Name: H5Lis_registered
Signature:
htri_t H5Lis_registered( H5L_type_t link_cls_id )

Purpose:
Determines whether a class of user-defined links is registered.

Description:
H5Lis_registered tests whether a user-defined link class is currently registered, either by the HDF5 Library or by the user through the use of H5Lregister.

A link class must be registered to create new links of that type or to traverse exisitng links of that type.

Parameters:
H5L_type_t link_cls_id     IN: User-defined link class identifier

Returns:
Returns a positive value if the link class has been registered and zero if it is unregistered. Otherwise returns a negative value; this may mean that the identifier is not a valid user-defined class identifier.

Fortran90 Interface: H5Lis_registered_f
SUBROUTINE H5Lis_registered_f(link_cls_id, registered, hdferr)
  IMPLICIT NONE
  INTEGER, INTENT(IN) :: link_cls_id  ! User-defined link class identifier
  LOGICAL, INTENT(OUT) :: registered  ! .TRUE.  - if the link class is registered
                                      ! .FALSE. - if it is unregistered
  INTEGER, INTENT(OUT) :: hdferr      ! Error code:
                                      ! 0 on success and -1 on failure
END SUBROUTINE H5Lis_registered_f
    

History:
Release     C
1.8.0 Function introduced in this release.