//=======================================================================
#region -= static methods =-
/// <summary>
/// must be in the format 239.02,E
/// </summary>
/// <param name="inputString"></param>
/// <returns></returns>
public static MagneticVariation Parse(string inputString)
{
//---- declare vars
MagneticVariation magVar = new MagneticVariation();
string[] halves = inputString.Split(',');
if (halves.Length < 2)
{
throw new FormatException("Input string must be in the format of 33.02,E");
}
if (string.IsNullOrEmpty(halves[0]))
{
magVar.Degrees = 0.0M;
}
else
{
magVar.Degrees = decimal.Parse(halves[0]);
}
magVar.Direction = DirectionUtil.Parse(halves[1]);
//---- return
return(magVar);
}
/// <summary>
/// must be in the format 239.02,E
/// </summary>
/// <param name="inputString"></param>
/// <returns></returns>
public static bool TryParse(string inputString, out MagneticVariation magneticVariation)
{
try
{
magneticVariation = Parse(inputString);
return(true);
}
catch (Exception e)
{
magneticVariation = null;
return(false);
}
}
//=======================================================================
//=======================================================================
#region -= constructors =-
#endregion
//=======================================================================
//=======================================================================
#region -= public methods =-
#endregion
//=======================================================================
//=======================================================================
#region -= static methods =-
public static RmcData Parse(string inputString)
{
//---- declare vars
RmcData rmcData = new RmcData();
string dataString = inputString.Substring(0, inputString.IndexOf('*')); // strip off the checksum
string[] values = dataString.Split(',');
//---- if we don't have 12 (header + 11), it's no good
if (values.Length < 12)
{
return(rmcData);
}
//---- Status
if (values[2].ToUpper() == "A")
{
rmcData.Status = Status.Valid;
}
else
{
rmcData.Status = Status.Invalid;
}
//---- if the date and time both are six digits
if (values[1].Length >= 6 && values[9].Length == 6)
{
//---- make sure that they're actually numbers
int temp;
if (int.TryParse(values[1].Substring(0, 6), out temp) && int.TryParse(values[9], out temp))
{
//---- should add more validation here
int day = int.Parse(values[9].Substring(0, 2));
int month = int.Parse(values[9].Substring(2, 2));
// assume same century
int year = int.Parse(values[9].Substring(4, 2)) + (DateTime.Now.Year / 100) * 100;
// Fix for timestamps from previous century
// RMC format does not allow us to detect older than 100 years though
if (year > DateTime.Now.Year)
{
year -= 100;
}
int hour = int.Parse(values[1].Substring(0, 2));
int minute = int.Parse(values[1].Substring(2, 2));
int second = int.Parse(values[1].Substring(4, 2));
rmcData.UtcDateTime = new DateTime(year, month, day, hour, minute, second);
// Timestamp may have higher granularity than seconds, this fix handles that.
if (values[1].Length > 7)
{
int extraDigits = values[1].Length - 7;
int partSeconds = int.Parse(values[1].Substring(7));
rmcData.UtcDateTime.Add(TimeSpan.FromSeconds((double)partSeconds / System.Math.Pow(10, extraDigits)));
}
}
}
else if (values[1].Length >= 9)
{
//---- should add more validation here
int hour = int.Parse(values[1].Substring(0, 2));
int minute = int.Parse(values[1].Substring(2, 2));
int second = int.Parse(values[1].Substring(4, 2));
int millisecond = 0;
if (values[1].Length >= 9)
{
millisecond = Convert.ToInt32(double.Parse(values[1].Substring(6, 3)) * 1000);
}
rmcData.UtcDateTime = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, hour, minute, second, millisecond);
}
//---- lat/long position
rmcData.Position = Position.Parse(values[3] + "," + values[4] + ";" + values[5] + "," + values[6]);
//一节也是１.８５２公里／小时
//---- speed in km
rmcData.GroundSpeed = Decimal.Parse(values[7]) * 1.852m;
////---- speed in knots
//rmcData.GroundSpeed = Decimal.Parse(values[7]);
//---- true course
rmcData.Heading = values[8].Length == 0 ? 0 : Decimal.Parse(values[8]);
//---- magnetic declination
MagneticVariation mag = null;
MagneticVariation.TryParse(values[10] + "," + values[11], out mag);
rmcData.MagneticVariation = mag;
//---- return
return(rmcData);
//1 220516 Time Stamp
//2 A validity - A-ok, V-invalid
//3 5133.82 current Latitude
//4 N North/South
//5 00042.24 current Longitude
//6 W East/West
//7 173.8 Speed in knots
//8 231.8 True course
//9 130694 Date Stamp
//10 004.2 Variation
//11 W East/West
//12 *70 checksum
}
