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Re: File test [message #4432 is a reply to message #4430]

Wed, 31 May 1995 00:00

sjt
Messages: 72
Registered: November 1993

Member

William Thompson (thompson@orpheus.nascom.nasa.gov) wrote:

[ Original specification deleted]

: Actually, that's why I use. I find it extremely fast, much faster than the IDL
: built-in function called FINDFILE. I would, however, suggest modifying your
: routine to read

: FUNCTION fexists, file
: ON_IOERROR, error
: openr,unit,file

this should be
openr, unit, file, /get
otherwise you'll get an undefined variable error on the openr.

: free_lun,unit
: ; found the file
: return, 1

: error:
: ;can't open the file, so it's probably not there
: return,0
: end

: So that you don't run into a problem if unit 1 is already used elsewhere.

: Bill Thompson

--
+------------------------+---------------------------------- --+---------+
| James Tappin, | School of Physics & Space Research | O__ |
| sjt@star.sr.bham.ac.uk | University of Birmingham | -- \/` |
| Ph: 0121-414-6462. Fax: 0121-414-3722 | |
+----------------------------------------------------------- --+---------+

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[Message index]

		Re: File test By: knipp on Wed, 31 May 1995 00:00
		Re: File test By: sjt on Wed, 31 May 1995 00:00
		Re: File test By: hahn on Tue, 30 May 1995 00:00
		Re: File test By: knipp on Tue, 30 May 1995 00:00

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