Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!ncar!midway!arthur!francis
From: francis@arthur.uchicago.edu (Francis Stracke)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Can't seem to get SFGetFile to work....!
Message-ID: <1990Sep26.215556.16391@midway.uchicago.edu>
Date: 26 Sep 90 21:55:56 GMT
References: <9183@potomac.ads.com>
Sender: news@midway.uchicago.edu (News Administrator)
Organization: Mathematics Department, University of Chicago
Lines: 30

In article <9183@potomac.ads.com> jtn@potomac.ads.com (John T. Nelson) writes:
>
[...]>Here's the problem. The very
>first thing I do in a program is call a function I call "selectFile"
>which is basically a shell wrapped around SFGetFile....
[...]
>Well the call to selectFile causes a Bus Error right on the SFGetFile
>and I can't figure out why.  I've checked with other Macintosh books
>("Using the Macintosh ToolBox with C", "Macintosh Revealed" and even
>"Inside Macintosh") and the call looks kosher.  Problem is that even
>the above three references vary on what they say should go into
>SFGetFile.
[...]
>selectFile looks like this....
[...]
>selectFile(char *name)
>{
>	int			numTypes;
>	OSType		tList;			/* Was SFTypeList */
[...] 
>	numTypes = -1;
[...]
>	tList = '????';
> 
>	SFGetFile(position, "\p", 0L, numTypes, &tList, 0L, &reply);
I'm assuming that passing a ptr to an OSType would be OK if SFGetFile
thought that it was an SFTypeList with 1 elt; but for that you probably
need numTypes=1! (Oh, God, it's thinking you've got 65535 file types!)
(I'm assuming because I'm a Pascal programmer myself, & all I've got is
IM, which, as we all know, completely ignores C.)