Re: [Mingw-users] BSTR to std::string (was: COM Problems)

[Paul G. <pjg...@ie...>]

Hi

> Again I've looked through the archives, but not found anything.
>
> How do I convert a BSTR to a std::string?
>
> If I was using MSVC, I'd use USES_CONVERSION and W2A or CComBSTR. However,
> non of these appear to be available in the Mingw Win32 library.

I've played a bit more and I've come up with a solution that works, but I'm
hoping someone can suggest a better cleaner way:

 class CharArray
 {
 public:
  explicit CharArray(unsigned long size) : m_pArray(0)
  {
   m_pArray = new char[size];
  }

  ~CharArray()
  {
   delete []m_pArray;
  }

 public:
  char* Contents()
  {
   return m_pArray;
  }

 private:
  char *m_pArray;


 private:
  CharArray(const CharArray&);
  CharArray& operator=(const CharArray&);

 };


 std::string BSTRToString(BSTR pBstr)
 {
  const unsigned long length = wcslen(pBstr);

  CharArray buffer(length);

  wcstombs(buffer.Contents(),pBstr,length);

  return buffer.Contents();
 }

Regards
Paul

Paul Grenyer
Email: pjg...@ie...
Web: www.paulgrenyer.co.uk

What do you mean you've never heard of Karnataka?

http://www.karnataka.org.uk