Fortran to IDS Interface

We have a rather aged application written in Fortran that we need to interface to an existing I4GL application. We own the rights to the source code of both applications. Ideally, the Fortran application needs to populate tables in the Informix application. Anybody out there achieved anything of this ilk? SCO OpenServer 5.0.4 IDS 7.30.UC2 I4GL 7.20.UD7 Glyn Balmer BICC Cables Limited Erith Kent UK -- "Nothing succeeds like a toothless budgerigar" -----------== Posted via Deja News, The Discussion Network ==---------- http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own

glynb@bicceri.demon.co.uk wrote: > > We have a rather aged application written in Fortran that we need to > interface to an existing I4GL application. We own the rights to the source > code of both applications. Ideally, the Fortran application needs to populate > tables in the Informix application. Anybody out there achieved anything of > this ilk? > > SCO OpenServer 5.0.4 > IDS 7.30.UC2 > I4GL 7.20.UD7 Assuming the FORTRAN you are using is C-linkable this is doable but not pretty. 4GL uses a stack paradigm and so there is an API for writing "C" to call it, and FORTRAN names functions, internally, with a trailing underscore and mapped lower case and FORTRAN calls by reference ONLY so you cannot write a 4GL callable function in FORTRAN because the only argument is an INT passed by value. Therefore you cannot write 4GL that is FORTRAN callable or FORTRAN that is 4GL callable you will have to write "C", or ESQL/C, glue code to bind these. You can write a FORTRAN callable function in C that then calls 4GL functions and you can write 4GL callable functions that in turn call a FORTRAN function. We have done this here for ESQL/C. Art S. Kagel