// Lightweight object returned by wxString::c_str() and implicitly convertible
// to either const char* or const wchar_t*.
-class WXDLLIMPEXP_BASE wxCStrData
+class wxCStrData
{
private:
// Ctors; for internal use by wxString and wxCStrData only
#ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
// "non dll-interface class 'wxStringPrintfMixin' used as base interface
// for dll-interface class 'wxString'" -- this is OK in our case
+ #pragma warning (push)
#pragma warning (disable:4275)
#endif
{ return iterator(str(), wxStringOperations::AddToIter(m_cur, -n)); }
private:
- iterator(wxString *str, underlying_iterator ptr)
- : m_cur(ptr), m_node(str, &m_cur) {}
+ iterator(wxString *wxstr, underlying_iterator ptr)
+ : m_cur(ptr), m_node(wxstr, &m_cur) {}
wxString* str() const { return const_cast<wxString*>(m_node.m_str); }
private:
// for internal wxString use only:
- const_iterator(const wxString *str, underlying_iterator ptr)
- : m_cur(ptr), m_node(str, &m_cur) {}
+ const_iterator(const wxString *wxstr, underlying_iterator ptr)
+ : m_cur(ptr), m_node(wxstr, &m_cur) {}
const wxString* str() const { return m_node.m_str; }
// about it and doing it like this, i.e. having a separate AsChar(),
// allows us to avoid the creation and destruction of a temporary buffer
// when using wxCStrData without duplicating any code
- AsChar(conv);
+ if ( !AsChar(conv) )
+ {
+ // although it would be probably more correct to return NULL buffer
+ // from here if the conversion fails, a lot of existing code doesn't
+ // expect mb_str() (or wc_str()) to ever return NULL so return an
+ // empty string otherwise to avoid crashes in it
+ //
+ // also, some existing code does check for the conversion success and
+ // so asserting here would be bad too -- even if it does mean that
+ // silently losing data is possible for badly written code
+ return wxScopedCharBuffer::CreateNonOwned("", 0);
+ }
return m_convertedToChar.AsScopedBuffer();
}
// wc_str() implementation helper
wxScopedWCharBuffer AsWCharBuf(const wxMBConv& conv) const
{
- AsWChar(conv);
+ if ( !AsWChar(conv) )
+ return wxScopedWCharBuffer::CreateNonOwned(L"", 0);
return m_convertedToWChar.AsScopedBuffer();
}
};
#ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
- #pragma warning (default:4275)
+ #pragma warning (pop)
#endif
// string iterator operators that satisfy STL Random Access Iterator