/// <summary>
/// Sub offset
/// </summary>
public static UniversalTime operator -(UniversalTime date, TimeSpan offset)
{
var jd = SweDate.DateToJulianDay(date, DateCalendar.Gregorian);
jd -= offset.TotalDays;
return(SweDate.JulianDayToDate(jd, DateCalendar.Gregorian));
}
/// <summary>
/// New date from components
/// </summary>
public UniversalTime(int year, int month, int day, double hour)
: this()
{
var jd = SweDate.DateToJulianDay(year, month, day, hour, DateCalendar.Julian);
SweDate.JulianDayToDate(jd, DateCalendar.Julian, out _Year, out _Month, out _Day, out _Hours, out _Minutes, out _Seconds);
}
/// <summary>
/// Returns the DateUT of this Julian Day
/// </summary>
public UniversalTime ToDateUT()
{
return(SweDate.JulianDayToDate(Value, Calendar));
}
/// <summary>
/// Create a new Julian Day from a DateUT
/// </summary>
/// <param name="date">Date source</param>
/// <param name="calendar">Calendar source</param>
public JulianDay(UniversalTime date, DateCalendar?calendar = null)
: this()
{
this.Calendar = calendar ?? SweDate.GetCalendar(date.Year, date.Month, date.Day);
this.Value = SweDate.DateToJulianDay(date, this.Calendar);
}
/// <summary>
/// Create a new Julian Day from his value
/// </summary>
/// <param name="val">The Julian Day value</param>
public JulianDay(double val, DateCalendar?calendar = null)
: this()
{
this.Calendar = calendar ?? SweDate.GetCalendar(val);
this.Value = val;
}
/// <summary>
/// To string with format
/// </summary>
public string ToString(string format, IFormatProvider formatProvider)
{
if (String.IsNullOrWhiteSpace(format))
{
format = DefaultFormat;
}
System.Globalization.DateTimeFormatInfo dfi = (formatProvider ?? System.Globalization.CultureInfo.CurrentCulture)
.GetFormat(typeof(System.Globalization.DateTimeFormatInfo)) as System.Globalization.DateTimeFormatInfo;
dfi = dfi ?? System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat;
StringBuilder result = new StringBuilder();
int cnt = 0, fl = format.Length;
for (int i = 0; i < fl; i++)
{
char c = format[i];
switch (c)
{
case '\\':
i++;
if (i < format.Length)
{
result.Append(format[i]);
}
else
{
result.Append('\\');
}
break;
case 'd':
cnt = 0;
while (i < fl && format[i] == 'd')
{
cnt++; i++;
}
i--;
var jd = SweDate.DateToJulianDay(this);
int nd = ((int)SweDate.DayOfWeek(jd)) + 1;
if (nd >= 7)
{
nd -= 7;
}
if (cnt == 1)
{
result.Append(this.Day);
}
else if (cnt == 2)
{
result.Append(this.Day.ToString("D2"));
}
else if (cnt == 3)
{
result.Append(dfi.AbbreviatedDayNames[nd]);
}
else
{
result.Append(dfi.DayNames[nd]);
}
break;
case 'M':
cnt = 0;
while (i < fl && format[i] == 'M')
{
cnt++; i++;
}
i--;
if (cnt == 1)
{
result.Append(this.Month);
}
else if (cnt == 2)
{
result.Append(this.Month.ToString("D2"));
}
else if (cnt == 3)
{
result.Append(dfi.AbbreviatedMonthNames[this.Month - 1]);
}
else
{
result.Append(dfi.MonthNames[this.Month - 1]);
}
break;
case 'y':
cnt = 0;
while (i < fl && format[i] == 'y')
{
cnt++; i++;
}
i--;
if (cnt == 1)
{
result.Append(this.Year % 100);
}
else if (cnt == 2)
{
result.Append((this.Year % 100).ToString("D2"));
}
else
{
result.Append(this.Year);
}
break;
case 'h':
cnt = 0;
while (i < fl && format[i] == 'h')
{
cnt++; i++;
}
i--;
if (cnt == 1)
{
result.Append(this.Hours % 12);
}
else
{
result.Append((this.Hours % 12).ToString("D2"));
}
break;
case 'H':
cnt = 0;
while (i < fl && format[i] == 'H')
{
cnt++; i++;
}
i--;
if (cnt == 1)
{
result.Append(this.Hours);
}
else
{
result.Append(this.Hours.ToString("D2"));
}
break;
case 'm':
cnt = 0;
while (i < fl && format[i] == 'm')
{
cnt++; i++;
}
i--;
if (cnt == 1)
{
result.Append(this.Minutes);
}
else
{
result.Append(this.Minutes.ToString("D2"));
}
break;
case 's':
cnt = 0;
while (i < fl && format[i] == 's')
{
cnt++; i++;
}
i--;
if (cnt == 1)
{
result.Append(this.Seconds);
}
else
{
result.Append(this.Seconds.ToString("D2"));
}
break;
case 't':
cnt = 0;
while (i < fl && format[i] == 't')
{
cnt++; i++;
}
i--;
String des = this.Hours < 12 ? dfi.AMDesignator : dfi.PMDesignator;
if (cnt == 1)
{
result.Append(des[0]);
}
else
{
result.Append(des);
}
break;
//case '/':
// result.Append(DateTime.MinValue.ToString("/"));
// break;
default:
result.Append(c);
break;
}
}
return(result.ToString());
}
/// <summary>
/// Get Date UT from Ephemeris Time
/// </summary>
public UniversalTime DateUT(EphemerisTime et)
{
return(SweDate.JulianDayToDate(et.JulianDay.Value, et.JulianDay.Calendar));
}
/// <summary>
/// Get Date UT from Julian Day
/// </summary>
public UniversalTime DateUT(JulianDay jd)
{
return(SweDate.JulianDayToDate(jd.Value, jd.Calendar));
}