Using a FAT Filename Conversion Plug-in

This section describes how to dynamically load and call a FAT Filename Conversion plug-in to convert file names between Unicode and Windows code page.

Steps

1. Load the FAT Filename Conversion plug-in DLL.

   _LIT(KName,"cp1250");  //The name of the plug-in DLL
   const TUid KPluginUid={0x10206A9C}; //DLL UID acquired from Symbian
   RLibrary lib;
   
   //Encapsulate the UID of this DLL in TUidType.
   const TUidType serverUid(KNullUid,KNullUid,KPluginUid);    
   
   //load the DLL
   User::LeaveIfError(lib.Load(KName,serverUid));

   In this example, cp1250.dll is dynamically loaded. A function is then called to convert a character from Unicode to CP1250.

2. Get the exported function from the DLL.

   // Function at ordinal 1 converts text from a Unicode to CP1250.
   TLibraryFunction function1 = lib.Lookup(1);
   
   typedef void (*TConvertFromUnicodeL)(TDes8&, const TDesC16&);    
   TConvertFromUnicodeL aConvertFromUnicodeL = 
                               reinterpret_cast <TConvertFromUnicodeL> (function1);

3. Call the function to convert the text from Unicode to CP1250.

   TBuf8<15> foreign1;
   _LIT16(Uni_1, "\x0053\x0059\x004D\x0042\x0049\x0041\x004E\xFFFD\x20AC\x02C7\x2015");
   const TDesC16& unicode1(Uni_1);
   (*aConvertFromUnicodeL)(foreign1, unicode1);
   ...

4. Close the DLL.

   lib.Close();