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248 lines
7.7 KiB
C
248 lines
7.7 KiB
C
/*
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* Misc useful OS-independent routines.
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*
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* Copyright 2006, Broadcom Corporation
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* All Rights Reserved.
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*
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* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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* $Id: bcmutils.c,v 1.1.1.12 2006/02/27 03:43:16 honor Exp $
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*/
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#include <typedefs.h>
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#include <bcmdefs.h>
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#include <stdarg.h>
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#include <bcmutils.h>
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#include <osl.h>
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#include <sbutils.h>
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#include <bcmnvram.h>
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#include <bcmendian.h>
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#include <bcmdevs.h>
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unsigned char bcm_ctype[] = {
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_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C, /* 0-7 */
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_BCM_C, _BCM_C|_BCM_S, _BCM_C|_BCM_S, _BCM_C|_BCM_S, _BCM_C|_BCM_S, _BCM_C|_BCM_S, _BCM_C,
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_BCM_C, /* 8-15 */
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_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C, /* 16-23 */
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_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C, /* 24-31 */
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_BCM_S|_BCM_SP,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P, /* 32-39 */
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_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P, /* 40-47 */
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_BCM_D,_BCM_D,_BCM_D,_BCM_D,_BCM_D,_BCM_D,_BCM_D,_BCM_D, /* 48-55 */
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_BCM_D,_BCM_D,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P, /* 56-63 */
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_BCM_P, _BCM_U|_BCM_X, _BCM_U|_BCM_X, _BCM_U|_BCM_X, _BCM_U|_BCM_X, _BCM_U|_BCM_X,
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_BCM_U|_BCM_X, _BCM_U, /* 64-71 */
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_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U, /* 72-79 */
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_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U, /* 80-87 */
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_BCM_U,_BCM_U,_BCM_U,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P, /* 88-95 */
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_BCM_P, _BCM_L|_BCM_X, _BCM_L|_BCM_X, _BCM_L|_BCM_X, _BCM_L|_BCM_X, _BCM_L|_BCM_X,
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_BCM_L|_BCM_X, _BCM_L, /* 96-103 */
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_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L, /* 104-111 */
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_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L, /* 112-119 */
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_BCM_L,_BCM_L,_BCM_L,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_C, /* 120-127 */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 128-143 */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 144-159 */
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_BCM_S|_BCM_SP, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P,
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_BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, /* 160-175 */
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_BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P,
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_BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, /* 176-191 */
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_BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U,
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_BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, /* 192-207 */
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_BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_P, _BCM_U, _BCM_U, _BCM_U,
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_BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_L, /* 208-223 */
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_BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L,
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_BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, /* 224-239 */
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_BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_P, _BCM_L, _BCM_L, _BCM_L,
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_BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L /* 240-255 */
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};
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ulong
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bcm_strtoul(char *cp, char **endp, uint base)
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{
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ulong result, value;
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bool minus;
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minus = FALSE;
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while (bcm_isspace(*cp))
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cp++;
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if (cp[0] == '+')
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cp++;
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else if (cp[0] == '-') {
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minus = TRUE;
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cp++;
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}
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if (base == 0) {
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if (cp[0] == '0') {
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if ((cp[1] == 'x') || (cp[1] == 'X')) {
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base = 16;
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cp = &cp[2];
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} else {
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base = 8;
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cp = &cp[1];
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}
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} else
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base = 10;
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} else if (base == 16 && (cp[0] == '0') && ((cp[1] == 'x') || (cp[1] == 'X'))) {
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cp = &cp[2];
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}
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result = 0;
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while (bcm_isxdigit(*cp) &&
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(value = bcm_isdigit(*cp) ? *cp-'0' : bcm_toupper(*cp)-'A'+10) < base) {
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result = result*base + value;
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cp++;
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}
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if (minus)
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result = (ulong)(result * -1);
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if (endp)
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*endp = (char *)cp;
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return (result);
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}
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uchar
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bcm_toupper(uchar c)
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{
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if (bcm_islower(c))
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c -= 'a'-'A';
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return (c);
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}
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char*
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bcm_ether_ntoa(struct ether_addr *ea, char *buf)
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{
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sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
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ea->octet[0]&0xff, ea->octet[1]&0xff, ea->octet[2]&0xff,
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ea->octet[3]&0xff, ea->octet[4]&0xff, ea->octet[5]&0xff);
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return (buf);
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}
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/*
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* Search the name=value vars for a specific one and return its value.
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* Returns NULL if not found.
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*/
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char*
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getvar(char *vars, char *name)
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{
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char *s;
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int len;
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len = strlen(name);
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/* first look in vars[] */
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for (s = vars; s && *s;) {
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/* CSTYLED */
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if ((memcmp(s, name, len) == 0) && (s[len] == '='))
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return (&s[len+1]);
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while (*s++)
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;
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}
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/* then query nvram */
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return (nvram_get(name));
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}
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/*
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* Search the vars for a specific one and return its value as
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* an integer. Returns 0 if not found.
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*/
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int
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getintvar(char *vars, char *name)
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{
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char *val;
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if ((val = getvar(vars, name)) == NULL)
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return (0);
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return (bcm_strtoul(val, NULL, 0));
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}
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/*******************************************************************************
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* crc8
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*
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* Computes a crc8 over the input data using the polynomial:
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*
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* x^8 + x^7 +x^6 + x^4 + x^2 + 1
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*
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* The caller provides the initial value (either CRC8_INIT_VALUE
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* or the previous returned value) to allow for processing of
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* discontiguous blocks of data. When generating the CRC the
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* caller is responsible for complementing the final return value
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* and inserting it into the byte stream. When checking, a final
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* return value of CRC8_GOOD_VALUE indicates a valid CRC.
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*
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* Reference: Dallas Semiconductor Application Note 27
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* Williams, Ross N., "A Painless Guide to CRC Error Detection Algorithms",
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* ver 3, Aug 1993, ross@guest.adelaide.edu.au, Rocksoft Pty Ltd.,
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* ftp://ftp.rocksoft.com/clients/rocksoft/papers/crc_v3.txt
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*
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* ****************************************************************************
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*/
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static uint8 crc8_table[256] = {
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0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
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0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
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0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
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0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
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0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
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0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
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0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
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0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
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0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
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0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
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0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
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0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
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0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
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0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
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0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
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0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
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0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
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0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
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0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
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0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
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0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
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0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
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0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
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0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
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0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
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0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
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0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
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0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
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0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
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0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
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0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
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0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F
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};
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#define CRC_INNER_LOOP(n, c, x) \
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(c) = ((c) >> 8) ^ crc##n##_table[((c) ^ (x)) & 0xff]
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uint8
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hndcrc8(
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uint8 *pdata, /* pointer to array of data to process */
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uint nbytes, /* number of input data bytes to process */
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uint8 crc /* either CRC8_INIT_VALUE or previous return value */
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)
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{
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/* hard code the crc loop instead of using CRC_INNER_LOOP macro
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* to avoid the undefined and unnecessary (uint8 >> 8) operation.
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*/
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while (nbytes-- > 0)
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crc = crc8_table[(crc ^ *pdata++) & 0xff];
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return crc;
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}
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