Re: mvwprintw

[Bob Rossi]

On Fri, Mar 31, 2006 at 02:17:47PM -0500, Thomas Dickey wrote:
> On Fri, 31 Mar 2006, Bob Rossi wrote:
> 
> >Now, the trace file I sent to you looked good to me. Did it look good to
> >you? Wouldn't the problem be detectable there? If you didn't see the
> 
> yes - but -
> 
> >file, I'll send it in again in this Email. The line:
> >(tgdb) b main.c:7
> >gets corrupted during the last display. Looks like this:
> >(tgdb) b main1Cc:
> 
> If something (outside ncurses) happens to write to the screen in the 
> middle of an escape sequence, that could produce this effect.  I see a 
> cursor-movement string being computed at the end of the trace:
> 
> GoTo(59, 14) from (59, 13)
> + + called {mvcur(59,13,59,14)
> + + + called {tparm("\e[%i%p1%d;%p2%dH", 59, 14)
> + + + return }"\e[60;15H"
> + + + called {tparm("\e[%p1%dC", 1)
> + + + return }"\e[1C"
> + + + called {tparm("\e[%p1%dC", 14)
> + + + return }"\e[14C"
> + + + called {tparm("\e[%p1%dB", 59)
> + + + return }"\e[59B"
> + + + called {tparm("\e[%p1%dC", 14)
> + + + return }"\e[14C"
> + + + called {tparm("\e[%p1%dC", 1)
> + + + return }"\e[1C"
> + + return }0
> 
> It's possible that readline is emitting a single character as part of some 
> stray optimization that it's doing for the repainting (note that the GoTo 
> call is moving right by one character).  You can verify this by capturing 
> the output using script.  I use the unmap program (in ncurses' ftp 
> directory) to render typescript files readable.
> 
> If one part of the program is writing buffered output and another is 
> writing unbuffered, e.g., writing on stdout and stderr, then it's a matter 
> of timing whether certain characters come out in a given order.

OK, here is the script file that has the error. I also have the the
output of unmap attached. I am having a little trouble reading these
files for the first time. I suppose I better get good at it.

See anything interesting?

Thanks,
Bob Rossi

typescript
Description: Text document

typescript.unmap
Description: Text document