/*
   Private data structure for ILU/ICC/LU/Cholesky preconditioners.
*/
#if !defined(__FACTOR_H)
#define __FACTOR_H

#include <petsc/private/pcimpl.h>

typedef struct {
  Mat              fact;              /* factored matrix */
  MatFactorInfo    info;
  MatOrderingType  ordering;          /* matrix reordering */
  char             *solvertype;
  MatFactorType    factortype;
  PetscReal        actualfill;
  PetscBool        inplace;            /* flag indicating in-place factorization */
  PetscBool        reuseordering;      /* reuses previous reordering computed */
  PetscBool        reusefill;          /* reuse fill from previous LU */
} PC_Factor;

PETSC_INTERN PetscErrorCode PCFactorInitialize(PC,MatFactorType);
PETSC_INTERN PetscErrorCode PCFactorGetMatrix_Factor(PC,Mat*);

PETSC_INTERN PetscErrorCode PCFactorSetZeroPivot_Factor(PC,PetscReal);
PETSC_INTERN PetscErrorCode PCFactorGetZeroPivot_Factor(PC,PetscReal*);
PETSC_INTERN PetscErrorCode PCFactorSetShiftType_Factor(PC,MatFactorShiftType);
PETSC_INTERN PetscErrorCode PCFactorGetShiftType_Factor(PC,MatFactorShiftType*);
PETSC_INTERN PetscErrorCode PCFactorSetShiftAmount_Factor(PC,PetscReal);
PETSC_INTERN PetscErrorCode PCFactorGetShiftAmount_Factor(PC,PetscReal*);
PETSC_INTERN PetscErrorCode PCFactorSetDropTolerance_Factor(PC,PetscReal,PetscReal,PetscInt);
PETSC_INTERN PetscErrorCode PCFactorSetFill_Factor(PC,PetscReal);
PETSC_INTERN PetscErrorCode PCFactorSetMatOrderingType_Factor(PC,MatOrderingType);
PETSC_INTERN PetscErrorCode PCFactorGetLevels_Factor(PC,PetscInt*);
PETSC_INTERN PetscErrorCode PCFactorSetLevels_Factor(PC,PetscInt);
PETSC_INTERN PetscErrorCode PCFactorSetAllowDiagonalFill_Factor(PC,PetscBool);
PETSC_INTERN PetscErrorCode PCFactorGetAllowDiagonalFill_Factor(PC,PetscBool*);
PETSC_INTERN PetscErrorCode PCFactorSetPivotInBlocks_Factor(PC,PetscBool);
PETSC_INTERN PetscErrorCode PCFactorSetMatSolverType_Factor(PC,MatSolverType);
PETSC_INTERN PetscErrorCode PCFactorSetUpMatSolverType_Factor(PC);
PETSC_INTERN PetscErrorCode PCFactorGetMatSolverType_Factor(PC,MatSolverType*);
PETSC_INTERN PetscErrorCode PCFactorSetColumnPivot_Factor(PC,PetscReal);
PETSC_INTERN PetscErrorCode PCSetFromOptions_Factor(PetscOptionItems *PetscOptionsObject,PC);
PETSC_INTERN PetscErrorCode PCView_Factor(PC,PetscViewer);
PETSC_INTERN PetscErrorCode PCFactorSetDefaultOrdering_Factor(PC);

#endif