Re: CoreFoundation

[Dr. H. Nikolaus Schaller]

Am 07.01.2015 um 10:28 schrieb Lundberg, Johannes <johannes@brilliantservice.co.jp>:

I think plists is a great way to store preferences

indeed. They are the grandfather of JSON.

and with base+cf I could have a universal way to access and modify system preferences in plists from both ObjC and C. I image there might be a situation where I wanna use plists for compatibility with gnustep but there is no objc+base installed.

Ok, I see.

On OS X, CoreFoundation is a pure C base library and it is heavily used to implement Foundation.framework.

But on GNUstep I think it is a wrapper around Base - just for compatibility reasons because there is a

lot of software that did not use the higher level abstraction of Obj-C frameworks but mixes high- and

low-level (because Apple encouraged to do so). So the low-level API was added in the most easy way.

So it *might* be that you always need to link against Base to use CoreBase (but I have never tried it

so this is not an authoritative answer).

You could also look for Apple’s CoreFoundation - it is open source. Apple initially introduced it around

OS X 10.3 or 10.4 to have a common base layer for making iTunes run on Linux and Windows as well.

Before that there was no CoreFoundation and everything was done in Obj-C.

BR,

Nikolaus

--

Johannes Lundberg

BRILLIANTSERVICE CO., LTD.

On Wed, Jan 7, 2015 at 6:17 PM, Dr. H. Nikolaus Schaller <hns@goldelico.com> wrote:

Am 07.01.2015 um 09:44 schrieb Lundberg, Johannes <johannes@brilliantservice.co.jp>:

Thanks Nikolaus!

Yeah, I guess writing a simple c-wrapper and linking to base would be one solution. But since this is pure C I was hoping to not have to link to ObjC and base. Maybe I’ll do it as a temporary solution.

What is the problem with linking to objc and base? They are most likely available on the deployment system (or why would you then want to access NSUserDefaults?).

But in this case, what would [NSUserDefaults standardDefaults] return since there is no bundle?

I think it just works but you don’t have defaults connected to the bundleIdentifier. You can use [[NSUserDefaults alloc] initWithUser:user] and -persistentDomainForName for any user name and identifier.

Btw, would CoreBase require linking to base? Sounds weird to me if it would..

--

Johannes Lundberg

BRILLIANTSERVICE CO., LTD.

On Wed, Jan 7, 2015 at 5:13 PM, Dr. H. Nikolaus Schaller <hns@goldelico.com> wrote:

Am 07.01.2015 um 02:15 schrieb Lundberg, Johannes <johannes@brilliantservice.co.jp>:

Hi

Lately I been finding myself in the need of manipulating the defaults register from C code

You can simply rename your source file to file.m. Obj-C is a superset of standard C.

Or you can wrap Obj-C calls in a C function and link that .m file to your other C files.

You alway have to link against Base.

and I remember some discussion about CF a while ago where someone was working on it.

What is the current status? How complete and usable is CF?

Thanks!

--

Johannes Lundberg

BRILLIANTSERVICE CO., LTD.

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