for those who still create COM servers

  • Thread starter Thread starter Egbert Nierop \(MVP for IIS\)
  • Start date Start date
Bronek Kozicki said:
anyone willing to rewrite _bstr_t ? ;)
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That would be a hard task :<

I've been looking into the source, and that one looks much more dependent on
tiny subroutines, while the member functions of CComBSTR are independently
written.
Whynot just use CComBSTR instead of _bstr_t ?

in addition, CComBSTR2 also has methods like CString has (formatting), so if
you manipulate strings (in/out or retval) you even do not have to cast to
CString and BSTR back, thus again improving scalability. I only would like
someone to improve Join and Split on the CComBSTR2 class. These functions
are really slow.
 
Egbert Nierop (MVP for IIS) said:
Whynot just use CComBSTR instead of _bstr_t ?
Click to expand...

maybe because _bstr_t is already in your project if you use #import? Or
because it's more const-safe than CComBSTR? Or because it does simple
and nice Unicode<>ANSI conversions?


B.
 
Bronek Kozicki said:
maybe because _bstr_t is already in your project if you use #import? Or
Click to expand...

that would be 500bytes extra code on your compiled project ;-)
because it's more const-safe than CComBSTR? Or because it does simple and
nice Unicode<>ANSI conversions?
Click to expand...

Possibly. I never do Unicode <-> ansi conversions since I simply never
develop for Win9x/ME :).

There are very nice ATL conversion macro's that do the task already. But
since I don't know _bstr_t for sure, I cannot speak about this.
 
Egbert Nierop (MVP for IIS) said:
that would be 500bytes extra code on your compiled project ;-)
Click to expand...

and yet another string class, with different ownership semantics than
others. Mistakes in ownership handling can be pretty expensive, if you
forget the semantics of class you use. Thus I simply do not use the ones
I do not really need.
Possibly. I never do Unicode <-> ansi conversions since I simply never
develop for Win9x/ME :).
Click to expand...

I do use std::runtime_error (or actually my own classes derived from
thereof) and the problem is that it does not accept const wchar_t* :-(


B.
 
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