public virtual long readUnsignedInt()
{
if (pos + 3 < len)
{
// common, fast case
return (unchecked((int) 0xFFFFFFFFL) & (long) ((buf[pos++] << 24) | ((0xFF & buf[pos++]) << 16) | ((0xFF & buf[pos++]) << 8) | (0xFF & buf[pos++])));
}
// general case
return (unchecked((int) 0xFFFFFFFFL) & (long) ((read() << 24) | (read() << 16) | (read() << 8) | read()));
}
