// Copyright (C) 1999-2005 Open Source Telecom Corporation.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software 
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// 
// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however    
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.    
//
// This exception applies only to the code released under the name GNU
// Common C++.  If you copy code from other releases into a copy of GNU
// Common C++, as the General Public License permits, the exception does
// not apply to the code that you add in this way.  To avoid misleading
// anyone as to the status of such modified files, you must delete
// this exception notice from them.
//
// If you write modifications of your own for GNU Common C++, it is your choice
// whether to permit this exception to apply to your modifications.
// If you do not wish that, delete this exception notice.
//

/**
 * @file numbers.h
 * @short Numbers and dates manipulation.
 **/

#ifndef	CCXX_NUMBERS_H_
#define	CCXX_NUMBERS_H_

#ifndef	CCXX_THREAD_H_
#include <cc++/thread.h>
#endif

#ifndef CCXX_MISSING_H_
#include <cc++/missing.h>
#endif

#ifndef CCXX_STRCHAR_H_
#include <cc++/strchar.h>
#endif

#ifndef	CCXX_STRING_H_
#include <cc++/string.h>
#endif

#ifndef	CCXX_THREAD_H_
#include <cc++/thread.h>
#endif

#include <ctime>

#ifdef	CCXX_NAMESPACES
namespace ost {
#ifdef __BORLANDC__
	using std::tm;
	using std::time_t;
#endif
#endif

/**
 * A number manipulation class.  This is used to extract, convert,
 * and manage simple numbers that are represented in C ascii strings
 * in a very quick and optimal way.  
 *
 * @author David Sugar <dyfet@ostel.com>
 * @short number manipulation.
 */
class __EXPORT Number
{
protected:
	char *buffer;
	unsigned size;

public:
	/**
	 * Create an instance of a number.
 	 * @param buffer or NULL if created internally.
	 * @param size use - values for zero filled.
	 */
	Number(char *buffer, unsigned size);

	void setValue(long value);
	const char *getBuffer() const
		{return buffer;};

	long getValue() const;

	long operator()()
		{return getValue();};

	operator long()
		{return getValue();};

	operator char*()
		{return buffer;};

	long operator=(const long value);
	long operator+=(const long value);
	long operator-=(const long value);
	long operator--();
	long operator++();
	int operator==(const Number &num);
	int operator!=(const Number &num);
	int operator<(const Number &num);
	int operator<=(const Number &num);
	int operator>(const Number &num);
	int operator>=(const Number &num);

	friend long operator+(const Number &num, const long val);
	friend long operator+(const long val, const Number &num);
	friend long operator-(const Number &num, long val);
	friend long operator-(const long val, const Number &num);
};

class __EXPORT ZNumber : public Number
{
public:
	ZNumber(char *buf, unsigned size);
	void setValue(long value);
	long operator=(long value);
};

/**
 * The Date class uses a julian date representation of the current
 * year, month, and day.  This is then manipulated in several forms
 * and may be exported as needed.
 *
 * @author David Sugar <dyfet@ostel.com>
 * @short julian number based date class.
 */
class __EXPORT Date
{
protected:
	long julian;

protected:
	void toJulian(long year, long month, long day);
	void fromJulian(char *buf) const;

	/**
	 * A method to use to "post" any changed values when shadowing
	 * a mixed object class.  This is used by DateNumber.
	 */
	virtual void update(void);

public:

	Date(time_t tm);
	Date(tm *dt);
	Date(char *str, size_t size = 0);
	Date(int year, unsigned month, unsigned day);
	Date();

	int getYear(void) const;
	unsigned getMonth(void) const;
	unsigned getDay(void) const;
	unsigned getDayOfWeek(void) const;
	char *getDate(char *buffer) const;
	time_t getDate(void) const;
	time_t getDate(tm *buf) const;
	long getValue(void) const;
	void setDate(const char *str, size_t size = 0);
	bool isValid(void) const;

	friend Date operator+(const Date &date, const long val);
	friend Date operator-(const Date &date, const long val);
	friend Date operator+(const long val, const Date &date);
	friend Date operator-(const long val, const Date &date);

	operator long() const
		{return getValue();};

	String operator()() const;
	Date& operator++();
	Date& operator--();
	Date& operator+=(const long val);
	Date& operator-=(const long val);
	int operator==(const Date &date);
	int operator!=(const Date &date);
	int operator<(const Date &date);
	int operator<=(const Date &date);
	int operator>(const Date &date);
	int operator>=(const Date &date);
	bool operator!() const
		{return !isValid();};
};

/**
 * The Time class uses a integer representation of the current
 * time.  This is then manipulated in several forms
 * and may be exported as needed.
 *
 * @author Marcelo Dalmas <mad@brasmap.com.br>
 * @short Integer based time class.
 */

class __EXPORT Time
{
protected:
	long seconds;

protected:
	void toSeconds(int hour, int minute, int second);
	void fromSeconds(char *buf) const;
	virtual void update(void);

public:
	Time(time_t tm);
	Time(tm *dt);
	Time(char *str, size_t size = 0);
	Time(int hour, int minute, int second);	
	Time();

	long getValue(void) const;
	int getHour(void) const;
	int getMinute(void) const;
	int getSecond(void) const;
	char *getTime(char *buffer) const;
	time_t getTime(void) const;
	tm *getTime(tm *buf) const;
	void setTime(char *str, size_t size = 0);
	bool isValid(void) const;

	friend Time operator+(const Time &time1, const Time &time2);
	friend Time operator-(const Time &time1, const Time &time2);
	friend Time operator+(const Time &time, const int val);
	friend Time operator-(const Time &time, const int val);
	friend Time operator+(const int val, const Time &time);
	friend Time operator-(const int val, const Time &time);

	operator long()
		{return getValue();};

	String operator()() const;
	Time& operator++();
	Time& operator--();
	Time& operator+=(const int val);
	Time& operator-=(const int val);
	int operator==(const Time &time);
	int operator!=(const Time &time);
	int operator<(const Time &time);
	int operator<=(const Time &time);
	int operator>(const Time &time);
	int operator>=(const Time &time);
	bool operator!() const
		{return !isValid();};
};

/**
 * The Datetime class uses a julian date representation of the current
 * year, month, and day and a integer representation of the current
 * time.  This is then manipulated in several forms
 * and may be exported as needed.
 *
 * @author Marcelo Dalmas <mad@brasmap.com.br>
 * @short Integer based time class.
 */

class __EXPORT Datetime : public Date, public Time
{
  public:
  	Datetime(time_t tm);
	Datetime(tm *dt);
	Datetime(const char *str, size_t size = 0);
	Datetime(int year, unsigned month, unsigned day,
		 int hour, int minute, int second);
	Datetime();
	
	char *getDatetime(char *buffer) const;
	time_t getDatetime(void) const;
	bool isValid(void) const;

	Datetime& operator=(const Datetime datetime);
	Datetime& operator+=(const Datetime &datetime);
	Datetime& operator-=(const Datetime &datetime);
	Datetime& operator+=(const Time &time);
	Datetime& operator-=(const Time &time);

	int operator==(const Datetime&);
	int operator!=(const Datetime&);
	int operator<(const Datetime&);
	int operator<=(const Datetime&);
	int operator>(const Datetime&);
	int operator>=(const Datetime&);
	bool operator!() const;

	String strftime(const char *format) const;
};

/**
 * A number class that manipulates a string buffer that is also a date.
 *
 * @author David Sugar <dyfet@ostel.com>
 * @short a number that is also a date string.
 */
class __EXPORT DateNumber : public Number, public Date
{
protected:
	void update(void)
		{fromJulian(buffer);};

public:
	DateNumber(char *buffer);
};

#ifdef	CCXX_NAMESPACES
}
#endif

#endif

/** EMACS **
 * Local variables:
 * mode: c++
 * c-basic-offset: 8
 * End:
 */

