arith.h

Go to the documentation of this file.

 
/*************************************************************************
 * 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
 * https://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: Details at https://graphviz.org
 *************************************************************************/
 
/* geometric functions (e.g. on points and boxes) with application to, but
 * no specific dependence on graphs */
 
#pragma once
 
#include <limits.h>
#include <math.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#ifdef MIN
#undef MIN
#endif
#define MIN(a,b)        ((a)<(b)?(a):(b))
 
#ifdef MAX
#undef MAX
#endif
#define MAX(a,b)        ((a)>(b)?(a):(b))
 
#ifdef BETWEEN
#undef BETWEEN
#endif
#define BETWEEN(a,b,c)  (((a) <= (b)) && ((b) <= (c)))
 
#ifndef M_PI
#define M_PI            3.14159265358979323846
#endif
 
#ifndef SQRT2
#define SQRT2           1.41421356237309504880
#endif
 
#define ROUND(f)        ((f>=0)?(int)(f + .5):(int)(f - .5))
#define RADIANS(deg)    ((deg)/180.0 * M_PI)
#define DEGREES(rad)    ((rad)/M_PI * 180.0)
 
#define SQR(a) ((a) * (a))
 
#ifdef __cplusplus
}
#endif