/* $Id: logic.h,v 1.11 2011/01/25 16:30:48 ellson Exp $ $Revision: 1.11 $ */
/* vim:set shiftwidth=4 ts=8: */

/*************************************************************************
 * Copyright (c) 2011 AT&T Intellectual Property 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: See CVS logs. Details at http://www.graphviz.org/
 *************************************************************************/

#ifndef GV_LOGIC_H
#define GV_LOGIC_H

#ifdef __cplusplus
extern "C" {
#endif

#if defined HAVE_STDBOOL_H && ! defined __cplusplus
#include <stdbool.h>
#endif

#ifndef NOT
#define NOT(v) (!(v))
#endif

#if 0
/* HAVE_BOOL only tested the CC compiler, we know C++ must define bool */
#if ! defined HAVE_BOOL && ! defined __cplusplus
typedef unsigned char bool;
#define false 0
#define true NOT(false)
#endif
#endif

#ifndef FALSE
#define	FALSE (0)
#endif
#ifndef TRUE
#define TRUE (!FALSE)
#endif

#ifndef NOTUSED
#define NOTUSED(var) (void) var
#endif

#ifndef NULL
#define NULL (void *)0
#endif

#ifndef NIL
#define NIL(type) ((type)0)
#endif

#ifdef __cplusplus
}
#endif

#endif