o  iL @sddlZGdddeZdS)Nc@sFeZdZdZdZdddZddZdd Zd d Zd d Z ddZ dS)CommonChecksumaHashlib-alike helper for CRC32C operations. This class should not be used directly and requires an update implementation. Args: initial_value (Optional[bytes]): the initial chunk of data from which the CRC32C checksum is computed. Defaults to b''. cCs d|_|dkr||dSdS)Nrr)_crcupdate)self initial_valuerrw/var/www/snowflake_co_dev_github/snow_flake_back_end_deploy/env/lib/python3.10/site-packages/google_crc32c/_checksum.py__init__szCommonChecksum.__init__cCst)zUpdate the checksum with a new chunk of data. Args: chunk (Optional[bytes]): a chunk of data used to extend the CRC32C checksum. )NotImplemented)rdatarrr r"szCommonChecksum.updatecCstd|jS)zBig-endian order, per RFC 4960. See: https://cloud.google.com/storage/docs/json_api/v1/objects#crc32c Returns: bytes: An eight-byte digest string. z>L)structpackrrrrr digest+szCommonChecksum.digestcCsd|jdS)zLike :meth:`digest` except returns as a bytestring of double length. Returns bytes: A sixteen byte digest string, contaiing only hex digits. z{:08x}ascii)formatrencoderrrr hexdigest5szCommonChecksum.hexdigestcCs|}|j|_|S)zvCreate another checksum with the same CRC32C value. Returns: Checksum: the new instance. ) __class__r)rclonerrr copy=szCommonChecksum.copyccs( ||}|s dS|||Vq)a;Consume chunks from a stream, extending our CRC32 checksum. Args: stream (BinaryIO): the stream to consume. chunksize (int): the size of the read to perform Returns: Generator[bytes, None, None]: Iterable of the chunks read from the stream. TN)readr)rstream chunksizechunkrrr consumeGs  zCommonChecksum.consumeN)r) __name__ __module__ __qualname____doc__ __slots__r rrrrrrrrr rs    r)r objectrrrrr s