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Iterates an operation over the entries of a group.
H5G_ITERATE(loc_id, name, idx, operator, operator_data)
int H5Giterate(hid_t loc_id, const char *name, int *idx, H5G_iterate_t operator, void *operator_data )
There is no direct FORTRAN couterpart for the C function
H5Giterate. Instead, that functionality is provided by two FORTRAN functions:
SUBROUTINE h5gn_members_f(loc_id, name, nmembers, hdferr) IMPLICIT NONE INTEGER(HID_T), INTENT(IN) :: loc_id ! File or group identifier CHARACTER(LEN=*), INTENT(IN) :: name ! Name of the group INTEGER, INTENT(OUT) :: nmembers ! Number of members in the group INTEGER, INTENT(OUT) :: hdferr ! Error code ! 0 on success and -1 on failure END SUBROUTINE h5gn_members_f
SUBROUTINE h5gget_obj_info_idx_f(loc_id, name, idx, & obj_name, obj_type, hdferr) IMPLICIT NONE INTEGER(HID_T), INTENT(IN) :: loc_id ! File or group identifier CHARACTER(LEN=*), INTENT(IN) :: name ! Name of the group INTEGER, INTENT(IN) :: idx ! Index of member object CHARACTER(LEN=*), INTENT(OUT) :: obj_name ! Name of the object INTEGER, INTENT(OUT) :: obj_type ! Object type : ! H5G_LINK_F ! H5G_GROUP_F ! H5G_DATASET_F ! H5G_TYPE_F INTEGER, INTENT(OUT) :: hdferr ! Error code ! 0 on success and -1 on failure END SUBROUTINE h5gget_obj_info_idx_f
|hid_t ||IN: File or group identifier.|
|const char ||IN: Group over which the iteration is performed.|
|int ||IN/OUT: Location at which to begin the iteration.|
|H5G_iterate_t ||IN: Operation to be performed on an object at each step of the iteration.|
|void ||IN/OUT: Data associated with the operation.|
H5Giterate iterates over the members of
name in the file or group specified with
loc_id. For each object in the group, the
operator_data and some additional information, specified below, are passed to the
operator function. The iteration begins with the
idx object in the group and the next element to be processed by the operator is returned in
idx is NULL, then the iterator starts at the first group member; since no stopping point is returned in this case, the iterator cannot be restarted if one of the calls to its operator returns non-zero.
H5Giterate does not recursively follow links into subgroups of the specified group.
The prototype for
The operation receives the group identifier for the group being iterated over,
group_id, the name of the current object within the group,
member_name, and the pointer to the operator data passed in to
The return values from an operator are:
- Zero causes the iterator to continue, returning zero when all group members have been processed.
- Positive causes the iterator to immediately return that positive value, indicating short-circuit success. The iterator can be restarted at the next group member.
- Negative causes the iterator to immediately return that value, indicating failure. The iterator can be restarted at the next group member.
H5Giterate assumes that the membership of the group identified by
name remains unchanged through the iteration. If the membership changes during the iteration, the function's behavior is undefined.
H5Giterate is not recursive. In particular, if a member of
name is found to be a group, call it
H5Giterate does not examine the members of
subgroup_a. When recursive iteration is required, the application must handle the recursion, explicitly calling
H5Giterate on discovered subgroups.
Returns the return value of the last operator if it was non-zero, or zero if all group members were processed. Otherwise returns a negative value.
|1.8.0||Function deprecated in this release.|