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27 lines
726 B
C
27 lines
726 B
C
/* 7zCrc.h -- CRC32 calculation
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2023-04-02 : Igor Pavlov : Public domain */
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#ifndef ZIP7_INC_7Z_CRC_H
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#define ZIP7_INC_7Z_CRC_H
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#include "7zTypes.h"
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EXTERN_C_BEGIN
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extern UInt32 g_CrcTable[];
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/* Call CrcGenerateTable one time before other CRC functions */
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void Z7_FASTCALL CrcGenerateTable(void);
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#define CRC_INIT_VAL 0xFFFFFFFF
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#define CRC_GET_DIGEST(crc) ((crc) ^ CRC_INIT_VAL)
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#define CRC_UPDATE_BYTE(crc, b) (g_CrcTable[((crc) ^ (b)) & 0xFF] ^ ((crc) >> 8))
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UInt32 Z7_FASTCALL CrcUpdate(UInt32 crc, const void *data, size_t size);
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UInt32 Z7_FASTCALL CrcCalc(const void *data, size_t size);
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typedef UInt32 (Z7_FASTCALL *CRC_FUNC)(UInt32 v, const void *data, size_t size, const UInt32 *table);
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EXTERN_C_END
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#endif
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