- Created by Barbara Jones, last modified on Dec 20, 2018
H5A_GET_INFO_BY_IDX
Retrieves attribute information, by attribute index position
Procedure:
H5A_GET_INFO_BY_IDX ( loc_id, obj_name, idx_type, order, n, ainfo, lapl_id )
Signature:
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
)
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
Parameters:
hid_t loc_id | IN: Location identifier of object to which attribute is attached; may be a file, group, dataset or named datatype |
const char *obj_name | IN: Name of object to which attribute is attached, relative to location |
H5_index_t idx_type | IN: Type of index |
H5_iter_order_t order | IN: Index traversal order |
hsize_t n | IN: Attribute’s position in index |
H5A_info_t *ainfo | OUT: Struct containing returned attribute information |
hid_t lapl_id | IN: Link access property list |
Description:
H5A_GET_INFO_BY_IDX retrieves information for an attribute that is attached to an object, which is specified by its location and name, loc_id and obj_name, respectively. The attribute is located by its index position and the attribute information is returned in the ainfo struct.
If loc_id fully specifies the object to which the attribute is attached, obj_name should be '.' (a dot).
The attribute is located by means of an index type, an index traversal order, and a position in the index, idx_type, order and n, respectively. These parameters and their valid values are discussed in the description of H5A_ITERATE2.
The ainfo struct, which will contain the returned attribute information, is described in H5A_GET_INFO.
The link access property list, lapl_id, may provide information regarding the properties of links required to access the object, obj_name. See “Link Access Properties” in the H5P APIs.
Returns:
Returns a non-negative value if successful; otherwise returns a negative value.
Example:
Coming Soon!
History:
| Release | Change |
|---|---|
| 1.8.0 | Function introduced in this release. |
--- Last Modified: December 20, 2018 | 01:59 PM