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Re: Determining machine endian-ness [message #12140 is a reply to message #12129]

Thu, 02 July 1998 00:00

menakkis
Messages: 37
Registered: June 1998

Member

Mark Rivers (rivers@cars3.uchicago.edu) asked:
>> Is there a way to determine whether the machine on which IDL is executing is
>> big endian or little endian?

And David Fanning (davidf@dfanning.com) replied:
> I see in the IDL 5.1 on-line help that there are keywords
> SWAP_IF_BIG_ENDIAN and SWAP_IF_LITTLE_ENDIAN to the
> BYTEORDER procedure that allow conditional byte ordering depending
> upon the "endianness" of the machine IDL is running on. Sounds
> like just the ticket. :-)

Even more conveniently, in IDL 5.1 the OPEN routine (now) takes keywords
SWAP_ENDIAN, SWAP_IF_LITTLE_ENDIAN and SWAP_IF_BIG_ENDIAN. These pertain to
the computer running IDL, not the file. Presumably they make READU/WRITEU
(and ASSOC?) smart about byte reordering. Anyone tried them yet?

Cheers
Peter Mason

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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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