diff options
Diffstat (limited to 'firmware/lib/crc8.c')
| -rw-r--r-- | firmware/lib/crc8.c | 38 |
1 files changed, 19 insertions, 19 deletions
diff --git a/firmware/lib/crc8.c b/firmware/lib/crc8.c index fa770253..b0ee8679 100644 --- a/firmware/lib/crc8.c +++ b/firmware/lib/crc8.c @@ -1,28 +1,28 @@ -/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved. +/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved. * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "crc8.h" -/* Return CRC-8 of the data, using x^8 + x^2 + x + 1 polynomial. A - * table-based algorithm would be faster, but for only a few bytes it isn't - * worth the code size. */ -uint8_t Crc8(const void* vptr, int len) { - const uint8_t *data = vptr; - unsigned crc = 0; - int i, j; +/** + * Return CRC-8 of the data, using x^8 + x^2 + x + 1 polynomial. A table-based + * algorithm would be faster, but for only a few bytes it isn't worth the code + * size. */ +uint8_t Crc8(const void *vptr, int len) +{ + const uint8_t *data = vptr; + unsigned crc = 0; + int i, j; - for (j = len; j; j--, data++) { - crc ^= (*data << 8); - for(i = 8; i; i--) { - if (crc & 0x8000) - crc ^= (0x1070 << 3); - crc <<= 1; - } - } + for (j = len; j; j--, data++) { + crc ^= (*data << 8); + for(i = 8; i; i--) { + if (crc & 0x8000) + crc ^= (0x1070 << 3); + crc <<= 1; + } + } - return (uint8_t)(crc >> 8); + return (uint8_t)(crc >> 8); } - - |