[Gambas-devel] Returning a reference to an array ...

[Gareth Bult]

I think my main problem here is the lack of a working example to reference ..
For example, I can't find an instance of GB.Array.New that uses (GB_TYPE)GB.FindClass
anywhere in the Gambas source tree ....

Gareth.

----- Original Message -----
From: "Gareth Bult" <gareth at ...560...>
To: "mailing list for gambas developers" <gambas-devel at lists.sourceforge.net>
Sent: Monday, 12 January, 2009 6:03:47 PM GMT +00:00 GMT Britain, Ireland, Portugal
Subject: Re: [Gambas-devel] Returning a reference to an array ...

Ok, 

I'm obviously being a bit dull .. however, the following code now seems to 
compile OK, however then I try to run it, Gambas reports "No return value".
[so GB.ReturnObject(array) isn't working??]

BEGIN_METHOD_VOID(CCONNECTION_audio_devices)

	struct iaxc_audio_device *devs;
	int ndevs,input,output,ring,i;

	GB_ARRAY array;
	CIAX2DEVICE *dev;

	iaxc_audio_devices_get(&devs,&ndevs,&input,&output,&ring);

	GB.Array.New(&array, (GB_TYPE)GB.FindClass("IAX2Device"), 1);

	for (i = 0; i < ndevs; i++)
	{
		GB.New((void**)&dev,GB.FindClass("IAX2Device"),NULL,NULL);
		GB.Ref(dev);
		GB.NewString(&dev->name,devs[i].name,0);
	  	*((void **)GB.Array.Get(array, i)) = dev;
	}	
	GB.ReturnObject(array);
	return;

END_METHOD

Does the above seem "sane"?
Am I missing something critical??

I think I've had this code before and had the same problem, been trying lots of different approaches ...

Gareth.

----- Original Message -----
From: "Benoit Minisini" <gambas at ...1...>
To: "mailing list for gambas developers" <gambas-devel at lists.sourceforge.net>
Sent: Monday, 12 January, 2009 4:14:16 PM GMT +00:00 GMT Britain, Ireland, Portugal
Subject: Re: [Gambas-devel] Returning a reference to an array ...

On lundi 12 janvier 2009, Gareth Bult wrote:
> Hi,
>
> I inserted your code to start with just replacing <<number of devices>> ...
> I get;
>
> iax2.c:455: warning: passing argument 2 of 'GB.Array.New' makes integer
> from pointer without a cast iax2.c:459: warning: dereferencing 'void *'
> pointer
> iax2.c:459: error: invalid use of void expression
> iax2.c:460: error: void value not ignored as it ought to be
>
> When compiling ..
>
> GB.Array.New seems to be expecting a GB_T constant , whereas GB.FindClass
> is returning a pointer (???)
>
> So whereas I would love to use;
>
> #GB.Array.New(&array, GB.FindClass("IAX2Device"), <<number of devices>>);
>
> It seems this option is not available .. which is why I was using;
>
> #GB.Array.New(&array,GB_T_OBJECT,ndevs);
>
> Help!
>
> Gareth.
>

I forgot a cast.

GB.Array.New(&array, (GB_TYPE)GB.FindClass("IAX2Device"), <<number of 
devices>>);

You can use GB_T_OBJECT. But now you can have specialized arrays in Gambas, so 
why not using them? :-)

-- 
Benoit Minisini

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-- 
Managing Director, Encryptec Limited
Tel: 0845 5082719, Mob: 0785 3305393
Email: gareth at ...560... 
Statements made are at all times subject to Encryptec's Terms and Conditions of Business, which are available upon request.