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From: philip@Minnie.Stanford.EDU (Philip Machanick)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Resource Fork data storage--related question
Message-ID: <1990Jul22.230744.14761@Neon.Stanford.EDU>
Date: 22 Jul 90 23:07:44 GMT
References: <2172@uc.msc.umn.edu> <1990Jul17.172044.20361@Neon.Stanford.EDU> <1715MAYER-A@RICEVM1>
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Reply-To: philip@pescadero.stanford.edu
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Organization: Computer Science Department, Stanford University
Lines: 39

In article <2172@uc.msc.umn.edu>, souka@uh.msc.umn.edu (Omar Souka) writes:
> > I have a related question. It may be more of a Pascal question than a
> > Macintosh question, though.  I would like to retrieve the contents
> > of a (rather long) array.  A resource of my own type seems
> > like a logical structure for this.
> > 
> > I know how to load a resource into memory, but I don't see how then to
> > store the contents into an array I've declared...
> > 
> > I would appreciate any suggestions or better ideas.  Thanks!
[...]
> Reading from the resource
> 
> 1.  Call GetResource
> 
> 2.  If you need to know how big the handle is call HandleSize
> 
> 3.  BlockMove from the resource into your array
> 
> 	BlockMove(*ResourceHandle,array,number_of_bytes);
> 
> In Pascal it would look something like this (just a guess, I don't do Pascal)
> 
> 	BlockMove(ResourceHandle^,@array,number_of_bytes)
> 
Why not store the result of GetResource directly into the array? You would
have to use the array through a handle, e.g., in Pascal:
  type
    arrayPtr = ^arrayType;
    arrayHdl = ^arrayPtr;
  var
    data : arrayHdl;
  begin
    data := arrayHdl(GetResource(...));

Saves you a blockmove (why copy data unnecessarily?).

Philip Machanick
philip@pescadero.stanford.edu