CA Compress/2 › Using Subroutines › IBM Hardware Compression

IBM Hardware Compression

The following lists IBM Hardware Compression subroutines:

Note: The needed IBM Hardware Compression dictionary must be available through STEPLIB, JOBLIB or the linklist. CA strongly recommends that your dictionaries be kept in the linklist. The CA supplied dictionaries are named HC#STDnn where nn is numeric 01–99.

SHRKHCS

Converts an uncompressed record image to compressed form using an IBM Hardware Compression dictionary.

SHRKHCX

Converts a record image compressed with an IBM Hardware Compression dictionary to its original uncompressed form.

SHRKHCC

Frees the dynamic area acquired by SHRKHCS or SHRKHCX. Because another application in the address space may be using the dictionary, SHRKHCC does not issue DELETE to remove it from storage. You can do so yourself when you no longer need it.

If you supply your own dictionary, it must be named HC#USRnn where nn is numeric 00—27. The compression dictionary must be immediately followed by the expansion dictionary in one load module. Both the compression and expansion routines expect the whole module and fail if both dictionaries are not provided in this order.