OpenEuphoria

Re: [dos] trouble with image.e

• Posted by Robert Craig <rds at RAPIDEUPHORIA.COM> Jan 19, 2001
• 391 views

Colin Taylor writes:
> Your example appeared correct, so I tested it
> on my computer.  It worked fine.  Rob's example for
> get_screen_char() in Library.doc (which uses {s})
> appears incorrect.

Thanks. I'll fix the documentation.

Tacitus writes:
> overflow = length(char_attr) - 2 * (vc[VC_COLUMNS] - column + 1)
>     if overflow then
>  poke(scr_addr, char_attr[1..length(char_attr) - overflow])
>     else

> as i read it, the 'if' line overlooks that when overflow
> is negative, it will test true. in that case, the poke line
> will always be beyond bounds.

> on my version, 'if overflow > 0 then' works, and
> i think that's what was intended.

You are correct.
This bug was reported several months ago.
put_screen_char() in image.e should be modified
to have:
          if overflow > 0 then ...   -- correct
rather than:
          if overflow then ... -- wrong

Regards,
   Rob Craig
   Rapid Deployment Software
   http://www.RapidEuphoria.com