arith.h

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/*************************************************************************
 * 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 v2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.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