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fei_MatrixTraits_FillableMat.hpp
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00042 
00043 
00044 #ifndef _fei_MatrixTraits_FillableMat_hpp_
00045 #define _fei_MatrixTraits_FillableMat_hpp_
00046 
00047 //This file defines matrix traits for fei::FillableMat matrices
00048 //
00049 
00050 #include <fei_CSRMat.hpp>
00051 #include <fei_CSVec.hpp>
00052 #include <fei_Vector_Impl.hpp>
00053 
00054 namespace fei {
00055 
00057   template<>
00058   struct MatrixTraits<FillableMat> {
00059 
00061     static const char* typeName()
00062       { return("FillableMat"); }
00063 
00066     static int setValues(FillableMat* mat, double scalar)
00067       {
00068         mat->setValues(scalar);
00069         return(0);
00070       }
00071 
00075     static int getNumLocalRows(FillableMat* mat, int& numRows)
00076     {
00077       numRows = mat->getNumRows();
00078       return(0);
00079     }
00080 
00083     static int getRowLength(FillableMat* mat, int row, int& length)
00084       {
00085         try {
00086           const FillableVec* matrixrow = mat->getRow(row);
00087           length = matrixrow->size();
00088         }
00089         catch(...) {
00090           length = 0;
00091         }
00092         return( 0 );
00093       }
00094 
00107     static int copyOutRow(FillableMat* mat,
00108                       int row, int len, double* coefs, int* indices)
00109       {
00110         try {
00111           const FillableVec* matrixrow = mat->getRow(row);
00112 
00113           FillableVec::const_iterator
00114             row_iter = matrixrow->begin(),
00115             row_end = matrixrow->end();
00116 
00117           int i=0;
00118           for(; row_iter != row_end; ++row_iter, ++i) {
00119             if (i >= len) break;
00120             coefs[i] = row_iter->second;
00121             indices[i] = row_iter->first;
00122           }
00123         }
00124         catch(...) {
00125           //what should we do here???
00126         }
00127 
00128         return( 0 );
00129       }
00130 
00133     static int putValuesIn(FillableMat* mat,
00134                            int numRows, const int* rows,
00135                            int numCols, const int* cols,
00136                            const double* const* values,
00137                            bool sum_into)
00138       {
00139         if (numCols < 1 || numRows < 1) return(0);
00140         if (sum_into) {
00141           for(int i=0; i<numRows; ++i) {
00142             mat->sumInRow(rows[i], cols, values[i], numCols);
00143           }
00144         }
00145         else {
00146           for(int i=0; i<numRows; ++i) {
00147             mat->putRow(rows[i], cols, values[i], numCols);
00148           }
00149         }
00150 
00151         return( 0 );
00152       }
00153 
00158     static int globalAssemble(FillableMat* mat)
00159     {
00160       return(0);
00161     }
00162 
00164     static int matvec(FillableMat* mat,
00165                       fei::Vector* x,
00166                       fei::Vector* y)
00167     {
00168       fei::Vector_Impl<FillableVec>* fvx =
00169         dynamic_cast<fei::Vector_Impl<FillableVec>* >(x);
00170       fei::Vector_Impl<FillableVec>* fvy =
00171         dynamic_cast<fei::Vector_Impl<FillableVec>* >(y);
00172 
00173       if (fvx == NULL || fvy == NULL) {
00174         return(-1);
00175       }
00176 
00177       fei::CSRMat A(*mat);
00178       fei::CSVec csx(*(fvx->getUnderlyingVector()));
00179       fei::CSVec csy(*(fvy->getUnderlyingVector()));
00180 
00181       fei::multiply_CSRMat_CSVec(A, csx, csy);
00182 
00183       return( 0 );
00184     }
00185 
00186   };//struct MatrixTraits
00187 }//namespace fei
00188 
00189 #endif // _fei_MatrixTraits_FillableMat_hpp_
00190 
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