1 2 #include <../src/mat/impls/aij/seq/aij.h> 3 #include <../src/mat/impls/sbaij/seq/cholmod/cholmodimpl.h> 4 5 #undef __FUNCT__ 6 #define __FUNCT__ "MatWrapCholmod_seqaij" 7 static PetscErrorCode MatWrapCholmod_seqaij(Mat A,PetscBool values,cholmod_sparse *C,PetscBool *aijalloc) 8 { 9 Mat_SeqAIJ *aij = (Mat_SeqAIJ*)A->data; 10 const PetscInt *ai = aij->i,*aj = aij->j,*adiag; 11 const MatScalar *aa = aij->a; 12 PetscInt m = A->rmap->n,i,j,k,nz,*ci,*cj; 13 PetscScalar *ca; 14 PetscErrorCode ierr; 15 16 PetscFunctionBegin; 17 ierr = MatMarkDiagonal_SeqAIJ(A);CHKERRQ(ierr); 18 adiag = aij->diag; 19 for (i=0,nz=0; i<m; i++) nz += ai[i+1] - adiag[i]; 20 ierr = PetscMalloc3(m+1,PetscInt,&ci,nz,PetscInt,&cj,values?nz:0,PetscScalar,&ca);CHKERRQ(ierr); 21 for (i=0,k=0; i<m; i++) { 22 ci[i] = k; 23 for (j=adiag[i]; j<ai[i+1]; j++,k++) { 24 cj[k] = aj[j]; 25 if (values) ca[k] = aa[j]; 26 } 27 } 28 ci[i] = k; 29 *aijalloc = PETSC_TRUE; 30 31 ierr = PetscMemzero(C,sizeof(*C));CHKERRQ(ierr); 32 C->nrow = (size_t)A->cmap->n; 33 C->ncol = (size_t)A->rmap->n; 34 C->nzmax = (size_t)nz; 35 C->p = ci; 36 C->i = cj; 37 C->x = values ? ca : 0; 38 C->stype = -1; 39 C->itype = CHOLMOD_INT_TYPE; 40 C->xtype = values ? CHOLMOD_SCALAR_TYPE : CHOLMOD_PATTERN; 41 C->dtype = CHOLMOD_DOUBLE; 42 C->sorted = 1; 43 C->packed = 1; 44 PetscFunctionReturn(0); 45 } 46 47 EXTERN_C_BEGIN 48 #undef __FUNCT__ 49 #define __FUNCT__ "MatFactorGetSolverPackage_seqaij_cholmod" 50 PetscErrorCode MatFactorGetSolverPackage_seqaij_cholmod(Mat A,const MatSolverPackage *type) 51 { 52 PetscFunctionBegin; 53 *type = MATSOLVERCHOLMOD; 54 PetscFunctionReturn(0); 55 } 56 EXTERN_C_END 57 58 EXTERN_C_BEGIN 59 #undef __FUNCT__ 60 #define __FUNCT__ "MatGetFactor_seqaij_cholmod" 61 /* Almost a copy of MatGetFactor_seqsbaij_cholmod, yuck */ 62 PetscErrorCode MatGetFactor_seqaij_cholmod(Mat A,MatFactorType ftype,Mat *F) 63 { 64 Mat B; 65 Mat_CHOLMOD *chol; 66 PetscErrorCode ierr; 67 PetscInt m=A->rmap->n,n=A->cmap->n; 68 69 PetscFunctionBegin; 70 if (ftype != MAT_FACTOR_CHOLESKY) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_SUP,"CHOLMOD cannot do %s factorization with AIJ, only %s", 71 MatFactorTypes[ftype],MatFactorTypes[MAT_FACTOR_CHOLESKY]); 72 /* Create the factorization matrix F */ 73 ierr = MatCreate(((PetscObject)A)->comm,&B);CHKERRQ(ierr); 74 ierr = MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,m,n);CHKERRQ(ierr); 75 ierr = MatSetType(B,((PetscObject)A)->type_name);CHKERRQ(ierr); 76 ierr = MatSeqAIJSetPreallocation(B,0,PETSC_NULL);CHKERRQ(ierr); 77 ierr = PetscNewLog(B,Mat_CHOLMOD,&chol);CHKERRQ(ierr); 78 chol->Wrap = MatWrapCholmod_seqaij; 79 chol->Destroy = MatDestroy_SeqAIJ; 80 B->spptr = chol; 81 82 B->ops->view = MatView_CHOLMOD; 83 B->ops->choleskyfactorsymbolic = MatCholeskyFactorSymbolic_CHOLMOD; 84 B->ops->destroy = MatDestroy_CHOLMOD; 85 ierr = PetscObjectComposeFunctionDynamic((PetscObject)B,"MatFactorGetSolverPackage_C","MatFactorGetSolverPackage_seqaij_cholmod",MatFactorGetSolverPackage_seqaij_cholmod);CHKERRQ(ierr); 86 B->factortype = MAT_FACTOR_CHOLESKY; 87 B->assembled = PETSC_TRUE; /* required by -ksp_view */ 88 B->preallocated = PETSC_TRUE; 89 90 ierr = CholmodStart(B);CHKERRQ(ierr); 91 *F = B; 92 PetscFunctionReturn(0); 93 } 94 EXTERN_C_END 95