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Re: Max number of elements in an array [message #54021 is a reply to message #53905]

Mon, 14 May 2007 05:48

Paolo Grigis
Messages: 171
Registered: December 2003

Senior Member

Jean H. wrote:
> Hi all,
>
> I can't remember this... what is the type of the variable used to index
> an array? ... in other words, what is the max number of elements an
> array can hold, provided the memory is available? Is there a way to
> change that, so I can use, let's say, an unsigned long 64?

In the 32-bits version, signed longs are used.
Thus the max number of elements of a byte array is (2^31-offset),
where offset is a small number (around 10).

IDL 64 bit uses signed double precision longs, and the max number
of elements in a byte array is (2^63-offset) [here the offset seems
to be around 512].

For other numeric types, divide the above numbers by the size in
bytes of one element.

Ciao,
Paolo

>
> Thanks,
>
> Jean

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[Message index]

		Max number of elements in an array By: Jean H. on Tue, 08 May 2007 14:34
		Re: Max number of elements in an array By: Jean H. on Mon, 14 May 2007 09:18
		Re: Max number of elements in an array By: Paolo Grigis on Mon, 14 May 2007 05:48

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