Hello,
This is an excerpt of tty_redraw_region in tty.c:
451 /*
452 * If region is >= 50% of the screen, just schedule a
window redraw. In
453 * most cases, this is likely to be followed by some more
scrolling -
454 * without this, the entire pane ends up being redrawn
many times which
455 * can be much more data.
456 */
457 if (ctx->orupper - ctx->orlower >= screen_size_y(s) / 2) {
458 wp->flags |= PANE_REDRAW;
459 return;
460 }
I suspect that "ctx->orupper - ctx->orlower" causes underflow
because ctx->orupper is less or equal than orlower and their
types are unsigned. This mean this condition is always true
unless they are equal.
I could be wrong, but is this condition right?
Thanks,
--
Yusuke Endoh <[email protected]>
------------------------------------------------------------------------------
What You Don't Know About Data Connectivity CAN Hurt You
This paper provides an overview of data connectivity, details
its effect on application quality, and explores various alternative
solutions. http://p.sf.net/sfu/progress-d2d
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