73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/*
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* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
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* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior written
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* 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 LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "los_crc32.h"
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#define COUNT1 val = crc32_tab[(val ^ (*src++)) & 0xff] ^ (val >> 8)
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#define COUNT2 COUNT1; COUNT1
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#define COUNT4 COUNT2; COUNT2
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#define COUNT8 COUNT4; COUNT4
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#define ACCRATIO 8
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UINT32 LOS_EtherCrc32Accumulate(UINT32 val, UINT8 *src, INT32 len)
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{
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if (src == 0) {
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return 0L;
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}
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val = val ^ 0xffffffffUL;
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while (len >= ACCRATIO) {
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COUNT8;
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len -= ACCRATIO;
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}
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while (len--) {
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COUNT1;
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}
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return val ^ 0xffffffffUL;
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}
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UINT32 LOS_Crc32Accumulate(UINT32 val, UINT8 *src, INT32 len)
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{
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while (len >= ACCRATIO) {
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COUNT8;
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len -= ACCRATIO;
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}
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while (len--) {
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COUNT1;
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}
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return val;
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}
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