GloFNumRecordAttribute.h

gehe zur Dokumentation dieser Datei

#ifndef INC_GLOFNUMRECORDATTRIBUTE_H
#define INC_GLOFNUMRECORDATTRIBUTE_H
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
#include <sstream>
#include <iomanip>
#include <cmath>
#include "GloTypes.h"
#include "GloBaseRecordAttribute.h"
#include "EuStdFunctions.h"
//-----------------------------------------------------------------------------
namespace glo
{
  //---------------------------------------------------------------------------
  class __glo_export_dll FNumRecordAttribute : public BaseRecordAttribute
  {
    protected:
      //============= Konstruktoren
      //-----------------------------------------------------------------------
      FNumRecordAttribute();
      //-----------------------------------------------------------------------
      virtual ~FNumRecordAttribute();
      //-----------------------------------------------------------------------
 
    public:
      //============= Konstruktoren
      //-----------------------------------------------------------------------
      FNumRecordAttribute(  ClassInfoAttribute * pType,
                            const std::streampos & rFilePos );
      //-----------------------------------------------------------------------
 
    protected:
      //============== Konstruktoren
      //-----------------------------------------------------------------------
      FNumRecordAttribute( const FNumRecordAttribute & rT );
      //-----------------------------------------------------------------------
 
 
    public:
      //============== Methods
      //-----------------------------------------------------------------------
      template<typename T> std::string getTValueAsString( const T & rTValue, bool bFillBlanks ) const;
      //-----------------------------------------------------------------------
 
      //============== Operatoren
      //-----------------------------------------------------------------------
 
      bool operator== ( const FNumRecordAttribute & rT ) const;
      bool operator!= ( const FNumRecordAttribute & rT ) const;
      //-----------------------------------------------------------------------
 
    private:
      //============== Operatoren
      //-----------------------------------------------------------------------
      FNumRecordAttribute & operator= ( const FNumRecordAttribute & );
      //-----------------------------------------------------------------------
  };
  //---------------------------------------------------------------------------
  #ifdef _MSC_VER
    // Konvertierung von "xxx" in "yyy", möglicher Datenverlust
    #pragma warning( disable : 4244 )
  #endif
  //---------------------------------------------------------------------------
  template<typename T> std::string FNumRecordAttribute::getTValueAsString( const T & rTValue, bool bFillBlanks ) const
  {
    std::ostringstream    t_ossTemp;
    std::string           t_strRetVal;
    std::istringstream    t_isTransform;
    int                   t_iDigits(0);
    T                     t_tValue( rTValue );
  
    if ( this->getClassInfoAttribute() )
    {
      t_isTransform.clear();
      t_isTransform.str( this->getTypeInfo() );
      t_isTransform >> t_iDigits;
    }
    if ( t_iDigits > 0 )
    {
      t_tValue *= pow( (T) 10, t_iDigits);
      if ( t_tValue >= 0 )
          t_tValue = floor( t_tValue + 0.5 );
      else
          t_tValue = ceil( t_tValue - 0.5 );
      t_tValue /= pow( (T) 10, t_iDigits );
      t_ossTemp << std::setiosflags( std::ios::fixed )
                << std::setprecision( t_iDigits )
                << t_tValue;
    }
    else
    {
      t_ossTemp << std::scientific << t_tValue;
    }
    // Wenn Beschränkung und zu groß -> abschneiden
    if ( t_ossTemp.str().length() > this->getDataFieldLength() )
    {
      t_strRetVal.clear();
      t_strRetVal.append( t_ossTemp.str(),
                          std::size_t( 0 ),
                          std::size_t( this->getDataFieldLength() ) );
    }
    else
    {
      t_strRetVal = t_ossTemp.str();
      if ( t_strRetVal.length() < this->getDataFieldLength() && bFillBlanks )
      {
        eut::StdStringFunctions::fillString( t_strRetVal,
                                         ' ',
                                         this->getDataFieldLength(),
                                         eut::StdStringFunctions::eBEFORE );
      }
    }
    return t_strRetVal;
  }
  //---------------------------------------------------------------------------
  #ifdef _MSC_VER
    // Konvertierung von "xxx" in "yyy", möglicher Datenverlust
    #pragma warning( default : 4244 )
  #endif
  //---------------------------------------------------------------------------
} // namespace glo
#endif