27 lines
506 B
C++
27 lines
506 B
C++
// BZip2Crc.cpp
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#include "StdAfx.h"
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#include "BZip2Crc.h"
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UInt32 CBZip2Crc::Table[256];
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static const UInt32 kBZip2CrcPoly = 0x04c11db7; /* AUTODIN II, Ethernet, & FDDI */
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void CBZip2Crc::InitTable()
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{
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for (UInt32 i = 0; i < 256; i++)
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{
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UInt32 r = (i << 24);
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for (int j = 8; j > 0; j--)
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r = (r & 0x80000000) ? ((r << 1) ^ kBZip2CrcPoly) : (r << 1);
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Table[i] = r;
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}
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}
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class CBZip2CrcTableInit
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{
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public:
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CBZip2CrcTableInit() { CBZip2Crc::InitTable(); }
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} g_BZip2CrcTableInit;
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