private TModel Seek(long location)
{
var offset = location - _position;
if (offset != 0)
{
_stream.Seek(offset, SeekOrigin.Current);
}
_position = location + _size;
_stream.Read(_buffer, 0, _size);
_model = ModelUtility.PtrToStructure <TModel>(ref _buffer);
return(_model);
}
public Reader(string path)
{
var file = new FileInfo(path);
_size = Marshal.SizeOf(typeof(TModel));
_buffer = new byte[_size];
_stream = file.Open(FileMode.Open, FileAccess.Read, FileShare.Read);
_count = (int)file.Length / _size;
_index = new Dictionary <int, long>(_count);
var ifile = ModelUtility.GetIndexFile(path);
var isize = Marshal.SizeOf(typeof(Element));
var ibuffer = new byte[isize];
using (var istream = ifile.Open(FileMode.Open, FileAccess.Read, FileShare.Read)) {
while (istream.Read(ibuffer, 0, isize) != 0)
{
var element = ModelUtility.PtrToStructure <Element>(ref ibuffer);
_index.Add(element.Id, element.Position);
}
}
}