Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!netcom!avery
From: avery@netcom.UUCP (Avery Colter)
Newsgroups: comp.sys.apple2
Subject: Re: Q: Orca/C and SFMultiGet2
Message-ID: <18830@netcom.UUCP>
Date: 15 Dec 90 05:14:39 GMT
References: <1198@dg.dg.com>
Organization: Netcom- The Bay Area's Public Access Unix System {408 241-9760 guest}
Lines: 36

bkahn@archive.webo.dg.com (Bruce Kahn) writes:

>  Im trying to change a program I have that uses SFGetFile to use SFMultiGet2
>and am a bit stumped on something.  The value I get back from SFMultiGet2 is
>a structure that has 2 fields, good (boolean) and namesHandle (Handle).  The
>namesHandle structure is a handle to another structure; bufferLength (word)
>and fileEntryArray.  Im not that comfortable w/handles yet and so would
>appreciate any pointers (no pun intended?) on how I would dereference the
>handle namesHandle so that I can access the file array.  Some short sample
>could might also be helpful...

Ahhhh, lesseee, here it is in vol 3 of the Toolbox Ref [anyone who wants
to sell me volume 1 can mail me anytime!].

I believe a handle is a pointer to a pointer, or more precisely, a pointer
to an array of pointers. I believe this problem would be to do a double
dereference. In other words, I'm not completely sure, but this might be
treated as an array of arrays, i.e., you would do an expression like
namesHandle[fileNumber][fileAttribute].

Or, wait. fileEntryArray is the second element of a structure. OK,
so to get a pointer to a particular file's entry structure, you would
evaluate

(namesHandle->fileEntryArray)[fileEntry]

and to see a particlar attribute, you would use...

(namesHandle->fileEntryArray)[fileEntry].fileType for instance.

Is this right? Or should namesHanlde be dereffed?

-- 
Avery Ray Colter    {apple|claris}!netcom!avery  {decwrl|mips|sgi}!btr!elfcat
(415) 839-4567   "I feel love has got to come on and I want it:
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