(buf);
  #endif
      vim_free(buf);
  }
  
  /*
   * Free stuff in the buffer for ":bdel" and when wiping out the buffer.
   */
      static void
  free_buffer_stuff(buf, free_options)
      buf_T	*buf;
      int		free_options;		/* free options as well */
  {
      if (free_options)
      {
  	clear_wininfo(buf);		/* including window-local options */
  	free_buf_options(buf, TRUE);
  #ifdef FEAT_SPELL
  	ga_clear(&buf->b_s.b_langp);
  #endif
      }
  #ifdef FEAT_EVAL
      vars_clear(&buf->b_vars.dv_hashtab); /* free all internal variables */
      hash_init(&buf->b_vars.dv_hashtab);
  #endif
  #ifdef FEAT_USR_CMDS
      uc_clear(&buf->b_ucmds);		/* clear local user commands */
  #endif
  #ifdef FEAT_SIGNS
      buf_delete_signs(buf);		/* delete any signs */
  #endif
  #ifdef FEAT_NETBEANS_INTG
      netbeans_file_killed(buf);
  #endif
  #ifdef FEAT_LOCALMAP
      map_clear_int(buf, MAP_ALL_MODES, TRUE, FALSE);  /* clear local mappings */
      map_clear_int(buf, MAP_ALL_MODES, TRUE, TRUE);   /* clear local abbrevs */
  #endif
  #ifdef FEAT_MBYTE
      vim_free(buf->b_start_fenc);
      buf->b_start_fenc = NULL;
  #endif
  }
  
  /*
   * Free the b_wininfo list for buffer "buf".
   */
      static void
  clear_wininfo(buf)
      buf_T	*buf;
  {
      wininfo_T	*wip;
  
      while (buf->b_wininfo != NULL)
      {
  	wip = buf->b_wininfo;
  	buf->b_wininfo = wip->wi_next;
  	if (wip->wi_optset)
  	{
  	    clear_winopt(&wip->wi_opt);
  #ifdef FEAT_FOLDING
  	    deleteFoldRecurse(&wip->wi_folds);
  #endif
  	}
  	vim_free(wip);
      }
  }
  
  #if defined(FEAT_LISTCMDS) || defined(PROTO)
  /*
   * Go to another buffer.  Handles the result of the ATTENTION dialog.
   */
      void
  goto_buffer(eap, start, dir, count)
      exarg_T	*eap;
      int		start;
      int		dir;
      int		count;
  {
  # if defined(FEAT_WINDOWS) && defined(HAS_SWAP_EXISTS_ACTION)
      buf_T	*old_curbuf = curbuf;
  
      swap_exists_action = SEA_DIALOG;
  # endif
      (void)do_buffer(*eap->cmd == 's' ? DOBUF_SPLIT : DOBUF_GOTO,
  					     start, dir, count, eap->forceit);
  # if defined(FEAT_WINDOWS) && defined(HAS_SWAP_EXISTS_ACTION)
      if (swap_exists_action == SEA_QUIT && *eap->cmd == 's')
      {
  #  if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  	cleanup_T   cs;
  
  	/* Reset the error/interrupt/exception state here so that
  	 * aborting() returns FALSE when closing a window. */
  	enter_cleanup(&cs);
  #  endif
  
  	/* Quitting means closing the split window, nothing else. */
  	win_close(curwin, TRUE);
  	swap_exists_action = SEA_NONE;
  	swap_exists_did_quit = TRUE;
  
  #  if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  	/* Restore the error/interrupt/exception state if not discarded by a
  	 * new aborting error, interrupt, or uncaught exception. */
  	leave_cleanup(&cs);
  #  endif
      }
      else
  	handle_swap_exists(old_curbuf);
  # endif
  }
  #endif
  
  #if defined(HAS_SWAP_EXISTS_ACTION) || defined(PROTO)
  /*
   * Handle the situation of swap_exists_action being set.
   * It is allowed for "old_curbuf" to be NULL or invalid.
   */
      void
  handle_swap_exists(old_curbuf)
      buf_T	*old_curbuf;
  {
  # if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
      cleanup_T	cs;
  # endif
  
      if (swap_exists_action == SEA_QUIT)
      {
  # if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  	/* Reset the error/interrupt/exception state here so that
  	 * aborting() returns FALSE when closing a buffer. */
  	enter_cleanup(&cs);
  # endif
  
  	/* User selected Quit at ATTENTION prompt.  Go back to previous
  	 * buffer.  If that buffer is gone or the same as the current one,
  	 * open a new, empty buffer. */
  	swap_exists_action = SEA_NONE;	/* don't want it again */
  	swap_exists_did_quit = TRUE;
  	close_buffer(curwin, curbuf, DOBUF_UNLOAD, FALSE);
  	if (!buf_valid(old_curbuf) || old_curbuf == curbuf)
  	    old_curbuf = buflist_new(NULL, NULL, 1L, BLN_CURBUF | BLN_LISTED);
  	if (old_curbuf != NULL)
  	    enter_buffer(old_curbuf);
  	/* If "old_curbuf" is NULL we are in big trouble here... */
  
  # if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  	/* Restore the error/interrupt/exception state if not discarded by a
  	 * new aborting error, interrupt, or uncaught exception. */
  	leave_cleanup(&cs);
  # endif
      }
      else if (swap_exists_action == SEA_RECOVER)
      {
  # if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  	/* Reset the error/interrupt/exception state here so that
  	 * aborting() returns FALSE when closing a buffer. */
  	enter_cleanup(&cs);
  # endif
  
  	/* User selected Recover at ATTENTION prompt. */
  	msg_scroll = TRUE;
  	ml_recover();
  	MSG_PUTS("\n");	/* don't overwrite the last message */
  	cmdline_row = msg_row;
  	do_modelines(0);
  
  # if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  	/* Restore the error/interrupt/exception state if not discarded by a
  	 * new aborting error, interrupt, or uncaught exception. */
  	leave_cleanup(&cs);
  # endif
      }
      swap_exists_action = SEA_NONE;
  }
  #endif
  
  #if defined(FEAT_LISTCMDS) || defined(PROTO)
  /*
   * do_bufdel() - delete or unload buffer(s)
   *
   * addr_count == 0: ":bdel" - delete current buffer
   * addr_count == 1: ":N bdel" or ":bdel N [N ..]" - first delete
   *		    buffer "end_bnr", then any other arguments.
   * addr_count == 2: ":N,N bdel" - delete buffers in range
   *
   * command can be DOBUF_UNLOAD (":bunload"), DOBUF_WIPE (":bwipeout") or
   * DOBUF_DEL (":bdel")
   *
   * Returns error message or NULL
   */
      char_u *
  do_bufdel(command, arg, addr_count, start_bnr, end_bnr, forceit)
      int		command;
      char_u	*arg;		/* pointer to extra arguments */
      int		addr_count;
      int		start_bnr;	/* first buffer number in a range */
      int		end_bnr;	/* buffer nr or last buffer nr in a range */
      int		forceit;
  {
      int		do_current = 0;	/* delete current buffer? */
      int		deleted = 0;	/* number of buffers deleted */
      char_u	*errormsg = NULL; /* return value */
      int		bnr;		/* buffer number */
      char_u	*p;
  
      if (addr_count == 0)
      {
  	(void)do_buffer(command, DOBUF_CURRENT, FORWARD, 0, forceit);
      }
      else
      {
  	if (addr_count == 2)
  	{
  	    if (*arg)		/* both range and argument is not allowed */
  		return (char_u *)_(e_trailing);
  	    bnr = start_bnr;
  	}
  	else	/* addr_count == 1 */
  	    bnr = end_bnr;
  
  	for ( ;!got_int; ui_breakcheck())
  	{
  	    /*
  	     * delete the current buffer last, otherwise when the
  	     * current buffer is deleted, the next buffer becomes
  	     * the current one and will be loaded, which may then
  	     * also be deleted, etc.
  	     */
  	    if (bnr == curbuf->b_fnum)
  		do_current = bnr;
  	    else if (do_buffer(command, DOBUF_FIRST, FORWARD, (int)bnr,
  							       forceit) == OK)
  		++deleted;
  
  	    /*
  	     * find next buffer number to delete/unload
  	     */
  	    if (addr_count == 2)
  	    {
  		if (++bnr > end_bnr)
  		    break;
  	    }
  	    else    /* addr_count == 1 */
  	    {
  		arg = skipwhite(arg);
  		if (*arg == NUL)
  		    break;
  		if (!VIM_ISDIGIT(*arg))
  		{
  		    p = skiptowhite_esc(arg);
  		    bnr = buflist_findpat(arg, p, command == DOBUF_WIPE, FALSE);
  		    if (bnr < 0)	    /* failed */
  			break;
  		    arg = p;
  		}
  		else
  		    bnr = getdigits(&arg);
  	    }
  	}
  	if (!got_int && do_current && do_buffer(command, DOBUF_FIRST,
  					  FORWARD, do_current, forceit) == OK)
  	    ++deleted;
  
  	if (deleted == 0)
  	{
  	    if (command == DOBUF_UNLOAD)
  		STRCPY(IObuff, _("E515: No buffers were unloaded"));
  	    else if (command == DOBUF_DEL)
  		STRCPY(IObuff, _("E516: No buffers were deleted"));
  	    else
  		STRCPY(IObuff, _("E517: No buffers were wiped out"));
  	    errormsg = IObuff;
  	}
  	else if (deleted >= p_report)
  	{
  	    if (command == DOBUF_UNLOAD)
  	    {
  		if (deleted == 1)
  		    MSG(_("1 buffer unloaded"));
  		else
  		    smsg((char_u *)_("%d buffers unloaded"), deleted);
  	    }
  	    else if (command == DOBUF_DEL)
  	    {
  		if (deleted == 1)
  		    MSG(_("1 buffer deleted"));
  		else
  		    smsg((char_u *)_("%d buffers deleted"), deleted);
  	    }
  	    else
  	    {
  		if (deleted == 1)
  		    MSG(_("1 buffer wiped out"));
  		else
  		    smsg((char_u *)_("%d buffers wiped out"), deleted);
  	    }
  	}
      }
  
  
      return errormsg;
  }
  
  /*
   * Implementation of the commands for the buffer list.
   *
   * action == DOBUF_GOTO	    go to specified buffer
   * action == DOBUF_SPLIT    split window and go to specified buffer
   * action == DOBUF_UNLOAD   unload specified buffer(s)
   * action == DOBUF_DEL	    delete specified buffer(s) from buffer list
   * action == DOBUF_WIPE	    delete specified buffer(s) really
   *
   * start == DOBUF_CURRENT   go to "count" buffer from current buffer
   * start == DOBUF_FIRST	    go to "count" buffer from first buffer
   * start == DOBUF_LAST	    go to "count" buffer from last buffer
   * start == DOBUF_MOD	    go to "count" modified buffer from current buffer
   *
   * Return FAIL or OK.
   */
      int
  do_buffer(action, start, dir, count, forceit)
      int		action;
      int		start;
      int		dir;		/* FORWARD or BACKWARD */
      int		count;		/* buffer number or number of buffers */
      int		forceit;	/* TRUE for :...! */
  {
      buf_T	*buf;
      buf_T	*bp;
      int		unload = (action == DOBUF_UNLOAD || action == DOBUF_DEL
  						     || action == DOBUF_WIPE);
  
      switch (start)
      {
  	case DOBUF_FIRST:   buf = firstbuf; break;
  	case DOBUF_LAST:    buf = lastbuf;  break;
  	default:	    buf = curbuf;   break;
      }
      if (start == DOBUF_MOD)	    /* find next modified buffer */
      {
  	while (count-- > 0)
  	{
  	    do
  	    {
  		buf = buf->b_next;
  		if (buf == NULL)
  		    buf = firstbuf;
  	    }
  	    while (buf != curbuf && !bufIsChanged(buf));
  	}
  	if (!bufIsChanged(buf))
  	{
  	    EMSG(_("E84: No modified buffer found"));
  	    return FAIL;
  	}
      }
      else if (start == DOBUF_FIRST && count) /* find specified buffer number */
      {
  	while (buf != NULL && buf->b_fnum != count)
  	    buf = buf->b_next;
      }
      else
      {
  	bp = NULL;
  	while (count > 0 || (!unload && !buf->b_p_bl && bp != buf))
  	{
  	    /* remember the buffer where we start, we come back there when all
  	     * buffers are unlisted. */
  	    if (bp == NULL)
  		bp = buf;
  	    if (dir == FORWARD)
  	    {
  		buf = buf->b_next;
  		if (buf == NULL)
  		    buf = firstbuf;
  	    }
  	    else
  	    {
  		buf = buf->b_prev;
  		if (buf == NULL)
  		    buf = lastbuf;
  	    }
  	    /* don't count unlisted buffers */
  	    if (unload || buf->b_p_bl)
  	    {
  		 --count;
  		 bp = NULL;	/* use this buffer as new starting point */
  	    }
  	    if (bp == buf)
  	    {
  		/* back where we started, didn't find anything. */
  		EMSG(_("E85: There is no listed buffer"));
  		return FAIL;
  	    }
  	}
      }
  
      if (buf == NULL)	    /* could not find it */
      {
  	if (start == DOBUF_FIRST)
  	{
  	    /* don't warn when deleting */
  	    if (!unload)
  		EMSGN(_("E86: Buffer %ld does not exist"), count);
  	}
  	else if (dir == FORWARD)
  	    EMSG(_("E87: Cannot go beyond last buffer"));
  	else
  	    EMSG(_("E88: Cannot go before first buffer"));
  	return FAIL;
      }
  
  #ifdef FEAT_GUI
      need_mouse_correct = TRUE;
  #endif
  
  #ifdef FEAT_LISTCMDS
      /*
       * delete buffer buf from memory and/or the list
       */
      if (unload)
      {
  	int	forward;
  	int	retval;
  
  	/* When unloading or deleting a buffer that's already unloaded and
  	 * unlisted: fail silently. */
  	if (action != DOBUF_WIPE && buf->b_ml.ml_mfp == NULL && !buf->b_p_bl)
  	    return FAIL;
  
  	if (!forceit && bufIsChanged(buf))
  	{
  #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
  	    if ((p_confirm || cmdmod.confirm) && p_write)
  	    {
  		dialog_changed(buf, FALSE);
  # ifdef FEAT_AUTOCMD
  		if (!buf_valid(buf))
  		    /* Autocommand deleted buffer, oops!  It's not changed
  		     * now. */
  		    return FAIL;
  # endif
  		/* If it's still changed fail silently, the dialog already
  		 * mentioned why it fails. */
  		if (bufIsChanged(buf))
  		    return FAIL;
  	    }
  	    else
  #endif
  	    {
  		EMSGN(_("E89: No write since last change for buffer %ld (add ! to override)"),
  								 buf->b_fnum);
  		return FAIL;
  	    }
  	}
  
  	/*
  	 * If deleting the last (listed) buffer, make it empty.
  	 * The last (listed) buffer cannot be unloaded.
  	 */
  	for (bp = firstbuf; bp != NULL; bp = bp->b_next)
  	    if (bp->b_p_bl && bp != buf)
  		break;
  	if (bp == NULL && buf == curbuf)
  	{
  	    if (action == DOBUF_UNLOAD)
  	    {
  		EMSG(_("E90: Cannot unload last buffer"));
  		return FAIL;
  	    }
  
  	    /* Close any other windows on this buffer, then make it empty. */
  #ifdef FEAT_WINDOWS
  	    close_windows(buf, TRUE);
  #endif
  	    setpcmark();
  	    retval = do_ecmd(0, NULL, NULL, NULL, ECMD_ONE,
  					  forceit ? ECMD_FORCEIT : 0, curwin);
  
  	    /*
  	     * do_ecmd() may create a new buffer, then we have to delete
  	     * the old one.  But do_ecmd() may have done that already, check
  	     * if the buffer still exists.
  	     */
  	    if (buf != curbuf && buf_valid(buf) && buf->b_nwindows == 0)
  		close_buffer(NULL, buf, action, FALSE);
  	    return retval;
  	}
  
  #ifdef FEAT_WINDOWS
  	/*
  	 * If the deleted buffer is the current one, close the current window
  	 * (unless it's the only window).  Repeat this so long as we end up in
  	 * a window with this buffer.
  	 */
  	while (buf == curbuf
  # ifdef FEAT_AUTOCMD
  		   && !(curwin->w_closing || curwin->w_buffer->b_closing)
  # endif
  		   && (firstwin != lastwin || first_tabpage->tp_next != NULL))
  	    win_close(curwin, FALSE);
  #endif
  
  	/*
  	 * If the buffer to be deleted is not the current one, delete it here.
  	 */
  	if (buf != curbuf)
  	{
  #ifdef FEAT_WINDOWS
  	    close_windows(buf, FALSE);
  #endif
  	    if (buf != curbuf && buf_valid(buf) && buf->b_nwindows <= 0)
  		close_buffer(NULL, buf, action, FALSE);
  	    return OK;
  	}
  
  	/*
  	 * Deleting the current buffer: Need to find another buffer to go to.
  	 * There must be another, otherwise it would have been handled above.
  	 * First use au_new_curbuf, if it is valid.
  	 * Then prefer the buffer we most recently visited.
  	 * Else try to find one that is loaded, after the current buffer,
  	 * then before the current buffer.
  	 * Finally use any buffer.
  	 */
  	buf = NULL;	/* selected buffer */
  	bp = NULL;	/* used when no loaded buffer found */
  #ifdef FEAT_AUTOCMD
  	if (au_new_curbuf != NULL && buf_valid(au_new_curbuf))
  	    buf = au_new_curbuf;
  # ifdef FEAT_JUMPLIST
  	else
  # endif
  #endif
  #ifdef FEAT_JUMPLIST
  	    if (curwin->w_jumplistlen > 0)
  	{
  	    int     jumpidx;
  
  	    jumpidx = curwin->w_jumplistidx - 1;
  	    if (jumpidx < 0)
  		jumpidx = curwin->w_jumplistlen - 1;
  
  	    forward = jumpidx;
  	    while (jumpidx != curwin->w_jumplistidx)
  	    {
  		buf = buflist_findnr(curwin->w_jumplist[jumpidx].fmark.fnum);
  		if (buf != NULL)
  		{
  		    if (buf == curbuf || !buf->b_p_bl)
  			buf = NULL;	/* skip current and unlisted bufs */
  		    else if (buf->b_ml.ml_mfp == NULL)
  		    {
  			/* skip unloaded buf, but may keep it for later */
  			if (bp == NULL)
  			    bp = buf;
  			buf = NULL;
  		    }
  		}
  		if (buf != NULL)   /* found a valid buffer: stop searching */
  		    break;
  		/* advance to older entry in jump list */
  		if (!jumpidx && curwin->w_jumplistidx == curwin->w_jumplistlen)
  		    break;
  		if (--jumpidx < 0)
  		    jumpidx = curwin->w_jumplistlen - 1;
  		if (jumpidx == forward)		/* List exhausted for sure */
  		    break;
  	    }
  	}
  #endif
  
  	if (buf == NULL)	/* No previous buffer, Try 2'nd approach */
  	{
  	    forward = TRUE;
  	    buf = curbuf->b_next;
  	    for (;;)
  	    {
  		if (buf == NULL)
  		{
  		    if (!forward)	/* tried both directions */
  			break;
  		    buf = curbuf->b_prev;
  		    forward = FALSE;
  		    continue;
  		}
  		/* in non-help buffer, try to skip help buffers, and vv */
  		if (buf->b_help == curbuf->b_help && buf->b_p_bl)
  		{
  		    if (buf->b_ml.ml_mfp != NULL)   /* found loaded buffer */
  			break;
  		    if (bp == NULL)	/* remember unloaded buf for later */
  			bp = buf;
  		}
  		if (forward)
  		    buf = buf->b_next;
  		else
  		    buf = buf->b_prev;
  	    }
  	}
  	if (buf == NULL)	/* No loaded buffer, use unloaded one */
  	    buf = bp;
  	if (buf == NULL)	/* No loaded buffer, find listed one */
  	{
  	    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
  		if (buf->b_p_bl && buf != curbuf)
  		    break;
  	}
  	if (buf == NULL)	/* Still no buffer, just take one */
  	{
  	    if (curbuf->b_next != NULL)
  		buf = curbuf->b_next;
  	    else
  		buf = curbuf->b_prev;
  	}
      }
  
      /*
       * make buf current buffer
       */
      if (action == DOBUF_SPLIT)	    /* split window first */
      {
  # ifdef FEAT_WINDOWS
  	/* If 'switchbuf' contains "useopen": jump to first window containing
  	 * "buf" if one exists */
  	if ((swb_flags & SWB_USEOPEN) && buf_jump_open_win(buf))
  	    return OK;
  	/* If 'switchbuf' contains "usetab": jump to first window in any tab
  	 * page containing "buf" if one exists */
  	if ((swb_flags & SWB_USETAB) && buf_jump_open_tab(buf))
  	    return OK;
  	if (win_split(0, 0) == FAIL)
  # endif
  	    return FAIL;
      }
  #endif
  
      /* go to current buffer - nothing to do */
      if (buf == curbuf)
  	return OK;
  
      /*
       * Check if the current buffer may be abandoned.
       */
      if (action == DOBUF_GOTO && !can_abandon(curbuf, forceit))
      {
  #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
  	if ((p_confirm || cmdmod.confirm) && p_write)
  	{
  	    dialog_changed(curbuf, FALSE);
  # ifdef FEAT_AUTOCMD
  	    if (!buf_valid(buf))
  		/* Autocommand deleted buffer, oops! */
  		return FAIL;
  # endif
  	}
  	if (bufIsChanged(curbuf))
  #endif
  	{
  	    EMSG(_(e_nowrtmsg));
  	    return FAIL;
  	}
      }
  
      /* Go to the other buffer. */
      set_curbuf(buf, action);
  
  #if defined(FEAT_LISTCMDS) \
  	&& (defined(FEAT_SCROLLBIND) || defined(FEAT_CURSORBIND))
      if (action == DOBUF_SPLIT)
      {
  	RESET_BINDING(curwin);	/* reset 'scrollbind' and 'cursorbind' */
      }
  #endif
  
  #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
      if (aborting())	    /* autocmds may abort script processing */
  	return FAIL;
  #endif
  
      return OK;
  }
  
  #endif /* FEAT_LISTCMDS */
  
  /*
   * Set current buffer to "buf".  Executes autocommands and closes current
   * buffer.  "action" tells how to close the current buffer:
   * DOBUF_GOTO	    free or hide it
   * DOBUF_SPLIT	    nothing
   * DOBUF_UNLOAD	    unload it
   * DOBUF_DEL	    delete it
   * DOBUF_WIPE	    wipe it out
   */
      void
  set_curbuf(buf, action)
      buf_T	*buf;
      int		action;
  {
      buf_T	*prevbuf;
      int		unload = (action == DOBUF_UNLOAD || action == DOBUF_DEL
  						     || action == DOBUF_WIPE);
  
      setpcmark();
      if (!cmdmod.keepalt)
  	curwin->w_alt_fnum = curbuf->b_fnum; /* remember alternate file */
      buflist_altfpos(curwin);			 /* remember curpos */
  
  #ifdef FEAT_VISUAL
      /* Don't restart Select mode after switching to another buffer. */
      VIsual_reselect = FALSE;
  #endif
  
      /* close_windows() or apply_autocmds() may change curbuf */
      prevbuf = curbuf;
  
  #ifdef FEAT_AUTOCMD
      apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf);
  # ifdef FEAT_EVAL
      if (buf_valid(prevbuf) && !aborting())
  # else
      if (buf_valid(prevbuf))
  # endif
  #endif
      {
  #ifdef FEAT_SYN_HL
  	if (prevbuf == curwin->w_buffer)
  	    reset_synblock(curwin);
  #endif
  #ifdef FEAT_WINDOWS
  	if (unload)
  	    close_windows(prevbuf, FALSE);
  #endif
  #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  	if (buf_valid(prevbuf) && !aborting())
  #else
  	if (buf_valid(prevbuf))
  #endif
  	{
  #ifdef FEAT_WINDOWS
  	    win_T  *previouswin = curwin;
  #endif
  	    if (prevbuf == curbuf)
  		u_sync(FALSE);
  	    close_buffer(prevbuf == curwin->w_buffer ? curwin : NULL, prevbuf,
  		    unload ? action : (action == DOBUF_GOTO
  			&& !P_HID(prevbuf)
  			&& !bufIsChanged(prevbuf)) ? DOBUF_UNLOAD : 0, FALSE);
  #ifdef FEAT_WINDOWS
  	    if (curwin != previouswin && win_valid(previouswin))
  	      /* autocommands changed curwin, Grr! */
  	      curwin = previouswin;
  #endif
  	}
      }
  #ifdef FEAT_AUTOCMD
      /* An autocommand may have deleted "buf", already entered it (e.g., when
       * it did ":bunload") or aborted the script processing!
       * If curwin->w_buffer is null, enter_buffer() will make it valid again */
      if ((buf_valid(buf) && buf != curbuf
  # ifdef FEAT_EVAL
  	    && !aborting()
  # endif
  # ifdef FEAT_WINDOWS
  	 ) || curwin->w_buffer == NULL
  # endif
         )
  #endif
  	enter_buffer(buf);
  }
  
  /*
   * Enter a new current buffer.
   * Old curbuf must have been abandoned already!
   */
      void
  enter_buffer(buf)
      buf_T	*buf;
  {
      /* Copy buffer and window local option values.  Not for a help buffer. */
      buf_copy_options(buf, BCO_ENTER | BCO_NOHELP);
      if (!buf->b_help)
  	get_winopts(buf);
  #ifdef FEAT_FOLDING
      else
  	/* Remove all folds in the window. */
  	clearFolding(curwin);
      foldUpdateAll(curwin);	/* update folds (later). */
  #endif
  
      /* Get the buffer in the current window. */
      curwin->w_buffer = buf;
      curbuf = buf;
      ++curbuf->b_nwindows;
  
  #ifdef FEAT_DIFF
      if (curwin->w_p_diff)
  	diff_buf_add(curbuf);
  #endif
  
  #ifdef FEAT_SYN_HL
      curwin->w_s = &(buf->b_s);
  #endif
  
      /* Cursor on first line by default. */
      curwin->w_cursor.lnum = 1;
      curwin->w_cursor.col = 0;
  #ifdef FEAT_VIRTUALEDIT
      curwin->w_cursor.coladd = 0;
  #endif
      curwin->w_set_curswant = TRUE;
  #ifdef FEAT_AUTOCMD
      curwin->w_topline_was_set = FALSE;
  #endif
  
      /* mark cursor position as being invalid */
      curwin->w_valid = 0;
  
      /* Make sure the buffer is loaded. */
      if (curbuf->b_ml.ml_mfp == NULL)	/* need to load the file */
      {
  #ifdef FEAT_AUTOCMD
  	/* If there is no filetype, allow for detecting one.  Esp. useful for
  	 * ":ball" used in a autocommand.  If there already is a filetype we
  	 * might prefer to keep it. */
  	if (*curbuf->b_p_ft == NUL)
  	    did_filetype = FALSE;
  #endif
  
  	open_buffer(FALSE, NULL, 0);
      }
      else
      {
  	if (!msg_silent)
  	    need_fileinfo = TRUE;	/* display file info after redraw */
  	(void)buf_check_timestamp(curbuf, FALSE); /* check if file changed */
  #ifdef FEAT_AUTOCMD
  	curwin->w_topline = 1;
  # ifdef FEAT_DIFF
  	curwin->w_topfill = 0;
  # endif
  	apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf);
  	apply_autocmds(EVENT_BUFWINENTER, NULL, NULL, FALSE, curbuf);
  #endif
      }
  
      /* If autocommands did not change the cursor position, restore cursor lnum
       * and possibly cursor col. */
      if (curwin->w_cursor.lnum == 1 && inindent(0))
  	buflist_getfpos();
  
      check_arg_idx(curwin);		/* check for valid arg_idx */
  #ifdef FEAT_TITLE
      maketitle();
  #endif
  #ifdef FEAT_AUTOCMD
  	/* when autocmds didn't change it */
      if (curwin->w_topline == 1 && !curwin->w_topline_was_set)
  #endif
  	scroll_cursor_halfway(FALSE);	/* redisplay at correct position */
  
  #ifdef FEAT_NETBEANS_INTG
      /* Send fileOpened event because we've changed buffers. */
      netbeans_file_activated(curbuf);
  #endif
  
      /* Change directories when the 'acd' option is set. */
      DO_AUTOCHDIR
  
  #ifdef FEAT_KEYMAP
      if (curbuf->b_kmap_state & KEYMAP_INIT)
  	(void)keymap_init();
  #endif
  #ifdef FEAT_SPELL
      /* May need to set the spell language.  Can only do this after the buffer
       * has been properly setup. */
      if (!curbuf->b_help && curwin->w_p_spell && *curwin->w_s->b_p_spl != NUL)
  	(void)did_set_spelllang(curwin);
  #endif
  
      redraw_later(NOT_VALID);
  }
  
  #if defined(FEAT_AUTOCHDIR) || defined(PROTO)
  /*
   * Change to the directory of the current buffer.
   */
      void
  do_autochdir()
  {
      if (curbuf->b_ffname != NULL && vim_chdirfile(curbuf->b_ffname) == OK)
  	shorten_fnames(TRUE);
  }
  #endif
  
  /*
   * functions for dealing with the buffer list
   */
  
  /*
   * Add a file name to the buffer list.  Return a pointer to the buffer.
   * If the same file name already exists return a pointer to that buffer.
   * If it does not exist, or if fname == NULL, a new entry is created.
   * If (flags & BLN_CURBUF) is TRUE, may use current buffer.
   * If (flags & BLN_LISTED) is TRUE, add new buffer to buffer list.
   * If (flags & BLN_DUMMY) is TRUE, don't count it as a real buffer.
   * This is the ONLY way to create a new buffer.
   */
  static int  top_file_num = 1;		/* highest file number */
  
      buf_T *
  buflist_new(ffname, sfname, lnum, flags)
      char_u	*ffname;	/* full path of fname or relative */
      char_u	*sfname;	/* short fname or NULL */
      linenr_T	lnum;		/* preferred cursor line */
      int		flags;		/* BLN_ defines */
  {
      buf_T	*buf;
  #ifdef UNIX
      struct stat	st;
  #endif
  
      fname_expand(curbuf, &ffname, &sfname);	/* will allocate ffname */
  
      /*
       * If file name already exists in the list, update the entry.
       */
  #ifdef UNIX
      /* On Unix we can use inode numbers when the file exists.  Works better
       * for hard links. */
      if (sfname == NULL || mch_stat((char *)sfname, &st) < 0)
  	st.st_dev = (dev_T)-1;
  #endif
      if (ffname != NULL && !(flags & BLN_DUMMY) && (buf =
  #ifdef UNIX
  		buflist_findname_stat(ffname, &st)
  #else
  		buflist_findname(ffname)
  #endif
  		) != NULL)
      {
  	vim_free(ffname);
  	if (lnum != 0)
  	    buflist_setfpos(buf, curwin, lnum, (colnr_T)0, FALSE);
  	/* copy the options now, if 'cpo' doesn't have 's' and not done
  	 * already */
  	buf_copy_options(buf, 0);
  	if ((flags & BLN_LISTED) && !buf->b_p_bl)
  	{
  	    buf->b_p_bl = TRUE;
  #ifdef FEAT_AUTOCMD
  	    if (!(flags & BLN_DUMMY))
  		apply_autocmds(EVENT_BUFADD, NULL, NULL, FALSE, buf);
  #endif
  	}
  	return buf;
      }
  
      /*
       * If the current buffer has no name and no contents, use the current
       * buffer.	Otherwise: Need to allocate a new buffer structure.
       *
       * This is the ONLY place where a new buffer structure is allocated!
       * (A spell file buffer is allocated in spell.c, but that's not a normal
       * buffer.)
       */
      buf = NULL;
      if ((flags & BLN_CURBUF)
  	    && curbuf != NULL
  	    && curbuf->b_ffname == NULL
  	    && curbuf->b_nwindows <= 1
  	    && (curbuf->b_ml.ml_mfp == NULL || bufempty()))
      {
  	buf = curbuf;
  #ifdef FEAT_AUTOCMD
  	/* It's like this buffer is deleted.  Watch out for autocommands that
  	 * change curbuf!  If that happens, allocate a new buffer anyway. */
  	if (curbuf->b_p_bl)
  	    apply_autocmds(EVENT_BUFDELETE, NULL, NULL, FALSE, curbuf);
  	if (buf == curbuf)
  	    apply_autocmds(EVENT_BUFWIPEOUT, NULL, NULL, FALSE, curbuf);
  # ifdef FEAT_EVAL
  	if (aborting())		/* autocmds may abort script processing */
  	    return NULL;
  # endif
  #endif
  #ifdef FEAT_QUICKFIX
  # ifdef FEAT_AUTOCMD
  	if (buf == curbuf)
  # endif
  	{
  	    /* Make sure 'bufhidden' and 'buftype' are empty */
  	    clear_string_option(&buf->b_p_bh);
  	    clear_string_option(&buf->b_p_bt);
  	}
  #endif
      }
      if (buf != curbuf || curbuf == NULL)
      {
  	buf = (buf_T *)alloc_clear((unsigned)sizeof(buf_T));
  	if (buf == NULL)
  	{
  	    vim_free(ffname);
  	    return NULL;
  	}
      }
  
      if (ffname != NULL)
      {
  	buf->b_ffname = ffname;
  	buf->b_sfname = vim_strsave(sfname);
      }
  
      clear_wininfo(buf);
      buf->b_wininfo = (wininfo_T *)alloc_clear((unsigned)sizeof(wininfo_T));
  
      if ((ffname != NULL && (buf->b_ffname == NULL || buf->b_sfname == NULL))
  	    || buf->b_wininfo == NULL)
      {
  	vim_free(buf->b_ffname);
  	buf->b_ffname = NULL;
  	vim_free(buf->b_sfname);
  	buf->b_sfname = NULL;
  	if (buf != curbuf)
  	    free_buffer(buf);
  	return NULL;
      }
  
      if (buf == curbuf)
      {
  	/* free all things allocated for this buffer */
  	buf_freeall(buf, 0);
  	if (buf != curbuf)	 /* autocommands deleted the buffer! */
  	    return NULL;
  #if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  	if (aborting())		/* autocmds may abort script processing */
  	    return NULL;
  #endif
  	/* buf->b_nwindows = 0; why was this here? */
  	free_buffer_stuff(buf, FALSE);	/* delete local variables et al. */
  #ifdef FEAT_KEYMAP
  	/* need to reload lmaps and set b:keymap_name */
  	curbuf->b_kmap_state |= KEYMAP_INIT;
  #endif
      }
      else
      {
  	/*
  	 * put new buffer at the end of the buffer list
  	 */
  	buf->b_next = NULL;
  	if (firstbuf == NULL)		/* buffer list is empty */
  	{
  	    buf->b_prev = NULL;
  	    firstbuf = buf;
  	}
  	else				/* append new buffer at end of list */
  	{
  	    lastbuf->b_next = buf;
  	    buf->b_prev = lastbuf;
  	}
  	lastbuf = buf;
  
  	buf->b_fnum = top_file_num++;
  	if (top_file_num < 0)		/* wrap around (may cause duplicates) */
  	{
  	    EMSG(_("W14: Warning: List of file names overflow"));
  	    if (emsg_silent == 0)
  	    {
  		out_flush();
  		ui_delay(3000L, TRUE);	/* make sure it is noticed */
  	    }
  	    top_file_num = 1;
  	}
  
  	/*
  	 * Always copy the options from the current buffer.
  	 */
  	buf_copy_options(buf, BCO_ALWAYS);
      }
  
      buf->b_wininfo->wi_fpos.lnum = lnum;
      buf->b_wininfo->wi_win = curwin;
  
  #ifdef FEAT_EVAL
      /* init b: variables */
      init_var_dict(&buf->b_vars, &buf->b_bufvar, VAR_SCOPE);
  #endif
  #ifdef FEAT_SYN_HL
      hash_init(&buf->b_s.b_keywtab);
      hash_init(&buf->b_s.b_keywtab_ic);
  #endif
  
      buf->b_fname = buf->b_sfname;
  #ifdef UNIX
      if (st.st_dev == (dev_T)-1)
  	buf->b_dev_valid = FALSE;
      else
      {
  	buf->b_dev_valid = TRUE;
  	buf->b_dev = st.st_dev;
  	buf->b_ino = st.st_ino;
      }
  #endif
      buf->b_u_synced = TRUE;
      buf->b_flags = BF_CHECK_RO | BF_NEVERLOADED;
      if (flags & BLN_DUMMY)
  	buf->b_flags |= BF_DUMMY;
      buf_clear_file(buf);
      clrallmarks(buf);			/* clear marks */
      fmarks_check_names(buf);		/* check file marks for this file */
      buf->b_p_bl = (flags & BLN_LISTED) ? TRUE : FALSE;	/* init 'buflisted' */
  #ifdef FEAT_AUTOCMD
      if (!(flags & BLN_DUMMY))
      {
  	apply_autocmds(EVENT_BUFNEW, NULL, NULL, FALSE, buf);
  	if (flags & BLN_LISTED)
  	    apply_autocmds(EVENT_BUFADD, NULL, NULL, FALSE, buf);
  # ifdef FEAT_EVAL
  	if (aborting())		/* autocmds may abort script processing */
  	    return NULL;
  # endif
      }
  #endif
  
      return buf;
  }
  
  /*
   * Free the memory for the options of a buffer.
   * If "free_p_ff" is TRUE also free 'fileformat', 'buftype' and
   * 'fileencoding'.
   */
      void
  free_buf_options(buf, free_p_ff)
      buf_T	*buf;
      int		free_p_ff;
  {
      if (free_p_ff)
      {
  #ifdef FEAT_MBYTE
  	clear_string_option(&buf->b_p_fenc);
  #endif
  	clear_string_option(&buf->b_p_ff);
  #ifdef FEAT_QUICKFIX
  	clear_string_option(&buf->b_p_bh);
  	clear_string_option(&buf->b_p_bt);
  #endif
      }
  #ifdef FEAT_FIND_ID
      clear_string_option(&buf->b_p_def);
      clear_string_option(&buf->b_p_inc);
  # ifdef FEAT_EVAL
      clear_string_option(&buf->b_p_inex);
  # endif
  #endif
  #if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
      clear_string_option(&buf->b_p_inde);
      clear_string_option(&buf->b_p_indk);
  #endif
  #if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
      clear_string_option(&buf->b_p_bexpr);
  #endif
  #if defined(FEAT_CRYPT)
      clear_string_option(&buf->b_p_cm);
  #endif
  #if defined(FEAT_EVAL)
      clear_string_option(&buf->b_p_fex);
  #endif
  #ifdef FEAT_CRYPT
      clear_string_option(&buf->b_p_key);
  #endif
      clear_string_option(&buf->b_p_kp);
      clear_string_option(&buf->b_p_mps);
      clear_string_option(&buf->b_p_fo);
      clear_string_option(&buf->b_p_flp);
      clear_string_option(&buf->b_p_isk);
  #ifdef FEAT_KEYMAP
      clear_string_option(&buf->b_p_keymap);
      ga_clear(&buf->b_kmap_ga);
  #endif
  #ifdef FEAT_COMMENTS
      clear_string_option(&buf->b_p_com);
  #endif
  #ifdef FEAT_FOLDING
      clear_string_option(&buf->b_p_cms);
  #endif
      clear_string_option(&buf->b_p_nf);
  #ifdef FEAT_SYN_HL
      clear_string_option(&buf->b_p_syn);
  #endif
  #ifdef FEAT_SPELL
      clear_string_option(&buf->b_s.b_p_spc);
      clear_string_option(&buf->b_s.b_p_spf);
      vim_free(buf->b_s.b_cap_prog);
      buf->b_s.b_cap_prog = NULL;
      clear_string_option(&buf->b_s.b_p_spl);
  #endif
  #ifdef FEAT_SEARCHPATH
      clear_string_option(&buf->b_p_sua);
  #endif
  #ifdef FEAT_AUTOCMD
      clear_string_option(&buf->b_p_ft);
  #endif
  #ifdef FEAT_CINDENT
      clear_string_option(&buf->b_p_cink);
      clear_string_option(&buf->b_p_cino);
  #endif
  #if defined(FEAT_CINDENT) || defined(FEAT_SMARTINDENT)
      clear_string_option(&buf->b_p_cinw);
  #endif
  #ifdef FEAT_INS_EXPAND
      clear_string_option(&buf->b_p_cpt);
  #endif
  #ifdef FEAT_COMPL_FUNC
      clear_string_option(&buf->b_p_cfu);
      clear_string_option(&buf->b_p_ofu);
  #endif
  #ifdef FEAT_QUICKFIX
      clear_string_option(&buf->b_p_gp);
      clear_string_option(&buf->b_p_mp);
      clear_string_option(&buf->b_p_efm);
  #endif
      clear_string_option(&buf->b_p_ep);
      clear_string_option(&buf->b_p_path);
      clear_string_option(&buf->b_p_tags);
  #ifdef FEAT_INS_EXPAND
      clear_string_option(&buf->b_p_dict);
      clear_string_option(&buf->b_p_tsr);
  #endif
  #ifdef FEAT_TEXTOBJ
      clear_string_option(&buf->b_p_qe);
  #endif
      buf->b_p_ar = -1;
  }
  
  /*
   * get alternate file n
   * set linenr to lnum or altfpos.lnum if lnum == 0
   *	also set cursor column to altfpos.col if 'startofline' is not set.
   * if (options & GETF_SETMARK) call setpcmark()
   * if (options & GETF_ALT) we are jumping to an alternate file.
   * if (options & GETF_SWITCH) respect 'switchbuf' settings when jumping
   *
   * return FAIL for failure, OK for success
   */
      int
  buflist_getfile(n, lnum, options, forceit)
      int		n;
      linenr_T	lnum;
      int		options;
      int		forceit;
  {
      buf_T	*buf;
  #ifdef FEAT_WINDOWS
      win_T	*wp = NULL;
  #endif
      pos_T	*fpos;
      colnr_T	col;
  
      buf = buflist_findnr(n);
      if (buf == NULL)
      {
  	if ((options & GETF_ALT) && n == 0)
  	    EMSG(_(e_noalt));
  	else
  	    EMSGN(_("E92: Buffer %ld not found"), n);
  	return FAIL;
      }
  
      /* if alternate file is the current buffer, nothing to do */
      if (buf == curbuf)
  	return OK;
  
      if (text_locked())
      {
  	text_locked_msg();
  	return FAIL;
      }
  #ifdef FEAT_AUTOCMD
      if (curbuf_locked())
  	return FAIL;
  #endif
  
      /* altfpos may be changed by getfile(), get it now */
      if (lnum == 0)
      {
  	fpos = buflist_findfpos(buf);
  	lnum = fpos->lnum;
  	col = fpos->col;
      }
      else
  	col = 0;
  
  #ifdef FEAT_WINDOWS
      if (options & GETF_SWITCH)
      {
  	/* If 'switchbuf' contains "useopen": jump to first window containing
  	 * "buf" if one exists */
  	if (swb_flags & SWB_USEOPEN)
  	    wp = buf_jump_open_win(buf);
  	/* If 'switchbuf' contians "usetab": jump to first window in any tab
  	 * page containing "buf" if one exists */
  	if (wp == NULL && (swb_flags & SWB_USETAB))
  	    wp = buf_jump_open_tab(buf);
  	/* If 'switchbuf' contains "split" or "newtab" and the current buffer
  	 * isn't empty: open new window */
  	if (wp == NULL && (swb_flags & (SWB_SPLIT | SWB_NEWTAB)) && !bufempty())
  	{
  	    if (swb_flags & SWB_NEWTAB)		/* Open in a new tab */
  		tabpage_new();
  	    else if (win_split(0, 0) == FAIL)	/* Open in a new window */
  		return FAIL;
  	    RESET_BINDING(curwin);
  	}
      }
  #endif
  
      ++RedrawingDisabled;
      if (getfile(buf->b_fnum, NULL, NULL, (options & GETF_SETMARK),
  							  lnum, forceit) <= 0)
      {
  	--RedrawingDisabled;
  
  	/* cursor is at to BOL and w_cursor.lnum is checked due to getfile() */
  	if (!p_sol && col != 0)
  	{
  	    curwin->w_cursor.col = col;
  	    check_cursor_col();
  #ifdef FEAT_VIRTUALEDIT
  	    curwin->w_cursor.coladd = 0;
  #endif
  	    curwin->w_set_curswant = TRUE;
  	}
  	return OK;
      }
      --RedrawingDisabled;
      return FAIL;
  }
  
  /*
   * go to the last know line number for the current buffer
   */
      void
  buflist_getfpos()
  {
      pos_T	*fpos;
  
      fpos = buflist_findfpos(curbuf);
  
      curwin->w_cursor.lnum = fpos->lnum;
      check_cursor_lnum();
  
      if (p_sol)
  	curwin->w_cursor.col = 0;
      else
      {
  	curwin->w_cursor.col = fpos->col;
  	check_cursor_col();
  #ifdef FEAT_VIRTUALEDIT
  	curwin->w_cursor.coladd = 0;
  #endif
  	curwin->w_set_curswant = TRUE;
      }
  }
  
  #if defined(FEAT_QUICKFIX) || defined(FEAT_EVAL) || defined(PROTO)
  /*
   * Find file in buffer list by name (it has to be for the current window).
   * Returns NULL if not found.
   */
      buf_T *
  buflist_findname_exp(fname)
      char_u *fname;
  {
      char_u	*ffname;
      buf_T	*buf = NULL;
  
      /* First make the name into a full path name */
      ffname = FullName_save(fname,
  #ifdef UNIX
  	    TRUE	    /* force expansion, get rid of symbolic links */
  #else
  	    FALSE
  #endif
  	    );
      if (ffname != NULL)
      {
  	buf = buflist_findname(ffname);
  	vim_free(ffname);
      }
      return buf;
  }
  #endif
  
  /*
   * Find file in buffer list by name (it has to be for the current window).
   * "ffname" must have a full path.
   * Skips dummy buffers.
   * Returns NULL if not found.
   */
      buf_T *
  buflist_findname(ffname)
      char_u	*ffname;
  {
  #ifdef UNIX
      struct stat st;
  
      if (mch_stat((char *)ffname, &st) < 0)
  	st.st_dev = (dev_T)-1;
      return buflist_findname_stat(ffname, &st);
  }
  
  /*
   * Same as buflist_findname(), but pass the stat structure to avoid getting it
   * twice for the same file.
   * Returns NULL if not found.
   */
      static buf_T *
  buflist_findname_stat(ffname, stp)
      char_u	*ffname;
      struct stat	*stp;
  {
  #endif
      buf_T	*buf;
  
      for (buf = firstbuf; buf != NULL; buf = buf->b_next)
  	if ((buf->b_flags & BF_DUMMY) == 0 && !otherfile_buf(buf, ffname
  #ifdef UNIX
  		    , stp
  #endif
  		    ))
  	    return buf;
      return NULL;
  }
  
  #if defined(FEAT_LISTCMDS) || defined(FEAT_EVAL) || defined(FEAT_PERL) || defined(PROTO)
  /*
   * Find file in buffer list by a regexp pattern.
   * Return fnum of the found buffer.
   * Return < 0 for error.
   */
      int
  buflist_findpat(pattern, pattern_end, unlisted, diffmode)
      char_u	*pattern;
      char_u	*pattern_end;	/* pointer to first char after pattern */
      int		unlisted;	/* find unlisted buffers */
      int		diffmode UNUSED; /* find diff-mode buffers only */
  {
      buf_T	*buf;
      regprog_T	*prog;
      int		match = -1;
      int		find_listed;
      char_u	*pat;
      char_u	*patend;
      int		attempt;
      char_u	*p;
      int		toggledollar;
  
      if (pattern_end == pattern + 1 && (*pattern == '%' || *pattern == '#'))
      {
  	if (*pattern == '%')
  	    match = curbuf->b_fnum;
  	else
  	    match = curwin->w_alt_fnum;
  #ifdef FEAT_DIFF
  	if (diffmode && !diff_mode_buf(buflist_findnr(match)))
  	    match = -1;
  #endif
      }
  
      /*
       * Try four ways of matching a listed buffer:
       * attempt == 0: without '^' or '$' (at any position)
       * attempt == 1: with '^' at start (only at position 0)
       * attempt == 2: with '$' at end (only match at end)
       * attempt == 3: with '^' at start and '$' at end (only full match)
       * Repeat this for finding an unlisted buffer if there was no matching
       * listed buffer.
       */
      else
      {
  	pat = file_pat_to_reg_pat(pattern, pattern_end, NULL, FALSE);
  	if (pat == NULL)
  	    return -1;
  	patend = pat + STRLEN(pat) - 1;
  	toggledollar = (patend > pat && *patend == '$');
  
  	/* First try finding a listed buffer.  If not found and "unlisted"
  	 * is TRUE, try finding an unlisted buffer. */
  	find_listed = TRUE;
  	for (;;)
  	{
  	    for (attempt = 0; attempt <= 3; ++attempt)
  	    {
  		/* may add '^' and '$' */
  		if (toggledollar)
  		    *patend = (attempt < 2) ? NUL : '$'; /* add/remove '$' */
  		p = pat;
  		if (*p == '^' && !(attempt & 1))	 /* add/remove '^' */
  		    ++p;
  		prog = vim_regcomp(p, p_magic ? RE_MAGIC : 0);
  		if (prog == NULL)
  		{
  		    vim_free(pat);
  		    return -1;
  		}
  
  		for (buf = firstbuf; buf != NULL; buf = buf->b_next)
  		    if (buf->b_p_bl == find_listed
  #ifdef FEAT_DIFF
  			    && (!diffmode || diff_mode_buf(buf))
  #endif
  			    && buflist_match(prog, buf) != NULL)
  		    {
  			if (match >= 0)		/* already found a match */
  			{
  			    match = -2;
  			    break;
  			}
  			match = buf->b_fnum;	/* remember first match */
  		    }
  
  		vim_free(prog);
  		if (match >= 0)			/* found one match */
  		    break;
  	    }
  
  	    /* Only search for unlisted buffers if there was no match with
  	     * a listed buffer. */
  	    if (!unlisted || !find_listed || match != -1)
  		break;
  	    find_listed = FALSE;
  	}
  
  	vim_free(pat);
      }
  
      if (match == -2)
  	EMSG2(_("E93: More than one match for %s"), pattern);
      else if (match < 0)
  	EMSG2(_("E94: No matching buffer for %s"), pattern);
      return match;
  }
  #endif
  
  #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
  
  /*
   * Find all buffer names that match.
   * For command line expansion of ":buf" and ":sbuf".
   * Return OK if matches found, FAIL otherwise.
   */
      int
  ExpandBufnames(pat, num_file, file, options)
      char_u	*pat;
      int		*num_file;
      char_u	***file;
      int		options;
  {
      int		count = 0;
      buf_T	*buf;
      int		round;
      char_u	*p;
      int		attempt;
      regprog_T	*prog;
      char_u	*patc;
  
      *num_file = 0;		    /* return values in case of FAIL */
      *file = NULL;
  
      /* Make a copy of "pat" and change "^" to "\(^\|[\/]\)". */
      if (*pat == '^')
      {
  	patc = alloc((unsigned)STRLEN(pat) + 11);
  	if (patc == NULL)
  	    return FAIL;
  	STRCPY(patc, "\\(^\\|[\\/]\\)");
  	STRCPY(patc + 11, pat + 1);
      }
      else
  	patc = pat;
  
      /*
       * attempt == 0: try match with    '\<', match at start of word
       * attempt == 1: try match without '\<', match anywhere
       */
      for (attempt = 0; attempt <= 1; ++attempt)
      {
  	if (attempt > 0 && patc == pat)
  	    break;	/* there was no anchor, no need to try again */
  	prog = vim_regcomp(patc + attempt * 11, RE_MAGIC);
  	if (prog == NULL)
  	{
  	    if (patc != pat)
  		vim_free(patc);
  	    return FAIL;
  	}
  
  	/*
  	 * round == 1: Count the matches.
  	 * round == 2: Build the array to keep the matches.
  	 */
  	for (round = 1; round <= 2; ++round)
  	{
  	    count = 0;
  	    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
  	    {
  		if (!buf->b_p_bl)	/* skip unlisted buffers */
  		    continue;
  		p = buflist_match(prog, buf);
  		if (p != NULL)
  		{
  		    if (round == 1)
  			++count;
  		    else
  		    {
  			if (options & WILD_HOME_REPLACE)
  			    p = home_replace_save(buf, p);
  			else
  			    p = vim_strsave(p);
  			(*file)[count++] = p;
  		    }
  		}
  	    }
  	    if (count == 0)	/* no match found, break here */
  		break;
  	    if (round == 1)
  	    {
  		*file = (char_u **)alloc((unsigned)(count * sizeof(char_u *)));
  		if (*file == NULL)
  		{
  		    vim_free(prog);
  		    if (patc != pat)
  			vim_free(patc);
  		    return FAIL;
  		}
  	    }
  	}
  	vim_free(prog);
  	if (count)		/* match(es) found, break here */
  	    break;
      }
  
      if (patc != pat)
  	vim_free(patc);
  
      *num_file = count;
      return (count == 0 ? FAIL : OK);
  }
  
  #endif /* FEAT_CMDL_COMPL */
  
  #ifdef HAVE_BUFLIST_MATCH
  /*
   * Check for a match on the file name for buffer "buf" with regprog "prog".
   */
      static char_u *
  buflist_match(prog, buf)
      regprog_T	*prog;
      buf_T	*buf;
  {
      char_u	*match;
  
      /* First try the short file name, then the long file name. */
      match = fname_match(prog, buf->b_sfname);
      if (match == NULL)
  	match = fname_match(prog, buf->b_ffname);
  
      return match;
  }
  
  /*
   * Try matching the regexp in "prog" with file name "name".
   * Return "name" when there is a match, NULL when not.
   */
      static char_u *
  fname_match(prog, name)
      regprog_T	*prog;
      char_u	*name;
  {
      char_u	*match = NULL;
      char_u	*p;
      regmatch_T	regmatch;
  
      if (name != NULL)
      {
  	regmatch.regprog = prog;
  #ifdef CASE_INSENSITIVE_FILENAME
  	regmatch.rm_ic = TRUE;		/* Always ignore case */
  #else
  	regmatch.rm_ic = FALSE;		/* Never ignore case */
  #endif
  
  	if (vim_regexec(&regmatch, name, (colnr_T)0))
  	    match = name;
  	else
  	{
  	    /* Replace $(HOME) with '~' and try matching again. */
  	    p = home_replace_save(NULL, name);
  	    if (p != NULL && vim_regexec(&regmatch, p, (colnr_T)0))
  		match = name;
  	    vim_free(p);
  	}
      }
  
      return match;
  }
  #endif
  
  /*
   * find file in buffer list by number
   */
      buf_T *
  buflist_findnr(nr)
      int		nr;
  {
      buf_T	*buf;
  
      if (nr == 0)
  	nr = curwin->w_alt_fnum;
      for (buf = firstbuf; buf != NULL; buf = buf->b_next)
  	if (buf->b_fnum == nr)
  	    return (buf);
      return NULL;
  }
  
  /*
   * Get name of file 'n' in the buffer list.
   * When the file has no name an empty string is returned.
   * home_replace() is used to shorten the file name (used for marks).
   * Returns a pointer to allocated memory, of NULL when failed.
   */
      char_u *
  buflist_nr2name(n, fullname, helptail)
      int		n;
      int		fullname;
      int		helptail;	/* for help buffers return tail only */
  {
      buf_T	*buf;
  
      buf = buflist_findnr(n);
      if (buf == NULL)
  	return NULL;
      return home_replace_save(helptail ? buf : NULL,
  				     fullname ? buf->b_ffname : buf->b_fname);
  }
  
  /*
   * Set the "lnum" and "col" for the buffer "buf" and the current window.
   * When "copy_options" is TRUE save the local window option values.
   * When "lnum" is 0 only do the options.
   */
      static void
  buflist_setfpos(buf, win, lnum, col, copy_options)
      buf_T	*buf;
      win_T	*win;
      linenr_T	lnum;
      colnr_T	col;
      int		copy_options;
  {
      wininfo_T	*wip;
  
      for (wip = buf->b_wininfo; wip != NULL; wip = wip->wi_next)
  	if (wip->wi_win == win)
  	    break;
      if (wip == NULL)
      {
  	/* allocate a new entry */
  	wip = (wininfo_T *)alloc_clear((unsigned)sizeof(wininfo_T));
  	if (wip == NULL)
  	    return;
  	wip->wi_win = win;
  	if (lnum == 0)		/* set lnum even when it's 0 */
  	    lnum = 1;
      }
      else
      {
  	/* remove the entry from the list */
  	if (wip->wi_prev)
  	    wip->wi_prev->wi_next = wip->wi_next;
  	else
  	    buf->b_wininfo = wip->wi_next;
  	if (wip->wi_next)
  	    wip->wi_next->wi_prev = wip->wi_prev;
  	if (copy_options && wip->wi_optset)
  	{
  	    clear_winopt(&wip->wi_opt);
  #ifdef FEAT_FOLDING
  	    deleteFoldRecurse(&wip->wi_folds);
  #endif
  	}
      }
      if (lnum != 0)
      {
  	wip->wi_fpos.lnum = lnum;
  	wip->wi_fpos.col = col;
      }
      if (copy_options)
      {
  	/* Save the window-specific option values. */
  	copy_winopt(&win->w_onebuf_opt, &wip->wi_opt);
  #ifdef FEAT_FOLDING
  	wip->wi_fold_manual = win->w_fold_manual;
  	cloneFoldGrowArray(&win->w_folds, &wip->wi_folds);
  #endif
  	wip->wi_optset = TRUE;
      }
  
      /* insert the entry in front of the list */
      wip->wi_next = buf->b_wininfo;
      buf->b_wininfo = wip;
      wip->wi_prev = NULL;
      if (wip->wi_next)
  	wip->wi_next->wi_prev = wip;
  
      return;
  }
  
  #ifdef FEAT_DIFF
  static int wininfo_other_tab_diff __ARGS((wininfo_T *wip));
  
  /*
   * Return TRUE when "wip" has 'diff' set and the diff is only for another tab
   * page.  That's because a diff is local to a tab page.
   */
      static int
  wininfo_other_tab_diff(wip)
      wininfo_T	*wip;
  {
      win_T	*wp;
  
      if (wip->wi_opt.wo_diff)
      {
  	for (wp = firstwin; wp != NULL; wp = wp->w_next)
  	    /* return FALSE when it's a window in the current tab page, thus
  	     * the buffer was in diff mode here */
  	    if (wip->wi_win == wp)
  		return FALSE;
  	return TRUE;
      }
      return FALSE;
  }
  #endif
  
  /*
   * Find info for the current window in buffer "buf".
   * If not found, return the info for the most recently used window.
   * When "skip_diff_buffer" is TRUE avoid windows with 'diff' set that is in
   * another tab page.
   * Returns NULL when there isn't any info.
   */
      static wininfo_T *
  find_wininfo(buf, skip_diff_buffer)
      buf_T	*buf;
      int		skip_diff_buffer UNUSED;
  {
      wininfo_T	*wip;
  
      for (wip = buf->b_wininfo; wip != NULL; wip = wip->wi_next)
  	if (wip->wi_win == curwin
  #ifdef FEAT_DIFF
  		&& (!skip_diff_buffer || !wininfo_other_tab_diff(wip))
  #endif
  	   )
  	    break;
  
      /* If no wininfo for curwin, use the first in the list (that doesn't have
       * 'diff' set and is in another tab page). */
      if (wip == NULL)
      {
  #ifdef FEAT_DIFF
  	if (skip_diff_buffer)
  	{
  	    for (wip = buf->b_wininfo; wip != NULL; wip = wip->wi_next)
  		if (!wininfo_other_tab_diff(wip))
  		    break;
  	}
  	else
  #endif
  	    wip = buf->b_wininfo;
      }
      return wip;
  }
  
  /*
   * Reset the local window options to the values last used in this window.
   * If the buffer wasn't used in this window before, use the values from
   * the most recently used window.  If the values were never set, use the
   * global values for the window.
   */
      void
  get_winopts(buf)
      buf_T	*buf;
  {
      wininfo_T	*wip;
  
      clear_winopt(&curwin->w_onebuf_opt);
  #ifdef FEAT_FOLDING
      clearFolding(curwin);
  #endif
  
      wip = find_wininfo(buf, TRUE);
      if (wip != NULL && wip->wi_optset)
      {
  	copy_winopt(&wip->wi_opt, &curwin->w_onebuf_opt);
  #ifdef FEAT_FOLDING
  	curwin->w_fold_manual = wip->wi_fold_manual;
  	curwin->w_foldinvalid = TRUE;
  	cloneFoldGrowArray(&wip->wi_folds, &curwin->w_folds);
  #endif
      }
      else
  	copy_winopt(&curwin->w_allbuf_opt, &curwin->w_onebuf_opt);
  
  #ifdef FEAT_FOLDING
      /* Set 'foldlevel' to 'foldlevelstart' if it's not negative. */
      if (p_fdls >= 0)
  	curwin->w_p_fdl = p_fdls;
  #endif
  #ifdef FEAT_SYN_HL
      check_colorcolumn(curwin);
  #endif
  }
  
  /*
   * Find the position (lnum and col) for the buffer 'buf' for the current
   * window.
   * Returns a pointer to no_position if no position is found.
   */
      pos_T *
  buflist_findfpos(buf)
      buf_T	*buf;
  {
      wininfo_T	*wip;
      static pos_T no_position = INIT_POS_T(1, 0, 0);
  
      wip = find_wininfo(buf, FALSE);
      if (wip != NULL)
  	return &(wip->wi_fpos);
      else
  	return &no_position;
  }
  
  /*
   * Find the lnum for the buffer 'buf' for the current window.
   */
      linenr_T
  buflist_findlnum(buf)
      buf_T	*buf;
  {
      return buflist_findfpos(buf)->lnum;
  }
  
  #if defined(FEAT_LISTCMDS) || defined(PROTO)
  /*
   * List all know file names (for :files and :buffers command).
   */
      void
  buflist_list(eap)
      exarg_T	*eap;
  {
      buf_T	*buf;
      int		len;
      int		i;
  
      for (buf = firstbuf; buf != NULL && !got_int; buf = buf->b_next)
      {
  	/* skip unlisted buffers, unless ! was used */
  	if (!buf->b_p_bl && !eap->forceit)
  	    continue;
  	msg_putchar('\n');
  	if (buf_spname(buf) != NULL)
  	    STRCPY(NameBuff, buf_spname(buf));
  	else
  	    home_replace(buf, buf->b_fname, NameBuff, MAXPATHL, TRUE);
  
  	len = vim_snprintf((char *)IObuff, IOSIZE - 20, "%3d%c%c%c%c%c \"%s\"",
  		buf->b_fnum,
  		buf->b_p_bl ? ' ' : 'u',
  		buf == curbuf ? '%' :
  			(curwin->w_alt_fnum == buf->b_fnum ? '#' : ' '),
  		buf->b_ml.ml_mfp == NULL ? ' ' :
  			(buf->b_nwindows == 0 ? 'h' : 'a'),
  		!buf->b_p_ma ? '-' : (buf->b_p_ro ? '=' : ' '),
  		(buf->b_flags & BF_READERR) ? 'x'
  					    : (bufIsChanged(buf) ? '+' : ' '),
  		NameBuff);
  
  	/* put "line 999" in column 40 or after the file name */
  	i = 40 - vim_strsize(IObuff);
  	do
  	{
  	    IObuff[len++] = ' ';
  	} while (--i > 0 && len < IOSIZE - 18);
  	vim_snprintf((char *)IObuff + len, (size_t)(IOSIZE - len),
  		_("line %ld"), buf == curbuf ? curwin->w_cursor.lnum
  					       : (long)buflist_findlnum(buf));
  	msg_outtrans(IObuff);
  	out_flush();	    /* output one line at a time */
  	ui_breakcheck();
      }
  }
  #endif
  
  /*
   * Get file name and line number for file 'fnum'.
   * Used by DoOneCmd() for translating '%' and '#'.
   * Used by insert_reg() and cmdline_paste() for '#' register.
   * Return FAIL if not found, OK for success.
   */
      int
  buflist_name_nr(fnum, fname, lnum)
      int		fnum;
      char_u	**fname;
      linenr_T	*lnum;
  {
      buf_T	*buf;
  
      buf = buflist_findnr(fnum);
      if (buf == NULL || buf->b_fname == NULL)
  	return FAIL;
  
      *fname = buf->b_fname;
      *lnum = buflist_findlnum(buf);
  
      return OK;
  }
  
  /*
   * Set the file name for "buf"' to 'ffname', short file name to 'sfname'.
   * The file name with the full path is also remembered, for when :cd is used.
   * Returns FAIL for failure (file name already in use by other buffer)
   *	OK otherwise.
   */
      int
  setfname(buf, ffname, sfname, message)
      buf_T	*buf;
      char_u	*ffname, *sfname;
      int		message;	/* give message when buffer already exists */
  {
      buf_T	*obuf = NULL;
  #ifdef UNIX
      struct stat st;
  #endif
  
      if (ffname == NULL || *ffname == NUL)
      {
  	/* Removing the name. */
  	vim_free(buf->b_ffname);
  	vim_free(buf->b_sfname);
  	buf->b_ffname = NULL;
  	buf->b_sfname = NULL;
  #ifdef UNIX
  	st.st_dev = (dev_T)-1;
  #endif
      }
      else
      {
  	fname_expand(buf, &ffname, &sfname); /* will allocate ffname */
  	if (ffname == NULL)		    /* out of memory */
  	    return FAIL;
  
  	/*
  	 * if the file name is already used in another buffer:
  	 * - if the buffer is loaded, fail
  	 * - if the buffer is not loaded, delete it from the list
  	 */
  #ifdef UNIX
  	if (mch_stat((char *)ffname, &st) < 0)
  	    st.st_dev = (dev_T)-1;
  #endif
  	if (!(buf->b_flags & BF_DUMMY))
  #ifdef UNIX
  	    obuf = buflist_findname_stat(ffname, &st);
  #else
  	    obuf = buflist_findname(ffname);
  #endif
  	if (obuf != NULL && obuf != buf)
  	{
  	    if (obuf->b_ml.ml_mfp != NULL)	/* it's loaded, fail */
  	    {
  		if (message)
  		    EMSG(_("E95: Buffer with this name already exists"));
  		vim_free(ffname);
  		return FAIL;
  	    }
  	    /* delete from the list */
  	    close_buffer(NULL, obuf, DOBUF_WIPE, FALSE);
  	}
  	sfname = vim_strsave(sfname);
  	if (ffname == NULL || sfname == NULL)
  	{
  	    vim_free(sfname);
  	    vim_free(ffname);
  	    return FAIL;
  	}
  #ifdef USE_FNAME_CASE
  # ifdef USE_LONG_FNAME
  	if (USE_LONG_FNAME)
  # endif
  	    fname_case(sfname, 0);    /* set correct case for short file name */
  #endif
  	vim_free(buf->b_ffname);
  	vim_free(buf->b_sfname);
  	buf->b_ffname = ffname;
  	buf->b_sfname = sfname;
      }
      buf->b_fname = buf->b_sfname;
  #ifdef UNIX
      if (st.st_dev == (dev_T)-1)
  	buf->b_dev_valid = FALSE;
      else
      {
  	buf->b_dev_valid = TRUE;
  	buf->b_dev = st.st_dev;
  	buf->b_ino = st.st_ino;
      }
  #endif
  
  #ifndef SHORT_FNAME
      buf->b_shortname = FALSE;
  #endif
  
      buf_name_changed(buf);
      return OK;
  }
  
  /*
   * Crude way of changing the name of a buffer.  Use with care!
   * The name should be relative to the current directory.
   */
      void
  buf_set_name(fnum, name)
      int		fnum;
      char_u	*name;
  {
      buf_T	*buf;
  
      buf = buflist_findnr(fnum);
      if (buf != NULL)
      {
  	vim_free(buf->b_sfname);
  	vim_free(buf->b_ffname);
  	buf->b_ffname = vim_strsave(name);
  	buf->b_sfname = NULL;
  	/* Allocate ffname and expand into full path.  Also resolves .lnk
  	 * files on Win32. */
  	fname_expand(buf, &buf->b_ffname, &buf->b_sfname);
  	buf->b_fname = buf->b_sfname;
      }
  }
  
  /*
   * Take care of what needs to be done when the name of buffer "buf" has
   * changed.
   */
      void
  buf_name_changed(buf)
      buf_T	*buf;
  {
      /*
       * If the file name changed, also change the name of the swapfile
       */
      if (buf->b_ml.ml_mfp != NULL)
  	ml_setname(buf);
  
      if (curwin->w_buffer == buf)
  	check_arg_idx(curwin);	/* check file name for arg list */
  #ifdef FEAT_TITLE
      maketitle();		/* set window title */
  #endif
  #ifdef FEAT_WINDOWS
      status_redraw_all();	/* status lines need to be redrawn */
  #endif
      fmarks_check_names(buf);	/* check named file marks */
      ml_timestamp(buf);		/* reset timestamp */
  }
  
  /*
   * set alternate file name for current window
   *
   * Used by do_one_cmd(), do_write() and do_ecmd().
   * Return the buffer.
   */
      buf_T *
  setaltfname(ffname, sfname, lnum)
      char_u	*ffname;
      char_u	*sfname;
      linenr_T	lnum;
  {
      buf_T	*buf;
  
      /* Create a buffer.  'buflisted' is not set if it's a new buffer */
      buf = buflist_new(ffname, sfname, lnum, 0);
      if (buf != NULL && !cmdmod.keepalt)
  	curwin->w_alt_fnum = buf->b_fnum;
      return buf;
  }
  
  /*
   * Get alternate file name for current window.
   * Return NULL if there isn't any, and give error message if requested.
   */
      char_u  *
  getaltfname(errmsg)
      int		errmsg;		/* give error message */
  {
      char_u	*fname;
      linenr_T	dummy;
  
      if (buflist_name_nr(0, &fname, &dummy) == FAIL)
      {
  	if (errmsg)
  	    EMSG(_(e_noalt));
  	return NULL;
      }
      return fname;
  }
  
  /*
   * Add a file name to the buflist and return its number.
   * Uses same flags as buflist_new(), except BLN_DUMMY.
   *
   * used by qf_init(), main() and doarglist()
   */
      int
  buflist_add(fname, flags)
      char_u	*fname;
      int		flags;
  {
      buf_T	*buf;
  
      buf = buflist_new(fname, NULL, (linenr_T)0, flags);
      if (buf != NULL)
  	return buf->b_fnum;
      return 0;
  }
  
  #if defined(BACKSLASH_IN_FILENAME) || defined(PROTO)
  /*
   * Adjust slashes in file names.  Called after 'shellslash' was set.
   */
      void
  buflist_slash_adjust()
  {
      buf_T	*bp;
  
      for (bp = firstbuf; bp != NULL; bp = bp->b_next)
      {
  	if (bp->b_ffname != NULL)
  	    slash_adjust(bp->b_ffname);
  	if (bp->b_sfname != NULL)
  	    slash_adjust(bp->b_sfname);
      }
  }
  #endif
  
  /*
   * Set alternate cursor position for the current buffer and window "win".
   * Also save the local window option values.
   */
      void
  buflist_altfpos(win)
      win_T *win;
  {
      buflist_setfpos(curbuf, win, win->w_cursor.lnum, win->w_cursor.col, TRUE);
  }
  
  /*
   * Return TRUE if 'ffname' is not the same file as current file.
   * Fname must have a full path (expanded by mch_FullName()).
   */
      int
  otherfile(ffname)
      char_u	*ffname;
  {
      return otherfile_buf(curbuf, ffname
  #ifdef UNIX
  	    , NULL
  #endif
  	    );
  }
  
      static int
  otherfile_buf(buf, ffname
  #ifdef UNIX
  	, stp
  #endif
  	)
      buf_T	*buf;
      char_u	*ffname;
  #ifdef UNIX
      struct stat	*stp;
  #endif
  {
      /* no name is different */
      if (ffname == NULL || *ffname == NUL || buf->b_ffname == NULL)
  	return TRUE;
      if (fnamecmp(ffname, buf->b_ffname) == 0)
  	return FALSE;
  #ifdef UNIX
      {
  	struct stat	st;
  
  	/* If no struct stat given, get it now */
  	if (stp == NULL)
  	{
  	    if (!buf->b_dev_valid || mch_stat((char *)ffname, &st) < 0)
  		st.st_dev = (dev_T)-1;
  	    stp = &st;
  	}
  	/* Use dev/ino to check if the files are the same, even when the names
  	 * are different (possible with links).  Still need to compare the
  	 * name above, for when the file doesn't exist yet.
  	 * Problem: The dev/ino changes when a file is deleted (and created
  	 * again) and remains the same when renamed/moved.  We don't want to
  	 * mch_stat() each buffer each time, that would be too slow.  Get the
  	 * dev/ino again when they appear to match, but not when they appear
  	 * to be different: Could skip a buffer when it's actually the same
  	 * file. */
  	if (buf_same_ino(buf, stp))
  	{
  	    buf_setino(buf);
  	    if (buf_same_ino(buf, stp))
  		return FALSE;
  	}
      }
  #endif
      return TRUE;
  }
  
  #if defined(UNIX) || defined(PROTO)
  /*
   * Set inode and device number for a buffer.
   * Must always be called when b_fname is changed!.
   */
      void
  buf_setino(buf)
      buf_T	*buf;
  {
      struct stat	st;
  
      if (buf->b_fname != NULL && mch_stat((char *)buf->b_fname, &st) >= 0)
      {
  	buf->b_dev_valid = TRUE;
  	buf->b_dev = st.st_dev;
  	buf->b_ino = st.st_ino;
      }
      else
  	buf->b_dev_valid = FALSE;
  }
  
  /*
   * Return TRUE if dev/ino in buffer "buf" matches with "stp".
   */
      static int
  buf_same_ino(buf, stp)
      buf_T	*buf;
      struct stat *stp;
  {
      return (buf->b_dev_valid
  	    && stp->st_dev == buf->b_dev
  	    && stp->st_ino == buf->b_ino);
  }
  #endif
  
  /*
   * Print info about the current buffer.
   */
      void
  fileinfo(fullname, shorthelp, dont_truncate)
      int fullname;	    /* when non-zero print full path */
      int shorthelp;
      int	dont_truncate;
  {
      char_u	*name;
      int		n;
      char_u	*p;
      char_u	*buffer;
      size_t	len;
  
      buffer = alloc(IOSIZE);
      if (buffer == NULL)
  	return;
  
      if (fullname > 1)	    /* 2 CTRL-G: include buffer number */
      {
  	vim_snprintf((char *)buffer, IOSIZE, "buf %d: ", curbuf->b_fnum);
  	p = buffer + STRLEN(buffer);
      }
      else
  	p = buffer;
  
      *p++ = '"';
      if (buf_spname(curbuf) != NULL)
  	STRCPY(p, buf_spname(curbuf));
      else
      {
  	if (!fullname && curbuf->b_fname != NULL)
  	    name = curbuf->b_fname;
  	else
  	    name = curbuf->b_ffname;
  	home_replace(shorthelp ? curbuf : NULL, name, p,
  					  (int)(IOSIZE - (p - buffer)), TRUE);
      }
  
      vim_snprintf_add((char *)buffer, IOSIZE, "\"%s%s%s%s%s%s",
  	    curbufIsChanged() ? (shortmess(SHM_MOD)
  					  ?  " [+]" : _(" [Modified]")) : " ",
  	    (curbuf->b_flags & BF_NOTEDITED)
  #ifdef FEAT_QUICKFIX
  		    && !bt_dontwrite(curbuf)
  #endif
  					? _("[Not edited]") : "",
  	    (curbuf->b_flags & BF_NEW)
  #ifdef FEAT_QUICKFIX
  		    && !bt_dontwrite(curbuf)
  #endif
  					? _("[New file]") : "",
  	    (curbuf->b_flags & BF_READERR) ? _("[Read errors]") : "",
  	    curbuf->b_p_ro ? (shortmess(SHM_RO) ? "[RO]"
  						      : _("[readonly]")) : "",
  	    (curbufIsChanged() || (curbuf->b_flags & BF_WRITE_MASK)
  							  || curbuf->b_p_ro) ?
  								    " " : "");
      /* With 32 bit longs and more than 21,474,836 lines multiplying by 100
       * causes an overflow, thus for large numbers divide instead. */
      if (curwin->w_cursor.lnum > 1000000L)
  	n = (int)(((long)curwin->w_cursor.lnum) /
  				   ((long)curbuf->b_ml.ml_line_count / 100L));
      else
  	n = (int)(((long)curwin->w_cursor.lnum * 100L) /
  					    (long)curbuf->b_ml.ml_line_count);
      if (curbuf->b_ml.ml_flags & ML_EMPTY)
      {
  	vim_snprintf_add((char *)buffer, IOSIZE, "%s", _(no_lines_msg));
      }
  #ifdef FEAT_CMDL_INFO
      else if (p_ru)
      {
  	/* Current line and column are already on the screen -- webb */
  	if (curbuf->b_ml.ml_line_count == 1)
  	    vim_snprintf_add((char *)buffer, IOSIZE, _("1 line --%d%%--"), n);
  	else
  	    vim_snprintf_add((char *)buffer, IOSIZE, _("%ld lines --%d%%--"),
  					 (long)curbuf->b_ml.ml_line_count, n);
      }
  #endif
      else
      {
  	vim_snprintf_add((char *)buffer, IOSIZE,
  		_("line %ld of %ld --%d%%-- col "),
  		(long)curwin->w_cursor.lnum,
  		(long)curbuf->b_ml.ml_line_count,
  		n);
  	validate_virtcol();
  	len = STRLEN(buffer);
  	col_print(buffer + len, IOSIZE - len,
  		   (int)curwin->w_cursor.col + 1, (int)curwin->w_virtcol + 1);
      }
  
      (void)append_arg_number(curwin, buffer, IOSIZE, !shortmess(SHM_FILE));
  
      if (dont_truncate)
      {
  	/* Temporarily set msg_scroll to avoid the message being truncated.
  	 * First call msg_start() to get the message in the right place. */
  	msg_start();
  	n = msg_scroll;
  	msg_scroll = TRUE;
  	msg(buffer);
  	msg_scroll = n;
      }
      else
      {
  	p = msg_trunc_attr(buffer, FALSE, 0);
  	if (restart_edit != 0 || (msg_scrolled && !need_wait_return))
  	    /* Need to repeat the message after redrawing when:
  	     * - When restart_edit is set (otherwise there will be a delay
  	     *   before redrawing).
  	     * - When the screen was scrolled but there is no wait-return
  	     *   prompt. */
  	    set_keep_msg(p, 0);
      }
  
      vim_free(buffer);
  }
  
      void
  col_print(buf, buflen, col, vcol)
      char_u  *buf;
      size_t  buflen;
      int	    col;
      int	    vcol;
  {
      if (col == vcol)
  	vim_snprintf((char *)buf, buflen, "%d", col);
      else
  	vim_snprintf((char *)buf, buflen, "%d-%d", col, vcol);
  }
  
  #if defined(FEAT_TITLE) || defined(PROTO)
  /*
   * put file name in title bar of window and in icon title
   */
  
  static char_u *lasttitle = NULL;
  static char_u *lasticon = NULL;
  
      void
  maketitle()
  {
      char_u	*p;
      char_u	*t_str = NULL;
      char_u	*i_name;
      char_u	*i_str = NULL;
      int		maxlen = 0;
      int		len;
      int		mustset;
      char_u	buf[IOSIZE];
      int		off;
  
      if (!redrawing())
      {
  	/* Postpone updating the title when 'lazyredraw' is set. */
  	need_maketitle = TRUE;
  	return;
      }
  
      need_maketitle = FALSE;
      if (!p_title && !p_icon && lasttitle == NULL && lasticon == NULL)
  	return;
  
      if (p_title)
      {
  	if (p_titlelen > 0)
  	{
  	    maxlen = p_titlelen * Columns / 100;
  	    if (maxlen < 10)
  		maxlen = 10;
  	}
  
  	t_str = buf;
  	if (*p_titlestring != NUL)
  	{
  #ifdef FEAT_STL_OPT
  	    if (stl_syntax & STL_IN_TITLE)
  	    {
  		int	use_sandbox = FALSE;
  		int	save_called_emsg = called_emsg;
  
  # ifdef FEAT_EVAL
  		use_sandbox = was_set_insecurely((char_u *)"titlestring", 0);
  # endif
  		called_emsg = FALSE;
  		build_stl_str_hl(curwin, t_str, sizeof(buf),
  					      p_titlestring, use_sandbox,
  					      0, maxlen, NULL, NULL);
  		if (called_emsg)
  		    set_string_option_direct((char_u *)"titlestring", -1,
  					   (char_u *)"", OPT_FREE, SID_ERROR);
  		called_emsg |= save_called_emsg;
  	    }
  	    else
  #endif
  		t_str = p_titlestring;
  	}
  	else
  	{
  	    /* format: "fname + (path) (1 of 2) - VIM" */
  
  	    if (curbuf->b_fname == NULL)
  		vim_strncpy(buf, (char_u *)_("[No Name]"), IOSIZE - 100);
  	    else
  	    {
  		p = transstr(gettail(curbuf->b_fname));
  		vim_strncpy(buf, p, IOSIZE - 100);
  		vim_free(p);
  	    }
  
  	    switch (bufIsChanged(curbuf)
  		    + (curbuf->b_p_ro * 2)
  		    + (!curbuf->b_p_ma * 4))
  	    {
  		case 1: STRCAT(buf, " +"); break;
  		case 2: STRCAT(buf, " ="); break;
  		case 3: STRCAT(buf, " =+"); break;
  		case 4:
  		case 6: STRCAT(buf, " -"); break;
  		case 5:
  		case 7: STRCAT(buf, " -+"); break;
  	    }
  
  	    if (curbuf->b_fname != NULL)
  	    {
  		/* Get path of file, replace home dir with ~ */
  		off = (int)STRLEN(buf);
  		buf[off++] = ' ';
  		buf[off++] = '(';
  		home_replace(curbuf, curbuf->b_ffname,
  					       buf + off, IOSIZE - off, TRUE);
  #ifdef BACKSLASH_IN_FILENAME
  		/* avoid "c:/name" to be reduced to "c" */
  		if (isalpha(buf[off]) && buf[off + 1] == ':')
  		    off += 2;
  #endif
  		/* remove the file name */
  		p = gettail_sep(buf + off);
  		if (p == buf + off)
  		    /* must be a help buffer */
  		    vim_strncpy(buf + off, (char_u *)_("help"),
  						  (size_t)(IOSIZE - off - 1));
  		else
  		    *p = NUL;
  
  		/* translate unprintable chars */
  		p = transstr(buf + off);
  		vim_strncpy(buf + off, p, (size_t)(IOSIZE - off - 1));
  		vim_free(p);
  		STRCAT(buf, ")");
  	    }
  
  	    append_arg_number(curwin, buf, IOSIZE, FALSE);
  
  #if defined(FEAT_CLIENTSERVER)
  	    if (serverName != NULL)
  	    {
  		STRCAT(buf, " - ");
  		vim_strcat(buf, serverName, IOSIZE);
  	    }
  	    else
  #endif
  		STRCAT(buf, " - VIM");
  
  	    if (maxlen > 0)
  	    {
  		/* make it shorter by removing a bit in the middle */
  		if (vim_strsize(buf) > maxlen)
  		    trunc_string(buf, buf, maxlen, IOSIZE);
  	    }
  	}
      }
      mustset = ti_change(t_str, &lasttitle);
  
      if (p_icon)
      {
  	i_str = buf;
  	if (*p_iconstring != NUL)
  	{
  #ifdef FEAT_STL_OPT
  	    if (stl_syntax & STL_IN_ICON)
  	    {
  		int	use_sandbox = FALSE;
  		int	save_called_emsg = called_emsg;
  
  # ifdef FEAT_EVAL
  		use_sandbox = was_set_insecurely((char_u *)"iconstring", 0);
  # endif
  		called_emsg = FALSE;
  		build_stl_str_hl(curwin, i_str, sizeof(buf),
  						    p_iconstring, use_sandbox,
  						    0, 0, NULL, NULL);
  		if (called_emsg)
  		    set_string_option_direct((char_u *)"iconstring", -1,
  					   (char_u *)"", OPT_FREE, SID_ERROR);
  		called_emsg |= save_called_emsg;
  	    }
  	    else
  #endif
  		i_str = p_iconstring;
  	}
  	else
  	{
  	    if (buf_spname(curbuf) != NULL)
  		i_name = (char_u *)buf_spname(curbuf);
  	    else		    /* use file name only in icon */
  		i_name = gettail(curbuf->b_ffname);
  	    *i_str = NUL;
  	    /* Truncate name at 100 bytes. */
  	    len = (int)STRLEN(i_name);
  	    if (len > 100)
  	    {
  		len -= 100;
  #ifdef FEAT_MBYTE
  		if (has_mbyte)
  		    len += (*mb_tail_off)(i_name, i_name + len) + 1;
  #endif
  		i_name += len;
  	    }
  	    STRCPY(i_str, i_name);
  	    trans_characters(i_str, IOSIZE);
  	}
      }
  
      mustset |= ti_change(i_str, &lasticon);
  
      if (mustset)
  	resettitle();
  }
  
  /*
   * Used for title and icon: Check if "str" differs from "*last".  Set "*last"
   * from "str" if it does.
   * Return TRUE when "*last" changed.
   */
      static int
  ti_change(str, last)
      char_u	*str;
      char_u	**last;
  {
      if ((str == NULL) != (*last == NULL)
  	    || (str != NULL && *last != NULL && STRCMP(str, *last) != 0))
      {
  	vim_free(*last);
  	if (str == NULL)
  	    *last = NULL;
  	else
  	    *last = vim_strsave(str);
  	return TRUE;
      }
      return FALSE;
  }
  
  /*
   * Put current window title back (used after calling a shell)
   */
      void
  resettitle()
  {
      mch_settitle(lasttitle, lasticon);
  }
  
  # if defined(EXITFREE) || defined(PROTO)
      void
  free_titles()
  {
      vim_free(lasttitle);
      vim_free(lasticon);
  }
  # endif
  
  #endif /* FEAT_TITLE */
  
  #if defined(FEAT_STL_OPT) || defined(FEAT_GUI_TABLINE) || defined(PROTO)
  /*
   * Build a string from the status line items in "fmt".
   * Return length of string in screen cells.
   *
   * Normally works for window "wp", except when working for 'tabline' then it
   * is "curwin".
   *
   * Items are drawn interspersed with the text that surrounds it
   * Specials: %-<wid>(xxx%) => group, %= => middle marker, %< => truncation
   * Item: %-<minwid>.<maxwid><itemch> All but <itemch> are optional
   *
   * If maxwidth is not zero, the string will be filled at any middle marker
   * or truncated if too long, fillchar is used for all whitespace.
   */
      int
  build_stl_str_hl(wp, out, outlen, fmt, use_sandbox, fillchar,
  						      maxwidth, hltab, tabtab)
      win_T	*wp;
      char_u	*out;		/* buffer to write into != NameBuff */
      size_t	outlen;		/* length of out[] */
      char_u	*fmt;
      int		use_sandbox UNUSED; /* "fmt" was set insecurely, use sandbox */
      int		fillchar;
      int		maxwidth;
      struct stl_hlrec *hltab;	/* return: HL attributes (can be NULL) */
      struct stl_hlrec *tabtab;	/* return: tab page nrs (can be NULL) */
  {
      char_u	*p;
      char_u	*s;
      char_u	*t;
      char_u	*linecont;
  #ifdef FEAT_EVAL
      win_T	*o_curwin;
      buf_T	*o_curbuf;
  #endif
      int		empty_line;
      colnr_T	virtcol;
      long	l;
      long	n;
      int		prevchar_isflag;
      int		prevchar_isitem;
      int		itemisflag;
      int		fillable;
      char_u	*str;
      long	num;
      int		width;
      int		itemcnt;
      int		curitem;
      int		groupitem[STL_MAX_ITEM];
      int		groupdepth;
      struct stl_item
      {
  	char_u		*start;
  	int		minwid;
  	int		maxwid;
  	enum
  	{
  	    Normal,
  	    Empty,
  	    Group,
  	    Middle,
  	    Highlight,
  	    TabPage,
  	    Trunc
  	}		type;
      }		item[STL_MAX_ITEM];
      int		minwid;
      int		maxwid;
      int		zeropad;
      char_u	base;
      char_u	opt;
  #define TMPLEN 70
      char_u	tmp[TMPLEN];
      char_u	*usefmt = fmt;
      struct stl_hlrec *sp;
  
  #ifdef FEAT_EVAL
      /*
       * When the format starts with "%!" then evaluate it as an expression and
       * use the result as the actual format string.
       */
      if (fmt[0] == '%' && fmt[1] == '!')
      {
  	usefmt = eval_to_string_safe(fmt + 2, NULL, use_sandbox);
  	if (usefmt == NULL)
  	    usefmt = fmt;
      }
  #endif
  
      if (fillchar == 0)
  	fillchar = ' ';
  #ifdef FEAT_MBYTE
      /* Can't handle a multi-byte fill character yet. */
      else if (mb_char2len(fillchar) > 1)
  	fillchar = '-';
  #endif
  
      /*
       * Get line & check if empty (cursorpos will show "0-1").
       * If inversion is possible we use it. Else '=' characters are used.
       */
      linecont = ml_get_buf(wp->w_buffer, wp->w_cursor.lnum, FALSE);
      empty_line = (*linecont == NUL);
  
      groupdepth = 0;
      p = out;
      curitem = 0;
      prevchar_isflag = TRUE;
      prevchar_isitem = FALSE;
      for (s = usefmt; *s; )
      {
  	if (curitem == STL_MAX_ITEM)
  	{
  	    /* There are too many items.  Add the error code to the statusline
  	     * to give the user a hint about what went wrong. */
  	    if (p + 6 < out + outlen)
  	    {
  		mch_memmove(p, " E541", (size_t)5);
  		p += 5;
  	    }
  	    break;
  	}
  
  	if (*s != NUL && *s != '%')
  	    prevchar_isflag = prevchar_isitem = FALSE;
  
  	/*
  	 * Handle up to the next '%' or the end.
  	 */
  	while (*s != NUL && *s != '%' && p + 1 < out + outlen)
  	    *p++ = *s++;
  	if (*s == NUL || p + 1 >= out + outlen)
  	    break;
  
  	/*
  	 * Handle one '%' item.
  	 */
  	s++;
  	if (*s == NUL)  /* ignore trailing % */
  	    break;
  	if (*s == '%')
  	{
  	    if (p + 1 >= out + outlen)
  		break;
  	    *p++ = *s++;
  	    prevchar_isflag = prevchar_isitem = FALSE;
  	    continue;
  	}
  	if (*s == STL_MIDDLEMARK)
  	{
  	    s++;
  	    if (groupdepth > 0)
  		continue;
  	    item[curitem].type = Middle;
  	    item[curitem++].start = p;
  	    continue;
  	}
  	if (*s == STL_TRUNCMARK)
  	{
  	    s++;
  	    item[curitem].type = Trunc;
  	    item[curitem++].start = p;
  	    continue;
  	}
  	if (*s == ')')
  	{
  	    s++;
  	    if (groupdepth < 1)
  		continue;
  	    groupdepth--;
  
  	    t = item[groupitem[groupdepth]].start;
  	    *p = NUL;
  	    l = vim_strsize(t);
  	    if (curitem > groupitem[groupdepth] + 1
  		    && item[groupitem[groupdepth]].minwid == 0)
  	    {
  		/* remove group if all items are empty */
  		for (n = groupitem[groupdepth] + 1; n < curitem; n++)
  		    if (item[n].type == Normal)
  			break;
  		if (n == curitem)
  		{
  		    p = t;
  		    l = 0;
  		}
  	    }
  	    if (l > item[groupitem[groupdepth]].maxwid)
  	    {
  		/* truncate, remove n bytes of text at the start */
  #ifdef FEAT_MBYTE
  		if (has_mbyte)
  		{
  		    /* Find the first character that should be included. */
  		    n = 0;
  		    while (l >= item[groupitem[groupdepth]].maxwid)
  		    {
  			l -= ptr2cells(t + n);
  			n += (*mb_ptr2len)(t + n);
  		    }
  		}
  		else
  #endif
  		    n = (long)(p - t) - item[groupitem[groupdepth]].maxwid + 1;
  
  		*t = '<';
  		mch_memmove(t + 1, t + n, (size_t)(p - (t + n)));
  		p = p - n + 1;
  #ifdef FEAT_MBYTE
  		/* Fill up space left over by half a double-wide char. */
  		while (++l < item[groupitem[groupdepth]].minwid)
  		    *p++ = fillchar;
  #endif
  
  		/* correct the start of the items for the truncation */
  		for (l = groupitem[groupdepth] + 1; l < curitem; l++)
  		{
  		    item[l].start -= n;
  		    if (item[l].start < t)
  			item[l].start = t;
  		}
  	    }
  	    else if (abs(item[groupitem[groupdepth]].minwid) > l)
  	    {
  		/* fill */
  		n = item[groupitem[groupdepth]].minwid;
  		if (n < 0)
  		{
  		    /* fill by appending characters */
  		    n = 0 - n;
  		    while (l++ < n && p + 1 < out + outlen)
  			*p++ = fillchar;
  		}
  		else
  		{
  		    /* fill by inserting characters */
  		    mch_memmove(t + n - l, t, (size_t)(p - t));
  		    l = n - l;
  		    if (p + l >= out + outlen)
  			l = (long)((out + outlen) - p - 1);
  		    p += l;
  		    for (n = groupitem[groupdepth] + 1; n < curitem; n++)
  			item[n].start += l;
  		    for ( ; l > 0; l--)
  			*t++ = fillchar;
  		}
  	    }
  	    continue;
  	}
  	minwid = 0;
  	maxwid = 9999;
  	zeropad = FALSE;
  	l = 1;
  	if (*s == '0')
  	{
  	    s++;
  	    zeropad = TRUE;
  	}
  	if (*s == '-')
  	{
  	    s++;
  	    l = -1;
  	}
  	if (VIM_ISDIGIT(*s))
  	{
  	    minwid = (int)getdigits(&s);
  	    if (minwid < 0)	/* overflow */
  		minwid = 0;
  	}
  	if (*s == STL_USER_HL)
  	{
  	    item[curitem].type = Highlight;
  	    item[curitem].start = p;
  	    item[curitem].minwid = minwid > 9 ? 1 : minwid;
  	    s++;
  	    curitem++;
  	    continue;
  	}
  	if (*s == STL_TABPAGENR || *s == STL_TABCLOSENR)
  	{
  	    if (*s == STL_TABCLOSENR)
  	    {
  		if (minwid == 0)
  		{
  		    /* %X ends the close label, go back to the previously
  		     * define tab label nr. */
  		    for (n = curitem - 1; n >= 0; --n)
  			if (item[n].type == TabPage && item[n].minwid >= 0)
  			{
  			    minwid = item[n].minwid;
  			    break;
  			}
  		}
  		else
  		    /* close nrs are stored as negative values */
  		    minwid = - minwid;
  	    }
  	    item[curitem].type = TabPage;
  	    item[curitem].start = p;
  	    item[curitem].minwid = minwid;
  	    s++;
  	    curitem++;
  	    continue;
  	}
  	if (*s == '.')
  	{
  	    s++;
  	    if (VIM_ISDIGIT(*s))
  	    {
  		maxwid = (int)getdigits(&s);
  		if (maxwid <= 0)	/* overflow */
  		    maxwid = 50;
  	    }
  	}
  	minwid = (minwid > 50 ? 50 : minwid) * l;
  	if (*s == '(')
  	{
  	    groupitem[groupdepth++] = curitem;
  	    item[curitem].type = Group;
  	    item[curitem].start = p;
  	    item[curitem].minwid = minwid;
  	    item[curitem].maxwid = maxwid;
  	    s++;
  	    curitem++;
  	    continue;
  	}
  	if (vim_strchr(STL_ALL, *s) == NULL)
  	{
  	    s++;
  	    continue;
  	}
  	opt = *s++;
  
  	/* OK - now for the real work */
  	base = 'D';
  	itemisflag = FALSE;
  	fillable = TRUE;
  	num = -1;
  	str = NULL;
  	switch (opt)
  	{
  	case STL_FILEPATH:
  	case STL_FULLPATH:
  	case STL_FILENAME:
  	    fillable = FALSE;	/* don't change ' ' to fillchar */
  	    if (buf_spname(wp->w_buffer) != NULL)
  		STRCPY(NameBuff, buf_spname(wp->w_buffer));
  	    else
  	    {
  		t = (opt == STL_FULLPATH) ? wp->w_buffer->b_ffname
  					  : wp->w_buffer->b_fname;
  		home_replace(wp->w_buffer, t, NameBuff, MAXPATHL, TRUE);
  	    }
  	    trans_characters(NameBuff, MAXPATHL);
  	    if (opt != STL_FILENAME)
  		str = NameBuff;
  	    else
  		str = gettail(NameBuff);
  	    break;
  
  	case STL_VIM_EXPR: /* '{' */
  	    itemisflag = TRUE;
  	    t = p;
  	    while (*s != '}' && *s != NUL && p + 1 < out + outlen)
  		*p++ = *s++;
  	    if (*s != '}')	/* missing '}' or out of space */
  		break;
  	    s++;
  	    *p = 0;
  	    p = t;
  
  #ifdef FEAT_EVAL
  	    vim_snprintf((char *)tmp, sizeof(tmp), "%d", curbuf->b_fnum);
  	    set_internal_string_var((char_u *)"actual_curbuf", tmp);
  
  	    o_curbuf = curbuf;
  	    o_curwin = curwin;
  	    curwin = wp;
  	    curbuf = wp->w_buffer;
  
  	    str = eval_to_string_safe(p, &t, use_sandbox);
  
  	    curwin = o_curwin;
  	    curbuf = o_curbuf;
  	    do_unlet((char_u *)"g:actual_curbuf", TRUE);
  
  	    if (str != NULL && *str != 0)
  	    {
  		if (*skipdigits(str) == NUL)
  		{
  		    num = atoi((char *)str);
  		    vim_free(str);
  		    str = NULL;
  		    itemisflag = FALSE;
  		}
  	    }
  #endif
  	    break;
  
  	case STL_LINE:
  	    num = (wp->w_buffer->b_ml.ml_flags & ML_EMPTY)
  		  ? 0L : (long)(wp->w_cursor.lnum);
  	    break;
  
  	case STL_NUMLINES:
  	    num = wp->w_buffer->b_ml.ml_line_count;
  	    break;
  
  	case STL_COLUMN:
  	    num = !(State & INSERT) && empty_line
  		  ? 0 : (int)wp->w_cursor.col + 1;
  	    break;
  
  	case STL_VIRTCOL:
  	case STL_VIRTCOL_ALT:
  	    /* In list mode virtcol needs to be recomputed */
  	    virtcol = wp->w_virtcol;
  	    if (wp->w_p_list && lcs_tab1 == NUL)
  	    {
  		wp->w_p_list = FALSE;
  		getvcol(wp, &wp->w_cursor, NULL, &virtcol, NULL);
  		wp->w_p_list = TRUE;
  	    }
  	    ++virtcol;
  	    /* Don't display %V if it's the same as %c. */
  	    if (opt == STL_VIRTCOL_ALT
  		    && (virtcol == (colnr_T)(!(State & INSERT) && empty_line
  			    ? 0 : (int)wp->w_cursor.col + 1)))
  		break;
  	    num = (long)virtcol;
  	    break;
  
  	case STL_PERCENTAGE:
  	    num = (int)(((long)wp->w_cursor.lnum * 100L) /
  			(long)wp->w_buffer->b_ml.ml_line_count);
  	    break;
  
  	case STL_ALTPERCENT:
  	    str = tmp;
  	    get_rel_pos(wp, str, TMPLEN);
  	    break;
  
  	case STL_ARGLISTSTAT:
  	    fillable = FALSE;
  	    tmp[0] = 0;
  	    if (append_arg_number(wp, tmp, (int)sizeof(tmp), FALSE))
  		str = tmp;
  	    break;
  
  	case STL_KEYMAP:
  	    fillable = FALSE;
  	    if (get_keymap_str(wp, tmp, TMPLEN))
  		str = tmp;
  	    break;
  	case STL_PAGENUM:
  #if defined(FEAT_PRINTER) || defined(FEAT_GUI_TABLINE)
  	    num = printer_page_num;
  #else
  	    num = 0;
  #endif
  	    break;
  
  	case STL_BUFNO:
  	    num = wp->w_buffer->b_fnum;
  	    break;
  
  	case STL_OFFSET_X:
  	    base = 'X';
  	case STL_OFFSET:
  #ifdef FEAT_BYTEOFF
  	    l = ml_find_line_or_offset(wp->w_buffer, wp->w_cursor.lnum, NULL);
  	    num = (wp->w_buffer->b_ml.ml_flags & ML_EMPTY) || l < 0 ?
  		  0L : l + 1 + (!(State & INSERT) && empty_line ?
  				0 : (int)wp->w_cursor.col);
  #endif
  	    break;
  
  	case STL_BYTEVAL_X:
  	    base = 'X';
  	case STL_BYTEVAL:
  	    if (wp->w_cursor.col > (colnr_T)STRLEN(linecont))
  		num = 0;
  	    else
  	    {
  #ifdef FEAT_MBYTE
  		num = (*mb_ptr2char)(linecont + wp->w_cursor.col);
  #else
  		num = linecont[wp->w_cursor.col];
  #endif
  	    }
  	    if (num == NL)
  		num = 0;
  	    else if (num == CAR && get_fileformat(wp->w_buffer) == EOL_MAC)
  		num = NL;
  	    break;
  
  	case STL_ROFLAG:
  	case STL_ROFLAG_ALT:
  	    itemisflag = TRUE;
  	    if (wp->w_buffer->b_p_ro)
  		str = (char_u *)((opt == STL_ROFLAG_ALT) ? ",RO" : "[RO]");
  	    break;
  
  	case STL_HELPFLAG:
  	case STL_HELPFLAG_ALT:
  	    itemisflag = TRUE;
  	    if (wp->w_buffer->b_help)
  		str = (char_u *)((opt == STL_HELPFLAG_ALT) ? ",HLP"
  							       : _("[Help]"));
  	    break;
  
  #ifdef FEAT_AUTOCMD
  	case STL_FILETYPE:
  	    if (*wp->w_buffer->b_p_ft != NUL
  		    && STRLEN(wp->w_buffer->b_p_ft) < TMPLEN - 3)
  	    {
  		vim_snprintf((char *)tmp, sizeof(tmp), "[%s]",
  							wp->w_buffer->b_p_ft);
  		str = tmp;
  	    }
  	    break;
  
  	case STL_FILETYPE_ALT:
  	    itemisflag = TRUE;
  	    if (*wp->w_buffer->b_p_ft != NUL
  		    && STRLEN(wp->w_buffer->b_p_ft) < TMPLEN - 2)
  	    {
  		vim_snprintf((char *)tmp, sizeof(tmp), ",%s",
  							wp->w_buffer->b_p_ft);
  		for (t = tmp; *t != 0; t++)
  		    *t = TOUPPER_LOC(*t);
  		str = tmp;
  	    }
  	    break;
  #endif
  
  #if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
  	case STL_PREVIEWFLAG:
  	case STL_PREVIEWFLAG_ALT:
  	    itemisflag = TRUE;
  	    if (wp->w_p_pvw)
  		str = (char_u *)((opt == STL_PREVIEWFLAG_ALT) ? ",PRV"
  							    : _("[Preview]"));
  	    break;
  
  	case STL_QUICKFIX:
  	    if (bt_quickfix(wp->w_buffer))
  		str = (char_u *)(wp->w_llist_ref
  			    ? _(msg_loclist)
  			    : _(msg_qflist));
  	    break;
  #endif
  
  	case STL_MODIFIED:
  	case STL_MODIFIED_ALT:
  	    itemisflag = TRUE;
  	    switch ((opt == STL_MODIFIED_ALT)
  		    + bufIsChanged(wp->w_buffer) * 2
  		    + (!wp->w_buffer->b_p_ma) * 4)
  	    {
  		case 2: str = (char_u *)"[+]"; break;
  		case 3: str = (char_u *)",+"; break;
  		case 4: str = (char_u *)"[-]"; break;
  		case 5: str = (char_u *)",-"; break;
  		case 6: str = (char_u *)"[+-]"; break;
  		case 7: str = (char_u *)",+-"; break;
  	    }
  	    break;
  
  	case STL_HIGHLIGHT:
  	    t = s;
  	    while (*s != '#' && *s != NUL)
  		++s;
  	    if (*s == '#')
  	    {
  		item[curitem].type = Highlight;
  		item[curitem].start = p;
  		item[curitem].minwid = -syn_namen2id(t, (int)(s - t));
  		curitem++;
  	    }
  	    ++s;
  	    continue;
  	}
  
  	item[curitem].start = p;
  	item[curitem].type = Normal;
  	if (str != NULL && *str)
  	{
  	    t = str;
  	    if (itemisflag)
  	    {
  		if ((t[0] && t[1])
  			&& ((!prevchar_isitem && *t == ',')
  			      || (prevchar_isflag && *t == ' ')))
  		    t++;
  		prevchar_isflag = TRUE;
  	    }
  	    l = vim_strsize(t);
  	    if (l > 0)
  		prevchar_isitem = TRUE;
  	    if (l > maxwid)
  	    {
  		while (l >= maxwid)
  #ifdef FEAT_MBYTE
  		    if (has_mbyte)
  		    {
  			l -= ptr2cells(t);
  			t += (*mb_ptr2len)(t);
  		    }
  		    else
  #endif
  			l -= byte2cells(*t++);
  		if (p + 1 >= out + outlen)
  		    break;
  		*p++ = '<';
  	    }
  	    if (minwid > 0)
  	    {
  		for (; l < minwid && p + 1 < out + outlen; l++)
  		{
  		    /* Don't put a "-" in front of a digit. */
  		    if (l + 1 == minwid && fillchar == '-' && VIM_ISDIGIT(*t))
  			*p++ = ' ';
  		    else
  			*p++ = fillchar;
  		}
  		minwid = 0;
  	    }
  	    else
  		minwid *= -1;
  	    while (*t && p + 1 < out + outlen)
  	    {
  		*p++ = *t++;
  		/* Change a space by fillchar, unless fillchar is '-' and a
  		 * digit follows. */
  		if (fillable && p[-1] == ' '
  				     && (!VIM_ISDIGIT(*t) || fillchar != '-'))
  		    p[-1] = fillchar;
  	    }
  	    for (; l < minwid && p + 1 < out + outlen; l++)
  		*p++ = fillchar;
  	}
  	else if (num >= 0)
  	{
  	    int nbase = (base == 'D' ? 10 : (base == 'O' ? 8 : 16));
  	    char_u nstr[20];
  
  	    if (p + 20 >= out + outlen)
  		break;		/* not sufficient space */
  	    prevchar_isitem = TRUE;
  	    t = nstr;
  	    if (opt == STL_VIRTCOL_ALT)
  	    {
  		*t++ = '-';
  		minwid--;
  	    }
  	    *t++ = '%';
  	    if (zeropad)
  		*t++ = '0';
  	    *t++ = '*';
  	    *t++ = nbase == 16 ? base : (char_u)(nbase == 8 ? 'o' : 'd');
  	    *t = 0;
  
  	    for (n = num, l = 1; n >= nbase; n /= nbase)
  		l++;
  	    if (opt == STL_VIRTCOL_ALT)
  		l++;
  	    if (l > maxwid)
  	    {
  		l += 2;
  		n = l - maxwid;
  		while (l-- > maxwid)
  		    num /= nbase;
  		*t++ = '>';
  		*t++ = '%';
  		*t = t[-3];
  		*++t = 0;
  		vim_snprintf((char *)p, outlen - (p - out), (char *)nstr,
  								   0, num, n);
  	    }
  	    else
  		vim_snprintf((char *)p, outlen - (p - out), (char *)nstr,
  								 minwid, num);
  	    p += STRLEN(p);
  	}
  	else
  	    item[curitem].type = Empty;
  
  	if (opt == STL_VIM_EXPR)
  	    vim_free(str);
  
  	if (num >= 0 || (!itemisflag && str && *str))
  	    prevchar_isflag = FALSE;	    /* Item not NULL, but not a flag */
  	curitem++;
      }
      *p = NUL;
      itemcnt = curitem;
  
  #ifdef FEAT_EVAL
      if (usefmt != fmt)
  	vim_free(usefmt);
  #endif
  
      width = vim_strsize(out);
      if (maxwidth > 0 && width > maxwidth)
      {
  	/* Result is too long, must truncate somewhere. */
  	l = 0;
  	if (itemcnt == 0)
  	    s = out;
  	else
  	{
  	    for ( ; l < itemcnt; l++)
  		if (item[l].type == Trunc)
  		{
  		    /* Truncate at %< item. */
  		    s = item[l].start;
  		    break;
  		}
  	    if (l == itemcnt)
  	    {
  		/* No %< item, truncate first item. */
  		s = item[0].start;
  		l = 0;
  	    }
  	}
  
  	if (width - vim_strsize(s) >= maxwidth)
  	{
  	    /* Truncation mark is beyond max length */
  #ifdef FEAT_MBYTE
  	    if (has_mbyte)
  	    {
  		s = out;
  		width = 0;
  		for (;;)
  		{
  		    width += ptr2cells(s);
  		    if (width >= maxwidth)
  			break;
  		    s += (*mb_ptr2len)(s);
  		}
  		/* Fill up for half a double-wide character. */
  		while (++width < maxwidth)
  		    *s++ = fillchar;
  	    }
  	    else
  #endif
  		s = out + maxwidth - 1;
  	    for (l = 0; l < itemcnt; l++)
  		if (item[l].start > s)
  		    break;
  	    itemcnt = l;
  	    *s++ = '>';
  	    *s = 0;
  	}
  	else
  	{
  #ifdef FEAT_MBYTE
  	    if (has_mbyte)
  	    {
  		n = 0;
  		while (width >= maxwidth)
  		{
  		    width -= ptr2cells(s + n);
  		    n += (*mb_ptr2len)(s + n);
  		}
  	    }
  	    else
  #endif
  		n = width - maxwidth + 1;
  	    p = s + n;
  	    STRMOVE(s + 1, p);
  	    *s = '<';
  
  	    /* Fill up for half a double-wide character. */
  	    while (++width < maxwidth)
  	    {
  		s = s + STRLEN(s);
  		*s++ = fillchar;
  		*s = NUL;
  	    }
  
  	    --n;	/* count the '<' */
  	    for (; l < itemcnt; l++)
  	    {
  		if (item[l].start - n >= s)
  		    item[l].start -= n;
  		else
  		    item[l].start = s;
  	    }
  	}
  	width = maxwidth;
      }
      else if (width < maxwidth && STRLEN(out) + maxwidth - width + 1 < outlen)
      {
  	/* Apply STL_MIDDLE if any */
  	for (l = 0; l < itemcnt; l++)
  	    if (item[l].type == Middle)
  		break;
  	if (l < itemcnt)
  	{
  	    p = item[l].start + maxwidth - width;
  	    STRMOVE(p, item[l].start);
  	    for (s = item[l].start; s < p; s++)
  		*s = fillchar;
  	    for (l++; l < itemcnt; l++)
  		item[l].start += maxwidth - width;
  	    width = maxwidth;
  	}
      }
  
      /* Store the info about highlighting. */
      if (hltab != NULL)
      {
  	sp = hltab;
  	for (l = 0; l < itemcnt; l++)
  	{
  	    if (item[l].type == Highlight)
  	    {
  		sp->start = item[l].start;
  		sp->userhl = item[l].minwid;
  		sp++;
  	    }
  	}
  	sp->start = NULL;
  	sp->userhl = 0;
      }
  
      /* Store the info about tab pages labels. */
      if (tabtab != NULL)
      {
  	sp = tabtab;
  	for (l = 0; l < itemcnt; l++)
  	{
  	    if (item[l].type == TabPage)
  	    {
  		sp->start = item[l].start;
  		sp->userhl = item[l].minwid;
  		sp++;
  	    }
  	}
  	sp->start = NULL;
  	sp->userhl = 0;
      }
  
      return width;
  }
  #endif /* FEAT_STL_OPT */
  
  #if defined(FEAT_STL_OPT) || defined(FEAT_CMDL_INFO) \
  	    || defined(FEAT_GUI_TABLINE) || defined(PROTO)
  /*
   * Get relative cursor position in window into "buf[buflen]", in the form 99%,
   * using "Top", "Bot" or "All" when appropriate.
   */
      void
  get_rel_pos(wp, buf, buflen)
      win_T	*wp;
      char_u	*buf;
      int		buflen;
  {
      long	above; /* number of lines above window */
      long	below; /* number of lines below window */
  
      above = wp->w_topline - 1;
  #ifdef FEAT_DIFF
      above += diff_check_fill(wp, wp->w_topline) - wp->w_topfill;
  #endif
      below = wp->w_buffer->b_ml.ml_line_count - wp->w_botline + 1;
      if (below <= 0)
  	vim_strncpy(buf, (char_u *)(above == 0 ? _("All") : _("Bot")),
  							(size_t)(buflen - 1));
      else if (above <= 0)
  	vim_strncpy(buf, (char_u *)_("Top"), (size_t)(buflen - 1));
      else
  	vim_snprintf((char *)buf, (size_t)buflen, "%2d%%", above > 1000000L
  				    ? (int)(above / ((above + below) / 100L))
  				    : (int)(above * 100L / (above + below)));
  }
  #endif
  
  /*
   * Append (file 2 of 8) to "buf[buflen]", if editing more than one file.
   * Return TRUE if it was appended.
   */
      static int
  append_arg_number(wp, buf, buflen, add_file)
      win_T	*wp;
      char_u	*buf;
      int		buflen;
      int		add_file;	/* Add "file" before the arg number */
  {
      char_u	*p;
  
      if (ARGCOUNT <= 1)		/* nothing to do */
  	return FALSE;
  
      p = buf + STRLEN(buf);	/* go to the end of the buffer */
      if (p - buf + 35 >= buflen)	/* getting too long */
  	return FALSE;
      *p++ = ' ';
      *p++ = '(';
      if (add_file)
      {
  	STRCPY(p, "file ");
  	p += 5;
      }
      vim_snprintf((char *)p, (size_t)(buflen - (p - buf)),
  		wp->w_arg_idx_invalid ? "(%d) of %d)"
  				  : "%d of %d)", wp->w_arg_idx + 1, ARGCOUNT);
      return TRUE;
  }
  
  /*
   * If fname is not a full path, make it a full path.
   * Returns pointer to allocated memory (NULL for failure).
   */
      char_u  *
  fix_fname(fname)
      char_u  *fname;
  {
      /*
       * Force expanding the path always for Unix, because symbolic links may
       * mess up the full path name, even though it starts with a '/'.
       * Also expand when there is ".." in the file name, try to remove it,
       * because "c:/src/../README" is equal to "c:/README".
       * Similarly "c:/src//file" is equal to "c:/src/file".
       * For MS-Windows also expand names like "longna~1" to "longname".
       */
  #ifdef UNIX
      return FullName_save(fname, TRUE);
  #else
      if (!vim_isAbsName(fname)
  	    || strstr((char *)fname, "..") != NULL
  	    || strstr((char *)fname, "//") != NULL
  # ifdef BACKSLASH_IN_FILENAME
  	    || strstr((char *)fname, "\\\\") != NULL
  # endif
  # if defined(MSWIN) || defined(DJGPP)
  	    || vim_strchr(fname, '~') != NULL
  # endif
  	    )
  	return FullName_save(fname, FALSE);
  
      fname = vim_strsave(fname);
  
  # ifdef USE_FNAME_CASE
  #  ifdef USE_LONG_FNAME
      if (USE_LONG_FNAME)
  #  endif
      {
  	if (fname != NULL)
  	    fname_case(fname, 0);	/* set correct case for file name */
      }
  # endif
  
      return fname;
  #endif
  }
  
  /*
   * Make "ffname" a full file name, set "sfname" to "ffname" if not NULL.
   * "ffname" becomes a pointer to allocated memory (or NULL).
   */
      void
  fname_expand(buf, ffname, sfname)
      buf_T	*buf UNUSED;
      char_u	**ffname;
      char_u	**sfname;
  {
      if (*ffname == NULL)	/* if no file name given, nothing to do */
  	return;
      if (*sfname == NULL)	/* if no short file name given, use ffname */
  	*sfname = *ffname;
      *ffname = fix_fname(*ffname);   /* expand to full path */
  
  #ifdef FEAT_SHORTCUT
      if (!buf->b_p_bin)
      {
  	char_u  *rfname;
  
  	/* If the file name is a shortcut file, use the file it links to. */
  	rfname = mch_resolve_shortcut(*ffname);
  	if (rfname != NULL)
  	{
  	    vim_free(*ffname);
  	    *ffname = rfname;
  	    *sfname = rfname;
  	}
      }
  #endif
  }
  
  /*
   * Get the file name for an argument list entry.
   */
      char_u *
  alist_name(aep)
      aentry_T	*aep;
  {
      buf_T	*bp;
  
      /* Use the name from the associated buffer if it exists. */
      bp = buflist_findnr(aep->ae_fnum);
      if (bp == NULL || bp->b_fname == NULL)
  	return aep->ae_fname;
      return bp->b_fname;
  }
  
  #if defined(FEAT_WINDOWS) || defined(PROTO)
  /*
   * do_arg_all(): Open up to 'count' windows, one for each argument.
   */
      void
  do_arg_all(count, forceit, keep_tabs)
      int	count;
      int	forceit;		/* hide buffers in current windows */
      int keep_tabs;		/* keep current tabs, for ":tab drop file" */
  {
      int		i;
      win_T	*wp, *wpnext;
      char_u	*opened;	/* Array of weight for which args are open:
  				 *  0: not opened
  				 *  1: opened in other tab
  				 *  2: opened in curtab
  				 *  3: opened in curtab and curwin
  				 */
      int		opened_len;	/* length of opened[] */
      int		use_firstwin = FALSE;	/* use first window for arglist */
      int		split_ret = OK;
      int		p_ea_save;
      alist_T	*alist;		/* argument list to be used */
      buf_T	*buf;
      tabpage_T	*tpnext;
      int		had_tab = cmdmod.tab;
      win_T	*old_curwin, *last_curwin;
      tabpage_T	*old_curtab, *last_curtab;
      win_T	*new_curwin = NULL;
      tabpage_T	*new_curtab = NULL;
  
      if (ARGCOUNT <= 0)
      {
  	/* Don't give an error message.  We don't want it when the ":all"
  	 * command is in the .vimrc. */
  	return;
      }
      setpcmark();
  
      opened_len = ARGCOUNT;
      opened = alloc_clear((unsigned)opened_len);
      if (opened == NULL)
  	return;
  
      /* Autocommands may do anything to the argument list.  Make sure it's not
       * freed while we are working here by "locking" it.  We still have to
       * watch out for its size to be changed. */
      alist = curwin->w_alist;
      ++alist->al_refcount;
  
      old_curwin = curwin;
      old_curtab = curtab;
  
  #ifdef FEAT_GUI
      need_mouse_correct = TRUE;
  #endif
  
      /*
       * Try closing all windows that are not in the argument list.
       * Also close windows that are not full width;
       * When 'hidden' or "forceit" set the buffer becomes hidden.
       * Windows that have a changed buffer and can't be hidden won't be closed.
       * When the ":tab" modifier was used do this for all tab pages.
       */
      if (had_tab > 0)
  	goto_tabpage_tp(first_tabpage, TRUE);
      for (;;)
      {
  	tpnext = curtab->tp_next;
  	for (wp = firstwin; wp != NULL; wp = wpnext)
  	{
  	    wpnext = wp->w_next;
  	    buf = wp->w_buffer;
  	    if (buf->b_ffname == NULL
  		    || (!keep_tabs && buf->b_nwindows > 1)
  #ifdef FEAT_VERTSPLIT
  		    || wp->w_width != Columns
  #endif
  		    )
  		i = opened_len;
  	    else
  	    {
  		/* check if the buffer in this window is in the arglist */
  		for (i = 0; i < opened_len; ++i)
  		{
  		    if (i < alist->al_ga.ga_len
  			    && (AARGLIST(alist)[i].ae_fnum == buf->b_fnum
  				|| fullpathcmp(alist_name(&AARGLIST(alist)[i]),
  					      buf->b_ffname, TRUE) & FPC_SAME))
  		    {
  			int weight = 1;
  
  			if (old_curtab == curtab)
  			{
  			    ++weight;
  			    if (old_curwin == wp)
  				++weight;
  			}
  
  			if (weight > (int)opened[i])
  			{
  			    opened[i] = (char_u)weight;
  			    if (i == 0)
  			    {
  				if (new_curwin != NULL)
  				    new_curwin->w_arg_idx = opened_len;
  				new_curwin = wp;
  				new_curtab = curtab;
  			    }
  			}
  			else if (keep_tabs)
  			    i = opened_len;
  
  			if (wp->w_alist != alist)
  			{
  			    /* Use the current argument list for all windows
  			     * containing a file from it. */
  			    alist_unlink(wp->w_alist);
  			    wp->w_alist = alist;
  			    ++wp->w_alist->al_refcount;
  			}
  			break;
  		    }
  		}
  	    }
  	    wp->w_arg_idx = i;
  
  	    if (i == opened_len && !keep_tabs)/* close this window */
  	    {
  		if (P_HID(buf) || forceit || buf->b_nwindows > 1
  							|| !bufIsChanged(buf))
  		{
  		    /* If the buffer was changed, and we would like to hide it,
  		     * try autowriting. */
  		    if (!P_HID(buf) && buf->b_nwindows <= 1
  							 && bufIsChanged(buf))
  		    {
  			(void)autowrite(buf, FALSE);
  #ifdef FEAT_AUTOCMD
  			/* check if autocommands removed the window */
  			if (!win_valid(wp) || !buf_valid(buf))
  			{
  			    wpnext = firstwin;	/* start all over... */
  			    continue;
  			}
  #endif
  		    }
  #ifdef FEAT_WINDOWS
  		    /* don't close last window */
  		    if (firstwin == lastwin
  			    && (first_tabpage->tp_next == NULL || !had_tab))
  #endif
  			use_firstwin = TRUE;
  #ifdef FEAT_WINDOWS
  		    else
  		    {
  			win_close(wp, !P_HID(buf) && !bufIsChanged(buf));
  # ifdef FEAT_AUTOCMD
  			/* check if autocommands removed the next window */
  			if (!win_valid(wpnext))
  			    wpnext = firstwin;	/* start all over... */
  # endif
  		    }
  #endif
  		}
  	    }
  	}
  
  	/* Without the ":tab" modifier only do the current tab page. */
  	if (had_tab == 0 || tpnext == NULL)
  	    break;
  
  # ifdef FEAT_AUTOCMD
  	/* check if autocommands removed the next tab page */
  	if (!valid_tabpage(tpnext))
  	    tpnext = first_tabpage;	/* start all over...*/
  # endif
  	goto_tabpage_tp(tpnext, TRUE);
      }
  
      /*
       * Open a window for files in the argument list that don't have one.
       * ARGCOUNT may change while doing this, because of autocommands.
       */
      if (count > opened_len || count <= 0)
  	count = opened_len;
  
  #ifdef FEAT_AUTOCMD
      /* Don't execute Win/Buf Enter/Leave autocommands here. */
      ++autocmd_no_enter;
      ++autocmd_no_leave;
  #endif
      last_curwin = curwin;
      last_curtab = curtab;
      win_enter(lastwin, FALSE);
  #ifdef FEAT_WINDOWS
      /* ":drop all" should re-use an empty window to avoid "--remote-tab"
       * leaving an empty tab page when executed locally. */
      if (keep_tabs && bufempty() && curbuf->b_nwindows == 1
  			    && curbuf->b_ffname == NULL && !curbuf->b_changed)
  	use_firstwin = TRUE;
  #endif
  
      for (i = 0; i < count && i < opened_len && !got_int; ++i)
      {
  	if (alist == &global_alist && i == global_alist.al_ga.ga_len - 1)
  	    arg_had_last = TRUE;
  	if (opened[i] > 0)
  	{
  	    /* Move the already present window to below the current window */
  	    if (curwin->w_arg_idx != i)
  	    {
  		for (wpnext = firstwin; wpnext != NULL; wpnext = wpnext->w_next)
  		{
  		    if (wpnext->w_arg_idx == i)
  		    {
  			if (keep_tabs)
  			{
  			    new_curwin = wpnext;
  			    new_curtab = curtab;
  			}
  			else
  			    win_move_after(wpnext, curwin);
  			break;
  		    }
  		}
  	    }
  	}
  	else if (split_ret == OK)
  	{
  	    if (!use_firstwin)		/* split current window */
  	    {
  		p_ea_save = p_ea;
  		p_ea = TRUE;		/* use space from all windows */
  		split_ret = win_split(0, WSP_ROOM | WSP_BELOW);
  		p_ea = p_ea_save;
  		if (split_ret == FAIL)
  		    continue;
  	    }
  #ifdef FEAT_AUTOCMD
  	    else    /* first window: do autocmd for leaving this buffer */
  		--autocmd_no_leave;
  #endif
  
  	    /*
  	     * edit file "i"
  	     */
  	    curwin->w_arg_idx = i;
  	    if (i == 0)
  	    {
  		new_curwin = curwin;
  		new_curtab = curtab;
  	    }
  	    (void)do_ecmd(0, alist_name(&AARGLIST(alist)[i]), NULL, NULL,
  		      ECMD_ONE,
  		      ((P_HID(curwin->w_buffer)
  			   || bufIsChanged(curwin->w_buffer)) ? ECMD_HIDE : 0)
  						       + ECMD_OLDBUF, curwin);
  #ifdef FEAT_AUTOCMD
  	    if (use_firstwin)
  		++autocmd_no_leave;
  #endif
  	    use_firstwin = FALSE;
  	}
  	ui_breakcheck();
  
  	/* When ":tab" was used open a new tab for a new window repeatedly. */
  	if (had_tab > 0 && tabpage_index(NULL) <= p_tpm)
  	    cmdmod.tab = 9999;
      }
  
      /* Remove the "lock" on the argument list. */
      alist_unlink(alist);
  
  #ifdef FEAT_AUTOCMD
      --autocmd_no_enter;
  #endif
      /* restore last referenced tabpage's curwin */
      if (last_curtab != new_curtab)
      {
  	if (valid_tabpage(last_curtab))
  	    goto_tabpage_tp(last_curtab, TRUE);
  	if (win_valid(last_curwin))
  	    win_enter(last_curwin, FALSE);
      }
      /* to window with first arg */
      if (valid_tabpage(new_curtab))
  	goto_tabpage_tp(new_curtab, TRUE);
      if (win_valid(new_curwin))
  	win_enter(new_curwin, FALSE);
  
  #ifdef FEAT_AUTOCMD
      --autocmd_no_leave;
  #endif
      vim_free(opened);
  }
  
  # if defined(FEAT_LISTCMDS) || defined(PROTO)
  /*
   * Open a window for a number of buffers.
   */
      void
  ex_buffer_all(eap)
      exarg_T	*eap;
  {
      buf_T	*buf;
      win_T	*wp, *wpnext;
      int		split_ret = OK;
      int		p_ea_save;
      int		open_wins = 0;
      int		r;
      int		count;		/* Maximum number of windows to open. */
      int		all;		/* When TRUE also load inactive buffers. */
  #ifdef FEAT_WINDOWS
      int		had_tab = cmdmod.tab;
      tabpage_T	*tpnext;
  #endif
  
      if (eap->addr_count == 0)	/* make as many windows as possible */
  	count = 9999;
      else
  	count = eap->line2;	/* make as many windows as specified */
      if (eap->cmdidx == CMD_unhide || eap->cmdidx == CMD_sunhide)
  	all = FALSE;
      else
  	all = TRUE;
  
      setpcmark();
  
  #ifdef FEAT_GUI
      need_mouse_correct = TRUE;
  #endif
  
      /*
       * Close superfluous windows (two windows for the same buffer).
       * Also close windows that are not full-width.
       */
  #ifdef FEAT_WINDOWS
      if (had_tab > 0)
  	goto_tabpage_tp(first_tabpage, TRUE);
      for (;;)
      {
  #endif
  	tpnext = curtab->tp_next;
  	for (wp = firstwin; wp != NULL; wp = wpnext)
  	{
  	    wpnext = wp->w_next;
  	    if ((wp->w_buffer->b_nwindows > 1
  #ifdef FEAT_VERTSPLIT
  		    || ((cmdmod.split & WSP_VERT)
  			? wp->w_height + wp->w_status_height < Rows - p_ch
  							    - tabline_height()
  			: wp->w_width != Columns)
  #endif
  #ifdef FEAT_WINDOWS
  		    || (had_tab > 0 && wp != firstwin)
  #endif
  		    ) && firstwin != lastwin
  #ifdef FEAT_AUTOCMD
  		    && !(wp->w_closing || wp->w_buffer->b_closing)
  #endif
  		    )
  	    {
  		win_close(wp, FALSE);
  #ifdef FEAT_AUTOCMD
  		wpnext = firstwin;	/* just in case an autocommand does
  					   something strange with windows */
  		tpnext = first_tabpage;	/* start all over...*/
  		open_wins = 0;
  #endif
  	    }
  	    else
  		++open_wins;
  	}
  
  #ifdef FEAT_WINDOWS
  	/* Without the ":tab" modifier only do the current tab page. */
  	if (had_tab == 0 || tpnext == NULL)
  	    break;
  	goto_tabpage_tp(tpnext, TRUE);
      }
  #endif
  
      /*
       * Go through the buffer list.  When a buffer doesn't have a window yet,
       * open one.  Otherwise move the window to the right position.
       * Watch out for autocommands that delete buffers or windows!
       */
  #ifdef FEAT_AUTOCMD
      /* Don't execute Win/Buf Enter/Leave autocommands here. */
      ++autocmd_no_enter;
  #endif
      win_enter(lastwin, FALSE);
  #ifdef FEAT_AUTOCMD
      ++autocmd_no_leave;
  #endif
      for (buf = firstbuf; buf != NULL && open_wins < count; buf = buf->b_next)
      {
  	/* Check if this buffer needs a window */
  	if ((!all && buf->b_ml.ml_mfp == NULL) || !buf->b_p_bl)
  	    continue;
  
  #ifdef FEAT_WINDOWS
  	if (had_tab != 0)
  	{
  	    /* With the ":tab" modifier don't move the window. */
  	    if (buf->b_nwindows > 0)
  		wp = lastwin;	    /* buffer has a window, skip it */
  	    else
  		wp = NULL;
  	}
  	else
  #endif
  	{
  	    /* Check if this buffer already has a window */
  	    for (wp = firstwin; wp != NULL; wp = wp->w_next)
  		if (wp->w_buffer == buf)
  		    break;
  	    /* If the buffer already has a window, move it */
  	    if (wp != NULL)
  		win_move_after(wp, curwin);
  	}
  
  	if (wp == NULL && split_ret == OK)
  	{
  	    /* Split the window and put the buffer in it */
  	    p_ea_save = p_ea;
  	    p_ea = TRUE;		/* use space from all windows */
  	    split_ret = win_split(0, WSP_ROOM | WSP_BELOW);
  	    ++open_wins;
  	    p_ea = p_ea_save;
  	    if (split_ret == FAIL)
  		continue;
  
  	    /* Open the buffer in this window. */
  #if defined(HAS_SWAP_EXISTS_ACTION)
  	    swap_exists_action = SEA_DIALOG;
  #endif
  	    set_curbuf(buf, DOBUF_GOTO);
  #ifdef FEAT_AUTOCMD
  	    if (!buf_valid(buf))	/* autocommands deleted the buffer!!! */
  	    {
  #if defined(HAS_SWAP_EXISTS_ACTION)
  		swap_exists_action = SEA_NONE;
  # endif
  		break;
  	    }
  #endif
  #if defined(HAS_SWAP_EXISTS_ACTION)
  	    if (swap_exists_action == SEA_QUIT)
  	    {
  # if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  		cleanup_T   cs;
  
  		/* Reset the error/interrupt/exception state here so that
  		 * aborting() returns FALSE when closing a window. */
  		enter_cleanup(&cs);
  # endif
  
  		/* User selected Quit at ATTENTION prompt; close this window. */
  		win_close(curwin, TRUE);
  		--open_wins;
  		swap_exists_action = SEA_NONE;
  		swap_exists_did_quit = TRUE;
  
  # if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
  		/* Restore the error/interrupt/exception state if not
  		 * discarded by a new aborting error, interrupt, or uncaught
  		 * exception. */
  		leave_cleanup(&cs);
  # endif
  	    }
  	    else
  		handle_swap_exists(NULL);
  #endif
  	}
  
  	ui_breakcheck();
  	if (got_int)
  	{
  	    (void)vgetc();	/* only break the file loading, not the rest */
  	    break;
  	}
  #ifdef FEAT_EVAL
  	/* Autocommands deleted the buffer or aborted script processing!!! */
  	if (aborting())
  	    break;
  #endif
  #ifdef FEAT_WINDOWS
  	/* When ":tab" was used open a new tab for a new window repeatedly. */
  	if (had_tab > 0 && tabpage_index(NULL) <= p_tpm)
  	    cmdmod.tab = 9999;
  #endif
      }
  #ifdef FEAT_AUTOCMD
      --autocmd_no_enter;
  #endif
      win_enter(firstwin, FALSE);		/* back to first window */
  #ifdef FEAT_AUTOCMD
      --autocmd_no_leave;
  #endif
  
      /*
       * Close superfluous windows.
       */
      for (wp = lastwin; open_wins > count; )
      {
  	r = (P_HID(wp->w_buffer) || !bufIsChanged(wp->w_buffer)
  				     || autowrite(wp->w_buffer, FALSE) == OK);
  #ifdef FEAT_AUTOCMD
  	if (!win_valid(wp))
  	{
  	    /* BufWrite Autocommands made the window invalid, start over */
  	    wp = lastwin;
  	}
  	else
  #endif
  	    if (r)
  	{
  	    win_close(wp, !P_HID(wp->w_buffer));
  	    --open_wins;
  	    wp = lastwin;
  	}
  	else
  	{
  	    wp = wp->w_prev;
  	    if (wp == NULL)
  		break;
  	}
      }
  }
  # endif /* FEAT_LISTCMDS */
  
  #endif /* FEAT_WINDOWS */
  
  static int  chk_modeline __ARGS((linenr_T, int));
  
  /*
   * do_modelines() - process mode lines for the current file
   *
   * "flags" can be:
   * OPT_WINONLY	    only set options local to window
   * OPT_NOWIN	    don't set options local to window
   *
   * Returns immediately if the "ml" option isn't set.
   */
      void
  do_modelines(flags)
      int		flags;
  {
      linenr_T	lnum;
      int		nmlines;
      static int	entered = 0;
  
      if (!curbuf->b_p_ml || (nmlines = (int)p_mls) == 0)
  	return;
  
      /* Disallow recursive entry here.  Can happen when executing a modeline
       * triggers an autocommand, which reloads modelines with a ":do". */
      if (entered)
  	return;
  
      ++entered;
      for (lnum = 1; lnum <= curbuf->b_ml.ml_line_count && lnum <= nmlines;
  								       ++lnum)
  	if (chk_modeline(lnum, flags) == FAIL)
  	    nmlines = 0;
  
      for (lnum = curbuf->b_ml.ml_line_count; lnum > 0 && lnum > nmlines
  		       && lnum > curbuf->b_ml.ml_line_count - nmlines; --lnum)
  	if (chk_modeline(lnum, flags) == FAIL)
  	    nmlines = 0;
      --entered;
  }
  
  #include "version.h"		/* for version number */
  
  /*
   * chk_modeline() - check a single line for a mode string
   * Return FAIL if an error encountered.
   */
      static int
  chk_modeline(lnum, flags)
      linenr_T	lnum;
      int		flags;		/* Same as for do_modelines(). */
  {
      char_u	*s;
      char_u	*e;
      char_u	*linecopy;		/* local copy of any modeline found */
      int		prev;
      int		vers;
      int		end;
      int		retval = OK;
      char_u	*save_sourcing_name;
      linenr_T	save_sourcing_lnum;
  #ifdef FEAT_EVAL
      scid_T	save_SID;
  #endif
  
      prev = -1;
      for (s = ml_get(lnum); *s != NUL; ++s)
      {
  	if (prev == -1 || vim_isspace(prev))
  	{
  	    if ((prev != -1 && STRNCMP(s, "ex:", (size_t)3) == 0)
  		    || STRNCMP(s, "vi:", (size_t)3) == 0)
  		break;
  	    if (STRNCMP(s, "vim", 3) == 0)
  	    {
  		if (s[3] == '<' || s[3] == '=' || s[3] == '>')
  		    e = s + 4;
  		else
  		    e = s + 3;
  		vers = getdigits(&e);
  		if (*e == ':'
  			&& (s[3] == ':'
  			    || (VIM_VERSION_100 >= vers && isdigit(s[3]))
  			    || (VIM_VERSION_100 < vers && s[3] == '<')
  			    || (VIM_VERSION_100 > vers && s[3] == '>')
  			    || (VIM_VERSION_100 == vers && s[3] == '=')))
  		    break;
  	    }
  	}
  	prev = *s;
      }
  
      if (*s)
      {
  	do				/* skip over "ex:", "vi:" or "vim:" */
  	    ++s;
  	while (s[-1] != ':');
  
  	s = linecopy = vim_strsave(s);	/* copy the line, it will change */
  	if (linecopy == NULL)
  	    return FAIL;
  
  	save_sourcing_lnum = sourcing_lnum;
  	save_sourcing_name = sourcing_name;
  	sourcing_lnum = lnum;		/* prepare for emsg() */
  	sourcing_name = (char_u *)"modelines";
  
  	end = FALSE;
  	while (end == FALSE)
  	{
  	    s = skipwhite(s);
  	    if (*s == NUL)
  		break;
  
  	    /*
  	     * Find end of set command: ':' or end of line.
  	     * Skip over "\:", replacing it with ":".
  	     */
  	    for (e = s; *e != ':' && *e != NUL; ++e)
  		if (e[0] == '\\' && e[1] == ':')
  		    STRMOVE(e, e + 1);
  	    if (*e == NUL)
  		end = TRUE;
  
  	    /*
  	     * If there is a "set" command, require a terminating ':' and
  	     * ignore the stuff after the ':'.
  	     * "vi:set opt opt opt: foo" -- foo not interpreted
  	     * "vi:opt opt opt: foo" -- foo interpreted
  	     * Accept "se" for compatibility with Elvis.
  	     */
  	    if (STRNCMP(s, "set ", (size_t)4) == 0
  		    || STRNCMP(s, "se ", (size_t)3) == 0)
  	    {
  		if (*e != ':')		/* no terminating ':'? */
  		    break;
  		end = TRUE;
  		s = vim_strchr(s, ' ') + 1;
  	    }
  	    *e = NUL;			/* truncate the set command */
  
  	    if (*s != NUL)		/* skip over an empty "::" */
  	    {
  #ifdef FEAT_EVAL
  		save_SID = current_SID;
  		current_SID = SID_MODELINE;
  #endif
  		retval = do_set(s, OPT_MODELINE | OPT_LOCAL | flags);
  #ifdef FEAT_EVAL
  		current_SID = save_SID;
  #endif
  		if (retval == FAIL)		/* stop if error found */
  		    break;
  	    }
  	    s = e + 1;			/* advance to next part */
  	}
  
  	sourcing_lnum = save_sourcing_lnum;
  	sourcing_name = save_sourcing_name;
  
  	vim_free(linecopy);
      }
      return retval;
  }
  
  #if defined(FEAT_VIMINFO) || defined(PROTO)
      int
  read_viminfo_bufferlist(virp, writing)
      vir_T	*virp;
      int		writing;
  {
      char_u	*tab;
      linenr_T	lnum;
      colnr_T	col;
      buf_T	*buf;
      char_u	*sfname;
      char_u	*xline;
  
      /* Handle long line and escaped characters. */
      xline = viminfo_readstring(virp, 1, FALSE);
  
      /* don't read in if there are files on the command-line or if writing: */
      if (xline != NULL && !writing && ARGCOUNT == 0
  				       && find_viminfo_parameter('%') != NULL)
      {
  	/* Format is: <fname> Tab <lnum> Tab <col>.
  	 * Watch out for a Tab in the file name, work from the end. */
  	lnum = 0;
  	col = 0;
  	tab = vim_strrchr(xline, '\t');
  	if (tab != NULL)
  	{
  	    *tab++ = '\0';
  	    col = (colnr_T)atoi((char *)tab);
  	    tab = vim_strrchr(xline, '\t');
  	    if (tab != NULL)
  	    {
  		*tab++ = '\0';
  		lnum = atol((char *)tab);
  	    }
  	}
  
  	/* Expand "~/" in the file name at "line + 1" to a full path.
  	 * Then try shortening it by comparing with the current directory */
  	expand_env(xline, NameBuff, MAXPATHL);
  	sfname = shorten_fname1(NameBuff);
  
  	buf = buflist_new(NameBuff, sfname, (linenr_T)0, BLN_LISTED);
  	if (buf != NULL)	/* just in case... */
  	{
  	    buf->b_last_cursor.lnum = lnum;
  	    buf->b_last_cursor.col = col;
  	    buflist_setfpos(buf, curwin, lnum, col, FALSE);
  	}
      }
      vim_free(xline);
  
      return viminfo_readline(virp);
  }
  
      void
  write_viminfo_bufferlist(fp)
      FILE    *fp;
  {
      buf_T	*buf;
  #ifdef FEAT_WINDOWS
      win_T	*win;
      tabpage_T	*tp;
  #endif
      char_u	*line;
      int		max_buffers;
  
      if (find_viminfo_parameter('%') == NULL)
  	return;
  
      /* Without a number -1 is returned: do all buffers. */
      max_buffers = get_viminfo_parameter('%');
  
      /* Allocate room for the file name, lnum and col. */
  #define LINE_BUF_LEN (MAXPATHL + 40)
      line = alloc(LINE_BUF_LEN);
      if (line == NULL)
  	return;
  
  #ifdef FEAT_WINDOWS
      FOR_ALL_TAB_WINDOWS(tp, win)
  	set_last_cursor(win);
  #else
      set_last_cursor(curwin);
  #endif
  
      fputs(_("\n# Buffer list:\n"), fp);
      for (buf = firstbuf; buf != NULL ; buf = buf->b_next)
      {
  	if (buf->b_fname == NULL
  		|| !buf->b_p_bl
  #ifdef FEAT_QUICKFIX
  		|| bt_quickfix(buf)
  #endif
  		|| removable(buf->b_ffname))
  	    continue;
  
  	if (max_buffers-- == 0)
  	    break;
  	putc('%', fp);
  	home_replace(NULL, buf->b_ffname, line, MAXPATHL, TRUE);
  	vim_snprintf_add((char *)line, LINE_BUF_LEN, "\t%ld\t%d",
  			(long)buf->b_last_cursor.lnum,
  			buf->b_last_cursor.col);
  	viminfo_writestring(fp, line);
      }
      vim_free(line);
  }
  #endif
  
  
  /*
   * Return special buffer name.
   * Returns NULL when the buffer has a normal file name.
   */
      char *
  buf_spname(buf)
      buf_T	*buf;
  {
  #if defined(FEAT_QUICKFIX) && defined(FEAT_WINDOWS)
      if (bt_quickfix(buf))
      {
  	win_T	    *win = NULL;
  	tabpage_T   *tp;
  
  	/*
  	 * For location list window, w_llist_ref points to the location list.
  	 * For quickfix window, w_llist_ref is NULL.
  	 */
  	FOR_ALL_TAB_WINDOWS(tp, win)
  	    if (win->w_buffer == buf)
  		goto win_found;
  win_found:
  	if (win != NULL && win->w_llist_ref != NULL)
  	    return _(msg_loclist);
  	else
  	    return _(msg_qflist);
      }
  #endif
  #ifdef FEAT_QUICKFIX
      /* There is no _file_ when 'buftype' is "nofile", b_sfname
       * contains the name as specified by the user */
      if (bt_nofile(buf))
      {
  	if (buf->b_sfname != NULL)
  	    return (char *)buf->b_sfname;
  	return _("[Scratch]");
      }
  #endif
      if (buf->b_fname == NULL)
  	return _("[No Name]");
      return NULL;
  }
  
  
  #if defined(FEAT_SIGNS) || defined(PROTO)
  /*
   * Insert the sign into the signlist.
   */
      static void
  insert_sign(buf, prev, next, id, lnum, typenr)
      buf_T	*buf;		/* buffer to store sign in */
      signlist_T	*prev;		/* previous sign entry */
      signlist_T	*next;		/* next sign entry */
      int		id;		/* sign ID */
      linenr_T	lnum;		/* line number which gets the mark */
      int		typenr;		/* typenr of sign we are adding */
  {
      signlist_T	*newsign;
  
      newsign = (signlist_T *)lalloc((long_u)sizeof(signlist_T), FALSE);
      if (newsign != NULL)
      {
  	newsign->id = id;
  	newsign->lnum = lnum;
  	newsign->typenr = typenr;
  	newsign->next = next;
  #ifdef FEAT_NETBEANS_INTG
  	newsign->prev = prev;
  	if (next != NULL)
  	    next->prev = newsign;
  #endif
  
  	if (prev == NULL)
  	{
  	    /* When adding first sign need to redraw the windows to create the
  	     * column for signs. */
  	    if (buf->b_signlist == NULL)
  	    {
  		redraw_buf_later(buf, NOT_VALID);
  		changed_cline_bef_curs();
  	    }
  
  	    /* first sign in signlist */
  	    buf->b_signlist = newsign;
  	}
  	else
  	    prev->next = newsign;
      }
  }
  
  /*
   * Add the sign into the signlist. Find the right spot to do it though.
   */
      void
  buf_addsign(buf, id, lnum, typenr)
      buf_T	*buf;		/* buffer to store sign in */
      int		id;		/* sign ID */
      linenr_T	lnum;		/* line number which gets the mark */
      int		typenr;		/* typenr of sign we are adding */
  {
      signlist_T	*sign;		/* a sign in the signlist */
      signlist_T	*prev;		/* the previous sign */
  
      prev = NULL;
      for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
      {
  	if (lnum == sign->lnum && id == sign->id)
  	{
  	    sign->typenr = typenr;
  	    return;
  	}
  	else if (
  #ifndef FEAT_NETBEANS_INTG  /* keep signs sorted by lnum */
  		   id < 0 &&
  #endif
  			     lnum < sign->lnum)
  	{
  #ifdef FEAT_NETBEANS_INTG /* insert new sign at head of list for this lnum */
  	    /* XXX - GRP: Is this because of sign slide problem? Or is it
  	     * really needed? Or is it because we allow multiple signs per
  	     * line? If so, should I add that feature to FEAT_SIGNS?
  	     */
  	    while (prev != NULL && prev->lnum == lnum)
  		prev = prev->prev;
  	    if (prev == NULL)
  		sign = buf->b_signlist;
  	    else
  		sign = prev->next;
  #endif
  	    insert_sign(buf, prev, sign, id, lnum, typenr);
  	    return;
  	}
  	prev = sign;
      }
  #ifdef FEAT_NETBEANS_INTG /* insert new sign at head of list for this lnum */
      /* XXX - GRP: See previous comment */
      while (prev != NULL && prev->lnum == lnum)
  	prev = prev->prev;
      if (prev == NULL)
  	sign = buf->b_signlist;
      else
  	sign = prev->next;
  #endif
      insert_sign(buf, prev, sign, id, lnum, typenr);
  
      return;
  }
  
      linenr_T
  buf_change_sign_type(buf, markId, typenr)
      buf_T	*buf;		/* buffer to store sign in */
      int		markId;		/* sign ID */
      int		typenr;		/* typenr of sign we are adding */
  {
      signlist_T	*sign;		/* a sign in the signlist */
  
      for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
      {
  	if (sign->id == markId)
  	{
  	    sign->typenr = typenr;
  	    return sign->lnum;
  	}
      }
  
      return (linenr_T)0;
  }
  
      int
  buf_getsigntype(buf, lnum, type)
      buf_T	*buf;
      linenr_T	lnum;
      int		type;	/* SIGN_ICON, SIGN_TEXT, SIGN_ANY, SIGN_LINEHL */
  {
      signlist_T	*sign;		/* a sign in a b_signlist */
  
      for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
  	if (sign->lnum == lnum
  		&& (type == SIGN_ANY
  # ifdef FEAT_SIGN_ICONS
  		    || (type == SIGN_ICON
  			&& sign_get_image(sign->typenr) != NULL)
  # endif
  		    || (type == SIGN_TEXT
  			&& sign_get_text(sign->typenr) != NULL)
  		    || (type == SIGN_LINEHL
  			&& sign_get_attr(sign->typenr, TRUE) != 0)))
  	    return sign->typenr;
      return 0;
  }
  
  
      linenr_T
  buf_delsign(buf, id)
      buf_T	*buf;		/* buffer sign is stored in */
      int		id;		/* sign id */
  {
      signlist_T	**lastp;	/* pointer to pointer to current sign */
      signlist_T	*sign;		/* a sign in a b_signlist */
      signlist_T	*next;		/* the next sign in a b_signlist */
      linenr_T	lnum;		/* line number whose sign was deleted */
  
      lastp = &buf->b_signlist;
      lnum = 0;
      for (sign = buf->b_signlist; sign != NULL; sign = next)
      {
  	next = sign->next;
  	if (sign->id == id)
  	{
  	    *lastp = next;
  #ifdef FEAT_NETBEANS_INTG
  	    if (next != NULL)
  		next->prev = sign->prev;
  #endif
  	    lnum = sign->lnum;
  	    vim_free(sign);
  	    break;
  	}
  	else
  	    lastp = &sign->next;
      }
  
      /* When deleted the last sign need to redraw the windows to remove the
       * sign column. */
      if (buf->b_signlist == NULL)
      {
  	redraw_buf_later(buf, NOT_VALID);
  	changed_cline_bef_curs();
      }
  
      return lnum;
  }
  
  
  /*
   * Find the line number of the sign with the requested id. If the sign does
   * not exist, return 0 as the line number. This will still let the correct file
   * get loaded.
   */
      int
  buf_findsign(buf, id)
      buf_T	*buf;		/* buffer to store sign in */
      int		id;		/* sign ID */
  {
      signlist_T	*sign;		/* a sign in the signlist */
  
      for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
  	if (sign->id == id)
  	    return sign->lnum;
  
      return 0;
  }
  
      int
  buf_findsign_id(buf, lnum)
      buf_T	*buf;		/* buffer whose sign we are searching for */
      linenr_T	lnum;		/* line number of sign */
  {
      signlist_T	*sign;		/* a sign in the signlist */
  
      for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
  	if (sign->lnum == lnum)
  	    return sign->id;
  
      return 0;
  }
  
  
  # if defined(FEAT_NETBEANS_INTG) || defined(PROTO)
  /* see if a given type of sign exists on a specific line */
      int
  buf_findsigntype_id(buf, lnum, typenr)
      buf_T	*buf;		/* buffer whose sign we are searching for */
      linenr_T	lnum;		/* line number of sign */
      int		typenr;		/* sign type number */
  {
      signlist_T	*sign;		/* a sign in the signlist */
  
      for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
  	if (sign->lnum == lnum && sign->typenr == typenr)
  	    return sign->id;
  
      return 0;
  }
  
  
  #  if defined(FEAT_SIGN_ICONS) || defined(PROTO)
  /* return the number of icons on the given line */
      int
  buf_signcount(buf, lnum)
      buf_T	*buf;
      linenr_T	lnum;
  {
      signlist_T	*sign;		/* a sign in the signlist */
      int		count = 0;
  
      for (sign = buf->b_signlist; sign != NULL; sign = sign->next)
  	if (sign->lnum == lnum)
  	    if (sign_get_image(sign->typenr) != NULL)
  		count++;
  
      return count;
  }
  #  endif /* FEAT_SIGN_ICONS */
  # endif /* FEAT_NETBEANS_INTG */
  
  
  /*
   * Delete signs in buffer "buf".
   */
      void
  buf_delete_signs(buf)
      buf_T	*buf;
  {
      signlist_T	*next;
  
      while (buf->b_signlist != NULL)
      {
  	next = buf->b_signlist->next;
  	vim_free(buf->b_signlist);
  	buf->b_signlist = next;
      }
  }
  
  /*
   * Delete all signs in all buffers.
   */
      void
  buf_delete_all_signs()
  {
      buf_T	*buf;		/* buffer we are checking for signs */
  
      for (buf = firstbuf; buf != NULL; buf = buf->b_next)
  	if (buf->b_signlist != NULL)
  	{
  	    /* Need to redraw the windows to remove the sign column. */
  	    redraw_buf_later(buf, NOT_VALID);
  	    buf_delete_signs(buf);
  	}
  }
  
  /*
   * List placed signs for "rbuf".  If "rbuf" is NULL do it for all buffers.
   */
      void
  sign_list_placed(rbuf)
      buf_T	*rbuf;
  {
      buf_T	*buf;
      signlist_T	*p;
      char	lbuf[BUFSIZ];
  
      MSG_PUTS_TITLE(_("\n--- Signs ---"));
      msg_putchar('\n');
      if (rbuf == NULL)
  	buf = firstbuf;
      else
  	buf = rbuf;
      while (buf != NULL && !got_int)
      {
  	if (buf->b_signlist != NULL)
  	{
  	    vim_snprintf(lbuf, BUFSIZ, _("Signs for %s:"), buf->b_fname);
  	    MSG_PUTS_ATTR(lbuf, hl_attr(HLF_D));
  	    msg_putchar('\n');
  	}
  	for (p = buf->b_signlist; p != NULL && !got_int; p = p->next)
  	{
  	    vim_snprintf(lbuf, BUFSIZ, _("    line=%ld  id=%d  name=%s"),
  			   (long)p->lnum, p->id, sign_typenr2name(p->typenr));
  	    MSG_PUTS(lbuf);
  	    msg_putchar('\n');
  	}
  	if (rbuf != NULL)
  	    break;
  	buf = buf->b_next;
      }
  }
  
  /*
   * Adjust a placed sign for inserted/deleted lines.
   */
      void
  sign_mark_adjust(line1, line2, amount, amount_after)
      linenr_T	line1;
      linenr_T	line2;
      long	amount;
      long	amount_after;
  {
      signlist_T	*sign;		/* a sign in a b_signlist */
  
      for (sign = curbuf->b_signlist; sign != NULL; sign = sign->next)
      {
  	if (sign->lnum >= line1 && sign->lnum <= line2)
  	{
  	    if (amount == MAXLNUM)
  		sign->lnum = line1;
  	    else
  		sign->lnum += amount;
  	}
  	else if (sign->lnum > line2)
  	    sign->lnum += amount_after;
      }
  }
  #endif /* FEAT_SIGNS */
  
  /*
   * Set 'buflisted' for curbuf to "on" and trigger autocommands if it changed.
   */
      void
  set_buflisted(on)
      int		on;
  {
      if (on != curbuf->b_p_bl)
      {
  	curbuf->b_p_bl = on;
  #ifdef FEAT_AUTOCMD
  	if (on)
  	    apply_autocmds(EVENT_BUFADD, NULL, NULL, FALSE, curbuf);
  	else
  	    apply_autocmds(EVENT_BUFDELETE, NULL, NULL, FALSE, curbuf);
  #endif
      }
  }
  
  /*
   * Read the file for "buf" again and check if the contents changed.
   * Return TRUE if it changed or this could not be checked.
   */
      int
  buf_contents_changed(buf)
      buf_T	*buf;
  {
      buf_T	*newbuf;
      int		differ = TRUE;
      linenr_T	lnum;
      aco_save_T	aco;
      exarg_T	ea;
  
      /* Allocate a buffer without putting it in the buffer list. */
      newbuf = buflist_new(NULL, NULL, (linenr_T)1, BLN_DUMMY);
      if (newbuf == NULL)
  	return TRUE;
  
      /* Force the 'fileencoding' and 'fileformat' to be equal. */
      if (prep_exarg(&ea, buf) == FAIL)
      {
  	wipe_buffer(newbuf, FALSE);
  	return TRUE;
      }
  
      /* set curwin/curbuf to buf and save a few things */
      aucmd_prepbuf(&aco, newbuf);
  
      if (ml_open(curbuf) == OK
  	    && readfile(buf->b_ffname, buf->b_fname,
  				  (linenr_T)0, (linenr_T)0, (linenr_T)MAXLNUM,
  					    &ea, READ_NEW | READ_DUMMY) == OK)
      {
  	/* compare the two files line by line */
  	if (buf->b_ml.ml_line_count == curbuf->b_ml.ml_line_count)
  	{
  	    differ = FALSE;
  	    for (lnum = 1; lnum <= curbuf->b_ml.ml_line_count; ++lnum)
  		if (STRCMP(ml_get_buf(buf, lnum, FALSE), ml_get(lnum)) != 0)
  		{
  		    differ = TRUE;
  		    break;
  		}
  	}
      }
      vim_free(ea.cmd);
  
      /* restore curwin/curbuf and a few other things */
      aucmd_restbuf(&aco);
  
      if (curbuf != newbuf)	/* safety check */
  	wipe_buffer(newbuf, FALSE);
  
      return differ;
  }
  
  /*
   * Wipe out a buffer and decrement the last buffer number if it was used for
   * this buffer.  Call this to wipe out a temp buffer that does not contain any
   * marks.
   */
      void
  wipe_buffer(buf, aucmd)
      buf_T	*buf;
      int		aucmd UNUSED;	    /* When TRUE trigger autocommands. */
  {
      if (buf->b_fnum == top_file_num - 1)
  	--top_file_num;
  
  #ifdef FEAT_AUTOCMD
      if (!aucmd)		    /* Don't trigger BufDelete autocommands here. */
  	block_autocmds();
  #endif
      close_buffer(NULL, buf, DOBUF_WIPE, FALSE);
  #ifdef FEAT_AUTOCMD
      if (!aucmd)
  	unblock_autocmds();
  #endif
  }
  