#include <petscdmda.h>

/*
   User-defined application context - contains data needed by the
   application-provided call-back routines, FormJacobianLocal() and
   FormFunctionLocal().
*/
typedef struct AppCtx AppCtx;
struct AppCtx {
  PetscReal  param; /* test problem parameter */
  PetscInt   m, n;  /* MMS3 parameters */
  PetscCount ncoo;  /* support for coo setvalues only */
  PetscErrorCode (*mms_solution)(AppCtx *, const DMDACoor2d *, PetscScalar *);
  PetscErrorCode (*mms_forcing)(AppCtx *, const DMDACoor2d *, PetscScalar *);
};

PETSC_EXTERN PetscErrorCode FormFunctionLocalVec(DMDALocalInfo *info, Vec x, Vec f, AppCtx *user);
PETSC_EXTERN PetscErrorCode FormObjectiveLocalVec(DMDALocalInfo *info, Vec x, PetscReal *obj, AppCtx *user);
PETSC_EXTERN PetscErrorCode FormJacobianLocalVec(DMDALocalInfo *info, Vec x, Mat jac, Mat jacpre, AppCtx *user);