private long _Seek(long offset, SeekOrigin origin)
{
long toPos = 0;
var length = _blockProvider.GetLength(_path);
if (origin == SeekOrigin.Begin)
{
toPos = offset;
}
else if (origin == SeekOrigin.Current)
{
toPos = _pos + offset;
}
else if (origin == SeekOrigin.End)
{
toPos = length + offset;
}
/*
* if (toPos < 0 || toPos > length)
* {
* throw new IOException("Invalid file position");
* }
*/
if (toPos < 0)
{
throw new IOException("Invalid file position");
}
_pos = toPos;
return(_pos);
}
/// <summary>
/// Returns the total number of bytes available in the specified block store
/// </summary>
/// <param name="path">The path to the block store</param>
/// <returns>The number of bytes in the block store</returns>
public long GetLength(string path)
{
return(_blockProvider.GetLength(path));
}