/* Definitions for interface to indent.c
   Copyright (C) 1985, 1986 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

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

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

/* 92.4.1   modified for Mule Ver.0.9.2 by  Y.Niibe <gniibe@mri.co.jp> */
/* 92.12.17 modified for Mule Ver.0.9.7 by Y.Niibe <gniibe@mri.co.jp>
        Preliminary support (92.8.2) for right-to-left languages. */
/* 93.5.22  modified for Mule Ver.0.9.7.1 by Y.Niibe <gniibe@mri.co.jp>
	for full support for composite character and
	private char-sets, and right-to-left char-sets. */

struct position
  {
    EMACS_INT bufpos;
    int hpos;
    int vpos;
    EMACS_INT prevhpos;
    int contin;
    int tab_offset;		/* 92.4.1 by Y.Niibe */
    int rev_hpos;		/* 92.8.2 by Y.Niibe */
    int vir_hpos;		/* 92.8.2 by Y.Niibe */
  };

struct position *compute_motion ();
struct position *vmotion ();

/* Value of point when current_column was called */
extern int last_known_column_point;

/* Functions for dealing with the column cache.  */

/* Return true iff the display table DISPTAB specifies the same widths
   for characters as WIDTHTAB.  We use this to decide when to
   invalidate the buffer's column_cache.  */
extern int disptab_matches_widthtab ( /* struct Lisp_Vector *disptab,
                                         struct Lisp_Vector *widthtab */ );

/* Recompute BUF's width table, using the display table DISPTAB.  */
extern void recompute_width_table ( /* struct buffer *buf,
                                       struct Lisp_Vector *disptab */ );

int *char_width_dir_on (); /* 93.5.22 Y.Niibe */