Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!hoptoad!tim
From: tim@hoptoad.uucp (Tim Maroney)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Please help w/ PBSetCatInfo
Message-ID: <9466@hoptoad.uucp>
Date: 3 Jan 90 03:19:55 GMT
References: <30340@shemp.CS.UCLA.EDU> <37560@apple.Apple.COM>
Reply-To: tim@hoptoad.UUCP (Tim Maroney)
Organization: Eclectic Software, San Francisco
Lines: 31

>In article <30340@shemp.CS.UCLA.EDU> tj@oahu.cs.ucla.edu (Tom Johnson) writes:
>>  error=PBGetCatInfo(&myInfoRec,false);
>>  if (error != noErr) SysBeep(10);
>>  [flags set, etc.]
>>  error=PBSetCatInfo(&myInfoRec,false);
>>  if (error != noErr) Debugger();
>>
>>When I run this code, no error is detected on the PBSetCatInfo call and
>>the CInfoPBRec appears to be correctly filled in, but PBSetCatInfo
>>returns error=FFD5 a fnfError (file not found).  Does anybody have
>>any idea why?  This has been driving me crazy for hours!!

In article <37560@apple.Apple.COM> keith@Apple.COM (Keith Rollin) writes:
>I think that what is happening is that your ioDirID field is being changed from
>MyCurID on the PBGetCatInfo call. Then, when you try the PBSetCatInfo call,
>you are using a DirID different from the original one.

Yes.  PBGetCatInfo changes the dirID it returns, apparently to the file
ID.  (Yet another place where this pointless feature is a pain in the
ass.)  It is necessary to save the dirID before calling PBGetCatInfo,
then to reset the ioDirID field to this saved value before calling
PBSetCatInfo.  And of course, this is completely undocumented, unless
you count the mysterious two-headed arrow before ioDirID in the
description of the PBGetCatInfo routine.
-- 
Tim Maroney, Mac Software Consultant, sun!hoptoad!tim, tim@toad.com

"When errors are found in old research, the relevant theories are
 re-examined.  When facts contradict theory, theory gets dumped.  Is
 that why the NLP people are unwilling to research their facts?"
	-- Jerry Hollombe on sci.psychology