The Tor Browser / file revision

 // DefaultName.cpp

 #include "StdAfx.h"

 #include "DefaultName.h"

 static const wchar_t *kEmptyFileAlias = L"[Content]";

 UString GetDefaultName2(const UString &fileName, 

     const UString &extension, const UString &addSubExtension)

 {

   int extLength = extension.Length();

   int fileNameLength = fileName.Length();

   if (fileNameLength > extLength + 1)

   {

     int dotPos = fileNameLength - (extLength + 1);

     if (fileName[dotPos] == '.')

       if (extension.CompareNoCase(fileName.Mid(dotPos + 1)) == 0)

         return fileName.Left(dotPos) + addSubExtension;

   }

   return kEmptyFileAlias;

 }