Actual source code: mhyp.c

  1: /*
  2:     Creates hypre ijvector from PETSc vector
  3: */

 5:  #include src/mat/matimpl.h
  7: #include "HYPRE.h"
  8: #include "IJ_mv.h"

 11: PetscErrorCode MatHYPRE_IJMatrixCreate(Mat v,HYPRE_IJMatrix *ij)
 12: {
 14:   int rstart,rend,cstart,cend;
 15: 
 17:   MatGetOwnershipRange(v,&rstart,&rend);
 18:   PetscMapGetLocalRange(v->cmap,&cstart,&cend);
 19:   HYPRE_IJMatrixCreate(v->comm,rstart,rend-1,cstart,cend-1,ij);
 20:   HYPRE_IJMatrixSetObjectType(*ij,HYPRE_PARCSR);
 21:   return(0);
 22: }

 24: /*
 25:       Currently this only works with the MPIAIJ PETSc matrices to make
 26: the conversion efficient
 27: */
 28: /* #include "src/mat/impls/aij/mpi/mpiaij.h" */
 29: /*  Mat_MPIAIJ  *aij = (Mat_MPIAIJ *)v->data; */

 31: PetscErrorCode MatHYPRE_IJMatrixCopy(Mat v,HYPRE_IJMatrix ij)
 32: {
 33:   PetscErrorCode    ierr;
 34:   int               i,rstart,rend,ncols;
 35:   const PetscScalar *values;
 36:   const int         *cols;

 39:   HYPRE_IJMatrixInitialize(ij);
 40:   MatGetOwnershipRange(v,&rstart,&rend);
 41:   for (i=rstart; i<rend; i++) {
 42:     MatGetRow(v,i,&ncols,&cols,&values);
 43:     HYPRE_IJMatrixSetValues(ij,1,&ncols,&i,cols,values);
 44:     MatRestoreRow(v,i,&ncols,&cols,&values);
 45:   }
 46:   HYPRE_IJMatrixAssemble(ij);
 47:   return(0);
 48: }