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Re: on_ioerror? [message #11891 is a reply to message #11883]

Wed, 03 June 1998 00:00

davidf
Messages: 2866
Registered: September 1996

Senior Member

Dallas Masters (dallas@lanl.gov) writes:

> I'm running read_gif and read_tiff in a loop.
> If an I/O error occurs, I want to print an error message
> and continue going through the loop. Given read_gif
> and read_tiff, how would this be done (I've tried, nothing
> works yet). Thanks.

I just looked at the code for these two routines and both
return to the caller of the program when an error occurs
(ON_ERROR, 2). I should think a simple CATCH in the routine
that called either one of these programs would catch
errors. Then you could proceed in whatever manner seemed
appropriate.

Your code might look like this:

Catch, error
IF error NE 0 THEN BEGIN
Print, !Err_String
CASE loopFlag OF
1: GOTO, GIF_LOOP
2: GOTO, TIFF_LOOP
ENDCASE
ENDIF

loopFlag = 1
GIF_LOOP:
FOR j=0,n, DO READ_GIF, ....

loopFlag = 2
TIFF_LOOP:
for j=0, n DO READ_TIFF, ...

This is pseudo code, of course. :-)

Cheers,

David

-----------------------------------------------------------
David Fanning, Ph.D.
Fanning Software Consulting
E-Mail: davidf@dfanning.com
Phone: 970-221-0438
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		Re: on_ioerror? By: davidf on Thu, 04 June 1998 00:00
		Re: on_ioerror? By: steinhh on Thu, 04 June 1998 00:00
		Re: on_ioerror? By: davidf on Wed, 03 June 1998 00:00

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