PetscViewerHDF5Open#

Opens a file for HDF5 input/output as a PETSCVIEWERHDF5 PetscViewer

Synopsis#

#include "petscviewerhdf5.h" 
PetscErrorCode PetscViewerHDF5Open(MPI_Comm comm, const char name[], PetscFileMode type, PetscViewer *hdf5v)

Collective

Input Parameters#

comm - MPI communicator
name - name of file
type - type of file

Output Parameter#

hdf5v - PetscViewer for HDF5 input/output to use with the specified file

Options Database Keys#

-viewer_hdf5_base_dimension2 - turns on (true) or off (false) using a dimension of 2 in the HDF5 file even if the bs/dof of the vector is 1
-viewer_hdf5_sp_output - forces (if true) the viewer to write data in single precision independent on the precision of PetscReal

Notes#

Reading is always available, regardless of the mode. Available modes are

  FILE_MODE_READ - open existing HDF5 file for read only access, fail if file does not exist [H5Fopen() with H5F_ACC_RDONLY]
  FILE_MODE_WRITE - if file exists, fully overwrite it, else create new HDF5 file [H5FcreateH5Fcreate() with H5F_ACC_TRUNC]
  FILE_MODE_APPEND - if file exists, keep existing contents [H5Fopen() with H5F_ACC_RDWR], else create new HDF5 file [H5FcreateH5Fcreate() with H5F_ACC_EXCL]
  FILE_MODE_UPDATE - same as FILE_MODE_APPEND

In case of FILE_MODE_APPEND / FILE_MODE_UPDATE, any stored object (dataset, attribute) can be selectively overwritten if the same fully qualified name (/group/path/to/object) is specified.

This PetscViewer should be destroyed with PetscViewerDestroy().