[Lesstif-discuss] Uninitialized Memory Reads in Scale.c

[Dave Williss]

I found a couple UMRs in Scale.c when running under Purify.  These should 
probably be initialized in the widget's initialize code.

 [W] UMR: Uninitialized memory read in showValue {6 occurrences}
   Reading 4 bytes from 0x0eef54b8 (4 bytes at 0x0eef54b8 uninitialized)
   Address 0x0eef54b8 is 304 bytes into a 432 byte block at 0x0eef5388
   Address 0x0eef54b8 points to a malloc'd block in heap 0x06bd0000
   Thread ID: 0x148
   Error location
       showValue      [scale.c:2007]
               if (Scale_Orientation(w) == XmHORIZONTAL)
               {
               Scale_ShowValueX(w) = SCB_SliderX(sb) + (SCB_SliderWidth(sb) 
>> 1) -
        =>         (Scale_ShowValueWidth(w) / 2) + XtX(sb);

               Scale_ShowValueY(w) = XtY(sb) - Scale_ShowValueHeight(w);
               }
[W] UMR: Uninitialized memory read in XmScaleConvertScaleValueToSCBValue {6 
occurrences}
       Reading 4 bytes from 0x0eef54a8 (4 bytes at 0x0eef54a8 
uninitialized)
       Address 0x0eef54a8 is 288 bytes into a 432 byte block at 0x0eef5388
       Address 0x0eef54a8 points to a malloc'd block in heap 0x06bd0000
       Thread ID: 0x148
       Error location
           XmScaleConvertScaleValueToSCBValue [scale.c:2247]
                   DEBUGOUT(_LtDebug(__FILE__, w, 
"_XmScaleConvertScaleValueToSCBValue()\n"));
                   roundarg = (double)(Scale_Value(w) - Scale_Minimum(w))
                        * (double)(SCB_MAX - SCB_MIN - Scale_SliderSize(w))
            =>          / (double)(Scale_Maximum(w) - Scale_Minimum(w));
                   /* amai: is this the correct formula?
                            looks like the old one in 
_XmScaleConvertSCBValueToScaleValue() */
                   result = (int)(roundarg);

       Reading 4 bytes from 0x0eef54b8 (4 bytes at 0x0eef54b8 
uninitialized)
       Address 0x0eef54b8 is 304 bytes into a 432 byte block at 0x0eef5388
       Address 0x0eef54b8 points to a malloc'd block in heap 0x06bd0000
       Thread ID: 0x148
       Error location
           showValue      [scale.c:2007]
                   if (Scale_Orientation(w) == XmHORIZONTAL)
                   {
                   Scale_ShowValueX(w) = SCB_SliderX(sb) + 
(SCB_SliderWidth(sb) >> 1) -
            =>         (Scale_ShowValueWidth(w) / 2) + XtX(sb);

                   Scale_ShowValueY(w) = XtY(sb) - 
Scale_ShowValueHeight(w);
                   }


-- Dave Williss
------
Meddle not in the affairs of dragons,
  for you are crunchy and taste good with catsup

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