static int crcTable[] = {
0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
};
public static int UpdateCrc(char inputbyte, int crc) {
crc = crcTable[((crc)^(inputbyte))&0xFF]^((crc)/256);
return(crc);
}
....
int crc = 0;
c = 0x01;
int newcrc = UpdateCrc(c, crc);
for (int i = 0; i < djmsg.length; i++) {
c = (char) djmsg[i];
newcrc = UpdateCrc(c, newcrc);
outputStream.write((byte)c);
}
/* high byte */
int hb = (newcrc/256) & 0xff;
outputStream.write((byte)hb);
/* low byte */
int lb = newcrc & 0xff;
outputStream.write((byte)lb);
}
----- Original Message -----
From: "tino" <[EMAIL PROTECTED]>
To: "Java" <[email protected]>
Sent: Thursday, October 06, 2005 10:28 AM
Subject: Re: kontrolny kod
> malo by to byt CRC-CCITT
> potreboval by som algoritmus ako sa to pocita, mam textovy riadok a
> potrebujem z neho spocitat tento kontrolny kod, ako ?
> pripadne ak by bola nejaka kniznica ktora by to obsahovala
>
> ----- Original Message -----
> From: "Jiří Mareš" <[EMAIL PROTECTED]>
> To: "Java" <[email protected]>
> Sent: Thursday, October 06, 2005 10:20 AM
> Subject: Re: kontrolny kod
>
>
> >
> > Neni to CRC16?
> >
> > tino wrote:
> > > *neviete nahodou ako sa pocita 16-bitovy redundantny kod zalozeny na
> > > polynome x16+x12+x5+1 s radenim od najvyznemnejsieho po najmenej
> > > vyznamny bit ?*
> > >
> > > *pouziva sa pri generovani FUVI co je textovy subor z katastra je to
ako
> > > kontrolna polozka na konci riadku pocita sa z udajov riadku*
> > >
> > > *;721/2;2280;2280;2291;;2;281;;2;;1;;33063;*
> > >
> > >
> > >
> > >
> > >
> > > ----------
> > > * www.inMail.sk <http://www.inMail.sk> - Vasa emailova adresa na cely
> > > zivot ZDARMA
> > > * www.php5.sk - novy freehosting s php5 a MySQL, forum o php5
> > > * www.EuropskaDomena.sk <http://www.EuropskaDomena.sk> - bezplatna
> > > predregistracia domen .EU
> >
> > --
> > Jiří Mareš (mailto:[EMAIL PROTECTED])
> > ČSAD SVT Praha, s.r.o. (http://www.svt.cz)
> > Czech Republic
> >
> >
> > ----------
> > * www.inMail.sk - Vasa emailova adresa na cely zivot ZDARMA
> > * www.EuropskaDomena.sk - bezplatna predregistracia domen .EU
> > * www.inshop.sk - virtualna obchodna galeria s viac ako 230 obchodmi!
> >
> >
>
>
