7zCrc.h 637 B

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