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