Sacado_cmath.hpp

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// $Id$ 
// $Source$ 
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// 
//                           Sacado Package
//                 Copyright (2006) Sandia Corporation
// 
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
// 
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
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#ifndef SACADO_CMATH_HPP
#define SACADO_CMATH_HPP

#include <cmath>        // for most math functions
#include <algorithm>  // for std::min and std::max
#include "Sacado_ConfigDefs.h"

// Define some math functions that aren't usually in cmath
#ifndef HAS_C99_TR1_CMATH
namespace std {
  inline float acosh(float x) { 
    return std::log(x + std::sqrt(x*x - float(1.0))); }
  inline float asinh(float x) { 
    return std::log(x + std::sqrt(x*x + float(1.0))); }
  inline float atanh(float x) { 
    return float(0.5)*std::log((float(1.0)+x)/(float(1.0)-x)); }

  inline double acosh(double x) { 
    return std::log(x + std::sqrt(x*x - double(1.0))); }
  inline double asinh(double x) { 
    return std::log(x + std::sqrt(x*x + double(1.0))); }
  inline double atanh(double x) { 
    return double(0.5)*std::log((double(1.0)+x)/(double(1.0)-x)); }
}
#endif // HAS_C99_TR1_CMATH

#endif // SACADO_CMATH_HPP