---

UnitSystem.H

#ifndef UnitSystem_H
#define UnitSystem_H

#include <map>

#include <citrus/Quantity.H>
class DimensionGroup ;

/*
struct eqdgptr
{
  bool operator()( const DimensionGroup* g1, const DimensionGroup* g2 ) const
  { return  g1 == g2 ; }
} ;

bool eqhf( const DimensionGroup* g1, const DimensionGroup* g2 )
{ return g1 == g2 ; }
*/

class UnitSystem
{
public:
  UnitSystem() ;
  ~UnitSystem() ;

  void name( const char* ) ;
  const char* name() const ;

  void abbr( const char* ) ;
  const char* abbr() const ;

  void description( const char* ) ;
  const char* description() const ;

  bool addSpec( const DimensionGroup* dg, const char* spec ) ;
  bool getSpec( Quantity& result, const DimensionGroup* dg ) ;
  bool convert( Quantity& result, const Quantity& source ) ;

  const UnitSystem* next() const ;

private:
  char*                                         m_name ;
  char*                                         m_abbr ;
  char*                                         m_desc ;
  map< const DimensionGroup*, Quantity >        m_specs ;
  UnitSystem*                                   m_next ;

  static UnitSystem*                            theUnitSystems ;
} ;

#endif // UnitSystem_H

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