From:	tom burgess <tburgess AT drao DOT nrc DOT ca>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Problem with integer declaration?
Date:	Sun, 03 May 1998 02:26:38 -0700
Organization:	BCTEL Advanced Communications
Lines:	16
Message-ID:	<354C384E.6F40@drao.nrc.ca>
References:	<354AB827 DOT 8EE19C9D AT mailexcite DOT com>
NNTP-Posting-Host:	pntn02m03-192.bctel.ca
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

The problem is that the default alignment for structure members is
32 bits for efficiency. Shorts get padded to 32 bits, hence you have
4 extra bytes because you have 2 shorts in your struct. The "packed"
attribute should prevent this, but at the moment I don't recall the
correct usage. Try djgpp info. I seem to recall that there may be a
bug with "packed" - you could check the delorie archives to get the
details.

	regards, tom

WT wrote:
> 
> I am trying to write a short program to detect VESA VBE and output
> information about the video card. I declared a struct of 512 bytes to be
> used as a buffer for vbe_info_block. The strange thing is that when I
> printed sizeof(vbe_info_block) it gave me 516 bytes instead of 512.

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