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1 /* 7zCrc.h -- CRC32 calculation | 1 /* 7zCrc.h -- CRC32 calculation |
2 2009-11-21 : Igor Pavlov : Public domain */ | 2 2013-01-18 : Igor Pavlov : Public domain */ |
3 | 3 |
4 #ifndef __7Z_CRC_H | 4 #ifndef __7Z_CRC_H |
5 #define __7Z_CRC_H | 5 #define __7Z_CRC_H |
6 | 6 |
7 #include "Types.h" | 7 #include "7zTypes.h" |
8 | 8 |
9 EXTERN_C_BEGIN | 9 EXTERN_C_BEGIN |
10 | 10 |
11 extern UInt32 g_CrcTable[]; | 11 extern UInt32 g_CrcTable[]; |
12 | 12 |
13 /* Call CrcGenerateTable one time before other CRC functions */ | 13 /* Call CrcGenerateTable one time before other CRC functions */ |
14 void MY_FAST_CALL CrcGenerateTable(void); | 14 void MY_FAST_CALL CrcGenerateTable(void); |
15 | 15 |
16 #define CRC_INIT_VAL 0xFFFFFFFF | 16 #define CRC_INIT_VAL 0xFFFFFFFF |
17 #define CRC_GET_DIGEST(crc) ((crc) ^ CRC_INIT_VAL) | 17 #define CRC_GET_DIGEST(crc) ((crc) ^ CRC_INIT_VAL) |
18 #define CRC_UPDATE_BYTE(crc, b) (g_CrcTable[((crc) ^ (b)) & 0xFF] ^ ((crc) >> 8)
) | 18 #define CRC_UPDATE_BYTE(crc, b) (g_CrcTable[((crc) ^ (b)) & 0xFF] ^ ((crc) >> 8)
) |
19 | 19 |
20 UInt32 MY_FAST_CALL CrcUpdate(UInt32 crc, const void *data, size_t size); | 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); | 21 UInt32 MY_FAST_CALL CrcCalc(const void *data, size_t size); |
22 | 22 |
23 EXTERN_C_END | 23 EXTERN_C_END |
24 | 24 |
25 #endif | 25 #endif |
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