src/main/cpp/numerics4cpp/math.h

/*
 * Copyright (c) 2005-2007, DoodleProject
 * All rights reserved.
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 * may be used to endorse or promote products derived from this
 * software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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 */

#ifndef _NUMERICS4CPP_MATH_H_
#define _NUMERICS4CPP_MATH_H_

#include <cmath>
#include "numerics.h"

NUM_NAMESPACE_BEGIN

static const double LOG_2 = std::log(2.0);

static const double PI = std::acos(-1.0);

static const double PI_2 = PI + PI;
    
static const double LOG_2_PI = std::log(PI_2);

static const double LOG_PI = std::log(PI);
    
static const double HALF_LOG_2_PI = 0.5 * LOG_2_PI;

static const double SQRT_2 = std::sqrt(2.0);

bool is_positive_infinity(double x);

bool is_negative_infinity(double x);

bool is_nan(double x);

bool is_finite(double x);

bool is_infinite(double x);

NUM_NAMESPACE_END

#endif

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