constants.h

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//-------------------------------------------------------------
// a.m.b., dec 96
// last update dec 97
// $Id: constants.h,v 1.8.2.6 2006/03/06 15:27:00 garloff Exp $
//-------------------------------------------------------------


#ifndef TBCI_CONSTANTS_H
#define TBCI_CONSTANTS_H  

#ifndef ALIGN
# if defined(__GNUC__) && !defined(_DOXYGEN)
#  define ALIGN(x) __attribute__ ((aligned(x)))
# else
#  define ALIGN(x) 
# endif
#endif

#define HUGEVAL 1E38
#define MINVAL 1E-38

/*  This is a bit of a hack:
 *  We want that this header is also useable under plain C,
 *  so we can't include basics.h.
 *  If we are under C++ and basics.h has already been included,
 *  we do use the TBCI namespace though to avoid conflicts
 */
#if defined(__cplusplus) && defined(NAMESPACE_TBCI)
NAMESPACE_TBCI
#endif  

const long double Pi ALIGN(8) = 3.1415926535897932384626433832795028841968;
const double pi ALIGN(8) = Pi;
#ifndef PI
 const double PI ALIGN(8) = Pi;
#endif

const double pi2 = pi * 2.0;

const double c_0 ALIGN(8) = 299792458;                  // speed of light in vacuo [m/s]

const double e_0 ALIGN(8) = 1.602189e-19;                       // minus charge of electron [As]

const double m_e ALIGN(8) = 9.10953e-31;                        // rest mass of electron [kg]

const double epsilon_0 ALIGN(8) = 8.85418781762039e-12; // dielectricity of vacuum [As/Vm]

const double mu_0 ALIGN(8) = 4*pi*1.0e-7;               // permeability of vacuum [Vs/Am]

const double Z_0 ALIGN(8) = 376.73031346177;            // waveimpedance in vacuum [Ohm]

const double k_B ALIGN(8) = 1.38066e-23;                // Boltzmann constant [J/K]

const long double LN_2 ALIGN(8) = .6931471805599453094172321214581765680755;

const double E1 ALIGN(8) = 2.718281828459045235360287471352662498;

const double amu ALIGN(8) = 1.66055e-27;                // unified atomic mass unit [kg]
 
const double Ar_mass ALIGN(8) = 39.948*amu;             // Ar atomic mass [kg]

const double Planck = 6.626176e-34;                     // Planck constant [Js]

const double Planck_bar = Planck/(2*pi);

const double Avogadro = 6.02205e+23;                    // Avogadro/Loschmidt [1/mol]

const double Grav = 6.673e-11;                          // Gravitational constant [Nm2/kg2]

const long double SQRT2 ALIGN(8) = 1.41421356237309504880168872420969807857; 

#if defined(__cplusplus) && defined(NAMESPACE_TBCI)
NAMESPACE_END
#endif

#endif  /* TBCI_CONSTANTS_H */

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