_fsnative.py 文件源码

def _decode_surrogatepass(data, codec):
    """Like data.decode(codec, 'surrogatepass') but makes utf-16-le/be work
    on Python < 3.4 + Windows

    https://bugs.python.org/issue27971

    Raises UnicodeDecodeError, LookupError
    """

    try:
        return data.decode(codec, _surrogatepass)
    except UnicodeDecodeError:
        if not _codec_can_decode_with_surrogatepass(codec):
            if _normalize_codec(codec) == "utf-16-be":
                data = _swap_bytes(data)
                codec = "utf-16-le"
            if _normalize_codec(codec) == "utf-16-le":
                buffer_ = ctypes.create_string_buffer(data + b"\x00\x00")
                value = ctypes.wstring_at(buffer_, len(data) // 2)
                if value.encode("utf-16-le", _surrogatepass) != data:
                    raise
                return value
            else:
                raise
        else:
            raise