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Re: filename check [message #22222 is a reply to message #22084]

Tue, 24 October 2000 00:00

Dick Jackson
Messages: 347
Registered: August 1998

Senior Member

"Stuart Colley" <src@star.ucl.ac.uk> wrote...
>
> Can anyone suggest a way to check that a file exists before attempting to
> read from it, since the error messages obtained from trying to read from a
> non-existing file, don't make it clear that file doesn't exist.

Of course, the solutions in all the other replies point to why this was
needed, and now appears in IDL 5.4:

IDL> Print, File_Test('image.gif')
0
IDL> Print, File_Test('image.tif')
1

File_Test has many fancy keywords for "what kind of file do you expect to
find?", etc.:

[, /DIRECTORY | , /EXECUTABLE | , /READ | , /REGULAR | , /WRITE | ,
/ZERO_LENGTH] [, GET_MODE=variable]

Cheers,
--
-Dick

Dick Jackson / dick@d-jackson.com
D-Jackson Software Consulting / http://www.d-jackson.com
Calgary, Alberta, Canada / Voice/Fax: +1-403-242-7398

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[Message index]

		filename check By: Stuart Colley on Tue, 24 October 2000 00:00
		Re: filename check By: R.Bauer on Wed, 25 October 2000 00:00
		Re: filename check By: Edward Max Pottasch on Tue, 24 October 2000 00:00
		Re: filename check By: Paul van Delst on Tue, 24 October 2000 00:00
		Re: filename check By: Dick Jackson on Tue, 24 October 2000 00:00
		Re: filename By: Pavel A. Romashkin on Wed, 07 February 2001 09:20
		Re: filename By: Martin Schultz on Wed, 07 February 2001 05:21

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