18 Feb
2002
18 Feb
'02
4:56 p.m.
Hi, I've been trying to fix up the code in controls/scrollbar.c to deal with overflow of a 32-bit int, but I've run into a problem.
In my test application, InfoPtr->MaxVal= is 0x7FFFFFFF (The largest signed int). InfoPtr->MinVal = 0.
However, in various places in the code "infoPtr->MaxVal-infoPtr->MinVal+1" is calculated.
This wraps the value around and causes bad things to happen.
Does anyone know if the "+1" is necessary?
Something has to be done differently, because what is happening now isn't right.
--Phil
Compaq: High Performance Server Systems Quality & Performance Engineering --------------------------------------------------------------------------- Phillip.Ezolt@compaq.com Performance Tools/Analysis