//---------------------------------------------------------------------------
#pragma hdrstop
#include "CRC.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
//---------------------------------------------------------------------------
//#define UPDC16(cp,crc)      (Crc16Table[((crc^cp) & 0xff)] ^ (crc >> 8))
//#define UPDCCCITT(cp,crc)   (CrcCcittTable[((crc >> 8) & 0xff)] ^ (crc << 8) ^ cp)
//#define UPDC32(octet,crc)   (Crc32Table[((crc) ^ (octet)) & 0xff] ^ ((crc) >> 8))
//---------------------------------------------------------------------------
unsigned short Crc16(unsigned char *Data, unsigned long Len)
{
  register unsigned short crc16 = 0;

  while (Len--) {
    //crc16 = UPDC16(*Data,crc16);
    crc16 = (Crc16Table[((crc16^(*Data)) & 0xff)] ^ (crc16 >> 8));
    Data++;
  }

  return crc16;
}
//---------------------------------------------------------------------------
unsigned short CrcCcitt(unsigned char *Data, unsigned long Len)
{
  register unsigned short crcccitt = 0;

  while (Len--) {
    //crcccitt = UPDCCCITT(*Data,crcccitt);
    crcccitt = (CrcCcittTable[((crcccitt >> 8) & 0xff)] ^ (crcccitt << 8) ^ (*Data));
    Data++;
  }

  return crcccitt;
}
//---------------------------------------------------------------------------
unsigned long Crc32(unsigned char *Data, unsigned long Len)
{
  register unsigned long crc32 = 0xFFFFFFFFUL;

  while (Len--) {
    //crc32 = UPDC32(*Data,crc32);
    crc32 = (Crc32Table[((crc32) ^ (*Data)) & 0xff] ^ ((crc32) >> 8));
    Data++;
  }

  return ~crc32;
}
//---------------------------------------------------------------------------