ec6957f356
- upgraded to the latest LZMA SDK git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@3637 212acab6-be3b-0410-9dea-997c60f758d6
34 lines
719 B
C++
34 lines
719 B
C++
// Common/CRC.h
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#ifndef __COMMON_CRC_H
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#define __COMMON_CRC_H
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#include "Types.h"
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class CCRC
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{
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UInt32 _value;
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public:
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static UInt32 Table[256];
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static void InitTable();
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CCRC(): _value(0xFFFFFFFF){};
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void Init() { _value = 0xFFFFFFFF; }
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void Update(Byte v);
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void Update(UInt32 v);
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void Update(const UInt64 &v);
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void Update(const void *data, UInt32 size);
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UInt32 GetDigest() const { return _value ^ 0xFFFFFFFF; }
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static UInt32 CalculateDigest(const void *data, UInt32 size)
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{
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CCRC crc;
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crc.Update(data, size);
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return crc.GetDigest();
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}
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static bool VerifyDigest(UInt32 digest, const void *data, UInt32 size)
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{
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return (CalculateDigest(data, size) == digest);
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}
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};
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#endif
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