From: "Smark" <not.provided@all.com>
Subject: Re: How to convert record?
Date: Fri, 26 Oct 2001 17:42:42 GMT
Date: 2001-10-26T17:42:42+00:00 [thread overview]
Message-ID: <mghC7.32891$pb4.16100029@news2.rdc2.tx.home.com> (raw)
In-Reply-To: MreC7.1456$xS6.2002@www.newsranger.com
"Ted Dennison" <dennison@telepath.com> wrote in message
news:MreC7.1456$xS6.2002@www.newsranger.com...
> In article <FE4C7.31012$pb4.15204037@news2.rdc2.tx.home.com>, Smark
says...
> >
> >
> >type Bubba_Type is record
> > C : Character; -- one byte
> > I : Integer; -- 4 bytes
> >end record;
> >
> >Bubba : Bubba_Type;
> >
> >Suppose that Integers must align on 4-byte boundaries. Then you might
get:
> >
> >Bubba_Type'Size = 40 (= 5 bytes)
> >
> >(Typename'size + System.Storage_Unit - 1) / System.Storage_Unit
> >= ( 40 + 8 - 1)/8 = 47/8 = 6 (bytes)
> >
> >But actually:
> >
> >Bubba'Size = 64 (= 8 bytes)
>
> I do not believe that is the case. If objects of this type are going to
have
> holes in the middle for alignment purposes, then that should be reflected
in the
> type's size.
>
Try it out, or check out what the GNAT reference manual has to say about
GNAT's
'Object_Size attribute (don't you suppose there is a reason that GNAT added
this attribute?).
Markku
next prev parent reply other threads:[~2001-10-26 17:42 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-21 9:56 How to convert record? Joseph Kwan
2001-10-22 11:30 ` John McCabe
2001-10-25 11:40 ` Joseph Kwan
2001-10-25 12:38 ` sk
2001-10-25 17:12 ` Jeffrey L. Susanj
2001-10-25 12:48 ` David C. Hoos
2001-10-29 1:42 ` Joseph Kwan
2001-10-29 13:35 ` Marc A. Criley
2001-10-25 12:48 ` Marc A. Criley
2001-10-25 12:54 ` sk
2001-10-25 15:41 ` Ted Dennison
2001-10-26 3:21 ` Smark
2001-10-26 5:45 ` James Rogers
2001-10-26 17:46 ` Smark
2001-10-26 14:30 ` Ted Dennison
2001-10-26 17:42 ` Smark [this message]
2001-10-26 20:02 ` Ted Dennison
2001-10-26 23:10 ` Jeffrey Carter
-- strict thread matches above, loose matches on Subject: below --
2001-10-29 18:16 Beard, Frank
2001-10-30 1:17 ` Adrian Hoe
2001-10-30 19:05 Beard, Frank
2001-10-31 4:10 ` Adrian Hoe
2001-10-31 19:40 Beard, Frank
2001-11-01 2:13 ` Adrian Hoe
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