- Created by Barbara Jones, last modified on Aug 07, 2019
H5P_SET_FLETCHER32
Sets up use of the Fletcher32 checksum filter
Procedure:
H5P_SET_FLETCHER32 ( plist_id )
Signature:
herr_t H5Pset_fletcher32(
hid_t plist_id
)
Fortran90 Interface: h5pset_fletcher32_f
SUBROUTINE h5pset_fletcher32_f(prp_id, hdferr)
IMPLICIT NONE
INTEGER(HID_T), INTENT(IN) :: prp_id ! Property list identifier
INTEGER, INTENT(OUT) :: hdferr ! Error code
! 0 on success and -1 on failure
END SUBROUTINE h5pset_fletcher32_f
Parameters:
hid_t plist_id IN: Dataset or group creation property list identifier
Description:
H5P_SET_FLETCHER32 sets the Fletcher32 checksum filter in the dataset or group creation property list plist_id.
The Fletcher32 EDC checksum filter was added in HDF5 Release 1.6.0. In the original implementation, however, the checksum value was calculated incorrectly on little-endian systems. The error was fixed in HDF5 Release 1.6.3.
As a result of this fix, an HDF5 library of Release 1.6.0 through Release 1.6.2 cannot read a dataset created or written with Release 1.6.3 or later if the dataset was created with the checksum filter and the filter is enabled in the reading library. (Libraries of Release 1.6.3 and later understand the earlier error and compensate appropriately.)
Work-around: An HDF5 library of Release 1.6.2 or earlier will be able to read a dataset created or written with the checksum filter by an HDF5 library of Release 1.6.3 or later if the checksum filter is disabled for the read operation. This can be accomplished via a call to H5P_SET_EDC_CHECK with the value H5Z_DISABLE_EDC in the second parameter. This has the obvious drawback that the application will be unable to verify the checksum, but the data does remain accessible.
Returns:
Returns a non-negative value if successful; otherwise returns a negative value.
Example:
Include Bitbucket Server for Confluence: An error occured
Connection to Bitbucket Server could not be established. Verify that you have properly configured the Bitbucket Server application link for your Confluence space and that your Bitbucket Server instance is up and running. Error details: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
Include Bitbucket Server for Confluence: An error occured
Connection to Bitbucket Server could not be established. Verify that you have properly configured the Bitbucket Server application link for your Confluence space and that your Bitbucket Server instance is up and running. Error details: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
History:
| Release | Change |
|---|---|
| 1.6.0 | Function introduced in this release. |
| 1.6.3 | Error in checksum calculation on little-endian systems corrected in this release. |
| 1.8.5 | Function extended to work with group creation property lists. |
--- Last Modified: August 07, 2019 | 02:28 PM