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Re: CALL_EXTERNAL [message #1267 is a reply to message #1198]

Wed, 18 August 1993 16:31

jim
Messages: 7
Registered: August 1993

Junior Member

In article <Aug18.163808.52294@yuma.ACNS.ColoState.EDU> dean%phobos.dnet@sirius.cira.colostate.edu writes:
>
> I am using CALL_EXTERNAL to call a C routine to open a certain file with
> a special image format. However, the C routine is not getting the right
> file name which is a character string. A FORTRAN routine gets the right
> character string from CALL_EXTERNAL, but the C routine doesn't. Can someone
> provide me with some hints on how to get IDL to pass the right character
> string to my C routine through CALL_EXTERNAL?
>
You neglected to say what kind of system you are running on. However,
problems passing strings between C and Fortran programs are common in
many environments. Try forcing the string to contain a null (all bits zero)
as the last character, and be sure the C routine references the string
properly. You may be getting the address of the string when you need the
address of the address, or some such, depending on machine and OS.

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[Message index]

		CALL_EXTERNAL/shared libraries on HP By: keith on Thu, 01 July 1993 11:56
		Re: CALL_EXTERNAL By: jacobsen on Fri, 20 August 1993 06:12
		Re: CALL_EXTERNAL By: jim on Wed, 18 August 1993 16:31

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