//----------------------------------------------------------------------------
//  EgalTech 2013-2013
//----------------------------------------------------------------------------
// File : Complex.cpp          Data : 08.01.14        Versione : 1.5a1
// Contenuto : Implementazione classe dei numeri complessi.
//
//
//
// Modifiche : 08.01.14 DS Creazione modulo.
//
//
//----------------------------------------------------------------------------

//--------------------------- Include ----------------------------------------
#include "stdafx.h"
#include "\EgtDev\Include\ENkComplex.h"


//---------------------------- Classe Complex ---------------------------------
Complex 
Complex::operator +=( double dVal)
{
   this->re += dVal ;
   return *this;
}

//----------------------------------------------------------------------------
Complex 
Complex::operator +=( Complex& cVal)
{
   this->re += cVal.re;
   this->im += cVal.im;

   return *this;
}

//----------------------------------------------------------------------------
Complex 
Complex::operator -=( double dVal)
{
   this->re -= dVal ;
   return *this ;
}

//----------------------------------------------------------------------------
Complex 
Complex::operator -=( Complex& cVal)
{
   this->re -= cVal.re ;
   this->im -= cVal.im ;

   return *this ;
}

//----------------------------------------------------------------------------
Complex 
Complex::operator *=( double dVal)
{
   this->re *= dVal ;
   this->im *= dVal ;

   return *this;
}

//----------------------------------------------------------------------------
Complex 
Complex::operator /=( double dVal)
{
   double dInv ;


   dInv = 1.0 / dVal ;
   this->re *= dInv ;
   this->im *= dInv ;

   return *this ;
}

//----------------------------------------------------------------------------
Complex 
Complex::operator >>=( int n)
{
   this->re = ldexp( this->re, -n) ;
   this->im = ldexp( this->im, -n) ;

   return *this ;
}

//----------------------------------------------------------------------------
Complex 
Complex::operator <<=( int n)
{
   this->re = ldexp( this->re, +n) ;
   this->im = ldexp( this->im, +n) ;

   return *this ;
}

//----------------------------------------------------------------------------
Complex 
Complex::operator *=( Complex& cVal)
{
   return ( *this = *this * cVal) ;
}

//----------------------------------------------------------------------------
Complex 
Complex::operator /=( Complex& cVal)
{
   return ( *this *= inv( cVal)) ;
}


//------------------------------ Functions -----------------------------------
// sqrt for Complex
Complex 
sqrt( Complex& cVal)
{
   Complex z ;                             // Power 0.5 simple enough
   double m ;                              // to do separate, faster       
                                           // than full exp(0.5*log(z))    
                                           // just like reals have their   
   m = mod( cVal) ;                        // sqrt. Ours gives the one     
   z.re = sqrt( (m + cVal.re) / 2) ;       // with -pi/2 < arg <= +pi/2    
   z.im = sqrt( (m - cVal.re) / 2) ;       // Our log interprets arg
   if ( cVal.im < 0.)                      // as in range -pi to pi,
        z.im = - z.im ;                    // like the atan2 used.  
   
   return z ;
}

//----------------------------------------------------------------------------
// log for Complex
Complex 
log( Complex& cVal)
{
   Complex z ;


   z.re = log( m2( cVal)) / 2 ;
   z.im = atan2( cVal.im, cVal.re) ;
  
   return z ;
}

//----------------------------------------------------------------------------
Complex 
exp( Complex& cVal)
{                   
   Complex ez ;
   double m ;


   m = exp( cVal.re) ;
   ez.re = m * cos( cVal.im) ;
   ez.im = m * sin( cVal.im) ;
  
   return ez ;
}

//----------------------------------------------------------------------------
Complex 
cosh( Complex& cVal)
{                    
   Complex ez ;


   ez = exp( cVal) ;

   return ( ( ez + inv(ez)) >> 1) ;
} 

//----------------------------------------------------------------------------
Complex 
sinh( Complex& cVal)
{                    
   Complex ez ;
 

   ez = exp( cVal) ;

   return ( ( ez - inv(ez)) >> 1) ;
}

//----------------------------------------------------------------------------
Complex 
tanh( Complex& cVal)
{                    
   Complex e2z ;


   e2z = exp( cVal << 1) ;
   return ( ( e2z - 1) / ( e2z + 1)) ;
}

//----------------------------------------------------------------------------
Complex 
cos( Complex& cVal)
{
   return cosh( itimes( cVal)) ;
}

//----------------------------------------------------------------------------
Complex 
isin( Complex& cVal)
{
   return sinh( itimes( cVal)) ;
}

//----------------------------------------------------------------------------
Complex 
sin( Complex& cVal)
{
   return -itimes( isin( cVal)) ;
};

//----------------------------------------------------------------------------
Complex 
itan( Complex& cVal)
{
   return tanh( itimes( cVal)) ;
}

//----------------------------------------------------------------------------
Complex 
tan( Complex& cVal)
{
   return -itimes( itan( cVal)) ;
}

//----------------------------------------------------------------------------
Complex 
acosh( Complex& cVal)
{
   return log( cVal + sqrt( cVal * cVal - 1)) ;
}

//----------------------------------------------------------------------------
Complex 
asinh( Complex& cVal)
{
   return log( cVal + sqrt( cVal * cVal + 1)) ;
}

//----------------------------------------------------------------------------
Complex 
atanh( Complex& cVal)
{
   return ( log(( 1 + cVal) / ( 1 - cVal)) >> 1) ;
}

//----------------------------------------------------------------------------
Complex 
acos( Complex& cVal)
{
   return -itimes( acosh( cVal)) ;
}

//----------------------------------------------------------------------------
Complex 
asin( Complex& cVal)
{
   return -itimes( asinh( itimes( cVal))) ;
}

//----------------------------------------------------------------------------
Complex 
atan( Complex& cVal)
{
   return -itimes( atanh( itimes( cVal))) ;
}