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Re: LINKIMAGE problem (beginner) [message #11209 is a reply to message #11204]

Sat, 07 March 1998 00:00

davidf
Messages: 2866
Registered: September 1996

Senior Member

Reinhold Schaaf (Kakadu42@gmx.net) writes:

"LINKIMAGE problem (beginner)". Sigh...

> I want an IDL program call C subroutines. Since the CALL_EXTERNAL
> mechanism seems to provide no possiblities for typechecking (?) I want
> to use LINKIMAGE, where typechecking can (and must) be done. Everything
> is pretty nasty (I really don't like pointers on pointers on pointers
> ...), but anyway.

Here is a piece of free, unsolicited advice:

Do your type checking of variables in IDL *before* you call
your C subroutine with Call_External. I can almost guarantee
that you will be *much* happier with your progress. :-)

Cheers,

David

P.S. You can use the SIZE function for type checking.

-----------------------------------------------------------
David Fanning, Ph.D.
Fanning Software Consulting
E-Mail: davidf@dfanning.com
Phone: 970-221-0438
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		Re: LINKIMAGE problem (beginner) By: rivers on Thu, 12 March 1998 00:00
		Re: LINKIMAGE problem (beginner) By: Nigel Wade on Mon, 09 March 1998 00:00
		Re: LINKIMAGE problem (beginner) By: davidf on Sat, 07 March 1998 00:00

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