/*-------------------------------------------------------------------------*
 * GNU Prolog                                                              *
 *                                                                         *
 * Part  : configuration                                                   *
 * File  : bool.h                                                          *
 * Descr.: boolean type definition - header file                           *
 * Author: Daniel Diaz                                                     *
 *                                                                         *
 * Copyright (C) 1999-2015 Daniel Diaz                                     *
 *                                                                         *
 * This file is part of GNU Prolog                                         *
 *                                                                         *
 * GNU Prolog is free software: you can redistribute it and/or             *
 * modify it under the terms of either:                                    *
 *                                                                         *
 *   - the GNU Lesser General Public License as published by the Free      *
 *     Software Foundation; either version 3 of the License, or (at your   *
 *     option) any later version.                                          *
 *                                                                         *
 * or                                                                      *
 *                                                                         *
 *   - the GNU General Public License as published by the Free             *
 *     Software Foundation; either version 2 of the License, or (at your   *
 *     option) any later version.                                          *
 *                                                                         *
 * or both in parallel, as here.                                           *
 *                                                                         *
 * GNU Prolog 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 copies of the GNU General Public License and   *
 * the GNU Lesser General Public License along with this program.  If      *
 * not, see http://www.gnu.org/licenses/.                                  *
 *-------------------------------------------------------------------------*/


#ifndef _BOOL_H
#define _BOOL_H

#ifdef FALSE

#    if FALSE != 0
#        error "FALSE already defined with a value != 0"
#    endif
#else

#define FALSE 0

#endif

#ifdef TRUE

#    if TRUE != 1
#        error "TRUE already defined with a value != 1"
#    endif
#else

#define TRUE 1

#endif

#ifndef Bool
typedef int Bool;
#endif

#endif /* !_BOOL_H */
