a6dbe3721e
per Intel policy to include file commit date using git cmd below. The policy does not apply to non-Intel (C) notices. git log --follow -C90% --format=%ad --date default <file> | tail -1 and then pull just the 4 digit year from the result. Intel copyrights were not added to files where Intel either had no contribution ot the contribution lacked substance (ie license header updates, formatting changes, etc). Contribution date used "--follow -C95%" to get the most accurate date. Note that several files in this patch didn't end the license/(c) block with a blank comment line so these were added as the vast majority of files do have this last blank line. Simply there for consistency. Signed-off-by: paul luse <paul.e.luse@intel.com> Change-Id: Id5b7ce4f658fe87132f14139ead58d6e285c04d4 Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15192 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Community-CI: Mellanox Build Bot
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
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* Copyright (C) 2020 Intel Corporation.
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* All rights reserved.
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*/
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#ifndef SPDK_UTIL_INTERNAL_H
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#define SPDK_UTIL_INTERNAL_H
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#include "spdk/stdinc.h"
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/**
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* IEEE CRC-32 polynomial (bit reflected)
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*/
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#define SPDK_CRC32_POLYNOMIAL_REFLECT 0xedb88320UL
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/**
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* CRC-32C (Castagnoli) polynomial (bit reflected)
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*/
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#define SPDK_CRC32C_POLYNOMIAL_REFLECT 0x82f63b78UL
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struct spdk_crc32_table {
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uint32_t table[256];
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};
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/**
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* Initialize a CRC32 lookup table for a given polynomial.
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*
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* \param table Table to fill with precalculated CRC-32 data.
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* \param polynomial_reflect Bit-reflected CRC-32 polynomial.
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*/
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void crc32_table_init(struct spdk_crc32_table *table,
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uint32_t polynomial_reflect);
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/**
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* Calculate a partial CRC-32 checksum.
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*
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* \param table CRC-32 table initialized with crc32_table_init().
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* \param buf Data buffer to checksum.
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* \param len Length of buf in bytes.
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* \param crc Previous CRC-32 value.
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* \return Updated CRC-32 value.
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*/
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uint32_t crc32_update(const struct spdk_crc32_table *table,
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const void *buf, size_t len,
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uint32_t crc);
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#endif /* SPDK_UTIL_INTERNAL_H */
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