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// CksumReg.cpp
#include "StdAfx.h"
#include "../../C/CpuArch.h"
#include "../Common/MyCom.h"
#include "../7zip/Common/RegisterCodec.h"
#include "../7zip/Compress/BZip2Crc.h"
Z7_CLASS_IMP_COM_1(
CCksumHasher
, IHasher
)
CBZip2Crc _crc;
UInt64 _size;
public:
// Byte _mtDummy[1 << 7];
CCksumHasher()
{
_crc.Init(0);
_size = 0;
}
};
Z7_COM7F_IMF2(void, CCksumHasher::Init())
{
_crc.Init(0);
_size = 0;
}
Z7_COM7F_IMF2(void, CCksumHasher::Update(const void *data, UInt32 size))
{
_size += size;
CBZip2Crc crc = _crc;
for (UInt32 i = 0; i < size; i++)
crc.UpdateByte(((const Byte *)data)[i]);
_crc = crc;
}
Z7_COM7F_IMF2(void, CCksumHasher::Final(Byte *digest))
{
UInt64 size = _size;
CBZip2Crc crc = _crc;
while (size)
{
crc.UpdateByte((Byte)size);
size >>= 8;
}
const UInt32 val = crc.GetDigest();
SetUi32(digest, val)
}
REGISTER_HASHER(CCksumHasher, 0x203, "CKSUM", 4)
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