Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!decwrl!decvax!tektronix!tekcae!kurtk
From: kurtk@tekcae.TEK.COM (Kurt Krueger)
Newsgroups: comp.os.vms
Subject: Re: LIB$ functions from C
Message-ID: <1468@tekcae.TEK.COM>
Date: 17 Feb 88 16:40:39 GMT
References: <339@dalcsug.UUCP> <215@sdrc.UUCP>
Reply-To: kurtk@tekcae.UUCP (Kurt Krueger)
Organization: Tektronix, Inc., Beaverton, OR.
Lines: 12
Keywords: how do you do it?

I believe the problem lies in the fact that LIB$ routines almost always want
character data passed by DESCRIPTOR.  Fortran does this automatically, but
C doesn't.  Read the section about calling from C and pay close attention
to descriptors.  There is even a macro provided for creating a descriptor
for a constant string.

#include descrip.h
$DESCRIPTOR(string,"[USER]THIS.IS.THE.PATH");
	LIB$whatever(&string); /* Pass the ADDRESS of the descriptor */

For more advanced use, you will need to access the individual fields of the
$DESCRIPTOR structure.