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H5A_ITERATE

Calls a user’s function for each attribute on an object

Signature:

herr_t H5Aiterate
(
    hid_t          loc_id,
    unsigned      *idx,
    H5A_operator_t op,
    void          *op_data
)
herr_t H5Aiterate
(
    hid_t           obj_id,
    H5_index_t      idx_type,
    H5_iter_order_t order,
    hsize_t        *n,
    H5A_operator2_t op,
    void           *op_data
)

Description:

H5A_ITERATE is a macro that is mapped to either  H5A_ITERATE1  or  H5A_ITERATE2, depending on the needs of the application.

Such macros are provided to facilitate application compatibility. For example:

  • The H5A_ITERATE macro will be mapped to H5A_ITERATE1 and will use the H5A_ITERATE1 syntax (first signature above) if an application is coded for HDF5 Release 1.6.x.
  • The H5A_ITERATE macro mapped to H5A_ITERATE2 and will use the H5A_ITERATE2 syntax (second signature above) if an application is coded for HDF5 Release 1.8.x.

Macro use and mappings are fully described in API Compatibility Macros in HDF5; we urge you to read that document closely.

When both the HDF5 library and the application are built and installed with no specific compatibility flags, H5A_ITERATE  is mapped to the most recent version of the function, currently H5A_ITERATE2. If the library and/or application is compiled for Release 1.6 emulation, H5A_ITERATE  will be mapped to H5A_ITERATE1. Function-specific flags are available to override these settings on a function-by-function basis when the application is compiled.

Specific compile-time compatibility flags and the resulting mappings are as follows:

Compatibility settingH5Aiterate mapping

Global settings
No compatibility flagH5A_ITERATE2 
Enable deprecated symbolsH5A_ITERATE2 
Disable deprecated symbolsH5A_ITERATE2 
Emulate Release 1.6 interface    H5A_ITERATE1 

Function-level macros
H5Aiterate_vers = 2H5A_ITERATE2
H5Aiterate_vers = 1H5A_ITERATE1

 

Interface history:   Signature [1] above is the original H5Aiterate interface and the only interface available prior to HDF5 Release 1.8.0. This signature and the corresponding function are now deprecated but will remain directly callable as H5A_ITERATE1.

Signature [2] above was introduced with HDF5 Release 1.8.0 and is the recommended and default interface. It is directly callable as H5A_ITERATE2.

See API Compatibility Macros in HDF5 for circumstances under which either of these functions might not be available in an installed instance of the HDF5 library.

History:
Release    C
1.8.0The function H5Aiterate renamed to H5Aiterate1 and deprecated in this release. 
The macro H5Aiterate and the functions H5Aiterate2 and H5Aiterate_by_name introduced in this release.

--- Last Modified: April 10, 2018 | 02:34 PM