public override int Read(byte[] buffer, int offset, int count)
{
if (_position == _length)
{
return(0);
}
if (_position > _length)
{
throw new IOException("Attempt to read beyond end of stream");
}
int chunk = CorrectChunkIndex((int)(_position / Sizes.OneMiB));
if (_currentChunkIndex != chunk || _currentChunkData == null)
{
if (_currentChunkData != null)
{
_currentChunkData.Dispose();
_currentChunkData = null;
}
if (!_archive.TryOpenFile(string.Format(CultureInfo.InvariantCulture, @"{0}/{1:D8}", _dir, chunk), out _currentChunkData))
{
_currentChunkData = new ZeroStream(Sizes.OneMiB);
}
_currentChunkIndex = chunk;
}
long chunkOffset = _position % Sizes.OneMiB;
int toRead = Math.Min((int)Math.Min(Sizes.OneMiB - chunkOffset, _length - _position), count);
_currentChunkData.Position = chunkOffset;
int numRead = _currentChunkData.Read(buffer, offset, toRead);
_position += numRead;
return(numRead);
}
