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Re: Need prog to give size of a structure in bytes [message #13640 is a reply to message #13638]

Fri, 20 November 1998 00:00

Joe Means
Messages: 44
Registered: November 1996

Member

I like your idea, David, but the length= from help is not close to the size of the
file when it is written out in binary.
IDL> help, /struct, headout
** Structure SMALLFOOTHEADER, 7 tags, length=272:
VERSION STRING 'smallfootheader1 '
TOTSHOTCOUNT LONG 0
DATUM STRING '83'
DATATYPE STRING 'utm'
NUMFILES INT 1
SHOTCOUNTS LONG Array[20]
FILENAMES STRING Array[20]
While the size of the file when written and closed is 1496 bytes. The filename
strings are each 70 characters long. Any ideas on this?

--Joe

David Fanning wrote:

> Snip....
>
> Help, struct, /Structure, Output=structInfo
> stuffIWant = structInfo[0]
> lengthInBytes = ParseIt(stuffIWant)
>
> I'll leave the ParseIt routine as an exercise for the reader. ;-)
>
> Cheers,
>
> David
>
> P.S. RSI warns you that following the instructions above
> may lead to heartache. I echo their comments.

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[Message index]

		Re: Need prog to give size of a structure in bytes By: R.Bauer on Thu, 26 November 1998 00:00
		Re: Need prog to give size of a structure in bytes By: Michael Hartman on Fri, 20 November 1998 00:00
		Re: Need prog to give size of a structure in bytes By: Brian Jackel on Fri, 20 November 1998 00:00
		Re: Need prog to give size of a structure in bytes By: Joe Means on Fri, 20 November 1998 00:00
		Re: Need prog to give size of a structure in bytes By: davidf on Fri, 20 November 1998 00:00

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