From: "David A. Black" <dblack@...>
Date: 2008-04-27T21:29:51+09:00
Subject: [OT] MFG (was: Re: Calling C functions from Embedded Ruby Interpreter)

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Hi --

On Sun, 27 Apr 2008, Mohit Sindhwani wrote:

> Hi Simon
>
> First, my apologies on the late response.  Thanks for your email relating=
 to=20
> my request.
>
> Simon Krahnke wrote:
>> * Mohit Sindhwani <mo_mail@onghu.com> (13:06) schrieb
>>> I know the subject line is quite a mouthful!  Sorry about that.
>>>=20
>>=20
>> I don't see anything wrong in the subject line.
>>=20
> Haha, thanks for that!
>
>>> I've managed to embed a Ruby interpreter into my application and I can=
=20
>>> call Ruby functions from the code in my application.  It works fine and=
=20
>>> returns results to me as expected.  I can also ask it to run a script f=
or=20
>>> me.
>>>=20
>>=20
>> Grats.
>>
>>=20
>>> set_default_color(0x00ff0000)
>>> set_screen_size(800,600)
>>> ..and so on.
>>>=20
>>> Now, as I understand it, in my application, I need to these C functions=
 in=20
>>> it:
>>> VALUE set_default_color (VALUE color)
>>> VALUE set_screen_size (VALUE w, VALUE h)
>>> .. and so on.
>>>=20
>>> I just don't know what to do next!
>>>=20
>>=20
>> Well, the Pickaxe has a chapter on this stuff.
>>=20
>> Try
>>=20
>> rb_define_global_function("set_default_color", &set_default_color, 1)
>>=20
>> There also is rb_define_module_function(VALUE model, char *name,
>> VALUE(*func)(), int argc) and rb_define_singleton_method taking the same
>> arguments. I never tried any of these, and don't quit know how to tell a
>> module function from a singleton function from a system function. (The
>> last one is in Kernel, the other two can be in any module or class.)
>>
>>=20
>
> Ya, actually wisdom strikes soon after one requests for help.  I did find=
 the=20
> necessary stuff in one of the links that I had been staring at for a whil=
e...=20
> and after that, it was easy enough to connect up the dots to get things=
=20
> moving.
>
> Thanks for the example.  I followed the procedure for defining a module a=
nd=20
> then creating the functions within it.  Not sure if I eventually want it =
to=20
> be that way but I know enough now to keep exploring.
>
>> mfg,                       simon .... l
>>=20
>
> Might I ask what "mfg" stands for?

Mit freundlichen Gr=C3=BC=C3=9Fen (with friendly greetings -- more or less =
like
"Best wishes").


David

--=20
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