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From: fauman@cgl.ucsf.edu (Eric Fauman%Stroud)
Newsgroups: comp.lang.c
Subject: calling a fortran routine from C
Message-ID: <10513@cgl.ucsf.EDU>
Date: Fri, 20-Nov-87 15:31:09 EST
Article-I.D.: cgl.10513
Posted: Fri Nov 20 15:31:09 1987
Date-Received: Sun, 22-Nov-87 18:51:59 EST
Organization: UCSF Computer Graphics Lab
Lines: 24
Summary: how can you get a string back from a fortran routine

I am writing some C code now in which I need to use some fortran library
routines.  One routine has a dozen arguments; ints, floats, arrays, and strings.
I can send and receive ints and floats perfectly well (passed by address, of 
course) and I can send strings also by putting the necessary information in
a descriptor structure.  However, when I try to get a string back, I get back
garbage.  The string pointer in the descriptor points off into space.  What
do I need to do to get back a string.      
To recap:  I am passing a pointer to a descriptor.  I had hoped the fortran
would change the contents of the descriptor I had sent, and it does, but
it changes it into something I can't interpret.  I can't change the fortran
code.  I am dealing with passed parameters, not RETURNed values.
 
                                       Thanks in advance,
                                        Eric Fauman  |Fauman@cgl.ucsf.edu
                                        University of California
                                        San Francisco

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Distribution: comp.lang.c
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