/* $Id: $ */

/* Copyright (C) 1997 Sverre Hvammen Johansen,
 * Department of Informatics, University of Oslo.
 *
 * This program 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; version 2.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "cim.h"

/******************************************************************************
                                          CHARACTER PROCEDURE LOWTEN(c)      */

char 
__rlowten (c)
     char c;
{
  char s;
  if (isdigit (c) || c == '+' || c == '-' 
      || c == '.' || c == ',' || c == 127 || c < 32
      || __risorank (c) > 127)
    __rerror ("Lowten: Illegal character");

  s = __currentlowten;
  __currentlowten = c;
  return (s);
}