[futurebasic] Re: [Fwd: Re: [FB] FSSpecs vs FSRefs]

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From: Brian Stevens <bstevens33@...>
Date: Sun, 27 Jan 2008 15:01:24 -0700
On Jan 27, 2008, at 2:45 PM, andy@... wrote:
>> On Jan 26, 2008, at 3:01 AM, andy@... wrote:
>>
>>> Hi Brian / Robert,
>>>
>>> I am finding it hard to track down the documentation on FSRefs
>> Tons. The FileManager section of XCode docs or Apple Developer web
>> site. What is it specifically you need to know?
>
> How FSRefs are applied and used in FB...
At a toolbox call level FB's use of FSRef is virtually the same (not  
counting syntax differences between the two languages) as C. There  
are numerous C examples.

>
>> FBtoC documents any differences from FB. Other than that it uses
>> FSRefs the same way Apple defines them. There is nothing extra added
>> or removed.
>
> ok. I can't actually find the references in the Apple  
> documentation. A url
> would be useful.

Did you see the long detailed explanation by Ken a few days ago? It  
was a good summary. Read it.
Also the carbondev list has some discussion - not as complete as  
Ken's and focuses on FSRef compared to POSIX. That url is: http:// 
www.carbondev.com/site/?page=FSRefvsPOSIX

>
>>> Locate application volume
>
> I presume I cannot use SYSTEM(_Aplvol) - what is the alternative?

Again, a solution was posted yesterday. Look for it.

>
>>> Goto Sub folder
>
> Folder has gone - what is the alternative?
This is mentioned in the FBtoC documentation in the section "Adapting  
your Code for FBtoC" There have been a few recent posts demonstrating  
how to use FSFindFolder. Please take a look at these and then post  
again with whatever questions you have for things you don't know how  
to do. Be as specific as possible.



>
>>> Let user select folder
>>> Open file for Read
>>> Read file
>>> Open file for Write
>>> Write file
>>
>> Read file, Write file are not concerned with how the file was opened
>> (i.e. with a FSSpec or a FSRef) so their syntax for use with FSRefs
>> does not change. All they do is read or write. The choice of FSRef
>> vs. FSSpec comes when the file is OPENed (see the Language
>> Enhancement section of FBtoC help). Open file for read or write is
>> also documented in the Language Enhancement section of FBtoC docs.
>>
>> "Let user select folder". This is just a matter of picking the FSRef
>> version of a call when call Navigation Services. If you are asking
>> about the corresponding FSRef support in files$ for _FSSpecFolder, it
>> doesn't exist yet (AFAIK). Somebody will have to write it or you will
>> have to cal Nav Services directly (which is what files$ does)
>
> Ok, thanks Brian, useful information - it should be saved somewhere so
> newbies can access this.

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Brian S.