crc32.h

一个在Visual c++下可对串口和MODEM进行操作,并能用ZOMDEM协议进行收发文件的程序.

/*********************************************************************/
/*                                                                   */
/*  crc32.h - calculate CRC-32s.                                     */
/*                                                                   */
/*                                                                   */
/*  The following things are defined:                                */
/*                                                                   */
/*  crc32 - a data type that contains the information required by    */
/*          these routines.                                          */
/*                                                                   */
/*  crc32Init - initialize the crc32 structure.  This routine        */
/*          should be called before using any of the other routines  */
/*                                                                   */
/*  crc32Update - expects a parameter of an integer, which contains  */
/*          a value from 0 to 255.  You should pass an unsigned      */
/*          value within this range.                                 */
/*                                                                   */
/*  crc32Value - returns an unsigned long containing the crc value   */
/*                                                                   */
/*  crc32Byte1 - returns the first byte of the crc                   */
/*                                                                   */
/*  crc32Byte2 - returns the second byte of the crc                  */
/*                                                                   */
/*  crc32Byte3 - returns the third byte of the crc                   */
/*                                                                   */
/*  crc32Byte4 - returns the fourth byte of the crc                  */
/*                                                                   */
/*                                                                   */
/*  Example:                                                         */
/*                                                                   */
/*  #include "crc32.h"                                               */
/*                                                                   */
/*  CRC32 crc;                                                       */
/*                                                                   */
/*  crc32Init(&crc);                                                 */
/*  crc32Update(&crc, 'C');                                          */
/*  crc32Update(&crc, 'R');                                          */
/*  crc32Update(&crc, 'C');                                          */
/*  printf("crc is %lx\n", crc32Value(&crc));                        */
/*  printf("high byte is %x\n", crc32Byte1(&crc));                   */
/*  printf("low byte is %x\n", crc32Byte4(&crc));                    */
/*                                                                   */
/*  Would print (assuming an ASCII machine):                         */
/*                                                                   */
/*  crc is 153a3a88                                                  */
/*  high byte is 15                                                  */
/*  low byte is 88                                                   */
/*                                                                   */
/*********************************************************************/

#ifndef CRC32_INCLUDED
#define CRC32_INCLUDED

static DWORD crc32_tab[256] = {

 0x00000000UL, 0x77073096UL, 0xEE0E612CUL, 0x990951BAUL,
 0x076DC419UL, 0x706AF48FUL, 0xE963A535UL, 0x9E6495A3UL,
 0x0EDB8832UL, 0x79DCB8A4UL, 0xE0D5E91EUL, 0x97D2D988UL,
 0x09B64C2BUL, 0x7EB17CBDUL, 0xE7B82D07UL, 0x90BF1D91UL,
 0x1DB71064UL, 0x6AB020F2UL, 0xF3B97148UL, 0x84BE41DEUL,
 0x1ADAD47DUL, 0x6DDDE4EBUL, 0xF4D4B551UL, 0x83D385C7UL,
 0x136C9856UL, 0x646BA8C0UL, 0xFD62F97AUL, 0x8A65C9ECUL,
 0x14015C4FUL, 0x63066CD9UL, 0xFA0F3D63UL, 0x8D080DF5UL,
 0x3B6E20C8UL, 0x4C69105EUL, 0xD56041E4UL, 0xA2677172UL,
 0x3C03E4D1UL, 0x4B04D447UL, 0xD20D85FDUL, 0xA50AB56BUL,
 0x35B5A8FAUL, 0x42B2986CUL, 0xDBBBC9D6UL, 0xACBCF940UL,
 0x32D86CE3UL, 0x45DF5C75UL, 0xDCD60DCFUL, 0xABD13D59UL,
 0x26D930ACUL, 0x51DE003AUL, 0xC8D75180UL, 0xBFD06116UL,
 0x21B4F4B5UL, 0x56B3C423UL, 0xCFBA9599UL, 0xB8BDA50FUL,
 0x2802B89EUL, 0x5F058808UL, 0xC60CD9B2UL, 0xB10BE924UL,
 0x2F6F7C87UL, 0x58684C11UL, 0xC1611DABUL, 0xB6662D3DUL,
 0x76DC4190UL, 0x01DB7106UL, 0x98D220BCUL, 0xEFD5102AUL,
 0x71B18589UL, 0x06B6B51FUL, 0x9FBFE4A5UL, 0xE8B8D433UL,
 0x7807C9A2UL, 0x0F00F934UL, 0x9609A88EUL, 0xE10E9818UL,
 0x7F6A0DBBUL, 0x086D3D2DUL, 0x91646C97UL, 0xE6635C01UL,
 0x6B6B51F4UL, 0x1C6C6162UL, 0x856530D8UL, 0xF262004EUL,
 0x6C0695EDUL, 0x1B01A57BUL, 0x8208F4C1UL, 0xF50FC457UL,
 0x65B0D9C6UL, 0x12B7E950UL, 0x8BBEB8EAUL, 0xFCB9887CUL,
 0x62DD1DDFUL, 0x15DA2D49UL, 0x8CD37CF3UL, 0xFBD44C65UL,
 0x4DB26158UL, 0x3AB551CEUL, 0xA3BC0074UL, 0xD4BB30E2UL,
 0x4ADFA541UL, 0x3DD895D7UL, 0xA4D1C46DUL, 0xD3D6F4FBUL,
 0x4369E96AUL, 0x346ED9FCUL, 0xAD678846UL, 0xDA60B8D0UL,
 0x44042D73UL, 0x33031DE5UL, 0xAA0A4C5FUL, 0xDD0D7CC9UL,
 0x5005713CUL, 0x270241AAUL, 0xBE0B1010UL, 0xC90C2086UL,
 0x5768B525UL, 0x206F85B3UL, 0xB966D409UL, 0xCE61E49FUL,
 0x5EDEF90EUL, 0x29D9C998UL, 0xB0D09822UL, 0xC7D7A8B4UL,
 0x59B33D17UL, 0x2EB40D81UL, 0xB7BD5C3BUL, 0xC0BA6CADUL,
 0xEDB88320UL, 0x9ABFB3B6UL, 0x03B6E20CUL, 0x74B1D29AUL,
 0xEAD54739UL, 0x9DD277AFUL, 0x04DB2615UL, 0x73DC1683UL,
 0xE3630B12UL, 0x94643B84UL, 0x0D6D6A3EUL, 0x7A6A5AA8UL,
 0xE40ECF0BUL, 0x9309FF9DUL, 0x0A00AE27UL, 0x7D079EB1UL,
 0xF00F9344UL, 0x8708A3D2UL, 0x1E01F268UL, 0x6906C2FEUL,
 0xF762575DUL, 0x806567CBUL, 0x196C3671UL, 0x6E6B06E7UL,
 0xFED41B76UL, 0x89D32BE0UL, 0x10DA7A5AUL, 0x67DD4ACCUL,
 0xF9B9DF6FUL, 0x8EBEEFF9UL, 0x17B7BE43UL, 0x60B08ED5UL,
 0xD6D6A3E8UL, 0xA1D1937EUL, 0x38D8C2C4UL, 0x4FDFF252UL,
 0xD1BB67F1UL, 0xA6BC5767UL, 0x3FB506DDUL, 0x48B2364BUL,
 0xD80D2BDAUL, 0xAF0A1B4CUL, 0x36034AF6UL, 0x41047A60UL,
 0xDF60EFC3UL, 0xA867DF55UL, 0x316E8EEFUL, 0x4669BE79UL,
 0xCB61B38CUL, 0xBC66831AUL, 0x256FD2A0UL, 0x5268E236UL,
 0xCC0C7795UL, 0xBB0B4703UL, 0x220216B9UL, 0x5505262FUL,
 0xC5BA3BBEUL, 0xB2BD0B28UL, 0x2BB45A92UL, 0x5CB36A04UL,
 0xC2D7FFA7UL, 0xB5D0CF31UL, 0x2CD99E8BUL, 0x5BDEAE1DUL,
 0x9B64C2B0UL, 0xEC63F226UL, 0x756AA39CUL, 0x026D930AUL,
 0x9C0906A9UL, 0xEB0E363FUL, 0x72076785UL, 0x05005713UL,
 0x95BF4A82UL, 0xE2B87A14UL, 0x7BB12BAEUL, 0x0CB61B38UL,
 0x92D28E9BUL, 0xE5D5BE0DUL, 0x7CDCEFB7UL, 0x0BDBDF21UL,
 0x86D3D2D4UL, 0xF1D4E242UL, 0x68DDB3F8UL, 0x1FDA836EUL,
 0x81BE16CDUL, 0xF6B9265BUL, 0x6FB077E1UL, 0x18B74777UL,
 0x88085AE6UL, 0xFF0F6A70UL, 0x66063BCAUL, 0x11010B5CUL,
 0x8F659EFFUL, 0xF862AE69UL, 0x616BFFD3UL, 0x166CCF45UL,
 0xA00AE278UL, 0xD70DD2EEUL, 0x4E048354UL, 0x3903B3C2UL,
 0xA7672661UL, 0xD06016F7UL, 0x4969474DUL, 0x3E6E77DBUL,
 0xAED16A4AUL, 0xD9D65ADCUL, 0x40DF0B66UL, 0x37D83BF0UL,
 0xA9BCAE53UL, 0xDEBB9EC5UL, 0x47B2CF7FUL, 0x30B5FFE9UL,
 0xBDBDF21CUL, 0xCABAC28AUL, 0x53B39330UL, 0x24B4A3A6UL,
 0xBAD03605UL, 0xCDD70693UL, 0x54DE5729UL, 0x23D967BFUL,
 0xB3667A2EUL, 0xC4614AB8UL, 0x5D681B02UL, 0x2A6F2B94UL,
 0xB40BBE37UL, 0xC30C8EA1UL, 0x5A05DF1BUL, 0x2D02EF8DUL };

#define crc32Init(crc) ((*(crc)) = 0xFFFFFFFFUL)

#define crc32Update(crc, ch) \
    ((*(crc)) = ((*(crc)) >> 8) ^ \
    crc32_tab[(unsigned char)(((ch) ^ (*(crc))) & 0xffUL)])

#define crc32Value(crc) (*(crc))

typedef DWORD CRC32;

#define crc32Byte1(crc) (((*(crc)) >> 24) & 0xffUL)

#define crc32Byte2(crc) (((*(crc)) >> 16) & 0xffUL)

#define crc32Byte3(crc) (((*(crc)) >> 8) & 0xffUL)

#define crc32Byte4(crc) ((*(crc)) & 0xffUL)

#endif