Correct mistakes in wxStripExtension - correct wxString::npos. Spurred by 1073642 filefn.cpp StripExtension(wxString &)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30838 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/string.h

@@ -80,16 +80,8 @@ class WXDLLIMPEXP_BASE wxString;
 // constants
 // ----------------------------------------------------------------------------
 
-#if defined(__VISAGECPP__) && __IBMCPP__ >= 400
-// must define this static for VA or else you get multiply defined symbols everywhere
-extern const unsigned int wxSTRING_MAXLEN;
-
-#else
 // maximum possible length for a string means "take all string" everywhere
-//  (as sizeof(StringData) is unknown here, we subtract 100)
+#define wxSTRING_MAXLEN wxStringBase::npos
-const unsigned int wxSTRING_MAXLEN = UINT_MAX - 100;
-
-#endif
 
 // ----------------------------------------------------------------------------
 // global data

src/common/filefn.cpp

@@ -361,17 +361,16 @@ void wxStripExtension(wxChar *buffer)
 
 void wxStripExtension(wxString& buffer)
 {
-  size_t len = buffer.Length();
+    //RN:  Be careful about the handling the case where 
-  size_t i = len-1;
+    //buffer.Length() == 0
-  while (i > 0)
+    for(size_t i = buffer.Length() - 1; i != wxString::npos; --i)
-  {
-    if (buffer.GetChar(i) == wxT('.'))
     {
-      buffer = buffer.Left(i);
+        if (buffer.GetChar(i) == wxT('.'))
-      break;
+        {
+          buffer = buffer.Left(i);
+          break;
+        }
     }
-    i --;
-  }
 }
 
 // Destructive removal of /./ and /../ stuff

src/common/string.cpp

@@ -56,14 +56,9 @@
 // static class variables definition
 // ---------------------------------------------------------------------------
 
-#if defined(__VISAGECPP__) && __IBMCPP__ >= 400
-// must define this static for VA or else you get multiply defined symbols
-// everywhere
-const unsigned int wxSTRING_MAXLEN = UINT_MAX - 100;
-#endif // Visual Age
-
 #if !wxUSE_STL
-  const size_t wxStringBase::npos = wxSTRING_MAXLEN;
+  //According to STL _must_ be a -1 size_t
+  const size_t wxStringBase::npos = (size_t) -1;
 #endif
 
 // ----------------------------------------------------------------------------