1*b0a32e0cSBarry Smith /*$Id: aijbaij.c,v 1.3 2000/10/24 20:25:52 bsmith Exp bsmith $*/ 261e22dc2SBarry Smith 361e22dc2SBarry Smith #include "src/mat/impls/baij/seq/baij.h" 461e22dc2SBarry Smith 5273d9f13SBarry Smith EXTERN_C_BEGIN 661e22dc2SBarry Smith #undef __FUNC__ 7*b0a32e0cSBarry Smith #define __FUNC__ "MatConvert_SeqBAI_SeqAIJ" 8b9b97703SBarry Smith int MatConvert_SeqBAIJ_SeqAIJ(Mat A,MatType newtype,Mat *B) 961e22dc2SBarry Smith { 1061e22dc2SBarry Smith Mat_SeqBAIJ *a = (Mat_SeqBAIJ*)A->data; 11b9b97703SBarry Smith int ierr,bs = a->bs,*ai = a->i,*aj = a->j,n = A->M/bs,i,j,k; 12b9b97703SBarry Smith int *rowlengths,*rows,*cols,maxlen = 0,ncols; 13b9b97703SBarry Smith Scalar *aa = a->a; 1461e22dc2SBarry Smith 1561e22dc2SBarry Smith PetscFunctionBegin; 16*b0a32e0cSBarry Smith ierr = PetscMalloc(n*bs*sizeof(int),&( rowlengths ));CHKERRQ(ierr); 1761e22dc2SBarry Smith for (i=0; i<n; i++) { 18b9b97703SBarry Smith maxlen = PetscMax(maxlen,(ai[i+1] - ai[i])); 1961e22dc2SBarry Smith for (j=0; j<bs; j++) { 20b9b97703SBarry Smith rowlengths[i*bs+j] = bs*(ai[i+1] - ai[i]); 2161e22dc2SBarry Smith } 2261e22dc2SBarry Smith } 23b9b97703SBarry Smith ierr = MatCreateSeqAIJ(PETSC_COMM_SELF,A->m,A->n,0,rowlengths,B);CHKERRQ(ierr); 24b9b97703SBarry Smith ierr = MatSetOption(*B,MAT_COLUMN_ORIENTED);CHKERRQ(ierr); 25b9b97703SBarry Smith ierr = MatSetOption(*B,MAT_ROWS_SORTED);CHKERRQ(ierr); 26b9b97703SBarry Smith ierr = MatSetOption(*B,MAT_COLUMNS_SORTED);CHKERRQ(ierr); 2761e22dc2SBarry Smith ierr = PetscFree(rowlengths);CHKERRQ(ierr); 2861e22dc2SBarry Smith 29*b0a32e0cSBarry Smith ierr = PetscMalloc(bs*sizeof(int),&( rows ));CHKERRQ(ierr); 30*b0a32e0cSBarry Smith ierr = PetscMalloc(bs*maxlen*sizeof(int),&( cols ));CHKERRQ(ierr); 31b9b97703SBarry Smith for (i=0; i<n; i++) { 32b9b97703SBarry Smith for (j=0; j<bs; j++) { 33b9b97703SBarry Smith rows[j] = i*bs+j; 34b9b97703SBarry Smith } 35b9b97703SBarry Smith ncols = ai[i+1] - ai[i]; 36b9b97703SBarry Smith for (k=0; k<ncols; k++) { 37b9b97703SBarry Smith for (j=0; j<bs; j++) { 38b9b97703SBarry Smith cols[k*bs+j] = bs*(*aj) + j; 39b9b97703SBarry Smith } 40b9b97703SBarry Smith aj++; 41b9b97703SBarry Smith } 42b9b97703SBarry Smith ierr = MatSetValues(*B,bs,rows,bs*ncols,cols,aa,INSERT_VALUES); 43b9b97703SBarry Smith aa += ncols*bs*bs; 44b9b97703SBarry Smith } 45b9b97703SBarry Smith ierr = PetscFree(cols);CHKERRQ(ierr); 46b9b97703SBarry Smith ierr = PetscFree(rows);CHKERRQ(ierr); 47b9b97703SBarry Smith ierr = MatAssemblyBegin(*B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 48b9b97703SBarry Smith ierr = MatAssemblyEnd(*B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 4961e22dc2SBarry Smith PetscFunctionReturn(0); 5061e22dc2SBarry Smith } 51273d9f13SBarry Smith EXTERN_C_END 5261e22dc2SBarry Smith 53