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Re: Determining machine endian-ness [message #12144 is a reply to message #12143]

Wed, 01 July 1998 00:00

mallors
Messages: 76
Registered: November 1997

Member

In article <EvBpCE.Hru@midway.uchicago.edu>,
rivers@cars3.uchicago.edu (Mark Rivers) writes:
>
> Is there a way to determine whether the machine on which IDL is executing is
> big endian or little endian? I am trying to read a data file which I know
> contains little-endian data. I need to byte swap this data if IDL is running
> on a big-endian machine, but not byte-swap if it is running on a little-endian
> machine.
>
> It would be nice there were a field in !VERSION which contained this
> information. Right now I am testing if !VERSION.ARCH eq 'x26', 'alpha', etc.
> There must be a better way.
>

Hi,

I think this should do it:

LITTLE_ENDIAN = (BYTE (1, 0, 1))[0]

IF (LITTLE_ENDIAN) THEN $
PRINT, "I'm little endian"

--
Robert S. Mallozzi
http://cspar.uah.edu/~mallozzir/

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[Message index]

		Re: Determining machine endian-ness By: callen on Thu, 02 July 1998 00:00
		Re: Determining machine endian-ness By: Kelly Dean on Thu, 02 July 1998 00:00
		Re: Determining machine endian-ness By: pit on Thu, 02 July 1998 00:00
		Re: Determining machine endian-ness By: menakkis on Thu, 02 July 1998 00:00
		Re: Determining machine endian-ness By: davidf on Wed, 01 July 1998 00:00
		Re: Determining machine endian-ness By: mallors on Wed, 01 July 1998 00:00

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