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# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0.
import _awscrt
def crc32(input: bytes, previous_crc32: int = 0) -> int:
"""
Perform a CRC32 (Ethernet, gzip) computation.
If continuing to update a running CRC, pass its value into `previous_crc32`.
Returns an unsigned 32-bit integer.
"""
return _awscrt.checksums_crc32(input, previous_crc32)
def crc32c(input: bytes, previous_crc32c: int = 0) -> int:
"""
Perform a Castagnoli CRC32c (iSCSI) computation.
If continuing to update a running CRC, pass its value into `previous_crc32c`.
Returns an unsigned 32-bit integer.
"""
return _awscrt.checksums_crc32c(input, previous_crc32c)
def crc64nvme(input: bytes, previous_crc64nvme: int = 0) -> int:
"""
Perform a CRC64 NVME computation.
If continuing to update a running CRC, pass its value into `previous_crc64nvme`.
Returns an unsigned 64-bit integer.
"""
return _awscrt.checksums_crc64nvme(input, previous_crc64nvme)
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