#pragma once

#include <petscpf.h>
#include <petsc/private/petscimpl.h>
#include <petscviewer.h>

PETSC_EXTERN PetscBool      PFRegisterAllCalled;
PETSC_EXTERN PetscErrorCode PFRegisterAll(void);

typedef struct _PFOps *PFOps;
struct _PFOps {
  PetscErrorCode (*apply)(void *, PetscInt, const PetscScalar *, PetscScalar *);
  PetscErrorCode (*applyvec)(void *, Vec, Vec);
  PetscErrorCode (*destroy)(void *);
  PetscErrorCode (*view)(void *, PetscViewer);
  PetscErrorCode (*setfromoptions)(PF, PetscOptionItems);
};

struct _p_PF {
  PETSCHEADER(struct _PFOps);
  PetscInt dimin, dimout; /* dimension of input and output spaces */
  void    *data;
};