PetscErrorCode PCSetFromOptions_Factor(PC pc)
{
PC_Factor *factor = (PC_Factor*)pc->data;
PetscErrorCode ierr;
PetscBool flg = PETSC_FALSE,set;
char tname[256], solvertype[64];
PetscFunctionList ordlist;
PetscEnum etmp;
PetscFunctionBegin;
if (!MatOrderingRegisterAllCalled) {ierr = MatOrderingRegisterAll();CHKERRQ(ierr);}
ierr = PetscOptionsBool("-pc_factor_in_place","Form factored matrix in the same memory as the matrix","PCFactorSetUseInPlace",flg,&flg,NULL);CHKERRQ(ierr);
if (flg) {
ierr = PCFactorSetUseInPlace(pc);CHKERRQ(ierr);
}
ierr = PetscOptionsReal("-pc_factor_fill","Expected non-zeros in factored matrix","PCFactorSetFill",((PC_Factor*)factor)->info.fill,&((PC_Factor*)factor)->info.fill,0);CHKERRQ(ierr);
ierr = PetscOptionsEnum("-pc_factor_shift_type","Type of shift to add to diagonal","PCFactorSetShiftType",
MatFactorShiftTypes,(PetscEnum)(int)((PC_Factor*)factor)->info.shifttype,&etmp,&flg);CHKERRQ(ierr);
if (flg) {
ierr = PCFactorSetShiftType(pc,(MatFactorShiftType)etmp);CHKERRQ(ierr);
}
ierr = PetscOptionsReal("-pc_factor_shift_amount","Shift added to diagonal","PCFactorSetShiftAmount",((PC_Factor*)factor)->info.shiftamount,&((PC_Factor*)factor)->info.shiftamount,0);CHKERRQ(ierr);
ierr = PetscOptionsReal("-pc_factor_zeropivot","Pivot is considered zero if less than","PCFactorSetZeroPivot",((PC_Factor*)factor)->info.zeropivot,&((PC_Factor*)factor)->info.zeropivot,0);CHKERRQ(ierr);
ierr = PetscOptionsReal("-pc_factor_column_pivot","Column pivot tolerance (used only for some factorization)","PCFactorSetColumnPivot",((PC_Factor*)factor)->info.dtcol,&((PC_Factor*)factor)->info.dtcol,&flg);CHKERRQ(ierr);
flg = ((PC_Factor*)factor)->info.pivotinblocks ? PETSC_TRUE : PETSC_FALSE;
ierr = PetscOptionsBool("-pc_factor_pivot_in_blocks","Pivot inside matrix dense blocks for BAIJ and SBAIJ","PCFactorSetPivotInBlocks",flg,&flg,&set);CHKERRQ(ierr);
if (set) {
ierr = PCFactorSetPivotInBlocks(pc,flg);CHKERRQ(ierr);
}
flg = PETSC_FALSE;
ierr = PetscOptionsBool("-pc_factor_reuse_fill","Use fill from previous factorization","PCFactorSetReuseFill",flg,&flg,NULL);CHKERRQ(ierr);
if (flg) {
ierr = PCFactorSetReuseFill(pc,PETSC_TRUE);CHKERRQ(ierr);
}
flg = PETSC_FALSE;
ierr = PetscOptionsBool("-pc_factor_reuse_ordering","Reuse ordering from previous factorization","PCFactorSetReuseOrdering",flg,&flg,NULL);CHKERRQ(ierr);
if (flg) {
ierr = PCFactorSetReuseOrdering(pc,PETSC_TRUE);CHKERRQ(ierr);
}
ierr = MatGetOrderingList(&ordlist);CHKERRQ(ierr);
ierr = PetscOptionsList("-pc_factor_mat_ordering_type","Reordering to reduce nonzeros in factored matrix","PCFactorSetMatOrderingType",ordlist,((PC_Factor*)factor)->ordering,tname,256,&flg);CHKERRQ(ierr);
if (flg) {
ierr = PCFactorSetMatOrderingType(pc,tname);CHKERRQ(ierr);
}
/* maybe should have MatGetSolverTypes(Mat,&list) like the ordering list */
ierr = PetscOptionsString("-pc_factor_mat_solver_package","Specific direct solver to use","MatGetFactor",((PC_Factor*)factor)->solvertype,solvertype,64,&flg);CHKERRQ(ierr);
if (flg) {
ierr = PCFactorSetMatSolverPackage(pc,solvertype);CHKERRQ(ierr);
}
PetscFunctionReturn(0);
}
void PETSC_STDCALL pcfactorsetreusefill_(PC pc,PetscTruth *flag, int *__ierr ){
*__ierr = PCFactorSetReuseFill(
(PC)PetscToPointer((pc) ),*flag);
}
