libclamav/7z/7zCrc.h
b3840d2f
 /* 7zCrc.h -- CRC32 calculation
 2009-11-21 : Igor Pavlov : Public domain */
 
 #ifndef __7Z_CRC_H
 #define __7Z_CRC_H
 
 #include "Types.h"
 
 EXTERN_C_BEGIN
 
 extern const UInt32 g_CrcTable[];
 
 #define CRC_INIT_VAL 0xFFFFFFFF
 #define CRC_GET_DIGEST(crc) ((crc) ^ CRC_INIT_VAL)
 #define CRC_UPDATE_BYTE(crc, b) (g_CrcTable[((crc) ^ (b)) & 0xFF] ^ ((crc) >> 8))
 
 UInt32 MY_FAST_CALL CrcUpdate(UInt32 crc, const void *data, size_t size);
 UInt32 MY_FAST_CALL CrcCalc(const void *data, size_t size);
 
 EXTERN_C_END
 
 #endif