1 /* 7zCrc.h -- CRC32 calculation 2 2013-01-18 : Igor Pavlov : Public domain */ 3 4 #ifndef __7Z_CRC_H 5 #define __7Z_CRC_H 6 7 #include "7zTypes.h" 8 9 EXTERN_C_BEGIN 10 11 extern UInt32 g_CrcTable[]; 12 13 /* Call CrcGenerateTable one time before other CRC functions */ 14 void MY_FAST_CALL CrcGenerateTable(void); 15 16 #define CRC_INIT_VAL 0xFFFFFFFF 17 #define CRC_GET_DIGEST(crc) ((crc) ^ CRC_INIT_VAL) 18 #define CRC_UPDATE_BYTE(crc, b) (g_CrcTable[((crc) ^ (b)) & 0xFF] ^ ((crc) >> 8)) 19 20 UInt32 MY_FAST_CALL CrcUpdate(UInt32 crc, const void *data, size_t size); 21 UInt32 MY_FAST_CALL CrcCalc(const void *data, size_t size); 22 23 EXTERN_C_END 24 25 #endif 26
