From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michal Nazarewicz <mina86@tlen.pl>
Subject: Re: union to get parts of integer
Date: Mon, 20 Dec 2010 15:44:48 +0100
Message-ID: <87aak0tsf3.fsf@erwin.mina86.com>
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In-Reply-To: <AANLkTikAB_-kO_cmD5VQRtztx=4V9NDcmU4uWBDE=ON8@mail.gmail.com>
	(ratheesh k.'s message of "Mon, 20 Dec 2010 16:10:17 +0530")
Sender: linux-c-programming-owner@vger.kernel.org
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To: ratheesh k <ratheesh.ksz@gmail.com>
Cc: linux-c-programming@vger.kernel.org

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ratheesh k <ratheesh.ksz@gmail.com> writes:

> typedef struct {
> char parts[4];
> } node ;
>
> int i=3D0x12345678
>
> ((node *)&i)->parts[0];
> ((node *)&i)->parts[1];
> ((node *)&i)->parts[2];
> ((node *)&i)->parts[3];
>
> Is there any mechanism to split into bytes using the power of union ?

The above should work (assuming of course that sizeof(int) =3D=3D 4).  The
following should work as well:

((char *)&i)[0].

However, are you sure that you need this?  Don't you need "(i & 255)",
"((i >> 8) & 255)", etc. instead?

=2D-=20
Best regards,                                         _     _
 .o. | Liege of Serenly Enlightened Majesty of      o' \,=3D./ `o
 ..o | Computer Science,  Michal "mina86" Nazarewicz   (o o)
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