Actual source code: mhyp.c
1: #define PETSCMAT_DLL
3: /*
4: Creates hypre ijvector from PETSc vector
5: */
7: #include src/mat/matimpl.h
9: #include "HYPRE.h"
10: #include "IJ_mv.h"
13: PetscErrorCode MatHYPRE_IJMatrixCreate(Mat v,HYPRE_IJMatrix *ij)
14: {
16: int rstart,rend,cstart,cend;
17:
19: MatGetOwnershipRange(v,&rstart,&rend);
20: PetscMapGetLocalRange(v->cmap,&cstart,&cend);
21: HYPRE_IJMatrixCreate(v->comm,rstart,rend-1,cstart,cend-1,ij);
22: HYPRE_IJMatrixSetObjectType(*ij,HYPRE_PARCSR);
23: return(0);
24: }
26: /*
27: Currently this only works with the MPIAIJ PETSc matrices to make
28: the conversion efficient
29: */
30: /* #include "src/mat/impls/aij/mpi/mpiaij.h" */
31: /* Mat_MPIAIJ *aij = (Mat_MPIAIJ *)v->data; */
33: PetscErrorCode MatHYPRE_IJMatrixCopy(Mat v,HYPRE_IJMatrix ij)
34: {
35: PetscErrorCode ierr;
36: int i,rstart,rend,ncols;
37: const PetscScalar *values;
38: const int *cols;
41: HYPRE_IJMatrixInitialize(ij);
42: MatGetOwnershipRange(v,&rstart,&rend);
43: for (i=rstart; i<rend; i++) {
44: MatGetRow(v,i,&ncols,&cols,&values);
45: HYPRE_IJMatrixSetValues(ij,1,&ncols,&i,cols,values);
46: MatRestoreRow(v,i,&ncols,&cols,&values);
47: }
48: HYPRE_IJMatrixAssemble(ij);
49: return(0);
50: }