wxEncodingConverter: Converting UTF8 to UNICODE with transliteration

[Volker Bartheld]

Hi!

I want to convert a string containing UTF-8 characters to UNICODE (for
storage in a wxString) and replace possibly invalid characters with '?'
or any other placeholder (if that's possible).

wxUSE_UNICODE is defined due to the _UNICODE preprocessor flag set.

         // ...
         // #define wxUSE_WCHAR_T 1
         // #define wxUSE_UNICODE 1
         char* pBuf="Hello World\xE4"; // add the the "ä"
         wxEncodingConverter EncConv;
         EncConv.Init(wxFONTENCODING_UTF8, wxFONTENCODING_UNICODE, wxCONVERT_SUBSTITUTE);
         wchar_t* pwBuf=new wchar_t[strlen(pBuf)+1];
         EncConv.Convert(pBuf, pwBuf);
         sBuf=wxString(pwBuf);
         // expecting L"Hello World?" in pwBuf
         delete[] pwBuf;

Currently, this code snippet returns false from
wxEnodingConverter::Init(), even if I set wxUSE_WCHAR_T to 1 in my
project's preprocessor options.

Should I recompile the wxMSW libraries or is there something else wrong
with my code?

Furthermore, UTF-8 strings can can be much longer than the number of
characters they represent. Since strlen() is not aware of that, I'm
wasting memory. Can I somehow detect what size of a buffer is necessary
for pwBuf?

Thanks a lot in advance for your opinions.

Volker
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