www.pudn.com > CRCSET13 > VIRUSCRC.H

/* 
VIRUSCRC.H 
 
Kevin Dean 
Fairview Mall P.O. Box 55074 
1800 Sheppard Avenue East 
Willowdale, Ontario 
CANADA    M2J 5B9 
CompuServe ID: 76336,3114 
 
March 24, 1991 
 
	This is the interface to the anti-virus CRC check in VALIDCRC.C and 
VIRUSDAT.C. 
 
	This code is public domain. 
*/ 
 
 
typedef 
  unsigned long crc32_t; 
 
union filecrc 
  { 
  char searchstr[8];	/* String to search for. */ 
 
  struct 
    { 
    crc32_t polynomial;	/* Polynomial for this file. */ 
    crc32_t crc;	/* Calculated CRC for this file. */ 
    } x; 
  }; 
 
 
extern const union filecrc _viruscrc; 
 
 
/* CRC validation return codes. */ 
enum 
  { 
  CRC_VALID,	/* CRC is valid. */ 
  CRC_INVALID,	/* CRC is invalid. */ 
  CRC_ISZERO,	/* CRC polynomial has been reset to zero. */ 
  CRC_NOMEM,	/* No memory for data buffer. */ 
  CRC_FILEERR	/* Program file not found. */ 
  }; 
 
 
int validatecrc(const char *progname); 
 
 
/* isvalidcrc() is declared to maintain compatibility with earlier releases. */ 
#define isvalidcrc(progname)  (validatecrc(progname) == CRC_VALID)