Opens an object using its address within an HDF5 file
Procedure:
H5O_OPEN_BY_ADDR(loc_id, addr)
Signature:
hid_t H5Oopen_by_addr( hid_t loc_id, haddr_t addr )
SUBROUTINE h5oopen_by_addr_f(loc_id, addr, obj_id, hdferr)
IMPLICIT NONE
INTEGER(HID_T) , INTENT(IN) :: loc_id
INTEGER(HADDR_T), INTENT(IN) :: addr
INTEGER(HID_T) , INTENT(OUT) :: obj_id
INTEGER , INTENT(OUT) :: hdferr
Parameters:
hid_t loc_id | IN: Location identifier; may be a file, group, dataset, named datatype, or attribute identifier |
haddr_t addr | IN: Object’s address in the file |
Description:
H5O_OPEN_BY_ADDR opens a group, dataset, or committed (named) datatype using its address within an HDF5 file, addr. The resulting opened object is identical to an object opened with H5O_OPEN and should be closed with H5O_CLOSE or an object-type-specific closing function (such as H5G_CLOSE) when no longer needed.
loc_id is a location identifier in the file.
The object’s address within the file, addr, is the byte offset of the first byte of the object header from the beginning of the HDF5 file space, i.e., from the beginning of the super block (see the “HDF5 Storage Model” section of the The HDF5 Data Model and File Structure chapter of the HDF5 User's Guide.
addr can be obtained via either of two function calls. H5G_GET_OBJINFO returns the object’s address in the objno field of the H5G_stat_t struct; H5L_GET_INFO returns the address in the address field of the H5L_linkinfo_t struct.
The address of the HDF5 file on a physical device has no effect on H5O_OPEN_BY_ADDR , nor does the use of any file driver. As stated above, the object address is its offset within the HDF5 file; HDF5’s file drivers will transparently map this to an address on a storage device.
Returns:
Returns an object identifier for the opened object if successful; otherwise returns a negative value.
Example:
History:
| Release | Change |
| 1.8.0 | Function introduced in this release. |
| 1.8.4 | Fortran subroutine added in this release. |
--- Last Modified: May 08, 2018 | 10:03 AM
