H5Tget_offset
(
hid_t dtype_id
)
H5Tget_offset
retrieves the bit offset of the first significant bit.
The significant bits of an atomic datum can be offset from the beginning
of the memory for that datum by an amount of padding. The `offset'
property specifies the number of bits of padding that appear to the
"right of" the value. That is, if we have a 32-bit datum with 16-bits
of precision having the value 0x1122 then it will be laid out in
memory as (from small byte address toward larger byte addresses):
Byte Position | Big-Endian Offset=0 | Big-Endian Offset=16 | Little-Endian Offset=0 | Little-Endian Offset=16 |
---|---|---|---|---|
0: | [ pad] | [0x11] | [0x22] | [ pad] |
1: | [ pad] | [0x22] | [0x11] | [ pad] |
2: | [0x11] | [ pad] | [ pad] | [0x22] |
3: | [0x22] | [ pad] | [ pad] | [0x11] |
hid_t dtype_id |
IN: Identifier of datatype to query. |
SUBROUTINE h5tget_offset_f(type_id, offset, hdferr) IMPLICIT NONE INTEGER(HID_T), INTENT(IN) :: type_id ! Datatype identifier INTEGER(SIZE_T), INTENT(OUT) :: offset ! Datatype bit offset of the ! first significant bit INTEGER, INTENT(OUT) :: hdferr ! Error code ! 0 on success and -1 on failure END SUBROUTINE h5tget_offset_f