/// <summary>
/// The constructor for the TMSNStoreReader.
/// </summary>
/// <param name="dbdir">path to the directory holding the database.</param>
/// <param name="mmapIndexFiles">instruct TMSNStore to attempt memory mapping index files otherwise read into memory.</param>
public TMSNStoreReader(string dbdir, bool mmapIndexFiles)
{
string name = Path.Combine(dbdir, "keys-data");
//UnbufferedStream.BufferSize = 32*1024;
//_keysFs = new FileStream(name, FileMode.Open, FileAccess.Read, FileShare.Read);
_keysFs = ZStreamIn.Open(name);
_keysReader = new VariableLengthBinaryReader(_keysFs);
// open the index as either a mmap or regular file
name = Path.Combine(dbdir, "keys-data-index");
_keyIndex = new KeyIndex(name, _keysFs.Length, mmapIndexFiles);
// hard code the group size.
_keyCache = new KeyCacheReader(dbdir, 32, mmapIndexFiles);
_recordSource = new TMSNStoreRecordSource(this, dbdir);
_ascendingFactor = (_recordSource.Sorting.IsSortedAscending ? 1 : -1);
}
public InternalRecordFileReader(string filepath)
{
_filename = filepath;
_fileStream = ZStreamIn.Open(_filename);
this.ReadProperties(_fileStream);
_fileReader = new VariableLengthBinaryReader(_fileStream);
_currentFilePosition = _fileStream.Position;
_fileLength = _fileStream.Length;
}