crc.h

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#pragma once
//------------------------------------------------------------------------------
#include "core/types.h"
 
//------------------------------------------------------------------------------
namespace Util
{
class Crc
{
public:
    Crc();
    void Begin();
    template<typename sizetype> void Compute(unsigned char* buf, sizetype numBytes);
    void End();
    unsigned int GetResult() const;
 
private:
    static const unsigned int Key = 0x04c11db7;
    static const unsigned int NumByteValues = 256;
    static unsigned int Table[NumByteValues];
    static bool TableInitialized;
 
    bool inBegin;
    bool resultValid;
    unsigned int checksum;
};
 
//template<> void Crc::Compute(unsigned char* buf, int numBytes);
//template<> void Crc::Compute(unsigned char* buf, __int64 numBytes);
} // namespace Util
//------------------------------------------------------------------------------