33 lines
819 B
C++
33 lines
819 B
C++
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#ifndef _RAR_RS_
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#define _RAR_RS_
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#define MAXPAR 255 // Maximum parity data size.
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#define MAXPOL 512 // Maximum polynomial degree.
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class RSCoder
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{
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private:
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void gfInit();
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int gfMult(int a,int b);
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void pnInit();
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void pnMult(int *p1,int *p2,int *r);
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int gfExp[MAXPOL]; // Galois field exponents.
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int gfLog[MAXPAR+1]; // Galois field logarithms.
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int GXPol[MAXPOL*2]; // Generator polynomial g(x).
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int ErrorLocs[MAXPAR+1],ErrCount;
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int Dnm[MAXPAR+1];
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int ParSize; // Parity bytes size and so the number of recovery volumes.
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int ELPol[MAXPOL]; // Error locator polynomial.
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bool FirstBlockDone;
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public:
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void Init(int ParSize);
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void Encode(byte *Data,int DataSize,byte *DestData);
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bool Decode(byte *Data,int DataSize,int *EraLoc,int EraSize);
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};
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#endif
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