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Re: Bug? yea or nay. [message #23803 is a reply to message #23727]

Mon, 19 February 2001 04:21

Nigel Wade
Messages: 286
Registered: March 1998

Senior Member

>>>> >>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<<

On 16/02/01, 14:35:09, Paul van Delst <pvandelst@ncep.noaa.gov> wrote
regarding Re: Bug? yea or nay.:

> Also, FWIW, I disagree with Nigel Wade that this is "operator error". I
think N_TAGS
> should return the sum total of the sizes of the structure elements, NOT
the amount of
> memory said structure occupies.

But it doesn't, and the documentation quite clearly says it doesn't.
That's why I said "operator error" and not "bug".

> If one was dealing with accessing system memory for OS
> purposes, fine. But IDL is a simple tool for playing with data - why
should the user care
> whether the structure is padded in memory or not?

The user may want to find out how much memory would be used by a large
array of structures.
You can actually work out the sum of the size of the individual elements,
but you cannot
work out the amount of memory required to hold the structure.

--
-----------------------------------------------------------
Nigel Wade, System Administrator, Space Plasma Physics Group,
University of Leicester, Leicester, LE1 7RH, UK
E-mail : nmw@ion.le.ac.uk
Phone : +44 (0)116 2523568, Fax : +44 (0)116 2523555

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[Message index]

		Re: Bug? yea or nay. By: Dave Greenwood on Fri, 16 February 2001 08:25
		Re: Bug? yea or nay. By: Craig Markwardt on Fri, 16 February 2001 07:22
		Re: Bug? yea or nay. By: Paul van Delst on Fri, 16 February 2001 06:35
		Re: Bug? yea or nay. By: Paul van Delst on Fri, 16 February 2001 06:16
		Re: Bug? yea or nay. By: Nigel Wade on Fri, 16 February 2001 02:43
		Re: Bug? yea or nay. By: William Daffer on Thu, 15 February 2001 20:21
		Re: Bug? yea or nay. By: Todd Clements on Thu, 15 February 2001 15:57
		Re: Bug? yea or nay. By: Paul van Delst on Thu, 15 February 2001 14:34
		Re: Bug? yea or nay. By: Nigel Wade on Mon, 19 February 2001 04:21

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