2: #ifndef _VIEWERIMPL
  3: #define _VIEWERIMPL

  5: #include <petsc-private/petscimpl.h>
  6: #include <petscviewer.h>

  8: struct _PetscViewerOps {
  9:    PetscErrorCode (*destroy)(PetscViewer);
 10:    PetscErrorCode (*view)(PetscViewer,PetscViewer);
 11:    PetscErrorCode (*flush)(PetscViewer);
 12:    PetscErrorCode (*getsingleton)(PetscViewer,PetscViewer*);
 13:    PetscErrorCode (*restoresingleton)(PetscViewer,PetscViewer*);
 14:    PetscErrorCode (*getsubcomm)(PetscViewer,MPI_Comm,PetscViewer*);
 15:    PetscErrorCode (*restoresubcomm)(PetscViewer,MPI_Comm,PetscViewer*);
 16:    PetscErrorCode (*setfromoptions)(PetscViewer);
 17: };

 19: /*
 20:    Defines the viewer data structure.
 21: */
 22: struct _p_PetscViewer {
 23:   PETSCHEADER(struct _PetscViewerOps);
 24:   PetscViewerFormat format,formats[10];
 25:   int               iformat;   /* number of formats that have been pushed on formats[] stack */
 26:   void              *data;
 27: };



 31: #endif