#ifndef __DATE_H
#define __DATE_H

#ifndef __OBJECT_H
#include <object.h>
#endif

// @C
// Classe TDate : TObject
// @END

#define TODAY  -1

class TDate : TObject
{
// @DPRIV
	long    _val; // Valore data in formato packed

// @DES Operatori esterni < > <= >= == !=
// @FPUB
	friend bool operator <(const TDate& a, const TDate& b);
	friend bool operator >(const TDate& a, const TDate& b);
	friend bool operator <=(const TDate& a, const TDate& b);
	friend bool operator >=(const TDate& a, const TDate& b);
	friend bool operator ==(const TDate& a, const TDate& b);
	friend bool operator !=(const TDate& a, const TDate& b);

public:
// @FPUB
	char* string(int yeardgts = 4, char sep = '-') const ;
// @DES Ritorna la data in formato di stringa
// @FPUB
	int     day() const ; // Ritorna il giorno
	int     month() const ; // Ritorna il mese
	int     year() const ; // Ritorna l'anno
	void addmonth(int nmonth = 1); // Aggiunge dei mesi
	void addyear(int nyear = 1); // Aggiunge degli anni
	bool ok() const; // Vero se la data e' corretta
static  bool isdate(const char*); // Vero se la stringa passata e' una data corretta

// @DES Ridefiniti gli operatori: += -= ++ -- >> e <<
// @FPUB
        TDate& operator +=(const long nday)  { _val += nday; return *this; }
        TDate& operator -=(const long   nday)  { _val -= nday; return *this; }
        TDate& operator ++()  { _val++; return *this; }
        TDate& operator --()  { _val--; return *this; }

	void print_on(ostream& out) const ;
	void read_from(istream& in) ;

        operator long() const { return _val; }
        
	operator long*() { return &_val;}
        
        operator const char*() const ;
        TDate& operator =(const char* s);
        TDate& operator =(long val) { _val = val; return *this;}
        TDate& operator =(const TDate& d) { _val = d._val; return *this;}

	TDate(const TDate& d);
	TDate(long l);
	TDate(const char* s);
	TDate(int day = 0, int month = 0, int year = 0);
};

// @FPUB
	TDate& operator +(const TDate& a, long nday) ;
	TDate& operator +(const long nday, const TDate& b) ;
	TDate& operator -(const TDate& a, long nday) ;
	inline bool operator <(const TDate& a, const TDate& b) { return a._val < b._val;}
	inline bool operator >(const TDate& a, const TDate& b) { return a._val > b._val;}
	inline bool operator <=(const TDate& a, const TDate& b) { return a._val <= b._val;}
	inline bool operator >=(const TDate& a, const TDate& b) { return a._val >= b._val;}
	inline bool operator ==(const TDate& a, const TDate& b) { return a._val == b._val;}
	inline bool operator !=(const TDate& a, const TDate& b) { return a._val != b._val;}
	void swap(TDate& a, TDate& b) ;	// Scambia la data a con la data b
	const TDate& fnc_min(const TDate& a, const TDate& b) ; // Ritorna la data piu' piccola tra a e b
	const TDate& fnc_max(const TDate& a, const TDate& b) ; // Ritorna la data piu' grande tra a e b
// @END

	const char* itom(byte month);     // Ritorna il nome del mese (1-12)
	const char* itow(byte dayofweek); // Ritorna il nome del giorno (1-7)

// @DPUB
extern TDate    nodate, botime, eotime;
// @END

#endif // __DATE_H