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WORD CRC( UCHAR byte, WORD crc)
{register UCHAR carry, s0_7, s8_15;
carry = (crc >> 8) ^ byte;
carry = carry ^ (carry >> 4);
s8_15 = crc ^ (carry << 4) ^ (carry >> 3);
s0_7 = carry ^ (carry << 5);
return (s8_15 << 8) ^ (s0_7 & 0xff) ;
}void CalcCRC(DWORD *pCRC, BYTE data, DWORD poly, DWORD CrcLength)
{
DWORD i, mask, crc;mask = 1 << (CrcLength-1);
crc = *pCRC ^ (data << (CrcLength-8));
for(i = 0; i <= 7; i++)
crc = crc & mask ? (crc << 1) ^ poly : crc << 1;*pCRC = crc & (0xFFFFFFFF >> (32-CrcLength));
}
char str[]="qwoprweit9034r9-23ir9234urt89uiojiojkl;ms vc [spc-0asdi9c-0ew8f094iwe";int main(int argc, char* argv[])
{
DWORD crc1, crc2, i;crc1 = 0; crc2 = 0;
for (i=1; i
crc1 = CRC(str[i],crc1);
CalcCRC(&crc2,str[i],0x1021,16);
}
printf("%08lx %08lx", crc1, crc2);return 0;
}