def _get_int64(data, position, dummy0, dummy1, dummy2):
 end = (position + 8)
 return (Int64(_UNPACK_LONG(data[position:end])[0]), end)

def _get_int64 ( data , position , dummy0 , dummy1 , dummy2 ) : end = ( position + 8 ) return ( Int64 ( _UNPACK_LONG ( data [ position : end ] ) [ 0 ] ) , end )
decode a bson int64 to bson .