b59b86ae67
Allowing for custom crc32 polynomials isn't really within the scope of SPDK. SPDK libraries have shifted over to using more optimized versions of these functions wherever possible (e.g. ISA-L). Signed-off-by: Seth Howell <seth.howell@intel.com> Change-Id: Ie4837010874e957481dd00896389b38c842445e0 Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/2424 Community-CI: Mellanox Build Bot Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
78 lines
2.7 KiB
C
78 lines
2.7 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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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