2:  #include <petsc/private/tsimpl.h>

  4: typedef struct {
  5:   PetscViewer viewer;
  6: } TSTrajectory_Singlefile;

  8: static PetscErrorCode TSTrajectorySet_Singlefile(TSTrajectory tj,TS ts,PetscInt stepnum,PetscReal time,Vec X)
  9: {
 10:   TSTrajectory_Singlefile *sf = (TSTrajectory_Singlefile*)tj->data;
 11:   PetscErrorCode          ierr;
 12:   const char              *filename;

 15:   if (stepnum == 0) {
 16:     PetscViewerCreate(PETSC_COMM_WORLD,&sf->viewer);
 17:     PetscViewerSetType(sf->viewer,PETSCVIEWERBINARY);
 18:     PetscViewerFileSetMode(sf->viewer,FILE_MODE_WRITE);
 19:     PetscObjectGetName((PetscObject)tj,&filename);
 20:     PetscViewerFileSetName(sf->viewer,filename);
 21:   }
 22:   VecView(X,sf->viewer);
 23:   PetscViewerBinaryWrite(sf->viewer,&time,1,PETSC_REAL,PETSC_FALSE);
 24:   return(0);
 25: }

 27: static PetscErrorCode TSTrajectoryDestroy_Singlefile(TSTrajectory tj)
 28: {
 29:   PetscErrorCode          ierr;
 30:   TSTrajectory_Singlefile *sf = (TSTrajectory_Singlefile*)tj->data;

 33:   PetscViewerDestroy(&sf->viewer);
 34:   PetscFree(sf);
 35:   return(0);
 36: }

 38: /*MC
 39:       TSTRAJECTORYSINGLEFILE - Stores all solutions of the ODE/ADE into a single file followed by each timestep. Does not save the intermediate stages in a multistage method

 41:   Level: intermediate

 43: .seealso:  TSTrajectoryCreate(), TS, TSTrajectorySetType()

 45: M*/
 46: PETSC_EXTERN PetscErrorCode TSTrajectoryCreate_Singlefile(TSTrajectory tj,TS ts)
 47: {
 48:   PetscErrorCode          ierr;
 49:   TSTrajectory_Singlefile *sf;

 52:   PetscNew(&sf);
 53:   tj->data         = sf;
 54:   tj->ops->set     = TSTrajectorySet_Singlefile;
 55:   tj->ops->get     = NULL;
 56:   tj->ops->destroy = TSTrajectoryDestroy_Singlefile;
 57:   return(0);
 58: }