public static void BuildFullIndex(string catalogLocation)
{
int idx = -1;
IEnumerator<string> filesEnu = PPMXLFileIterator.PPMXLFiles(catalogLocation);
string fileNameIndex = catalogLocation + "zones.idx";
if (File.Exists(fileNameIndex))
{
MessageBox.Show(string.Format("Index file {0} already exists.", fileNameIndex));
return;
}
using (FileStream fs = new FileStream(fileNameIndex, FileMode.Create, FileAccess.Write))
using (BinaryWriter bwrt = new BinaryWriter(fs))
{
while (filesEnu.MoveNext())
{
string fileName = filesEnu.Current;
Console.WriteLine(fileName);
idx++;
int[] raIdx = new int[360];
int raCurr = 0;
int recNo = -1;
using (FileStream fileStr = new FileStream(fileName, FileMode.Open, FileAccess.Read))
using (BinaryReader rdr = new BinaryReader(fileStr))
{
byte[] header = rdr.ReadBytes(174);
while (true)
{
recNo++;
byte[] data = rdr.ReadBytes(174);
if (data == null || data.Length == 0) break;
PPMXLEntry entry = new PPMXLEntry(Encoding.ASCII.GetString(data));
int raTrunc = (int)entry.RADeg;
while (raTrunc >= raCurr)
{
//Console.WriteLine("Index[" + raCurr.ToString() + "] = " + recNo.ToString());
if (raCurr < 360) raIdx[raCurr] = recNo;
raCurr++;
}
}
}
while (360 > raCurr)
{
//Console.WriteLine("Index[" + raCurr.ToString() + "] = " + (recNo - 1).ToString());
raIdx[raCurr] = recNo - 1;
raCurr++;
}
for (int j = 0; j < 360; j++)
{
bwrt.Write(raIdx[j]);
}
}
bwrt.Flush();
}
}
private void LoadStars(SearchZone zone, double limitMag, List<IStar> starsFromThisZone)
{
List<LoadPosition> searchIndexes = m_Index.GetLoadPositions(zone);
foreach (LoadPosition pos in searchIndexes)
{
string fileName;
fileName = Path.Combine(m_CatalogLocation, string.Format("{0}{1}{2}.dat", pos.Hemisphere, pos.ZoneId.ToString("00"), pos.SubZoneId));
long positionFrom = (pos.FromRecordId + 1 /* for the header row */) * PPMXLEntry.Size;
uint numRecords = pos.ToRecordId - pos.FromRecordId;
using (FileStream fileStr = new FileStream(fileName, FileMode.Open, FileAccess.Read))
using (BinaryReader rdr = new BinaryReader(fileStr))
{
rdr.BaseStream.Position = positionFrom;
for (int i = 0; i <= numRecords; i++)
{
byte[] data = rdr.ReadBytes(PPMXLEntry.Size);
PPMXLEntry entry = new PPMXLEntry(Encoding.ASCII.GetString(data));
if (entry.Mag > limitMag) continue;
if (entry.RAJ2000 < zone.RAFrom) continue;
if (entry.RAJ2000 > zone.RATo) continue;
if (entry.DEJ2000 < zone.DEFrom) continue;
if (entry.DEJ2000 > zone.DETo) continue;
starsFromThisZone.Add(entry);
}
}
}
}
