#if !defined(PETSCBAG_H)
#define PETSCBAG_H

#include <petscsys.h>

/* SUBMANSEC = Sys */

/*S
     PetscBag - PETSc object that manages a collection of user data including parameters.
           A bag is essentially a C struct with serialization (you can save it and load it from files).

   Level: beginner

    Sample Usage:
$      typedef struct {
$         PetscInt     height;
$         PetscScalar  root;
$         PetscReal    byebye;
$      } MyParameters;
$
$      PetscBag     bag;
$      MyParameters *params;
$
$      PetscCall(PetscBagCreate(PETSC_COMM_WORLD,sizeof(MyParameters),&bag));
$      PetscCall(PetscBagGetData(bag,(void **)&params));
$      PetscCall(PetscBagSetName(bag,"MyParameters"));
$      PetscCall(PetscBagRegisterInt(bag,&params.height,22,"height","Height of the water tower"));
$

.seealso: `PetscBagSetName()`, `PetscBagGetName()`, `PetscBagView()`, `PetscBagLoad()`, `PetscBagGetData()`
          `PetscBagRegisterReal()`, `PetscBagRegisterInt()`, `PetscBagRegisterBool()`, `PetscBagRegisterScalar()`
          `PetscBagSetFromOptions()`, `PetscBagRegisterVec()`, `PetscBagCreate()`, `PetscBagDestroy()`, `PetscBagRegisterEnum()`
S*/
typedef struct _n_PetscBag*     PetscBag;
typedef struct _n_PetscBagItem* PetscBagItem;

PETSC_EXTERN PetscErrorCode PetscBagCreate(MPI_Comm,size_t,PetscBag*);
PETSC_EXTERN PetscErrorCode PetscBagDestroy(PetscBag*);
PETSC_EXTERN PetscErrorCode PetscBagGetData(PetscBag,void **);
PETSC_EXTERN PetscErrorCode PetscBagRegisterReal(PetscBag,void*,PetscReal, const char*, const char*);
PETSC_EXTERN PetscErrorCode PetscBagRegisterRealArray(PetscBag,void*,PetscInt, const char*, const char*);
PETSC_EXTERN PetscErrorCode PetscBagRegisterString(PetscBag,void*,PetscInt,const char*, const char*, const char*);
PETSC_EXTERN PetscErrorCode PetscBagRegisterScalar(PetscBag,void*,PetscScalar,const  char*,const  char*);
PETSC_EXTERN PetscErrorCode PetscBagRegisterInt(PetscBag,void*,PetscInt,const  char*,const  char*);
PETSC_EXTERN PetscErrorCode PetscBagRegisterInt64(PetscBag,void*,PetscInt64,const  char*,const  char*);
PETSC_EXTERN PetscErrorCode PetscBagRegisterIntArray(PetscBag,void*,PetscInt,const  char*,const  char*);
PETSC_EXTERN PetscErrorCode PetscBagRegisterEnum(PetscBag,void*,const char*const*,PetscEnum,const char*,const  char*);
PETSC_EXTERN PetscErrorCode PetscBagRegisterBool(PetscBag,void*,PetscBool ,const  char*,const  char*);
PETSC_EXTERN PetscErrorCode PetscBagRegisterBoolArray(PetscBag,void*,PetscInt,const  char*,const  char*);
PETSC_EXTERN PetscErrorCode PetscBagGetNames(PetscBag, const char *[]);

PETSC_EXTERN PetscErrorCode PetscBagSetFromOptions(PetscBag);
PETSC_EXTERN PetscErrorCode PetscBagGetName(PetscBag, char **);
PETSC_EXTERN PetscErrorCode PetscBagSetName(PetscBag, const char *, const char *);
PETSC_EXTERN PetscErrorCode PetscBagSetOptionsPrefix(PetscBag, const char *);

PETSC_EXTERN PetscErrorCode PetscBagView(PetscBag,PetscViewer);
PETSC_EXTERN PetscErrorCode PetscBagLoad(PetscViewer,PetscBag);
PETSC_EXTERN PetscErrorCode PetscBagViewFromOptions(PetscBag,PetscObject,const char[]);

PETSC_EXTERN PetscErrorCode PetscBagSetViewer(PetscBag,PetscErrorCode (*)(PetscBag,PetscViewer));
PETSC_EXTERN PetscErrorCode PetscBagSetLoader(PetscBag,PetscErrorCode (*)(PetscBag,PetscViewer));
PETSC_EXTERN PetscErrorCode PetscBagSetDestroy(PetscBag,PetscErrorCode (*)(PetscBag));

#define PETSC_BAG_FILE_CLASSID 1211219

#endif