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Re: Delete COMMON [message #36785 is a reply to message #36779]

Mon, 27 October 2003 15:59

mperrin+news
Messages: 81
Registered: May 2001

Member

trouble <the_cacc@hotmail.com> wrote:
> mperrin+news@cymric.berkeley.edu (Marshall Perrin) wrote in message news:<bnjhb4$24t7$1@agate.berkeley.edu>...
>>
>> Why do you need to delete the common block? Would deleting all the variables
>> in it be sufficient? See, e.g. delvarx.pro:
>> http://astro.uni-tuebingen.de/software/idl/astrolib/misc/del varx.pro
>>
>> - Marshall
>
>
> Yes, all I need to do is delete the variables. Problem is, it's only
> used deep within a couple of routines, yet I want to destroy it in the
> top level calling function.
>
> It's just so unbearably *painful* to put the COMMON from the numerical
> code into the GUI code and then delete it! COMMON blocks have feelings
> too, you know.

I agree that needlessly proliferating common blocks is no good. I see
two ways out of this situation: One, rewrite the code to not use common
blocks. This may be more of a hassle than it's worth; the way I do this is
to stick all the state into some struct, which then gets passed around
as needed. The problem is that if you expect variable-sized data, you
have to convert everything over to use pointers to access it.

Alternatively, and almost certainly vastly easier, is to modify the
parts of your code that has this common routine to have an initialize()
or clear() function of some kind, which would itself be called from the
top level GUI. That's probably what I would do in your situation...

- Marshall

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[Message index]

		Re: Delete COMMON By: the_cacc on Tue, 28 October 2003 12:43
		Re: Delete COMMON By: mperrin+news on Mon, 27 October 2003 15:59
		Re: Delete COMMON By: the_cacc on Mon, 27 October 2003 15:30
		Re: Delete COMMON By: Pavel Romashkin on Mon, 27 October 2003 09:08
		Re: Delete COMMON By: David Fanning on Mon, 27 October 2003 08:36
		Re: Delete COMMON By: mperrin+news on Mon, 27 October 2003 08:32

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