4 Fortran interface

A Fortran interface is provided that uses the original names of the subroutines rather than C function names. For example, the C routine gsdOpenRead should be called from Fortran as gsd_open_read. The Fortran binding is incomplete (only covering the supplied C routines) and existing Fortran code may have to be changed before this library can be used. An example routine (gsd_print.f) is provided to demonstrate the interface. Additional changes:

• The Fortran include file is now called GSD_PAR to fit in with the Starlink naming convention (as opposed to GSDPARS in the original VAX library).
• GSD_PAR is incomplete. Prior inclusion of PRM_PAR is required before GSD_PAR can be included.
• Error status values have changed. Zero is good status, non-zero is bad status, but no particular status value can be expected.
• gsd_inquire_array is not implemented. Instead gsd_inq_size must be used, although it was previously labelled “obsolete”.