1 #define PETSCMAT_DLL 2 3 #include "src/mat/impls/baij/seq/baij.h" 4 5 EXTERN_C_BEGIN 6 #undef __FUNCT__ 7 #define __FUNCT__ "MatConvert_SeqBAIJ_SeqAIJ" 8 PetscErrorCode PETSCMAT_DLLEXPORT MatConvert_SeqBAIJ_SeqAIJ(Mat A, MatType newtype,MatReuse reuse,Mat *newmat) 9 { 10 Mat B; 11 Mat_SeqBAIJ *a = (Mat_SeqBAIJ*)A->data; 12 PetscErrorCode ierr; 13 PetscInt bs = A->rmap.bs,*ai = a->i,*aj = a->j,n = A->rmap.N/bs,i,j,k; 14 PetscInt *rowlengths,*rows,*cols,maxlen = 0,ncols; 15 MatScalar *aa = a->a; 16 17 PetscFunctionBegin; 18 ierr = PetscMalloc(n*bs*sizeof(PetscInt),&rowlengths);CHKERRQ(ierr); 19 for (i=0; i<n; i++) { 20 maxlen = PetscMax(maxlen,(ai[i+1] - ai[i])); 21 for (j=0; j<bs; j++) { 22 rowlengths[i*bs+j] = bs*(ai[i+1] - ai[i]); 23 } 24 } 25 ierr = MatCreate(((PetscObject)A)->comm,&B);CHKERRQ(ierr); 26 ierr = MatSetSizes(B,A->rmap.n,A->cmap.n,A->rmap.N,A->cmap.N);CHKERRQ(ierr); 27 ierr = MatSetType(B,newtype);CHKERRQ(ierr); 28 ierr = MatSeqAIJSetPreallocation(B,0,rowlengths);CHKERRQ(ierr); 29 ierr = MatSetOption(B,MAT_ROW_ORIENTED,PETSC_FALSE);CHKERRQ(ierr); 30 ierr = PetscFree(rowlengths);CHKERRQ(ierr); 31 32 ierr = PetscMalloc(bs*sizeof(PetscInt),&rows);CHKERRQ(ierr); 33 ierr = PetscMalloc(bs*maxlen*sizeof(PetscInt),&cols);CHKERRQ(ierr); 34 for (i=0; i<n; i++) { 35 for (j=0; j<bs; j++) { 36 rows[j] = i*bs+j; 37 } 38 ncols = ai[i+1] - ai[i]; 39 for (k=0; k<ncols; k++) { 40 for (j=0; j<bs; j++) { 41 cols[k*bs+j] = bs*(*aj) + j; 42 } 43 aj++; 44 } 45 ierr = MatSetValues(B,bs,rows,bs*ncols,cols,aa,INSERT_VALUES);CHKERRQ(ierr); 46 aa += ncols*bs*bs; 47 } 48 ierr = PetscFree(cols);CHKERRQ(ierr); 49 ierr = PetscFree(rows);CHKERRQ(ierr); 50 ierr = MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 51 ierr = MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 52 53 B->rmap.bs = A->rmap.bs; 54 55 if (reuse == MAT_REUSE_MATRIX) { 56 ierr = MatHeaderReplace(A,B);CHKERRQ(ierr); 57 } else { 58 *newmat = B; 59 } 60 PetscFunctionReturn(0); 61 } 62 EXTERN_C_END 63 64 #include "src/mat/impls/aij/seq/aij.h" 65 66 EXTERN_C_BEGIN 67 #undef __FUNCT__ 68 #define __FUNCT__ "MatConvert_SeqAIJ_SeqBAIJ" 69 PetscErrorCode PETSCMAT_DLLEXPORT MatConvert_SeqAIJ_SeqBAIJ(Mat A,const MatType newtype,MatReuse reuse,Mat *newmat) 70 { 71 Mat B; 72 Mat_SeqAIJ *a = (Mat_SeqAIJ*)A->data; 73 Mat_SeqBAIJ *b; 74 PetscErrorCode ierr; 75 PetscInt *ai=a->i,m=A->rmap.N,n=A->cmap.N,i,*rowlengths; 76 77 PetscFunctionBegin; 78 if (n != m) SETERRQ(PETSC_ERR_ARG_WRONG,"Matrix must be square"); 79 80 ierr = PetscMalloc(m*sizeof(PetscInt),&rowlengths);CHKERRQ(ierr); 81 for (i=0; i<m; i++) { 82 rowlengths[i] = ai[i+1] - ai[i]; 83 } 84 ierr = MatCreate(((PetscObject)A)->comm,&B);CHKERRQ(ierr); 85 ierr = MatSetSizes(B,m,n,m,n);CHKERRQ(ierr); 86 ierr = MatSetType(B,newtype);CHKERRQ(ierr); 87 ierr = MatSeqBAIJSetPreallocation_SeqBAIJ(B,1,0,rowlengths);CHKERRQ(ierr); 88 ierr = PetscFree(rowlengths);CHKERRQ(ierr); 89 90 ierr = MatSetOption(B,MAT_ROW_ORIENTED,PETSC_TRUE);CHKERRQ(ierr); 91 92 b = (Mat_SeqBAIJ*)(B->data); 93 94 ierr = PetscMemcpy(b->i,a->i,(m+1)*sizeof(PetscInt));CHKERRQ(ierr); 95 ierr = PetscMemcpy(b->ilen,a->ilen,m*sizeof(PetscInt));CHKERRQ(ierr); 96 ierr = PetscMemcpy(b->j,a->j,a->nz*sizeof(PetscInt));CHKERRQ(ierr); 97 ierr = PetscMemcpy(b->a,a->a,a->nz*sizeof(MatScalar));CHKERRQ(ierr); 98 99 ierr = MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 100 ierr = MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 101 102 if (reuse == MAT_REUSE_MATRIX) { 103 ierr = MatHeaderReplace(A,B);CHKERRQ(ierr); 104 } else { 105 *newmat = B; 106 } 107 PetscFunctionReturn(0); 108 } 109 EXTERN_C_END 110