Initial community commit

Src/external_dependencies/openmpt-trunk/include/unrar/rs.hpp

@@ -0,0 +1,32 @@
+#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