15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 7zCrc.h -- CRC32 calculation
25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)2009-11-21 : Igor Pavlov : Public domain */
35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef __7Z_CRC_H
55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define __7Z_CRC_H
65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "Types.h"
85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)EXTERN_C_BEGIN
105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern UInt32 g_CrcTable[];
125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* Call CrcGenerateTable one time before other CRC functions */
145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MY_FAST_CALL CrcGenerateTable(void);
155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CRC_INIT_VAL 0xFFFFFFFF
175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CRC_GET_DIGEST(crc) ((crc) ^ CRC_INIT_VAL)
185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CRC_UPDATE_BYTE(crc, b) (g_CrcTable[((crc) ^ (b)) & 0xFF] ^ ((crc) >> 8))
195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)UInt32 MY_FAST_CALL CrcUpdate(UInt32 crc, const void *data, size_t size);
215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)UInt32 MY_FAST_CALL CrcCalc(const void *data, size_t size);
225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)EXTERN_C_END
245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)
255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif
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