OpenEuphoria

Re: Bug in Safe.e discovered today

• Posted by Al Getz <Xaxo at aol.com> Dec 29, 2005
• 593 views

Robert Craig wrote:
> 
> Al Getz wrote:
> > I checked all my 2.5 files and couldnt find any change.
> > The files were all from around the end of 2004.
> > 
> > What was the 'official' change that fixed this?
> 
> If you do a fc on safe.e between 2.4 and 2.5
> you'll see that several lines have changed. 
> 
> I think the relevant change was to add an
> if-statement to test if len is 0
> at the start of safe_address()
> I'm not sure if that was the only relevant change.
> 
> }}}
<eucode>
> function safe_address(atom start, integer len)
> -- is it ok to read/write all addresses from start to start+len-1?
>     atom block_start, block_upper, upper
>     sequence block
> 
>     if len = 0 then
>         return OK
>     end if
> 
>     ...
> </eucode>
{{{

> 
> Regards,
>    Rob Craig
>    Rapid Deployment Software
>    <a href="http://www.RapidEuphoria.com">http://www.RapidEuphoria.com</a>

Hi again Rob,

Oh ok that's great...thanks.  I could probably use the file then with 2.4 or
make the changes in 2.4's file too then.

BTW the -safe- level wrapping for 'c_func' was a very good idea...
that caught the error right away.  I didnt have to wait for the
program to try to peek or poke anything.


Take care,
Al

And, good luck with your Euphoria programming!

My bumper sticker: "I brake for LED's"