Signature:

      SUBROUTINE h5literate_f(group_id, index_type, order, idx, &
                op, op_data, return_value, hdferr)
        INTEGER(HID_T)  , INTENT(IN)    :: group_id
        INTEGER         , INTENT(IN)    :: index_type
        INTEGER         , INTENT(IN)    :: order
        INTEGER(HSIZE_T), INTENT(INOUT) :: idx
        TYPE(C_FUNPTR)  , INTENT(IN)    :: op
        TYPE(C_PTR)     , INTENT(IN)    :: op_data
        INTEGER         , INTENT(OUT)   :: return_value
        INTEGER         , INTENT(OUT)   :: hdferr

Inputs:

      group_id   - Identifier specifying subject group
      index_type - Type of index which determines the order:
                    H5_INDEX_NAME_F      - Alpha-numeric index on name
                    H5_INDEX_CRT_ORDER_F - Index on creation order
      order      - Order within index:
                    H5_ITER_INC_F    - Increasing order
                    H5_ITER_DEC_F    - Decreasing order
                    H5_ITER_NATIVE_F - Fastest available order
      idx        - IN: Iteration position at which to start
      op         - Callback function passing data regarding the link to the
                   calling application
      op_data    - User-defined pointer to data required by the application
                   for its processing of the link

Outputs:

      idx          - OUT: Position at which an interrupted iteration may
                              be restarted
      return_value - Success: The return value of the first operator that
                              returns non-zero, or zero if all members were
                              processed with no operator returning non-zero.

                     Failure: Negative if something goes wrong within the
                              library, or the negative value returned by one
                              of the operators.

      hdferr       - Returns 0 if successful and -1 if fails