// String conversions
String::String(const wxString& wxstr)
{
#if !wxUSE_UNICODE
#error "This code only works in Unicode build of wxWidgets"
#endif
// ICU's UChar is 16bit wide, UTF-16, and the code below counts on it, so
// it would break if the definition changed:
wxCOMPILE_TIME_ASSERT(sizeof(UChar) == 2, UCharSizeMustBe16Bit);
#if SIZEOF_WCHAR_T == 2 // wchar_t==UChar
const UChar* str = wxstr.wc_str();
const size_t len = wxstr.length();
#else // SIZEOF_WCHAR_T == 4
// NB: we can't simply use wxstr.mb_str(wxMBConvUTF16()) here because
// the number of characters in UTF-16 encoding of the string may differ
// from the number of UTF-32 values and we can't get the length from
// returned buffer:
#if defined(wxUSE_UNICODE_UTF8) && wxUSE_UNICODE_UTF8
// in wx3's UTF8 mode, wc_str() returns a buffer, not raw pointer
wxWCharBuffer widestr(wxstr.wc_str());
#else
const wxChar *widestr = wxstr.wc_str();
#endif
const size_t widelen = wxstr.length();
// allocate buffer for the UTF-16 string:
wxMBConvUTF16 conv;
const size_t utf16bufLen = conv.FromWChar(NULL, 0, widestr, widelen);
wxCharBuffer utf16buf(utf16bufLen);
// and convert wxString to UTF-16 (=UChar*):
const UChar* str = (const UChar*)utf16buf.data();
size_t len = conv.FromWChar(utf16buf.data(), utf16bufLen, widestr, widelen) / 2;
#endif // SIZEOF_WCHAR_T == 4
// conversion to UTF-16 or getting internal buffer isn't supposed to fail:
wxASSERT_MSG(str != NULL, _T("failed string conversion?"));
m_impl = StringImpl::create(str, len);
}
operator const widechar* () const { return widestr(); }
