Re: [Take 2] winex11.drv: Fix buffer overflow bug in X11DRV_KeyEvent()and X11DRV_ToUnicodeEx()

[Muneyuki Noguchi]

Thank you for your comments.
> I'd suggest to have an initial buffer of 64 bytes allocated on the stack,
> and allocate a larger buffer only if required. That improves performance.

lpChar and Str are referenced after XmbLookupString() or XLookupString() is called. If both a buffer on stack and a buffer on heap can be created, every time the buffer is referenced, I need to check whether the used buffer is one on stack or not:

if (isStack) {
   lpChar[0] = 0;
 } else {
   lpChar2[0] = 0;
 }

This implementation is ugly and won't improve performance so much.