101a81e61SBarry Smith 2c6db04a5SJed Brown #include <petscmat.h> 3afcb2eb5SJed Brown #include <petsc-private/petscimpl.h> 401a81e61SBarry Smith 501a81e61SBarry Smith /* 601a81e61SBarry Smith MatDumpSPAI - Dumps a PETSc matrix to a file in an ASCII format 701a81e61SBarry Smith suitable for the SPAI code of Stephen Barnard to solve. This routine 801a81e61SBarry Smith is simply here to allow testing of matrices directly with the SPAI 901a81e61SBarry Smith code, rather then through the PETSc interface. 1001a81e61SBarry Smith 1101a81e61SBarry Smith */ 127087cfbeSBarry Smith PetscErrorCode MatDumpSPAI(Mat A,FILE *file) 1301a81e61SBarry Smith { 1401a81e61SBarry Smith const PetscScalar *vals; 1501a81e61SBarry Smith PetscErrorCode ierr; 1601a81e61SBarry Smith int i,j,n,size,nz; 1701a81e61SBarry Smith const int *cols; 1801a81e61SBarry Smith MPI_Comm comm; 1901a81e61SBarry Smith 2001a81e61SBarry Smith PetscObjectGetComm((PetscObject)A,&comm); 2101a81e61SBarry Smith 2201a81e61SBarry Smith MPI_Comm_size(comm,&size); 23*ce94432eSBarry Smith if (size > 1) SETERRQ(PetscObjectComm((PetscObject)A),PETSC_ERR_SUP,"Only single processor dumps"); 2401a81e61SBarry Smith 2501a81e61SBarry Smith ierr = MatGetSize(A,&n,&n);CHKERRQ(ierr); 2601a81e61SBarry Smith 2701a81e61SBarry Smith /* print the matrix */ 2801a81e61SBarry Smith fprintf(file,"%d\n",n); 2901a81e61SBarry Smith for (i=0; i<n; i++) { 3001a81e61SBarry Smith ierr = MatGetRow(A,i,&nz,&cols,&vals);CHKERRQ(ierr); 312fa5cd67SKarl Rupp for (j=0; j<nz; j++) fprintf(file,"%d %d %16.14e\n",i+1,cols[j]+1,vals[j]); 3201a81e61SBarry Smith ierr = MatRestoreRow(A,i,&nz,&cols,&vals);CHKERRQ(ierr); 3301a81e61SBarry Smith } 3401a81e61SBarry Smith PetscFunctionReturn(0); 3501a81e61SBarry Smith } 3601a81e61SBarry Smith 377087cfbeSBarry Smith PetscErrorCode VecDumpSPAI(Vec b,FILE *file) 3801a81e61SBarry Smith { 3901a81e61SBarry Smith PetscErrorCode ierr; 4001a81e61SBarry Smith int n,i; 4101a81e61SBarry Smith PetscScalar *array; 4201a81e61SBarry Smith 4301a81e61SBarry Smith ierr = VecGetSize(b,&n);CHKERRQ(ierr); 4401a81e61SBarry Smith ierr = VecGetArray(b,&array);CHKERRQ(ierr); 4501a81e61SBarry Smith 4601a81e61SBarry Smith fprintf(file,"%d\n",n); 472fa5cd67SKarl Rupp for (i=0; i<n; i++) fprintf(file,"%d %16.14e\n",i+1,array[i]); 4801a81e61SBarry Smith PetscFunctionReturn(0); 4901a81e61SBarry Smith } 50