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Re: Need prog to give size of a structure in bytes [message #13639 is a reply to message #13638]

Fri, 20 November 1998 00:00

Brian Jackel
Messages: 34
Registered: January 1998

Member

Not an obvious place to look, but from the docs:

========================================================
The N_TAGS function returns the number of structure
tags contained in a structure expression. It optionally
returns the size, in bytes, of the structure.
...
Keywords

LENGTH
Set this keyword to return the length of the structure, in bytes.

Note: The length of a structure is machine dependent.
The length of a given structure will vary depending
upon the host machine. IDL pads and aligns structures
in a manner consistent with the host machine's C compiler.
============================================================

I'm not sure if this works recursively (ie. structures in
structures). If not, and you need that, then drop me a
line. I've got some old code that does the general case,
but it's got some hardwired assumptions about how big
certain variable type are. Probably safe....

Hope this helps.

Brian Jackel

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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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