Re: float[4][3] into NSValue

FROM : Lorenzo
DATE : Tue Nov 20 21:14:21 2007

Thank you Allen, it worked like a charm. And this is a great news.
I can now store a lot of data in a single line. I suppose this is
endian-safe. It will work on Intel ad PPC. Right?
I mean, I can write values on Intel and read values on PPC and viceversa,
right?

Best Regards
--
Lorenzo
email: <email_removed>
>
> From: Allen Smith <Allen.<email_removed>>
> Date: Tue, 20 Nov 2007 11:57:56 -0800
> To: Paul Sargent <<email_removed>>
> Cc: Lorenzo <<email_removed>>, <email_removed>
> Subject: Re: float[4][3] into NSValue
>


>
> On Nov 20, 2007, at 11:37 AM, Paul Sargent wrote:
>

>>
>> On 20 Nov 2007, at 19:16, Lorenzo wrote:
>>
>> 

>>> Can I store a float[4][3] into an NSValue object?
>>> Or can I store my own struct in an NSValue?
>>> If yes, how to do that?
>>> And how to get back the float[4][3] from the NSValue?
>>> 

>>
>> No, NSValues are for single values, not arrays of them.

>
> Why do you say that? NSValue can store arbitrary structures, as long as they
> are of fixed length.
>
> float test[4][3] = {{1.0, 2.0, 3.0}};
> float result[4][3] = {0.0};
>
> NSValue *value = [NSValue value:test withObjCType:@encode(float[4][3])];
>
> [value getValue:result];
>
> NSLog(@"%f %f %f", result[0][0], result[0][1], result[0][3]);
>
>
>>> >>
> 2007-11-20 11:54:03.553 test[18824] 1.000000 2.000000 0.000000
>
>
> Allen
>