X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f54cb154d59a7205b0f2829b5aea31882a379d60..491acfc75e9bf12806e177b655f3fb7df53e7602:/include/wx/string.h

diff --git a/include/wx/string.h b/include/wx/string.h
index 26fa4b4e4b..cc9e4dc8c8 100644
--- a/include/wx/string.h
+++ b/include/wx/string.h
@@ -209,7 +209,7 @@ inline int Stricmp(const char *psz1, const char *psz2)
 
 // 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
@@ -408,6 +408,7 @@ protected:
 #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
 
@@ -1004,8 +1005,8 @@ public:
         { 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); }
 
@@ -1049,8 +1050,8 @@ public:
 
   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; }
 
@@ -3510,7 +3511,18 @@ private:
       // 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();
   }
@@ -3529,7 +3541,8 @@ private:
   // wc_str() implementation helper
   wxScopedWCharBuffer AsWCharBuf(const wxMBConv& conv) const
   {
-      AsWChar(conv);
+      if ( !AsWChar(conv) )
+          return wxScopedWCharBuffer::CreateNonOwned(L"", 0);
 
       return m_convertedToWChar.AsScopedBuffer();
   }
@@ -3564,7 +3577,7 @@ private:
 };
 
 #ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
-    #pragma warning (default:4275)
+    #pragma warning (pop)
 #endif
 
 // string iterator operators that satisfy STL Random Access Iterator