<pre><code class="language-c">herr_t H5Aget_info_by_idx(
            hid_t loc_id, 
            const char *obj_name, 
            H5_index_t idx_type, 
            H5_iter_order_t order, 
            hsize_t n, 
            H5A_info_t *ainfo, 
            hid_t lapl_id
    )
  </code></pre>

<pre><code class="language-fortran">Fortran90 Interface: h5aget_info_by_idx_f
    
SUBROUTINE h5aget_info_by_idx_f(loc_id, obj_name, idx_type, order, n, &
     f_corder_valid, corder, cset, data_size, hdferr, lapl_id)
  IMPLICIT NONE
  INTEGER(HID_T), INTENT(IN) :: loc_id   
                             ! Object identifier
  CHARACTER(LEN=*), INTENT(IN) :: obj_name  
                             ! Name of object to which attribute is attached
  INTEGER, INTENT(IN) :: idx_type        
                             ! Type of index; Possible values are:
                             !   H5_INDEX_UNKNOWN_F   - Unknown index type
                             !   H5_INDEX_NAME_F      - Index on names
                             !   H5_INDEX_CRT_ORDER_F - Index on creation order
                             !   H5_INDEX_N_F	      - Number of indices defined
  INTEGER, INTENT(IN) :: order              
                             ! Order in which to iterate over index:
                             !   H5_ITER_UNKNOWN_F  - Unknown order
                             !   H5_ITER_INC_F      - Increasing order
                             !   H5_ITER_DEC_F      - Decreasing order
                             !   H5_ITER_NATIVE_F   - No particular order, 
                             !                        whatever is fastest
  INTEGER(HSIZE_T), INTENT(IN) :: n     
                             ! Attribute’s position in index

  LOGICAL, INTENT(OUT) :: f_corder_valid 
                             ! Indicates whether the creation order data is 
                             ! valid for this attribute 
  INTEGER, INTENT(OUT) :: corder 
                             ! Is a positive integer containing the creation 
                             !order of the attribute
  INTEGER, INTENT(OUT) :: cset   
                             ! Indicates the character set used for the 
                             ! attribute’s name
  INTEGER(HSIZE_T), INTENT(OUT) :: data_size   
                             ! Indicates the size, in the number of characters, 
                             ! of the attribute
  INTEGER, INTENT(OUT) :: hdferr       
                             ! Error code:
                             ! 0 on success and -1 on failure
  INTEGER(HID_T), OPTIONAL, INTENT(IN) :: lapl_id  
                             ! Link access property list
END SUBROUTINE h5aget_info_by_idx_f  
	</code></pre>