Reading CA FAVER Format Files › GVFILE

GVFILE

Deblocking is removing CA FAVER control information from an EXPORT file to allow an application program to read a CA FAVER format tape. The GVFILE subroutine locates clusters on an EXPORT file and deblocks them. You should include GVFILE in the link-edit of the calling program.

With GVFILE, an application program can read logical data records from an export tape created by the following:

• CA FAVER
• CA FAVER for VSE
• CA FAVER2 for VSE

GVFILE has three entry points whose names are used when their specific functions are called. The following are the GVFILE entry points:

• GVOPEN
• GVREAD
• GVCLOSE

There are two different ways to call these entry points:

1. Include GVFILE in the link-edit with your program. In this method, you would reference the entry point names directly.
2. LINK to GVFILDYN first. This dynamically loads GVFILE and establishes the entry point names for GVOPEN, GVREAD, and GVCLOSE. After LINKing to GVFILDYN, it is then possible to LOAD the entry point names GVOPEN, GVREAD, and GVCLOSE.

Detailed examples are provided in this appendix.