Is there a sizeof() vi in labview?

[Ian2]

I would like to get the size (in bytes) of various labview data types. Is there i vi which will do this? I can't find one. It seems flatten to string followed by string length does the job, but its a of shame having to create a string just for this...

Ian

[CoastalMaineBird]

That's the way I do it. It's quite useful when sending TCP/IP headers as structures: I just flatten the structure to a string, and get the string-length of it. The receiver should receive that many bytes and then unflatten it.

If the structure is not dynamic (has no arrays or strings), then you can do it once and store the size someplace.

[chutla]

Look in Array Functions, and pick "array size". It will give you the size of each of the dimensions in your data array.

Eric

[pawel]

Hi Coastal

I do not think that flattening is the proper way to do it. "Flatten to string" will add additional elements before every compound of a struct, describing the type of the variable.

I think, that the proper way is to use "TypeCast" function, located in "advanced->datamanipulation". That will not add any extra elements to the flattened structure.

regards
Pawel

[chilly_charly]

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@pawel wrote:
I think, that the proper way is to use "TypeCast" function, located in "advanced->datamanipulation". That will not add any extra elements to the flattened structure.

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Hi Pawel !
That works...except if you try to wire a cluster containing a string ! 😄 😄 😄
CC

[pawel]

Hi Chilly Charly

You are absolutelly right. One hour ago I post a mail with this question. :).

cheers
Pawel

[chilly_charly]

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@pawel wrote:
Hi Chilly Charly

You are absolutelly right. One hour ago I post a mail with this question. :).

cheers
Pawel

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Sure, I rated it 5 stars. It's a very odd behaviour...

Cheers,

CC