#pragma once

#include <petsc/private/petscimpl.h>

PETSC_EXTERN PetscBool      PetscRandomRegisterAllCalled;
PETSC_EXTERN PetscErrorCode PetscRandomRegisterAll(void);

typedef struct _PetscRandomOps *PetscRandomOps;
struct _PetscRandomOps {
  /* 0 */
  PetscErrorCode (*seed)(PetscRandom);
  PetscErrorCode (*getvalue)(PetscRandom, PetscScalar *);
  PetscErrorCode (*getvaluereal)(PetscRandom, PetscReal *);
  PetscErrorCode (*getvalues)(PetscRandom, PetscInt, PetscScalar *);
  PetscErrorCode (*getvaluesreal)(PetscRandom, PetscInt, PetscReal *);
  PetscErrorCode (*destroy)(PetscRandom);
  PetscErrorCode (*setfromoptions)(PetscRandom, PetscOptionItems);
};

struct _p_PetscRandom {
  PETSCHEADER(struct _PetscRandomOps);
  void         *data; /* implementation-specific data */
  unsigned long seed;
  PetscScalar   low, width; /* lower bound and width of the interval over
                                  which the random numbers are distributed */
  PetscBool     iset;       /* if true, indicates that the user has set the interval */
  /* array for shuffling ??? */
};