Re: Trouble getting QuantLibAddin to work with vc 7.1

Posted by Plamen Neykov on May 18, 2005; 7:12am
URL: http://quantlib.414.s1.nabble.com/Trouble-getting-QuantLibAddin-to-work-with-vc-7-1-tp10802p10806.html

On Wednesday 18 May 2005 15:00, eric ehlers wrote:

> On 5/18/05, Plamen Neykov <[hidden email]> wrote:
> > Hi Eric,
> >
> > unfortunately the following program crashes also exactly in the same way
> > as the add-in:
> >
> > #include <iostream>
> > int main(int argc, char* argv[])
> > {
> >         char* p = "Test";
> >         p[0] = 'P';
> >         std::cout << p;
> >         return 0;
> > }
> >
> > It doesn't matter which compiler switches I use to compile it - either in
> > the ide or via the command line. It crashes even if I compile it like
> > that: cl Test.cpp
> > My compiler version is 13.10.3077
> >
> > It seems to me that my compiler is placing string literals _allways_ in
> > readonly memory disregarding the compiler switches I use .....
> >
> > Thanks & Regards
> > Plamen
>
> Hi Plamen
>
> I guess this is the issue described here:
> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclang/htm
>l/vclrfstringliteralshavepropertypeofconstchar[].asp
>
> Interestingly at this link ...
> <a href="http://support.microsoft.com/default.aspx?scid=%2Fservicedesks%2Fwebcasts%2">http://support.microsoft.com/default.aspx?scid=%2Fservicedesks%2Fwebcasts%2
>Fen%2Ftranscripts%2Fwct032003.asp ... it says "You need to compile this code
> at a command prompt without using any specific compiler switches" - but you
> tried that and it
> didn't fix the problem - I assume that that unofficial document is out
> of sync with your version of VC7.1.
>
> I think it should be straightforward to refactor the TempStr function
> to not use string literals, I'll look into this and get back to you.
>
> Regards
> Eric

Hi Eric,

I've took a look where the TempStr function is used - it comes predominantely
in the generated code - qladdin.cpp, I found only one reference elsewhere -
in the file xlutils.cpp. I think the python generaton procedure could be
easily changed in the way to generate in the first byte of a string literal
the size of it directly so that this doesn't have to be done run-time - I
could try to change it - what do you think?

Thanks,
Plamen