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Re: Market for an IDL to Java Translator? [message #55132 is a reply to message #55057]

Tue, 31 July 2007 12:21

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

Brian Larsen wrote:
> Eric,
>
> while this is an interesting idea I think going the other way is what
> people are most interested in. A translator from C or Fortran (yuk)
> to IDL would be something I would pay for, but I imagine this being a
> nearly impossible task to make "good" array based IDL code from c or
> fortan.

Over the years I've converted a good portion of my old IDL code in Fortran95. Everyone has
a f95 compiler (or can get one for free), but not as many people have (or can afford) IDL
licenses. (Wasn't IDL originally written in Fortran -- well, FORTRAN -- way back in the
old olden days on VMS systems?)

Creating on-the-fly things in Fortran is obviously more difficult i.e. it's strongly typed
and you have to allocate arrays as required. In IDL you would do

m = 100 & n = 24
x = FLTARR(100,24)
y = x

whereas in f95 you would do,

REAL, PARAMETER :: zero = 0.0
REAL, ALLOCATABLE :: x(:), y(:)
INTEGER :: m, n

m = 100; n = 24
ALLOCATE( x(m,n), y(m,n) )
x = zero
y = x

Apart from the type declarations, same dog different leg.

(although, Fortran2003 doesn't do OO like IDL does. :o)

> While from a nice platform independent language (IDL) to another such
> language (java) w/o all the gui bells and whistles doesn't sell for
> me.

Agreed.

cheers,

paulv

--
Paul van Delst

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[Message index]

		Re: Market for an IDL to Java Translator? By: mattf on Tue, 31 July 2007 03:55
		Re: Market for an IDL to Java Translator? By: Robbie on Mon, 30 July 2007 14:31
		Re: Market for an IDL to Java Translator? By: Brian Larsen on Mon, 30 July 2007 12:28
		Re: Market for an IDL to Java Translator? By: Paul Van Delst[1] on Tue, 31 July 2007 12:21

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