Date:	Sun, 7 May 1995 14:13:39 -0700 (PDT)
From:	RDC <rdc AT freenet DOT vancouver DOT bc DOT ca>
Subject:	Re: Int's need to be on paragraph boundaries?
To:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
Cc:	djgpp AT sun DOT soe DOT clarkson DOT edu

On Sun, 7 May 1995, Eli Zaretskii wrote:
> > i'm having an interesting problem.  i have the following struct that i am
> > reading in from a file:
> > somehow a byte is getting lost, and it doesn't make much sense.  i could
> 
> That's because the compiler is free to pad structure fields to make
> memory accesses more efficient.  If you want to make the structure
> packed (i.e. that its sizeof will be 13), use the __attribute__((packed))
> extension of GNU C (it's in the docs).
> 
 Is there an 'easy' pack/unpack conversion ?

 IE: I want to 'pack' for space considerations and 'unpack' for speed.
   ...  or ... would I need _two_ different arrays and move bytes between 
(slow and defeats any 'gains') ... (No sparse MAT code please ;> ).


RDC AT freenet DOT vancouver DOT bc DOT ca  UNIX(r) System V Release 4.0  [142.103.106.2]
http://www.freenet.vancouver.bc.ca    incoming:// 49 15 00 N   123 07 00 W

- Raw text -