Bug 1398 - Metadata Editor tag fields emptied when field length stored in project exceeds a given length

src/Tags.cpp

@@ -558,7 +558,7 @@ bool Tags::HandleXMLTag(const wxChar *tag, const wxChar **attrs)
          wxString value = *attrs++;
 
          if (!XMLValueChecker::IsGoodString(attr) ||
-             !XMLValueChecker::IsGoodString(value)) {
+             !XMLValueChecker::IsGoodLongString(value)) {
             break;
          }
 

src/xml/XMLTagHandler.cpp

@@ -36,19 +36,20 @@
 // Length check.  Is in part about not supplying malicious strings to file functions.
 bool XMLValueChecker::IsGoodString(const wxString & str)
 {
-   size_t len = str.length();
-   int nullIndex = str.Find('\0', false);
-   if ((len <= PLATFORM_MAX_PATH) && // Shouldn't be any reason for longer strings, except intentional file corruption.
-         (nullIndex == -1)) // No null characters except terminator.
+   // Originally based on MAX_PATH, which is way too limiting and just wrong since
+   // the length check is for a plain string and not a filename
+   if (IsGoodLongString(str) && str.length() <= 4096) // Shouldn't be any reason for longer strings, except intentional file corruption.
+   {
       return true;
-   else
-      return false; // good place for a breakpoint
+   }
+
+   return false;
 }
 
 // No length check, as e.g. labels could be very long.
 bool XMLValueChecker::IsGoodLongString(const wxString & str)
 {
-   return str.Find('\0', false) == -1; // No null characters except terminator.
+   return str.Find('\0', false) == wxNOT_FOUND; // No null characters except terminator.
 }