private static DateTime ExtractDateTime(IoffeVesselMetData meteoData)
{
string dateStr = meteoData.Date.ToString();
string timeStr = meteoData.curtime.ToString("D6");
int sec = Convert.ToInt32(timeStr.Substring(timeStr.Length - 2));
timeStr = timeStr.Substring(0, timeStr.Length - 2);
int min = Convert.ToInt32(timeStr.Substring(timeStr.Length - 2));
timeStr = timeStr.Substring(0, timeStr.Length - 2);
int hour = (timeStr.Length > 0) ? (Convert.ToInt32(timeStr)) : (0);
int year = 2000 + Convert.ToInt32(dateStr.Substring(dateStr.Length - 2, 2));
dateStr = dateStr.Substring(0, dateStr.Length - 2);
int month = Convert.ToInt32(dateStr.Substring(dateStr.Length - 2, 2));
dateStr = dateStr.Substring(0, dateStr.Length - 2);
int day = Convert.ToInt32(dateStr);
DateTime dt = new DateTime(year, month, day, hour, min, sec, DateTimeKind.Utc);
return(dt);
}
public static Tuple <DateTime, DateTime> GetMetFileDateTimeMargins(string InputFilename)
{
int bytesCountPerObj = Marshal.SizeOf(typeof(IoffeVesselMetData));
long fileLength = (new FileInfo(InputFilename)).Length;
if (fileLength < bytesCountPerObj)
{
return(null);
}
BinaryReader reader = new BinaryReader(File.Open(InputFilename, FileMode.Open, FileAccess.Read, FileShare.Read));
byte[] buf1st = reader.ReadBytes(bytesCountPerObj);
GCHandle handle1st = GCHandle.Alloc(buf1st, GCHandleType.Pinned);
IoffeVesselMetData record1st =
(IoffeVesselMetData)
Marshal.PtrToStructure(handle1st.AddrOfPinnedObject(), typeof(IoffeVesselMetData));
DateTime dt1 = ExtractDateTime(record1st);
reader.BaseStream.Seek(-bytesCountPerObj, SeekOrigin.End);
byte[] buf2nd = reader.ReadBytes(bytesCountPerObj);
GCHandle handle2nd = GCHandle.Alloc(buf2nd, GCHandleType.Pinned);
IoffeVesselMetData record2nd =
(IoffeVesselMetData)
Marshal.PtrToStructure(handle2nd.AddrOfPinnedObject(), typeof(IoffeVesselMetData));
DateTime dt2 = ExtractDateTime(record2nd);
reader.Close();
return(new Tuple <DateTime, DateTime>(dt1, dt2));
}
public static List <IoffeVesselMetDataConverted> ReadMetFile(string InputFilename) //, bool readOnlyThe1stRecord = false)
{
int bytesCountPerObj = Marshal.SizeOf(typeof(IoffeVesselMetData));
if ((new FileInfo(InputFilename)).Length < bytesCountPerObj)
{
return(null);
}
BinaryReader reader = new BinaryReader(File.Open(InputFilename, FileMode.Open, FileAccess.Read, FileShare.Read));
reader.Close();
byte[] fileData = File.ReadAllBytes(InputFilename);
reader = new BinaryReader(new MemoryStream(fileData));
List <IoffeVesselMetData> lFileMetData = new List <IoffeVesselMetData>();
int structCount = Convert.ToInt32(fileData.Count() / bytesCountPerObj);
if (structCount == 0)
{
return(null);
}
int readStructs = 0;
while (true)
{
byte[] readBuffer = new byte[bytesCountPerObj];
readBuffer = reader.ReadBytes(bytesCountPerObj);
GCHandle handle = GCHandle.Alloc(readBuffer, GCHandleType.Pinned);
IoffeVesselMetData curRecord =
(IoffeVesselMetData)
Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(IoffeVesselMetData));
readStructs++;
lFileMetData.Add(curRecord);
//if ((readStructs >= structCount) || (readOnlyThe1stRecord))
if (readStructs >= structCount)
{
break;
}
}
List <IoffeVesselMetDataConverted> lRetList = lFileMetData.ConvertAll(meteoData =>
{
IoffeVesselMetDataConverted retMeteoData = new IoffeVesselMetDataConverted();
retMeteoData.dateTime = ExtractDateTime(meteoData);
retMeteoData.tAir = meteoData.tAir;
retMeteoData.windSpeed = meteoData.windSpeed;
retMeteoData.windDirection = meteoData.windDirection;
retMeteoData.dewPoint = meteoData.dewPoint;
retMeteoData.pressure = meteoData.pressure;
retMeteoData.rHumidity = meteoData.rHumidity;
retMeteoData.chillTemp = meteoData.chillTemp;
retMeteoData.percipitation = meteoData.percipitation;
return(retMeteoData);
});
return(lRetList);
}
