Subj : Problem running a script... Crashes on a simple ">" operator...
To   : netscape.public.mozilla.jseng
From : acid_til@yahoo.com (Luc B.)
Date : Tue Jan 21 2003 11:22 am

Hello.

I've managed to compile my script and now i'm in the process of
testing whether the connection between my c++ object exposed to
javascript works fine. I seem to have encountered two errors in my
process.

Here is the script in question :
//<<Script begin ---------------------->
var XAvgLen = 50;

function main()
{   
   var ATR = 0;
   var XAvg = 0;
   var mathObj = new FOMath();
   var prodObj = new Prod();
   var tradeObj = new Trade();
   
   ATR = mathObj.AvgTrueRange(10);
   XAvg = mathObj.XAverage(prodObj.Open(0), XAvgLen);
   if (prodObj.Close(0) > XAvg)
   {
    //...
   }
}
//>>Script end   ---------------------->

1st error encountered :

When processing the line "XAvg = mathObj.XAverage(prodObj.Open(0),
XAvgLen);" XAvgLen is evaluated to 0... How come ??? Here is the
portion of my C++ code that does the processing :

//>>C++ code begin -------------->
   jsdouble price = 0.0f;
   int len = 0;

   if (!JS_ConvertArguments(cx, argc, argv, "di", &price, &len))
      return JS_FALSE;
//<<C++ code end   -------------->

Can anyone explain why this is happening??? When tracing the call
inside the javascript code the second argument is considered a NaN
!?!?!?!

Second error encountered : 

Like the subject says, when evaluating the following line "if
(prodObj.Close(0) > XAvg)" the javascript dll crashes with an
application error. "Memory could not be read" type... The faulty code
is the following line inside jsinterp.c

//Line 1725
RELATIONAL_OP(>);

Because it's in an evil C macro I can't trace properly and i'm left
puzzled as to why the crash occurs. Has anyone ever experienced a
similar error !?!?!

As always, thanks in advance for any help.

Luc.

.