Simple compressor moved out of cshift into stencil

lib/stencil/SimpleCompressor.h

@@ -0,0 +1,29 @@
+#ifndef _STENCIL_SIMPLE_COMPRESSOR_H_
+#define _STENCIL_SIMPLE_COMPRESSOR_H_
+
+namespace Grid {
+
+template<class vobj>
+class SimpleCompressor {
+public:
+  void Point(int) {};
+  inline int  CommDatumSize(void) { return sizeof(vobj); }
+  inline bool DecompressionStep(void) { return false; }
+  inline void Compress(vobj *buf,int o,const vobj &in) { buf[o]=in; }
+  inline void Exchange(vobj *mp,vobj *vp0,vobj *vp1,Integer type,Integer o){
+    exchange(mp[2*o],mp[2*o+1],vp0[o],vp1[o],type);
+  }
+  inline void Decompress(vobj *out,vobj *in, int o){ assert(0); }
+  inline void CompressExchange(vobj *out0,vobj *out1,const vobj *in,
+			       int j,int k, int m,int type){
+    exchange(out0[j],out1[j],in[k],in[m],type);
+  }
+  // For cshift. Cshift should drop compressor coupling altogether 
+  // because I had to decouple the code from the Stencil anyway
+  inline vobj operator() (const vobj &arg) {
+    return arg;
+  }
+};
+
+}
+#endif