UNE STRUCTURE QUI GÈRE LE UNIX TIMESTAMP

	/// <summary>
	/// <author>Simon Kari (Bismark Prods)</author>
	/// <date>17/09/2004</date>
	/// Structure de gestion du timestamp unix
	/// </summary>
	[Serializable()]
    public struct UnixTimestamp
	{
		private double _value;
		private double Value
		{
			get
			{
				return this._value;
			}
		}

		public UnixTimestamp(double initialValue)
		{
			if(initialValue < 0)throw new ArgumentException("Negative number not allowed","initialValue");
			this._value = initialValue;
		}

		public UnixTimestamp(DateTime initialValue)
		{
			if(initialValue.Year < 1970)throw new ArgumentException("Dates under 1970 not allowed","initialValue");
			DateTime start = new DateTime(1970,1,1);
			TimeSpan unix = initialValue.Subtract(start);
			this._value = Math.Ceiling(unix.TotalSeconds);
		}
		public static UnixTimestamp operator+(UnixTimestamp lhs, UnixTimestamp rhs)
		{
			return new UnixTimestamp(lhs + rhs);
		}
		public static UnixTimestamp operator-(UnixTimestamp lhs, UnixTimestamp rhs)
		{
			return new UnixTimestamp(lhs - rhs);
		}
		public static implicit operator UnixTimestamp(double Value)
		{
			return new UnixTimestamp(Value);
		}
		public static implicit operator UnixTimestamp(DateTime Value)
		{
			return new UnixTimestamp(Value);
		}
		public static implicit operator double (UnixTimestamp from)
		{
			return from.Value;
		}
		public static implicit operator int(UnixTimestamp from)
		{
			return System.Convert.ToInt32(from.Value);
		}
		public static implicit operator long(UnixTimestamp from)
		{
			return System.Convert.ToInt64(from.Value);
		}
			
		public override string ToString()
		{
			return this._value.ToString();
		}

		public DateTime ToDateTime()
		{
			DateTime dt = new DateTime(1970,1,1);
			dt.AddSeconds(this._value);
			return dt;
		}

		public static DateTime ToDateTime(double utimestamp)
		{
			DateTime dt = new DateTime(1970,1,1);
			dt.AddSeconds(utimestamp);
			return dt;
		}
		public static DateTime ToDateTime(UnixTimestamp ut)
		{
			return ToDateTime(ut);
		}
	}