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Re: Help: Byte-swapping program [message #3326 is a reply to message #3324]

Mon, 12 December 1994 12:16

grunes
Messages: 68
Registered: September 1993

Member

> Yes, but neither of those seem to be sufficient. In my case (and I
> believe in the case of the original poster), we've got VAX floating
> point numbers to be read into IEEE format on a machine who's local
> format *is* IEEE. Unless I'm missing something in my reading of the
> manual, that's not covered by IDL's conversion functions.
> I've got some code lying around somewhere that I wrote to go from
> VAX to IEEE floating point (single-precision), which I'll dig up if
> I don't see any other solution go by before I get back from my travels.

The Fortran code for routine FromVaxR4 that I posted in my original
response would do the that part of the job. Since the person was
working on a Sun--in Sun Fortran, if you do
open(1,file=name,access='direct',recl=1,form='unformatted')
and you want to look at the real*4 number at byte # n (where the first
byte is #1), you would say
read(1,rec=n)i
and say
x=FromVaxR4(i)
to convert it to local floating point. Similar open and write
statements could output to a local format file. Most other Fortrans
have some form of open to do a similar job.

However, I imagine most readers of this newsgroup prefer to use IDL
or PV-Wave. Perhaps someone with time on their hands would like
to translate my code to IDL/Wave?
(opinions expressed are mine alone)
Mitchell R Grunes (grunes@nrlvax.nrl.navy.mil)
Allied-Signal Technical Services
c/o Code 8140 Naval Research Lab

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[Message index]

		Re: Help: Byte-swapping program By: thompson on Tue, 13 December 1994 07:57
		Re: Help: Byte-swapping program By: thompson on Tue, 13 December 1994 07:50
		Re: Help: Byte-swapping program By: grunes on Mon, 12 December 1994 12:16
		Re: Help: Byte-swapping program By: plutchak on Mon, 12 December 1994 10:54
		Re: Help: Byte-swapping program By: thompson on Mon, 12 December 1994 08:04
		Re: Help: Byte-swapping program By: grunes on Mon, 12 December 1994 07:39
		Re: Help: Byte-swapping program By: grunes on Mon, 12 December 1994 07:12

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