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lib/crc8.c
492 Bytes
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/* * Copyright (c) 2013 Google, Inc * * SPDX-License-Identifier: GPL-2.0+ */ #include "linux/crc8.h" |
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#define POLY (0x1070U << 3) static unsigned char _crc8(unsigned short data) |
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{ |
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int i; for (i = 0; i < 8; i++) { if (data & 0x8000) data = data ^ POLY; data = data << 1; |
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} |
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return (unsigned char)(data >> 8); } unsigned int crc8(unsigned int crc, const unsigned char *vptr, int len) { int i; for (i = 0; i < len; i++) crc = _crc8((crc ^ vptr[i]) << 8); return crc; |
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} |